查询词典 mechanical device

Hydraulic cylinder will be able to provide the hydraulic-mechanical energy conversion device called actuators.

将液压缸提供的液压能重新转换成机械能的装置称为执行元件。

The lifetime prediction with increases in switch cycles is strongly dependent upon the device dimensions and characteristics of structural thin films. Thus, understanding of fundamental observed failure mechanism and mechanical response respected to external loads plays an important role in products design and lifetime prediction of MEMS.

因材料的疲劳行为发生时并无任何明显的外观改变，而是一种潜在的行为，且没有明显的塑性变形区，对元件的安全以及寿命的影响更是无法明显观察并加以预防，因此可藉由疲劳试验来预测元件之寿命，并进一步对元件进行防范和更替的动作。

This paper emphasized discussing safety-related control method and application device. The following several parts are the main content of this paper: 1、 Discussed the advantages and disadvantages of two kinds of Brake-by-Wire System, and chose Electro-Mechanical Brake system as research object. Established redundant disposure of hardware in Brake-by-Wire system.

本文着重讨论了线控制动系统与安全相关的控制方法和装置，其内容主要包括以下几个部分： 1、讨论了两种不同类型线控制动系统的优缺点，并选择电子机械式制动系统为研究对象，制定了线控制动系统的硬件冗余布置方案。

Based on the analysis of the key components of disc ditcher, the maximum lift height of the rotary blade shaft and the minimum size of the elevating device as the objective functions were introduced to establish a nonlinear mathematical model satisfiable to multiple constraint conditions of mechanical structure and agronomic demands.

为了解决圆盘开沟机在下地、过梗、爬坡过程中出现的旋耕刀易破损、刀盘支架易变形等问题，通过对其关键部件的分析研究，以刀盘轴最大提升高度和升降装置最小尺寸为目标函数建立数学模型；用Matlab软件对其结构尺寸进行参数优化。

Five novel torsion-mirror optical actuators including double-beam thickness differential structure with single torsional axis, double flexible folded-beam structure with single torsional axis, double-beam vertical torsion comb structure with single torsion axis, four-beam differential compound-micromirror structure with double torsional axis and the combined structure of the four basis forms above, are brought forward. All of these devices could be fabricated by the same silicon micromachining process we have developed. The deformation compensation design with local enhancement for the thin torsional beam which is the key structure of these devices is also put forward to improve the reliability. The three-dimension solid model and two-dimension reduced order model of the torsion-mirror optical actuator are established and then the numerical simulations for evaluating the device characteristics of the statics, dynamics, electrostatic field, mechanical and electrostatic coupling, fluid and solid coupling are carried out to optimize the structure design. Furthermore, three optical fibre clamping structures which could be integrated monolithicly are designed and analyzed to improve the optical coupling capability. 4. Three flexible process flows combined with bulk silicon micromachining and surface silicon micromachining are brought forward to fabricate these novel single-crystal silicon or polysilicon torsion-mirror optical actuators by using the same lithography masks for both SOI wafer and regular silicon wafer. A series of important process experiments are carried out to optimize the process parameters and the process flows. Some novel and typical process phenomena which occurred during the microfabrication are analyzed and then the corresponding solutions are put forward. 5. A MEMS dynamic testing system which exploit blur image synthetic technique, stroboscopic image matching technique, stroboscopic mirau microscopic interferometry technique and microscopic laser dopper vibrometer technique is set up to measure three-dimension and six-freedom micro motions of any MEMS devices with nanometer resolution.

在对硅微机械扭转镜光致动器的光机电特性系统地理论研究的基础上提出了硅微机械扭转镜光致动器的结构设计准则。3、提出了单轴双梁厚度差分结构、单轴双柔性折叠梁结构、单轴双梁垂直扭转梳齿结构、双轴四梁差动复合微镜结构以及以上四种基本结构组合后的衍生结构等五种工艺加工技术兼容的新型的硅微机械扭转镜光致动器，对器件关键结构薄厚度、高耐疲劳扭转梁进行了局部加强的变形补偿设计，建立了器件的三维实体模型以及两维降阶模型，对提出的新结构硅微机械扭转镜光致动器进行了系统的静力学、动力学、静电场、力电耦合和流体固体耦合的建模仿真与优化设计，同时设计并分析了三种可实现单芯片集成的弹性光纤定位夹紧结构。4、提出了组合体硅微加工技术与表面硅微加工技术、兼容同一套光刻版图、可分别基于SOI 晶片和普通Si 晶片、适应于制造提出的各种新结构单晶硅和多晶硅硅微机械扭转镜光致动器的三套柔性加工工艺流程，开展了一系列重要工艺步骤的单项工艺试验，对工艺流程与工艺参数进行了优化，针对加工过程中出现的具有普遍意义的典型工艺问题进行了讨论和分析，并提出了解决方法。5、创新性地将模糊图像合成技术、频闪图像匹配技术、频闪Mirau 显微干涉技术与显微激光多普勒测振技术有机结合，建立起了一套周期运动测量与瞬态运动测量相结合、单点运动测量与全视场运动测量相结合、满足不同MEMS 器件各种动态测试要求的集成的MEMS 三维六自由度微运动精密测量系统。

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全国免费服务热线：400 880 2959主营产品：盐雾腐蚀试验箱/二氧化硫试验箱/高温试验箱/低温试验箱/高低温试验箱/高低温湿热试验箱。/高低温交变湿热试验箱/台式恒温恒湿试验箱/恒温恒湿试验箱/精密干燥试验箱/真空干燥箱/高低温冲击试验箱/紫外光加速老化试验机/氙灯耐气候试验箱/换气式老化试验箱/臭氧老化试验箱/防锈油脂湿热试验箱/砂尘试验箱/箱式淋雨试验箱/摆管淋雨试验装置/滴水试验装置/霉菌交变试验箱/盐雾腐蚀试验室/大型高低温步入试验室/恒温恒湿试验室/盐雾恒温恒湿高温复合试验箱/温度老化室/真空紫外老化试验箱/机械式跌落试验台/电脑控制振动台/温湿度振动三综合试验机/温度快速变化试验箱

Based on thermal conduction theory, a thermal model is built up to get the effective thermal content and the effective thermal conductivity to be 1.0×10^(-3) W/K and 8.1 μJ/K, respectively, and the temperature-fluctuation noise is nearly 1.73×10^(-10)W/Hz(superscript 1/2). According to the device operating principle and energy equipartition theory of thermodynamics, the mechanical-thermal noise is 9.96×10^(-9) W/Hz(superscript 1/2), and the background noise is nearly 3.22×10^(-11)W/Hz(superscript 1/2), so that the normalized detectivity is deduced to be 9.03×10^6 cmHz(superscript 1/2)/W.

从理论上建立了器件的基本热模型，推导得到器件的等效热熔和等效热导分别为8.1μJ/K和1.0×10^(-3)W/K，温度噪声约为1.73×10^(-10)W/Hz(上标 1/2)；通过器件的工作机理和能量均分原理，推导得到热机械噪声的等效噪声功率约为9.96×10^(-9)W/Hz(上标 1/2)，器件的背景噪声约为3.22×10^(-11)W/Hz(上标 1/2)，从而得出器件的归一化探测率约为9.03×106cm。

According to the device operating principle and energy equipartition theory of thermodynamics,the mechanical-thermal noise is 9.96×10-9 W/Hz1/2,and the background noise is nearly 3.22×10-11 W/Hz1/2,so that the normalized detectivity is deduced to be 9.03×106 cm·Hz1/2/W.

Hz1/2/W。实验表明，器件的噪声中热机械噪声为主要噪声源，大小主要由浓硼硅薄膜的机械性能和器件结构决定，可以通过增大薄膜厚度，减小薄膜面积，从而增加薄膜的特征频率的方法来减小器件受外界振动的影响，但以降低器件的灵敏度为代价。

However, when controlling for demographic and clinical care variables, year of birth was no longer significantly associated with age at death (HR 1.0, 95% CI 0.6–1.8, p = 0.9), whereas ventilation for more than 16 h/d, use of a mechanical insufflation–exsufflation device, and gastrostomy tube feeding showed a significant effect in reducing the risk of death.

但是，在引入人口统计学变异和卫生资源的差异后，上述不同出生时间段之间死亡年龄的差异不再显著，而使用机械通气每日超过16小时的患者以及采用胃造口术管道进食的患者死亡风险明显下降。

The mechanical transmis-sion is composed of high precision gearwheel and gear bar together with germany made low clearance and peg-free planetary gearwheel reducer. the mechanism is equipped with automatic clearance compensation device, which enables a clearance-free transmission and ensurea teh good performance and precision of the cutting machine.

机械传动采用高精度齿轮齿条及德国原装低隙免键行星齿轮减速器，机械结构增设自动补偿齿隙装置，使之做到无隙传动，保证了切割机良好的使用性能和精确度。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。