查询词典 simulations

Quasi-static deformation of granular materials was examined by performing discrete element simulations on polydisperse systems of elastic-perfectly plastic spheres in a periodic cell.

0引言沙石、土壤及粉末材料等的宏观变形力学性能在某种程度上由其组成颗粒的特性及颗粒间接触的力–变形行为所决定。

To further enhance the security and connectivity for wireless sensor networks,proposed an improved key management scheme.introduced the scheme,a random key predistribution using multiple key spaces and multipath key reinforcement was based on group-based deployment model which in the paper of du wen-liang.analysis and simulations show that the scheme has lower memory and communication overheads, better ability against attacks besides good security performance.

为了进一步提高无线传感器网络的安全连通性，在分析du wen-liang等人的group-based节点投放模型的基础上，提出了一种改进的密钥管理方案：多密钥空间与多路径增强相结合的随机密钥预分配方案。结果分析表明，该方案需要较少的内存存储空间，不仅提高了系统的连通性，还降低了节点的被捕获概率。

Through research of simulations,the traffic control simulation system based on data fusion is realized preliminarily.

通过大量的仿真研究，初步实现了一个基于数据融合的交通控制仿真系统。

Simulations results can forecast procreant positions of cracks, forming etc and serious degree, and academic explanations was provided.

试验采用自制的模具，在570℃时对AZ91D镁合金半固态进行了触变成型及触变流动性能试验研究。

A set of quadruply coupled equations (fluid flow, convection-diffusion, energy conservation and mechanical equilibrium) with a number of cross-couplings and coupled constitutive relations is formulated to quantify the multi-physics of oil displacement by CO2 injection, implemented into and solved by using FEMLAB. FEMLAB is the first engineering tool that performs equation-based multi-physics modeling in an interactive environment. With FEMLAB, the coupled multi-physics model can be solved simultaneously. The applicability of this model has been demonstrated through an example of simulations for a two-dimensional reservoir of size 1000 m×1000 m with one injection and one production wells. Model results illustrate the significant importance of the cross-couplings between individual (thermal, hydrological, chemical and mechanical) physics.

首先，建立一套流、固、热、多相流等多场全耦合控制方程组及其相应的耦合本构关系；然后，采用FEMLAB为工具来模拟三次采油阶段CO2驱油过程中的流、固、热、物质守恒等多场之间的全耦合作用，是第一个人机交互式的基于偏微分方程组的多物理场耦合分析的工程工具，利用FEMLAB，该4个耦合方程组成的方程组可以一次同时被求解出来：最后，应用该模型来求解一个二维油田的驱油情况，数值计算结果表明，原位应力、注入温度、注入压力等因素对CO2的地下贮存效率、驱油速度等有重要影响。

In addition,the numerical simulations of moisture behavior in fixed dune during the growth of Nitraria tangutorum and rainless period in June and August were conducted.

以野外实测数据为基础，运用数理统计方法确定非饱和导水率水分扩散率等沙丘水分运动参数，并从宏观角度建立了与水面蒸发强度沙丘水分含量相关的附加根系吸水项的白刺根系吸水模型。

Secondly,two regulatable current sources for exicitation of magenetic powder dynamic brake are studied respectively with buck and interleaving two-transistor forward topology. In the power supply with interleaving two-transistor forward topology design,simulations are implemented with Saber simulator,thus the best parameters are achieved which ensured the stability and dynamic characteristic.

二、分别用 BUCK 式和交错并联的双管正激式电路拓扑，研制了磁粉制动器的直流励磁电流源，其中对于交错并联双管正激式的电路进行了基于 Saber 的仿真，确保了电路参数的选取能够保证电路稳定性与动态性能要求。

How to solve the Fokker-Planck equation depicting the kinetics of dc SQUID with a resistively shunted resistance will be introduced in Chapter 3. The effect of the shunted resistance is researched using the method of expanding a small parameter and the results are well agreed with the numerical simulations.

第三章主要介绍利用小参数展开的方法近似求解带有桥式电阻的DC SQUID，研究了桥式电阻大小的引入对器件性能的影响，得到了与数值模拟方法一致的结论。

Using the VEP model above, some numerical simulations were carded out to model sea ice ridging process in an idealized rectangular basin.

另外，在对渤海海冰动力过程中的海冰厚度、密集度、速度以及冰内应力进行的48小时数值模拟中，计算的冰厚分布与卫星遥感资料相符合。

The effect of hydrostatic pressure was also considered in this model. Using the VEP model above, some numerical simulations were carried out to model the sea ice ridging process in an idealized rectangular basin.

采用规则区域海冰堆积过程、渤海动力演化过程以及JZ20-2海域海冰参数演化过程对本构模型的可靠性和适用性进行了数值验证。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。