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Measuring Policy performance in Online Pricing with Offline Data:Worst-case Perspective and Bayesian Perspective

Journal of Systems Science and Systems Engineering 2023年第3期32卷 352-371页

作者： Yue Wang Zeyu Zheng Department of Computational Medicine University of CaliforniaLos AngelesCA 90095USA Institut des Hautes Etudes Scientifiques Bures-sur-YvetteEssonne 91440France Department of Industrial Engineering and Operations Research University of CaliforniaBerkeleyCA 94720USA

The problems of online pricing with offline data,among other similar online decision making with offline data problems,aim at designing and evaluating online pricing policies in presence of a certain amount of existing offline data.To evaluate pricing policies when offline data are available,the decision maker can either position herself at the time point when the offline data are already observed and viewed as deterministic,or at the time point when the offline data are not yet generated and viewed as stochastic.We write a framework to discuss how and why these two different positions are relevant to online policy evaluations,from a worst-case perspective and from a Bayesian perspective.We then use a simple online pricing setting with offline data to illustrate the constructions of optimal policies for these two approaches and discuss their differences,especially whether we can decompose the searching for the optimal policy into independent subproblems and optimize separately,and whether there exists a deterministic optimal policy.

关键词： Online pricing offline data performance measure worst-case approach Bayesian approach

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THE DEVELOPMENT AND APPLICATION OF RISK-ADJUSTED performance measure

THE DEVELOPMENT AND APPLICATION OF RISK-ADJUSTED PERFORMANCE...

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2005年中国机械工程学会年会

作者： LI Hongwei (Economics and Finance School of Xi''an Jiaotong University, Xi''an, 710049, China)

＜正＞The ultimately performance aim of firm is value maximization, and measuring performance should take risk factor into account. The issue of theory and practice about Risk-Adjusted performance measurement （RAPM） in firms has been discussed for several years. This paper describes the development and application of RAPM or RAROC （Risk-adjusted return on capital） in corporate performance measures. There are two kinds of methodologies to measure firms performance, one is analyzing performance with financial ratios based on accounting, e.g. ROE or ROI, the other one is internal performance measurement based on economic profit. In this paper we principally study RAROC approach which is most important one of risk-adjusted performance measures.

关键词： value-management performance measure risk-adjusted RAROC

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An Effective Randomized QoS Routing Algorithm on Networks with Inaccurate Parameters

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Journal of Computer Science & Technology 2002年第1期17卷 38-46页

作者：王建新陈建二陈松乔 Department of Computer Science Central South University Changsha 410083 P.R. China

This paper develops an effective randomized on-demand QoS routing algorithm on networks with inaccurate link-state information. Several new techniques are proposed in the algorithm. First, the maximum safety rate and the minimum delay for each node in the network are pre-computed, which simplify the network complexity and provide the routing process with useful information. The routing process is dynamically directed by the safety rate and delay of the partial routing path developed so far and by the maximum safety rate and the minimum delay of the next node. Randomness is used at the link level and depends dynamically on the routing configuration. This provides great flexibility for the routing process, prevents the routing process from overusing certain fixed routing paths, and adequately balances the safety rate and delay of the routing path. A network testing environment has been established and five parameters are introduced to measure the performance of QoS routing algorithms.Experimental results demonstrate that in terms of the proposed parameters, the algorithm outperforms existing QoS algorithms appearing in the literature.

关键词： QoS network routing randomized algorithm link-state information performance measure

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Roundabout performance Analysis Using Connected Vehicle Data

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Journal of Transportation Technologies 2022年第1期12卷 42-58页

作者： Enrique Saldivar-Carranza Jijo K. Mathew Howell Li Darcy M. Bullock Purdue University West Lafayette USA

There are over 8000 roundabouts in the United States. The current techniques for assessing their performance require field counts to provide inputs to analysis or simulation models. These techniques are labor-intensive and do not scale well. This paper presents a methodology to use connected vehicle (CV) trajectory data to estimate delay and level of service for roundabout approaches by adapting the Purdue Probe Diagram used for traffic signal analytics. By linear referencing vehicle trajectories with a particular movement based on the location and time they exit a roundabout, delay can be calculated. The scalability is demonstrated by applying these techniques to assess over 100 roundabouts in Carmel, IN during the weekday afternoon peak period in July 2021. Over 264,000 trajectories and 3,600,000 GPS points were analyzed to rank over 300 roundabout approaches by delay and summarize in Pareto-sorted graphics and maps. The paper concludes by discussing how these techniques can also be used to analyze queue lengths and origin-destination characteristics at roundabouts. The methodology presented in this study can be used by any agency that wants to assess the performance of all roundabouts in their system.

关键词： Roundabout performance measure Connected Vehicle Big Data

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A Maintenance Model Based on Phase Type Distribution for Equipment under Two Types of Failures

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International Journal of Plant Engineering and Management 2007年第4期12卷 207-213页

作者： YIN Xiao-hu WEN Xi-sen YANG Yong-min QIAN Yan-ling Institute of Mechatronic Engineering School of Mechatronics and Automation National University of Defense Technology Changsha 410073 P. R. China

A maintenance model is put forward for equipment, which is subjected to internal and external failures. In the model, two maintenance pollcies--perfect minimal repair and replacement are considered. The operational time has a phase type distribution （PH distribution）. Failures＇ arrival follows a Markovian Arrival Process （MAP）. Some failures require the replacement of the system, and others minimal repairs. The performance measures-the mean number of minimal repairs and replacements are analyzed and calculated.

关键词： maintenance model phase type distribution performance measure

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An Objective Image Fusion performance Index:Normalized Edge Mutual Information

An Objective Image Fusion Performance Index:Normalized Edge ...

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第三十届中国控制会议

作者： XIAO Bo~1,YAN Liping~2 1.School of Information and Communication Engineering,Beijing University of Posts and Telecommunications, Beijing 100876,P.R.China. 2.Department of Automatic Control,Beijing Institute of Technology,Beijing 100081,P.R.China.

＜正＞Image fusion performance evaluation indices are studied in this paper,and an objective measure is presented,which is the normalized edge mutual information（NEMI）.NEMI is defined in view of information transmission and human vision system, and is used to evaluate the performance of pixel level image fusion algorithms.Several valuable properties of it are shown.The effectiveness of the NEMI is illustrated through experiments.

关键词： Image fusion performance measure entropy human vision system normalized edge mutual information

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Examining the impact of Enterprise Resource Planning（ERP）system implementation on Firm performance

Examining the impact of Enterprise Resource Planning（ERP）s...

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中国会计学会2005年学术年会

作者： Dong-Hoon Yang Seongcheol Kim Chanhoo Song In-Gul Lee School of IT Business Information and Communication University 119MunjiroYuseong-GuDaejeon 305-714 Republic of Korea

＜正＞In recent years,many companies have been implementing ERP systems to overcome new challenges and survive severe business environment which is dramatically changing.However, implementation of ERP system requires a great deal of resources including money,time,efforts and others.Despite the tremendous amount of costs and efforts,there are still doubts about the effects of ERP implementation. In this paper,by analyzing multi-year financial data of ERP-adopting firms,we examined whether firms that implemented ERP systems have shown performance improvement using a wide variety of performance measures.We employed the intra-firm comparison and matched pair comparison methods to compare performance measures before and after ERP implementation within a firm over 7-year period.Overall,the results showed that ERP system implementation was positively associated with improvement of firm performance.We also found that average performance of ERP adopting firms was greater than one of non-ERP adopting firms.These significant findings suggest that adopting ERP systems may expect better firm performance since they have more future benefits gained from ERP systems.

关键词： Enterprise Resource Planning,ERP Firm performance performance measure

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