Because of harmful working conditions such as stick-slip vibration,traditional PDC bits were not adapted to hard formati......

目的：检测中药四藤方对人胃癌细胞株BGC823细胞上皮钙黏附蛋白(E-cadherin)蛋白表达,并观察中药对胃癌细胞侵袭力的影响。方法实验......

Switchgrass is an introduced C4grass in the semi-arid Loess Plateau of China,but there is a lack of information to asses......

为使海水淡化水具备较好的化学稳定性,能市政管网中安全输送,并符合饮用水卫生标准作为生活用水使用,对CO2溶解石灰石法矿化海水淡......

目的 了解网络成瘾住院患者冲动、攻击性人格特点以及经过综合性网瘾戒治后转归情况.方法 采用Barratt冲动性量表(BIS)、Buss行为......

Structural failure of buried cast/ductile iron water mains and tanks due to corrosion attacks manifests in leaks and is ......