Advanced Materials Research Vol. 977

Abstract: Information science focuses on understanding problems from the perspective of the stake holders involved and then applying information and other technologies as needed. A necessary and sufficient condition is identified in term of refinement masks for applying the unitary extension principle for periodic functions to construct tight wavelet frames. Then a theory on the approxi-mation order of truncated tight frame series is established, which facilitates construction of tight periodic wavelet frames with desirable approximation order. The pyramid decomposition scheme is derived based on the generalized multiresolution structure.

Abstract: Firstly, this paper compares the traditional risk identification methods and puts forward a point of view that system dynamics method is a supplement to the traditional risk identification methods. Secondly, we put the railway construction project schedule risk stage for research, establish a system dynamics model, use the software to identify causes of schedule risk in detail, and analyze the system self-regulating effect on schedule risk system. Finally, Using the Wuzhun railway data from Mount Huangshan to Wucaiwan to verify, we can prove the availability of system dynamics model in the railway construction project risk identification.

Abstract: Constructing a model of the technological industry value chain by the use of Potter's value chain theory, to reveal the realization mechanism of the value added of technology industry value chain. Describes the characteristics of technology industry value chain, analysis of the causes of the ‘Valley of Death’ and ‘Darwin Sea’ produced, then give suggestions to resolve these problems.

Abstract: Rational equity structure is the key to improve the operating performance. On the basis of the basic theory of international experts, the paper selects the data of utilities listed companies, and takes the principal component analysis and multiple linear regression model to build the index system of utilities for evaluating the operating performance after a series of data processing methods, at last, conducts the empirical analysis of the relationship between equity structure and operating performance. The results show that there is no significant correlation between the proportion of the state-owned restricted shares and the company's profitability; there is a positive correlation between the proportion of outstanding shares and the company’s profitability. Accordingly, the paper proposes some recommendations on management engineering at last to improve the company’s operating performance and the efficiency of management engineering.