查询词典 take by force

Results show that in hover the fuselage normal force and pitching moment are relatively high due to the influence of rotor/wing downwash; and in low speed forward flight, the downwash have strong interaction on the normal force and pitching moment of fuselage due to the big dimension horizontal tail; the effects of downwash on the fuselage rolling and yawing moments are little and the influence on fuselage side force is considerable.

结果表明，悬停时受主机翼高速旋转产生的下洗尾流影响，机身产生了较大的法向力和低头力矩；前飞时下洗尾流对机身的法向力和俯仰力矩有比较严重的干扰，对滚转力矩和偏航力矩干扰较小，对侧向力有一定影响。

Force reflection servo and force symmetry bilateral servo control strategies were individually tested on the master-slave system to study the tele-operated force feedback bilateral servo control.

验证了本设计的主操作手结构的合理性，力对称型双向伺服控制策略具有较好的控制性能。

Liu studied in Voroshilov Naval Academy in Leningrad, Soviet Union between 1954 and 1958, and became the driving force behind the transforming of the PLA Navy from a costal defence force to a regional naval force during his tenure.

在刘担任中央军事委员会副主席期间(198/9-1997)，他成为将中国海军从一支鸡肋般的弱小近海防御力量发展为具有战略威慑力的强大的海上力量的强大的幕后推动者之一。

Liu studied in Voroshilov Naval Academy in Leningrad, Soviet Union between 1954 and 1958, and became the driving force behind the transforming of the PLA Navy from a costal defence force to a regional naval force during his tenure.

中国得到的仅仅是伤痕累累的船壳，连自身动力也没有。唯一可以借鉴的便是它的斜向跑道甲板以及现代航母的构造）。HMAS&墨尔本&号在中国广州的一个军用海港泊置了5年后被拆除。

China's ambition to build a 'blue-water' navy comprising aircraft carriers, large surface combatants and nuclear submarines can be traced back to the late 1950s, but the building of an aircraft carrier was not seriously considered until the early 1980s, when Admiral Liu Hua-Qing became the commander in chief of the PLA Navy, and later in the 1990s the vice chairman of the Central Military Commission (1989-97). Liu studied in Voroshilov Naval Academy in Leningrad, Soviet Union between 1954 and 1958, and became the driving force behind the transforming of the PLA Navy from a costal defence force to a regional naval force during his tenure.

中国建立由航空母舰、大型水面舰艇和核潜艇组成的&蓝水海军&的雄心可追溯到上个世纪50年代后期，但直到上世纪80年代初期航母建造问题才得到了认真考虑，当时刘华清上将任中国海军总司令，后来其升任中央军委副主席(1989-97)。1954－1958年，刘华清曾在前苏联伏罗希洛夫海军学院学习，其在任期间推动了中国海军从进海防御力量到区域海军力量的转变。

The Pakistan Air Force will take delivery of the first eight of 150 new JF-17 (FC-1) fighter aircraft built with Chinese co-operation in 2007 and hopes to have enough experience of flying the aircraft to consider marketing it for overseas customers by 2008, the chief of the Pakistan Air Force, Air Chief Marshal Tanvir -Mehmood Ahmed, has told Jane's.

巴基斯坦空军需交付的新18架JF-17(财-1)战斗机建成具有中国合作，并希望在2007年能有足够的飞行经验，飞机考虑为海外客户推销它。在2008年巴基斯坦空军参谋、上将tanvir-Mehmood一道艾哈迈德告诉詹氏。

SJG of place of ventilated take a breath order of engine of inclined fan drifting type: 2#- 8# wind force: 200 - 25000m3/h total pressure: 54 - 1200Pa characteristic: Use impeller of canister of bosomy form wind, cone-shaped hub, wind pressure tall, wind force big, noise province of report of low, bad news, structure is compact wait for an advantage, horizontal, vertical is installed all but, most apply to straight conduit and pressurization to send a platoon wind, material can use glass reinforced plastics or steel is made, also can make a place with a draught of housetop type, pass in and out can be added set muffle; Application: Industry and civil architectural send a wind the system.

SJG斜流式风机机号：2#－8#风力：200－25000m3/h全压：54－1200Pa特征：使用鼓型风筒、锥型轮毂叶轮，风压高、风力大、噪声低、耗电省、构架拮据等优势，卧式、立式装置都可以，最适用在直通道和加压送排风，材料可用玻璃钢或者钢制造，亦可作成屋子顶式、进岀风口可加设消音器；运用：工业制造业和民用健造的送排风体系。

According to the data of this orgnaization, 1% what although wind-force generated electricity to take global electric power only 2007,supply, but development is rapid, to 2020 wind-force generates electricity will contented world the electric power demand of 12%, this will be calefacient to dominating ......

根据该机构的数据，虽然2007年风力发电仅占全球电力供应的1%，但发展迅速，到2020年风力发电将满足世界12%的电。。。。。。关键词：风力风机中国目前生产国，风机，中国，世界

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。

In order to take the influence of the internal force from translation into consideration, the design of in-plane buckling of unbraced frame s adopted a new second-order elastic method to calculate the structural internal force, e.

为考虑变形对内力的影响，对无支撑框架的平面内稳定计算提出采用假想水平荷载法进行二阶弹性内力分析，以与国际上钢结构设计相接轨。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。