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More and more software applications are developed within a software ecosystem (SECO), such as the Face book ecosystem and the iPhone AppStore. A core asset of a software ecosystem is its users, and the behavior of the users strongly affects the decisions of software vendors. The number of active users reflects user satisfaction and quality of the applications in a SECO. However, we can hardly find...
The equations of the Complete Fourier Direct (CFD) MR model are explicitly derived for diffusion weighted NMR experiments. The CFD-MR theory is validated by comparing a biological phantom constructed from nerve bundles and agar gel with its numerical implementation. The displacement integral distribution function estimated from the experimental data is in high agreement with the numerical phantom...
Based on the former researches by minimum method on the impacts of the ecological impact factors (water depth, water temperature, substrate, et al) on suitability indices of adult fish growth, spawning and hatch, we calculate the habitat suitability indices by the parallel method, and use different simulation equations (polynomial equation, exponential equation, logistic equation, et al) to compare...
In the present study we reported the feasibility of extra cellular biopolymer( PFC02) produced by Pseudomonas alcaligenes as an alternative biosorbent to remove Co(II) metallic ions from environmental and industrial wastewater. The effects such as pH, dosage of biosorbent, Co(II) initial concentration and sorbate-sorbent contact time and agitating speed on the adsorption capacities of PFC02 were studied...
Requirements evolution is one of critical problems influencing software engineering activities. Despite there is much research on requirements evolution, there still lacks quantitative understanding of requirements evolution. In this paper, we quantitatively analyze requirements evolution across multiple versions of an industrial software product. Based on data of requirements evolution and defects,...
Field observations in high frequent harmful algal bloom (HAB) occurrence area around Yangtze River Estuary show that during HAB, nutrients concentration and their distribution are the main factors leading to the population succession between two main dominant HAB species, Skeletonema costatum and Prorocentrum donghaiense. Based on such a succession mechanism, a HAB ecological mathematical model is...
In order to scientifically and objectively evaluate resource-based cities innovation capacity, the entropy is adopted to select the evaluation indexes, whose weights are then determined by analytic network process (ANP) model. This method is applied to evaluate Daqing's innovative capacity since 1998 to 2005. The result shows that the city's innovative capacity improved itself annually. The method...
A prototype signal processing system of FPGA embedded multicore platform is presented to evaluate the performance and efficiency of signal processing on embedded multicore platform. The multicore processing algorithms of GSM and ADPCM are implemented. For the requirements in embedded applications, we point out the performance difference that come from the various processor core number and bus width,...
Based on the early warning theory of the real estate and divided by the science classification, presently used real estate early warning methods are generalized as the business cycle & quantitative statistic method, econometric method and non-linearity & systems approach. And the business cycle analysis, pattern recognition, ARCH, Hedonic, ANN, SWARM methods are summarized. The results show...
It is important for most oil companies to focus on the core assets which are oil and gas reserves so as to avoid risk posed by some factors such as oil prices and costs, etc. This paper will set up a model related to investment in upstream business based on system dynamics principles and predict the size and structure of investment in upstream business with computer simulation method. It demonstrates...
In order to escape of risk and gain high returns, it is important for oil companies to determine the scale and structure of investment in upstream business. By introducing system dynamic principles, this paper builds a system dynamics model of upstream investment decision on basis of the oil company's practice in China. Empirical results show that total investment scale will decline and the proportion...
By means of analyzing Yong's minimax portfolio selection model, a novel risk function is introduced with risk measure considering risk and extra return factors. The risk factor can tune the effects of asset yield on the investment decision, and the extra return factor can control the effects of assets portfolio's margin on the investment decision. Furthermore, an assets portfolio optimization model...
The development of information society is in urgent need of a large number of inter-disciplinary innovative talents for information-based entrepreneurship. The knowledge system applicable to inter-disciplinary innovative talents for information-based entrepreneurship is not only the standards for us to cultivate and train such talents but also the criteria to evaluate the talents' capabilities. To...
While an earthquake occurs especially in depressed areas or mountainous regions, the survey of damage loss becomes arduous because of chaos and awful communication condition. A solution is proposed that using RS (remote sensing) and GIS (Geographic Information System) techniques assesses seismic damage loss for emergency, which need establish a spatial database to store the necessary data. In this...
In China, the effect of air pollution on human health has been widely concerned and the acknowledge of health effects of air pollution has become the important basis of making related environmental control policies. This paper brought air pollution factors into health production function model and utilized related statistical data to evaluate the effect of air pollution on human health in China. The...
A model reduction method to match the coefficient of the transfer function G(s) of descriptor system is presented to obtain reduced order descriptor system. By projecting G(s) to the transfer function of discrete time system, the model reduction problem for the descriptor system is transformed to Markov parameters matching model reduction problem of the corresponding discrete time normal systems....
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