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At last, in our design we use the embedded real time operating system uC/OS-II as the software project base, so we can highly improve both the efficiency and the real-time and stable characteristic of the system. Based on the processes mentioned above accomplished, we can realize the system's preconcerted play function successfully.

在设计中采用嵌入式实时操作系统uC/OS-II作为软件开发平台，既提高了系统软件设计的效率，也有效确保了系统的实时性和稳定性，使得系统最终实现了预定的播放功能。

Louis died in 1972, having accomplished his goal of helping to map out human prehistory.

Louis在1972离开人世，并且完成了帮忙描绘出人类史前史的目标。

First, we accomplished the mathematical model and suitable finite elements of grid notes of the pressure hull, including the model without aperture and model with apertures and other added equipments.

首先，本文完成了德国U209型潜舰压力壳(含未开孔模型与开孔模型)之数值模型与网格，并以此模型测试使用不同尺寸的内肋骨补强下，外壳所承受的应力与变形、挫曲强度的不同，藉此推测该设计条件下，最佳的结构设计。

He does not say how this primal act of creation was accomplished.

他没有说明这一原始行为创造完成。

In this paper, the following topics are covered:(1) Study of the geometry of the raceways.(2) Analyses of the principal curvature of the raceways are also accomplished. In addition, the modification of the raceway is put forward.(3) The contact forces and the reducer efficiency are evaluated.

研究包含以下内容：（1）滚道几何形状的研究；（2）完成了对滚道曲率的分析，进一步提出了对滚道的修形；（3）对接触应力的评估；（4）研究了陶瓷滚珠在密珠摆线减速器中的工作性能。

In this thesis, the geometry of airborne SAR and the basic compensation methods are briefly introduced. The effects of phase error on the imaging are derived, and the principal solution of motion compensation is accomplished finally.

本文首先对机载SAR的几何关系作了描述并推导了运动补偿的基本方法，本文还推导了相位误差对成像质量的影响，从而得到了运动补偿的基本实现方案。

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 this paper,the question of logic function accomplished by data selecter is studied,draw into the method of matrix and probability to preliminary explore of the simplest design of circuit.

本文就利用数据选择器实现逻辑函数的问题进行研究，引入了矩阵和概率的方法，对电路的最简设计作了初步探讨。

A loop was accomplished by joining the end of the paper tape containing the program back to the beginning of the tape.

这个循环是通过把纸带的末尾和包含要返回的纸带开始的部分连接在一起来实现的。

If you think about it, most accomplished people in our culture are entrepreneurs who have taken big risks to net proportionally high rewards.

你可以想一想，在我们的社会里，大部分有成就的人都是冒了很大的风险、并相应地获得高回报的企业家。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。