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The PSE in the curve coordinate systems are solved by the numerical techniques developed efficiently in this paper. A normal transform is introduced, and there are enough much grids in the region between the critical layer and the wall, where the variation of the disturbance is the quickest. The finite-difference of governing equations with fourth-order accuracy in the normal direction is utilized in full regions including points close the wall, and is very important for accurately discreting equations.
对于曲线坐标系下的抛物化稳定性方程,文中发展了求解的高效数值方法:引进法向变换,使得在临界层与壁面之间的扰动量变化最快的区域有更多的法向网格点;导出包含边界邻域在内的完全四阶精度的法向有限差分格式,这对方程精确离散至关重要;采用全局法和局部法相结合的方法及其新的迭代公式,大大加速收敛并得到更精确的特征值。
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In a deconfined QGP, the pair can be copiously produced through gluon fusion.
对于禁闭解除的 QGP 相,奇异夸克对可以通过胶子的融合而大量产生。
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At present, academic circles have do some research on the theories of establishing corporation and related promotor system. But the systematic and further study of the validity and responsibility of the legal act of establishing corporation are few.
目前,学术界对于设立中公司理论以及相关联的发起人制度理论,已经断续的有过研究,但系统并深入地对公司筹建中合同行为之效力和责任归属的研究结果,可谓寥寥无几。
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Modern rationalism, by contrast, sees this event as the outcome of a mistaken but corrigible understanding of the relation between philosophy and politics, and it argues that civil society can be improved by, and rendered hospitable to, the public exercise of philosophic reason.
与此相对照,现代理性主义则把两者的张力看作对于哲学与政治关系的错误认识的结果,并且认为这种错误认识可以被改变,现代理性主义认为,公民社会可以通过民众的哲学理智实践而改善,而且可以使公民社会乐于接受这样的实践。
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Although , as Justice Frankfurter has stated , the various American states present a crazy quilt pattern defeating any generalization, the normal method by which American justice seeks to determine the appropriate penalty in murder cases is a combination of degrees of murder and the device of entrusting a discretion as to the penalty of the court , except for certain cases where the death penalty is mandatory for first-degree murder.
尽管正如弗兰克福特法官所陈述的一样,美国各州提出了一个废弃任何一般化的怪诞的被状模式,除了死刑对于一级谋杀是强制性的特定情况外,美国所法官寻求的决定谋杀案件中的适当的刑罚的正常方法是,谋杀罪的等级和把关于刑罚的自由裁量权交付法院的办法相结合。
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But the content of has significant effect on the mechanism of phase seperatin and the types of crystalline.
而试样中的含量对于该玻璃的分相机制及析晶种类有很大的影响。
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Our results reveal that with the same number of cobalt atoms and the same cobalt-substrate interation stength, the melting points and pre-melting intervals of the two kinds of supported Co clusters are all in reasonable agreement with each other. With increasing the depth of supported potential, the melting points increase for the supported cluster. Similar to the case of free clusters, the linear relation between the melting point and the inverse of cluster's size cube root is also found for the two kinds of supported clusters.
结果表明:对于给定原子数目的支撑Co团簇,在衬底势强度相同时,两种衬底势下对支撑团簇熔点及预熔化区间给出了一致的描述;随衬底势强度增加,支撑团簇熔点升高,且两种衬底势所描述的支撑Co团簇也类同于自由Co团簇都表现出较好的熔点与尺寸依赖的线性关系。
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So the task of artificial contrast which was finished in scores of workdays or even hundreds of workdays before can be finished in several minutes by using this system now. The combination of dactylography with legal medicine not only can identify blood group and test ABO blood group of the left fingerprints...
指纹学与法医学技术相结合,不但可以进行血型鉴定、测定遗留指纹ABO血型,而且可以通过与法医DNA技术的结合,对于那些较为模糊或指纹特征点较少或不完整的指纹进行个人识别。
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Moreover, to the surface measured not parallel with the video gauge, the depth focus method was described which was based on Focused Image Surface and Shape-Form-Focus .
另外,对于与视觉坐标测量机的测头测量平面不平行的表面,本文设计了调焦形貌法和正焦图像表面相结合的深度聚焦方法。
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In the single crystal of C60 with a FCC structure,positron mainly appears outside the C60 molecule.The main annihilation space is the interspace between molecules.The calculated positron bulk lifetime in C60 is 352ps, which agrees with experiment value of 356ps in literature.In carbon nanotube bundles with different dimeters,as the diameter of carbon nanotubes increases,the main space where positron appears changes from the interspace of carbon tubes to the space inside carbon tubes,the radio between positron annihilation with valence eletrons and core eletrons becomes larger,the positron bulk lifetime in carbon nanotube increase rapidly first and come to be a constant at the end.The calculated positron lifetime of carbon nanotube with a dimeter of 0.8~1.6ns is 332~470ps,which agrees with the experiment value of 394ps.Positron annihilation has been studied in widly used compound semiconductors.
计算结果表明:在片层结构的石墨晶体中,正电子主要在石墨层间的空隙中湮没,计算出的石墨中的正电子寿命为208 pS,与文献中的实验结果215 ps符合很好;在金刚石单晶中,正电子主要在碳原子之间的空隙中存在并发生湮没,计算出的金刚石中的正电子寿命为115 ps,文献中的实验结果110 ps左右符合;在面心立方结构的C60晶体中,正电子主要在C60分子球壳内外侧及分子之间存在,C60球形分子中心正电子分布很少,正电子的湮没区域集中在C60分子之间的空隙区域,计算出的C60中的正电子寿命为352 ps与文献中的实验结果356ps相符合;对于不同管径碳米管束中的正电子分布,随着碳纳米管直径的增加,碳纳米管束中的正电子由主要在碳纳米管管间的区域出现转变为主要在碳纳米管管内中心的区域出现:碳纳米管束中的正电子与碳原子的价电子的湮没概率变得越来越大,与核心电子的湮没概率变得越来越小;碳纳米管束中正电子的湮没寿命先迅速增大,而后趋于一定值。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力