Relevant bibliographies by topics / Systems „man-machine environment” reliability

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Systems „man-machine environment” reliability'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Systems „man-machine environment” reliability"

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Feng, Qiang, Wei Jie Gao, Cai Xia Wang, and Xiao Jie Guo. "Application of MMESE in Engine Room Safety Management." Advanced Materials Research 487 (March 2012): 247–52. http://dx.doi.org/10.4028/www.scientific.net/amr.487.247.

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The reliability of the engine room is an important guarantee for the safety of ship. This article uses the theory of Man-machine environment Systems Engineering, combined with the engine room safety management practice, comprehensively analyze the characteristics of man, machine and environment and their impact on engine room safety, Finally, it gives some engine room safety management measures which are based on the theory of Man-machine environment Systems Engineering.
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Rytov, Mikhail, and Valeriy Spasennikov. "Theoretical and applied issues of selection and training of operators of human-machine complexes in domestic ergonomics." Ergodesign 2020, no. 4 (2020): 203–23. http://dx.doi.org/10.30987/2658-4026-2020-4-203-223.

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The main criteria, stages and directions of professional selection of operators of the "man-machine-environment" systems are revealed. Mathematical models of professional aptitude assessment based on the use of a sequential probability ratio and the theory of pattern recognition are presented. Given the approach to assessment of efficiency of professional selection, taking into account the accuracy, reliability and validity of the forecast of professional suitability of operators and the possibility of assessing the professional suitability of operators and the quality of the workplace for temporary tochnostyu and probabilistic indicators. Modern training technologies used in military and civil man-machine complexes are considered.
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Rytov, Mikhail, and Valeriy Spasennikov. "Theoretical and applied issues of selection and training of operators of human-machine complexes in domestic ergonomics." Ergodesign 2020, no. 4 (2020): 203–24. http://dx.doi.org/10.30987/2658-4026-2020-4-203-224.

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The main criteria, stages and directions of professional selection of operators of the "man-machine-environment" systems are revealed. Mathematical models of professional aptitude assessment based on the use of a sequential probability ratio and the theory of pattern recognition are presented. Given the approach to assessment of efficiency of professional selection, taking into account the accuracy, reliability and validity of the forecast of professional suitability of operators and the possibility of assessing the professional suitability of operators and the quality of the workplace for temporary tochnostyu and probabilistic indicators. Modern training technologies used in military and civil man-machine complexes are considered.
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Shvetsova, V. I. "Optimization of “human-machine-environment” system: human operator reliability assessment." Monitoring systems of environment, no. 1 (March 25, 2021): 147–53. http://dx.doi.org/10.33075/2220-5861-2021-1-147-153.

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This article highlights the need to take into account the human component when solving optimization problems in the “man-machine-environment” system. However, currently there are no methods for quantifying the human operator reliability in such systems. An approach for assessing the human operator reliability is proposed. The mathematical apparatus for describing the human operator reliability in the ergatic system based on the Markov theory of random state transitions described by a polynomial system of differential equations for each human operation in the system in a theoretical form is presented. The implementation of this mathematical apparatus assumes the availability of statistical and experimental data on the failure rates and restoration of its productivity. The possibility of the designer to assess the final probability of the human operator of the ergatic environmental control system for one of the most critical operations (to achieve the final goal) in the absence of statistical (experimental) data by analogy with the “weak” link in the technical system is justified. The methodological solution for assessing the human operator reliability in an ergatic control system based on experimental data using the example of a manual trigger of a fire alarm system, based on the expression of a standard pointer in the form of a readiness factor of technical products is shown. The experiment was conducted on a stand assembled from commercially available products, simulating a fire alarm device. In the article the experimental research results by four age groups and their statistical processing are presented.
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Kontogiannis, Tom. "User strategies in recovering from errors in man–machine systems." Safety Science 32, no. 1 (1999): 49–68. http://dx.doi.org/10.1016/s0925-7535(99)00010-7.

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Loganathan, M. K., and O. P. Gandhi. "Reliability evaluation and analysis of CNC cam shaft grinding machine." Journal of Engineering, Design and Technology 13, no. 1 (2015): 37–73. http://dx.doi.org/10.1108/jedt-10-2012-0042.

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Purpose – Reliability assessment does require an effective structural modelling approach for systems, in general and manufacturing systems are no exception. This paper aims to develop it for large manufacturing systems using graph models, a systems approach. Design/methodology/approach – Structural graph models for reliability at various hierarchical levels are developed by considering a CNC cam shaft grinding machine. The system reliability expression is obtained by converting the reliability graphs into equivalent matrices, which helps to evaluate and analyse system. Findings – Using the obtained reliability expressions at various hierarchical levels of the system, it is possible not only to evaluate its reliability from structure point of view but also to identify weak structural elements from reliability point of view. Research limitations/implications – The approach can be extended to include the influence of other parameters, such as human, component and environment, etc., on the system reliability. Practical implications – The approach helps to design and develop manufacturing systems from reliability consideration by assessing their possible alternatives among these. Originality/value – The suggested methodology is useful for reliability evaluation of large and complex manufacturing systems.
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Woropay, Maciej, Piotr Bojar, and Mirosław Szubartowski. "Assessment of the Level of Undesirable Actions of People Involved in Road Transport Systems and their Environments." Journal of Konbin 8, no. 1 (2008): 241–48. http://dx.doi.org/10.2478/v10040-008-0117-4.

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Assessment of the Level of Undesirable Actions of People Involved in Road Transport Systems and their Environments. Road transport systems are socio-technical systems of the type Human - Technical object- Environment <H-TO-E>. In these systems hazards can be caused by: the man C, the technical object OT, and influence of the environment on the technical object and people who are present in the system and its environment. The authors of the paper make an attempt to evaluate the level of threats resulting from intended or not intended actions of people situated in this environment.
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Berger, Simon, Patrick Biehle, Miguel Villarroel, Nicolas Brückmann, Christoph Richter, and Gunther Reinhart. "Identification of Influence Parameters and Dependencies on the Illumination of Machine Vision Systems for Robots." Advanced Materials Research 1140 (August 2016): 408–15. http://dx.doi.org/10.4028/www.scientific.net/amr.1140.408.

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Machine vision systems need to cope with harsh environmental conditions, when used for guiding robots. To increase the reliability of these systems, they are either shielded from their environment or highly advanced, using sophisticated mathematical algorithms. In this paper the effects of external illumination on machine vision systems are investigated. For this the pose and the brightness of the external illumination and the internal illumination of the camera and its exposure time are varied. In a next step the correlation between the parameters of the external illumination and reliability of the machine vision system is analysed. Finally requirements are derived for further development of machine vision systems.
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Ristov, Pančo, Pavao Komadina, and Vinko Tomas. "Reliability and Availability of the Vessel Traffic Management and Information Systems." Transactions on Maritime Science 2, no. 2 (2013): 101–8. http://dx.doi.org/10.7225/toms.v02.n02.002.

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This paper presents an approach to the reliability and availability of Vessel Traffic Management and Information Systems through the analysis of hardware, software and human reliability. The paper analyzes the critical subsystems and modules on the basis of the reliability theory, in order to achieve and ensure the availability of systems, i.e. to increase the safety of maritime traffic and the protection of the sea and marine environment. The paper discusses some of the techniques and mechanisms of hardware and software redundancy, as well as the activities that result in increasing the reliability of man.
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Zhou, Guanghui, Fengtian Chang, Changle Tian, and Qi Lu. "A reliability optimization allocation method for the hydraulic system of CNC honing machine considering the operating condition information." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 12 (2017): 2244–64. http://dx.doi.org/10.1177/0954406217719475.

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In recent years, reliability optimization allocation has drawn a broad spectrum of attentions, especially for complex systems consisting of a large number of subsystems and components. Hydraulic system, deemed as a complex system, plays a great role in reliability increment of the CNC honing machine. In order to realize the CNC honing machine tool’s balanced operating performance, the crucial hydraulic system is designed to obtain the optimal and well-balanced allocation solution under the constrains of cost and reliability. Meanwhile, the quantified operating factor that influences the allocation solution is rarely considered adequately when operating samples are insufficient. So, if hydraulic systems are used in a new required longer operating mission duration or a new severer operating environment, the dissatisfied reliability could not be better reallocated to adapt to this environment with appropriate methods. Aimed at overcoming the abovementioned shortcomings and optimizing the dissatisfied reliability for existing hydraulic systems, this paper proposes a reliability optimization allocation method considering operating the condition information. From the standpoint of the complex system, this method firstly builds a three-level reliability optimization allocation model based on the analytic target cascading for the specific hydraulic system of CNC honing machine 2MK2263 × 200. It transforms the complex reliability allocation problem to a set of smaller and coordinated optimization sub-problems. Secondly, through studying the operating reliability problems of small samples in the new operating scene, the reliability prediction results based on the operating condition information are applied to build the initial reliability targets, which are regarded as the initial constrains for the optimization. With the help of analytic target cascading model and initial target reliability, the optimal reliability for the complex hydraulic system would be obtained. It is also shown to provide an innovative route for the reliability redesign of the related complex systems for this new required operating scene.
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Dissertations / Theses on the topic "Systems „man-machine environment” reliability"

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Vasiliauskas, Gediminas. "Girdimosios informacijos kokybės triukšmingoje aplinkoje tyrimai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20090114_155102-81586.

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Darbo apimtis 69 puslapiai, 14 lentelių, 26 paveikslai, panaudotas 31 literatūros šaltinis, 4 priedai. Darbo tikslas yra ištirti sistemos „žmogus-mašina-aplinka“ elementų informacinį patikimumą ir išsiaiškinti garsinių signalų sklidimo triukšminga aplinka trukdžius bei įvertinti garsinės informacijos tokioje aplinkoje, kokybę. Darbe nagrinėjamas sistemos „žmogus-mašina-aplinka“ informacinis patikimumas ir jo neatitiktys situacijai, sukeliančios nepaprastuosius įvykius. Literatūros apžvalgoje didelis dėmesys skiriamas girdimosios informacijos kokybės pokyčių analizei esant triukšmui, aptariama klausos apsaugos priemonių įtaka darbuotojo informaciniam komfortui. Teoriniuose tyrimuose daug dėmesio skiriama erdvinės girdos ir garso šaltinio lokalizacijos biologiniams aspektams, analizuojami garsinio signalo kokybinio vertinimo rodikliai. Tyrimų rezultatų analizė rodo jog didelę reikšmę informacijos sklidimui turi jos amplitudinė dažninė charakteristika, o žmogus gali iš aplinkos išskirti net tuos signalus, kurių kalbos interferencijos rodiklis (SIL) mažesnis už 5dBA. Taip pat nustatyta, jog informaciniai signalai informatyvūs, kai jų lygis vienoje iš 4 oktavinių juostų bent 5 dBA aukštesnis, o klausos apsaugos priemonių slopinimas ne didesnis kaip 20 dBA. Darbe gauti rezultatai gali būti panaudoti kaip priedas vertinant profesinę riziką darbo vietose.<br>Work consists of 69 pages, 14 data tables, 26 illustrations, 4 attachments, 31 literature sources is used The purpose of this work is to investigate informational reliability of the “man-machine-environment” system and find out the difficulties of audible information spread in noisy environment and also estimate the quality of this information. „Man-machine-environment“system informational reliability is being analyzed in literature review section. An extensive attention intended for audible information quality in noise, influence of using hearing protectors also discussed. Finally spatial hearing and sound localization biological aspects reviewed, qualitative indexes of audible signal analyzed. Research analysis showed that significant account for audible information propagation has its amplitude frequentative characteristic but man can dissociate even these audible signals, of which speech interference level (SIL) is poor, or less than 5 dBA. Also determined that informational signals are informative when their level is at least 5 dBA higher in one of four octave bands and when hearing protector suppression is less than 20 dBA. Results can be used as extra information for professional risk assessment.
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Karapars, Zeynep. "The Relationship Between Socio Economic Factors And Use Context In Product Usability." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604998/index.pdf.

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ABSTRACT THE RELATIONSHIP BETWEEN SOCIO ECONOMIC FACTORS AND USE CONTEXT IN PRODUCT USABILITY Karapars, Zeynep M. Sc., Department of Industrial Design Supervisor: Assoc. Prof. Dr. &Ccedil<br>igdem Erbug April 2004, 184 pages Developments in the usability discipline have lead to new paths in new product development processes. The methods for development of usable products are abundant and the area is crescent for new research. One of the concerns in usability lies in the question of employment of user centered design in the prevailing product development processes. In this study, it is aimed to be clarified that inquiry into the use context should be an initial step in user centered design. However, use context is one of the less explored areas of usability. Detailed examinations of contextual factors may open paths to new methods of integrating usability into products. This study aims to take a step towards the analysis of the impact of socio economic factors on usability of product. A field study is made in order to acquire a deeper understanding. Samples of two different socio-economic groups are defined from the marketing perspective. Contextual factors are specified on the example of washing machines. Comparison of problems between the users from the two socio economic groups shed light on the relationship between socio economic variables and usability problems.
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Books on the topic "Systems „man-machine environment” reliability"

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Ntuen, Celestine A. An expert system for planning and scheduling in a telerobotic environment: Final report. National Aeronautics and Space Administration, Langley Research Center, 1991.

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Proudfoot, Diane, and B. Jack Copeland. Artificial Intelligence. Edited by Eric Margolis, Richard Samuels, and Stephen P. Stich. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780195309799.013.0007.

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In this article the central philosophical issues concerning human-level artificial intelligence (AI) are presented. AI largely changed direction in the 1980s and 1990s, concentrating on building domain-specific systems and on sub-goals such as self-organization, self-repair, and reliability. Computer scientists aimed to construct intelligence amplifiers for human beings, rather than imitation humans. Turing based his test on a computer-imitates-human game, describing three versions of this game in 1948, 1950, and 1952. The famous version appears in a 1950 article inMind, ‘Computing Machinery and Intelligence’ (Turing 1950). The interpretation of Turing's test is that it provides an operational definition of intelligence (or thinking) in machines, in terms of behavior. ‘Intelligent Machinery’ sets out the thesis that whether an entity is intelligent is determined in part by our responses to the entity's behavior. Wittgenstein frequently employed the idea of a human being acting like a reliable machine. A ‘living reading-machine’ is a human being or other creature that is given written signs, for example Chinese characters, arithmetical symbols, logical symbols, or musical notation, and who produces text spoken aloud, solutions to arithmetical problems, and proofs of logical theorems. Wittgenstein mentions that an entity that manipulates symbols genuinely reads only if he or she has a particular history, involving learning and training, and participates in a social environment that includes normative constraints and further uses of the symbols.
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Book chapters on the topic "Systems „man-machine environment” reliability"

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Zhang, Shanshan, Xiaopeng Li, Wei Zhang, et al. "Reliability Modeling and Analysis of Teleoperation System with Path-Dependence Effect Considered." In Man-Machine-Environment System Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6978-4_115.

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Zhang, Li, Jianqiao Liu, and Yanhua Zou. "Framework of Performance Shaping Factors for Human Reliability Analysis of Digitized Nuclear Power Plants." In Man-Machine-Environment System Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6978-4_116.

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Zhang, Tianya, and Jingxiong Wang. "Human Reliability Analysis of Traffic Safety." In Proceedings of the 13th International Conference on Man-Machine-Environment System Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38968-9_56.

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Huang, Baiqiao, and Jun Zhang. "Integrated Analysis of System Reliability and Safety by Man-Machine-Environment System Engineering." In Proceedings of the 13th International Conference on Man-Machine-Environment System Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38968-9_69.

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Gao, Xiang, Haiwen Zheng, Zhimin He, Ming Kong, Maowen Wang, and Min Chen. "Analysis of Influence on Operation Reliability by Interior Environment of a Certain Self-propelled Anti-air System." In Proceedings of the 13th International Conference on Man-Machine-Environment System Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38968-9_49.

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Bagnara, S., A. Rizzo, and F. Stablum. "Error Analysis in Man-Machine Systems." In Reliability Data Collection and Use in Risk and Availability Assessment. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83721-0_1.

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Rotshtein, A. "Fuzzy Reliabilty Analysis of Labour (Man-Machine) Systems." In Reliability and Safety Analyses under Fuzziness. Physica-Verlag HD, 1995. http://dx.doi.org/10.1007/978-3-7908-1898-7_17.

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Wang, Bo, Hong Yuan, Shujie Tian, Changhua Jiang, and Li Wang. "Modeling the Reliability of Man-Machine Systems with Sequential Interaction Gate." In Lecture Notes in Computer Science. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39510-4_49.

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Huang, Baiqiao, and Yuanhui Qin. "Man–Machine–Environment Systems Engineering Research Based Mental Workload Measurement Model of Using Software." In Proceedings of the 14th International Conference on Man-Machine-Environment System Engineering. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-44067-4_52.

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Huang, Yinying, and Zhihao Hu. "Application of Man–Machine–Environment Systems Engineering in Financial Innovation and the Transition of Central Banks." In Lecture Notes in Electrical Engineering. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48224-7_79.

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Conference papers on the topic "Systems „man-machine environment” reliability"

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Shi, Shan, Chengmao Li, Depeng Liu, and Qianzhou Luo. "Man-machine-environment based aircraft electromechanical system reliability analysis." In 2015 IEEE International Conference on Mechatronics and Automation (ICMA). IEEE, 2015. http://dx.doi.org/10.1109/icma.2015.7237541.

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Timashev, Sviatoslav A. "Human Factor in the Life Cycle and Safety of Machines and Pipelines." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-1919.

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The paper is an overview (using references listed below) and describes the main components, means and methods of a holistic and quantitative human reliability analysis (QHRA) using quantitative values of human error when performing Fault Tree Analysis (FTA) and Event Tree Analysis (ETA). It also deals with qualitative assessment of the influence of the human factor (HF) reliability on safety and risk analysis of potentially dangerous man-machine-structures-environment systems (PDMMSES). Qualitative risk analysis of such man-machine-structures-environment (MMSE) systems is based on using the event-decision technique in combination with a generalized socio-psychological model of the decision making person (DMP). Three types of DMP’s are considered: members of maintenance/repair crews, diagnosticians and different rank DMP’s that operate or own the PDMMSES.
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Davis, James, Jason Scott, Janos Sztipanovits, Gabor Karsai, and Marcus Martinez. "An Integrated Multi-Domain Analysis Environment for High Consequence Systems." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/cie-5532.

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Abstract Modeling and analysis of high consequence, high assurance systems requires special modeling considerations. System safety and reliability information must be captured in the models. Previously, high consequence systems were modeled using separate, disjoint models for safety, reliability, and security. The MultiGraph Architecture facilitates the implementation of a model-integrated system for modeling and analysis of high assurance systems. Among the tools used for analyzing safety and reliability are a behavioral simulator and an automatic fault tree generation and analysis tool. Symbolic model checking techniques are used to efficiently investigate the system models. A method for converting finite state machine models to ordered binary decision diagrams allows the application of symbolic model checking routines to the system models. This integrated approach to modeling and analysis of high consequence systems ensures consistency between the models and the different analysis tools.
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Zhao, Jing, Yiran Yang, and Lin Li. "The Impact of Material Aging on Stereolithography Reliability: An Experimental Study." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8313.

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Abstract Additive manufacturing as an emerging technique, however, delivers relatively low reliability compared to traditional manufacturing. Unlike in traditional manufacturing systems that manufacturers mainly focus on the machine reliability by adopting failure rates of equipment, in additive manufacturing systems the performance of reliability is often evaluated by the consistency of measurement results. In addition, the reliability of additive manufacturing systems is not only affected by the failure rates of machine elements, the condition of the photo-sensitive raw material could also lead to variations on the overall performance of the additive-manufactured products and thus affect the reliability. In this work, the impact of raw material condition with respect to the material aging time on the reliability of the stereolithography manufactured products is evaluated experimentally. More specifically, the liquid resin is sampled and stored in a laboratory environment for 2, 6, 8, and 12 days of aging, respectively. A series of specimens are printed with the aged raw materials as well as the fresh raw material. By computing the standard deviation and correlation of the measurements among specimens, the results indicate that material aging time has a negligible impact on the geometric dimension of the specimens while it does significantly affect the hardness. In other words, the results of the work imply that the reliability of stereolithography is significantly affected by raw material aging time.
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Havlikova, Marie, and Miroslav Jirgl. "Reliability analysis in man-machine systems." In 14th International Carpathian Control Conference (ICCC). IEEE, 2013. http://dx.doi.org/10.1109/carpathiancc.2013.6560521.

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Momin, Geoffrey, Raj Panchal, Daniel Liu, and Sharman Perera. "Case Study: Enhancing Human Reliability With Artificial Intelligence and Augmented Reality Tools for Nuclear Maintenance." In ASME 2018 Power Conference collocated with the ASME 2018 12th International Conference on Energy Sustainability and the ASME 2018 Nuclear Forum. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/power2018-7495.

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Human error accounts for about 60% of the annual power loss due to maintenance incidents in the fossil power industry. The International Atomic Energy Agency reports that 80\% of industrial accidents in the nuclear industry can be attributed to human error and 20\% to equipment failure. The Personal Augmented Reality Reference System (PARRS) is a suite of computer-mediated reality applications that looks to minimize human error by digitizing manual procedures and providing real-time monitoring of hazards present in an environment. Our mission is to be able to provide critical feedback to inform personnel in real-time and protect them from avoidable hazards. PARRS aims to minimize human error and increase worker productivity by bringing innovation to safety and procedural compliance by leveraging technologies such as augmented reality, LiDAR, computer machine learning and particulate mapping using remote systems.
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Cappelli, Mauro, Stefano Di Gennaro, Fabrizio Memmi, and Massimo Sepielli. "Using a Hybrid FPGA-CPU Platform for a User-Friendly Environment in Control Systems Design: A Possible Application to Nuclear Plants." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-16378.

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In this work, in-depth considerations about FPGA-CPU architectures design methods are presented together with some possible plant applications. FPGAs are used because of their potentials in guaranteeing parallelism, synchronism and high reliability tasks; on the other hand CPUs are crucial to higher precision computations and to reproduce data and results on a graphical interface, thus resulting in an improvement in the human-machine-interface (HMI). Design choices are here reported to justify the benefits from the use of both CPU-FPGA approaches. Taking advantage of these features, the LabVIEW environment and its digital platform is expanded in order to develop a novel tool able to support designers during the fundamental phases of a supervision and control tool realization: from the model development to the digital hardware implementation and testing. LabVIEW is able to communicate with several languages like Matlab or Scilab for a theoretical model study and simulation, and VHDL for a digital implementation, taking the advantages from both development environments. Main results have been reported concerning studies of control systems in nuclear plant facilities, showing how a full-digital platform can be very useful in developing monitoring and control instrumentation. This new tool is thought to improve the so-called hardware in the loop (HIL) simulations and to accelerate the process of prototypes implementation and testing, using a more accurate and reliable environment in terms of performance and safety.
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Xinyu, Dai, Yang Ming, Zou Bowen, and Lu Hongxing. "Hierarchical Modeling of GO-FLOW Models for Online Risk Monitoring of Nuclear Power Plants." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-67543.

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As a clean and safe energy, nuclear power plays an important role in solving the increasingly prominent environmental problems in the world. Researches on the reliability analysis and risk assessment for the safety operation of Nuclear Power Plants (NPPs) have been paid much more attention due to several accidents in the past decades. GO-FLOW is a methodology for analyzing the reliability of dynamic systems with common cause failures (CCFs), man-machine failures, and time-dependent mission issues. The traditional GO-FLOW methodology presents a set of operators each of which stands for a relatively basic reliability logic. Complex behavior of a physical component may be simply described by one operator or a combination of operators. Therefore the GO-FLOW chart of a system is much more similar to its physical structure diagram than other reliability models such as Fault Tree. In a previous study by authors, a Living PSA technology based on GO-FLOW was proposed which utilizes a group of interrelated GO-FLOW operators to describe the potential change of states of a physical component between operation, standby, failure, preventive and corrective maintenance. The proposed Living PSA technology is intended to provide a convenient way for the safety engineers to update the PSA models for risk assessment. However, it will make the PSA models complex, quite different from their physical structure diagram and therefore difficult to check. This paper presents a hierarchical modeling method of GO-FLOW. The GO-FLOW model of a system will be organized at different layers, including system layer, structure layer and component layer. The proposed Living PSA technology is only applied at component layer and different level of layers are interrelated by introduction of new GO-FLOW operators and equivalent relations. Thus, the GO-FLOW models at the higher layers are more similar to their physical structures of system for understanding and checking. A bottom-up calculation algorithm for the reliability analysis is also presented. An Auxiliary Feedwater System (AFWS) of PWR plant is taken as a study case to show to modeling and analyzing a system for reliability and risk assessment based on this new technology.
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Nakashima, Kazuhiro, Carlos Morillo, Yoshie Kurono, Yoshinori Sawae, and Joichi Sugimura. "Wear Mechanisms of PTFE in Humidified Hydrogen Gas." In ASME/STLE 2011 International Joint Tribology Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ijtc2011-61180.

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PTFE is used as sealing material of machine elements in hydrogen utilizing machine systems, such as fuel cell vehicles and related infrastructures. It is necessary to know the tribological property of sealing materials in hydrogen gas to realize safety and reliability of machine elements operated in hydrogen environment. In this study, humidity in gases was focused on and its effects on the friction and wear of rubbing pair of PTFE pin and AISI 316L disk was investigated in pin-on-disk wear apparatus. The result indicated that the humidity in hydrogen gas had little effect on the friction coefficient between PTFE and AISI 316L. However, the specific wear rate of unfilled PTFE was clearly affected by the humidity. The amount of PTFE transfer film formed on the stainless surface gradually decreased with decreasing the humidity in hydrogen gas. The similar results could be obtained in inert argon gas as well. Water molecules remained in gaseous environments would be included in the formation process of PTFE transfer film affect on formation of PTFE transfer film. The humidity in hydrogen gas should be regulated to ensure the tribological behavior of the PTFE/stainless sliding pair being used in the hydrogen environment.
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Tang, Huan, Jianbin Guo, and Guo Zhou. "Mission reliability analysis of Man-machine system." In 2015 First International Conference on Reliability Systems Engineering (ICRSE). IEEE, 2015. http://dx.doi.org/10.1109/icrse.2015.7366423.

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