拓扑地

A simulation is done between MAODV and AODV with software. From the simulation results under different node speed, it indicates that MAODV could decrease the average of ETE delay and offer lower routing overhead effectively. MAODV can complete routing discovery, package retransfer and self-organize when the network topology is changed, MAODV routing protocol is useful to establish Ad hoc networks in military communication.

应用软件对MAODV路由协议和传统的ADOV路由协议进行了仿真，通过在节点不同移动速度下的网络性能进行仿真比较，结果表明，MAODV路由协议能有效地减小分组端到端传输的平均时延，降低协议开销，能够根据网络的拓扑变化进行自组织，完成路由的发现和分组的中转等基本功能，为自组网在军用通信中的运用奠定了基础。

Based on the above studies, a level set algorithm 4.1 for topology optimization with general objective functions, multi-constraints, multi-materials and multi-load cases is proposed.

在优化过程中，这种方法依靠材料界面运动不断地融合、分裂、生成和消除内部的孔，来改变结构中材料界面的拓扑和形状，获得最优解。

Users can use AntsManager to set or modify the topology of each experiment, link state values and QoS requirements of packets transmission process. System can automatically create configuration files according to these settings, startup corresponding active routing application program and directly present the routing result of active packets to users in dynamic style.

应用AntsManager软件，用户可以设置或者修改实验的拓扑结构、各链路参数的取值，以及报文传输过程中的QoS需求；系统将根据这些设置自动生成配置文件和脚本文件、启动相应的主动路由应用程序，并以动画形式将主动包的选路结果直观地呈现给用户。

When ultra-light materials with periodic micro-structures are manufactured and applied in engineering,there always exist stochastic variations in matrix materials,topology and size of microstructures,etc.

具有周期性胞元的超轻质材料在制造和应用过程中，不可避免地会出现基体材料、微结构拓扑和尺寸的随机性变化。

Therefore, topology of second-order tensor field around a degenerate point is determined and theoritic foundation of visualization of the second-order tensor field is built.

从而，定性地确定了简单"退化点"附近特征向量轨迹的拓扑结构。为进一步进行二阶张量场的可视化奠定了理论基础。

In Chapter One we introduce briefly the historic background and notions of topological system and some known results about topological system in one dimension.

在第一章中，我们简单地介绍了拓扑动力系统的历史背景和一些基本概念以及一维动力系统中的一些已知结果。

This paper, which focused on the structure optimization theory and method, has finished such studies as follows: The three dimension model has been built, which provide the necessary conditions for the building of the dynamics equivalent model. By the launch dynamics simulation, the loads of the key joints when the rocket is launched has been got, which provide the necessary data for the finite element analysis and the structure optimization. The finite element model of the excess weight parts of the rocket has been built, buy the finite element intension analysis of the model in two conditions, the displacement and the stress of the key points have been got, which make us know the distributing of the stress and the transmogrification of the part. To satisfy the intension and the precision design request and to decrease the weight of the part as many as possible, the part has been topology optimized by the structure optimization theory and method. After that, the new model has been analysis in structure and launch dynamics. The contrast of the character change of the old part and the new part and the influence on the rocket system have been studied.

本文以结构优化理论和方法为核心，主要做了以下工作：建立了某自行火箭炮全炮三维实体模型，为建立该火箭炮系统的动力学等效模型提供了必要条件，进行了发射动力学仿真，得到该火箭炮发射装置各关键连接部位在发射状态下的载荷，为有限元分析和结构优化提供了必需的数据；建立了该火箭炮发射装置超重部分的有限元模型，分两种工况，对模型进行了有限元强度分析，得出了关键部位的位移和应力值，对其的应力和变形分布有了具体的了解；运用结构优化的理论和方法，对该火箭炮发射装置超重部分进行了拓扑优化，使其在满足强度和精度的要求下尽可能多地减轻重量，对优化后得到的模型进行了结构分析和发射动力学分析，对比了该部件优化前后的特性变化以及对火箭炮系统的影响。

Duan from a general φ-mappingmethod and can be completely formulated by a unit vector field with sin-gularities.

该拓扑流普遍地从φ-映射方法出发，可用带奇点的单位矢量场完全表达。

By means of finite element-topological optimization method,firstly,the structure static analysis for the moving platen of injection molding machine was analyzed with hyperworks software.the stress distributions were obtained veraciously,and then the structure of the moving platen was optimized according to the variable density method.the best scheme of material distribution was proposed.the design stiffness of the product was improved;the aim of lightweight for the structure was also achieved.the process of...

采用先进的有限元-拓扑优化方法，应用hyperworks软件对注射机移动模板进行结构静力分析，准确获得应力分布，并按照变密度法对其进行结构优化，提出了移动模板材料的最佳分布方案，不仅提高产品设计刚度，还达到结构轻量化的目标。该分析及优化过程对目前应用较广的箱式模板设计具有重要的工程参考价值，能有效地解决工程设计中的实际问题。

To guarantee the simulation results correction and speedup the simulation, the scheme for efficient PAPSoCS is proposed and the virtual topology star is constructed to match the path of messae passing for solving algorithm-architecture adequation problem.

为保证仿真结果的正确和提高仿真速率，所提出的连续系统的高效的部分异步并行仿真方案和适应消息传递的星型虚拟拓扑结构方案可有效地解决连续系统仿真的&算法-结构匹配问题&。

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。