It is difficult to date pyroclastic rocks,for almost all the dating methods,due to the multiple sources during their for......

Based on the effects of several casting parameters on slag entrapment in the mould (water modeling),the numerical modeli......

减肥是一种生活方式。当你拥有这种生活方式的时候,如何合理安排一天的饮食呢? Weight loss is a way of life. When you have th......

在冗余度串并联机构运动学分析基础上，将冗余度串并联机械的避障问题转化为等效串联机构的避障问题，环境划分为凸障碍环境及凹障碍两......