查询词典 motion study

This paper is proposed to study the relationship between external force and contractive velocity on muscle contraction and to study the directed motion and the energy conversional efficiency of myosin.

本文拟对肌肉收缩过程中的力与速度关系、肌球蛋白定向运动的能量转换效率问题进行理论研究。

The study of motion characteristics,electromagnetic characteristics and oscillation characteristics of electrical particles are key composition of the EDM mechanism study.

电火花加工机理研究的相对滞后在一定程度上制约了电火花加工技术的进一步发展；放电通道中带电粒子的运动特性、电磁特性及振荡性的研究是电火花加工机理研究中的重要组成部分。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

This paper focuses on the study of launch dynamics for self-propelled artillery. In order to exactly compute the motion of projectile in gun tube and the initial disturbance, the theory of two- phase flow interior ballistic is applied to the study on launch dynamics.

为了更加准确地计算火炮弹丸的起始扰动，将两相流内弹道应用于发射动力学研究。

It can be divided into statics , the study of equilibrium, and dynamics, the study of motion caused by forces.

它可以分为静力学和动力学，前者研究平衡状态，后者研究力造成的运动。。

Firstly, the study of education policies focused on the basic education revolution, school programs, textbooks, and how "A reverse course", which was in the late occupation period, affected education policies change. Secondly, the study of culture policies analyzed theatricals, motion picture censorship and the revolution of religions.

教育政策的研究主要将重点摆在基本教育改革、教科课程、教科书、占领后期「逆反路线」所导致之教育政策转变等；文化政策方面则探讨媒体中对战后日本影响至为深远的演剧、电影检阅及最富争议的宗教改革。

One type of students are those who are short of study motion. This type of students can be divided into four situation. That is the contradiction between demands and realities, the repound after pressure, they have ever been defeated, they negate the value of study, Another type of students are those whose knowledge is not enough. Their previous knowledge can't catch up with the teaching demands of a vocational school. The third type of students are those who have no suitable study methods and good learning habits. The fourth type of students are the synthesis of all above.

其次从学生主观角度分析，其化学学习障碍产生的原因可分为四种类型：一是学习动力不足，这类学生又可大致分为四种情况，即需求的倒错、压力的反弹、心理曾经受挫和否定学习的价值；二是先备知识不足，表现在其先备知识与中专教学要求的不相称上；三是学习方法和习惯不好；四是综合体现上述三种原因。

Work Study involving the use of Method Study, Time Study and Motion Analysis techniques to reduce waste in our work

提高生产效益并减少浪费。1。通过工作研究中的方法研究、时间研究和动作分析，降低工作中的浪费

Vc used to achieve the motion detection system for the study of motion detection direction reference to a friend!

用vc++实现的运动检测系统，供对研究运动检测方向的朋友参考！

In the end of this paper, a conclusion of the study on DSP-based motion controller is given, and the prospect of motion controller is presented.

最后，作者对本文的研究内容进行了总结，并对运动控制器的发展作了展望。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。