查询词典 mathematical models

This paper gives some analysis of the working process of the screw compressor with economizer, separates it into three stages: quasi-compression process of the low stage, charge-compression stage, and quasi-compression process of high stage, sets up the mathematical models and its solution of the actual process. The capability increscence of the screw compressor with R717 and R22 after using the economizer has been calculated.

在分析带经济器螺杆制冷循环系统工作机理的基础上，本文着重分析和研究了压缩机的工作过程，把带经济器螺杆制冷压缩机的工作过程分成&准低压级压缩&、&充气——压缩&、&准高压级压缩&三个阶段，并提出了反映该循环实质的数学模型，给出了求解方法，计算了R717、R22两种常用制冷工质的螺杆压缩机在带经济器后的性能增长情况。

The mathematical models of screed unit as well as hydraulic system parts are systematically answered, including the calculation of kinetical model based on hypothesis factors and dynamical model in consideration of forces acting on the screed.

在分析液压部件环节数学模型的基础上，首次系统地推导了熨平机构环节的运动学模型和动力学模型，并对系统的数值计算结果和实验结果作了对比分析。

At the same time it has a simple control structure and can linearize the system even it is unnecessary to know mathematical models and actual parameters of original system.

而且控制结构简单，在无须知道系统的数学模型和具体参数的情况下，即可实现系统的大范围线性化，从而为逆系统方法的工程实现提供了一条有效途径。

At first the physical and mathematical models for multiconductor transmission lines are described, and the traditional mode decomposition method in the frequency-domain and the characteristic method in the time-domain are introduced simply.

为了便于理解和比较，作者首先对时域响应分析的物理、数学模型做了必要的阐述，并对传统的频域模式分解方法和时域特征法进行了简单的介绍。

Discussing the way to develop the nonlinear mathematic model of the governor in the hydroelectrical simulation system and improve it, the phased analyzing/fitting method is introduced in modeling process to deduce the mathematical models of governor start-up and load rejection so as to solve the problems of overspeed starting and nonconvergent vibration during load rejection.

在建模过程中采用分段解析、拟和的方法，推导出了水电仿真中水机调速器开机和甩负荷过程数学模型，解决水机调速器中开机过速和甩负荷过程中振荡不收敛问题。

The available methods of optial system in emulating system are compared with each other in this paper and the photo electrical measurement method is accepted to be the best one.Then,the practical scheme of photoelectrical measurement method and its mathematical models are given,and the measurement error of this method is also analyzed qualitatively.

本文对仿真系统中的光学系统的可能实现方法进行了比较，选择出其中较优秀的方法—光电测量法，给出了光电测量方法的实际实现方案和测量的数学模型，对此方法的测量误差进行了定性分析。

To analyze the dynamic performance of hydraulic hybrid vehicles and to optimize the main design parameters of the hydraulic system, the mathematical models of the hydraulic system are established, which includes bidirectional variable-displacement motor, hydraulic accumulator and other components. The relation between polytropic exponent of bladder accumulator and variation rate of gas volume is defined.

为了分析液驱混合动力车辆的动态特性并优化液压系统的主要设计参数，建立了液压系统双向变量马达、液压蓄能器及其它主要元件的数学模型，定义了气囊式液压蓄能器的多变指数和气体体积变化率之间的关系。

Two kinds of mathematical models have been established for propane dehydrogenation to propene in plug flow and multistage well mixed flow membrane reactor respectively.

建立了模拟实验室膜反应器的两种数学模型：活塞流模型和多级全混流模型。

Secondly, the mathematical models for VE type three eccentric chaotic exciter and forrame rum oil system of chaotic vibratory roller are built. The numerical simulation and chaos identification are finished under different parameters of the exciter. The relationships between the chaotic characteristics of the exciter as well as the rame rum oil system and the parameters of the exciter are investigated.

其次，建立了& CVE—2型三偏心混沌激振器&和混沌振动压路机&机架—振动轮—土&系统的数学模型，并在激振器的不同参数条件下，对数学模型进行了数值仿真和混沌识别；研究了&混沌激振器&和&机架—振动轮—土&系统的混沌特征与激振器参数之间的关系。

Based on the analysis for the moving process of the spade of the straight-spade-typed tree transplanter and the forced state by applying basic theory and studying methods of the soil-machine system mechanics, mathematical models have been derived for calculating the spading resistance.

本文通过对直铲或树木移植机铲刀下铲过程及受力状况的分析，应用土壤—机器系统力学的基本理论和基本研究方法，建立了该铲下铲阻力的数学模型，并由此提出了减小其下铲阻力的方法和措施。

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。