Applied Mechanics and Materials Vols. 543-547

Abstract: A robust mean-variance portfolio selection model with transaction cost is presented for the case that both risky and risk-free assets exist in the market and expected returns of assets are uncertain and belong to a convex polyhedron. The model helps investors to identify such portfolios that expectations of investors are ensured even if the worst case in the expected returns of assets occurs. Analytical expression of the optimal portfolio determined by the proposed model is derived based on the Lagrange method for constrained optimization. Empirical analysis with three real stocks is performed to give the efficient frontier of portfolios.

Abstract: Music education is an important part of quality education, evaluation on music teachers professional quality effectively is both an important part of school work and an important condition for the growth and development of music teachers. This paper uses fuzzy comprehensive evaluation method to carry on research due to the difficult problems in teachers quality evaluation. We should focus on the evaluation ways after built an evaluation indication system and weight. The evaluation ways create a mathematical model of fuzzy comprehensive evaluation according to the solving steps of problem domain and then evaluate four music teachers professional quality in accordance with solving steps. Content of this study is important for the improvement of music teachers quality, the establishment of high-quality music teachers and the development of music education and other aspects.

Abstract: Hub-and-Spoke network that originated from the aircraft industry of USA has aroused the extensive concern from the business and academic circles. The range of Hub-and-Spoke network application extended to other scopes such as transportation and tourisms. On account of the obvious advantages of scale merit, agglomeration economies and space efficiency. Hub-and-Spoke network has been testified the effective organizational forms in the actual operation from the freights transportation to the production organization. Many research results about the Hub-and-Spoke network have been received presently, but there is rarely research on the applications of logistics industry, the formative mechanism, the combination with the regional economic policy etc under the special regional environment.

Abstract: Fuzzy synthetic evaluation method is used to evaluate the drivers hazard perception., evaluation system is set up taking drivers psychological for hazard perception, the identification of hazard factor, hazard attitude as the criterion level. The indexs weight coefficient is determined by the analytic hierarchy process, and the fuzzy synthetic evaluation model is established. Through the model testing, if the driver's hazard perception ability evaluation result is good, according to the principle of maximum membership, it is shown that the driving experience, which is beneficial to the forming of the mature hazard perception psychology, the drivers hazard factors identification index deduced from the virtual scene experiment influenced the hazard perception ability deeply. Seen from the distribution of driver hazard perception level, the professional drivers and amateur drivers has the very big difference, so professional training and work experience are benefit for the driver's hazard perception ability.

Abstract: According to the principle of construction of the evaluation system, this paper established the corresponding evaluation indexes of the three aspects of equipment supply for user of universal radar equipment supporting: prepare, reserve, supply. There are 13 indexes. This paper establishes a set of index system more scientific, comprehensive, reasonable and hierarchical structure, and to conduct a comprehensive evaluation index system according to the method of AHP and variable weight fuzzy comprehensive assessment. In the end, this paper proves the rationality of index system and evaluation model.

Abstract: According to the calculation of the actual efficiency of electric vehicles, it can be found that the electric vehicles cannot save energy as what the companies have promised in their advertisements. Their incompetence is especially obvious when compared with the diesel-powered vehicles and gasoline-powered vehicles that are widely used in China. In the process of discussing the performance and the energy consumption of electric vehicles, doubts are raised whether electric vehicles are environmentally-friendly under the circumstance of the Chinese electric power system.

Abstract: Integrated logistics platform based on the computer ebaluation system. It services for e-commerce businesses on the platform in the way of helping them choosing a better logistics service. In this paper, we explained the business allocation methods on the platform of integrated logistics, and on this basis, to build a business distribution mathematical model that helps make rational choices for enterprise logistics services provided.

Abstract: Tourism resources are not only the object of tourism activities, but also is the foundation of tourism existence and development in a country or region. With the development of economy, the progress of science and technology, great change has taken place for tourism resources in new era. It is necessary to refresh the connotation, denotation, and properties of tourism resources, and the concept of sustainable development of tourism resources. It has great significance for the development of tourism theory and industry.

Abstract: The reasonable benefit distribution of the enterprise information technology platform is the guarantee to make the platform effective operation. First of all, according to the enterprise operation characteristics, the paper analyzes the indicator system of interests distribution; second, from the factors of risk and cost, it establishes the mathematical model of profit distribution; finally, game theory technology is used to calculate the effectiveness of the model.

Abstract: Urban passenger statistics is an important part of the social economic statistics, as an important part of urban passenger, the difference between supply and demand of taxi will directly impact the quality of residents' travel. The taxi passenger demand is forecasted according to the peoples travel conditions. The taximeter data survey method based on a fixed sample sampling and supplemented by the carpooling survey is put forward to determine the supply of taxi passenger. The difference between supply and demand of taxi passenger is analyzed. Accordingly, the result of the case analysis shows that analysis between supply and demand of taxi passenger provides strong support for government urban passenger management and control and be of great significance on theory and practice to the development of urban passenger transport industry.