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Opening English course in primary school in countryside is the necessity of social development in new century,is the fin......

The eccentric-gear can be used for variable speed transmission.But,due to the vibrations caused by variation of backlash......

Octa(aminophenyl)silsesquioxane (OAPS) was used as the curing agent of diglycidyl ether of bisphenol-A (DGEBA) epoxy res......

Insulin receptor has been purified to nearly homogeneous fromhuman placenta using DE-52 column and affinity chromatogra......

A new series of bone affinity compounds were synthesized by linking emodin with 5-fluorouracil derivatives. Their bone a......

As an important kind of intelligent materials, shape-memory materials have been received increasing attention on account......

要对网络信息资源进行更好的管理和查询,首先要建立一种合理的信息资源描述机制。metadata是描述网络信息资源的有力工具,但新的信......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......