查询词典 atom model

The deformed metal-SWNTs and metal-TCNTs can be transformed to semiconductor or insulator due to deformations resulting to variation of the atomic structure and the nearest-atom transfer integral having relation with the directions.Based on the Boltzmann transport equation and n - electronic energy dispersion relations for individual SWNTs, the theoretical model caculating the current and conductance of the SWNTs is deduced. The low-temperature conductances of undoping or doping SWNTs are studied numerically, the calculated results show that, for the doping SWNTs, the conductance is quantized, i.e.

我们从Boltzmann方程出发，并结合SWNTs的能量色散关系，导出了计算手性SWNTs电导或电流的理论模型，并分别对非掺杂和掺杂SWNTs的低温电导或电流进行数值计算，结果表明：对于非掺杂的SWNTs，其电导是量子化的，即电导随偏压或电子输运能量变化呈跃变的台阶式结构，这些结构随管径增大或温度升高变得不明显；对于掺杂SWNTs，当偏压为某些特定值V_i时，传导电流有跃变，且传导电流的大小、跃变周期及跃变幅度等不是完全由掺杂后的电子浓度决定的，而与管半径R及掺杂后Fermi能级附近的电子态密度有直接关系，随着温度的升高和管径的增大，跃变结构趋于平滑。

According to two_level model of atom, we systematically analyze the quantum reflection and transmission of the vector atomic matter wave with internal structures propagating through a laser beam.

特别是对"粒子隧穿一个势垒是否需要时间"或者"量子隧穿时间是多长"这一问题[14]的讨论在量子力学基本问题研究中一直占有相当重要的地位。

Following the analysis, a new calculation model is developed, which takes the effect of the induced dipole moment of one atom on the polarizability into consideration, and the mathematical expressions are deduced in the cases of macro electric field parallel and perpendicular to the molecular axis, and at a random angle with the axis.

该模型考虑了分子内原子偶极矩对电子位移极化的影响，推导了宏观电场与分子轴平行、垂直、呈任意夹角等典型情况下的非对称双原子分子的电子位移极化率的数学模型。

We did so by representing the results of a series of numerical experiments on a one-dimensional model hydrogen atom.

本文将采用数值计算法来求解含时Schrodinger方程，研究在一维氢原子模型中，外加的平行静电场，不同形状的激光脉冲以及原子处于不同初始态对谐波谱线和电离率的影响。

The present results also demonstrate that the SVRT model for atom-polyatom reaction provides a practical and accurate approach for studying chemical reactions involving polyatomic molecule.

同时也说明在研究多原子参与的化学反应中，SVRT模型是一种实际可行的方法，值得应用到更一般的多原子分子反应体系中去。

There are only two basic concepts in model design:atom and polygon.

提供了两种模型设计的基本概念：元素和多边形。

The results indicated that:(1) It is viable to use the electron affinity energy of the metal atom in the catalyst, and the ortho-/para-substition ratio of phenolic model compounds as parameters. Thereby, the related data of Resole resins catalyzed by different catalysts can be put into the same training set for modelling.

研究结果表明：（1）用催化剂中金属原子的电子亲合能和酚醛模型化合物的邻／对位取代比作为特征参数是可行的，因而可将不同类型催化剂催化的Resole树脂的有关数据合并于同一训练集中进行建模。

As the Atom, several changes are planned including some new features and options to satiate fans while they wait for the new model.

随着原子，几个变化是计划包括一些新的功能和选项，以满足球迷们等待的新模式。

In this work, a single Fe atom and multi Fe atoms as model respectively, holograms recorded in a complete 4π solid angle with different range and magnitude of incident energies are calculated.

分别以单个和多个铁原子为模型，数值模拟了它们在4π立体角范围内、不同范围的入射能量的情况下记录的全息图。

This solvation model is based on atom-weighted solvent accessible surface area .

采用该模型，可以根据原子类型和原子表面，快速而准确地预测分子的水合自由能。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。