查询词典 simulation

The main contents include ? the foundation of MD simulation cell in Grand Canonical Ensemble;? the establishment of elastic collision mechanism between hydrogen molecules and carbon nanotube walls and arithmetic design;? molecular dynamics simulation details of hydrogen physisorption in single walled carbon nanotube arrays and program design;? the acquirement and analysis of computer simulation results, where the influences of tube diameter, distance between tubes, temperature and pressure on hydrogen physisorption in SWCNTA are investigated in detail.

主要内容为：①巨正则系综分子动力学模拟元胞的创建；②氢分子与碳纳米管壁弹性碰撞机制的建立及算法设计；③碳纳米管阵列物理吸附储氢的分子动力学模拟细节及程序设计；④计算机模拟研究结果的获取与分析，重点研究了管径、管间距、温度和压强对单壁碳纳米管阵列物理吸附储氢的影响。

Based on the analysis of interactions between different systems in the network, it is proved that, for a class of complicated linear switched system network, an equivalent model of ordinary linear switched system exists and the corresponding model is given.(4) Block simulation model of linear switched system is established in Matlab/Simulink environment and, moreover, a linear switched system simulation tool with the function of model automatic generation is developed. With the aid of this simulation tool, influence caused by switching sets on stability characteristic of linear switched system is investigated.

对线性切换系统网络中各系统之间的交互作用作了分析，在此基础上证明了一类复杂线性切换系统网络可用等价的线性切换系统模型来表示，并得到了该等价模型；（4）在Matlab/Simulink环境下建立了线性切换系统的框图仿真模型，并进一步开发了具备模型自动生成功能的线性切换系统仿真工具。

In this paper, we used molecule dynamics simulation technique in researching dielectric property. By analyzing the information that is provided from molecule dynamics simulation, we can got some dielectric properties like dielectric constant and chargeability. Firstly, 3D model of silicon dioxide was been built and geometric optimization was been used to make the model more correctly. Then the model was been put in calculation of molecule dynamics simulation with a definitive temperature.

本文针对氮化硼晶体在极端高温下的介电性能开展研究，首先建立六方氮化硼晶体的微观结构模型，通过几何优化对其进行进一步的结构修正，然后选择合适的力场、系综、积分时间步长和压力温度控制方法，对微观结构模型进行某一温度下的分子动力学计算，动力学计算达到平衡后得到该温度下电介质材料的微观结构模型和动力学特性。

Statistic analysis result shows that the time step is the most important influence factor of simulation precision, and there is relation between simulation error and the setup value of restitution coefficient which the greater the setup value is, the less the simulation error is. Although there is no effect to the total contact time in the course of collision, the value of the time step decides the total contact step, and there is a logarithmic linear correlativity between them.

统计分析结果表明：计算时步是影响模拟精度最重要的因素；模拟误差还同恢复系数的设定值有关，设定值越大，模拟误差就越小；计算时步的大小虽然对碰撞过程的总接触时间影响不大，但是却决定了碰撞过程的总接触时步数，二者之间存在对数线性相关关系

With the development of computer hardware,network,and software technology,and also with the development of social requirements,distributed interactive simulation applications which involve massive complex scene and large quantity of simulation entity objects put high demand on simulation object management capability and scene rendering ability.

随着计算机硬件、软件、网络以及社会需求的发展，分布式交互仿真应用对大规模复杂场景和大量仿真实体对象的管理能力和绘制能力提出了较高的要求。

The unified object model builds a bridge for high efficient data exchange between HLA-based simulation platform and parallel rendering platform,reducing the development workload of integration between them,and supporting the real-time rendering of massive complex scene and large quantity of simulation entity object to help to enhance the timeliness of scene simulation.

随着社会需求的不断发展，在军事作战、娱乐游戏等领域的应用需要大规模分布式仿真系统的支持，这些系统一般涉及到大规模复杂场景和大量仿真实体，对分布式交互仿真系统的对象管理能力和绘制能力提出了较高的要求。

Above contributions can advance the system simulation methodology and composable simulation theory, and promote complex weapon systems\' demonstration and design simulation.

论文的研究属于建模仿真理论的基础性研究，不但丰富和发展了系统仿真方法学，对于组合仿真理论和复杂武器系统的论证与设计仿真也具有重要意义。

The basic concept and characteristics of missile system-of systems combat simulation for effectiveness evaluation were summarized and the problems of simulation model specification were analyzed, then the hierarchical description and composition method based on system-of-systems, entity and behavior was proposed as the modeling methodology of system-of-systems combat simulation, which is SEB composable modeling methodology. Then, the reference model of SEB methodology and the modeling reference view of various hierarchies were discussed.

总结了面向效能评估的导弹体系对对仿真基本概念和特点，分析了体系对抗仿真模型描述中存在的主要问题，在此基础上，提出体系－实体－行为的分层组合描述方法，作为体系对抗仿真的建模方法，即SEB组合建模方法，并给出其参考模型和各个层次建模的参考视圈。

Because of the problem of convergence, the key techniques to complete the one step simulation were explored thoroughly. The geometry mapping method based on finite element model and inverse deformation was developed to get the approximate initial blank for one step simulation. The effective selection of convergence factor in Newton-Raphson method was studied. The divergence criterion in iterative process for one step simulation was put forward. Also the countermeasure to ill equations coefficient matrix was studied.

由于存在收敛性的问题，本文重点研究了一步模拟方法计算机实现的关键技术：提出了基于有限元模型的几何映射方法和反向变形方法来确定初始毛坯的近似解，研究了带收敛因子的Newton-Raphson方法中如何高效地选取收敛因子，提出了一步模拟迭代求解过程中的发散准则，并研究了病态方程组系数矩阵的修正方法。

This article from the start with the basic signal analysis, the Fourier transform, convolution theorem derivation and feasibility studies, and its use of simulation software MATLAB simulation, to be more intuitive signal of the spectrum changes, simulation discrete signal The system response.

本文就从最基本的信号系统分析入手，对傅里叶变换、卷积定理进行推导和论证，并且运用仿真软件MATLAB对其进行仿真，目的是更直观的研究信号的频谱变化关系，仿真离散信号的系统响应。

Looking to bounce back from defeat against Cesena last weekend, the Calabrian boss will be sticking to his tried and tested 4-3-3, with Lopez and Sedivic joined up front in Giampaolo's absence by either Nanni or Plasmati.

鉴于上周末对切塞纳的比赛中反败为胜，这支南方球队将会更坚持其一贯而有效的4-3-3阵型，洛佩斯和塞德维奇将取代受伤缺席的詹保罗，和纳尼或者帕斯马蒂中的一个搭档锋线。

Meanwhile, their exposure to the more freewheeling ways of the West broadened dramatically.

另外，西方较自由的生活方式对年轻人的影响增大。