Abstract: A robot and a system for a medical operation of corona viruses e.g., COVID-19 sampling are provided. The robot includes a resilient connector, connecting plates connected with the resilient connector, stretchable and retractable assemblies, a driving assembly and a flexible sampling assembly; two ends of the stretchable and retractable assembly are respectively connected with adjacent two connecting plates, the stretchable and retractable assembly includes stretchable and retractable components divided into at least two stretchable and retractable groups and arranged around the resilient connector, the driving assembly drive the stretchable and retractable component to be switchably stretched or retracted, the flexible sampling assembly is configured to collect COVID-19 specimens of respiratory tract. The robot can be bent and moved freely in special-shaped human respiratory tract, realize secretions sampling of human respiratory tract and reduce pain and difficulty of examination.

Abstract: An in-situ and on-line acoustic measuring system for natural gas flux at the hydrocarbon seeps at a seafloor includes a seepage tent and a flow measuring channel. The flow measuring channel includes a lower bubble breaking channel, an ultrasonic transducer measuring channel and an upper bubble breaking channel. The lower bubble breaking channel communicates with the seepage tent provided with bubble breaking grids. Lower and upper bubble breaking devices, arranged in a bubble rising direction, are respectively mounted in the lower and upper bubble breaking channels. One side of the ultrasonic transducer measuring channel is fixedly connected with an acoustic wave demultiplexer, and the other side is fixedly connected with flat receiving transducers receiving transmitting acoustic waves generated by an acoustic wave branching unit.

Abstract: An in-situ and on-line acoustic measuring system for natural gas flux at the hydrocarbon seeps at a seafloor includes a seepage tent and a flow measuring channel. The flow measuring channel includes a lower bubble breaking channel, an ultrasonic transducer measuring channel and an upper bubble breaking channel. The lower bubble breaking channel communicates with the seepage tent provided with bubble breaking grids. Lower and upper bubble breaking devices, arranged in a bubble rising direction, are respectively mounted in the lower and upper bubble breaking channels. One side of the ultrasonic transducer measuring channel is fixedly connected with an acoustic wave demultiplexer, and the other side is fixedly connected with flat receiving transducers receiving transmitting acoustic waves generated by an acoustic wave branching unit.