Xingkai Yang

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Species selection, covariation of species' traits with their net diversification rates, is an important component of macroevolution. Most studies have relied on indirect evidence for its operation and have not quantified its strength relative to other macroevolutionary forces. We use an extension of the Price equation to quantify the mechanisms of body size(More)
Aiming at government horizon business integration that has becoming a focus problem in the field of e-government, the hierarchical role network model (HRNM) is presented in this paper. The HRNM is considered as the management and control model of horizon business integration. Furthermore, the architecture of the government horizon business integration(More)
The integration of E-government information resources becomes more and more hot issue today. This paper presents a new information exchange multi-agent model. In this model each data exchange node serves as a basic organization which can send and receive information automatically and store the information. Multi-agents cooperate to realize the exchange and(More)
E-commerce based on network has not only changed people's way of purchasing, but also bring about tremendous impact on the process of production and management, on people's life and employment, on government function, legal system and education. This article tries to offer a general view on the protection of the right to knowledge and the right to privacy(More)
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