Chongqing University of Arts and Sciences

Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, P.r.c.

Wuhan University

Satellite Application Center for Ecology and Environment, Mee

Shoujing Yin

Wei Zhuang

Qiang Li

Fei He

Weixin Li

Yinjing Wan

Ruiming Han

Xiaoyan Tang

Wenjing Li

Changxin Zou

Aiping Liu

Xiaohan Li

Guoquan Pan

Wenlin Wang

Bo Liu

Hao Sun

Chen Wang

Chao Wang

Nan Wang

Qian Zhao

Jianhui Zhang

Dan Xu

Bin Meng

Jixi Gao

Xiaogang Zhang

Yanting Wu

Hongyan Yang

Xing Jia

Weimin Wang

Huan Zhao

Xuelei Wang

Yihuang Nie

Yaming Zhou

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

A detection device for simultaneous in-situ measurement of dissolved oxygen at different submerged plant leaf-water interface levels. The detection device includes a dissolved oxygen micro-optrode host. A plurality of detection probes are externally connected to the dissolved oxygen micro-optrode host and can extend out probes. The detection device includes a leaf clamp having an upper clamping head, a lower clamping head, a hinged shaft and a clamping handle. Each of the upper and lower clamping head includes a plurality of water passing cavities penetrating through the back and the front thereof. Each of the upper and lower clamping head includes a plurality of slots horizontally extending inwardly of the corresponding clamping head. The detection device includes a plurality of insertion pieces having a probe groove. The detection probe is locatable in the respective probe groove for fixation. The insertion pieces are insertable and fixable in the slots.

Detection device and method for simultaneous in-situ measurement of dissolved oxygen at different submerged plant leaf-water interface levels

A spliced detection apparatus for simultaneous wide-range in-situ detection of dissolved oxygen in a sludge-water interface of the present invention comprises a dissolved oxygen shimmer host, several detection probes, a casing and detection kits, several vertically through seat chambers being disposed in the casing, the detection kits can be placed and fixed in the seat chambers, the detection kits may be placed on the sludge-water interface, and each detection kit is provided with a vertically through water passage chamber, while the front side face and the back side face of the detection kit are respectively provided with several front slots and rear slots horizontally extending into the detection kit respectively, the detection apparatus further comprises tabs, with probe grooves being provided on the tabs, each detection probe can be put into the probe groove of the corresponding tab and fixed therein, the tabs may be inserted either into the front slots or the rear slots and can enable the probe tips of the detection probes to be placed in the water passage chamber, the detection apparatus can carry out simultaneous wide-range detection of the dissolved oxygen at different heights and horizontal positions of the sludge-water interface, and thus is quick and convenient for use.

Spliced detection apparatus for simultaneous wide-range in-situ detection of dissolved oxygen in sludge-water interface and detection method therefor

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Beijing, China

Shoujing Yin