查询词典 exterior approximation

In the thesis, I introduce a new method to calculate the amplitude for gluon radiation on the base of helicity amplitude approximation.

在本文的研究中，我们还介绍了螺旋振幅近似的计算方法，并在此基础上发展了一种计算胶子辐射振幅的新方法。

In chapter 3,the density-functional theory for the half-filled Hubbard model and extended Hubbard model in one and two dimensions has been studied withinthe SIC-LSD approximation.

第三章将总能的SIC用Wannier函数作为局域单粒子态表示，研究了一维和二维半满的Hubbard模型和扩展的Hubbard模型的密度泛函理论。

We assume the core of neutron stars is a β-stable strange matter consisting of nucleons and hyperons, then the influences of the hyperon-hyperon interaction on the properties of neutron stars are studied in the relativistic mean-field approximation.

我们假定中子星内部物质是由核子与超子混合组成的β稳定的奇异强子物质，在相对论平均场框架内研究了超子超子相互作用对中子星性质的影响。

This thesis focuses on maximum-power-point-tracking algorithm applying for wind-turbine generator system. The system includes the serve-motor, induction generator, three-phase full bridge rectifier, buck converter and fixed load. This thesis uses traditional Current Perturbation Algorithm as well as Perturbation Stochastic Approximation Algorithm to implemented with Matlab/simlink and hardware to achieve the maximum power tracking.

本文针对风力发电系统提出最大功率追踪法则，整体系统架构包含了伺服马达、感应发电机、三相全桥式整流器、降压直流转换器和固定负载，并由传统电流型扰动观察法合并扰动近似演算法，进行Matlab/simlink 模拟与电路实作设计来完成最大功率追踪。

In this paper, the sparse approximation inverses and eigenvalue translation based preconditioners for Krylov subspace methods are thoroughly researched by situation of research at home and abroad, their internal mechanism are studied also.

本文在国内外关于Krylov子空间方法的稀疏近似逆和基于特征值转换的预处理方法研究状况的基础上，对它们进行了进一步研究，探讨了它们的内部机理。

Traditionally, research on the phenomenological theory for neutral kaon system use the effective Htmiltonian theory based on the Wigner-Wesskopf approximation.

1引言 中性K介子系统一直以来是由一个准到弱作用二阶的2X2非厄密有效哈密顿量描述的。

And while it is not the exact equivalent of "legroom", it does give a very good approximation of how much seat room you should expect.

虽然不完全等同于可伸腿的空间，它仍然是衡量你的座位空间大小的一个很好的指标。

In this paper, mathematical model of optimal operation of natural gas gathering and distributing pipeline network system was formed according to analyzing influencing factors on this system, and linear approximation method and complex method were adopted to resolve it.

通过分析影响天然气输配气管网系统运行的各种因素，建立了天然气输配气管网系统运行优化数学模型，并分别采用线性逼近法和复合形法进行模型求解。

A novel least squares algorithm based on anti-WKB method and linear segment interpolation,which is called prediction-verification method, is proposed.This method takes the values calculated by anti-WKB and linear segment interpolation as approximation,then uses the least squares fitting,and after that compares the linear segment interpolation based on the anti-WKB method with it.

提出一种基于反WKB法与分段线性插值的最小二乘拟合方法来确定离子交换玻璃波导的横向折射率分布，它将反WKB法与分段线性插值所计算出的结果作为近似值，然后进行最小二乘拟合，并与基于反WKB的分段线性插值方法进行比较。

Judging by some of the hunting dogs we had seen, we could imagine that finding the father might have been difficult, but among all the hybrid curiosities there were three more or less identifiable types—the liver-colored approximation of a large spaniel, the stretched beagle, and the tall, rail-thin hound with the wrinkled, lugubrious face.

听多了狗儿们的传奇，我们不禁心驰神往，迫不及待地期待着在狩猎季节展开的那个周末能够亲眼目睹看他们的精彩表演。说不定我家的小犬见识了前辈们的光辉榜样，也能励精图治，做出点比追蜥蜴、捉网球更有建树的事业来呢！

Looking to bounce back from defeat against Cesena last weekend, the Calabrian boss will be sticking to his tried and tested 4-3-3, with Lopez and Sedivic joined up front in Giampaolo's absence by either Nanni or Plasmati.

鉴于上周末对切塞纳的比赛中反败为胜，这支南方球队将会更坚持其一贯而有效的4-3-3阵型，洛佩斯和塞德维奇将取代受伤缺席的詹保罗，和纳尼或者帕斯马蒂中的一个搭档锋线。

Meanwhile, their exposure to the more freewheeling ways of the West broadened dramatically.

另外，西方较自由的生活方式对年轻人的影响增大。