电阻的

This section details how to make surface and volume resistivity measurements with these test fixtures, as well as the Alternating Polarity and Alternating Voltage techniques for measuring resistivity.

本节详细介绍如何使用这些测试夹具来进行表面电阻率和体电阻率的测量，以及测量电阻率时使用的变换极性和变换电压的技术。

Cased hole formation resistivity logging calculates apparent formation resistivity by measuring slight potential difference on metal casing,its measurement error of the apparent formation resistivity is decided by the measurement error of the potential difference on the casing.

过套管电阻率测井通过测量金属套管上的微小电位差来计算地层视电阻率，套管上电位差的测量误差决定了地层视电阻率的测量误差。

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公司简介北京新宇胜利仪器有限责任公司主要以生产和经营国际，国内先进的检测仪器仪表和设备诊断工具以及介绍先进的测试，测量新技术为经营宗旨。A：消防电气、建筑消防设施检测和公共安全侦检仪器设备B：防雷、避雷装置检测仪器设备、防雷装置安全检测箱C：消防防火监督检测装备、火灾原因调查装备、公安派出所消防警务装备D：防火检查与火灾勘查仪器箱、火灾勘查工具箱、消防产品现场判定检测仪器E：消防工程检测箱、建筑消防设施检测箱、消防电气检测箱F：机场消防防火检查仪器设备、地铁消防安全检测箱G：锅炉、压力容器和特种设备、电梯检测仪器H：电信电源维检仪器箱、机械状态巡检箱I：交通安全检测箱、交通事故勘查箱、物业管理检测箱J：公共卫生环境检测箱、食品安全现场检测箱、职业健康监护现场检测箱、放射防护现场检测箱、卫生消毒状况检测箱、健康品生产现场监检箱K：超声波泄漏检测仪、超声波频谱分析仪、超声波全功能故障检测系统L：消防用红外热像仪、工业用红外热像仪、本安型红外热像仪M：节能监督检测仪器仪表工具N ：自有产品：3 1/2-8 1/2位手持/台式数字多用表，交、直流钳形高低、压电流表，温度仪表，转速表，数字兆欧表，接地电阻测试仪，台式多用表，数字智能频率计，数字合成/函数信号发生器，台式数字电桥，示波器，红外测温仪，测振仪，数字直流稳压电源，5 1/2位手持式多功能现场过程仪表校验仪。O：代理产品：，红外测温仪，红外热像仪，超声波全功能故障泄漏/放电侦测仪，可燃/有毒气体检测仪，电力质量谐波分析仪，便携式超声波流量计，绝缘/接地电阻测试仪，温度、电流/电压、过程信号、热电阻/热电偶、压力、回路校验仪等电子、通讯、电力、石油化工、安全检查、钢冶、公共环保、消防特勤侦检救援、消防检测设备、特种设备检测、军事领域的专用仪器监测设备与工具。

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。

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。

The relationship of the electrical resistivity with various parameters and unconfined compression strength is studied using the resistivity method.

结果表明，受H2SO4侵蚀后，水泥土电阻率、孔隙水电阻率、水泥土抗压强度均随着溶液浓度的增加而减小，而水泥土的结构因子和重度均随着溶液浓度的增加而增加，水泥土抗压强度与水泥土电阻率成正比。

The results show that some transitions occur in a low-temperature zone near the melting point.

文章通过电阻率法对InSn49.1和InSn70合金熔体在升温过程中的电阻率进行了测量，结果发现在合金熔点附近的低温区域电阻率有异常的表现。

Furthermore, it was found that, when the ferromagnetic phase fraction is above the percolative threshold, the metal-insulator transition temperature increases, the resistivity decreases, but no obvious changes appears in the magnetoresistance value with increasing the ferromagnetic phase fraction.

最后，我们研究了两相比例对金属—绝缘体转变温度和磁电阻效应的影响，发现在渗流阈值以上，增加铁磁相含量可以提高金属—绝缘体转变温度，降低系统的电阻率，但对磁电阻数值没有明显的影响。

This paper also make research on the influence of heat treatment technology on the resistance and TCR of different thick film elements including Ag-Pd, bismuth ruthenate and copper ruthenate, and influence of heat deposition technology on the consistency of resistance of the elements.

此外，论文研究了热处理对Ag-Pd、钌酸铋、钌酸铜三种不同材料体系厚膜电阻元件的阻值、电阻温度系数的影响和热存放对电阻元件阻值一致性的影响。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。