查询词典 potential theory

A mathemetical model of magnetic field in electromagnetic separation of inclusions from molten aluminum under rectangle coil and 50Hz current is presented according to the magnetic vector potential integral equation and the basic theory of magnetohydrodynamics. The magnetic field distribution in the gap of coils is simulated by the model and the actual magnetic field distribution also is measured. The experimental results show that the magnetic field distribution in the gap of coils is uniform and is consistemt with the model simulation. The magnetic field designed accord the simulated result is proved suitable in the practice.

摘 要：根据电磁流体力学的基本理论，利用矢量磁位积分，建立了在采用矩形电磁线圈和工频电源的条件下电磁分离铝熔体中夹杂的电磁场数学模型，模拟计算了电磁感应线圈气隙中的磁场分布状态，同时对制做的感应线圈的实际磁场进行了测量模拟计算磁场的分布状态与实际磁场的测量结果基本一致，都表明在电磁感应线圈气隙中磁场分布均匀，可以进行分离铝熔体中的非金属夹杂。

Through the analysis based dislocation theory and MD simulations,the connection between atom properties and macroscopic strain rate sensitivity of metals has been established by using Orowan\'s relationship as the bridge. The influences of interatomic potential and atomic mass on the stress dependence of dislocation velocity of FCC metals and strain rate sensitivity have been examined through MD simulations of a moderate scale.

依据位错运动的Orowan关系和研究位错速度对应力依赖关系的分子动力学方法，提出了研究金属原子性质与其应变率敏感性关系的分析方法；然后开展分子动力学模拟来研究位错速度对应力的依赖关系，依据数值模拟结果分析原子性质对金属应变率敏感性的影响。

Based on the quantum chemistry ab initio calculation method, density functional theory method's ultrasoft pseudopotential method and semi-empirical interatomic pair potential combined, the cohesive energy of martensite crystal cell of the high-carbon alloy steel DM8A and DM8 was calculated.

利用量子化学从头计算方法、密度泛函理论的超软赝势方法与半经验原子间相互作用对势相结合，计算出高碳合金钢DM8A钢和DM8钢马氏体晶胞的结合能信息。

The quantum chemistry ab initio calculation method and semi-empirical interatomic pair potential were combined, and the crystal cell models of the alloyed Austenite in "the empirical electronic theory for solid states and molecules" were consulted. The cohesive energy information of Fe-C-Me Austenite crystal cell was calculated.

利用量子化学从头计算方法和半经验原子间相互作用对势，并参考"固体与分子经验电子理论"中的合金奥氏体的晶胞模型，计算出Fe-C-Me奥氏体晶胞的结合能信息。

According to the theory of the plane potential flow,main parameters are calculated for the concrete jet pump .

基于平面势流理论对混凝土射流泵装置的主要参数进行了理论设计，提出了一种新的设计方法。

A 3 kilojoule electrical impulse has the potential to lift several hundred kilograms, so in theory a track with several coils that were pulsed in a equence could lift and carry along a load, such as a train: MagLev technology without superconductors!

例如这样的火车：不用超导体的磁悬浮。

The basis of arguing the Chinese fast-food implication and development period, the development situation of modern Chinese fast-food, the meaning of study, current situation and laciness. The article examines the present situation through data from market research and field research, exploring the existing problems of the modern Chinese fast-food industry and analyzing what factors influence its growth. Finally it offers potential development methods, specifically selecting proper location, adopting franchising mode, establishing correct customer service and managerial methods, adopting the area strategy and the brand strategy. It is the writer hope that the article provides a meaningful idea that will aid in the improvement of both Chinese fast-food development theory and the modern Chinese fast-food industry.

论文在综述现代快餐业的含义及发展历程，现代中式快餐发展状况，现代中式快餐研究意义、现状及不足的基础上，采用对比法、列举事例法、数据法、市场抽样调查法、实地考查法等方法研究了长沙市现代中式快餐发展现状及存在问题，分析了影响长沙市现代中式快餐发展的主要因素，最后提山发展长沙市现代中式快餐的对策，即进行合理选址、采用特许经营模式、完善服务与管理、实施地域化战略、打造品牌等，以促进与西式快餐同台竞争的现代中式快餐的迅速发展。

The task of translation is as follows: First, an understanding of the cultural and experimental worlds that lie behind the original act of speaking or of writing, ways into their schemata. Second, an understanding of the potential of the two semiotic systems in terms of their image-making. Third, a making intelligible of the linguistic choices expressed in the message. Fourthly, an opportunity to explore the social psychological intentions of the originator of the message matched against one's own. Lastly, a challenge to match all of these with our appropriate response in our semiotic and linguistic system, and our culture. Traditional translation theory also presented means of differentiating and categorizing translation types, including metaphrase, imitation and paraphrase.

翻译的任务是：首先，要理解隐藏在原文中的现实世界及其文化内涵；其次，要理解两种不同语言中的不同符号学体系下的潜在意象；第三，要从语篇的信息中了解其所反映的语言学方面的选择；第四，要探究原文作者与译者自身在社会心理方面的不同倾向；第五，翻译也是一种挑战，译者要在自身符号学与语言学体系中以及文化环境中将以上各方面要求协调起来。

The task of translation is as follows: First, an understanding of the cultural and experimental worlds that lie behind the original act of speaking or of writing, ways into their schemata. Second, an understanding of the potential of the two semiotic systems in terms of their image-making. Third, a making intelligible of the linguistic choices expressed in the message. Fourthly, an opportunity to explore the social psychological intentions of the originator of the message matched against ones own. Lastly, a challenge to match all of these with our appropriate response in our semiotic and linguistic system, and our culture. Traditional translation theory also presented means of differentiating and categorizing translation types, including metaphrase, imitation and paraphrase.

翻译的任务是：首先，要理解隐藏在原文中的现实世界及其文化内涵；其次，要理解两种不同语言中的不同符号学体系下的潜在意象；第三，要从语篇的信息中了解其所反映的语言学方面的选择；第四，要探究原文作者与译者自身在社会心理方面的不同倾向；第五，翻译也是一种挑战，译者要在自身符号学与语言学体系中以及文化环境中将以上各方面要求协调起来。

The potential energy surfaces of ground state of He—HBr complex have been calculated at several levels of theory, including the single and double excitation coupled-cluster method with noniterative perturbation treatment of triple excitation CCSD.

在用非迭代的三重激发项来校正CCSD的CCSD理论水平下，采用aug-cc- pVQZ基函数对He—HBr的分子间势进行了系统的研究。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。