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Data Mining Techniques Based on Grey System
Data Mining Techniques Based on Grey System

... One of the main tasks facing the theories of Grey system is to seek the mathematic relations and movement rule among factors themselves and between factors, based on behavioral data of social, economic, et al [J.L.Deng,1985][S.F.Liu,1998]. In Grey system theories, it is through the organization of r ...
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... Traditional algorithms such as decision trees, neural networks, and support vector machines are covered in my AI course, so they get only peripheral mention here. Of course, one could cover these topics in more detail if one wished. Instead, I focus on the k-Nearest Neighbor algorithm from a data mi ...
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A single pass algorithm for clustering evolving data streams

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... and relationships which represent appropriate utilization of services. To date, most data analysis has focused on the area of detection and prevention of fraud and inappropriate practice. Inappropriate practice deals with issues such as requesting or providing services which are unreasonable, unnec ...
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Nonlinear dimensionality reduction



High-dimensional data, meaning data that requires more than two or three dimensions to represent, can be difficult to interpret. One approach to simplification is to assume that the data of interest lie on an embedded non-linear manifold within the higher-dimensional space. If the manifold is of low enough dimension, the data can be visualised in the low-dimensional space.Below is a summary of some of the important algorithms from the history of manifold learning and nonlinear dimensionality reduction (NLDR). Many of these non-linear dimensionality reduction methods are related to the linear methods listed below. Non-linear methods can be broadly classified into two groups: those that provide a mapping (either from the high-dimensional space to the low-dimensional embedding or vice versa), and those that just give a visualisation. In the context of machine learning, mapping methods may be viewed as a preliminary feature extraction step, after which pattern recognition algorithms are applied. Typically those that just give a visualisation are based on proximity data – that is, distance measurements.
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