查询词典 mechanism

The gyroscope is the key device for stabilizing, scanning and tracking in the seeker. The work mechanism of the gyroscope in the seeker is illustrated detailedly through analyzing the PL-2 missile seeker"s structure. The gyroscope electric circuit, including the gyroscope"s driver circuit, the gyro shaft position detecting circuit and the gyroscope"s precessional circuit, was designed according to the gyroscope"s work mechanism.

陀螺是仿真导引头中稳定、搜索和跟踪的关键部件，论文从分析PL-2导弹红外点源导引头的结构和特点出发，对其中的稳定陀螺工作机理进行了详细的研究，并根据陀螺的工作机理，自行研制了一套陀螺电路，包括陀螺驱动电路、陀螺轴位置检测电路和陀螺进动电路，并得到了实验验证，效果良好。

The gyroscope is the key device for stabilizing, scanning and tracking in the seeker. The work mechanism of the gyroscope and especially the precession theory in the seeker is illustrated detailedly through analyzing the PL-2 missile seeker"s structure. The gyroscope electric circuit, including the gyroscope"s rotary circuit,the gyroscope"s precessional circuit and the gyro shaft position detecting circuit, was designed according to the gyroscope"s work mechanism.

陀螺是仿真导引头中稳定、搜索和跟踪的关键部件，论文从分析PL-2导弹红外点源导引头的结构和特点出发，对其中的稳定陀螺工作机理特别是陀螺进动理论进行了详细的研究，并根据陀螺的工作机理，自行研制了一套陀螺电路，包括陀螺旋转电路、陀螺进动电路和陀螺轴位置检测电路，并得到了实验验证，效果良好。

The problem solving and inference functions will be provided by the hardware inference mechanism,the control mechanism,parallel processing,the logic programs developed on these machines and the software system for high-order predicate calculus.

FGCS的功能可分成3类：问题的求解和推理功能、基于知识的管理功能和智能接口功能问题的求解和推理功能将由硬件推理机制、控制机制、并行处理，以及在这些机制上开发的逻辑编程及高阶谓词演算软件系统提供。

Analyzing EU's common foreign and security policy mechanism may provide a definite case for promoting theory of regional political integration. Similarly, undertaking the study can prefigure the political pattern in the future, for whether EU can become a pole consists in whether its common foreign and security policy mechanism will bring real political integration in Europe.

对欧盟共同外交与安全政策机制进行分析，可以为区域政治一体化理论发展提供实例参考；同样，也有利于预见未来国际政治格局的形式，因为欧盟是否能成为国际格局中的一极就在于其共同外交与安全政策机制是否能真正实现欧洲政治一体化。

Design of eccentric rotating conjugate cams paper-transferring mechanism ;2. On the basis of the principle of TYM 750 Die Cutting and Foilstamping Press,the mathematical model for the paper-transferring mechanism was constructed.

根据TYM 750烫印模切机递纸机构的工作原理，构建递纸机构的数学分析模型，按照递纸吸嘴的运动轨迹，求出递纸机构中凸轮从动杆的运动规律，利用反转法得到凸轮的廓线。

The result shows that: with the expansion of teacher education space, the reform and development of Chinese teacher education is much closer or equal to that of the international teacher education. The transitional stage and education reform in China puts forward a new demand for P. E. talents. The innovation as to education object, specification and curriculum arrangement raised in P. E. Curriculum Arrangement for Chinese Universities with four-year Program published in 2003 meets such a demand, and narrows the gap of education development in high P. E. academy between China and foreign countries. P. E. teachers abroad are usually cultivated by comprehensive universities, the cultivating objectives are verified, and generalists adapted to social development are emphasized. Cultivating mode abroad are various, with "open-type" or "non-directional type" as the main mode, and 4-year program, 5-year program, and 3-year program serve as the main form of education system. Curriculum arrangement abroad stresses general education, with foundationalization, normalization, objectification, optionalization, miniaturization, internationalization and syntheticalization as its characteristics and it employs credit system. The close-typed cultivating mode of P. E. academies in China should be gradually transformed into open-type or multi-type, cultivating generalists instead of specialists, and further constructing a new one with several cultivating types co-existing. Orientation of P.E. teachers in China should follow standard principle, coordination principle, experience principle and resource principle. To improve P.E teacher education in China, the following measures can be taken: relevant laws and regulations should be made for orientation; P.E teachers" training organization should be encouraged to participate in orientation; extension and connotation of P.E. teacher education should be expanded; resources should be optimize; systematic P.E. teachers" orientations should be organized;"Life P.E. Teacher Qualification "should be changed; useful-life should be set for P. E. teacher qualification; P.E. teacher qualification should be regularly authenticated; On-job training of P. E. teachers abroad tends to be systematic, but in China P.E. teachers" on-job training and prevocational training are separated; therefore measures must be taken to change this circumstance and thus speed up the systematic process. Factors concerning constructing a new system of P. E teachers are the following: reconstructing resources, making P.E. teachers" cultivation, orientation and training systematic, establishing a mechanism for encouragement and punishment, making school-based training and college training systematic, and setting up a mechanism combining directional training with non-directional training.

研究结果表明：随着教师教育革新空间的拓展，我国体育教师教育的改革与发展水平逐步与国际体育教师教育发展趋于接轨化。2003年颁布的《全国普通高校体育教育本科专业课程方案》在培养目标和规格、课程设置上的创新性，适应了我国社会转型和教育改革对体育教育专业人才的需求，进一步缩小了与国外高等体育院系教育发展的差距；国外体育教师一般由综合性大学或文理多科性大学培养，培养目标多向化，以培养适应社会发展的通才型人才为主；培养模式灵活多样，多数以"开放型"或"非定向型"培养模式为主，学制多以4年制、5年制、3年为主；课程设置上注重通识教育，突出基础化、师范化、针对化、选修化、小型化、国际化和综合化特点，实行完全学分制的教育管理制度；我国普通高校体育教育本科专业人才培养模式应该由封闭性转向开放式混合型的人才培养模式转变，由专才型转向复合型人才培养模式转变，构建多种类型并存的人才培养模式；我国体育教师入职教育革新应遵循的原则是本位原则、协同原则、经验原则和时间与资源原则，改进措施有：做好入职教育的法规化、制度化建设，激励体育师资培育机构参与体育教师的入职教育，拓展体育教师教育的外延和内涵，优化整合资源，系统组织体育教师的入职教育，改变体育教师资格"终身制"，设定体育教师资格有效期限，推行教师资格定期认证制度等；国际上体育教师在职培训体系显现了体育教师教育一体化的发展取向，但我国体育教师的在职培训与职前培养存在分离性，必须采取改革措施，加速我国体育教师教育的一体化进程；构建体育教师教育新体系的实施要素是：重组资源配置，实现体育教师培养、入职和培训一体化，建立奖惩机制，实现校本与院校培训一体化，建立体育教师定向与非定向培养培训有机结合机制。

Based on the analysis of application of numerical control worktable, the design requirements for a virtual axis NC worktable are presented. A new three-translation and one-rotation 4-DOF parallel robot mechanism is constructed according to the design requirements and it acts as the primary mechanism of the virtual axis worktable.

在数控工作台应用分析的基础上，提出虚拟轴数控工作台的设计要求，构造一种新型3平移1转动的4自由度并联机器人机构，并将其作为虚拟轴工作台本体机构。

This issue discussed the mechanism of CGA-column flotation, and discussed the separation course of cyclone-static microbubble column, it concluded that the principle of flotation colurmn、 the principle and course of selfinduction、 pipe flotation and mineralization of microfoams、 the liquid state of column separation stage、 the principle of cyclone stage dynamics separation and strengthen the mechanism of cycle recovery of column.

本文对CGA-柱浮选的机理进行了探讨，论述了旋流静态微泡浮选柱的分离过程，包括浮选柱工作原理、自吸式充气原理与过程、管浮选与气泡的矿化、柱分离段的流体状态、旋流段力场分离原理和浮选柱的强化回收机制。

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。

The first, economic environment before economic upswing is different; the second, initial impetus of economic pullulation is different; thethird, conduction mechanism of economic pullulation is different; the fourth, the action of bank on economic grow this different; the fifth, pushing mechanism of fixed assets investment in creasing is also different.

一是经济高涨前的经济环境不同；二是经济成长的初始推动力不同；三是经济成长的传导机制不同；四是银行在经济增长中所起的作用不同；五是固定资产投资增长的推动机制不同。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。