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Understanding the indoor environment through mining sensory data
Understanding the indoor environment through mining sensory data

... 2.2. Data mining operations A data mining project was initially carried out in different ways with each data analyst based on his/her own experience and way of approaching the problem often through trial-and- error. Later, people introduced standardised data mining processes, among which two proces ...
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Towards On-Line Analytical Mining in Large Databases

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... issue when secure information is sent over a network .Data encryption is done and method used is text to image encryption .To investigate dividing the text into blocks and then transfer each block into an image and create an individual key for each block. Chauhan et al.[3] provides an overview of th ...
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... impossible to manually analyze them for valuable decisionmaking. So that, humans need assistance in their analysis capacity, humans need data mining and its applications [2]. Such requirement has generated an urgent need for automated tools that can assist us in transforming those vast amounts of da ...
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Chapter 20: Exploratory Genomic Data Analysis

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... emerging techniques of intelligence research under the big data environment, like data mining, visualization, semantic processing, etc. Meanwhile it also summarizes some new tools, such as Weka, Sitespace, etc. In order to promote the development of intelligence theory research and practice, it is v ...
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The Discrete Basis Problem

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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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