技术经济分析法

利用技术&经济分析法确定润滑作业周期；

The lubricating exercise period is confirmed by using the technology-economy analytical method ;

反冲洗工况的优化条件是指在满足滤池再生的基础上尽量缩短反冲洗时间，通过对目前我国常用反冲洗控制模式进行技术经济分析，发现定时法是适合滤池反冲洗的控制模式。

It is an optimization condition for backwashing to reduce the time of backwashing after filters are cleaned . By means of technique and economy analysis , it is found that timing method is suitable for backwashing control .

介绍了国内外γ-丁内酯及四氢呋喃生产技术进展和市场需求，并对各种生产工艺进行了技术经济分析，认为顺酐法具有明显优点。

Technical progress in the production of and the demand for γ - butyrolactone and tetrahydrofuran in China are described and technical-economic analysis on various production processes are made . Maleic anhydride process is considered most favoured .