运动方程

Based on the analysis of the forces exerted on particles in air flow, the track equation which describe particles jetted from nozzle in air sampler and formula between the track and design parameters of impactor are obtained.

本文从颗粒在气流中的受力情况分析入手，得到冲击采样器中喷嘴喷出后颗粒的运动轨迹方程以及运动轨迹与采样器切割头设计参数的关系式。

In this paper the dynamics characteristics are analyzed theoretically at first. According to the unique configuration and mechanics characteristics, the mechanics model and kinetic differential equation of the half-tracked air-cushion vehicle are established. Algorithm of mechanics and lifting-state parameters are put forward and analyzed. And variation ranges of the driving state parameters are obtained and the corresponding influence factors are analyzed. The further qualitative studies on control model are carried out.

因此，本文首先从理论上分析了半履带式气垫车的动力学特性，根据半履带式气垫车的独特结构和力学特性，建立了半履带式气垫车的力学模型和相应的运动微分方程，提出并分析了在纵摇与升沉运动时，半履带式气垫车的力学参数和垫升状态参数的计算方法，得到了在行驶过程中各运行状态参数的变化规律，并分析了相应的影响因素，进而对控制对象模型进行了定性研究。

Many large highspeed and long runout landslides could fly in the air at the short-range stage. It is necessary to consider the areodynamics effect and ground effect at the short-range stage of landslide where it starts to fly. However, it is difficult to solve the differential equation with analytical solutions.

许多大型高速远程滑坡在近程活动阶段呈现凌空飞行运动，其飞行过程必须考虑空气动力学效应和地面效应，但是直接求解高速滑体凌空飞行运动的偏微分方程是困难的。

The relativity between occlusal interference position and mandibular incisal point moving track on arrowy axis, vertical axis and horizontal axis was analyzed.

采用SAS9.0软件包分析人工干扰部位与下颌侧方运动中切点在矢状轴、垂直轴、水平轴上的运动轨迹的相关性，并试建立直线回归方程。

We did our best to get the optimal methods to make the liquid more atomize, and established a model for gas-liquid mass and heat transfer process of cross-flow RPB.

根据气液两相流在多级离心加速雾化条件下流体的动量与质量方程，分析研究液体的雾化程度、液滴粒径、运动速度与方向、停留时间等，研究液相多级分散的级数、分散方式以及离心力场强度对气液相界面积、传质系数以及气相流阻的影响关系及其规律性，探讨沿旋转床径向使液体均匀雾化的最佳方法，建立旋转床中气液两相的运动与传质数学模型。

Movement stabilization criterion of nonlinear relative rotation system was obtained by transferring the fundamental matrix of the solution of the ordinary differential equation to Jordan canonical .

利用一类周期性变系数线性常微分方程解的基本矩阵的Jordan形，分析一类非线性相对转动系统扭转的运动稳定性，从而得到非线性相对转动周期系统的运动稳定准则。

Through the discussion of the amplitude curves of continue oscillation of simple pendulum ,the idea of the compound pendulum stability of ships is presented.

通过船舶横摇运动微分方程的解，引入虚静倾角概念；讨论连续单摆运动的摆幅曲线，提出船舶的多摆稳性问题。

To study the taxiing-induced dynamic response of the aircraft with multiple wheels and multiple landing gears due to runway unevenness, base on several reasonable and necessary assumptions, the mathematical model of aircraft in taxiing is established using the d'alembert's principle. It can simulate taxiing inpact properties accurately, it considers in detail the vertical and horizontal motion and pitching about its center of gravity and the significant symmetric elastic modes.

在一些必要合理的假设下，利用达朗贝尔原理，建立了多轮多支柱式及小车式起落架飞机地面滑跑动态响应分析的全机模型，考虑全机沉浮、机体弹性和定常气动力的影响，起落架支柱的弹性变形，小车式起落架的车架的俯仰运动以及弹性变形，对等速滑跑飞机建立了全机运动的微分方程，并以旧金山28-R跑道为地面输入，利用时域积分的方法得到飞机滑跑的各种响应。

This article applies the simplified differential coefficient equation on rising-sinking and swinging movement of high-speed sliding body model in the static water. The paper presents a method of theoretical prediction for the movement of high-speed planning hulls with a constant dead rise angle in regular waves.

应用简化了的高速滑行体模型在静水中滑行的升沉和纵摇运动的微分方程，提供了对不变侧缘角的高速滑行体在规则波浪中运动的动力分析方法。

Because of the static characteristic of the shape-model which can't be expressed by time obviously, it is hard to get characteristics of motion by integral and differential coefficient directly.

在进行运动特性分析时，由于姿态方程本身仅表示某一时刻瞬间的形态特性，没有显式的时间参量，很难通过纯数学的微分与积分方式求解运动特性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐