查询词典 potential theory

This theory takes notice of an expanding universe, which creates an increasing background 'gravitational potential'.

这一理论从膨胀的宇宙中得到启发，膨胀的宇宙产生了一个增长的背景"引力势"。

In this thesis the process of constructing the non-perturbative Hamiltonian theory is de-scribed and is applied to estimate the vacuum condensate. It contains the following contents:At the very beginning, by using the path integral method and eliminating the gluon freedom, aGCM action 〓 of current quarks including lower order current-current coupling was derivedfrom the QCD Lagrangian and the effective Hamiltonian operator that could hardly be doneby the normal methods was derived. After doing this, the broken vacuum is introduced whichincludes quark-antiquark condensate through the generalized Bogoliubov-Valatin transformation,the effective Hamiltonian of constituent quark was derived. The detailed formulas containingthe spatial current-current coupling term for the effective Hamiltonian and gap equations wasworked out by parameterizing the correlation kernel as a quadratic potential. And then, the gapequation was solved and the quark-antiquark condensate of vacuum was studied both in the casesof instantaneous interaction and retarded interaction. In the end, the effective Hamiltionian withtwo-body quark-quark interaction was derived with one-body approximation, and with the helpof the functional integral method the coupling non-linear dynamic equations for systems withnuclear matter was derived. Finally, these equations were solved by selfconsistent method andthe effect of nuclear matter on vacuum condensate was studied. The spatial current-current coupling term is too difficult to handle, hence the correlationkernel is assumed to be not important and usually omitted in the pure vacuum condensate, andthe instantaneous interaction generally is adopted. Retaining the spatial current-current termand partial retardation effect, the quark pairs condensate in pure vacuum was studied, and theeffect of quark mass was also studied. At present, little study is focused in the case with nuclearmatter and spatial current-current term also omitted. Under the approximation with partialspatial current-current term, the effect of nuclear matter on vacuum condensate was studied.

本论文描述了量子色动力学整体色对称模型哈密顿量方法的构建过程，得到了反映正反夸克对凝聚真空结构的关于组分夸克的有效哈密顿量算符，它隐含了胶子作用，并且准确至流-流耦合项；接着，通过参数化哈密顿量中的夸克作用关联核，导出平方禁闭势参数化选择的哈密顿量的具体公式和能隙方程；随后，应用公式，编程求解，考察了瞬时作用下和部分延迟作用下真空的正反夸克对凝聚，在计算中保留了空间流-流耦合作用；之后，导出瞬时势和延迟势下包含二体作用项的哈密顿量公式，并采用单体化近似，通过泛函变分方法得到核物质存在时耦合的非线性动力学方程；在保留部分空间双流耦合作用的近似下，求解核物质的动力学方程，考察核物质密度对真空凝聚的影响，以往考察真空凝聚，对关联核的选用，由于空间流-流耦合项不易处理，也认为作用不大，常忽略该项，并且常采用瞬时作用；本文保留空间双流项和部分延迟作用，考察了真空情形的夸克对凝聚，还考察了夸克质量对纯真空凝聚的影响，以往对核物质存在情形的真空凝聚考察很少，也都忽略空间流-流项，本文在考虑部分空间流-流项近似下，考察了核物质存在对真空凝聚的影响。

Using Density Function Theory we receive the ground states of GaN and GaN2 are X 、X2B2 respectively.Murrell-Sorbie analytical potential energy functions of GaN have been derived by using ab initio data and the least-square fitting method, and harmonic frequency, force constant and spectroscopic data also have been calculated.

基于量子化学计算得出GaN和GaN2 基电子态及其离解极限之后，利用计算数据和最小二乘法得到了GaN 的M-S解析势能函数，并计算出各态的谐振频率、力常数和光谱数据。

On the basis of least potential energy theory the stability and convergence are analyzed and discussed in Hilbert space, and the basic condition ensuring uniqueness and convergence of solution is given.

在Hilbert空间内，从最小势能原理出发对非协调数值流形方法的稳定性和收敛性进行了分析和讨论，得到了保证非协调流形元解唯一存在和收敛的基本条件，完善了非协调数值流形方法的理论基础。

The improvement of the determined equipment was including:(1) adoption of the 635nm laser lamp-house whose homochromatism is good;(2) continual feeding device used the auto-feeding device based on the gravity potential energy theory;(3) absorbing pool is the 126μL micro- absorbing pool;(4) signal sensor used silicon electric eye;(5) the photocurrent signal was amplified by single route.

其中对检测装置的改进主要包括：(1)采用单色性良好的635nm的激光光源；(2)连续进样装置采用重力势能原理自动进样器；(3)吸收池采用126微升微量吸收池；(4)信号检测器采用硅光电池；(5)对光电流采用单路信号放大。

ABSTRACT Rheumatoid arthritis is a kind of autoimmunity disease which therapy hardly, It's etiological unknown up to now, The Traditional Chinese medicine has potential superiority on the disease, while modern medicine has so much ill effect. Blood benefited and circulating method has so thick theory background and comprehensive clinical verification, but deficit explanation of modern digit.

类风湿性关节炎是一种难治性自身免疫性疾病，至今病因未明，西医对其治疗存在许多问题，中医药治疗此病具有潜在的优势，养血活血法治疗此病有着浓厚的理论基础及广泛的临床验证，但缺乏现代数字化的解释，这是中医药真正走向世界所急待解决的问题。

The distribution of the electromagnetic field of an uniformly moving electric dipole is calculated by analyzing the electromagnetic potential of the electric dipole and making use of the covariability of electromagnetic field in different inertial frame under the theory of relativity.

本文通过对电偶极子电磁势的分析和相对论下电磁场在不同惯性系中的协变分布，计算了作匀速直线运动的电偶极子的电场和磁场的空间分布

Therefore, the expressions for the displacement and stress components in terms of four displacement potential functions give a general solution for the governing equations in 1D hexagonal QCs. As an application of the above theory, the problem of a circular crack embedded in an infinite 1D hexagonal QC of point group 6mm is considered.

作为应用进而考虑一个无限的，包含一个圆盘状裂纹的一维六方准晶，在裂纹的上下表面受到一均布力作用下，得到了整个准晶体的弹性场和应力强度因子的精确解。

By means of energy method and minimum potential energy principle of elasticity,the elasticity theory analysis of infinitesimal deformation was performed for the concrete filled steel tube.

应用弹性力学中的能量法和最小势能原理，对钢管混凝土进行了小变形下的弹性理论分析。

This has just reached ouraim of establishing a quantum theory of potential scattering inphase space in the sense of the pure quantum mechanics.

这恰好就达到了我们在纯量子力学意义上建立相空间势散射理论的目的。

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。