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Then the voltage source type matrix converter mathematics model is established each in 3-phase static and circumrotate coordinate system, moreover by open-loop simulation, the simulation results show that the voltage source type matrix converter can realize the frequency range very broad sine wave input-output, moreover by regulating circuit parameter, the power factor in input side reaches 1 approximately, realization static VAR compensator function.

然后分别建立了电压源型矩阵变换器在三相坐标系和旋转坐标系下的数学模型，并且对电压源型矩阵变换器进行开环仿真，仿真的结果表明电压源型矩阵变换器能够实现频率范围很广的正弦波输入输出，而且通过调整电路参数使得输入侧的功率因数约为1，实现静止无功补偿器的功能。

And the feasibility of the two measurement methods is demonstrated.3 Computer simulation is performed in the situation of air passing by a heating columned thermistor through a round pipeline. The fluid velocity and temperature distributions under different mass flowrate are shown. They reflect the impact the heating thermistor has on the fluid. The velocity distribution on the surface of the heating thermistor is studied and the impact of natural convection is revealed. The lower limit of measurement based on the simulation result is given.

仿真实验结果给出了不同空气质量流量下加热元件周围流体的速度和温度分布，直观反映了加热元件对流动产生的影响；研究了发热元件表面流体的速度分布，揭示了由浮升力引起的自然对流对流量测量的影响，给出了测量下限值的仿真结果；并通过仿真实验数据验证了恒功率热消散式热式流量计的流量方程。

is presented allowing the adaptive simulation of tubofan compone nt performance adapting to engine particularities.The method can provide accurate simulation for component maps using nonlinear simplx optimization with primary performance particularit ies' function as objective function and coupling coefficient as optimized parameters.

本文以航空发动机部件通用特性为基础运用单纯形优化方法，以发动机主要性能参数和过程参数偏差函数最小为优化目标，以部件特性耦合因子为被优参数，发展了一种预测发动机部件特性的自适应模型方法。

In this paper, a hybrid system high-level ontology is presented as a basic and universal rule for modeling and simulation in different domains.HyHO includes the definitions and attributes of time, state and event,which can be consentaneous in simulation systems.

本文基于对混合系统的分析，提出了混合系统高级本体论HyHO，它包括在混合建模和仿真的不同领域都能通用的最基本的规范，主要包括时间、事件、状态等概念及其属性分析。

The diagram schematics are figured out by using commonly-used chip named 555 timer and 74LS90 conter, tests are given on the simulation in every unit, simulation effect of circuit can be observed in a direct and clear way.

使用常用的芯片555定时器和74LS90计数器设计了电路原理图，对电路的每个单元进行了仿真实验，可以直观地观测出电路的仿真效果。

In view of the ignition systems used on most vehicles, a new kind of misfire simulation method was proposed and a set of electronic controllably misfire simulation device which is convenient, practical and reliable was designed.

针对大多数车辆上使用的点火系统，提出了一种新型失火故障模拟方式，并设计出了一套方便、实用和可靠的电子可控失火故障模拟装置。

As the advancement of computer technology, video image simulation became more and more frequently used in the simulation of craniofacial surgery.

随著资讯科技的进步，视讯影像的模拟逐渐被应用在颜面整形手术的术后

This paper introduces the situation of dynamic simulation of power system, design of power distribution system dynamic simulation based on COM and a multilayer digital control network method based on PLC, which uses digital technology nested of the tradition analog cyanic control method.

介绍了基于COM分布式电力系统动态模拟技术和基于PLC多层数字控制网络电力系统动态模拟控制技术的基本结构和技术要点。

By simulation, the optimal operation conditions were gained in every step in the separation process, and polymerization-class isoprene was gained by the process. And to improve the economy of process, the process was studied by simulation, 99% cyclopentene and 1, 3-pentadiene were gained by continuous separation process. All were the base of the process industrialization.

通过模拟研究，得到分离各步的最佳塔高，进料位置和各种操作条件；并进行了全流程的模拟优化得到聚合级的异戊二烯的各种工艺参数；通过模拟研究对分离工艺进一步深化，得到了从C5中分离出环戊烯和间戊二烯的优化工艺条件，对工艺经济性进一步优化，给过程工业化提供了依据。

The principles, destress results and technical parameters for destress blasting in the side wall of roadway are studied in the field test, numeric simulation and simulation test with equivalent materials.

用现场试验、数值模拟、相似模拟综合方法研究巷帮松裂爆破卸压维护软岩巷道的原理、卸压效果和技术参数。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。