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Considering the nonlinearity and strong coupling of Stewart platform, a co-evolutionary control method is proposed for it, based on this method, ?? distribution function is introduced to regulate the probabilities of individuals production to promote the speed of evolutionary according to the characteristic of control system. Compared with the traditional genetic algorithm, the searching space has...
Based on the study of patterns used in many fast algorithms for the block-matching motion estimation (BMME), a new search pattern, LP (line search pattern), was introduced in this paper. LP is also a simplified square search pattern as TP(Triangle search Pattern). By combing LP with DP(diamond search pattern), a fast BMA (BMME Algorithm), DLS (diamond-line search), was also proposed in this paper...
It is well known that H.264/AVC has great advantage of coding efficiency compared with the successful prior coding standards and it can save about 50% bit-rate under the same reconstructed picture quality. But the complexity of H.264/AVC encoder is also very high and it limits the application of H.264/AVC in the domain of real time video communication. Based on some observations in the experiments,...
The motion search algorithm based on zero-block detection was successfully used in H.263, H.26L etc to accelerate the speed of video coding. H.264/AVC is also a video coding scheme based on motion estimation and prediction, so the motion search method based on zero-block detection will also be effective to speed up its video coding. The key of such method is to select the exact threshold for the zero-block...
Genetic algorithm was employed to optimize the structures of (C60)N molecular clusters with the lowest energy. Aiming at an effective solution of stable structures, some improvements are made to traditional genetic algorithm. Firstly, gene is coded by the mixed method (real number and integral number) for initialized population quality. Secondly, a new selection mechanism based on roulette wheel and...
In this paper, we present a novel evolutionary algorithm for dynamic risk grading of major hazards, which can be called DRGEA for short. And we detail the construction theory of DRGEA from many aspects such as individual encoding, evolutionary operators, fitness function and so forth. In the numerical experiment, DRGEA is used to solve a practical problem about dynamic risk grading of major hazards...
The H.264 standard achieves much higher coding efficiency than the MPEG-4 standard, due to its improved inter-and intra-prediction modes at the expense of higher computational complexity. Motion estimation is allowed to use seven kinds of block sizes to improve the rate-distortion performance. This new feature has achieved significant coding gain compared to coding a macroblock using fixed block size...
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