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......

Objective To analyze and estimate the environmental efficiency of Chinas vegetable production. Methods The stochastic tr......

目的 比较常规超声和超声弹性成像( ultrasonic elastography,UE)对肝良恶性肿瘤的诊断价值.方法 对145例患者共159个肝病灶进行......

The magnetoelectric(ME) effect of the particulate magnetostrictive/piezoelectric composite was theoretically studied. Th......

The mechanical behavior of plastic concrete used in the cut-off walls of earth dams has been studied.Triaxial compressio......

基于三轴压缩循环加卸载试验结果,对黄砂岩峰值强度、变形特征、弹性模量、能量转化和阻尼比变化规律开展了试验研究。结果表明:随......