查询词典 archimedically ordered number field

In terms of the topological invariant in Riemann-Cartan spacetime proposed by Prof. Duan and the φ-mapping topological current theory, we gave the cosmic strings with the complex scalar field and showed that the strings appear in the zeroes of the scalar field. Meanwhile one can find that the length of cosmic strings is quantized in the topological level and the quantum number is determined by Hopf indices and Brouwer degrees.

以段一士教授提出的Riemann-Cartan流形中的新拓扑不变量为基础研究了宇宙弦的拓扑结构，指出宇宙弦只能存在于复标量场的零点处，而且在拓扑层面上是量子化的，而该量子数决定于Hopf指数和Brouwer度。

After this, the values of m-th Gauss sums have been determined for small m(= 3,4,···, 12) by using arithmetic properties of cyclotomic fields Q- Recently the formulas of Gauss sums are determined in "self-conjugate" and "index 2" cases in which the Gauss sums belongs to the rational number field and certain imaginary quadratic field respectively.

继高斯之后，人们用代数数论对于m较小情形计算出m次高斯和。近年来，人们对于&自共轭&情形和&指数2&情形算出高斯和。对于这两种情形，高斯和的值分别属于有理数域和虚二次域。

The results showed that compared with the unburned field, species number of woody heliophilous plant seedlings increased in the burned field, mainly including seedling sprouts of Cunninghamia lanceolata, Eucalyptus robusta, Quercus fabric and Camellia oleifera.

结果表明：与未火烧林地相比，火烧迹地内阳生木本植物幼苗物种种数增加，更新苗主要以杉木、桉树(Eucalyp-tus robusta)、白栎、油茶等萌生枝为主。

Since 1957 Lee's "weak interaction in the parity nonconservation" concept was experimental and that shared the Nobel Prize in Physics; its 1954 proposed standard field theory, in the 1970s developed into integration and understanding elementary particle strong and weak, and electromagnetic interactions of the three foundation are also in the statistical physics, condensed matter physics, quantum field theory, mathematical physics in a number of outstanding major contribution.

著名美籍华裔科学家、物理学大师、诺贝尔物理学奖获得者。1957年由于与李政道提出的&弱相互作用中宇称不守恒&观念被实验证明而共同获得诺贝尔物理学奖；其于1954年提出的规范场理论，则于70年代发展成为统合与了解基本粒子强、弱、电磁等三种相互作用力的基础；此外并曾在统计物理、凝聚态物理、量子场论、数学物理等领域作出多项卓越的重大贡献。

The thesis makes a wellbore pressure and temperature distribution allegiance calculation forecasting model which takes the seawater temperature field and coefficient of heat transmission into account based on the study of the related theories. And the thesis makes a research of the impact of Reynolds Number upon drag coefficient based on the classical Tunner Droplet Model, and makes the critical flow rate model of liquid lift for Ya 13-1 gas field from the perspective of security.

通过理论研究，建立了考虑海水温度场及传热系数的适用于崖13-1气田的井筒压力、温度分布耦合计算预测模型；从气井积液机理研究出发，建立了高低气液比携液临界流量的计算模型，在高气液比携液临界模型的推导中，以经典的Tunner液滴模型为基础，研究了雷诺数对曳力系数的影响，从安全考虑建立了适用于崖13-1气田的携液临界模型。

In the ease of large Reynolds number, Reynolds stress turbulence model and computational fluid dynamics was used to simulate the cone valve flow field and investigate emphatically the effect of structural parameters, inlet pressure, outlet pressure, and valve opening on the flow field within cone valve.

在大雷诺数下应用雷诺应力湍流模型和计算流体力学方法对锥阀的内部流场进行数值仿真计算，着重研究阀的结构参数、入口压力、出口压力、阀口开度等对锥阀流场的影响。

Type your desired number into the field (if field is gray then this option is not available).

输入你想要的数字到该文本域中。如果该文本域是灰色的表示这个选项不可用。

This paper Research on the front of the field of offensive tactics of place kick by collecting football field before the ball offensive tactical positioning relevant research data and analyzing 2004 Euro-football Cup and 2006 World Football Cup, and in accordance with the contemporary world football offensive use of tactical place kick to the characteristics of the strong teams in the football match using tactical offensive positioning of the ball, summed up place kick offensive tactical use characteristics, conditions and application use requirements of place kick offensive tactical training patterns were studied through the use of sports psychology knowledge of place kick offensive tactical awareness training conducted research, and proposed a number of training football players place kick offensive tactical awareness psychological method, this method other tactical awareness has also a reference.

本文对足球比赛前场定位球进攻战术模式训练进行了较系统的研究，通过收集足球比赛前场定位球进攻战术相关研究资料，统计收集2004年欧洲杯足球赛和2006年世界杯足球赛的有关资料，并根据当今世界足坛运用定位球进攻战术的特点，分析世界强队在足球比赛中运用定位球进攻战术的情况，总结了定位球进攻战术的运用特点、运用条件和运用要求，对定位球进攻战术模式训练进行了研究；通过运用运动心理学方面的知识对定位球进攻战术意识的培养进行了研究，并提出了一些培养足球运动员定位球进攻战术意识的心理学方法，这种方法对其它战术意识的培养也具有借鉴作用。

In the paper, based on reading and studying a great number of references about fluid dynamic technique and numerical computing methods of flow field, 3-D Numerical simulations and visual analysis of the flow field in hydraulic poppet valve with inside flow work condition were obtained by CFD software Fluent.

本文在参阅大量国内外有关计算流体力学和流场数值计算方法相关资料的基础上，用CFD软件Fluent对内流工况液压锥阀内部流场进行了三维数值模拟及可视化分析。

The NMETHODS field contains the number of method identifier octets that appear in the METHODS field.

NMETHODS 区域包含了出现在METHODS区域中的方法标识符字节的数量。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。