博士（工学）, 電気通信大学

Mathematical Reliability

Optimal Maintenance Policy

Condition Monitoring

Maintenability

Reliability Engineering

Social infrastructure (civil Engineering, architecture, disaster prevention), Safety engineering

Social infrastructure (civil Engineering, architecture, disaster prevention), Social systems engineering

01 Apr. 2016
電気通信大学, 大学院情報理工学研究科、情報理工学部, 准教授

01 Apr. 2010 - 31 Mar. 2016
電気通信大学, 大学院情報理工学研究科、情報理工学部, 助教

01 Apr. 2007 - 31 Mar. 2010
電気通信大学, 電気通信学部システム工学科, 助教

01 Jun. 2006 - 31 Mar. 2007
電気通信大学, 電気通信学部システム工学科, 助手

01 Apr. 2006 - 31 May 2006
電気通信大学, 電気通信学部システム工学科, 産学官連携研究員

Apr. 2003 - Mar. 2006
The University of Electro-Communications, Graduate School of Electro-Communications, 博士後期課程

Apr. 2001 - Mar. 2003
The University of Electro-Communications, Graduate School of Electro-Communications, 博士前期課程

Oct. 2000 - Mar. 2002
電気通信大学, 国費留学 研究生

Sep. 1996 - Jul. 2000
哈爾浜工程大学, 自動制御学部

01 Sep. 1993 - 20 Jul. 1996
哈爾浜第三高校, China

Jan. 2023 - Dec. 2024
Secretary, IEEE Reliability Society, Japan Chapter

Mar. 2021 - Feb. 2023
Treasurer, IEEE Reliability Society, Japan Chapter, Society

May 2015
信頼性誌編集委員会委員, 日本信頼性学会

Oct. 2013
評議員, 日本品質管理学会, Society

May 2013
評議員, 日本信頼性学会, Society

Oct. 2009
論文誌編集委員会委員, 日本品質管理学会, Society

Dec. 2023
2023 Asian Conference of Management Science and Applications (ACMSA2023)
Excellent Paper of Special Session,

May 2023
日本品質管理学会
第131回研究発表会優秀発表賞

Dec. 2022
The 4th International Conference on System Reliability and Safety Engineering (SRSE 2022)
The best presenter award

Oct. 2022
日本品質管理学会
第20回アジア品質管理シンポジウム国際会議, The Best Paper Award
International society

Oct. 2021
The 3rd International Conference on System Reliability and Safety Engineering (SRSE 2021)
China
The best presenter award
International society, China

Oct. 2021
第19回アジア品質管理シンポジウム国際会議, The Best Paper Award

Oct. 2020
第18回アジア品質管理シンポジウム国際会議, The Best Paper Award

Oct. 2019
第17回アジア品質管理シンポジウム国際会議, The Best Paper Award

May 2019
日本品質管理学会
第119回研究発表会優秀発表賞

Sep. 2017
第15回アジア品質管理シンポジウム国際会議,
第15回アジア品質管理シンポジウム国際会議, The Best Paper Award

May 2016
日本信頼性学会
第23回春季信頼性シンポジウム優秀賞, 小山尚晃;金路;鈴木和幸

Sep. 2015
第13回アジア品質管理シンポジウム国際会議
13th アジア品質管理シンポジウム国際会議 (13th ANQ Congress Taipei) 2015年度The Best Paper Award

Jun. 2015
日本信頼性学会
2014年度若手奨励賞

Oct. 2014
デミング賞委員会
『新版 信頼性ハンドブック』分担執筆
日経品質管理文献賞
Publisher

Sep. 2009
7th アジア品質管理シンポジウム国際会議 (7th ANQ Congress Tokyo) 2009年度The Best Paper Award

May 2008
日本信頼性学会 2007年度若手奨励賞

Mar. 2007
IEEE Reliability Society, Japan Chapter 2006年度 Best Paper Award

Feb. 2006
IEEE Reliability Society, Japan Chapter 2005年度 Outstanding Young Scientist Award

Nov. 2005
日本品質管理学会 2005年度 研究奨励賞受賞

Sep. 2003
1stアジア品質管理シンポジウム国際会議(1st ANQ Congress Tokyo) 2003年度The Best Paper Award (with encouragement)

Condition-Based Maintenance Policies for Markovian Deteriorating Systems with Cumulative Damage From External Shocks
Wang, Z; Jin, L; Yamamoto, W
Total Quality Science 採択済, 2023
Scientific journal, English

Conrition-based maintenance for a Wiener Degradation Process Under Consideration of Heterogeneity in spare unit Populatio
Kasuya, M; Jin, L
Total Quality Science, 9, 29-41, 2023, Peer-reviwed
Scientific journal, English

Optimal age-replacement policy for series systems considering maintenance time
Fujioka, K; Jin, L
Corresponding, Total Quality Science., 8, 1, 51-60, 27 Dec. 2022, Peer-reviwed, Invited
Scientific journal, English

Optimal (τ;Opportunistic Maintenance Policy for Series Systems Considering Maintenance Time
Fujioka, K; Jin, L
Proceedings of The 4th International Conference on System Reliability and Safety Engineering (SRSE 2022), 1-6, Dec. 2022, Peer-reviwed
English

Joint maintenance and load-sharing optimization for two-unit systems with workload-dependent deterioration
Ashizawa, R; Jin, L
Corresponding, Total Quality Science, 8, 1, 41-50, Dec. 2022, Peer-reviwed, Invited
Scientific journal, English

Condition-Based Maintenance for Deteriorating Systems Subject to External Shock Damage Under Semi-Markov Decision Process
Wang, Z; Jin, L
Corresponding, Proceedings of the 19th Asian Network for Quality Congress (ANQ 2022), 1-10, Oct. 2022, Peer-reviwed
International conference proceedings, English

Optimal Replacement Policy for Wiener Degradation Process Under Consideration of Population Heterogeneity
Kasuya, M; Jin, L
Corresponding, Proceedings of the 19th Asian Network for Quality Congress (ANQ 2022), 1-10, Oct. 2022, Peer-reviwed
International conference proceedings, English

Certain Properties of Condition-based Maintenance for k-out-of-n:G Systems Considering Economic Dependence
Ikenoya, S; Jin, L
Corresponding, Proceedings of the 19th Asian Network for Quality Congress (ANQ 2022), 1-10, Oct. 2022, Peer-reviwed
International conference proceedings, English

Cost and Availability Optimization of Imperfect Inspection Frequencies under Periodic Perfect Inspections
Izuwaki, R; Jin, L
Corresponding, Proceedings of the 19th Asian Network for Quality Congress (ANQ 2022), 1-10, Oct. 2022, Peer-reviwed
International conference proceedings, English

Optimal Replacement Policy for Wireless Sensor Networks
Jin, L; Yamamoto, W; Iwamoto, Y
Corresponding, Proceedings of 2022 Asia Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2022), 1-8, Oct. 2022, Peer-reviwed
International conference proceedings, English

Properties of American Options Under a Semi-Markov Modulated Black-Scholes Model
Takada, K; Dimitrov, M; Jin, L; Ni, Y
Corresponding, The proceedings of the 7th Stochastic Modeling Techniques and Data Analysis International Conference and Demographics 2022 Workshop (SMTDA2022), 1-16, Jun. 2022, Peer-reviwed
International conference proceedings, English

Optimal Maintenance Policy for a Two-state System with Population Heterogeneity Under Partial Observation
Kasuya, M; Jin, L
Proceedings of the 7th Stochastic Modeling Techniques and Data Analysis International Conference and Demographics 2022 Workshop (SMTDA2022), 1-10, Jun. 2022, Peer-reviwed
International conference proceedings, English

Optimal age-replacement policy for multi-unit systems considering maintenance time
Fujioka, K; Jin, L
Corresponding, Proceedings of the 19th Asian Network for Quality Congress (ANQ 2021), 1-10, Oct. 2021, Peer-reviwed
International conference proceedings, English

Valuation and Optimal Strategies for American Options under a Markovian Regime-Switching Model
Jin, Lu, Marko Dimitrov, and Ying Ni..
Stochastic Processes and Algebraic Structures, Volume 1. Stochastic Processes, Statistical Methods, and Engineering Mathematics Ed. by Anatoliy Malyarenko, Ying Ni, and Milica Rančić, Springer International Publishing, 1, 121-144, Jun. 2021, Peer-reviwed, False
International conference proceedings, English

American Option Pricing under a Varying Economic Situation Using a Semi-Markov Decision Process
Takada, K; Dimitrov; M. Jin, L; Ni, Y
Corresponding, Data analysis and application, Wiley, Jun. 2021, Peer-reviwed
International conference proceedings, English

Pricing for American option using a semi-Markov decision process
Kouki, Takada; Marko Dimitrov; Lu Jin; Ying Ni
Procedings of The 19th Conference of the Applied Stochastic Models and Data Analysis International Society (ASMDA2021), 1-10, Jun. 2021, Peer-reviwed, Invited
International conference proceedings, English

Properties of American-type Options under a Markovian Regime-Switching Model
Marko Dimitrov; Lu Jin; Ying Ni
Journal Communications in Statistics: Case Studies, Data Analysis and Applications, 7, 4, 573-589, 2021, Peer-reviwed
Scientific journal, English

Optimal Replacement Policy for a Deteriorating System Subjected to Geometric Brownian Motion
Yoshida, R; Jin, L
Total Quality Science, 7, 3, 113-124, 2021, Peer-reviwed
Scientific journal, English

Threshold policy of condition-based maintenance for a multi-state system and deteriorating sensor
Genda, S; Jin, L
Total Quality Science, 7, 2, 90-102, 2021, Peer-reviwed
Scientific journal, English

Optimizing Opportunistic Maintenance by Using a Semi-Markov Decision Process
Odajima, Y; Jin, L
Total Quality Science, 6, 1, 91-103, 2021, Peer-reviwed
Scientific journal, English

Threshold Type Maintenance Policies for Systems Under Cumulative Damage From Random Shocks
Jin, L; Matoba, S
The 9th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2020), (Virtual conference), 1-6, Aug. 2020, Peer-reviwed, Invited
International conference proceedings, English

Structured maintenance policy for deteriorating systems under cumulative shocks
Matoba, S; Jin, L
Corresponding, Proceedings of the International Conference on Stochastic Processes and Algebraic Structures – From Theory Towards Applications, 03 Oct. 2019, Peer-reviwed
International conference proceedings, English

Optimization for Opportunistic Maintenance with Semi-Markov Decision Process
Odajima, Y; Jin, L
Proceedings of the 17th Asian Network for Quality Congress (ANQ 2019), 1-10, Oct. 2019, Peer-reviwed
International conference proceedings, English

American Option Pricing under Markovian Regime Switching Model
Jin, L; Sakurai, Y
Proceedings of the 18th Conference of the Applied Stochastic Models and Data Analysis International Society (ASMDA 2019), 1-8, Jun. 2019, Invited
International conference proceedings, English

An Integrated Policy on Operation and Maintenance for Load Sharing Systems with Deterioration
Jin, L
Proceedings of the 16th Asian Network for Quality Congress (ANQ 2018), 1-10, Sep. 2018, Peer-reviwed
International conference proceedings, English

Integrated Inspection Policies for Systems with Increasing Failure Rates
Jin, L; Yamamoto, W
Proceedings of the 8th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2018), xx, xx, 1-10, Aug. 2018
International conference proceedings, English

私の提言～学会のダイバーシティについて～
金 路
日本品質管理学会誌「JSQCニュース」, xx, xx, 1-1, 2018
Research institution, Japanese

Optimal Policy for Periodic Inspections with Flexible Imperfect Inspection Frequencies
Jin, L; Koyama, N; Yamamoto, W
Total Quality Science, 4, 3, 128-137, 2018, Peer-reviwed
Scientific journal, English

Improving scheduled maintenance with imperfect inspections
Jin, L; Koyama, N
Proceedings of the 15th Asian Network for Quality Congress (ANQ 2017), 1-10, Sep. 2017, Peer-reviwed
International conference proceedings, English

Operation and Maintenance Policy with Flexible Load Sharing
Jin, L; Uwano, T; Suzuki K
Proceedings of the 10th International Conference on Mathematical Methods in Reliability (MMR 2017), xx-xx, Jul. 2017, Peer-reviwed, Invited
International conference proceedings, English

Analysis of window-censored repair logs and its application to maintenance
Watalu Yamamoto; Lu Jin; Kazuyuki Suzuki
Theory and Practice of Quality and Reliability Engineering in Asia Industry, Springer Singapore, 291-300, 01 Jan. 2017, Peer-reviwed, When tailor-made systems are introduced into fields, markets, or factories, the replacement parts or subcomponents for maintenance are produced and purchased simultaneously so as to keep the quality and reliability of those parts homogeneous against the parts installed into systems at the beginning. Those parts are then kept in stock at yards and will be kept waiting for their turns. Furthermore, the maintenance records of such systems are often window censored, under which the records are both left and right censored. In this talk, we model such situations as a renewal process with incomplete repairs, in which a failed subcomponent is replaced with an unused-but-not-new subcomponent. The statistical inference of the failure time distribution and the effect of in-stock term are implemented using stochastic EM algorithm, which is needed to solve the maximization problem of the incomplete data likelihood under window censoring. A real case is analyzed using the proposed model and the effect of in-stock-at-yards term on the total lifetime is assessed by assuming Weibull distribution. We also examine the sampling properties of the estimators for Weibull distributions.
In book, English

Adaptive Age Replacement Using On-Line Monitoring
Lu Jin; Watalu Yamamoto
13TH GLOBAL CONGRESS ON MANUFACTURING AND MANAGEMENT, ELSEVIER SCIENCE BV, 174, 117-125, 2017, Peer-reviwed, Invited, Age replacement is one of the most used maintenance policies based on preventive action in order to prevent the failure of a system. Age replacement means that a system is replaced at failure or at a specified replacement age, whichever occurs first. In current age replacement policies, the replacement age is identified without consideration of the effects from operating conditions. However, the lifetime of a system may be affected by various operating conditions, such as the surrounding environment and the operators. In such cases, the replacement age of the system should differ for different situations. Thanks to the improvement of information communication technology, various information about the systems operating conditions can be obtained via the on-line monitoring. This research proposed an adaptive age replacement policy for systems under variable operating conditions using a cumulative exposure model. Based on the on-line information, we proposed a new time-scale instead of the age with consideration of operating conditions. Next, the new time-scale is used to determine the optimal replacement interval which will minimize the average maintenance cost per unit time (also known as cost rate). Some numerical examples are carried out in order to illustrate the proposed adaptive age replacement policy. The optimal age replacement policy considering the operating conditions reduces the total maintenance costs and enhances the effective maintenance plan for systems operating under various conditions. (C) 2017 The Authors. Published by Elsevier Ltd.
International conference proceedings, English

Optimal Maintenance Policy for Deteriorating Systems Under a Variable Environment
Jin, L
Academy of Mathematics and Systems Science, xx, xx, xx-xx, 2017, Invited
Symposium, English

Scheduling imperfect inspections in preventive maintenance of systems with increasing failure rates
Jin, L
電子情報通信学会技術研究報告, 19-24, 2017, Invited
Symposium, English

Optimal Inspection Policy for Scheduled Maintenance of Aging Systems
Jin, L; Yamamoto, W
International Journal of Industrial Engineering: Theory, Applications and Practice, 24, 4, 99-111, 2017, Peer-reviwed
Scientific journal, English

Adaptive Periodic Maintenance Using Cumulative Exposure Model
Jin, L; Yamamoto, W
Proceedings of the 13th Global Congress on Manufacturing and Management (GCMM2016), 1-10, Nov. 2016, Peer-reviwed
International conference proceedings, English

Age replacement policy under Weibull regression model with measurement errors
Jin, L; Yukimoto, Y; Suzuki, K
Proceedings of the 14th Asian Network for Quality Congress (ANQ 2016), 1-10, Sep. 2016, Peer-reviwed
International conference proceedings, English

Maintenance Policies for Multiple-Component Systems under Dependent Markovian Deterioration
Jin, L; Uwano, T; Suzuki, K
Proceedings of The 7th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2016), xx, xx, 194-201, Aug. 2016, Peer-reviwed, Invited
International conference proceedings, English

Optimal control limit policy for age-dependent deteriorating systems under incomplete observations
Lu Jin; Undarmaa Bayarsaikhan; Kazuyuki Suzuki
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART O-JOURNAL OF RISK AND RELIABILITY, SAGE PUBLICATIONS LTD, 230, 1, 34-43, Feb. 2016, Peer-reviwed, The focus of this study is the optimal decision making problem for an age-dependent deteriorating system in which the deterioration unfolds as a non-stationary Markov process. The true deterioration state of the system cannot be known directly and is assumed to be observed incompletely by a monitor that provides information related to the true deterioration state stochastically. The optimal decision making problem is formulated as a partially observable Markov decision process. The optimal maintenance policy is investigated and the structural properties of the resulting optimal expected cost function are obtained. These structural properties establish the existence of an optimal control limit policy with respect to both the deterioration information vector and the age of the system under intuitively meaningful assumptions. The monotonic property of the control limits is also clarified.
Scientific journal, English

Optimal Inspection Policy for Scheduled Maintenance of Aging Systems
Jin, L
The 2nd East Asia Workshop on Industrial Engineering (EAWIE2015), 1-9, Nov. 2015, Peer-reviwed
International conference proceedings, English

Optimal Decision Policy for Deteriorating Systems with On-line Monitoring in a Variable Environment with Selectable Operations
Jin, L
International Journal of Systems Science: Operations & Logistics, xx, xx, 189-199, 11 Aug. 2015, Peer-reviwed
Scientific journal, English

Optimal decision procedure for an operation-dependent deteriorating system
Lu Jin
APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, WILEY-BLACKWELL, 31, 3, 394-404, May 2015, Peer-reviwed, Highly flexible and integrated systems can perform one of several operations at a time, which allows the decision-maker to select which operation to perform in the safest and most effective way. There are strong dynamic interactions between a system's deterioration and the operations it performs. In this research, optimal decision-making was investigated for operation-dependent deteriorating systems under variable operations while formulating the problem as a Markov decision process with the operation as a parameter. The decision-maker selects the operation that will minimize the total expected cost over an infinite horizon on the basis of the current state. The properties of the resulting optimal expected cost function were examined, and the optimal decision procedure was found to be given by a monotone procedure under certain conditions. This research provides a generalization of the keep, inspection, and replacement' problem that was initially introduced by Derman (Mathematical Optimization Techniques: 201-210, 1963) and has been studied extensively since then. Copyright (c) 2014 John Wiley & Sons, Ltd.
Scientific journal, English

Optimal Maintenance Policy for Aging Systems Under Non-stationary Markov Deterioration
Jin, L
Journal of the Japanese Society for Quality Control, The Japanese Society for Quality Control, 45, 4, 65-73, 2015, Peer-reviwed, In most previous studies of maintenance decision-making, systems were assumed to deteriorate in accordance with a stationary state transition law. However, the deterioration of a system sometimes depends on its age (calendar time, total operating time, etc). In this research, optimal maintenance decision-making was investigated for systems with age-dependent deterioration. The problem was formulated as a non-stationary Markov decision process. The properties of the optimal expected cost function were examined, and the optimal maintenance decision-making policy was found to be given by a two-dimensional control limit policy with respect to both the system's deterioration state and age under certain conditions. A numerical example of a power transformer demonstrated that a control limit policy that takes both state and age into consideration is optimal for this system and is also better than the existing maintenance guideline. Such an age-dependent maintenance policy supports the implementation of a system-specific maintenance plan.
Scientific journal, English

Optimal Maintenance Policy for Deteriorating System with On-line Monitoring in Environments and Operating Condition
Jin, L
Proceedings of the 8th International Conference on Mathematical Methods in Reliability: Theory, Methods and Applications (MMR 2015), 1-8, 2015, Peer-reviwed
International conference proceedings, English

Optimal Decision Making Problem for Systems Under Multiple Deteriorating Mechanisms
Jin, L; Kashiwai, K
the 16th Conference of the Applied Stochastic Models and Data Analysis International Society (ASMDA 2015), xx, xx, xx-xx, 2015, Peer-reviwed
International conference proceedings, English

Weakly Monotone Policies for Deteriorating Systems with Multiple Dependent Units
Jin, L; Uwano, T; Suzuki, K
the 13th Asian Network for Quality Congress (ANQ 2015), 1-10, 2015, Peer-reviwed
International conference proceedings, English

On Uncertainty Evaluation Of S-N Curve Estimation
Yamamoto, W; Jin, L
Proceedings of the International Conference on Quality 2014, 906-914, Oct. 2014, Peer-reviwed
International conference proceedings, English

Optimal Decision Policy for Non-Stationary Deteriorating Systems
Jin, L; Bayarsaikhan, U
Proceedings of the International Conference on Quality 2014, 750-761, Oct. 2014, Peer-reviwed
International conference proceedings, English

Optimal Maintenance Policy for Age-dependent Markov Deteriorating Systems under Partially Observation
Jin, L; Bayarsaikhan, U
Proceedings of the 6th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM), 200-207, Aug. 2014, Peer-reviwed
International conference proceedings, English

A Structured Inspection and Replacement Policy For Aging Systems Over An Infinite Horizon
Jin, L; R. P; D. J. Rajapaksha
Proceedings of the International Conference on Reliability, Maintainability and Safety (ICRMS), 1-5, Aug. 2014, Peer-reviwed
International conference proceedings, English

Regression Analysis of Survival Data with a Latent Variable
Yamamoto, W; Jin, L
Proceedings of the 6th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2014), 538-543, Aug. 2014, Peer-reviwed
International conference proceedings, English

Control Limit Policy for Aging Systems Using Markov Decision Process
Jin, L; Bayarsaikhan, U
Proceedings of the 8th IMA International Conference on Modelling in Industrial Maintenance and Reliability (MIMAR), 149-154, Jun. 2014, Peer-reviwed
International conference proceedings, English

Optimal of Monotone Procedure for Monitored Systems Working Under Variable Operations
Jin, L; Suzuki, K
The 8th International Conference on Mathematical Methods in Reliability: Theory, Methods and Applications, 156-160, Jul. 2013
International conference proceedings, English

Optimal Maintenance Policy For Partially Observable Markovian Deteriorating System Subject To A Restorable Varying Environment
Jin, L. Miyawaki, K; Suzuki, K
Journal of Reliability Engineering Association of Japan, Reliability Engineering Association of Japan (REAJ), 35, 3, 177-187, Jun. 2013, Peer-reviwed, An optimal maintenance problem is investigated for a system that deteriorates under the influence of a resettable varying environment. Since the internal true state of the system cannot be observed directly, the decision maker needs to determine the action that will minimize the discounted total expected cost over an infinite horizon by inferring the system's exact state on the basis of the available information, such as the current environment condition, the monitors' observations, and the observed system history. This procedure is formulated as a partially observable Markov decision process (POMDP) with the environment as a parameter. The structural properties of the optimal maintenance policy is studied, and a sufficient condition that ensures the optimality of the control limit policy with respect to the system's prior probability and its environment is identified.
Scientific journal, English

Optimal Policies for Partially Observable Markovian Deteriorating System Subject to Varying Environments
Jin, L; Miyawaki K; Suzuki, K
Proceedings of the Second International Conference on the Interface between Statistics and Engineering, 64-65, Jun. 2012, Peer-reviwed
International conference proceedings, English

Control Limit Policy for Partially Observable Markov Decision Process Based on Stochastic Increasing Ordering
Lu Jin; Kazuhiro Kumagai; Kazuyuki Suzuki
QUALITY TECHNOLOGY AND QUANTITATIVE MANAGEMENT, NCTU-NATIONAL CHIAO TUNG UNIV PRESS, 8, 4, 479-493, Dec. 2011, Peer-reviwed, We investigated an optimal maintenance problem for a condition monitoring system that is formulated as a partially observable Markov decision process. In almost all previous research, the optimal control limit policy with respect to totally positive of order 2 (TP2) ordering of the state probability vectors was derived using the property of posterior probability. We call this approach "Approach PP." Attempts to achieve an optimal control limit policy based on stochastic increasing (SI) ordering, which is weaker than TP2 ordering, ran into a difficulty. That is, the SI property of the posterior probability vectors could not be obtained, and this property is needed to derive results expected using Approach PP. We investigated the conditions for the SI property of posterior probability vectors and derived a necessary and sufficient condition that cannot be further relaxed when we try to derive an optimal control limit policy based on SI ordering using Approach PP. This condition is that the conditional probability matrix of the monitor observation given the state of the system is given as Type 1), the probabilities of the same monitoring output are the same whatever the true state, or Type 2), an identity matrix. Type 1) means that the monitoring output is independent of the true state.
Scientific journal, English

Necessary and Sufficient Condition for Optimal k-out-of-n Structure of Monitoring System with n General Sensors
Jin, L; Suzuki, K
Journal of Reliability Engineering Association of Japan, 32, 89-95, 2011, Peer-reviwed
Scientific journal, English

Necessary and Sufficient Condition for Control Limit Policy on Partially Observable Markov Decision Process
Jin, L; Suzuki, K
Journal of the Japanese Society for Quality Control, The Japanese Society for Quality Control, 42, 2, 238-249, 2011, Online monitoring of the condition of products anywhere in the world has become possible with recent advances in information technology. This enables manufacturers to provide appropriate and effective maintenance service to each customer by using information specific to each product, such as degradation and usage. The investigation of the optimal maintenance policy has thus become important. This research investigated the optimal maintenance policy for a multi-state deteriorated system under the assumption that the system is monitored incompletely by a monitor that gives information related to the true state of the system. The problem was formulated as a partially observable Markov decision process (POMDP). Derman investigated the optimal maintenance problem for a system with complete observations and showed that a state transition probability matrix with the stochastic increasing (SI) property is a sufficient condition for the optimal policy to be given by a control limit policy. Complete observations means that the monitor shows the true internal state of the system; that is, the conditional probability matrix, which describes the relationship between the monitor's output and the internal state of the system, is an identity matrix, which is a special case of the POMDP model. Investigation of the optimal maintenance problem with incomplete observations when the transition probability matrix has the SI property showed that the optimal procedure is given by a control limit policy if and only if the conditional probability matrix is given by (i) an identity matrix or (ii) a matrix in which the probabilities of the same monitoring output are the same whatever the true state. This research brings to a close over have a century of research on ways to extend the optimal control limit policy on the basis of SI ordering of the state probability vectors.
Scientific journal, English

Optimal Maintenance Procedure for Multi-state Deteriorated System with Incomplete Monitoring
Jin, L; Suzuki K
International Journal of Reliability and Applications, 11, 2, 66-87, 2011, Peer-reviwed
Scientific journal, English

Necessary and Sufficient Condition for Control Limit Policy in Partially Observable Markov Decision Process with Stochastic Increasing
Jin, L; Suzuki K
Proceedings of the 7th Asian Network for Quality Congress, 727-736, Sep. 2009, Peer-reviwed
International conference proceedings, English

Optimal allocations for load-sharing k-out-of-n:F systems
Watalu Yamamoto; Lu Jin; Kazuyuki Suzuki
JOURNAL OF STATISTICAL PLANNING AND INFERENCE, ELSEVIER SCIENCE BV, 139, 5, 1777-1781, May 2009, Peer-reviwed, We develop an optimal load allocation for load-sharing k-out-of-n:F systems with piecewise linear degradation models. The components are assumed non-repairable,and they are removed from the system as soon as they fail. It is shown that the lifetime of a system is maximized by allocating the load on a system to its components according to component residual lifetimes. The same allocation can be applied to the systems in which the lifetime distributions of components are known and also in which the lifetime distributions belong to a scale family, by assuming an accelerated lifetime model and the Cumulative damage rule. (C) 2008 Elsevier B.V. All rights reserved.
Scientific journal, English

Optimality of k-out-of-n Structures for Condition Monitoring Maintenance Using Dependent Information
L. Jin; Y. Horikoshi; K. Suzuki
QUALITY TECHNOLOGY AND QUANTITATIVE MANAGEMENT, NCTU-NATIONAL CHIAO TUNG UNIV PRESS, 6, 1, 23-32, Mar. 2009, A maintenance monitoring system is considered that is subject to two types of contradictory failures, "false alarm" and "failure to alarm". It is shown that, for a monitoring system with dependent observations, the optimal decision procedure is given by a k-out-of-n structure under a weaker condition than that used in previous research. The condition is that the ratios of the same size elements of the conditional probabilities for the observational matrix of the monitors given the true state of the observed system are the same besides the probability matrix having a weak-MLR (weak-multivariate monotone likelihood ratio) property. If the optimal procedure is given by a k-out-of-n structure, the amount of calculation time needed to identify an optimal decision procedure can be greatly reduced. This enables an optimal action to be found quickly.
Scientific journal, English

Control Limit Policy for Partially Observable Markov Decision Process (POMDP) Based on Stochastic Increasing
Jin, L; Kumagai K; Suzuki K
Proceedings of ICRMS2007: International Conference on Reliability Maintainability and Safety, 87-92, Aug. 2007, Peer-reviwed
International conference proceedings, English

Optimal Design for a Monitoring System Comprising n Dependent and Non-identical Sensors
Jin, L; Endo, M; Tanaka, K; Suzuki, K
Mathematical Methods in Reliability: Methodology and Practice, 1-12, Jul. 2007, Peer-reviwed
International conference proceedings, English

Optimality of Monotone Procedure in Preventive Maintenance Using Non-independent Monitoring Information
Jin, L; Suzuki, K
Journal of Reliability Engineering Association of Japan, 28, 381-393, 2006, Peer-reviwed
Scientific journal, English

Optimality of k-out-of-n Systems for Condition Monitoring Maintenance Using Dependent Information
Jin, L; Horikoshi, Y; Suzuki, K
Proceedings of the 2006 Asian International Workshop on Advanced Reliability Modeling, 132-141, 2006, Peer-reviwed
International conference proceedings, English

Monotone Procedure for a Three-State Partially Observable Markov Decision Process with Stochastic Increasing Order
Suzuki, K; Kumagai, K; Jin, L
Proc. of The 2nd International Conference on Reliability and Safety Engineering (INCRESE), pp.28-38, 2006, Peer-reviwed
International conference proceedings, English

Monotone Procedure for Multi-state Deteriorated System with Incomplete Monitoring
Jin, L; Ikeda, K; Suzuki, K
Proceedings of the Fourth Asian Network for Quality Congress and the 20th Asia Quality Symposium, QS6, pp.1-10, 2006, Peer-reviwed
International conference proceedings, English

Optimal Design of Load-sharing k-out-of-n System with Degradation Measures
Yamamoto, W; Jin, L; Hasegawa, S; Suzuki, K
Proceedings of the Fourth Asian Network for Quality Congress and the 20th Asia Quality Symposium, QS8, pp.1-6, 2006, Peer-reviwed
International conference proceedings, English

Necessary and Sufficient Condition for Optimality of Monotone Procedure in Condition Monitoring Maintenance with General Number of Actions
Jin, L; Suzuki, K
Journal of the Japanese Society for Quality Control, 35, 299-311, Feb. 2005, Peer-reviwed
Scientific journal, English

An optimal policy for partially observable Markov decision processes with non-independent monitors
Lu Jin; Tomoaki Mashita; Kazuyuki Suzuki
Journal of Quality in Maintenance Engineering, 11, 3, 228-238, 2005, Peer-reviwed, Purpose - This research investigated the optimal structure of a discrete-time Markov deterioration system monitored by multiple non-independent monitors. The purpose is to obtain a sufficient condition with which the optimal policy is given by a control limit policy. Design/methodology/approach - The model of this research is formulated as a partially observable Markov decision process. The problem is to obtain an optimal policy which can minimize the expected total discounted cost over an infinite horizon. Findings - The research found that the expected optimal cost function over an infinite horizon has a property of control limit policy given the conditions that a transition probability having a property of totally positive of order 2 and a conditional probability of the monitors having a property of weak multivariate monotone likelihood ratio. Furthermore, we showed that the optimal policy has only four action regions at most. Practical implications - If the optimum policy can be limited to a control limit policy, the tremendous amount of calculation time required to find the optimum procedure can be reduced. This enables the best decision to be identified in a much shorter period of time. Originality/value - A deterioration system monitored incompletely by one monitor has been studied in the previous research. This research considered the case of a multiple number monitors whose observations were not independent. © Emerald Group Publishing Limited.
Scientific journal, English

Optimal Decision for Preventive Maintenance Using Multiple Reliability Information
Suzuki, K; Jin, L
Fourth International Symposium on Business and Industrial Statistics, xx-xx, 2005, Peer-reviwed
International conference proceedings, English

Optimal Policy for Condition Monitoring Maintenance and its Relationship with Discriminant Analysis
Suzuki, K; Jin, L
Proceedings the Thirteenth International Conference on Quality, VI-18, pp.1-12, 2005, Peer-reviwed
International conference proceedings, English

Optimal Decision Procedure for Safety Monitoring Systems
Suzuki, K; Jin, L
IEEE Asian Reliability Conference 2005, xx-xx, 2005, Peer-reviwed
International conference proceedings, English

An optimal policy for partially observable markov decision processes with non-independent monitors
L Jin; T Mashita; K Suzuki
ADVANCED RELIABILITY MODELING, WORLD SCIENTIFIC PUBL CO PTE LTD, 213-220, 2004, Peer-reviwed, We developed a discrete-time Markovian deterioration system monitored by multiple non-independent monitors, and derive a sufficient condition where an optimum policy is given by a "control limit policy." This condition is given by the conditional probability of monitors given the state of a system having a weak multivariate monotone likelihood ratio.
International conference proceedings, English

Optimal Preventive Maintenance Using Dependent Reliability Information
Suzuki, K; Jin, L
xx-xx, 2004, Peer-reviwed
International conference proceedings, English

Optimal Preventive Maintenance with an Application of TP2
Jin, L; Suzuki, K
Proceedings of the First Asian Network for Quality Congress and the 17th Asia Quality Symposium, 1146-1151, 2003, Peer-reviwed
International conference proceedings, English

私の提言～学会のダイバーシティについて～
金路
2018, 日本品質管理学会誌「JSQCニュース」, 336, 1-1, Japanese, Introduction scientific journal

劣化システムの保全計画
金 路
日本信頼性学会, 2017, 信頼性, 39, 3, 139-147, Japanese, Invited, Introduction scientific journal

ルポルタージュ ANQ Congress 2015 Taipeiに参加して
金 路
日本品質管理学会, 2016, 日本品質管理学会誌「品質」, 46, 2, 185-187, Japanese, Invited, Introduction other, 0386-8230, 40020818381, AN00354769

日本にしかないおもてなしの品質・おもてなしのサービス
日本品質管理学会, Jul. 2015, 品質, 45, 3, 30-35, Japanese, Invited, Introduction scientific journal

変動要因による非定常劣化モデルにおける最適保全方策
日本品質管理学会, May 2015, 品質, 45, 2, 39-43, Japanese, Invited, Introduction scientific journal

変動要因による非定常劣化モデルにおける最適保全方策
金 路
2015, 日本品質管理学会誌「品質」, 45, 2, 39-43, Japanese, Introduction scientific journal

日本にしかないおもてなしの品質・おもてなしのサービス
フランク・ビョーン; 金 路; 翁 嘉華; 臧 巍; 杉原 健治; 立林 和夫
2015, 日本品質管理学会誌「品質」, 45, 30-35, Japanese, Others

状態監視保全における保全方策決定とその最適性
金路
日本信頼性学会, 2014, 信頼性, 36, 3, 139-147, Japanese, Invited, Introduction scientific journal

状態監視保全における保全方策決定とその最適性
金 路
Reliability Engineering Association of Japan (REAJ), 2014, 日本信頼性学会誌「信頼性」, 36, 3, 139-147, Japanese, Introduction scientific journal, 0919-2697, 110009818800, AN10540883

Optimal maintenance policy for a two-state system with population heterogeneity under partial observation
M. Kasuya; L. Jin
Chapter 18, Demography book (Skiadas & Skiadas as co-editors) published by Springer, Jun. 2023

Data analysis and application
Takada; K. Dimitrov; M. Jin, L; Ying, N
Scholarly book, English, Joint work, American Option Pricing under a varying economic situation using a semi-Markov decision process, Wiley, Oct. 2021

Vol. 1. Stochastic Processes, Statistical Methods, and Engineering Mathematics
Jin, L; Dimitrov, M; Ni, Y
Chaper 6, pp 121–144, Ed. by Malyarenko, A., Ni, Y. and Rančić, M., Springer,, 2021

Approximate Log-Linear Cumulative Exposure Time Scale Model by Joint Moment Generating Function of Covariates
Yamamoto, W; Jin, L
Others, English, Joint work, pp. 327-339, Springer, 2018

Adaptive Age Replacement Using On-Line Monitoring
Jin, L; Yamamoto, W
Joint work, Vol.174, pp. 117–125, Procedia Engineering, 2017

Theory and Practice of Quality and Reliability Engineering in Asia Industry
W. Yamamoto; L. Jin; K. Suzuki
Scholarly book, English, Contributor, Analysis of Window Censored Repair Logs and its Application to Maintenance, Springer, 2017

Optimal Inspection Policy for Scheduled Maintenance of Markovian Deteriorating Systems
Jin, L
English, Joint work, Statistical, Stochastic and Data Analysis Methods and Applications. Chapter 6 Reliability, 2016

日本信頼性学会編 新版 信頼性ハンドブック
金路
Japanese, Joint work, 第3章12節 保全の理論（Ⅱ）, 日科技連出版社, Apr. 2014

新版 信頼性ハンドブック
益田 昭彦; 金 路
付録8 信頼性用語対応外国語一覧, 付録pp. 1-15, 日本信頼性学会編, 日科技連出版社, 2014

Maintenance Policy for Multi-unit Redundant Systems with Two Types of Opportunities
Zirui Wang; Lu Jin; Watalu Yamamoto
Oral presentation, English, The 7th Asian Conference of Management Science and Applications., Peer-reviewed
16 Dec. 2023
15 Dec. 2023- 17 Dec. 2023

EICに基づく加速寿命時間モデルの選択
脇本拓海; 山本渉, 金路
日本品質管理学会第53回年次大会研究発表, Peer-reviewed
11 Nov. 2023
10 Nov. 2023- 11 Nov. 2023

劣化がウィーナー過程に従うシステムの最適保全方策 ∼スペアユニット母集団の異質性と状態の部分観測を考慮する場合∼
糟谷瑞希; 金路
Japanese, 日本品質管理学会第53回年次大会研究発表
11 Nov. 2023
10 Nov. 2023- 11 Nov. 2023

修理を考慮した k-out-of-n システムにおける状態監視保全の最適方策の性質に関する研究
池野谷奏太; 金路
Japanese, 日本品質管理学会第53回年次大会研究発表
11 Nov. 2023
10 Nov. 2023- 11 Nov. 2023

Model Selection for Accelerated Life Test Model Using Extended Information Criterion
Takumi Wakimoto; Watalu Yamamoto; Lu Jin
Oral presentation, English, The 5th International Conference on System Reliability and Safety Engineering, Peer-reviewed
22 Oct. 2023
20 Oct. 2023- 23 Oct. 2023

Structural Inspection and Maintenance Policies for Partially Observable Systems with Three Deterioration States
Tetsuya Abe; Lu Jin
Oral presentation, English, The 5th International Conference on System Reliability and Safety Engineering, Peer-reviewed
22 Oct. 2023
20 Oct. 2023- 23 Oct. 2023

Conditions for monotone maintenance policy in partially observable Markovian systems with population heterogeneity
Mizuki Kasuya; Lu Jin
Oral presentation, English, The 13th International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE2023), Peer-reviewed
27 Jul. 2023
26 Jul. 2023- 29 Jul. 2023

Optimal policy for condition-based maintenance
Lu Jin
Keynote oral presentation, English, The 13th International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE2023), Invited
27 Jul. 2023
26 Jul. 2023- 29 Jul. 2023

Some properties on optimal maintenance policies for k-out-of-n:G systems with imperfect repair
Sota Ikenoya; Lu Jin
Invited oral presentation, English, The 20th Conference of the Applied Stochastic Models and Data Analysis International Society (ASMDA2023), Invited, Peer-reviewed
07 Jun. 2023
06 Jun. 2023- 09 Jun. 2023

Optimal age-replacement policy for series systems considering parameter uncertainty
Kentaro Fujioka; Ying Ni; Lu Jin
Invited oral presentation, English, The 20th Conference of the Applied Stochastic Models and Data Analysis International Society (ASMDA2023), Invited, Peer-reviewed
07 Jun. 2023
06 Jun. 2023- 09 Jun. 2023

Condition-based Maintenance for Deteriorating Systems with Population Heterogeneity under Partial Observation
Mizuki Kasuya; Lu Jin
Invited oral presentation, English, The 12th International Conference on Mathematical Methods in Reliability (MMR 2023), Invited, Peer-reviewed
01 Jun. 2023
30 May 2023- 02 Jun. 2023

Optimal preventive and opportunistic maintenance policy for Semi-Markovian Deteriorating Systems
Zirui Wang; Watalu Yamamoto; Qingpei Hu; Lu Jin
Invited oral presentation, English, The 12th International Conference on Mathematical Methods in Reliability (MMR 2023), Invited, Peer-reviewed
01 Jun. 2023
30 May 2023- 02 Jun. 2023

Statistical modeling for multivariate degradation data with correlated random effects
Qifang Liu; Qingpei Hu; Lu Jin; Dan Yu
Invited oral presentation, English, The 12th International Conference on Mathematical Methods in Reliability (MMR 2023), Invited, Peer-reviewed
01 Jun. 2023
30 May 2023- 02 Jun. 2023

部分観測可能な4状態劣化システムにおける閾値型保全方策に関する研究
阿部哲也; 金路
Oral presentation, Japanese, 日本品質管理学会第131回研究発表会
27 May 2023

経済的リスクを考慮した直列システムの最適な取替周期に関する研究
藤岡健太郎; 金路
Oral presentation, Japanese, 日本品質管理学会第131回研究発表会
27 May 2023

Optimal Replacement Policy of a Two-Unit System Considering Opportunistic Maintenance
Zirui Wang; 山本渉, 金路
Oral presentation, English, 第52回年次大会研究発表会, Domestic conference
Nov. 2022

誤報と欠報が発生する不完全点検と完全点検を併用した保全 計画の最適化に関する研究
泉脇颯, 金路; 山本渉
Oral presentation, Japanese, 日本品質管理学会第128回研究発表会研究発表要旨集, Domestic conference
May 2022

k-out-of-3システムにおける状態監視保全のコントロールリミットポリシーに関する研究
池野谷奏太; 金路
Oral presentation, Japanese, 日本品質管理学会第128回研究発表会研究発表要旨集 2022., Domestic conference
May 2022

部分的な観測の下で母集団の不均質性を考慮した 2 状態システムの最適保全方策，
糟谷瑞希; 金路
Oral presentation, Japanese, 日本品質管理学会第128回研究発表会, 研究発表要旨集, Domestic conference
May 2022

Condition-based maintenance considering random opportunities under continuous-time Markov decision process
Wang, Zirui; Yamamoto, Watalu; Jin, L
Invited oral presentation, English, The 3rd International Conference on System Reliability and Safety Engineering (SRSE 2021), Peer-reviewed, International conference
Nov. 2021

Optimal policy for condition-based maintenance at both scheduled and unscheduled opportunities
Wang, Zirui; Yamamoto; Watalu; Jin, L
Invited oral presentation, English, The 3rd International Conference on System Reliability and Safety Engineering (SRSE 2021), Invited, Peer-reviewed, International conference
Oct. 2021

Optimal condition-based maintenance for a deteriorating system with unscheduled maintenance opportunities
Wang, Zirui; Jin, L
Oral presentation, English, The 11th International Conference on Modelling in Industrial Maintenance and Reliability (MIMAR), Peer-reviewed, International conference
Jul. 2021

Pricing for American option using a semi-Markov decision process
Takada; K. Dimitrov; M. Jin, L; Ying, N
Invited oral presentation, English, the 19th Conference of the Applied Stochastic Models and Data Analysis International Society (ASMDA2021), Invited, Peer-reviewed, International conference
Jun. 2021

２つのユニットからなる負荷分散システムにおける負荷配分と保全の同時最適化
芦澤諒哉; 金路
Oral presentation, Japanese, 日本品質管理学会125回研究発表会, Domestic conference
29 May 2021

保全時間を考慮する場合のマルチユニットシステムの最適な取替周期に関する研究
藤岡健太郎; 金路
Oral presentation, Japanese, 日本品質管理学会125回研究発表会, Invited, Domestic conference
29 May 2021

Properties of American-type Options under a Markovian Regime-Switching Model
Marko Dimitrov; Lu Jin; Ying Ni
Invited oral presentation, English, International Virtual Conference and Demographics2020 Workshop (SMTDA2020), Invited, Peer-reviewed, International conference
03 Jun. 2020

累積ショック量を考慮した劣化システムの予防保全
的場翔馬; 金路
Oral presentation, Japanese, 日本品質管理学会第49回研究発表会, Domestic conference
Nov. 2019

Optimal Maintenance Policy Including Inspections and Condition Monitoring with Multiple Sensors,
Jin, L
Invited oral presentation, English, the 11th International Conference on Mathematical Methods in Reliability (MMR 2019), Peer-reviewed, International conference
Jun. 2019

変化する環境要因を考慮したマルチユニットシステムの機会保全に関する研究
小田嶋優; 金路
Oral presentation, Japanese, 日本品質管理学会第49回研究発表会要旨集, Domestic conference
27 May 2019

Opportunistic Maintenance Policy for Multi-unit System under Markovian Environment Changes
Odajima, Y; Jin, L
Invited oral presentation, English, The 5th International Conference on the Interface between Statistics and Engineering (ICISE 2019), Invited, Peer-reviewed, International conference
May 2019

工学部教育におけるシステム信頼性実験の設計
金路
Oral presentation, Japanese, 日本品質管理学会第48回研究発表会, 日本品質管理学会, Domestic conference
Nov. 2018

精度の異なるモニタを用いる状態監視保全に関する研究
金路
Poster presentation, Japanese, 第9回横幹連合コンファレンス, 第9回横幹連合コンファレンス, 日本語, Domestic conference
06 Oct. 2018

故障率増加型システムにおける複合的な点検計画に関する研究
金路, 山本渉
Oral presentation, Japanese, 第48 回信頼性・保全性シンポジウム発表報文集, Peer-reviewed, Domestic conference
Jul. 2018

故障率増加型システムにおける複合的な点検計画に関する研究、
金路, 山本渉
Oral presentation, Japanese, 第48 回信頼性・保全性シンポジウム発表報文集, Domestic conference
Jul. 2018

モニタリングを活用した点検計画と保全方策の最適化について
雪本泰久; 金路
Oral presentation, Japanese, 日本品質管理学会第47回研究発表会, Domestic conference
15 Nov. 2017

Optimal Maintenance Policy for Deteriorating Systems Under a Variable Environment
Jin, L
Public discourse, English, Invited, Academy of Mathematics and Systems Science, Malardalen University, Sweden
20 Aug. 2017

故障率増加システムの予防保全における不完全点検の併用に関する研究
金路
Oral presentation, English, 電子情報通信学会信頼性研究会, Invited, Domestic conference
16 Jun. 2017

オンコンディション保全のための不完全点検の併用に関する研究
小山 尚晃; 路
Oral presentation, Japanese, 日本品質管理学会第46回研究発表会, Domestic conference
27 May 2017

マルコフ決定過程に基づくマルチユニットシステムの最適保全方策,
金 路
Invited oral presentation, Japanese, 待ち行列シンポジウム予稿集, Invited, Domestic conference
Jan. 2017

Adaptive Maintenance Strategy for Deterioration System with Scheduled Maintenance, Academy of Mathematics and Systems Science
Lu Jin
Public discourse, English, Chinese Academy of Sciences
26 Dec. 2016

完全点検と不完全点検を併用した複合的な保全計画に関する研究
小山 尚晃; 金
Oral presentation, Japanese, 日本品質管理学会第46回研究発表会, Domestic conference
Nov. 2016

A MGF Based Approximation to Cumulative Exposure Models
W. Yamamoto; L. Jin
Invited oral presentation, English, XIth International Workshop on Intelligent Statistical Quality Control 2016, International conference
Aug. 2016

オンラインモニタリングによる予防保全のための最適方策の理論体系
金 路; 鈴木 和幸
Oral presentation, Japanese, 情報システム学研究科シンポジウム 第20回「信頼性とシステム安全学」予稿集
01 Mar. 2016

オンライン状態監視を用いた最適保全方策の理論, pp.42-47, 2016
金 路; 鈴木 和幸
Oral presentation, Japanese, 第46回信頼性・保全性シンポジウム発表報文集, Domestic conference
2016

オン・コンディション保全の不確実性を考慮した最適点検計画
越智優一; 金 路; 鈴木 和幸
Oral presentation, Japanese, 日本品質管理学会第110回研究発表会, 研究発表要旨集
2016

複数のメカニズムによる劣化システムの部分的な観測に基づく保全方策
上野 智史; 金 路; 鈴木 和幸
Oral presentation, Japanese, 第28回秋季信頼性シンポジウム発表報文集, 日本信頼性学会, 東京, Domestic conference
Dec. 2015

Flexible Maintenance Strategy for Markov Deterioration System with Scheduled Maintenance,
Jin, L
Others, English, Ewha Womans University Seoul, Korea, Seoul, Korea, International conference
Nov. 2015

オン・コンディション保全における最適な点検間隔に関する研究
柏井宏太; 金路; 鈴木和幸
Oral presentation, Japanese, 情報システム学研究科シンポジウム 第19回「信頼性とシステム安全学」予稿集
2015

Flexible Maintenance Strategy for Markov Deterioration System with Scheduled Maintenance
Invited oral presentation, English, Ewha Womans University Seoul, Korea, International conference
2015

複数の故障メカニズムを考慮した劣化システムにおける単調方策
上野 智史; 金 路; 鈴木 和幸
Oral presentation, Japanese, 第23回春季信頼性シンポジウム
2015

エイジングシステムにおける最適な点検間隔に関する研究
小山 尚晃; 柏井 宏太; 金 路; 鈴木 和幸
Oral presentation, Japanese, 第23回春季信頼性シンポジウム
2015

複数の故障メカニズムを考慮した劣化システムの保全方策に関する一考察
上野 智史; 金 路; 鈴木 和幸
Oral presentation, Japanese, 第45回信頼性・保全性シンポジウム発表報文集
2015

Optimal Operation Selection Policy for Deteriorating Systems with On-line Monitoring in a Variable Environment
Jin, L; Rajapaksha; R. P. D. J
Oral presentation, English, 第45回信頼性・保全性シンポジウム
2015

Condition Monitoring Maintenance for Non-stationary Deteriorating Systems
Jin. L
Invited oral presentation, English
30 May 2014

Control Limit Policy for Non-stationary Deteriorating Systems
Bayarsaikhan, U; Jin, L
Oral presentation, English, 情報システム学研究科シンポジウム 第18回「信頼性とシステム安全学」予稿集, Domestic conference
27 Feb. 2014

オンライン状態監視システムのための信頼性ビッグデータ解析
後藤 卓哉; 関口 拓希; 山本 渉; 石田 勉; 金 路; 鈴木 和幸
Oral presentation, Japanese, 情報システム学研究科シンポジウム 第18回「信頼性とシステム安全学」予稿集, Domestic conference
27 Feb. 2014

S-N曲線の推定について
山本 渉; 金 路
Oral presentation, Japanese, 情報システム学研究科シンポジウム 第18回「信頼性とシステム安全学」予稿集, Domestic conference
27 Feb. 2014

季節変動のある寿命データにおける個別リスクコミュニケーション
片山 航; 平賀 拓磨; 石田 勉; 山本 渉; 金 路; 鈴木 和幸
Oral presentation, Japanese, 情報システム学研究科シンポジウム 第18回「信頼性とシステム安全学」予稿集, Invited, Domestic conference
27 Feb. 2014

オンライン状態監視システムのための信頼性ビッグデータ解析
後藤 卓哉; 関口 拓希; 山本 渉; 石田 勉; 金 路; 鈴木 和幸
Oral presentation, Japanese, 情報システム学研究科シンポジウム 第18回「信頼性とシステム安全学」予稿集, Domestic conference
27 Feb. 2014

Control Limit Policy for Non-stationary Deteriorating Systems
Bayarsaikhan, U; Jin, L
Oral presentation, English, 情報システム学研究科シンポジウム 第18回「信頼性とシステム安全学, Domestic conference
27 Feb. 2014

Optimal Keep and Replacement Policy for Non-Stationary Markov Deteriorating Systems
Jin, L; Bayarsaikhan, U; Suzuki, K
Oral presentation, English, 第22回春季信頼性シンポジウム、発表報文集, Domestic conference
2014

季節変動のある寿命データの解析におけるユーザー個別の情報の活用方法に関する一考察
片山航; 平賀拓磨; 山本渉; 石田勉; 金路; 鈴木和幸
Oral presentation, Japanese, 第22回春季信頼性シンポジウム, Domestic conference
2014

季節変動のある寿命データの解析におけるユーザー個別の情報の活用方法に関する一考察
片山航; 平賀拓磨; 山本渉; 石田勉; 金路; 鈴木和幸
Oral presentation, Japanese, 第22回春季信頼性シンポジウム, Domestic conference
2014

オンライン状態監視による個別保全活動への一考察
関口拓希; 後藤卓哉; 山本渉; 石田勉; 金路; 鈴木和幸
Oral presentation, Japanese, 第22回春季信頼性シンポジウム,発表報文集, Domestic conference
2014

非定常な計数過程データの時間尺度について
小林壮大; 山本渉, 金路; 鈴木和幸
Oral presentation, Japanese, 日本品質管理学会第104 回研究発表予稿集, Domestic conference
2014

RCMにおけるオン・コンディション保全とコンディション・モニタリング保全への一考察
柏井宏太; 金路; 鈴木和幸
Oral presentation, Japanese, 第27回秋季信頼性シンポジウム、発表報文集
2014

複数の故障メカニズムを考慮した状態監視と最適保全方策
上野智史; 金路; 鈴木和幸
Oral presentation, Japanese, 第27回秋季信頼性シンポジウム、発表報文集
2014

Monotone Policy on Decision Making for Non-stationary Deteriorating Systems
Jin, L
Invited oral presentation, English, 日本オペレーションズ・リサーチ学会 信頼性研究会, Domestic conference
2014

Optimal Decision Policy for Markovian Aging Systems
Bayarsaikhan, U; Jin, L
Oral presentation, English, 日本信頼性学会,日本信頼性学会第26回秋季信頼性シンポジウム 発表報文集
Nov. 2013

Optimal of Monotone Procedure for Monitored Systems Working Under Variable Operations
Jin, L; Suzuki, K
Invited oral presentation, English, The 8th International Conference on Mathematical Methods in Reliability: Theory, Methods and Applications, Invited, Stellenbosch, South Africa, International conference
06 Jul. 2013

Optimal Policy For A Deteriorating System With Incomplete Observations Under A Controllable Varying Environment
Jin, L; Suzuki, K
Oral presentation, English, 日本信頼性学会第25回秋季信頼性シンポジウム
2012

外部環境を考慮した状態監視保全における最適保全方策とControl Limit Policy
北之園史郎; 金路; 鈴木和幸
Oral presentation, Japanese, 日本信頼性学会第25回秋季信頼性シンポジウム
2012

k-out-of-n型監視方策の最適性
堀越雄太; 金路; 鈴木和幸
Oral presentation, Japanese, 日本信頼性学会第20回秋季信頼性シンポジウム
2008

独立でないモニターを用いたk-out-of-n 論理構成の最適性
遠藤将則; 金路; 鈴木和幸
Oral presentation, Japanese, 情報システム学研究科シンポジウム 第11回「信頼性とシステム安全学」
2007

Sufficient Conditions for Optimal Control Limit Policy with Respect to Stochastic Increasing Ordering
Kumagai, K; Jin, L; Suzuki, K
Oral presentation, English, 日本品質管理学会第83回研究発表会
2007

独立でないモニターを用いたk-out-of-nシステムの最適性
堀越雄太; 遠藤将則; 金路; 鈴木和幸
Oral presentation, Japanese, 日本信頼性学会第15回春季信頼性シンポジウム
2007

Optimal Condition Monitoring Maintenance --Both Independent and Dependent Cases of Monitors’ Observations--, Joint Seminar Center for Quality Service
Jin, L
Invited oral presentation, English, Chinese Academy of Sciences, Chinese Academy of Sciences
2007

Necessary and Sufficient Condition for Optimality of Monotone Procedure in Condition Monitoring Maintenance
Jin, L
Others, English, Joint Seminar of Centre for Design Technology, Faculty of Engineering, NUS (National University of Singapore) and IEEE Engineering Management Society, Singapore Chapter
2006

POMDPモデルを用いた最適保全方策に関する一考察
熊谷和宏; 金路; 鈴木和幸
Oral presentation, Japanese, 日本信頼性学会第19回秋季信頼性シンポジウム
2006

状態推移を考慮したシステムの最適保全方策に関する一考察
池田健太郎; 金路; 鈴木和幸
Oral presentation, Japanese, 日本信頼性学会第14回春季信頼性シンポジウム
2006

独立でないモニターを用いた状態監視保全におけるk-out-of-n型方策の最適性
堀越雄太; 金路; 鈴木和幸
Oral presentation, Japanese, 日本信頼性学会第14回春季信頼性シンポジウム
2006

An Optimal Policy for Monotone Procedure Based on Bivariate Normal Distribution
Jin, L; Suzuki, K
Oral presentation, English, 日本品質管理学会第35回年次大会研究発表会
2005

Effective Use of Condition Monitoring Using Multiple Sensors
Jin, L; Suzuki, K
Oral presentation, English, 第35回信頼性・保全性シンポジウム
2005

多変量正規分布に基づく最適状態監視保全
熊谷和宏; 金路; 鈴木和幸
Oral presentation, Japanese, 日本品質管理学会第77回研究発表会
2005

Roles of Weak-MLR (Weak Multivariate Monotone Likelihood Ratio) in Preventive Maintenance and Its Relationship with Multivariate Analysis
Jin, L; Kumagai, K; Suzuki, K
Oral presentation, English, 情報システム学研究科シンポジウム 第9回「信頼性とシステム安全学」
2005

Application of Weak Multivariate Likelihood Ratio for Optimal Condition Monitoring Maintenance
Jin, L; Suzuki, K
Oral presentation, English, 日本信頼性学会第17回秋季信頼性シンポジウム
2004

Necessary and Sufficient Condition for Monotone Procedure in Preventive Maintenance with Multi- monitors
Jin, L; Suzuki, K
Oral presentation, English, 第12回日本信頼性学会発表会
2004

独立でないモニターを用いた最適状態監視保全に関する一考察
間下智亮; 金路; 鈴木和幸
Oral presentation, Japanese, 第12回日本信頼性学会発表会
2004

Necessary and Sufficient Condition for Monotone Procedure in Preventive Maintenance When Observations are not Independent
Jin, L; Suzuki, K
Oral presentation, English, 電子情報通信学会信学技報
2004

Technical English
Apr. 2022 - Present
The University of Electro-Communications

信頼性システム特論
Apr. 2021 - Present
東海大学

確率統計
Apr. 2019 - Present
The University of Electro-Communications

品質管理第一
Apr. 2016 - Present
The University of Electro-Communications

品質管理第二
Apr. 2016 - Present
The University of Electro-Communications

Probability Theory
Apr. 2023
The University of Electro-Communications

総合情報学基礎
Apr. 2019 - Mar. 2022
The University of Electro-Communications

K課程卒研輪講
電気通信大学

確率論統計学 e-Learning データアントレプレナーフェローシッププログラム
The University of Electro-Communications

確率論統計学 e-Learning データアントレプレナーフェローシッププログラム
電気通信大学

確率論統計学 e-Learning データアントレプレナーフェローシッププログラム
The University of Electro-Communications

品質管理第二
電気通信大学

確率統計
The University of Electro-Communications

品質管理第一
The University of Electro-Communications

経営・社会情報学実験
The University of Electro-Communications

経営・社会情報学実験
電気通信大学

情報領域演習第二 確率論演習
The University of Electro-Communications

大学院技術英語
The University of Electro-Communications

確率統計
The University of Electro-Communications

経営情報学実験
The University of Electro-Communications

情報領域演習第二 確率論演習
The University of Electro-Communications

情報領域演習第二 確率論演習
電気通信大学

大学院技術英語
The University of Electro-Communications

大学院技術英語
電気通信大学

技術英語
The University of Electro-Communications

技術英語
電気通信大学

The advanced theory of reliability engineering
The University of Electro-Communications

システム信頼性特論
電気通信大学

基礎科学実験（物理学実験）
The University of Electro-Communications

基礎科学実験（物理学実験）
電気通信大学

経営情報学実験
The University of Electro-Communications

経営情報学実験
電気通信大学

Quality and Realibility Engineering: The Japanese Way
The University of Electro-Communications

Quality and Realibility Engineering: The Japanese Way
The University of Electro-Communications

システム工学実験
The University of Electro-Communications

システム工学実験
電気通信大学

日本信頼性学会

日本品質管理学会

IEEE

日本オペレーションズ・リサーチ学会

電子情報通信学会

日本保全学会

信頼性・安全性トラブル未然防止へのモバイルIoTモニタリングシステムの開発と展開
鈴木 和幸; 伊藤 誠; 金 路; 津本 周作; 椿 広計; 長塚 豪己; 横川 慎二; 横山 真弘; 田中 健次
日本学術振興会, 科学研究費助成事業 基盤研究(B), 電気通信大学, 基盤研究(B), Coinvestigator, １．未然防止予測七視点・ホワイトモード WMの探求：昨年度までの製品安全，輸送システム，医療安全の三分野に加え、コロナ感染阻止に関する社会品質に関しその品質要素の検討、ブラックモードとホワイトモードWMの抽出の検討を行い、未然防止予測七視点を深化させた． 2．信頼・安心へのスキーム構築とシーソモデルによる動機付け方法の検討：Withコロナへの社会品質確立を目的に、米国50州とワシントンDC特別区の陽性者数・死亡者数データを基にマスク着用の効果（論文[1]）、ならびにワクチン接種効果の分析を行なった（論文[1],論文[4]）．また、行動分析学の視点から、ワクチン接種に関する効果と副反応、マスク着用への効果と手間・慣習の打破に関し考察を行い、シーソモデル七視点の深化を図り、行動変容への仮説を構築した． 3．未然防止予測七視点に基づくモバイルIoTモニタリングシステムの企画・構想：S化学工業(株)の建築労災事例の分析を行い，ルール不遵守による労災が過半数を占めることをつきとめ、これを打破するべくIoTの活用とともに行動分析学の視点より考察を行った．その結果、現場巡視やモバイルチャット管理において、現状の監督者への「指示をしたか」から「指示後、行動観察しアクションしたか」の活動へのレベルアップが重要であるとの仮説を構築した． 4．新型コロナ感染拡大防止に向けての応用と深化：COVID-19の感染拡大防止に向け，上記１．2．の分析に基づき、信頼・安心へのスキームの3つの七視点からの検討を継続した．, 20H02387
Apr. 2020 - Mar. 2025

高信頼性・安全性システムのためのオンライン状態監視に基づく動的な保全計画
金路
Principal investigator
Apr. 2017 - Mar. 2022

リスクモードとオンラインモニタリング技術高度化に着目した未然防止体系の新展開
鈴木和幸
Apr. 2015 - Mar. 2020

Optimal maintenance policy for non-stationary deteriorating systems subject to varying factors
JIN LU
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), The University of Electro-Communications, Grant-in-Aid for Young Scientists (B), Principal investigator, This project investigates the optimal maintenance decision-making problem for deteriorating systems operating in a variable environment with selectable operations. Since there are strong dynamic interactions among a deteriorating system, its surrounding environment, and the operation being executed, this project formulates the optimal decision-making problem for this system as a non-stationary Markov decision process. The structural properties of the resulting optimal expected cost function are examined, and the optimal maintenance policy is found to be given by a control limit policy under certain conditions. Based on the obtained control limit structure, an algorithm is provided for searching the optimal maintenance policy for a deterioration system under a varying environment. Such maintenance policy enhances the dynamic decision-making process for deteriorating systems operating in a variable environment, and supports the implementation of a system-specific maintenance plan., 25750121
Apr. 2013 - Mar. 2017

Research and Development on Next-Generation Quality and Reliability Information System
SUZUKI Kazuyuki; TANAKA Kenji; ITOH Makoto; YAMAMOTO Watalu; JIN Lu; YOKOYAMA Masahiro; TSUBAKI Hiroe; NAGATSUKA Hideki; YOKOGAWA Shinji
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), The University of Electro-Communications, Grant-in-Aid for Scientific Research (A), Coinvestigator, Outline of Research Findings The purpose of this study is to create the standard manufacturing process for high quality and high reliability products, based on Next-Generation QRIS (Quality and Reliability Information System) combining and utilizing the knowledge of quality control, reliability engineering, and advanced information and communication technology. Throughout this study, we aim the following matters: ①To ensure reliability and safety by improving the accuracy of personalized risk communication to individual customer. ②To establish the prevention system for troubles related to quality and reliability, focused on hazard, failure mode, top event mode, and effect. ③To renovate reliability engineering with the trends of the information age., 22241038
Apr. 2010 - Mar. 2015

Optimal Procedure for Condition Monitoring Maintenance
JIN Lu
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), The University of Electro-Communications, Grant-in-Aid for Young Scientists (B), Principal investigator, This research investigated an optimal maintenance problem with incomplete observations and showed that, when the transition probability matrix (P) has the stochastic increasing (SI) property, the optimal procedure is given by a monotone procedure if and only if the conditional probability matrix (Γ) is given by an identity matrix. This research brings to a close over 50 years of research on ways to extend the optimality of monotone procedure on the basis of SI ordering of the state probability vectors. Furthermore, this research studied the optimal structure identification problem for a monitoring system with multiple sensors and identified a necessary and sufficient condition under which a k-out-of-n structure is optimal in terms of minimizing the expected risk. This means that, fewer structures need to be considered when searching for the optimal one., 19710125
2007 - 2010

Acquisition, Sharing and Utilization of Information for Preventing Quality and Safety Problems
SUZUKI Kazuyuki; TANAKA Kenji; YAMAMOTO Wataru; JIN Lu
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), The University of Electro-Communications, Grant-in-Aid for Scientific Research (C), Coinvestigator, Results are summarized into the following four categories: 1. System for Prevention of Quality and Safety Problems and Their Organization and Management Factors To prevent quality and reliability problems, a system which consists of seven steps is proposed and the importance of the following organizational and management factors is discussed : (1) Quality FLEA, Customer First Principle, (2) Culture which Can Open Problems, (3) Adaptation for Change, (4) Information Sharing and Communication, (5) Confidence on Each Member, (6) Ethics, Engineering and Education, (7) CSR Consciousness. 2. Accumulation of Stress-Failure mechanism-Failure modes and its information sharing If one cannot predict a risk in future, one cannot prevent it. Therefore, prevention based on prediction is important From this point of view, the method of prediction is discussed focusing on stress-failure mechanism-failure modes. 3. Fail-safe and Error Proof for Prevention of Problems Even for long-time experienced products in the market such as gas stoves, oil fan heaters, etc., they have to operate safely. In this case, fail safe design which fails safely when it fails must be applied. This method is discussed. Also, it is impossible to eliminate human errors completely. For this, error proof technique is a key. Focusing on information processing of human, systematic error proof methods are proposed. 4. Investigation of Condition Monitoring Maintenance with Information Technology Condition monitoring maintenance plays an important role in preventing the failures of huge and complex systems. This research investigated an optimal policy for a condition monitoring system which comprises multiple sensors, and derived a necessary and sufficient condition under which an optimal procedure is given by a monotone procedure for both cases of independent and depend observations. This condition is given by the conditional probability matrix, which describes the relationship of sensors' observations and system's true state, having a property of Totally Positive of order 2 (TP_2)/ Weak Multivariate Likelihood Ratio (Weak-MLR) property for the case of independent/dependent observation., 17510118
2005 - 2007

The 13th International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE 2024)
Competition etc, Planning etc, Program Committee Member, Mar. 2024 - Dec. 2024

国際学術誌論文査読3件
IEEE Transactions on Reliability (1件)
Journal International Transactions in Operational Research （1件）
国際会議論文査読12件
2018 - 2018

国際学術誌論文査読3件
IEEE Transactions on Reliability (1件)
IISE Transactions (1件)
Journal of Quality Technology and Quantitative Management (1件)

国際会議論文査読10件
2017 - 2017