1. Hebei Province Key Laboratory of Test/Measurement Technology and Instrument, School of Electrical Engineering Yanshan University Qinhuangdao China
2. School of resources and environment Henan Polytechnic University Jiaozuo China
3. Geological Environment Monitoring Engineering Technology Innovation Center of The Ministry of Natural Resources Center for Hydrogeology and Environmental Geology, China Geological Survey Baoding China
4. Hebei Sailhero Environmental Protection Hi‐tech Co., Ltd Shijiazhuang China