DXF数据提取，以及顺序优化，目前对样条曲线的信息提取还有一定的缺陷。-DXF data extraction, and the sequence optimization, the current right-spline curves of information, there will be some flaws.

数据挖掘的一个很重要的算法，用来是实现数据的提取。-Data Mining is a very important algorithm is used for data extraction.

The Principal component analysis, is a standard technique used for data reduction in statistical pattern recognition and signal processing A common problem in statistical pattern recognition is feature selection or feature extraction. Feature selec

wind数据库高频数据提取代码，包含多种类型高频数据的提取代码-wind-frequency data extraction Code Database