概率分布

With increasment ofE/N,electron average energy and probabilities of electric excitation,dissociation,ionization,dissociative ionization collisions are increased.

随着E/N的升高，电子平均能量升高，发生激发、离化、电离和离化电离碰撞的概率增大；非均匀分布的电场使分子获得更高的离化率，同时显著增强出射电子的能量。

On the basis of equal probability principle, Boltzmann statistic s and ensemble statistic s, this paper has derived the statistic al distribution function on multimember system in the quasi-independent particles and obtained the equivalence between

文摘：利用平衡态统计物理的等概率原理，玻耳兹曼统计法和系综统计法，导出在平衡状态下多种近独立粒子系统的粒子数分布。结果表明，对于宏观系统而言，玻耳兹曼统计和系综统计是等价的。

For the disadvantage of the color distributions that it can not accurately track scale of the object due to the fact that it omits spatial information, a probabilistic tracking algorithm based on the Spatially Constrained Color Model is proposed.

针对基于颜色分布的目标模型完全忽略了空间信息，难以准确跟踪目标尺度变化的缺点，提出了一种基于空间约束颜色模型的概率目标跟踪算法。

An equal cross-section blade was investigated and a finite element model was built parametrically. Geometrical parameters (such as length, width and thickness), material parameters (such as young's modulus and density) and speed of blade were considered as input random variables while the static frequencies and dynamic frequencies were output random variables. Combining the finite element method, response surface method and Monte Carlo method, the statistical properties and cumulative distribution functions of static frequencies and dynamic frequencies were obtained. Probability sensitivities analysis, which combined the slope of the gradient and the width of the scatter range of the random input variables, was applied to quantitatively evaluate the sensitivities of static frequencies and dynamic frequencies with respect to the random variables. The Scatter plots of structural responses with respect to the random input variables were illustrated how to adjust the values of the static frequencies and dynamic frequencies by changing input random variables.

文中以某试验台用汽轮机等直叶片为研究对象，考虑几何参数、材料参数和转速的随机性，通过有限元参数化建模，将确定性有限元方法、响应面方法和Monte-Carlo模拟法相结合，从而获得了叶片静频、动频的统计特性和累积分布函数；同时考虑随机变量的梯度和离散范围对静、动频的影响，通过概率敏感性分析，定量地判断出叶片静、动频对随机输入变量的敏感性；通过绘制叶片静、动频与输入变量的散点图，定量地分析了如何改变随机变量以调整静、动频率的方法。

The theoretical and experimental probability density distribution for the particle velocity follows normal law and is hardly affected by the particle characteristics.

颗粒的理论与实测的速度概率密度与颗粒物性关系不大且都遵循正态分布。

Dependencies among random variables, interaction between expectations and covariances, as well as the correction of covariance to expectation are all considered.

在正态分布的前提下，利用线性化系统模型，从某些系统参数的概率特性计算出特征根实部的均值、方差，而全系统的稳定

Also: the renewal theorem, conditional probability and expectation, regular conditional distributions, stationary sequences aud the bergodic theorem, martingales, and the optimal stopping theorem.

更新理论，条件概率和期望，规则的条件分布，平稳序列和 bergodic 定理，鞅，最优停步理论。泊松过程，布朗运动，强马尔可夫性和不变原则。

The model of slope rockfall is built up, at the same time, the random probabilistic method is used to predict the route of rockfall induced by surface-mining. In accordance with the spatial and kinetic distribution of the rockfalls, the strength and geometric parameters of barriers are designed.

建立了露天矿边坡滚石运动模型，采用随机概率方法对工程实例露天矿边坡滚石轨迹进行预测，并依据滚石落点的空间位置、弹跳高度及其动能分布，提出了防护措施、设计拦截网防护的高度与强度。

The method could be used for all sorts of random variable using equiprobable transform formula. Studied the influence of the integrate points to the response random.

通过随机变量的等概率变换，这一方法可以应用到任意分布形式的随机变量上；进一步，考察不同积分点数目对响应随机量的影响，结果显示，在很少的积分点下，响应均值就能达到较高的精度，随着积分数目的增加，响应方差的精度逐步提高。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。