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According to the analysis on character of enterprise's IT service outsourcing risk, a system dynamics approach is put forward to study enterprise's IT service outsourcing risk in this paper. On the basis of analyzing system target and boundary, the model on system dynamics of IT service outsourcing risk is established, which is combined with risk sub-system, risk control policy sub-system and risk...
Informative advertising as one of widespread strategies in e-commerce platforms is used for attracting more agents of different sides on board. In this paper, we build a two-stage model to analyze the efficient of informative advertising on equilibrium prices and profit based on two-sided markets theory. In the case of completely covered agent s' markets, we conclude e-commerce platforms with higher...
A thorough research having been done on the previous researches in this field, the internal relationship between the highway post-evaluation indicator systems is figured out. In this paper, a comprehensive and systematic method is proposed to do the highway post-evaluation by using the structural equation model and the indicator systems and models are also construed. The results of the theoretical...
High frequency stock return data tend to exhibit characteristics such as volatility clustering, volatility persistence, leverage effects, and properties of abnormal unconditional distributions reflected in the form of skewness, high peakedness, and excess kurtosis. Although traditional GARCH models that employ leptokurtic distributions have been found useful to account for the conditional heteroscedasticity...
With Chinese rapid economic and social development, cities are facing with water scarcity and deteriorating water environment, the sewage treatment engineering has become an increasing concern. Facing the large investment and construction of sewage treatment, operation and management difficulties, the incomplete cost system and the status of backward technology in northern cities of China, using the...
Effectively use of intelligent transport system (ITS) can not only improve vehicular safety but also enhance the efficiency of current transport system and driving comfort. The key point of ITS is how vehicles communicate with each other, which means we need a set of communication protocols to facilitate moving vehicles. For this reason, IEEE developed WAVE (Wireless Access in Vehicular Environment)...
Through analyzing non-linear, time-varying characteristics of the economic system and summing up the basic idea of nonlinear economic model, BP neural network is used to do non-linear economic modeling methodology and specific implementation steps, by which new ideas is put forward for the existence of model, and implementation of the circumstances in Matlab is given.
Maintenance plays an important role in keeping the availability of civilian and military equipments at a satisfactory level. The issue, which decision maker is most concerned about, is how to keep the availability at a satisfactory level with less maintenance cost. In this study, we propose a simulation-optimization approach to spare parts allocation based on decision-maker's satisfaction. Firstly,...
To construct a reasonable numerical model of arterial flow, the selection of boundary conditions in hemodynamics was analyzed, and then the certain solution conditions were presented. Based on the selection, the parameters of thoracic aorta were employed, and numerical calculations of steady and unsteady flows were performed. The results indicate that boundary conditions have a significant effect...
A three dimensional groundwater flow model is built based on the analysis of hydrogeological conditions of a large irrigation district and all the parameters are determined by the model in 5 sub-domains of the irrigation district. The reliability of the model is tested by long series historical groundwater monitoring data and the model is then used for the analysis of centralized groundwater exploitation...
An effective foreign exchange (Forex) trading decision is usually dependent on effective forex forecasting. This paper reports empirical evidence that an artificial neural network (ANN) is applicable to the prediction of foreign exchange rates. The architecture of the network and the related algorithms are described. The effects of the choice of inputs into a neural network model are examined. Except...
In this paper, the city input-output efficiency analysis which includes electric power input has been done based on the extension models of DEA to Chinapsilas typical cities. At first, it established index system of comprehensive evaluation of city efficiency, and did input-output-effectiveness evaluation which include electric power input for China's 23 cities in 2006 and sorted by the urban development...
Nowadays, the most popular peer-to-peer applications operate on unstructured networks. This paper describes our research effort to design and implement an ecology-based model allows for searching in P2P network. We models autonomous adaptive agents after several ecological concepts and mechanisms. We focus on the problem of actively changing the topology of the P2P network by utilizing Schellingpsilas...
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