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Community structure is a very important property of complex networks. Detecting communities in networks is of great importance in biology, computer science, sociology and so on. In recent years, peer-to-peer (P2P) networks have gained a lot of popularity, but it is still quite difficult to acquire global statistical information. Studying community structure will help researchers use partial statistical...
With the development of information processing technology, DCT has been used more and more widely and the research on DCT algorithm is very much too. But the physical performance of DCT is unclear. To overcome such drawbacks, the paper has proposed 1-D SDCT operation method. First, some new 1-D matrix operation principles are defined. Then, the transform basic matrix used for 1-D SDCT operation was...
In the analysis of Protein-Protein Interaction (PPI) network, one intriguing problem is the reason for centrality-lethality rule. To discover the relationship between topological properties and functional features of proteins in PPI network, we classified hub proteins into two types: essential hub and nonessential hub and combined proteins' topological structure and evolutionary rate information together...
One of the most important problems in biology is to discover the relationship between topological properties and functional features of proteins in Protein-Protein Interaction (PPI) network. The centrality-lethality rule reveals that hub proteins tend to be more essential than non-hub proteins. Why hub proteins tend to be more essential? Here, we classified hub proteins into two types: essential hub...
As an important part of Protection of national energy security, most petro reserves has been widely attention by developed and emerging developing countries. It is the common practice in the economic and social development process for the Countries in the world to save fuel, improve the efficiency of petro, reduce excessive reliance of economic development on petro as far as possible. To demonstrate...
PGC demodulation method is often used for interferential fiber-optic sensors. We want to use the lowest sample frequency that is effectual during digital processing. We theoretically analyzed the disposal process in detail and found that not all the frequency components of input signal are essential for demodulation. We found the lowest sample frequency and the analytic conclusion is simulated and...
This paper presents a universal steganalysis scheme to detect popular JPEG steganography effectively. First, a new kind of transition probability matrix is constructed to describe correlations of the quantized DCT coefficients in the multi-directions. Second, by merging two different calibrations, a 96-dimensional feature vector is extracted, and then the SVM is trained to build the steganalyzer....
According to the problem of acquisition error for high dynamic direct sequence spread spectrum signals, a new compensation method is presented to guarantee acquisition phase accuracy of PN code. In this method, the acquisition result of Doppler frequency is used to compensate acquisition phase of PN code based on processing time of acquisition and start-up time of tracking. Analysis and simulation...
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