参量

Performance parameters of tank GCS were calculated by measuring the movement parameters of the gun and turret with applied force to provide the basis for the approval test of tank GCS.

通过测量受力后火炮与炮塔的运动参量，计算出炮控系统的性能参数，为坦克炮控系统能否定型提供依据。

According to the relative intensities of lines and transition parameters, through linear fit of linear function, two fit parameter are obtained.

根据光谱线相对强度和跃迁特性参数值，通过线性拟合一次函数，得到两个拟合参量。

The main research tasks and results are as follows:(1) Through comparing the stress intensity factor of compact tension specimen calculated by finite element software with the theoretical value, the feasibility of calculating fracture parameters of crack tip in ABAQUS software was verified.(2) The relationship between the elastic modulus of the material and research scale was studied based on deriving the cohesive stress theory and other relevant theories. And the elastic modulus of the material on meso-scale was determined.(3) Global model and sub-model of the finite element were built in th...e macro-scale, and stress-strain field nearby the crack tip was analyzed, and the results show that the detailed stress-strain in the crack tip could be obtained by using the sub-model technique.(4) In meso-scale, the crack growth model was also established by assuming the crack propagating along the grain boundary, and the detailed stress-strain field in the crack tip was obtained.(5) The effect of crack length on Von Mises stress, and maximum principal stress and strain was analyzed in meso-scale when equivalent KI equals 30MPa.m1/2. And the results show that except for crack tip area, the stress-strain distribution in whole specimen is not affected.

主要完成研究内容和取得成果如下：(1)利用有限元软件计算出紧凑拉伸试样的裂纹尖端应力强度因子KI值，其结果与理论值一致，从而验证了利用ABAQUS计算裂纹尖端相关断裂参量的可行性；(2)在研究内聚应力等相关理论的基础上，推导出了研究尺度与材料弹性模量的近似关系，并确定了介观尺度上的弹性模量；(3)在宏观尺度上建立了全局有限元计算模型和子模型，得到了裂纹尖端应力应变场分布，结果表明利用子模型技术获得比较准确的裂纹尖端应力应变场分布是可行的；(4)在介观尺度上利用平均晶粒尺度的方式建立了裂纹沿晶扩展模型，得到了裂纹尖端断裂过程区的微观应力应变场；(5)当应力强度因子为30MPa.m1/2时，分析了介观尺度上在裂纹沿晶扩展过程中裂纹长度对Mises应力、最大主应力和应变的影响，结果表明，裂纹扩展长度对试样整体应力应变分布影响不大，而对裂纹尖端区域有较大影响；(6)介。。。

Further ,programs can draw some curves after receiving some essential factors of impacting and common parameters of rod and target.

通过输入弹、靶普通参数及碰撞的基本条件，计算程序即可给出各基本参量间的关系曲线。

The file read by the built-in function execfile is a code block. The string argument passed to the built-in function eval and to the exec statement is a code block.

内建函数 execfile读取的文件是代码块，传递给内禀函数 eval和语句 exec 的字符串参量是代码块。

The distributions of stresses and strains on the section of strengthened beam are analyzed. The different formulas for the calculation of internal forces of section are deduced according to the different development stages of strain and a flow diagram for the calculation is established. With the program based on the diagram, the internal forces and some relevant parameters of the strengthened beams are calculated and the main factors which affect the ultimate bearing capacity of the beams are discussed.

分析中，着重研究了加固梁的截面应力、应变分布特点及可能出现的变化情况，给出了截面应力合力的计算公式并给出了计算框图，依据框图编程对影响加固梁正截面承载力的相关变化参量进行了计算分析并对影响极限承载力的主要因素进行了分析讨论。

The instant respond of step angle input of steering wheel is used to signify vehicle handling stability, analyze and evaluate the basic parameters of handling stability to improve it and provide the optimum result before producing actual prototypes.

通过转向盘角阶跃输入下的瞬态响应来表征汽车的操纵稳定性，分析评价操纵稳定性的基本参量并据此进行改进，在生产实际样车前提供更加优化的结果。

The result shows stochastic resonance phenomena existing in two different regions. One is the traditional bistable region,the other is the coexistence of the oscillation with the stable state.

利用Fink等提出的反应模型，通过计算机模拟对体系的控制参量进行周期调制和随机调制，在简单双稳区以及振荡与稳态的共存区，观察到随机共振(Stochastic Resonance： SR)现象。

It will obtain the relationship between sound-absorbing coefficient and the effective parameters, and draw the relationship figures with MatLab.

用Matlab程序实现吸声系数、反射系数与各个参量变化关系的模拟，绘制关系曲线。

At the beginning of the thesis, the structure of usually used radome is introduced and the parameters of electromagntic characters are described in Chapter Ⅰ; the different methods for analysis of the electromagnetic characters of radome are summarized in Chapter Ⅱ; the propagation of 3-D beam in free space is conducted in Chapter Ⅲ; then in Chapter Ⅳ, the 3-D Complex Ray Theory are analyzed and the characters of transmitted field of sum and difference beams through radome are studied, and the relative formulations of calculation are rekened; at last the electromagnetic characters of the ellipsoidal sandwich radome and the plane single-layered radome are discussed, and suggestions for optimization of electromagnetic properties of radome are given.

本文第一章介绍了常用雷达罩的结构和描述雷达罩电磁特性的参量，第二章概述了目前分析雷达罩电磁特性所采用的各种方法，第三章分析了三维波束在自由空间传输特性，第四章研究了三维复射线理论，并应用它分析了单脉冲和差波束穿过雷达罩透射场的特性，导出了有关计算公式，在第五章，通过大量的数值计算和实验研究，讨论了椭球形三层夹心状实用雷达罩和单层介质平板模拟雷达罩的电磁特性，并提供了雷达罩电气特性优化的建议。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。