查询词典 simulation

In mathematical simulation theory, stress-strain relation of powder-compactdeformation , equivalent strain velocity equation , and unitary matrix equation ,are deduced.Therefore, feasibility of Multi-Core-Line-Die Powder Extrusion Forming is validated by Research on Mathematical Simulation Theory and Powder Extrusion Forming Technology of Multi-Core-Line-Die, which is a better forming method of metallic carrier.

在数值模拟理论中，推导了粉末体变形的应力-应变关系等效应变速率方程和求解的整体矩阵方程因此，"多芯线粉末挤压成形工艺及其数值模拟理论研究"验证了多芯线粉末挤压成形在工艺上的可行性，是金属载体成形的较好方法。

The comparison of the simulations of the same perturbation in 2D and 3D shows that both are similar before the perturbation arrives at 7 solar radii, and that both have the observed three parts of the classical CMEs. However, the reflecting effect of the adopted boundary conditions at both poles in the 3D simulation has a significant effect on the simulation of more hours, and causes unphysical changes in the polar region, such as the enhancement of density and the change of the magnetic field topology.

从对相同扰动的二维和三维模拟结果的对比来看，在扰动到达7个太阳半径之前，模拟结果相似，都可以模拟出CMEs事件的三部分观测特征，但是三维模拟采用的两极边界条件存在的反射效应，对更长时间的模拟有明显的影响，在两极产生密度增强和磁场位形发生较大变化两个非物理扰动。

Validating simulation model is one of the important aspects for modeling and simulation.

仿真模型验证是建模和仿真的一个重要方面。

ABSTRACT: The UAV navigation system's performance is improved through embedding the geography information model that can process the vector map data in the system by using MapX, In this paper, how to navigate and plan the UAV flight course in the vector map is investigated. The basic control and operation for vector map in the geography information system is introduced, and the flight course is designed and modified in the map. In addition, 2D vector map can't orient UAV in 3D space, so the altitude model is added in the UAV navigation system to realize 3D orientation by integrating 2D vector map with altitude plot. The simulation results in the UAV simulation system indicate that the navigation system can monitor and control UAV efficiently and intuitionally.

使用MapX在无人机导航系统中添加能够处理矢量地图数据的地理信息模块，可以显著地提升系统的性能；文章对如何在矢量地图下进行无人机导航与任务规划进行了研究，完成对地理信息系统中矢量地图的基本控制和操作，并在地理信息图上进行航线的设定与修改；另外，针对二维矢量地图无法对无人机进行三维空间定位的问题，文章通过在无人机导航系统中添加高度位置显示模块，用二维平面地图与高度图相结合的方式来实现对无人机位置的三维定位；通过在无人机仿真实验系统中的使用，证明了该系统能高效、直观地对无人机飞行进行监视与控制。

Using this methood, the vector system equation appllicable to simulation can be established, and numeric simulation can also be conveniently conducted.

利用这种方法可以有效地得到适用于仿真的向量系统方程，也便于直接进行数字仿真。

A method of infrared imaging simulation based on Vega was provided based on the theory of infrared imaging simulation.

鉴于此，在分析红外成像仿真原理的基础上，提出了一种基于Vega的场景红外成像仿真方法。

The experimental data measured by laser Doppler velocimeter are used to validate the simulation results. It shows that the simulation is able to predict these unique transport phenomena.

由激光多普勒测速仪得到的实验数据证实了模拟结果，表明模拟能正确预测此类输运现象。

The velocity distribution of our simulation is in partly agreement with the results of experiment and simulation.

运用该系统对二维管道进行了模拟，得到了管道内流体的速度分布和压强分布，并计算了管道的减阻情况。

And then, we employ numerical simulation to illustrate the advantage of our model compared with Optimal Velocity Model and CDCFM. The simulation results show that in our model, not only the collision occurred at small reaction coefficient in OVM and CDCFM can be avoided, but also the traffic congestion can be suppressed more efficiently.

通过与OVM和CDCFM模型的数值仿真对比研究证明：改进模型不仅可以避免OVM和CDCFM中因为反应系数较小时出现撞车现象的缺陷，同时对交通阻塞能起到有效的抑制作用。

In this paper,a simulation mod- el is proposed to analyze molecule vermiculation resistance,based on the macromolecule Monte Carlo simulation strategy.

本文建立了一种基于高分子Monte Carlo模拟算法，分析分子蠕动阻力的模型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。