查询词典 backward motion

It is shown that two-component Wadati-Konno-Ichikawa equation, i.e. a generalization of the wellknown WKI equation is obtained from the motion of space curves in Euclidean geometry, and it is exactly a system for the graph of the curves when the curve motion is governed by the two-component modified Korteweg-de Vries flow. At the same time, a n-component generalization to the WKI equation is obtained. Also, starting from the motion of curves, mKdV and its symmetry recursion operator is exhibited explicitly; two- and n-component mKdV systems are obtained. It is shown that WKI systems are gauge equivalent to mKdV systems. The two-component WKI equation admits an infinity number of conservation laws and a recursion formula for the conserved densities is given by considering an eigenvalue problem together with introducing an appropriate transformation.

在二维和三维欧氏空间上，我们从空间曲线运动出发，推导出了mKdV方程以及它的用以生成高阶对称的递归算子；推导出了多元mKdV方程以及二元和多元WKI方程，并证明了WKI系统和mKdV系统的规范等价性；尔后，通过考虑特征值问题，并引入一个恰当变换，给出了二元WKI方程的用以计算无穷多守恒密度的递归公式，从而证明了二元WKI方程的守恒可积性；系统地分析了两种mKdV方程的Painleve性质，并分别给出了两种不同形式的二元和n元mKdV方程的共振点出现的规律。

Capital accumulates the motion curve that is market economy, unemployed population is the inevitable result that capital accumulates, the work population motion curve that also is market economy at the same time; Allocate be market economy to allocate the rule by element function, polarization of the rich and the poor is the inevitable result that allocates regular action by element; Inflation is the motion curve of market price case and money.

资本积累是市场经济的运动规律，失业人口是资本积累的必然产物，同时也是市场经济的劳动人口运动规律；按要素功能分配是市场经济的分配规律，贫富两极分化则是按要素分配规律作用的必然产物；通货膨胀是市场价格和货币的运动规律。

That is mainly because the estimation of rotational motion is quite difficult. On the other hand, current image motion model is nonlinear which is very hard to be solved. Thus linear approximation is often made with the premise that the rotational motion is minor.

目前的稳像技术存在的难点包括：首先对于旋转情况较严重的情况稳定比较困难，这一方面是由于旋转的运动估计比较困难，另一方面在补偿的过程中二维的运动模型是非线性的，求解时需要以旋转情况不严重为假设进行线性近似。

From the established manipulating kinematics equation, the kinematics determinacy of multi-fingered hand manipulation is systemically discussed, and the analytic formulae of joint self-motion and the contact motion caused by the joint self-motion are given.

从得到的运动学方程出发，分析了多指手滚动操作的运动学确定性问题，给出了关节自运动及由其生成的接触点运动的显表达式。

The motion of the fluid flowing through a SKstatic mixer in laminar flow can be resolved into rotary motion and straightline motion, so we can respectively calculate the flow resistance of the two motions.

将流体在静态混合器中作的层流流动分解为直线运动和旋转运动，然后分别计算这两种运动在流管中的流体阻力，并将两者相加后得到SK型静态混合器中液体层流流动时流体阻力的计算式。

Computer micro-vision, Mirau microscopic interferometry, stroboscopic photography and laser Doppler vibrator are integrated into this platform. In-plane and out-of-plane periodic motion characteristics of micro-resonator are measured, and out-of-plane transient motion of micro-mirror is analyzed. In-plane displacement, motion phase and resonance frequency can be measured by integrating computer micro-vision with stroboscopic photography, and the repeatable accuracy of in-plane displacement is 30 nm.

实验结果表明，利用计算机微视觉和频闪成像技术能够实现微结构的平面位移、运动相位及谐振频率等周期运动参量的测试，位移的重复精度为30 nm；利用显微干涉和频闪成像技术可实现微结构的离面位移及表面扭曲等周期运动参量的测试，位移的重复精度为3 nm；激光多普勒测振技术具有在频域上对微结构瞬态运动进行分析的优点，是时域上周期运动测试的重要补充。

The paper analyzed the motion principle of an end-face lapping machine for an optical fibre conneetor,and deduced the expressions for the workpiece′s motion path in relation to its lapping plate and the motion path vise versa,both of which,as shown by Eqs(5) and(6) in the full paper,are trochoid .

推导出工件相对于研磨盘的运动轨迹S1和研磨盘相对于工件的运动轨迹S2的表达式，得出S1、S2均为次摆线，分析了轨迹随相关参数的变化规律。

Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.

并针对系统中的某双稳态电磁阀，使用商用CFD软件FLUENT对其进行内部流场的数值模拟，通过使用不同流体介质，不改变阀门有效出口截面积的情况下，分析得到的三组数据，建立了该电磁阀的静态数学模型；通过编写UDF文件，实现对阀芯运动方程的控制，在阀门做由闭合到开启、开启到闭合运动时，控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动，分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间，从而得到该电磁阀的动态特性。

Healthy volunteers participated 6 experiments that were designed to test the sensory conflict theory of motion sickness, to observe the effect of the outside proprioceptive input on motion sickness and to make sure the influence of motion sickness susceptibility, automatic nerve activity and breed on experimental nausea and vomiting. The results were as follows: 1. Different intensity of visual and vestibular sensory conflict effected the onset of vection and rotation toleration time and the symptoms of nausea and vomiting, the more intensive of confliction, the more quickly onset of vection, the more short rotation toleration time, and the more serious symptoms of nausea and vomiting.

本研究针对上述问题设计了6个实验，以200名健康成年志愿者为被试，以转椅和转鼓作为诱发实验性晕动的装置，采用恶心评定量表、恶心问卷和晕动敏感史量表及自我运动错觉和旋转耐受时间为指标，旨在考察：（1）实验性恶心、呕吐症状的时间变化规律；（2）不同强度感觉冲突、不同体位因素对实验性恶心、呕吐的影响，验证晕动的理论假设；（3）晕动敏感史差异、人格因素、种族因素与实验性恶心、呕吐的关系。

The Chinese machines converted rotary motion into longitudinal motion, because they started with the water-wheel, whereas the European machines converted longitudinal into circular motion, but in all other respects they were identical.

中国机械把圆周运动转换成直线运动，因为一开始使用的就是水轮；反过来，欧洲机械则把直线运动转换成圆周运动；两者在其余各方面基本上完全一样。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。