Data-Dimensionality Reduction Using Information-Theoretic Stepwise Feature Selector
A novel information-theoretic stepwise feature selector (ITSFS) is designed to reduce the dimension of diesel engine data. This data consist of 43 sensor measurements acquired from diesel engines that are either in a healthy state or in one of seven different fault states. Using ITSFS, the minimum number of sensors from a pool of 43 sensors is selected so that eight states of the engine can be classified with reasonable accuracy. Various classifiers are trained and tested for fault classification accuracy using the field data before and after dimension reduction by ITSFS. The process of dimension reduction and classification is repeated using other existing dimension reduction techniques such as simulated annealing and regression subset selection. The classification accuracies from these techniques are compared with those obtained by data reduced by the proposed feature selector.
In IDSS,indexes for decision need usually be quantilized for further analysis and process.Bothconverse qualitative mapping(CQM)and property coordinate study and analysis are new methods in theory of property.The former is to quantilize indexes,and the latter is to study sample,then to get global satisfying degree of indexes according to evaluators' preference.Take enterprise's culture for example,205 enterprises' culture was evaluated on the basis of three indexes with reasonable result.A new method is proposed for inteligent decision.