基于花朵授粉算法的軟子空間聚類算法優(yōu)化研究
[Abstract]:With the development of information technology, data collection and storage technology, the scale of data is gradually expanding and the dimension is gradually increasing. The traditional clustering algorithm is unable to cluster effectively because of the sparsity of high-dimensional data and the disaster of dimensionality. In order to solve the problem of high dimensional data clustering, soft subspace clustering analysis technology emerged as the times require and received wide attention. Soft subspace clustering by describing the uncertainty of samples belonging to different clusters has better adaptability and flexibility and is closer to the objective world. However, the existing soft subspace clustering algorithms mainly have the following two shortcomings: the clustering center is initialized by randomly selecting sample points, which results in the clustering accuracy and stability of the algorithm depend on the initial cluster center, and the local search strategy is adopted. As a result, the algorithm is prone to fall into local optimum in the process of clustering. The main contents of this paper are as follows: (1) aiming at the problem that the clustering results depend on the initial cluster center, this paper optimizes the fast search algorithm (CFSFDP), and introduces the projection partition and class merging techniques. An optimization algorithm based on projection partitioning and class merging (PM-CFSFDP) is proposed to obtain more accurate center points of classes. PM-CFSFDP is applied to soft subspace clustering as an initialization step to select the best clustering center to reduce the dependence of the algorithm on the initial cluster center. (2) aiming at the problem that the clustering process is prone to fall into local optimum. In this paper, the flower pollination algorithm (FPA) is optimized by introducing the mixed leapfrog idea and adaptive Gao Si mutation strategy. A hybrid leapfrog flower pollination algorithm (AGM-SFLFPA) based on adaptive Gao Si mutation is proposed, which can effectively avoid falling into local optimum and converge quickly. AGM-SFLFPA is applied to soft subspace clustering as a global optimal search strategy to search the optimal weights. (3) two improved algorithms, PM-CFSFDP and AGM-SFLFPA, are introduced into soft subspace. A soft subspace clustering algorithm (FPASC). Based on flower pollination algorithm is proposed. The experimental results on the UCI standard data set show that the algorithm can reduce the dependence on the initial cluster center, avoid falling into local optimum in the search process, and effectively improve the clustering accuracy and stability of the soft subspace algorithm.
【學(xué)位授予單位】:中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TP18;TP311.13
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