查询词典 simulation

Numerical simulation of drawing process of the part has been done by using the FEM. Ultimately the reasonable die surface fo the process has been gaied which is applied in manufacture of the die through the adjustment and amendment of the drawing surfact based the simulation result, hence a guidance to the design of th elative parts.

并运用有限元技术对其成形过程进行数值模拟，根据模拟结果对拉延型面进行调整、修改，最终得到合理的模具型面用于模具的加工制造，并对同类零件的设计起到一定的指导作用。

Dynamic cutting force is a basic parameter and it directly influences relative displacement between tool and workpiece, tool wear and surface quality in turning operation. Therefore, simulation model of dynamic cutting force is an important part of machining physical simulation research. Cutting force models commonly used are empiristic equations. These equations are often based on statistical analysis of machining data, obtained via changing one or more machining parameters, whilst fixing others. But a complete turning process and nature of force can not be accurately described by means of these models.

动态切削力是切削加工过程中的基本参数，其动态变化直接影响加工过程中刀具与工件的相对位移、刀具磨损和表面加工质量等，因此动态切削力的预测仿真建模是切削过程物理仿真研究的基础，但是目前大多使用经验公式描述动态切削力，这些经验公式多少存在一些不足，难以完全真实地反映在整个切削过程中力的变化历程和变化特点。

Based on theories of envelope and discrete mathematics, the geometric models of flutes being machined are theoretically studied, the approaches of checking machining theories and simulation of machining process are discussed, and wireframe or entitative simulation pictures are given.

基于包络和离散数学理论，论文对加工后的刀槽几何模型进行了理论性研究，讨论了成形理论检验及加工过程的仿真方法，给出了加工过程线框的或实体的仿真图形。

General arithmetic frameworks of crop simulation model can be systemically classified by the crop variety, and then on the base of crops" general physiological-ecological process, it is divided into five modules. We synthetically epurate general arithmetic frameworks, covering crops" main dynamics of growth process, such as plant development stage and phenophase, photosynthesis, respiration, dry matter accumulation and partitioning , LAI, yield formation, et al, and introduce parameters to build different crops growth simulation general arithmetic.

根据作物的不同类型，对国内外作物生长模拟模型进行系统分类，再以作物的一般生理生态规律为基础，将作物生长模型划分成五大组成模块，通过系统地分析、综合，提炼作物生长模拟通用算法框架，涵盖了作物阶段发育和物候期、光合作用、呼吸作用、干物质积累和分配、叶面积指数、产量形成等主要的生长动态过程，并采用参数化建立了不同作物的生长模拟模型通用算法。

The simulation example of SMA-13 shows that real road surface texture has the nearly same fractal dimensions with corresponding FIF curve and the application of FIF method in erose curve simulation is feasible.

通过对分形插值函数构成算法和纵向压缩因子取值方法的研究，给出了基于分形插值函数的路断面构造模拟方法和MATLAB语言编制的模拟流程图；对SMA-13马歇尔试件断面构造的拟合分析表明，实际路面断面构造和分形插值曲线在精度范围内具有一致的分维数，说明分形插值方法对路面断面构造等不规则曲线的拟合具有良好的适用性。

Then, to solve the problem of high cost and fatalness in research of IV cooperation, a new, based on car models, IV simulation platform is presented for algorithm simulation of IV cooperation and line-tracking control.

之后，针对智能车辆交互行为研究中试验成本高、危险性大的问题，设计了一套新颖的，搭建于仿真汽车模型上的智能车辆仿真平台，实现了车辆交互行为算法和寻线运动控制算法的仿真。

A prototype system ABCSS(agent-based combat simulation system) was accomplished on the basis of forementioned studies and showed some emerging behaviors during the process of combat simulation.

利用计算机进行作战仿真，可以模拟实际战斗过程和战斗过程中出现的各种现象，增加人们对作战规律的认识和理解，为有关决策部门提供定性和定量的信息。

The study result showed that the system simulation model can simulate the steady and dynamic characteristics of pre-mixed spark ignition gas engine. And the simulation model had certain generalness, which were the same with CNG and LPG.

分别以节气门突变作为激励和负载突变作为扰动，较好地对发动机燃用LPG时的动态工况进行了仿真，并与实测数据进行了对比。

The physics simulation of large spacecraft Single Gimble Control Moment Gyro attitude control and momentum management system was established, making use of three-axis air-bearing table as spacecraft dynamics simulation object. The mathematics model of SGCMG attitude control and momentum management system was deduced.

引言单框架控制力矩陀螺作为航天器姿态控制的执行机构，具有较大输出力矩的能力，控制特性线性度好，并具有很强的抗干扰性和很快响应速度等优点，在国际上己得到广泛应用，并且已经成为长寿命大型航天器首选的执行机构。

This thesis is focus on integration technology of heterogenous distributed system of simulation, based on the demand of Hardware In the Loop Simulation of war industry.

本文针对军工领域的实时半实物仿真系统对异构分布式系统集成的要求，研究了实时分布仿真系统异构集成的体系结构、主要集成技术、和所使用的分布中间什。

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％。