查询词典 simulation

A theoretical model is built to investigate the simulation of the infrared characteristic of the metal structure with the PCM false target.Structure parameters of the PCM false target that suit for the simulation are investigated numerically.According to the results,further request on the improvement of the thermal conductivity of PCM is presented.An experimental platform is built and the numerical model is validated experimentally.Three key thermal characteristic components of the false tank(barbette,wheel and front armor plate) are manufactured and tested,and good results are obtained.A method for the thermal conductivity enhancing of PCM by using aluminum fins is studied,the influence of the structure parameters of PCM plates to the simulation effects are investigated numerically,and the reasonable configuration parameters of the PCM plates used to simulate the steel plates of different thickness are obtained.In the study of the application of heat convection method in IR false target,a passive infrared simulation system is designed to simulate the infrared characteristic of metal constructions.The system is made up of pipe-plate,pump,receiver,and working fluid.

在相变材料应用于红外示假的研究中，通过数值模拟，研究确定了适用于制作假目标的相变材料各物性参数的范围，分析了相变材料制作假目标的可行性，并根据所得结果，选取石蜡为研究对象，建立了相变材料模拟金属构件红外特征的理论模型，研究了适用于模拟各金属构件红外特征的相变材料假目标的相关结构参数，得出了相变材料假目标模拟各金属构件红外特征的理论结果，并对相变材料的导热系数这一物性提出了进一步的改进要求；搭建了假目标实验平台，验证了所建理论模型的准确性；以坦克假目标为研究对象，制作了炮塔、负重轮和前上装甲板三个坦克假目标的关键红外热特征部件，并进行了野外实验，取得了较好的结果；以添加铝肋片作为改进相变材料导热能力的手段，理论研究了此类导热增强型相变材料的相关结构参数对模拟效果的影响，得出了模拟不同厚度钢板红外特征的导热增强型相变材料的结构参数及模拟效果。

In view of the fact that the complicated power electronic and electric machine system has multiple nonlineerand simulating tests are difficult and costly, the paper analyzes the configuration of the complicated power electronic and electric machine system, studies the model and simulation methods of each section and according to its section complexity, proposes the method of the modeling and simulation method of modeling separately and simulating connectedly to combine the circuit simulation method with the system simulation method.

针对复杂的电力电子电机系统通常具有多个非线性环节，且实验模拟测试困难费用昂贵等问题，采用仿真方法，通过分析复杂电力电子电机系统的结构，并根据其结构特点，研究了其各组成部分的建模与仿真方法，提出了根据各子系统复杂程度单独建模、再从系统角度把电路仿真和系统仿真结合起来联合仿真的仿真研究方法。

The standardized specification language and interactive graphical interface provides users some advanced functions, such as visual modeling of the Combined Continuous/Discrete Event System, management of simulation projects and models, design of experimental frame, experiments of simulation, data storage, real-time and off-line presentation of simulation results, diagrammatic analysis of simulation results.

它采用规范化的描述语言和图形化人机界面，支持用户完成连续—离散事件混合系统建模、仿真项目和模型管理、实验框架设计、仿真实验、数据存储、仿真结果的实时和事后表现、仿真结果的图表分析，具有比较完善的面向对象的多媒体建模和仿真功能，是国内第一个面向对象的多媒体仿真环境。

Sedimentation simulation can be divided into physical simulation and numerical simulation based on the methods of study utilized. Chapter 4 of this dissertation has carried out a physical simulation study about the processes of formation and laws of evolution of the fan delta in Baimiao gas field.

沉积模拟研究按其研究方法不同，可以分为物理模拟和数值模拟，本论文第四章系统开展了白庙气田扇三角洲形成过程及演化规律的物理模拟研究。

Man-in-the-loop simulation is a promising branch of simulation field. This paper presented the theory on man-machine engineering, and established the model of the firer of antitank missile. Then a test software was introduced to identify the characteristic parameters of human. Finally, we performed digital simulation on the missile system including the firer model and used the TIC unequal coefficient method and gray relating method to analysis the simulation results.

摘 要：该文介绍了人机工程中关于对人体建模的理论基础，并在此基础上建立了反坦克导弹射手模型；为确定人的典型特性参数，编制了一套小型测试软件，利用这套软件可以初步辨识出被测人员的特性参数；最后对含有射手的导弹武器系统进行了数字仿真，并用TIC不等式法及灰色关联分析法对仿真结果进行了精度分析。

This thesis is an introduction of the database system, which combines the fuze design and simulation, and it is an introduction of the technology for preconditioning the data in the process of the simulation. It also introduces the design of fuze system, the process of simulation and the application of the database for fuze design and simulation, with the example of the horologe of some fuze system.

本论文介绍了为引信设计、仿真集成系统所开发的数据库系统及仿真数据前处理技术，并以引信系统钟表机构为实例，介绍了引信系统设计、仿真过程及引信系统数据库的应用。

Due to the problems existing in simulation on physical model of fire, such as heavy calculation, high complexity and difficulty in real-time simulation, a new real-time simulation method was raised based on fluid model and GPU acceleration. This method, based on the physical characteristics of fire, such as incompressibility, low density and inviscid, used the fluid equations to calculate the properties of fire. Then by accelerating this method through GPU, the real-time simulation of fire was realized and a realistic effect was achieved.

针对目前基于物理模型模拟火焰的计算量大、复杂度高，很难进行实时模拟的问题，提出了一种基于流体模型和GPU加速的火焰实时模拟方法，该方法根据火焰的不可压缩、低密度、无粘性等特点，通过流体方程计算火焰的物理属性，并将其求解过程在GPU中并行加速，从而大幅度提高了算法的运算速度，实现了火焰的实时模拟，并取得了较真实的模拟效果。

Around the topic, the weak points of the traditional platform is analyzed first, such as complex arithmetic, long calculating time, high needs of hardware and so on. A real time control method based on virtual simulation is suggested to separate the complex positive/negative calculation of space kinematic and real time motion control. And a"3-2-1"type 6DOF platform is designed with the reference of the MAST (Multi-Axis Shaking Table) of MTS. The kinematic and dynamic calculation of the platform is finished. According to the calculating result, the control system of the"3-2-1"type 6DOF platform including 6 linear servo electric cylinders is designed and constructed. And the professional software Pro/E is used to do the 3D model and 6DOF motion simulation of the platform. The motion curves of the pistons of the 6 cylinders are exported with the simulation. At last the control software is programmed with Microsoft Visual Basic 6.0 and realizes the functions with the commands of GE series motion controllers. When loading the motion curves exported with the simulation, every cylinder can follow the curve very well and the platform realizes the hoped 6DOF motion.

围绕选题，本论文首先分析了传统的运动平台控制方法所存在的算法复杂、解算耗时长、硬件需求高的缺点，提出了一种基于虚拟仿真的实时控制方法，该方法将复杂的空间运动学正、反解与实时运动控制相分离；之后，参考MTS公司的MAST多轴振动平台，设计了新型的"3-2-1"型六自由度平台，并进行了运动学及动力学计算，根据相关计算结果，设计与搭建了包括驱动6个直线伺服电动缸在内的"3-2-1"型六自由度平台控制系统；接着，使用Pro/E对"3-2-1"型六自由度平台进行了三维建模和六自由度运动学仿真，并由仿真直接获得了6个直线伺服电动缸的活塞杆的相应运动曲线；最后使用Microsoft Visual Basic 6.0编写了控制软件界面，通过调用GE系列运动控制卡的各种命令函数实现了控制系统的相关功能，而当加载仿真得到的各缸运动曲线后，每缸均能很好地跟踪输入曲线，使平台实现了期望的多自由度运动。

The dissertation mainly studied the key techniques which are the mathematics modeling of cone-beam CT simulation system, and the parallel rapid simulation of the projection imaging with STL phantom models. Then a cone-beam CT simulation system platform was developed, which provided the projection simulation for compounding phantoms, non-point X-ray source and multiple X-ray spectrums.

本文重点研究了锥束CT仿真系统的数学建模、STL样本模型投影成像的并行快速仿真等关键技术，开发构建了一个支持混合样本、非点光源与多光谱投影仿真的锥束CT仿真系统平台。

Simulation and prediction of reservoir lithology is one of the main subjects of reservoir sedimentology and oilfield production. By fan-delta lithology simulation study, a set of technology about reservoir structure simulation and prediction of fan-delta had been established. Through test calculation of different lithologies by using many simulation methodogies, the best simulation methodology for this depositional system had been determined and it is proved to be reliable by practice.

储层岩石相的模拟与预测是储层沉积学和油田实际生产的主要课题之一，通过对扇三角洲露头岩石相的模拟研究，总结出了该类扇三角洲沉积体储层建筑结构的模拟与预测方法，经对不同岩石相多种模拟方法的试运算，给出了对于该类沉积体系的最佳模拟方法，并通过实际检验证明是可信的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。