查询词典 variable-density system

In this paper dimension-chain is used to calculate the last effective dimension formed under the influence of tolerances and other distortions. Feature modeling is applied to construct the three-dimension mode of the parts in solidworks. Based on the parametric design function, simulation of assembling result is realized by making use of VB to develop Solidworks. The accomplish of variable parametric design system in tolerance designing is realiazed.

运用尺寸链技术计算出零件在公差及其他变形影响下的最终作用尺寸，利用solidworks中特征建模方法建立起装配体的三维模型，并根据该软件的参数化设计功能，利用VB对其进行二次开发，模拟了装配结果，实现了变参数设计方法在公差设计评价技术上的应用。

Template method was used in IVCD system to quickly and easily build vehicle body concept geometry model and FEM model. This IVCD can integrate body design, analysis and optimization on one CAD platform through parametric variable database and all parametric variables were shared and updated in different phase of IVCD.

IVCD基于车身模板技术，可快速生成车身概念结构几何模型和有限元模型；它还基于参数数据库集成了车身设计、分析和优化，实现了参数共享和更新，并采用知识向导界面，易学易用。

In order to examine how the flight control system of penetration aircraft is affected by the variable wind field, based on a kind of nonlinear dyna〓 tem, a differential game solution of quadratic payoff function is developed, so the worst-case wind model containing nonlinear factors is constructed.

为了考察变化风场对突防飞机飞行控制的影响，推导了一类非线性动力学系统二次型性能指标下的微分对策解，得到一组含有非线性因素的最坏风模型。

Simulation results show that the Filter and VGA system has gain of 6~48 dB, variable gain of 42 dB,6 dB/Step, THD54 dBc at 100 mV peak-to-peak input voltage, IIP3 of-6.35 dBV. The NF is less than 25 dB and current dissipation is 30 mA from 1.8 V voltage supply.

电路的仿真结果表明滤波器和VGA系统的增益为6~48 dB，可变增益为42 dB，6 dB/step，在输入电压峰峰值为100 mV时THD小于-54 dBc，线性度为-6.35 dBV，噪声系数在通带内小于25 dB，消耗电流为30 mA。

A method of permanent magnet synchronous motor ac servo system with variable structure acceleration control is proposed.

本文提出了一种交流永磁同步电机伺服系统的变结构加速度控制法。

And so the conclusion is that the permeation system is believed to be a non-linear and time variable.

结论是扩散池药物经皮渗透系统是一个非线性时变系统。

In order to concern the tax system change resulting in economic structure transformation, the Unit Root Test adopts in the research is the Perron (1989) Unit Root test which considers the variable structure transformation.

为考量税制改变可能造成经济体结构转变的情形发生，故在单根检定时特别采用Perron(1989)考量变数结构转变之单根检定。

The flow field model of port plate pair in condition of the linear axial pressure distribution and dynamic model of flow divider pintle supporting system in abruptly variable load were established. Based on the two models, the balancing characteristics of flow divider pintle in ball piston pump was investigated.

在轴向压力线性分布的条件下，建立了配流副的流场模型，同时建立了配流轴支承系统在突变载荷下的动态仿真模型，在此基础上对球塞式液压泵配流轴的平衡特性进行了研究。

Meanwhile, this paper systematically summarized the present fractional-order control theory results distributed mostly in such aspects as continuous and discrete time domain analysis, approximated numerical analysis, common frequency domain analysis, plane locus method based on variable transposition, etc, and became an effective foundation of forming a complete control and system theory for fractional-order control systems.

同时，论文对当前国内外已有的分数阶控制理论成果进行了较为系统的整理，主要集中在连续和离散时间域分析、近似数值分析、一般复频域分析、基于变量变换的平面根轨迹分析等方面，具有综述性质，是建立一套完整的分数系统控制理论与系统理论的有效基石。

In this paper,the general solution for plane problem of elastic mechanics in polar coordinate system is deduced by separate variable method.

用分离变量法推导出极坐标弹性力学平面问题的一般解，给出了问题的解答全貌，为解决各种具体问题提供了理论基础。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。