电阻

With extreme overloading the resistance path can melt, the component becomes highly resistive or burns

如果电阻极端过载，电阻合金材料将熔化，电阻断路或者烧穿。

The process includes dry etching the protecting layer of AMR film; wet etching the permalloy layer of the AMR film; and dry etching the transition layer of the AMR film.

一种多层膜的干湿结合蚀刻方法，包括：干法刻蚀各向异性磁电阻效应薄膜的保护层；湿法腐蚀各向异性磁电阻效应薄膜的坡莫合金层；干法刻蚀各向异性磁电阻效应薄膜的过渡层。

For the COG joint subjected to thermal storage test at 80 oC for 1000hours, the resistance raises from 0.48 to 1.26Ω while in the sample, the resistance raises from 0.73 to 1.52Ω; all test results fit the reliability requirements. But the reason of increment is not only NCF material degradation cause, but also the bump is elastically. Therefore elastic bump resile caused the resistance to increase after pressing. Consequently I used another two samples which is not thermal aging compared to test samples, the results were show bump resistances increasing about 65%, its come form elastic bumps itself.

COG试片经过80oC约1000小时之后观察电阻上升情形，一片约从0.48Ω上升至1.26Ω另一片从0.73Ω到1.52Ω也符合可靠范围内，但是上升的原因不完全是胶材劣化导致，因为凸块本身具有弹性，所以在压合之后还会回弹造成电阻上升，因此会使用另两片未热时效的试片来比较，得知结果大概65％的电阻上升是来自本身具弹性导致。

The temperature of connection was measured using infra-red thermometer and contact resistance of connection was measured using circuit resistance tester.

介绍两种判断电机电气连接故障的新方法，用红外测温仪测试连接点温度，用回路电阻测试仪对接触点接触电阻进行测试，能直观地反映出接触点温度、接触电阻大小，该方法方便、准确、实用。

This paper analyzes the situation of resistance welding equipment,the difference between home and abroad,and suggests the development of resistance welding machine.

分析了国内外电阻焊设备发展现状和国内电阻焊技术与国外相比较存在的差距，并对我国电阻焊设备的发展提出了建议。

Experimental results demonstrate that when the tensile speed is fast, longitudinal volume electrical resistance decreases with the increasing of the stress, before the rupture the electrical resistance decreases to the most low, the moment the sample rupture, the electrical resistance increases suddenly. when the tensile speed is slow, longitudinal volume electrical resistance decreases with the increasing of the stress during the tensile prophase, before the rupture, the big surging of the electrical resistance occurres.

结果表明，CFRP复合材料在受力过程中，当拉伸速度较快时，试样的体积电阻随应力增加持续降低，在试样断裂前降至最低，但在试样断裂瞬间急剧增加；当拉伸速度较慢时，拉伸前期的电阻随应力增加不断降低，在断裂发生前电阻发生较大幅度的振荡。

Has been pioneering since 2002, has always pursued in good faith for the purpose, produce a series of ceramic winding resistance, resistance of carbon, metal oxide film, fuse resistors, no sense of resistance, such as .2003 years, more aimed at China prosperous electrical market, it is a long time use of household electrical appliances of today, I am the first to introduce the new aluminum shell factory sealed fixed resistors, and my company,"the city of Canton by a certificate of inspection and access to export quality of the authority of the European Union CE certification" It has small size, high-density, non-emotional, power, and the process of professional potting with similar foreign products, when hot and stronger, more heat resistance, humidity, high resistance to earthquake, explosion, etc., look professional design more rapid cooling.

深圳市嘉艺虹曦电子有限公司自2002年创业以来，一向奉行以诚信为宗旨，生产系列陶瓷绕线电阻，碳阻，金属氧化膜，熔断电阻，无感电阻等。2003年，更针对中国繁盛的电器市场，人们长时间使用家电产品的今天，我厂率先推出新型铝壳密封式固定电阻器，我公司并获得"广州市质检所合格证书和获得出口欧盟质量权威CE认证"，它具有体积小，高密度，无感性，功率大，专业的工艺灌封与国外同类产品，遇热更坚固，更耐温，耐潮湿，高抗防震，防爆等优点，外型专业设计更具有散热快。

Using a single pulse solar cell tester with constant light intensity for 5ms, we have studied the performance of conventional crystalline silicon solar cell with low concentrator( 1～10 sun)and cells temperature of 15～110℃at laboratory.

结果表明，室温下常规太阳电池的最佳工作点电压V_m和光功率放大系数a随入射光强增加呈现先增后降的趋势，并且串联电阻小的电池下降速度慢，串联电阻大的电池下降速度快；温度对晶体硅太阳电池的工作电压和输出功率相当敏感；在严格控制太阳电池工作温度的条件下，串联电阻小的电池在较宽的聚光范围内可以获得良好的使用效果。

In order to overcome the disadvantage of volume effect and improve prospecting precision of MT, the paper puts forward a multi-channel telemetry method of stratum resistivity for linearity processing exploring depth and electromagnetic frequency in the local area, which creates a crresponding relationship between stratum resistivity and sounding line, and a multi-channel observation system is designed accordingly to explore the resistivity of underground ledge.

为克服大地电磁勘探中"体积效应"的缺点，提高探测精度，提出多道遥测地层电阻率法，该方法是在一个局部区域内，将勘探深度和电磁波周期进行线性化处理，使得地层电阻率和测深曲线建立对应关系，并据此设计了一个多道探测地下矿层电阻率的观测系统。

In this thesis, three major achievements were made in theoretical study: conditions and rules for preparing nano-powders by chemical precipitation are analyzed from the point of view of thermodynamics and kinetics, the principle, standards and experimental method for the aqueous dispersion of nano-scaled metal oxide powders were proposed and verified, mathematical model of nano-filming addition of dopants by chemical coprecipitation was established. In experimental research, nm-ZnO, nm-Bi〓O〓, nm-Co〓O〓 and nm-MnO powder with spherical shape, narrow particle size distribution and small particle size were prepared successfully, highly stable and dispersive aqueous suspensoid of nm-ZnO, nm-TiO〓, nm-Co〓O〓 and nm-MnO powder were prepared successfully and surface modification on these nano-powders was also achieved, 0-3 nanocomposite ZnO varistors with nm-ZnO, nm-TiO〓and nm-MnO respectively were prepared successfully by conventional mechanical attrition, and exhibited much better electrical properties than those of conventional varistors.

综上所述，本文在理论研究方面取得了三项成果：（1）从热力学和动力学角度推导并分析了液相化学沉淀法制备纳米粉体的反应条件和规律，（2）提出了纳米氧化物的水分散体系的设计原理、规范和通用实验步骤，（3）提出了共沉淀的数学模型和计算方法；在实验方面所取得的成果有：（1）成功制备了粒度小、分布窄、形貌对称的纳米氧化锌、纳米氧化铋、纳米氧化钴和纳米氧化亚锰，（2）成功地制备了纳米氧化锌、纳米二氧化钛、纳米氧化钴和纳米氧化锰的高稳定分散悬浮液并实现了干粉体的表面改性，（3）成功地进行了纳米氧化锌、纳米二氧化钛和纳米氧化锰对压敏电阻的0—3复合掺杂实验，试样性能远优于常规压敏电阻，为实现压敏电阻的高能高压化提供了新的方法和思路。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。