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Aiming at the frequent occurrence of drill-string fracture during gas drilling in the Puguang gas field, this paper, based on the statistical analysis of accidents on fields, makes in-depth investigation into the origins of drill-string accidents in aspects of peculiar drilling medium, different rock-breaking methods, and the vibration of drill string during the drilling process. Through macro, micro and material analysis of the fracture surface of drill string, the law of drill-string failure due to fracture is discovered and the fatigue fracture is found out to be the main type of drill-string fracture.

针对普光气田气体钻井过程中存在的钻具断裂频繁的问题，在对现场事故统计分析的基础上，从特殊的钻井介质、不同的破岩方式以及钻井过程中钻柱共振等方面定性分析了钻具断裂的原因；通过对钻具断口宏观、微观及材质分析，找到了钻具断裂失效的规律和主要形式－疲劳断裂。

According to the structural design of micro engines without ring and pin, the dynamic model describing piston secondary motion is developed, the simulation of piston continue trajectory is finished and the effect of working parameters under ideal condition is studied too.

微小型活塞式发动机是目前最合适的动力源，但理论研究尚未涉及。论文重点发展柱塞横向运动的建模与仿真技术，并从摩擦学的角度对微小型发动机的设计问题作理论探讨。

Created by specialists Oak ridge micro-Energy prototype of the power source remained operable at a very high temperature - 170 C. by the guarantee of success it became the correctly selected combination of materials anode and cathode battery.

建立由专家橡树岭微能源的原型的动力源仍然是可操作性，是在一个非常高的温度-1 70长由成功的保证，成为正确选定组合的材料的阳极和阴极的电池。

The porous ZnO nano ribbon-shaped material of the invention has large specific surface area and is expected to acquire critical application in the fields of the microelectronics, the micro electronic photoelectric devices, the sensors, etc.

本发明的多孔ZnO纳米带状材料比表面积大，有望在微电子和微电子光电器件、传感器等领域获得重要应用。

Infrared radiation resonance by the way that fat cells do resonance massage, soften fat and produce micro-heat, promoting blood circulation, and can activate skeletal muscle and promote body metabolism; rich negative ions as the body immersed in the forest, so you reborn; skin beauty , the deep pore cleansing, and may strengthen the deep penetration of marine products absorption, whitening, moisturizing, increasing skin elasticity and prevent wrinkles and so the effect; Body connection, open the skin pores and heating the body functions, to promote the body metabolism .

红外线由放射共振方式使脂肪细胞做共振按摩，软化脂肪与产生微热，促进血液循环，并能活化肌肉骨骼，促进全身新陈代谢；丰富的负离子就像全身浸在森林中，让你脱胎换骨；美肤方面，深入清洁毛孔，并可强化对海洋性产品的深层渗透吸收，达到美白、保湿、增加皮肤弹性与防止皱纹等之功效；美体方面，打开肌肤毛孔及加热身体功能，使其促进身体新陈代谢。

In term of the relation between the micro-size and cavity resonance sound absorber, the structure is formed through the gas former techniques.

按照空腔共振结构的微观尺寸对吸声影响的机理，采用发气技术形成这种结构并研制出相应的新型发气剂X。

We equaled the meshwork of micro channels to the resistance using the equivalent method of ion-solution and resistance. And coupling with the character of the two-dimensional separation solution and the laminar flow, we established a integrated equation of the electricity account and programmed with the software Matlab. And then we found the direction of the EOF and the range of the power control.

该方法采用离子溶液-电阻等效法，将芯片上的微通道网络等效为电阻网络，再利用基尔霍夫定律，结合MEKC-CZE二维分离时的溶液流向特点以及液流的层流特性，提出了一套完整的电流计算方程，并用Matlab软件进行编程，得到了各个阶段的电渗流的方向以及控制电压的范围。

In the present invention, platinum-carbon catalyst, perfluoro sulfonic acid resin solution and absolute ethyl alcohol are uniformly mixed under ultrasonic conditions; mixture is uniformly smeared on a micro-porous layer of carbon cloth or carbon paper in a brushing or printing method, and a traditional Pt/C gas porous electrode is obtained after drying; silicon oil is adopted to infiltrate into pores of a catalyst layer and a diffusion layer of the traditional Pt/C gas porous electrode, and then the ordering anti-drowning gas porous electrode is obtained after drying.

本发明是将铂碳催化剂、全氟磺酸树脂溶液和无水乙醇在超声波条件下混合均匀，采用涂刷或印制的方法将混合物均匀涂布到碳布或碳纸的微孔层上，干燥后制得传统Pt/C气体多孔电极；然后将硅油渗入到传统Pt/C气体多孔电极的催化层和扩散层孔隙中，干燥后制得有序化抗溺水气体多孔电极。

The development of new micro-analytical techniques, especially the synchrotron XRF, PIXE, LAM-ICP-MS, enables us to measure the concentrations of ore metals in fluid inclusions directly.

随着现代分析技术的发展，特别是同步加速器-XRF、PIXE、LAM-ICP-MS等的出现，使得我们可以直接测定流体包裹体的微量元素组成，取得了富气相的流体包体中Au、Cu、Mo等元素的含量显著的高于液相包体的重要发现。

Based on the equations, the position and attitude of micro flying robot with flapping wings can be controlled.For the rigid structure wing, a double rocker mechanism typical of two DOFs is designed, which is actuated by two PZTs. The mechanism can actuate the rigid wing to realize two DOFs movements. This mechanism has many characteristics, simple instructure, light in weight, reliable in movement, large in range, easy in drive and convenience in control.

设计了一个采用压电双晶片驱动的两自由度的双摇杆拍翅机构，该机构可以驱动刚性翅实现两自由度的拍翅运动，具有：结构简单、重量轻、动作可靠、拍动幅度大、驱动容易和控制方便等特点，适用于微型拍翅式飞行机器人的拍翅系统。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"