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Abstract: A previously proposed approximate quasi-static theoretical method is employed herein to examine the deformation and perforation of a simply-supported circular plate struck by a flat-faced projectile at normal incidence.Based on the principle of
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文摘:采用准静态近似理论方法分析简支圆板在平头弹丸正撞下的变形和穿透.首先基于虚功原理得到了静态荷载位移关系,并将其用于预测低速冲击下圆板的能量吸收能力.当考虑了材料的应变率敏感性,并且不发生绝热剪切冲塞破坏的前提下,理论预测和实验结果吻合良好. |
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Abstract: A principle of linear CCD prism spectrometer system used to measure colors is presented.The spectrum sensitivity of the system is measured and its test and verify is finished in experiment.The reasons for error of the system is analyzed and impr
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文摘:介绍了用于颜色测量的线阵CCD棱镜光谱仪系统的工作原理，测出了系统的光谱灵敏度并作了实验验证，对系统的误差原因及改进措施进行了分析。 |
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Abstract: A probability calculation formula used for the cavity dimension of injection mold is derived on the basis of analysing the variation rule of plastic shrinkage rate, and a quantitative relation among the variation of plastic shrinkage rate, plast
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文摘:在分析塑料收缩率波动规律的基础上，导出了注塑模成型零件工作尺寸的概率计算公式，讨论了塑料收缩率波动范围、塑件尺寸公差、制造公差以及修模裕磨量之间的关系。 |
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Abstract: A problem resolution can be represented by a series of chromosomes in genetic algorithm(GA).In the evolving process of reproduction,crossoves and mutation to chromosomes,a chromosome which is fitter to the enviroment can be obtained as the resol
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文摘:遗传算法是将问题的求解用染色体的形式表示，在其复制、交叉、变异的进化过程中收敛为一个最适应环境的染色体，即为问题的解.用遗传算法对模糊控制中的隶属度函数进行编码，确定适应度函数，作遗传运算与微量调整，可实现对隶属度函数及控制规则的优化，改善模糊控制器的性能. |
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Abstract: A process scheme has been introduced for machiningra ther bigpress stand with high precision.
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文摘:文章介绍了一种加工高精度中大型压机机架的工艺方案。 |
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Abstract: A quantitative analysis for dynamic stability of a set of superconducting partial torus in a fusion reactor under a pulse current over a stationary current is given.
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文摘:对于聚变反应堆中超导载流磁体在稳态电流基础上受到脉冲电流影响时的动力稳定性给出了定量分析方法。 |
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Abstract: A relatively direct method is expounded in this paper to prove the termwise differentiation of power series, and a simple method is expressed to calculate the Fourier coefficient.
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文摘:用比较直接的方法证明幂级数的和函数在收敛域内可以逐项微分的公式；并得到了计算傅立叶系数的一种简便方法. |
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Abstract: A review for improvement and current situation about the dressing,metallurgy of platinum ores,a technical line and principal principle of treating the mineral intergrowth,technical index of floatation concentration,technical problems and trouble
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文摘:评述了原生铂矿选冶技术发展现状，处理该类共生资源的技术路线和基本原则及其浮选富集工艺指标，湿法冶金处理浮选精矿的技术问题和难点。 |
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Abstract: A review on the development of inductively coupled plasma atomic emission spectrometry including basis research, sampling techniques, application and instrumentation development is presented. 108 references are cited.
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文摘:综述了近年来电感耦合等离子体原子发射光谱在基础理论研究、进样技术以及广泛的分析应用领域方面的进展，并简介了对仪器装置的改进和研制。引用文献108篇。 |
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Abstract: A review with 10 references is given on the relationship between trace elements and the health of human body including the physological function of Fe,the immunity function of Se and the poisonous effect of Pb.
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文摘:讨论了微量元素与人体健康的关系及其在体内的代谢平衡问题，包括:铁的生理功能、硒的免疫功能、铅的毒害作用。 |
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Abstract: A review with 11 references on the medicinal and health protection actions of rare earth elements is given on the basis of a variety of home and abroad studies.
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文摘:根据国内外微量稀土元素在医药方面应用的研究，介绍了稀土元素的一系列特殊的药效及保健作用。稀士元素可广泛用于治疗烧伤、炎症、皮肤病、血栓病等。 |
