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A Novel Text Retrieval Algorithm for Public Crisis Cases

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Chinese Journal of Electronics 2019年第4期28卷 712-717页

作者： PENG Yan WANG Jie JIAO Lulin school of management Capital Normal University

Public crisis has the characteristics of suddenness and uncertainty, and it is necessary to combine the knowledge with the experience of other similar situations to make decisions effectively and *** work combines artificial intelligent theory with information technology and brings case-based reasoning to build models consisting of the features of public crisis. We explore the case-representation approach and build a case-based retrieval algorithm. Combining the specificness of Case-based reasoning(CBR) technology in the monitoring of public crisis events, a new case retrieval algorithm for public crisis cases, named as Combined multi-similarity with set of simi-larity matching algorithm based on sememe(CMSBS), is proposed to analyze the cases with high similarity to current *** CMSBS algorithm considers the structural and semantic similarities between two public crisis cases comprehensively. Simulation experiments are performed to validate the representation method of the knowledge,and the simulation results demonstrate that the CMSBS algorithm has superior performance in the average number of matching cases and matching accuracy rate and can work well in providing reference cases for subsequent events.

关键词： Knowledge representation Case retrieval Public crisis Case-based reasoning

A traffic flow cellular automaton model to considering drivers' learning and forgetting behaviour

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Chinese Physics B 2011年第2期20卷 575-585页

作者：丁建勋黄海军田琼 school of Economics and management Beihang University

It is known that the commonly used NaSch cellular automaton （CA） model and its modifications can help explain the internal causes of the macro phenomena of traffic flow. However, the randomization probability of vehicle velocity used in these models is assumed to be an exogenous constant or a conditional constant, which cannot reflect the learning and forgetting behaviour of drivers with historical experiences. This paper further modifies the NaSch model by enabling the randomization probability to be adjusted on the bases of drivers＇ memory. The Markov properties of this modified model are discussed. Analytical and simulation results show that the traffic fundamental diagrams can be indeed improved when considering drivers＇ intelligent behaviour. Some new features of traffic are revealed by differently combining the model parameters representing learning and forgetting behaviour.

关键词： cellular automaton model learning and forgetting behaviour Markov property

A class of exact solutions for N-dimensional incompressible magnetohydrodynamic equations

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Applied Mathematics and Mechanics(English Edition) 2016年第2期37卷 209-214页

作者： Ping LIU school of management Tianjin Normal University

In this paper, a sufficient and necessary condition is presented for existence of a class of exact solutions to N-dimensional incompressible magnetohydrodynamic （MHD） equations. Such solutions can be explicitly expressed by appropriate formulae. Once the required matrices are chosen, solutions to the MHD equations axe directly constructed.

关键词： incompressible magnetohydrodynamic (MHD) equation exact solution symmetric matrix quadratic form curve integration

GOVERNMENT POLICIES AND CORPORATE FINANCING DECISIONS IN CHINA:THEORY AND EVIDENCE

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Journal of Systems Science and Systems Engineering 2013年第1期22卷 93-111页

作者： Kunyuan QIAO Guanghua school of management Peking University

This paper examines the effect of government policies on the financing decisions of firms in China. A real options model is developed to understand how fiscal and monetary policies affect corporate *** model predictions will be tested with a comprehensive panel data set spanning from 2002 to *** work documents robust evidence that show the positive association of both tax and risk-free rate with firm leverage：increase in tax rate and risk free rate by one standard deviation results in the increase in corporate leverages by 0.61 to 1.06 percent and 2.54 to 3.68 percent,*** addition,the productions of the firms are not affected by the tax rate in the short run,and the firms are operating in their optimal market *** implied tax rate and risk free rate are solved by assuming that the firms achieve their optimal *** implied tax rate declines with the size, whereas the opposite goes for implied risk-free rate.

关键词： Tax rate risk free rate market leverage book leverage

Multi-objective optimization for assigning reviewers to proposals based on social networks

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Journal of management Science and Engineering 2024年第3期9卷 419-439页

作者： Xing-Gang Luo Hong-Jie Li Zhong-Liang Zhang Wei Jiang school of management Hangzhou Dianzi UniversityHangzhou310018China Experimental Center of Data Science and Intelligent Decision-Making Hangzhou Dianzi UniversityHangzhou310018China antai College of Economics and management Shanghai Jiao Tong UniversityShanghai200240China

Most of the literature on reviewer assignment problem(RAP)considers fitness or efficiency as the evaluation criterion of an assignment,e.g.,the degree of matching between reviewers and *** this study,we consider fairness of an assignment and establish two multi-objective linear integer programming models for proposal *** introduce a definition of fairness based on the closeness of social relationships between *** closeness of social relationships is quantified based on social networks among reviewers and serves as part of objective *** improved space-partitioning algorithm is designed to solve the multi-objective models with integer *** the problem size is large,two meta-heuristic algorithms are *** on real and randomly generated cases are provided to illustrate the effectiveness of the proposed models and algorithms.

关键词： Assignment Social network Multi-objective optimization Space-partitioning

Novel method for hybrid multiple attribute decision making based on TODIM method

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Journal of Systems Engineering and Electronics 2015年第5期26卷 1023-1031页

作者： Fang Wang Hua Li school of Economics and management Xidian University

The TODIM(an acronym in Portuguese for interactive and multiple attribute decision making) method is a valuable tool to solve the multiple attribute decision making(MADM) problems considering the behavior of the decision maker(DM), while it cannot be used to handle the problem with unknown weight information on attributes. In this paper, a novel method based on the classical TODIM method is proposed to solve the hybrid MADM problems with unknown weight information on attributes,in which attribute values are represented in four different formats:crisp numbers, interval numbers, triangular fuzzy numbers and trapezoidal fuzzy numbers. Firstly, the positive-ideal alternative and negative-ideal alternative are determined, and the gain and loss matrices are constructed by calculating the gain and loss of each alternative relatived to the ideal alternatives concerning each attribute based on different distance calculation formulas, which may avoid the information missing or information distortion in the process of unifying multiform attribute values into a certain representation form. Secondly, an optimization model based on the maximizing deviation(MD) method, by which the attribute weights can be determined, is established for the TODIM method. Further, the calculation steps to solve the hybrid MADM problems are given. Finally, two numerical examples are presented to illustrate the usefulness of the proposed method, and the results show that the DM’s psychological behavior, attribute weights and the transformed information would highly affect the ranking orders of alternatives.

关键词： hybrid multiple attribute decision making TODIM ranking

Investor Protection,Ownership Structure and Corporate Valuation

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Journal of Southwest Jiaotong University(English Edition) 2007年第1期15卷 55-58页

作者：刘培堂吴冲锋 antai school of management Shanghai Jiaotong UniversityShanghai 200052 China

The purpose of this paper is to investigate the relationship between investor protection, ownership structure and corporate valuation. La Porta showed that there existed a simple linear relationship between corporate valuation and the holding percentage of controlling shareholders. But recent empirical evidence does not support it. A nonlinear relationship is proved between ownership structure and corporate valuaton by relaxing the assumption of La Porta＇s model in this paper. There exists a positive relation between investor protection and corporate valuation. Our empirical research shows that this relation is significantly positive indeed.

关键词： Investor protection Corporate valuation Ownership structure Cross-Listing Splitting of corporate ownership

Value Assessment of Airport Billboards Based on Passenger Big Data

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Journal of Systems Science and Systems Engineering 2022年第3期31卷 381-392页

作者： Jianliang Mu Xinyue Cai Yongbo Xiao school of Economics and management Beihang UniversityBeijing 100191China Research Center for Contemporary management School of Economics and ManagementTsinghua UniversityBeijing 100084China

As an important element of the airport ecosystem,airport billboards are playing a crucial role in publicizing the city image and facilitating humanistic airport *** the same time,airport billboards have great commercial value and is a popular channel for enterprises to prompt their products and to build their brand ***,most airports in China adopt a simple fixed pricing mechanism for airport ***,for any type of billboard,the advertising price is mainly determined by considering historical prices and the total passenger flow of the entire airport during a whole ***,this seemingly crude pricing mechanism only considers macro-level data of passenger flow and fails in reflecting the real value of billboards in different locations effectively,since the value of a particular billboard depends not only on its media form,but also on the number of passengers flowing through and whether these passengers are the target customers of the advertising *** on big data on airport layout,flight information,and passenger attributes,this paper proposes a time-and location-based value assessment model for airport *** sample data collected from the Beijing Capital International Airport,the assessment model is adopted to evaluate the value of two real billboards in Terminal *** of this model can reflect the difference in the value of airport billboards located in different spots during various ***,this model provides a solid foundation for airport executives to develop differentiated/dynamic pricing and flexible advertisement scheduling strategies,thereby improving the overall efficiency.

关键词： Airport billboards value assessment passenger big data passenger portrait advertisement pricing

How to Promote Sales: Discount Promotion or Coupon Promotion?

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Journal of Systems Science and Systems Engineering 2020年第4期29卷 381-399页

作者： Peng Wiang Rong Du Qiying Hu school of Economics and management Xidian UniversityXi'an 710126China school of management Fudan UniversityShanghai 200433China

In this paper,we examine how a merchant should choose between discount promotion(offering a discount through an online third-party promotion platform)and coupon promotion(ssuing on-package coupons directly to consumers).We develop a two-period model in which the merchant optimizes the promotion decision in the first period and does not promote in the second *** identify two consumer segments:informed consumers who are aware of the merchant's offering at the beginning of the first period and know the true quality of the product,and uninformed consumers who are not aware of the merchant's offering at the beginning of the first period and underestimate the product ***,the merchant has access only to informed consumers when adopting coupon promotion or when choosing not to promote,while the merchant can access both informed consumers and uninformed consumers when offering discount *** this setting,we find that the merchant should offer discount promotion when the quality estimation of uninformed consumers is large and/or when the proportion of informed consumers is small;otherwise,the merchant should adopt coupon promotion when the effect of coupons in the first period is large and choose not to promote when the effect of coupons in the first period is small.

关键词： Sales promotions on-package coupons coupon promotion discount promotion delayed in-centive