Feature selection is an important issue in the fields of machine learning and pattern recognition. The effectiveness of feature directly affects the design and performance of the classifier.
特征选择问题是机器学习和模式识别中的一个重要问题，特征的优劣直接影响分类器的设计和性能。
Based on the analysis of the technologies of the expandable pattern casting, borne problems of the design and selection of the EPC molding equipment-squeezing table have been investigated.
本文从EPC干砂造型工艺特点出发，分析了EPC造型设备——振实台设计和选用中应考虑的若干问题。
Through analysing production process, equipment capacity, working conditions, this article recommends the program control systematic design and the selection of PC pattern as well as its application.
通过分析生产工艺流程、设备容量、工艺操作条件等，介绍应用可编程序控制器控制原料制备工艺的系统设计和PC机型选择及应用。
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