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Abstract: A numerical simulation on a flat plate,which has free coming flow at infinite distances-has been pro-cessed with pseudo-spectral methods.Boundary layer equations are dispersed with pseudo-spectral matrix di-rectly and computed.The results are co
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文摘:本文对平板在自由来流情况下的层流边界层用伪谱方法进行了数值模拟,直接用伪谱矩阵方法对边界层方程进行离散并编程计算,与经典结果相比较,发现本文结果较好,下一步研究工作有了可靠的基础。 |
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Abstract: A open enterprise management information system has four characters：generality,adaptability,compatibility and friendly interface.Based on AIBAS system,it describes that the prerequisites of open system are：open system model,structure,advanced de
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文摘:以AIBAS系统为例，论述了开放式系统应该具备的前提条件为：开放式系统模型，开放式系统结构，先进的系统开发工具，面向多企业功能的参考模型，面向对象的关系型数据库系统，业务应用程序接口，用户友好的操作界面。 |
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Abstract: A paint vapour treatment by means of blowing and drawing ventilation in an airtight workroom is suggested in the article.
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文摘:提出在密闭喷漆作业间，采用吹吸式通风法对作业间的漆雾进行治理的方案。 |
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Abstract: A piezoelectric resonance-conveying machine is developed by using homemade piezoelectric ceramic chips,and the structural parameters of its main parts is optimized and researched.A intelligent and multifunctional power supply to drive resonance-
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文摘:用国产压电陶晶片研制出压电式振动给料器，并对其主要部件结构参数进行了优化研究，还研制出驱动压电式振动给料器的智能化多功能电源，该压电式振动给料器由于具有多项优良品质可望成为振动给料器的换代产品。 |
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Abstract: A practical staining method for counting polyhedra (PIBs) in nucleopolyhedrovirus insecticide was developed.
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文摘:本文介绍了一种直接检测病毒杀虫剂产品中多角体数量的染色计数方法。 |
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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。 |
