二维分布

Using twodimension model,the radial distributions of dissociation products in coordinate and momentum space and the angular distribution are calculated and analyzed.

使用二维波包模型，计算并分析了解离产物在坐标和速度空间的径向分布以及速度角分布。

This paper also used scenario analysis method to simulate 5 assumptive conditions and compared them in order to afford the scientif.

采用二维水质水量耦合模型模拟大明湖现状下的流速及COD分布，采用情景分析法分析了几种假设情况下大明湖的流速与COD分布，并对几种引水方案进行比较，以便为大明湖的管理提供科学依据。

Secondly, based on the characteristic of two dimensional chrominance histogram of the skin color, an adaptive algorithm is proposed.

在Hsu R L的统计模型的基础上，提出了一种自适应检测算法，该算法根据肤色值在非线性变换后的色度空间的二维直方图分布，自动确定肤色模型的位置，从而能更加准确地描述肤色在一幅图像中的分布情况。

Firstly, the relation between cumulative distribution function and aggregate size are available based on stereological theory.

首先，根据体视学原理，得到了骨料累计分布函数与粒径之间的关系，利用Fortran语言编制程序，计算出骨料的粒径和位置，模拟了混凝土二维圆形骨料的随机分布，随后根据材料的细观结构，建立起了混凝土的数值模型。

A 2D PIC model was used to simulate the PIII process for a planar target. The simulation results in one whole pulse show that the sheath expands with a decreasing speed and the sheath shape would change form elliptically cylindrical to circularly cylindrical. The dose distribution of ion implantation in the target surface is not uniform, and the concentration depth profiles of retained dose are considerably different, in different positions of the target.

本论文采用二维粒子模拟方法对等离子体离子浸没注入技术进行了模拟研究，在一个完整脉冲时段内，等离子体离子浸没注入平板靶的模拟过程表明：等离子体鞘层的扩展先快后慢，鞘层形状由椭圆柱形向圆柱形演化；注入离子剂量在靶表面的分布是非均匀的；在靶的不同位置注入的离子在改性层中的浓度深度分布有显著差别。

Active sites of a certain concentration are distributed randomly over inactive sites, forming the model of two- dimensional lattice of active sites distribution. Diffusion, especially directional diffusion, of the adsorbed particles is taken into account on the basis of ZGB model.

模型假设，一定浓度的活性位随机分布在非活性位上，形成了活性位分布的二维格子模型反应器，并在ZGB模型的基础上，考虑了氧原子和CO分子的表面扩散，特别是引进了吸附粒子的定向表面扩散。

According to the theory of beam phase space , the projective density distributions in four dimensional and two dimensional trace space are derived for some space charge distributions often used in accelerator physics. And, the relation between beam emittance and brightness with density distributions is developed too.

针对加速器中几种常用的束流密度相空间分布形式，根据束流相空间理论，推得了它们在四维和二维径迹空间中的投影密度，并给出了束流发射度和亮度与束流密度分布的关系式，为加速器束流测量和束流诊断提供理论依据。

Heat transfer and velocity distribution in the flow of a cold,two-dimensional vertical liquid jet against an isothermal hot,horizontal plate were studied,by using similarity transformation and Crocco transformation.

研究了二维冷液体射流垂直冲击一个恒温热平面时，射流沿平面的热量传输和速度分布。通过对Crocco变换加以推广，求得了问题的相似解，揭示了速度梯度，温度分布和剪切力之间的关系。

Two dimension mathematical model of the tube reactor for dimethyl ether synthesis from methanol was established The temperature and concentration profiles in axial and radial direction for this tube reactor with change of operating condition were obtained with finite difference method,so as to provide design data for developing largescale plant of synthesizing dimethyl ether from methano

通过对甲醇气相脱水制二甲醚反应特点的研究，提出了使用拟等温管式反应器的概念；并用二维数学模型进行了数学模拟；在该模型上进行了操作条件对催化床温度分布影响的模拟研究，从而提出了该反应器的结构尺寸，为甲醇气相脱水制二甲醚的大型化开发提供了设计依据。

The crack and stress-strain of Chinese White Poplar were studied by the box counting method. The results showed that the cracks were obvious fractal and that the value of dimension D was determined to be between 1.2～1.5 by studying the crack propagation in the two dimensions. By comparing the crack propagation over a period of time, we found that the value of D increased as the crack increased.

运用数盒子法对裂纹发育带在二维平面内的分布进行了分形特征研究，发现木材裂纹具有明显的分形规律，分形维数为1.2～1.5；通过比较不同时间段的裂纹发育情况，发现裂纹的分形维数随着裂纹的扩展呈增加的趋势。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！