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OFDMA (Orthogonal Frequency Division Multiple Access) is the key technology of the fourth-generation mobile communication and has been applied to many communication standards. In this paper, genetic algorithm (GA) is applied to channel allocation of OFDMA system and is improved from three aspects: initial population, fitness function and user fairness. At the same time, combining improved genetic...
Reactive power optimization in power system can not only reduce power loss, but also improve voltage quality. It is a mixed optimizing question, which its operating variables include the continual and the separate, its solved process is quite complex. The genetic algorithm (GA) is used to solve this problem, but the GA easy to fall into local optimum problem with the increasing of system size, the...
Multi-robot system can improve the efficiency of mapping and exploration. One of the key problems is when and how to merge the partial maps acquired by robots independently to share environmental information between robots. This paper studies the problem of fusing two partial maps without common reference frames and relative position information of robots. On the basis of the similarity metric, the...
Compared to single robot, multiple robots system has advantages for unknown environment exploration. The key problem is to allocate target points to multiple robots appropriately so that the multiple robots simultaneously explore different areas of the environment to guarantee minimum overall exploration time. However, the computation burden for optimal allocation exponentially increases with the...
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