最小二乘問(wèn)題的算法與應(yīng)用研究
[Abstract]:As an important branch of optimization theory and algorithm, the least squares problem is widely used in the fields of physics, statistics and economics. Moreover, many practical problems in life are the least squares problem, so it is very meaningful to study the algorithm and application of the least squares problem. With the more and more extensive application of the least squares problem, the research of its algorithm is particularly important. In recent years, there have been many new algorithms based on least squares. In the first part of this paper, the algorithm of least square problem is studied. The algorithms of linear least squares problem and nonlinear least squares problem are studied. According to the constraint conditions and the structural characteristics of the objective function, the algorithm is classified and analyzed. To prepare the theoretical basis for the new algorithm, also make the next research direction more clear. The second half of this paper is the application research of least square problem. Aiming at the typical nonlinear least square model of grounding grid corrosion diagnosis, a particle swarm optimization algorithm based on least square algorithm is designed. In this paper, based on the basic model, the ground grid model of deleting redundancy is established, and the corresponding algorithm of deleting redundancy is given, which greatly improves the efficiency of calculation. Then the simplified model is diagnosed by using the algorithm given in this paper. Finally, the simulation results show that the proposed algorithm can simplify the model and diagnose the algorithm, which shows the feasibility of the algorithm.
【學(xué)位授予單位】:華北電力大學(xué)(北京)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:O241.5
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