Design of Time Domain Reflectometry for Application of Soil Moisture and Bulk Electrical Conductivity Measurements 便携式土壤电导率测试仪改进设计及实验测试土壤含水率和电导率的时域反射仪系统
As part of his PhD work at the University of Berne ( Switzer-land), he prepared organic crystals and analyzed them with optical and electrical measurements. 作为其在瑞士伯尔尼大学博士工作的一部分,他准备了有机晶体,并利用光学和电子测量手段对其进行分析。
We close this chapter on resistive circuits with a brief introduction to the subject of electrical measurements. 我们结束电阻电路这一章时,简短地介绍一下电气测量问题。
Design of Time Domain Reflectometry for Application of Soil Moisture and Bulk Electrical Conductivity Measurements Numerical simulation of infiltrating water in variably saturated zone 测试土壤含水率和电导率的时域反射仪系统非饱和-饱和土壤中水分入渗的数值仿真模拟
The proposed test method would eliminate the use of photometric measurements in favor of purely electrical measurements with the goal of reducing measurement variation. 拟议的测试方法将删除光度测量,以具有减少测量差异的单一的电气测量取代。
The precipitation behavior of AA 3003 aluminum alloy during annealing as well as its effect on the microstructures of alloys was investigated by means of hardness, electrical resistivity measurements, optical microscopy and transmission electric microscopy. 通过硬度、电阻检测以及光学显微镜、透射电镜观察,研究了AA3003铝合金在退火过程中的析出行为以及对合金显微组织的影响。
Electrical conductivity measurements performed in N2/ H2 over the temperature range of400 to800 ℃ showed that conductivity was enhanced by extrinsic doping. 电化学方法研究表明,合成样品在400~800℃温度范围内具有质子导电特性。
Electrical Conductivity Measurements for Metals under Shock Compression 冲击压缩下金属的电导率测量
From the results of H2-TPR, FT-IR, XPS, in situ electrical conductivity measurements and OPD by TiO2 photocatalyst, the active oxygen species of La-V-O/ TiO2 catalysts in OPD was investigated. 其次,本文结合H2-TPR、FI-IR、XPS、电导结果和光催化条件下TiO2上的丙烷氧化脱氢制丙烯结果,探讨了La-V-O/TiO2催化剂上丙烷氧化脱氢制丙烯反应的活性氧物种。
The thin films undergo tetragonal to cubic and semiconductor to metal transitions with Nb concentrations as shown by the x-ray diffraction, Raman spectroscopy and electrical resistivity measurements. X射线和Raman测量显示薄膜随Nb掺杂量的增加从四方相转变为立方相。同时电学测量表明,薄膜的导电类型从半导体转变为金属。
Consequently it is necessary to develop a multiplexed, synchronous and high-speed measuring instrument to record required voltage and current during electrical measurements. 有必要研制一种可以多路、同步、高速采集电气试验中各个电压和电流需要记录的暂态部分,并能适应现场各种过电压、过电流、强电磁干扰等复杂情况。
Electrical and structural properties of the blends were characterized by means of electrical conductivity measurements, SEM, FT-IR and DSC. 对导电薄膜进行了导电性能测试,扫描电镜(SEM)、红外光谱(FT-IR)及差示扫描量热(DSC)分析。
Isochronal thermal annealing behavior of NTD floating zone silicon grown in the hydrogen ambient ( called NTD FZ ( H) Si) is reported. The dependencies of resistivity and carrier mobility on the annealing temperature are determined by room temperature Hall electrical measurements. 对NTD氢区熔单晶硅进行了不同温度下等时退火,采用Hall电学方法测量了电阻率、迁移率随退火温度的变化规律。
Based on the results of electrical measurements, the relative contribution of the grain interior and grin boundaries to the overall resistance was discussed in detail in relation with the grain boundary effect and Mg doping contents. 根据电学性能测试结果,从晶界效应的角度出发研究了晶粒电导和晶界电导对总电导的贡献,讨论了镁掺杂对晶界电导效应以及离子传输机制的影响。
During measuring electromagnetic distribution and electrical measurements compatible with magnetic measurements, calculating the whole field of a few radiant fields or the whole radiant power density is always needed. 在电磁环境电磁干扰和电磁兼容测量中,经常需要计算几种辐射场的合场强或总的辐射功率密度。
The satisfactory result of the X-ray photography experiment verifies the possibility of its application in high speed photography and electrical measurements while the conventional synchronization methods become invalid. 它可以应用到闪光X射线同步照相、高速摄影、电测等各个领域,在传统的同步方式不能满足实验要求的情况下,获得令人满意的测试结果。
Error analysis for electrical power measurements with non-integer-period sampling 非整周期采样下电功率测量的误差分析
It is a breakthrough to extract key information, which directly reflect fault distance from fathomable electrical measurements with appropriate mathematics tool. 寻找合适的数学工具从可测电气量中提取直接反映故障距离信息是重要的突破点。
Mechanical, electrical properties measurements and microstructures observation on cold drawn and annealed Cu-Al2O3 alloy are conducted. 通过力学性能、电学性能测量和金相、电镜观察对Cu-Al2O3弥散强化铜合金的冷加工及退火后性能和组织的变化进行了系统研究。
, existed in CZT crystals. Through IR, UV, electrical resistivity measurements and etching pits density calculation, it was found that as-grown CZT crystals had high defect density and low electrical resistivity, which make it impossible to be applied to fabricate room-temperature radiation detectors. 通过对晶体红外透过率、紫外&可见光吸收、电阻率测试及腐蚀坑密度计算显示,刚生长的CZT晶体缺陷密度高,电阻率低,难以直接用于制作室温核辐射探测器。
Fatigue damage evaluation and repairing effect prediction by electrical resistance measurements 电阻法检测疲劳损伤及预测修复效果探讨
Results of P-wave velocity ( vP) and electrical conductivity measurements on anorthosite are presented from room temperature to 880C at 1.0 GPa using ultrasonic transmission technique and impedance spectra technique respectively. 在1.0Pa、室温到880℃分别采用超声波透射法和阻抗谱法测量了斜长岩的纵波速度和电导率,并对实验产物进行了鉴定分析。
Secondly, the basic theory on magnetization measurements and electrical transport measurements were systematic introduced. 第二、详细的叙述了脉冲强磁场下磁化测量系统和电输运测量系统的基本原理;研究了磁化测量过程中如何处理在信号传输过程中由于外界的干扰所产生的噪音信号。
The surface active and micellization properties of the alkylbenzene sulfonate Gemini surfactants were investigated by means of surface tension, electrical conductivity and fluorescence measurements. 用表面张力法、电导法以及稳态荧光法研究了烷基苯磺酸盐Gemini表面活性剂的表面活性和胶束化性质。
By electrical transport measurements and temperature-dependent Raman scattering technology, the variations of MIT with the external electric field and its relaxation behavior have been revealed. Thus, an efficient method has been found for manipulating the physics properties by adding external field. 通过结合电学输运测量和变温拉曼散射技术,揭示了该体系中的金属-绝缘体相变随着外加电场的变化及其弛豫特性,建立了外场调控其物理规律的一种有效途径。
The electrical and the optical measurements show that the discharge has intense ionization and produces intense radiation. 实验得到的光学特性与光谱特性表明放电存在强烈的电离,产生强烈的准分子辐射。
Electrical measurements show that N-doped graphene can effectively modulate the electrical properties of graphene. 研究表明通过N元素掺杂能够有效地提高石墨烯的电化学性能。
It analyzes the development of electrical conductivity measurements method at home and abroad, it studied the three main factors affecting the electrical conductivity measurement and an electrical conductivity measurement method based on the variable frequency excitation was proposed. 文中分析了电导率测量的国内外发展状况以及常见的测量方法。研究了电导率测量的三个主要影响因素,提出了基于变频激励的电导率测量方法。