Tsinghua University

Wuhan University

Satellite Application Center for Ecology and Environment, Mee

Yanting Wu

Jian Qiao Sun

Hao Sun

Chen Wang

Chao Wang

Yi Shan Jiang

Nan Wang

Qian Zhao

Xin Qi

Jian Sun

Jianhui Zhang

Dan Xu

Bin Meng

Jixi Gao

Shoujing Yin

Lin Fu

Xiling Zhao

Shigang Zhang

Hongyan Yang

Weiwei Yang

Xiaogang Zhang

Huan Zhao

Xuelei Wang

Yihuang Nie

Changlei Xiao

Yaming Zhou

Xing Jia

Daoke Tang

The present disclosure provides a method, apparatus, medium and device for extracting a river drying-up region and frequency, and belongs to the technical field of remote sensing. The method for extracting a river drying-up region and frequency can be applied to efficiently acquiring river drying-up information for a long time within the large spatial region. With the inverse normalized difference water index (iNDWI) and the maximum value composite (MVC) method for the remote sensing images, the present disclosure omits the troublesome step of separately extracting a river range for each image in the conventional method. In addition, the present disclosure quickly obtains the drying-up frequency by counting the total number of available images and the number of non-water images at the same pixel position, and yields a greater efficiency for extracting the river drying-up region and frequency.

Method, apparatus, medium and device for extracting river drying-up region and frequency

An inner power plant portion and a heat exchange station portion. The inner power plant portion includes a heat exchanger, a waste heat recovery electric heat pump, an energy-storing electric heat pump, high/low temperature water storing tanks, a heating network heater, a valve and a circulating water pump; the heat exchange station portion includes high/low temperature water storing tanks, an electric heat pump, a heat exchanger, a valve and a circulating water pump; as for the operating method of the device, the device can operate in periods of an electrical load trough, an electrical load flat and an electrical load peak respectively through combination of different valve switches, the high temperature water storing tank is used for balancing the difference between system heat supply amount and heating load, the low temperature water storing tank is used for stabilizing steam exhaust waste heat recovery amount.

Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof

Growing community of inventors

Beijing, China

Yanting Wu