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Guided by H.M.M. Markowitz portfolio theory, this paper postulates that the security market permits or prohibit short sale. Then based on the bi-objective of the maximal return at minimal risk, this paper sets up the investment utility function through linear weighted sums method, and makes first derivation about the function by method of Lagrange multiplier and determines the vector of investment...
Service has already become one of the most important value activities of modern enterprises in various industries. A better service management requires a comprehensive understanding of enterprises' capability. According to the fundamental characteristics of Chinese enterprises, this article constructed enterprise capability evaluating model (ECEM) and enterprise capability evolutionary model (ECEVM)...
In order to obtain the greatest economic benefit of synthetic circuit with the minimum energy consumption of the unit methanol, this paper analyzes the mechanism of the methanol synthesis, brings forward a control algorithm based on chain system, finds out two major factors which affect the energy consumption and output, builds a chain system model made up of two related chains and designs the prediction...
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