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In this paper, two modified PRP conjugate gradient methods which satisfy sufficient descent condition are proposed for solving unconstrained optimization problems. We develop two sufficient descent directions at every iteration. Under some suitable conditions, theoretical analysis shows that the algorithm is global convergence. Numerical results show that this method is effective in unconstrained...
Using very minimum frequency shift chirp (VMFS-chirp) signal as carrier, 1/3 continuous phase chirp keying (1/3-CPCK) has high bandwidth efficient and has been used in bandwidth-limited wireless communication. With high correlation between 1/3-CPCK carriers, the ability of noise suppression in 1/3-CPCK system was low. In order to solve this problem, an improved received method of 1/3-CPCK system was...
The courses on the history of scientific technology cover a variety of topics and subjects colorfully from their very beginnings. The main purpose of this article is to try to represent these complicated contents through pictures, audio and video resources to improve the efficiency of these courses and arouse the student interests in the history of scientific technology. In this article, the course...
Video coding performance relies on the coding parameters setting, yet at present there is lack of a quantitative description about how coding parameters and the interrelationship between the parameters affect the coding performance. So, this paper chooses some key parameters for H.264 standard, then defines rate-distortion cost function J as the measure of performance, analyses different combinations...
The authors review literature of Traditional Chinese Medicine on congestive heart failure treatment from 2005 to 2010 of CNKI database and analyze the common principle of treatment and prescription of Traditional Chinese Medicine by combining computer retrieval with artificially retrieval. The result of this study reflect the principle of treatment and law of taking medicine basically, hope to provide...
Theoretical gear calculations and coordinate measuring machines have been combined to provide an objective, quantitative method for inspecting bevel gears. Errors between the actual surface and the theoretical surface are measured in this way. Changes in the cutting or grinding machine setup are required to bring the errors within an acceptable tolerance. The deviations of the real tooth surfaces...
The human capital (HC) is the most important capital in the knowledge-based economy time, and the HC operations have certain impacts on enterprise performance. Based on the analysis of HC, HC operation and enterprise performance as well as literature research, the paper proposes the hypothesis of four dimensions of HC operations on effect of enterprise performance and constructs a structural equation...
Cooperative innovation is one of the important drive factors of supply chain (SC), and knowledge sharing is the foundation of the cooperative innovation of SC enterprises. Knowledge sharing among nodal enterprises can produce greater profits and realize cooperative effect. The paper analyzes the effect of knowledge sharing on the cooperative innovation performance, expressed as profit-making level,...
Knowledge transfer is an important function of inter-enterprise cooperative innovation. The paper briefly divides the knowledge characteristics in cooperative innovation as tacit, simple embeddedness, deep embeddedness, modular and path dependence, and examines the effect on knowledge transfer performance from knowledge characteristics through positive studies. After the data and statistical analysis,...
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