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The impact of the thickness of volume H-PDLC grating on the wavelength selectivity of Bragg diffraction are simulated numerically, as well as the theoretic relationships among the refractive index modulation, spatial frequency and the H-PDLC diffraction efficiency.

计算机模拟了体光栅厚度对于布拉格衍射波长选择性的影响，以及折射率调制深度、空间频率和H-PDLC光栅衍射效率的关系。

With plastic brainpan product as an example , the plastic melt flow is analyzed and simulated by Moldflow software , and the mold is designed by the adoption of UG software according to the basic process of modern mold design method , leading to reasonable injection molding parameters , optimized mold structure , two dimensional drawing of mold structure and three dimensional shape for NC machining .

以塑料头盖制品为例，按照现代模具设计方法的一般过程，综合运用Moldflow软件进行塑料流动分析和UG软件进行模具设计，得到了合理的注射工艺参数和优化的模具结构，以及模具的二维工程图和用于数控加工的零件三维编程模型。

With plastic brainpan product as an example,the plastic melt flow is analyzed and simulated by Moldflow software,and the mold is designed by the adoption of UG software according to the basic process of modern mold design method,leading to reasonable injection molding parameters,optimized mold structure,two-dimensional drawing of mold structure and three-dimensional shape for NC machining.

黎文峰，苗玉慧，基于UG和Moldflow的塑料模具设计以塑料头盖制品为例，按照现代模具设计方法的一般过程，综合运用M oldflow软件进行塑料流动分析和UG软件进行模具设计，得到了合理的注射工艺参数和优化的模具结构，以及模具的二维工程图和用于数控加工的零件三维编程模型。

On the basis of this model, three regenerative brake control strategies were simulated and analyzed.

在这个仿真平台基础上，对此3种典型的制动控制策略进行仿真分析。

One is tradition algorithm,which consists branch and bound method,improving loop method,cupidity algorithm,MST algorithm,MM algorithm,insertion method.Another is modern optimization algorithm which consists simulated annealing algorithm,artificial immune algorithm,genetic algorithm,ant colony algorithm,particle swarm optimization,Tabu Search,Hopfield neural network.The third is algorithm of DNA computing which is designed by authors.

第一种为传统算法，包括分支定界法、改良回路法、贪婪算法、MST算法、MM算法、插入法等；第二种为现代优化算法，包括模拟退火算法、人工免疫算法、遗传算法、蚁群算法、粒子群优化算法、禁忌搜索算法、Hopfield神经网络算法等；第三种为论文提出的DNA计算算法。

In this paper the evolution of bird populations is simulated as a branching process in random environments.

以随机环境分枝过程模拟鸟类繁衍过程中种群大小的演变。

Using parameters of states and coefficient, we simulated the branching process of young maize radicel and illustrated the simulation results by visualization method.

利用获取的状态分布函数与分支系数，以单位根段长(10mm)为模拟步长，采用随机模拟的方法，生成的玉米胚根的形态结构数据，最后将其可视化。

The segregation of the binary granular mixture in Brazil nut problem was simulated by using discrete element model. The influences of the frequency and the amplitude of the vibration on the segregation are discussed.

采用离散单元模型对巴西果问题进行了模拟研究，采用本数学模型可以准确地预测出垂直机械振动导致的不同大小颗粒的分离现象。

Five main phenomena were found, firstly, the high plasticity clay could well suitable to large deformation, and had strain-hardening behavior obviously, as well as, the little dilatancy; secondly, there was no correlation between stress paths and shear strength but the stress-strain relations were influenced by stress paths; thirdly, the little stress increment ratio, the higher increase speeding of shear stress and breaking strength under the condition of same initial normal stress; the fourth, the relations between normal strain and normal stress in simple shear test was consistent with which in the single-direction compression test, if there was no dilatancy; the last, the curve of relation between stress ratio and shear strain could be well simulated by hyperbola.

试验结果表明，高塑性粘土能够较好地适应大变形，接触面剪应力与切向应变关系呈剪切硬化型曲线，法向剪胀不明显；接触面剪切强度与应力路径无关，应力应变关系与应力路径密切相关；初始法向应力一定，应力增量比越小，剪应力增长越快，对应的破坏剪应力也越高；无剪胀发生情况下，法向应变与法向应力关系曲线与单向压缩试验具有一致性；应力比与切向应变呈良好的双曲线关系。

The data of forest inventory and stem analysis were used to build models about diameter breast-high, high of tree, volume of single timber, stand volume, and these models were correlative to age and stand density. The models were transforming into three-dimension graphs, and the stand growth processes were simulated to visual images.

利用林分调查和解析木数据建立了具有一定适应性的湿地松纸浆林胸径、树高、单株材积和林分蓄积模型，对生长模型进行了图形化表达，并对林分生长过程进行了可视化模拟再现。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。