Having proceeded from analyzing the bore wearing and erosion by application of the new method , the mathematical model of simulating the law of the bore wearing as well as that of the relationship between the law of the bore wearing and the muzzle velocity reduction have been established 新方法从分析炮膛磨损烧蚀入手，建立了模拟炮膛磨损规律的数学模型和炮膛磨损规律与火炮初速减退量关系的数学模型。
In this paper , we describe the research and realization of the high - speed data acquisition system applied in initial velocity radar . the sampling rate can reach 40msps , and the resolution is 12 bits . the acquisition speed that the system provides can be altered 本文介绍了基于初速雷达的高速数据采集系统的研制和实现方法，该系统提供了最高40mhz的采样速率、 12位采样精度的数据采集通道，且采样频率可调。
The paper simulate the transient thermal response of projectile wing according to the simulation software , and discuss the ablation characteristic when the projectile wing is in different initial velocity , in different wing shape , in different atmosphere condition and in different material condition 本文通过仿真软件模拟了弹翼的瞬时烧蚀外形，并详细讨论了不同初速、不同翼形、不同气象条件及不同材料条件下的烧蚀特性。
The anti - lock braking processes based on logic threshold control are simulated in the environment of matlab / simulink software . the influences on logic threshold control abs by the factors such as road condition , initial velocity , the changing rate of braking torque , delay time , inertia and load are discussed at the same time 运用matlab simulink软件，对基于逻辑门限控制方法的防抱制动过程进行了计算机模拟，并分析了路面、初速、制动力矩变化率、延迟时间、转动惯量及载荷等因素对逻辑门限控制abs的影响。
As a part of the civil 863 plans , two multiple - contact models for two kinds of braking system are built in the paper , in which contact fields are described as coons surfaces , initial velocity is programmed in fortran . the thermal - mechanical coupling braking processes are simulated for the first time by msc . marc , the general - used nonlinear fem software . time distributions of the velocity , the stress and the temperature of the components under various initial velocity and brake force are obtained , which offer theoretic gist to study the life of the wheel , the disc and so on 作为国家行业863重大课题《铁路机车车辆虚拟样机系统》的一部分，本文在研究接触问题和热?机耦合问题数值方法的基础上，采用国际上通用的非线性有限元分析软件msc . marc建立了踏面制动和盘形制动主要部件的多体接触计算模型，其中用解析方法描述，即用nurb曲线、高斯曲面来描述接触区域，用fortran语言编写定义初速度的用户子程序，首次对两种制动过程热?机耦合进行了数值仿真，定量给出了主要制动部件在不同初速度、不同制动力下各个时刻的速度、应力和温度的变化规律，为研究车轮、闸瓦以及制动盘寿命提供了理论依据。
In this dissertation , the technique of test for the velocity of duplex ammunition has been studied in all respects of design , experiment , theory , computer hardware and software etc . at first the traditional techniques are reviewed and some limitations are pointed out , then a new idea about it is brought forward and a set of system for the test is designed 本文从设计、实验、理论和单片机软硬件等方面对双头弹的弹丸初速测试技术进行深入的研究和探索，回顾和总结了传统的弹丸初速测试方法在双头弹初速测试中的不足之处，提出了新的双头弹弹丸初速测试原理，根据该原理构筑了新型双头弹弹丸初速测试系统的总体方案、硬件子系统方案、软件子系统方案。
