搜索结果: 1-14 共查到“工学 electrical conductivity”相关记录14条 . 查询时间(0.219 秒)
Evaluations of the effects of soil properties and electrical conductivity on the water content reflectometer calibration for landfill cover soils
soil electrical conductivity soil index properties time domain reflectometry volumetric water content WCR calibration
2016/8/2
This study presents soil-moisture calibrations using low-frequency (15–40 MHz) time domain reflectometry (TDR) probe, referred to as water content reflectometer (WCR), for measuring the volumetric wat...
面向车载式测量的土壤含水量与电导率复合传感器设计（On-the-go Measurement Oriented Combined Sensor Design for Soil Moisture Content and Electrical Conductivity）
复合传感器 土壤含水量 土壤电导率
2010/12/28
基于介电方法设计了符合车载测量要求的四环电极结构土壤含水量与电导率复合传感器。分别在NaCl电导率溶液、含水土样和混合土样中进行标定试验分析，结果证实了复合传感器的可行性。通过分析混合土样中含水量和电导率与传感器输出信号之间的相关性，分别建立土壤含水量与电导率的统计预测模型。
测试土壤含水率和电导率的时域反射仪系统（Design of Time Domain Reflectometry for Application of Soil Moisture and Bulk Electrical Conductivity Measurements）
土壤 含水率 电导率 相对介电常数
2009/8/11
研究了用于土壤参数测试的时域反射仪（TDR）系统原理与电路实现方法。根据系统设计要求设计出时域反射仪样机，该样机脉冲发生电路产生140ps上升沿的时域脉冲，接收电路等效采样精度为8.69ps，并设计了时域反射仪系统控制程序，给出了程序的系统控制和数据处理流程图。利用研制的TDR样机对两种土壤样本的相对介电常数进行了测试，反演了土壤样品的体积含水率，同时利用采集波形反演计算出不同湿度土壤样品的体积含...
农田土壤pH值和电导率采集仪设计与试验（Design and Experiment on the Field Information pH Value and Electrical Conductivity Acquisition Instrument）
土壤 pH值 电导率 采集仪
2009/8/11
设计开发了测量pH值和电导率的农田信息采集仪。在探讨该仪器测量原理和软硬件设计的基础上，分别采用两点校正法和配比KCl溶液法对采集仪的pH值和电导率测量进行了标定试验，并在一块黄豆田间隔14m×14m进行土壤采样，共采土样15个，对标定方程进行了验证试验。结果表明，土壤pH值标定结果和准确值的相对误差小于1%，土壤电导率相对误差小于14%；土壤pH值标定结果和准确值线性回归模型检验显著性概率为0....
Linear Regression Model of the Ash Mass Fraction and Electrical Conductivity for Slovenian Honey
honey ash electrical conductivity
2009/2/19
Mass fraction of ash is a quality criterion for determining the botanical origin of honey. At present, this parameter is generally being replaced by the measurement of electrical conductivity (κ). The...
The Effects of Early Antibiotic Treatment Following Diagnosis of Mastitis Detected by a Change in the Electrical Conductivity of Milk
Staphylococcus aureus Streptococcus uberis intramammary treatment somatic cell count
2008/7/15
Mastitis was induced experimentally by infusion of Streptococcus uberis or Staphylococcus aureus into the mammary glands of lactating dairy cows. Clinical mastitis was identified when clots appeared i...
Electrical Conductivity Changes in Milk Caused by Acidification: Determining Factors
milk conductivity acidification buffer system
2008/3/22
Electrical conductivity of milk is mainly due to its soluble salt fraction. Lactose does not conduct current, and fat decreases conductivity. The contribution of proteins and peptides is of minor impo...
The analysis of the relationship between the electrical conductivity values and the valued soil-ecological units values
soil EC soil classification soil variabilty
2014/2/27
This article describes the results of the analysis of correlation between the soil electrical conductivity and BPEJ (valued soil-ecological units). The measurements were made in 2006 at the School Agr...
Electrical conductivity of doped porous glasses as possible sensors for oxygen
Rubpy complex porous glasses
2011/5/5
We are proposing Rubpy complex incorporated in a number of porous sol–gel thin films as a sensor for oxygen. The principle is based on the following fact: triplet oxygen reacts with the excited states...
Microstructural and electrical conductivity properties of cubic zirconia doped with various amount of titania
Ceramics Electrical properties Cubic zirconia
2010/2/9
Purpose: A dopant concentration higher than the optimum may reduce the number of mobile oxygen ions because of defect association causing conductivity degredation. In this study, the effect of TiO2 ad...
期刊信息
篇名
Grain Size-Dependent Electrical Conductivity in Scandia-Stabilized ZirconiaPrepared by A Mild Urea-Based Hydrothermal Method
语种
英文
撰写或编译
撰写
作者
Gang Xu,Ya-Wen Zhang*,Chun-Sheng Liao,Chun-Hua Ya...
Effect of V2O5 Dopant on the Electrical Conductivity of RuO2 Thick Film Resistors
V2O5 Dopant RuO2 Thick Film Resistors solid state reaction
2010/12/21
Thick film glaze resistors have been prepared using V2O5 doped RuO2 conducting phase. Different amounts of V2O5 were incorporated into RuO2lattice by solid state reaction. Sheet resistivity decreased ...
Electrical Conductivity of Thin Wires
Electrical Conductivity Thin Wires a circular cross-section
2010/12/21
An expression for the electrical conductivity of thin metal wires of a circular cross-section has been derived taking account of conduction-electron scattering at grain boundaries and the wire surface...
Generalized Theory of Electrical Conductivity and Current Noise for Discontinuous Metal Films Over a Wide Range of Temperatures
Electrical Conductivity Current Noise Discontinuous Metal Films
2011/1/21
A complete discussion with an extension to the high temperature range of the main results of a recent theory1 on the electrical conduction and current noise in discontinuous metal films is given. In t...