arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.03922cs.LGcs.HCstat.ML
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面向数据可视化的非线性模糊性约简:一种基于无监督模糊规则的方法

Nonlinear Dimensionality Reduction for Data Visualization: An Unsupervised Fuzzy Rule-based Approach

Indian Statistical Institute(印度统计研究所)

Suchismita Das, Nikhil R. Pal

摘要:

在这里,我们提出了一个无监督的模糊规则为基础的降维方法主要用于数据可视化。它考虑了以下重要问题相关的降维为基础的数据可视化:(i)保存的邻域关系,(ii)处理数据的非线性流形,(iii)预测新的测试数据点的能力,(iv)系统的可解释性,以及(v)拒绝测试点的能力,如果需要的话。为此,我们使用一阶Takagi-Sugeno型模型。我们使用输入数据中的聚类生成规则前因。在这方面,我们还提出了一个新的变种的测地线c-均值聚类算法。我们通过最小化误差函数来估计规则参数,该误差函数将点间测地线距离(流形上的距离)保持为投影空间上的欧氏距离。我们将所提出的方法应用于三个合成和三个真实世界的数据集,并与其他四个标准的数据可视化方法的结果进行了直观的比较。实验结果表明,该方法具有较好的性能,优于或可与其它方法相媲美。所提出的方法被认为是强大的初始条件。通过实验验证了该方法对测试点的预测性。我们还评估了我们的方法在应该拒绝输出点时拒绝输出点的能力。然后,我们扩展了这个概念,为学习具有不同目标函数的数据投影的无监督模糊模型提供了一个通用框架。据我们所知,这是第一次尝试使用无监督模糊建模进行流形学习。

英文摘要:

Here, we propose an unsupervised fuzzy rule-based dimensionality reduction method primarily for data visualization. It considers the following important issues relevant to dimensionality reduction-based data visualization: (i) preservation of neighborhood relationships, (ii) handling data on a non-linear manifold, (iii) the capability of predicting projections for new test data points, (iv) interpretability of the system, and (v) the ability to reject test points if required. For this, we use a first-order Takagi-Sugeno type model. We generate rule antecedents using clusters in the input data. In this context, we also propose a new variant of the Geodesic c-means clustering algorithm. We estimate the rule parameters by minimizing an error function that preserves the inter-point geodesic distances (distances over the manifold) as Euclidean distances on the projected space. We apply the proposed method on three synthetic and three real-world data sets and visually compare the results with four other standard data visualization methods. The obtained results show that the proposed method behaves desirably and performs better than or comparable to the methods compared with. The proposed method is found to be robust to the initial conditions. The predictability of the proposed method for test points is validated by experiments. We also assess the ability of our method to reject output points when it should. Then, we extend this concept to provide a general framework for learning an unsupervised fuzzy model for data projection with different objective functions. To the best of our knowledge, this is the first attempt to manifold learning using unsupervised fuzzy modeling.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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