An alternative technique for crack detection in a Timoshenko beam based on the first anti-resonant frequency is presented in this paper.Unlike the natural frequ
By modeling metal as a special piezoelectric material with extremely small piezoelec- tricity and extremely large permittivity,we have obtained the analytical s
We study the effect of electrodes with varying thickness on thickness-twist vibration of a piezoelectric plate resonator of crystals of 6 mm symmetry.An exact t
LT24合金为6xxx系铝合金,用户对该规格管材的尺寸、性能和表面质量要求很高,尤其是对外径和壁厚公差有特殊要求。为了满足用户的这一需求,我们对LT24T4φ63×1.5规格管材进行
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
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在语文教学活动中,要达到教师高质量的教,学生高效益的学,方式方法诸多,手段途径无穷,其中实施学法指导就是一条切实可行的途径.要想让学生在语文乐园中学得有味,学得有成,不