动力学变量

In this paper, a fluid dynamics model of hydaulicline including frequency-dependent friction is developed andits approaximate expression is got. Two mathematical treat-ments for the approximation are considered.

l引言 由于在液压系统动力学中，液压管道的动力响应有重要影响，所以建立管道的动态模型，特别是准确反映液压管道内各变量间传递关系的分布参数模型，就成为一个重要问题。

Point reactor dynamic equation is a simple equation that not considered reactor space factor, it was used to calculate the dynamic proliferation of reactors because there is no space variable , otherwise it can be used to calculate coupled with the thermal feedback to get the number of neutron density changes situation.

点堆动力学方程是不考虑反应堆空间特性的简单方程，由于没有空间变量所以它通常被用来计算反应堆的动态增殖特性，而且可以用来与热工耦合计算有反馈的中子数密度变化情况。

The system is reduced to an EulerPoinsot motion perturbed by a small periodic excitation.

利用动量矩变量列写动力学方程，并将系统化作受周期微扰作用下的Euler-Poinsot运动。

The model of programmed crystallization of SPM was proposed based on the moment transformation of the population considering the agglomeration. The optimal temperature-time curves in a batch crystallizer which maximized the terminal mean size and mean weight size can be determined from the application of the Pontryagin Maximum Principle. The calculated crystallization results heating under optimal temperature were compared with ones under linear or natural heating temperature.

根据第四章所得到的螺旋霉素晶体二次成核和晶体生长和布朗扩散引起的聚集动力学，利用第六章所描述的晶体尺寸分布的各阶矩对时间的一阶导数所构成的自封闭的一阶常微分方程组，采用庞得里亚金极大值原理，以温度为控制变量，在满足某些约束条件下，以最大平均尺寸和最大晶体重量平均尺寸为性能指标，计算出了螺旋霉素间歇结晶的最优温度—时间曲线，并同线性加热和自然方式进行了比较。

A numerical method using high resolution scheme was established for the real gas which is described with properties or.

推导出一种用密度和内能或密度和比内能描述的真实气体的高分辨率数值格式，采用IF97计算公式设计相应的以为变量的水和水蒸气性质表，并用一种快速插值的方法将表格中的水和水蒸气状态参数应用到流体动力学计算中。

In this project, a general modal synthetical method based on the hybrid energy and hybrid variable method willbe firstly established, and the three-dimensional stochastic dynamic model of compound systems will be proposed.

本项研究将以发展基于混合能与混合变量方法的广义模态综合法为突破口，建立相对运动复合系统全三维耦合随机动力学分析模型。

The initial value susceptivity and the longest forecastble time, the least number of independent variable , the chaos degree and the average forecastable time of the system have been calculated.

并从混沌学的角度讨论了煤自然氧化时间序列的混沌特性、系统独立变量的最小数目以及系统的混沌度等混沌动力学参数。

This paper analyzes the characteristic and variables of the ordnance supply system, gives the flow chart of the system, sets up the mathematical model of the system in system dynamics and gives an example.

本文分析了军械供应系统的特点、各类变量并进行了系统的结构分析，给出了系统的流图，运用系统动力学建立了军械供应系统的模型，最后进行了举例分析，目的在于为进一步研究提供基础。

Based on the ETA/VPG and LS-DYNA software platform and "vehicle-barrier-curve-road" integrated system dynamics model, in the research, the orthogonal experimental design method and the dynamic explicit finite element method were applied jointedly. The rear wheel elevation was considered as criterion for evaluation and six cross-sectional shape design variables were created. The application of L25 (5^6) orthogonal table for simulation and the use of SPSS statistical package help the variance analysis of simulation results, and the influence levels of various factors were studied to determine the optimal parameters of concrete barrier.

为此，以NJ型混凝土护栏尺寸参数为参考基础，以防撞等级为SS级的护栏为研究目标，以大型客车总质量为18t、碰撞速度为80km/h、碰撞角度为20°的碰撞条件为研究工况，基于eta/VPG及Ls-dyna软件平台及&汽车－护栏－弯道&一体化车－路系统动力学模型，联合应用正交试验设计方法及动态显式有限元方法，以客车后轮抬高量为考核指标，对控制弯道混凝土护栏截面形状的6个设计变量，应用L25(5^6)正交试验表安排仿真试验，借助SPSS统计软件包，对仿真试验结果进行了方差分析，找出了各因素对结果的影响程度，并据此确定了弯道混凝土护栏的最佳尺寸参数。

Further, relied on the analysis of dynamics of the system, a mathematical model structure with some unknown physical parameters was derived and a state space equation was approximated by using linearize method and state variable technique.

通过系统的动力学分析，推导了一个含有某些待定参数的数学模型结构，并应用线性化和状态变量技术求得了系统的状态方程式。

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。