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Business Management and Electronic Information (BMEI), 2011 International Conference on

Date 13-15 May 2011

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Displaying Results 1 - 25 of 107
  • Spatial price equilibrium and food webs: The economics of predator-prey networks

    Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (123 KB) |  | HTML iconHTML  

    In this paper, we prove that the equilibrium of predator-prey networks is, in fact, a spatial price equilibrium. This result demonstrates the underlying economics of predator-prey relationships and interactions and provides a foundation for the formulation and analysis of complex food webs, which are nature's supply chains, through the formalism of network equilibrium. Moreover, it rigorously links the equilibrium conditions of commodity networks in which a product is produced, transported, and consumed, with those of ecological networks in which prey are consumed by predators. View full abstract»

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  • Impact of privacy and security on users' trust in ubiquitous commerce

    Page(s): 7 - 10
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (131 KB) |  | HTML iconHTML  

    This paper investigates the factors that influencing the adoption of ubiquitous commerce (u-commerce) focusing on users' trust in privacy and security. Specifically, a framework is developed to show the interrelationships among users' trust, privacy and security on the adoption of u-commerce. The precedent factors that affecting privacy and security are also analyzed, including technology familiarity, social presence, and legislation and policy. A survey method is developed in order to quantitatively measure these factors. A pilot study shows that the majority of these measurements are important to the adoption of ubiquitous commerce. The results will be beneficial to managers and ubiquitous commerce developers when make decisions on the development of the system; and thereby, accelerate the adoption of ubiquitous commerce. View full abstract»

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  • Road pricing for mitigating congestion and emission with a mixed integer program

    Page(s): 11 - 14
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (67 KB) |  | HTML iconHTML  

    In this paper, a bi-level model is proposed to mitigate both congestion and emission of transportation networks by implementing congestion pricing. Since the bi-level model is neither convex nor differentiable, the gradient based methods can hardly solve the problem for a global optimum. Therefore, we formulate the congestion pricing problem of simultaneous toll link and toll level optimization as a single-level optimization program with equilibrium constraints. Then the objective function, equilibrium constraints, the travel time functions, and toll location constraints are all linearized with mixed integer variables. As a result, the whole problem is formulated into a mixed-integer linear program, with can be solved for a global optimum. View full abstract»

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  • A model for determining optimal variable message sign locations

    Page(s): 15 - 19
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (138 KB) |  | HTML iconHTML  

    Variable message signs (VMS), a component of intelligent transportation system (ITS) technologies, have been more and more widely applied in urban traffic management. A new model to determine optimal locations for VMS has been proposed in this paper. First, the optimal VMS location problem is formulated as a bi-level programming problem which takes into account the interaction between VMS and network-wide traffic flow distribution. The upper level model of the bi-level problem aims at maximizing the benefits of the VMS system regarding the amount of information provided by VMS. The lower level model is a stochastic user equilibrium traffic assignment model. Second, the solution algorithm for the bi-level model is presented. Next, the validity of the new model is verified by numerical analyses through a case study. Research results of this paper provide a technical tool to make plausible decisions regarding optimal VMS location plans. View full abstract»

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  • Analysis of resilience for urban transit networks

    Page(s): 20 - 23
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (83 KB) |  | HTML iconHTML  

    One of cornerstones for urban transit planning and public transportation management is topological properties of transit network. Through analyzing the real transit networks, the conclusion was gotten that transit networks are robust against random vertex removal but considerably less robust against targeted removal of the highest-degree vertices. “Betweenness centrality” of transit networks was used to explain the conclusion obtained. The research approaches of this article can be directly applied to determining the public transit hub and evaluating the performance of the whole transit network. View full abstract»

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  • Research on the development of intellectual property economic under the new economic growth

    Page(s): 24 - 27
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (69 KB)  

    The 21st century is marked with a new trend towards new technological innovation, cross-cultural communication, globalization of economy, economization of knowledge and internationalized economic and commercial rules, which presents new challenges to the economic and social development of China and her enterprises' participation in the domestic and foreign markets. Intellectual property economy has become a new economic growth point and penetrated into the economic and social fields relating to the development of a country or regions' economy and its international competitiveness and promoting the progress of the whole society. The research is based on the new economic growth theory, adopting the methods of macroeconomics and mathematical economics, to do the research of the inner relation between the strength of intellectual property protection and the economic growth. It has pointed out the contribution of the intellectual property protection to the economic growth in China. On the base of the research, it has put forward the suggestions and measures to better the intellectual property economic of China. View full abstract»

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  • Location management with self-similar stream in mobile communication networks

    Page(s): 28 - 31
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (95 KB) |  | HTML iconHTML  

    The model of the mobile communication location management with self-similar stream is proposed. This paper investigates the model and proposes a probability formula of the count of the location areas for a mobile crossing by the density evolution method of vector Markov processes and overcoming analytic difficulty. These results provide a theoretical basis for quantitative evaluation of mobility management. View full abstract»

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  • Simulation of asphalt mixtures based on digital image using discrete element method

    Page(s): 32 - 36
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (270 KB) |  | HTML iconHTML  

    This paper firstly obtain coordinate geometry which can describe the internal structure of asphalt mixture using digital image processing technology, and then reconstruct model to simulate uniaxial compression test as well as analyze micromechanical properties after processing coordinate obtained using discrete element software. Constitutive laws within model are simplified as the interactions at contacts of discrete elements within a coarse aggregate, between coarse aggregates, within asphalt mastic, and between coarse aggregates and mastic. Each contact is described using a stiffness model, a bonding model and a slip model. The corresponding program are written to adjust above constitutive model parameters according to fish language. The best combination of microscale parameters is found after analyzing simulation results, it is observed that simulating constitutive behavior of asphalt mixtures using discrete element method is feasible. View full abstract»

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  • Relation of homogeneity and mechanical response of asphalt pavements

    Page(s): 37 - 41
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (86 KB) |  | HTML iconHTML  

    The degree of homogeneity determines directly the performance-related properties and service life of asphalt pavements, and influences the overall life cycle cost of pavement preservation. Homogeneity has been an index of asphalt pavement Quality Assurance (QA) / Quality Control (QC). At present the effect of homogeneity on the mechanical response of pavements has been investigated lesser, even homogeneity is paid much attention in the field. The purpose of this research is to study the relation of homogeneity and mechanical response of asphalt pavements. The basic assumptions were introduced in brief. The pavement structural models and structural parameters were also given. Finally based on multilayered elastic analysis software program BISAR, the relationship between homogeneity and the mechanical response of asphalt pavements was investigated via computing the stress, strain and displacement at the bottom of each structural layer. Results show that homogeneity influences the mechanical response of asphalt pavements; under the same vehicle load and natural environmental factors the displacement is more in flexible base asphalt pavement than in semi-rigid base asphalt pavement, and the tensile strain is more at the flexible base bottom than at the semi-rigid base bottom; the tensile stress almost always appears at the asphalt surface and the base bottom, and usually is more at the semi-rigid base asphalt surface than at the flexible base asphalt surface. View full abstract»

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  • A smoothed Latent Dirichlet Allocation model with application to Business Intelligence

    Page(s): 42 - 46
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (129 KB) |  | HTML iconHTML  

    As a kind of intelligent component, text classification plays an important role in Business Intelligence (BI) application such as client opinion classification, market feedback analysis and so on. Latent Dirichlet Allocation (LDA) model, which is a kind of excellent text representation model, has been widely used in various document processing applications. However, its performance is affected by the data sparseness problem. Existing smoothing techniques usually make use of statistic theory to assign a uniform distribution to absent words. They don't concern the real word distribution or distinguish between words. In this paper, a method based on Tolerance Rough Set Theory (TRST) is proposed, which makes use of upper approximation and lower approximation theory in Rough Set to assign different values for absent words in different approximation regions. Theoretically, our algorithms can estimate smoothing value for absent words according to their relation with respect to existing words. Text classification experiments on public corpora have shown that our algorithms greatly improve the performance of LDA model, especially for unbalanced corpus. View full abstract»

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  • Difficulty and breakthrough: Analytical framework of EGS-oriented Consumer Logistics outsourcing based on principal-agent theory

    Page(s): 47 - 51
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (80 KB) |  | HTML iconHTML  

    With emergence of EGS, many self-service logistics activities are being outsourced to E-Grocers by traditional grocery shoppers, which results in a difficulty to complete consumer logistics. Therefore, this study, first of all, analyses the difficulty of Consumer Logistics outsourcing, then explained based on theoretical framework of principal-agent theory, and a mathematical model of incentive contract is constructed. Finally, the breakthrough ways are put forward to avoid the moral hazard. View full abstract»

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  • Supply chain competition based on customer utility

    Page(s): 52 - 56
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (235 KB) |  | HTML iconHTML  

    As one of the most important management theories in recent five decades, supply chain management has caught much attention. The study on supply chain competition is of great theoretical and realistic significance. Based on analyzing the factors that affect customer utility, the formation procedure of market share is illustrated and a supply chain competition model is established accordingly. In order to obtain the optimum response strategy and supply chain competition equilibrium, corresponding algorithm and measures are proposed. Numerical examples are given to illustrate how different sceneries affect the supply chain competition equilibrium. View full abstract»

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  • Identifying the joint demand function with copula structure in bankcard market

    Page(s): 57 - 61
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (208 KB) |  | HTML iconHTML  

    Payment card industry is distinguished with its two-sided nature and the demand for payment card service is called joint demand. This article applies Copula functions to capture the non-linear and complex relationship between marginal demands, and moreover, estimates the joint demand function in China's payment card industry, only to find that the t Copula function fits the relationship between issuing market and acquiring market. The joint demand function in China's payment card market increases in the issuing market demand while it does not response sensitively to the acquiring market demand, and the profound and realistic reason lies in the distorted profit distribution system. The pattern of overvaluing issuing market but undervaluing acquiring market is unsustainable, and a secondary reform in payment card industry is definitely needed. View full abstract»

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  • Bertrand game model and its equilibrium analysis based on RDEU theory

    Page(s): 62 - 65
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (95 KB) |  | HTML iconHTML  

    The current researches on oligarchic price competition model are on the premise of rational players, but there are larger deviations between the results and realities. In the framework of RDEU decision theory, the paper makes a new study on Bertrand price game model. Then it constructs a RDEU-Bertrand game model containing incomplete information of players' emotional preferences by the introduction of emotional factors reflecting their interactions under different risk preferences. At last it determines Nash equilibrium, and makes an analysis of dynamic evolution on it by numerical simulation. View full abstract»

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  • Adaptive transport network model based on sparse matrix process technics

    Page(s): 66 - 69
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (183 KB)  

    In order to solve the sparse matrix linear equations problem in the simulation of area transportation activity, we provide here two process methods for sparse matrix in biological adaptive transport network model. At the end of this paper, we present a simple numerical example to show the efficiency of the methods we provide. View full abstract»

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  • Study on the upgrading of China's outsourcing industrial Clusters from network perspective

    Page(s): 70 - 73
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (103 KB) |  | HTML iconHTML  

    The outsourcing industrial Cluster is an open network embedding in the global value chain. Although China's outsourcing industrial clusters have achieved rapid development in recent years, they have to enforce their international competiveness to compete with international leading industrial clusters. From network perspective, the paper studies the type and necessity to upgrade of China's outsourcing industrial clusters, and proposes the upgrading strategy of China's outsourcing industrial clusters. Finally, the paper analyzes and makes use of the upgrading experiences of Bangalore outsourcing industrial cluster. View full abstract»

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  • Multimodal traffic equilibrium model based on traveler's combined choice within super-network

    Page(s): 74 - 80
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (163 KB)  

    The urban multimodal transport system is a regular pattern of superposition and compound of different transport modes such as car, bus and bike. In this paper, the structure of such system is fully analyzed and a super-network topology model is proposed to describe it. The traveler's combined choice behaviors (including mode choice and route choice) are then analyzed. Accordingly, the generalized travel cost is modeled while both traveler's properties and mode's properties are included. Simultaneously, the link impedance function based on travel demand is formulated while the interferences between different modes are taken into account. On the basis of these, a variational inequality model is then proposed to describe multi-user equilibrium assignment for multimodal transport system. The solution algorithm is also presented. Finally, a numerical example is provided to illustrate the model and algorithm. View full abstract»

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  • Robustness analysis and simulation of knowledge networks based on knowledge flows

    Page(s): 81 - 86
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (135 KB) |  | HTML iconHTML  

    In this paper, we develop an analyzing and evaluating robustness model of knowledge networks to capture the nature of robustness in the knowledge networks. We adopt 5 types of removing strategies based on knowledge flows to compare the robustness of knowledge networks, then analyze the robustness of knowledge networks under global and local information conditions. Simulation method was used to get the result of robustness of knowledge networks based on different removing strategies, different information conditions, and different degree of knowledge networks. View full abstract»

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  • Empirical research of enterprise strategic risk evaluation based on wavelet network

    Page(s): 87 - 93
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (91 KB) |  | HTML iconHTML  

    Based on concept of enterprise strategic risk, a risk evaluation index system is set up which consists of five elements, including financial condition, market competition, enterprise resource, enterprise capability and business process firstly. Secondly, a corresponding comprehensive evaluation method based on wavelet network is proposed in detail for enterprise strategic risk evaluation. An empirical research for strategic risk evaluation was discussed by using the suggested method. Obviously, the application result of the method was comparatively more objective. Finally, the comparison between the mentioned approach and BPNN was discussed. It indicated that the method not only can evaluate enterprise strategic risk effectively and avoid some man-made mistakes, but also has better effective and efficient than BPNN. View full abstract»

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  • Research on vehicle intelligent communication based on supernetwork system

    Page(s): 94 - 98
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (168 KB) |  | HTML iconHTML  

    Modern cars are integrated with more and more electronic devices, controllers, sensors, actuators, bring more convenience, comfort and safety to the driver. Therefore, the active safety, connectivity, intelligence has become a main direction of research and development on the future cars, and these are based on the complex communication system established inside and outside the vehicle, which constitute a supernetwork. This paper proposes a vehicle communication system architecture based on supernetwork, including interior, exterior communication network, covering three major content, in-vehicle bus network, human to vehicle, vehicle to road communication, and some solutions on the key points specific. Description in the paper is already built to specification, and integrated in the test samples of the related electric control system on the demo vehicle. Set up and verified the backbone of the whole super-net. View full abstract»

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  • Research of PCE based on the time-headway

    Page(s): 99 - 102
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (89 KB) |  | HTML iconHTML  

    Vehicles in a queue affect each other, so the record of time-headway was made in motorcades. 377 data groups of time-headway were collected at north Jia Song Road in shanghai using stopwatch. The research was calibrated on “steady-flow” traffic operations. Vehicle arrangement has direct impact on time-headway and was a function of the proportion of trucks and trailers and the number of highway lanes. On the analysis, a function for the time-headway was created using proportion of trucks and trailers and the number of highway lanes. Time-headway is also the function of speed. The 2 dimensional charts indicates that when the speed gets to 45km / h or 75km / h, the trend line turns. The research also indicates that the passenger car equivalent(PCE) of unit passenger cars is no longer 1.00 when it comes to collective act. View full abstract»

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  • The evaluation method of road traffic safety based on the combined Principal Component Cluster analysis

    Page(s): 103 - 107
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (161 KB) |  | HTML iconHTML  

    On purpose of scientifically and reasonably evaluating the present state of traffic safety, the improved Principal Component analysis and Cluster analysis are combined and the deficiency of existence of negative variation coefficient in Principal Component analysis could be made up by value assignment analysis. First of all, the synthesis evaluation indicators system is constructed based on nine relative indicators such as mortality rate per ten thousand vehicles, injury rate per ten thousand vehicles, mortality rate per million people, injury rate per million people, crash frequency per mile, extra serious accident frequency per mile and so on, which could comprehensively reflect the safety of road traffic. Then, the data from the eastern provinces of China in 2009 are synthetically evaluated step by step as an example by applying the traditional and improved Principal Component analysis methods. Lastly, the evaluation results are compared and analyzed according to the differences between these two methods by the Cluster analysis method. View full abstract»

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  • Passenger flow assignment model in comprehensive transportation network based on connection and transfer efficiency in distribution nodes

    Page(s): 108 - 112
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (210 KB) |  | HTML iconHTML  

    From the angle of whole trip chain, the paper constructs the passenger flow assignment model in comprehensive transportation network based on the general cost equilibrium through full consideration of the passengers' trip behavioral characteristics. In this model, it is proposed that connection and transfer efficiency among the different transportation modes and urban traffic modes in distribution nodes should be taken into account, whose quantization method and mathematical network transformation method of general cost are also proposed. To solve the model, general cost-flow function is firstly constructed based on different modes and connection-transfer system through considering the links' controlling modes and managing characteristics and the assignment result is obtained through applying the iteration method of all-or-nothing. Finally, the comparative analysis is carried out through taking the comprehensive transportation networks in the Guanzhong-Tianshui economic area as a case to prove the model's validity and Practicality. View full abstract»

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  • Price competition between intercity railway and bus

    Page(s): 113 - 116
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (192 KB) |  | HTML iconHTML  

    Ticket price is the key factor in the competition between intercity railway and bus. The relationship between intercity transit demand is set up according to the ticket prices. Logit model is used to establish the mode split in intercity transit system. Then the profit functions of both companies are presented. Based on the profit functions, a price game model is prop0sed to discuss the competition between intercity railway and bus. The existence and computing method of the Nash equilibrium price solutions are proposed. The conclusions of this research are useful to managers for their operations with intercity public transit system. View full abstract»

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  • Research on traditional industry transformation mechanism based on system dynamic model

    Page(s): 117 - 122
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (118 KB) |  | HTML iconHTML  

    On the basic of comprehensive and systematic study on the mechanism of the traditional manufacturing industry transformation, this paper is to establish the systems dynamics model of the traditional manufacturing industry transformation According to different modes of the transformation, it designs corresponding plan. It applies the software-Vensim to do the simulation analysis by use of the actual economic data of Baoshan. Then it systematically analyzes and evaluates the relative index after the simulations, so that we can get the preferred plan and suggestions. View full abstract»

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