完成式的

The system gets two image of one object with two CCD, thus obtains depth from two CCD"s parallax. After investigating the operation spot and discussing with surgeons we use LED as markers, and get the marker"s 3-D position with a non-contact optics orientation method. After calibrating the CCD, processing the image, the system can figure out marker"s areal coordinates, get marker"s 3-D coordinate in dummy world coordinate system, thereby obtain instruments 3-D position and orientation. After the coordinate transformation and a series of orientation calculation, operation navigation comes true.

运用两个摄像机对同一目标从不同位置成像，进而从视差中恢复距离；通过对手术现场的仔细了解与手术医师的反复商榷，使用LED作为标志点，利用非接触式光学定位方法提取空间点位置信息：通过对摄像机的标定、图像处理及目标点重心的计算，求出空间点在虚拟世界坐标系下的三维坐标，从而确定了手术器械等的空间位姿，通过空间坐标转换及一系列定位计算，完成了手术导航实验系统。

According to the point of view of mechatronics, the modeling of the dot-matrix needle printer head has been completed by the method of electromechanics.

本文从机电一体化的观点出发，运用机电动力学方法，完成了计算机的点阵针式打印头的建模，并进行了数值模拟分析，且推导出"L"形打印头的磁路、电路和动力学方程，给出了相应的初始条件和边界条件。

It can change the ratio of the transmission system by adjusting the pushing force of the pulley.By analyzing the structure characteristics and force relations,the design method of an important parameter of the CVT hydraulic system and the rate of transmission ratio,are put forward by simulating to the emblematical driving models.The structure parameters of the hydraulic ...

在分析了金属带式无级变速器的结构特征和力学关系的基础上，通过对汽车典型行驶工况的仿真分析，提出了无级自动变速液压控制系统关键参数—速比变化率的设计方法，完成了液压系统的结构参数设计，并进行了仿真验证，从而为无级自动变速汽车的研制开发奠定了基础。

59B 59B iceoutside His studies of ice-polished rocks in his Alpine homeland, far outside the range of presentpresent-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in whick great ice sheets had existed in now currently temperate areas.

an age + in which / when 时态问题：发生在过去的动作要用一般过去式，不能用过去完成时 now 和 currently 语意重复副词的位置：now 放在系动词，助动词的后面，普通动词的前面，以及动词短语的中间。

This paper analyses and inherits from all these related areas and addresses the following contents: 1 On the aspect of CVGE Concept, this paper discusses the distinguished features of CVGE, including: Agreement on the final goal among all participants, ability of collaborative perception, interactivity with environments, immersible participation, visualization of collaboration process, multi-media communication channels and behavior intelligence.

论文在综述、借鉴前人研究成果的基础上，主要完成了以下内容： 1从概念层次上，提出了CVGE的特征，即用户总体目标的一致性、用户具有协同感知能力、人与虚拟环境的可交互性、可沉浸式参与、可视化的协同工作过程、多种交互交流方式、行为智能性等。

Based on uC/OSII RTOS, every step is achieved such as control module, task PRI assign, real time attempter, double communication disposal and fault diagnosis.

在磁悬浮全数字控制硬件平台上，采用不同的控制软件设计方案：实现前后台的软件设计，给出程序的主要流程；引入C／C++软件框架式编程思想，以uC／OSⅡ嵌入式实时操作系统作为控制软件基础，完成磁悬浮轴承实时控制系统的控制模块的建立、任务的优先级分配以及各种功能的实时调度，双处理通讯和故障诊断等工作。

for carrying out a small physical volume and high reliability of the motor driving and control,by using hip4081 chip and aln hybrid integrated technology,a hybrid integrated technology h bridge circuit based on hip4081 is designed to control bidirectional circumrotation and speed regulation of the motor.by practical application,the bidirectional circumrotation/speed adjustment of motor are realized safely and reliably.the products has a small physical volume,fast heat transmission,high efficiency and can operate properly in severe environment.it can enhance the reliability of the drive circuit and the system,and adapt to both military and commercial usage.

摘 要：为了实现小体积、高可靠的电机驱动与控制，利用hip4081专用芯片和aln厚膜混合集成技术，设计一种基于hip4081的厚膜h桥电机驱动电路，完成了h桥式驱动电路对电机双向转动和调速的控制。经实际应用，该电路不仅安全可靠地实现了电机的双向转动和调速功能，且产品体积小，导热性能好，效率高；还能在恶劣的使用环境下安全工作，提高了驱动电路和系统的可靠性，适合军、民两用。

It makes an all-round research, analysis and study to it with the extinctive theory, planning demand and systemic conservation of FM-200, including the design for automatic alarm systems and some essential claim for safety decentralization and the economy budget for the whole system.

本文根据深圳高阳万国电脑有限公司通讯楼的具体工程概况，采用全淹没式七氟丙烷（FM-200）灭火系统对其进行保护，同时对目前哈龙灭火系统替代产品的灭火性能、使用场所及对环境与人身安全影响进行了分析，对七氟丙烷（FM-200）气体灭火系统的灭火机理、设计要求以及系统维护进行了全面的调查、分析与研究，包括自动报警系统的设计和一些必要的安全疏散要求以及对系统的经济预算，完成了本文设计。

This paper proposes a switched-mode boost DC-DC converter, which doesn't need not only a saw-tooth wave generator but also an error amplifier. By using a comparator and a fixed duty-cycle oscillator, the proposed controller will offer a high DC voltage of 15V to drive the LED backlight driver for Liquid Crystal Display.

中文摘要本论文提出ㄧ种不需锯齿波产生器和误差放大器的架构，其系利用比较器和输出固定责任比的振荡器来替代锯齿波讯号，藉此控制开关的动作，完成升压式直流电压控制晶片，以提供15伏特直流偏压给小尺寸液晶显示器(Liquid Crystal Display， LCD)。

Unloading coal and the going up coal control system to be a public system comparatively huge in the heat and power plant ,its transport course is accomplishing byes way of the leather belt conveyer ,and the whole system carries the longer ribbon conveyer of distance to be gone here and there and come into contact with by many, this kind of leather belt transport plane gets extensively the use in builing productions such as material, chemical industry, foodstuff, machinery, iron and steel, metallurgy and coal mine etc.

摘 要：卸煤及上煤控制系统是热电厂中较为庞大的一个公用系统，它的输送过程是通过皮带输送机来完成，整个系统由多台输送距离较长的带式输送机串接而成。这种皮带运输机在建材、化工、食品、机械、钢铁、冶金、煤矿等生产中得到广泛使用。

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。