最小二乘问题的算法与应用研究
[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.
【学位授予单位】:华北电力大学(北京)
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:O241.5
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