| 冻土介电常数的实验研究 |
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| 引用本文： | 李丽英,张立新,赵少杰.冻土介电常数的实验研究[J].北京师范大学学报(自然科学版),2007,43(3):241-244. |
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| 作者姓名： | 李丽英 张立新 赵少杰 |
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| 作者单位： | 北京师范大学地理学与遥感科学学院,遥感科学国家重点实验室,环境遥感与数字城市北京市重点实验室,100875,北京;北京师范大学地理学与遥感科学学院,遥感科学国家重点实验室,环境遥感与数字城市北京市重点实验室,100875,北京;北京师范大学地理学与遥感科学学院,遥感科学国家重点实验室,环境遥感与数字城市北京市重点实验室,100875,北京 |
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| 基金项目： | 教育部长江学者和创新团队发展计划 |
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| 摘 要： | 探讨了冻土介电常数的测量方法,通过实验初步研究了冻土介电常数随频率、温度和含水量的变化规律.
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| 关 键 词： | 介电常数 冻土 未冻水含量 |
| 修稿时间： | 2007-02-09 |
LABORATORY MEASUREMENT OF THE DIELECTRIC CONSTANT OF FROZEN SOIL |
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| Li Liying,Zhang Lixin,Zhao Shaojie.LABORATORY MEASUREMENT OF THE DIELECTRIC CONSTANT OF FROZEN SOIL[J].Journal of Beijing Normal University(Natural Science),2007,43(3):241-244. |
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| Authors: | Li Liying Zhang Lixin Zhao Shaojie |
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| Institution: | School of Geography and Remote Sensing Science, State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing Applications of Chinese Academy of Seiences; Beijing Key Laboratory of Enviromental Remote Sensing and City Digitalization, Beijing Normal University; 100875, Beijing, China |
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| Abstract: | Dielectric constant is a critical parameter in establishing microwave emission and scatter model of frozen soil.The phase transition in soil water results in a big change of the dielectric constant for frozen soil owing to the big difference of the dielectric constant between liquid water(80) and ice(3.15).In order to further understand the dielectric properties of frozen soil,a laboratory experiment is carried out to measure the dielectric constant of frozen soils.The soil samples are taken from wali in Chaoyang District of Beijing.Temperature controllers are used for Laboratories to control the temperature of soil from 248 K to 293 K to make the frozen soil artificially.The complex dielectric constant of soil samples are measured by an Agilent PNA Network Analyzer E8362B in 1-20 GHz frequency range.The coaxial probe technique combined with a high temperature probe is used in the experiment. |
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| Keywords: | dielectric constant frozen soil unfrozen water constant |
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