查询词典 variational method

Based on variational principle and split-based interpolation finite element method for fast and accurate analysis of normal mode helical antenna,Combination of genetic algorithm and then load the normal mode helical antenna loaded on the value of lumped elements,Load location,and matching network integrated optimal design parameters,And using Sherman-morrisorr Woodbury formula to quickly solce the load component values and load the changed position of the impedance matrix equation to improve the efficiency of optimized design.

采用基于变分原理和剖分插值为基础的有限元法来快速精确分析法向模螺旋天线，然后结合遗传算法对加载法向模螺旋天线上的加载集总元件的值、加载位置以及匹配网络参数进行一体化优化设计，并采用Sherman-Morrisorr Woodbury公式来快速求解加载元件值和加载位置改变后的阻抗矩阵方程，提高优化设计的效率。

Then we present our studies on several novel quantum phenomena in the rotating and molecular BECs. In the averaged vortex approximation, a fast rotating BEC in an anharmonic potential is studied in variational method.

研究结果很好地解释了实验中所呈现出的许多令人迷惑的新奇现象；同时，证明了在非简谐振子势下，快速旋转的BEC中能够形成带多个单位角动量的涡旋。

Combining PRISM theory, MD simulation and Variational method, a single-site semi flexible model is proposed to describe atactic polystyrene melt.

结合PRISM理论、MD分子模拟和变分法，得到了可以描述聚苯乙烯熔体的单点半柔性链模型，提出了一个研究实际聚合物体系的有效方法。

The electronic structures of Dawson anion(S2Mo18O62)4- have been calculated by the discrete variational method coupled with the first principal density functional theory.And the comparison with Keggin anion(SMo12O40)2- has been made.The results show that the electrons delocalize around the all anion.But the difference of the electronic distributi on of polar and equator sites exists.

使用第一原理密度泛函理论中的离散变分方法对（S2Mo18O62）4-的电子结构进行了理论计算，并与Keggin结构（SMo12O40）2-的电子结构作了比较分析，结果表明，（S2Mo18O62）中的电子离域地分布在整个阴离子骨架中，但极位和赤道位原子的电荷分布有明显差异。

The effects of the external electric field on the hydrogenic impurity states in the GaAs quantum wire with a finite confining potential are studied by a variational method.

给出了杂质态结合能在不同的电场强度下随量子线半径、杂质位置的变化关系。

The scaling rule for hydrogenic impurity binding energy and the Virial theorem value in quantum wells and wires of rectangular cross section with three different section ratios are studied through the variational method.

利用变分法计算了矩形量子线和量子阱中类氢杂质束缚能的度规法则和维里定理值。

The variational method and the effective mass approximation are used to calculate the phonon effects on the hydrogenic impurity states in a cylindrical quantum wire with finite deep potential by taking both the couplings of the electron-confined bulk longitudinal optical phonons and the impurity-ion–LO phonons into account.

采用有效质量近似和变分方法，同时考虑电子-约束型体纵光学声子及杂质离子-LO声子耦合，计算了有限深柱形量子线中杂质的极化效应。

Secondly, the ground-state ionization potentials from Lithium-like to Neon-like isoelectronic sequences (Z: 37-82) are calculated systematically by using of MCDF method, and the effect and contribution of electron-correction energy and high-order correct are analyzed in detail, then their variational relations with Z are obtained, these shows that Breit interactions become important for the energy as the nuclear charge Z increases, but that of the QED only fluctuates around 0, then a new extrapolation formulae for IPS along an isoelectronic sequence is set up.

其次，用MCDF理论系统地研究和计算了中高Z元素Li-like到Ne-like等电子系列基态电离能(Z=37-82)，详细分析了电子相关能和高阶修正能量的影响和贡献，得到其等电子系列随Z的变化关系，结果表明Breit贡献随着Z的增加而迅速上升，而QED的贡献随Z的变化不大，仅仅在零上下波动，并建立了不同等电子系列电离能的新拟合公式。

The discrete variational method is an easy master and performable tool, which could be applied to study atomic or molecular electron structures and other properties.

DVM离散变分方法为研究原子或分子的电子结构和其他性质提供了一种易于掌握并简便易行的计算工具。

In contrast to previous procedure, the trial function is optimized synchronistically in the surplus function method, but not before the variational Monte Carlo computation.

与以前的算法相比，本算法中的试探函数的优化是在剩余函数方法中同步进行的，而不是在变分Monte Carlo计算之前。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。