结果显示由于引线键合工艺、注塑工艺以及回流焊中封装体各部分不同的热膨胀系数引起的热应力和塑性变形是产生引脚跟断裂的主要因素。
The result shows that the plastic strain at the heel region induced by wire bonding process, molding process and the thermal stress and strain in solder reflow are the main causes of heel crack.
本文采用煤层断裂破坏指数、变形系数对煤裂隙发育程度进行综合评价，来预测高渗区。
An integrated evaluation of coal seam fracture development in terms of coal seam breaking index and deforming coefficient to predict high permeability area.
陶瓷材料具有良好的生物相容性、摩擦系数低，磨损小，耐磨力强，但陶瓷内衬断裂影响了陶瓷对陶瓷人工髋关节的长期效果。
Ceramics has good biocompatibility, low friction coefficient, and wear-resistance, but lined ceramics breakage affects long-term effect of ceramics to ceramics artificial hip joint.
实验发现通过等离子体处理后，纤维表面摩擦系数、断裂强度、断裂伸长率以及润湿性等性能都有了明显变化。
It was found that the friction coefficient, break strength, elongation at break and the surface hydrophilicity of PPS fiber had changed after the modification.
运用影像线性空间频率计算各震区活动断裂、线性影像与地震震级的相关系数在0。
By using the space frequency of linear image, the correlation coefficients of the frequency to earthquake magnitud are calculated, the values of which are 0.
试验表明，在相同纺丝条件下，涤纶三叶异丝的断裂强伸度和初始模量随丝条异形度的提高而降低，而断裂强伸度变异系数、沸水收缩率和条干不匀率却随之增大。
The test has shown that as the degree of profile increases, the initial modulus and the breaking strength and elongation of profile yarn decreases. We have also quined the findi...
试验表明，在相同纺丝条件下，涤纶三叶异丝的断裂强伸度和初始模量随丝条异形度的提高而降低，而断裂强伸度变异系数、沸水收缩率和条干不匀率却随之增大。
The test has shown that as the degree of profile increases, the initial modulus and the breaking strength and elongation of profile yarn decreases. We have also quined the findi...
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