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Based on the sample of International-trade listed corporations, this paper builds the SFA(Stochastic Frontier Analysis) model and makes an empirical analysis on the technical efficiency of China's foreign trade enterprises. As is indicated in the result, the technical efficiency of China's foreign trade enterprises is extremely low. Besides, ownership structure poses a positive impact on the efficiency,...
The principal-agent relationship between client and agency (project supervisor) under the scientific project supervision institution model is analyzed by applying the three-stage dynamic game and “principal—agent theory”. Two types of function analysis model are established according to different hypothesis, and the players' action and choices are analyzed. Well-connected designing of interior and...
Due to the separation of the radar transmitter and receiver, the channel mismatch, the time and phase synchronization error between synthetic aperture radar (SAR) central electronic equipments (CEE) is the key problems of spaceborne distributed SAR system compared with the traditional single-satellite double pass interferometric SAR (InSAR) system, which has to be considered in the SAR system design,...
In the paper, the process of modeling configuration system is evolved into simple linking relationship of many engineering modules on the basis of XDPS configuration, to complete modeling and simulation of desulfurization system, and verify the accuracy of the simulation system. The paper discusses principles and process of wet limestone-based desulphurization system in coal-burning power plant by...
In this paper, based on finite element theory, the key factors of air spring simulation are analyzed. An air spring simulation model is set up by using Rebar element and Fluid element in ABAQUS. The key points for modeling are pointed out by taking an example of 644N air spring. The agreement between the simulation results and the experimental data shows that the air spring simulation method is useful...
As less attention has been devoted to land scattering in high-resolution SAR, especially satellite image, a comprehensive statistical analysis of COSMO/SkyMed SAR data is carried out in this paper. The images of different land types (such as bare soil, grassland, water, forestland, urban area and farmland) are analyzed by means of histogram, kurtosis and covariance estimation. As the experimental...
The advanced modular avionics system is composed of disordered and distributed components. But the need of integrated is exigent. So blueprint as a global system satisfies the demand, and become an important part of avionics system. This paper provides an improved blueprint architecture, which first models the conception based on generalized stochastic Petri nets (GSPN), and provides a new idea for...
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