查询词典 perturbative

We present a new method of perturbative expansion in quantum chromodynamics with gluon background fields,which can be used at high,intermediate and low energy scales,and the corresponding Feynman rules are given.

对于具有胶子背景场的量子色动力学，从变分微扰论出发，通过对场作标度变换，把格林函数按一个合适的参数展开，提出了一种既适合于高能区也适合于中低能区的新的微扰展开方法，并给出了相应的费曼规则。

There are many methods in dealing with this problem, such as naive factorization, QCD factorization approach, perturbative QCDfactorization approach, etc.

长期以来，为了提高强子矩阵元计算的精度，人们提出了多种因子化方法，例如：简单因子化方法、QCD因子化方法、pQCD因子化方法，等等。

In the framework of Feynman diagram calculation, two pieces of work were accomplished with thestandard application of perturbative manipulation of radiative corrections.

最小超对称标准模型，是粒子物理标准模型之外的新物理的最有希望的理论之一。为检验这种模型，有必要进行一些高阶的微扰论计算。

Further application of the partially perturbative density functional theory to MX2-NX-H2O solution indicates that the present theory is better than the Poisson-Boltzmann equation and can be used to predict the structures and ion-partitioning of high-valent ions in charged nanopores.

对混合电解质溶液MX2-NX-H2O的结果同样表明本文的部分微扰的密度泛函理论要好于传统的Poisson-Boltzmann方程，且能够预测高价离子在带电纳米孔内的结构与分配。

We studied the jets photoproduction and it's application in testing the perturbative QCD theory, as well as the relations of jets cross section to the parton distribution in photon and proton. The dependence of jets cross section on scales is also discussed both in LO and in NLO corrections.

二。讨论了光生过程中的喷注产生及其对微扰QCD理论的检验，讨论了喷注产生截面对光子，质子中的部分子分布的依赖关系，以及喷注产生截面的标度依赖性。

A wave function for laser dressed atom is derived as a perturbative solution of the time-dependent Schrdinger equation in the velocity gauge.

作为含时薛定谔方程的微扰近似解，在速度规范下给出了激光场中缀饰原子的一个波函数。

By the time ordered perturbative theory and factorization, we analyze all the twist-4 evolution processes and get the relation between all the cut graphs, we obtain a new modified equation.

利用时序微扰论并根据因子化定理，我们找到有关扭度-4演化过程的不同切割图之间的联系，归纳出一个新的完整的高扭度修正的演化方程。

Amplitude decoherence is much more sophisticated than phase decoherence. To describe its properties, we develop a method called the short-time perturbative expansions for the state fidelities. This approach is proven to be a useful tool for studying open quantum systems.

振幅消相干要比相位消相干复杂得多，为了完整地描述振幅消相干的特性，我们发展了一种新的处理量子开放系统的方法，即态的保真度的短时微扰展开法，该方法被证明是研究复杂量子开放系统的一个有力的工具。

It contains a review of the Standard Model, covering non-perturbative topics, and a discussion of grand unified theories and magnetic monopoles.

它包含一个标准模型，其中包括非，微扰主题，审查和一个大统一理论和磁单极子的讨论。

Recently the Dyson-Schwinger approach has been a useful tool to study the effects. It has been proven to be successful in developing a hadron phenomenology which interpolates smoothly between the infrared (non-perturbative) and the ultraviolet regime.

最近DS方程的方法已经成为研究动力学手征自发对称性破缺的有效方法，这种方法可以用于微扰问题，也可以用于非微扰问题，可以将红外行为与紫外行为平滑地连接起来。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。