The study took a sample survey and focus group interviews combination of empirical research.
本课题采取抽样调查和焦点小组访谈相结合的方法进行实证研究。
The application of sample survey method in history research is analyzed.
方法：对项目点北碚区进行抽样调查。
The Research of Sample Extraction and Image Sample Database for High Resolution Remote Sensing Image;
研究了提高光学仪器与雷达系统的分辨本领的理论与方法。
Research on standard sample generation system for email filtering;
电子邮件过滤是网络信息安全研究的热点。
Research on standard sample generation system for email filtering;
电子邮件过滤是网络信息安全研究的热点。
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