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摘要: 提出一种局部化的线性流形自组织映射方法, 可自主学习高维向量空间中的一组有序的低维线性流形. 与现有的基于Kohonen的自适应子空间自组织映射网络(Adaptive-subspace self-organizing map, ASSOM)方法相比较, 本文方法有效地克服了流形表达中出现的数据混淆现象, 网络中各神经元渐近学习各自区域内样本数据的平均向量和主元子空间, 数据表达更加清晰可辨. 实验中, 新方法对数据簇的分类准确率明显优于参与对比的其他三种方法, 其对手写体数字识别的准确率在MNIST训练集和测试集上分别达到了98.26\%和97.46\%.Abstract: This paper presents a method of localized linear manifold self-organizing map, which is able to learn a set of ordered low-dimensional linear manifolds in the high-dimensional vector space. Compared to state-of-the-art methods based on Kohonen's adaptive-subspace self-organizing map (ASSOM), our method avoids confusion of data in the manifold representation. Each neuron in the network approximately learns the mean vector and principal subspace of the data in its local region. The data representation is therefore more discernable. Experiments show that the proposed method performs much better than other three methods in separating clusters. In terms of handwritten digit recognition, the proposed method achieves an accuracy of 98.26\% on the training set of the MNIST database and 97.46\% on the test set.
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