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International Multiconference of Engineers and Computer Scientists 2016, IMECS 2016

作者： Stefanie, X.Q. Kang Tsang, Steve N.H. Chan, Alan H.S. Liu, S.L. School of Management Xi'an Jiao Tong University Key Lab Ministry of Education for Process Control and Efficiency Projects Xi'an710049 China Department of Systems Engineering and Engineering Management City University of Hong Kong Kowloon Tong Kowloon Hong Kong

ISBN: (纸本)9789881404763

In this study, the recall accuracies for different keys on a keyboard were studied and analyzed in a systematic way. It was found that alphabetic keys in the area of "Typing keys" resulted in relatively lower recall accuracies than "Function keys", "control keys" and "Numeric keys". Besides, there was an absence of significant association between the relative use frequency of English letters and their recall accuracies, confirming to the general expectation that typing tasks rely on the processing of implicit memory rather than explicit memory. Regarding the recall accuracies for numeric keys, participants had higher recall accuracy for the keys located in "Numeric keypad" than those in the "Typing key" area. This might be the result of experience transfer from their daily interaction with devices of similar layout (ATM). Some useful suggestions were provided for the design of a more user-friendly keyboard layout.

关键词： Ergonomics

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Research on Whole-Link Risk Situational Awareness Index System and Dynamic Risk Pool Supervision 11

Research on Whole-Link Risk Situational Awareness Index Syst...

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11th International Conference on Networks, Communication and Computing, ICNCC 2022

作者： Sun, Jingchun Deng, Fei Du, Boya School of Management Xi'An Jiaotong University China Key Laboratory of the Ministry of Education for Process Control and Efficiency Engineering China College of Information Engineering Kunming University China Key Laboratory of Data Governance and Intelligent Decision Universities of Yunnan China

ISBN: (纸本)9781450398039

With the development of society, network security becomes more and more important. It is inevitable to establish the risk index system to effectively monitor the security of network. In the previous study, due to absence of risk indicators, the risk supervising system is not perfect. However, there are few researches on the whole-link risk index system, and the determination of risk indicators lacks basis. Therefore, this paper firstly constructs a new risk index system of situational awareness, which can avoid the omission of risk indicators. Then the sliding window is used to observe this system and the optimal window width is found to determine the dynamic risk pool. Finally, the indicators of dynamic risk pool are used to dynamically monitor the whole link risk index system. The whole technical framework not only proves advantages of the mature risk index system of situational awareness, but also overcomes the disadvantage that the risk index of the whole link cannot be determined, and the dynamic risk pool has the sharing characteristics in the whole process. © 2022 ACM.

关键词： Network security

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Numerical modeling of droplets injection in the secondary flow of the wet steam ejector in the refrigeration cycle

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INTERNATIONAL JOURNAL OF REFRIGERATION 2022年 136卷 103-113页

作者： Dadpour, Daryoush Lakzian, Esmail Gholizadeh, Mohammad Ding, Hongbing Han, Xu [a]Center of Computational Energy Department of Mechanical Engineering Hakim Sabzevari University Sabzevar Iran [b]Tianjin Key Laboratory of Process Measurement and Control School of Electrical and Information Engineering Tianjin University Tianjin 300072 China [c]Key Lab of Condition Monitoring and Control for Power Plant Equipment North China Electric Power University Ministry of Education Baoding 071003 China

Steam ejector plays a key role in the refrigeration system. The water has been used as a working fluid because water is more economical and non-toxic. The operating fluid often enters the evaporator as a water liquid and droplets evaporate by absorbing heat. Cooling load changing causes the vapor in the outlet of the evaporator to be accompanied by droplets. Therefore, there are droplets at the inlet of secondary nozzle and flow should be simulated as a wet steam flow with injection droplets at the secondary flow. In this paper, the effects of droplets injection at secondary flow have been investigated on the performance of the refrigeration cycle. For this purpose, the Eulerian-Eulerian method has been used and the results have been validated with experimental data. Six cases are considered with different wetness and number of droplets in the secondary flow. The results of case 6 show COP, T-outlet, and ER decrease about 22.93%, 15.66%, and 22.93%, respectively. In addition, the steam accompanies by droplets at the outlet of ejector. Therefore, it is essential for designers and operators to model and consider the effects of the droplets on the wall erosion to optimize the wet steam ejector and refrigeration cycle performance.

关键词： Wet steam ejector Refrigeration cycle Droplets injection COP ER

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Spatial S-R compatibility effect with head rotation

Spatial S-R compatibility effect with head rotation

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International MultiConference of Engineers and Computer Scientists, IMECS 2014

作者： Tsang, Steve N.H. Kang, Stefanie X.Q. Chan, Alan H.S. Department of Systems Engineering and Engineering Management City University of Hong Kong Kowloon Tong Kowloon Hong Kong School of Management Xi'an Jiao Tong University State Key Lab. for Manufacturing Key Lab. of the Ministry of Education for Process Control and Efficiency Projects Xi'an710049 China

ISBN: (纸本)9789881925336

The effects of signal modality (visual and auditory), hand condition (crossed and uncrossed), and head orientation (upright, right-90, left-90, and left back) on response performance were e xamined in this study. The results showed all the factors significantly affected the reaction time of participants and there was an interaction effect between signal modality and head orientation. Responses for visual signals were significantly faster than those for auditory signals, and responses made with uncrossed hand were superior to those with crossed hand. On head orientation, upright orientation produced the fastest reaction time, while reaction time for head rotated 90° right (right-90) was significantly faster than that for head rotated 90° left (left-90) and rotated left backward (left back). Regarding the significant interaction effect between signal modality and head orientation, processing time for visual signals was always faster than that for auditory signals. Such modality superiority increased to a larger extent under the left 90 and left back head orientations. The findings in this experiment provide some practical ergonomics recommendations for improving control console design in terms of signal-response layout, stimulus-hand arrangement, head orientation, and methods of presenting visual and auditory signals.

关键词： Ergonomics

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Evaluating the moderated-mediation effects of switchingcosts in the link between social capital and NPD performance

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Journal of Management Science and engineering 2024年第2期9卷 161-176页

作者： Yi Li Nelson Oly Ndubisi Gang Li Jinpeng Xu School of Economics&Management Xidian UniversityXi'anChina College of Business&Economics Qatar UniversityDohaQatar School of Management Xi'an Jiao Tong UniversityXi'anChina The State Key Lab for Manufacturing Systems Engineering Xi'anChina The Key Laboratory of the Ministry of Education for Process Control and Efficiency Projects Xi'anChina

In this study,we explore the causes and performance outcomes of switching costs in the context of new product development(NPD)from both the supplier and customer perspectives,and discuss the role that switching costs play as moderators and mediators in the relationship between social capital and NPD *** on data from 214 Chinese manufacturers,we employ the structural equation model to test our conceptual model and *** results indicate that relationship quality and customer involvement positively and negatively affect switching costs,respectively,and that switching costs negatively affect NPD *** costs mediate and moderate the relationship between social capital and NPD ***,switching costs significantly and positively moderate the relationship between relationship quality and NPD *** the other hand,switching costs insignificantly and negatively moderate the relationship between customer involvement and NPD *** theoretical and managerial implications of the findings are discussed.

关键词： Social capital New product development(NPD) Performance Switching costs Moderated mediation analysis China

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Research on structural stability of eco-industrial system (EIS)

Research on structural stability of eco-industrial system (E...

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2011 International Conference on Electronic and Mechanical engineering and Information Technology, EMEIT 2011

作者： Xiao, Zhongdong Zhou, Guanghui School of Management Xi'An Jiaotong University Key Lab of the Ministry of Education for Process Control and Efficiency Engineering Xi'an Shaanxi 710049 China State Key Laboratory for Manufacturing Systems Engineering Xi'an Shaanxi 710049 China School of Mechanical Engineering Xi'An Jiaotong University Xi'an Shaanxi 710049 China

ISBN: (纸本)9781612840857

With the promotion and popularization of EIS in the world, how to improve its structural stability is becoming an urgent problem. Based on complex network theory, this paper tries to study EIS structure with two kinds of cases node (enterprise in the system) and the edge (material and energy flow channels in system) subjected to random disturbances and intentional interference through two kinds of indexes the structural stability and performance trends. After comparative analyzing on actual network samples and virtual network samples by Matlab, paper found that the node and the edge of the deliberate interference with the destruction of the structure to bring the whole network should be much better than the random disturbances. Paper suggested that it is necessary to protect the key enterprise and exchange channels during the actual operation process. © 2011 IEEE.

关键词： Complex networks

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Coupling effect of micro-textured tools and cooling conditions on the turning performance of aluminum alloy 6061

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Advances in Manufacturing 2023年第4期11卷 663-681页

作者： Guo-Liang Liu Jin-Tao Zheng Chuan-Zhen Huang Shu-Feng Sun Xin-Fu Liu Long-Jie Dai De-Xiang Wang Xiang-Yu Wang Key Lab of Industrial Fluid Energy Conservation and Pollution Control Ministry of EducationKey Lab of Industrial Fluid Energy Conservation and Pollution ControlMinistry of EducationSchool of Mechanical and Automotive EngineeringQingdao University of TechnologyQingdao266520ShandongPeople’s Republic of China State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha410083People’s Republic of China Key Laboratory of High-Efficiency and Clean Mechanical Manufacture(Ministry of Education) School of Mechanical EngineeringShandong UniversityJinan250061People’s Republic of China School of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiPeople’s Republic of China Qingdao Choho Ind Co Ltd Qingdao266705ShandongPeople’s Republic of China School of Mechanical Engineering University of JinanJinan250022People’s Republic of China

Micro-texturing has been widely proven to be an effective technology for achieving sustainable ***,the performance of micro-textured tools under different cooling conditions,especially their coupling effect on machined surface integrity,was scarcely *** this paper,the non-textured,linear micro-grooved,and curvilinear micro-grooved inserts were used to turn aluminum alloy 6061 under dry,emulsion,and liquid nitrogen cryogenic cooling *** coupling effects of different micro-textures and cooling conditions on cutting force,cutting temperature,and machined surface integrity,including the surface roughness,work hardening,and residual stress,were revealed and discussed in *** indicated that the micro-grooved tools,especially the curvilinear micro-grooved tools,not only reduced the cutting force and cutting temperature,but also improved the machined surface *** addition,the micro-grooved tools can cooperate with the emulsion or liquid nitrogen to reduce the cutting force,cutting temperature,and improve the machined surface integrity generally,although the combination of emulsion cooling condition and micro-grooved tools generated negative coupling effects on cutting forces and surface work ***,the combination of curvilinear micro-grooved cutting tools and cryogenic cooling condition resulted in the lowest cutting force and cutting temperature,which generated the surface with low roughness,weak work hardening,and compressive residual stress.

关键词： Micro-grooved cutting tool Cooling condition Cutting force Cutting temperature Surface integrity

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An efficient FPRAS type group testing procedure to approximate the number of defectives

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Journal of Combinatorial Optimization 2012年第2期27卷 302-314页

作者： Cheng, Yongxi Xu, Yinfeng School of Management Xi’an Jiaotong University Xi’an China State Key Lab for Manufacturing Systems Engineering Xi’an China Ministry of Education Key Lab for Process Control & Efficiency Engineering Xi’an China

In many fault detection problems, we want to detect or identify defective items in a sample set by using the minimum number of tests. Group testing is for the scenario where each test is on a subset of items, and tells whether the subset contains at least one defective item or not. Another practically important problem is to estimate the number of defective items in a sample set. In this paper, we present an efficient FPRAS (fully polynomial-time randomized approximation scheme) type group testing procedure to approximate the number of defective items in a sample set.

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Integrated Job Scheduling with Parallel-Batch processing and Batch Deliveries

Integrated Job Scheduling with Parallel-Batch Processing and...

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7th International Conference on Combinatorial Optimization and Applications, COCOA 2013

作者： Feng, Xin Zheng, Feifeng School of Management Xi’an Jiaotong University Xi’an Shaanxi710049 China Glorious Sun School of Business and Management Donghua University Shanghai200051 China State Key Lab for Manufacturing Systems Engineering Xi’an Shaanxi710049 China Ministry of Education Key Lab for Process Control and Efficiency Engineering Xi’an Shaanxi710049 China

ISBN: (纸本)9783319037790

This paper studies an integrated scheduling problem which consists of production and distribution stages. Jobs are processed on a parallel-batch machine in the production stage, and then transported to customers in the distribution stage. The aim is to find an integrated schedule in the two stages with the objective to optimize both total delivery time and total transportation cost. We focus on two models with either unbounded or bounded batch processing capacity in the production stage. In both models we assume sufficient vehicles each with infinite transportation capacity. For the unbounded model, we derive an O(g(n/g)2g) time dynamic programming algorithm where g ≥ 1 and n are the number of customers and jobs respectively. For the bounded model, we focus on a special case with m different processing times of jobs, and present an O(n323m) time algorithm. © Springer International Publishing Switzerland 2013.

关键词： Dynamic programming

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Method for prediction of coal and gas outburst based on multi-agent information fusion

Method for prediction of coal and gas outburst based on mult...

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2010 International Conference on Intelligent Computation Technology and Automation, ICICTA 2010

作者： Yan, Xin Fu, Hua Tu, Naiwei Faculty of Electrical and Engineering Control Liaoning Technical University Huludao 125105 China Key Lab of Process Industry Automation Northeastern University Ministry of Education Shenyang 110004 China

ISBN: (纸本)9780769540771

In view of the problems existing in the prediction methods of coal and gas outburst, a method for prediction of coal and gas outburst based on multi-agent information fusion is proposed. In the method, considering the measured data relevant to many influence factors, a multi-agent information fusion model for rapid, dynamic and accurate prediction of coal and gas outburst is given, Dempster-Shafer (D-S) evidence theory is used to reduce the uncertainty and improve the accuracy in the prediction of coal and gas outburst. The results show that the proposed method has high accuracy, which is a practical method to predict coal and gas outburst. © 2010 IEEE.

关键词： Information fusion

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