Results 31 to 40 of about 77 (65)
Mine emergency broadcasting system based on Ethernet and voice compression expansion
Meikuang AnquanIn response to the problems of coverage blind spots, short intrinsic safety power supply distance, and incomplete functions in the mine emergency broadcasting system, a set of mine emergency broadcasting system with full coverage of emergency ...
Dedong ZOU
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A mine intrinsically safe AD hoc network base station design
Meikuang AnquanAiming at the problem that the underground communication link of the mine is interrupted and the information of rescuers cannot be exchanged after the disaster, a mine intrinsically safe AD hoc network base station is designed. Based on the SDR platform,
Wenfeng LI +4 more
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The Psychos Are Coming, the Psychos Are Coming … They’re Already Here
Voices in Bioethics, 2016 American director Steven Soderbergh’s Contagion wastes no time in laying out the context of his film on the contemporary interconnectedness of the earth’s inhabitants and the concomitant susceptibility to catastrophe that such relationships imply ...
Edmund Weisberg
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Gong-kuang zidonghua, 2012 In view of problem of diversity existed in signal output forms of analog sensor, an intrinsic safety current-frequency conversion circuit based on PIC single-chip microcomputer was designed.
ZHAO Guang-xu
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Shanghai Jiaotong Daxue xuebaoLow-voltage distribution systems frequently experience leakage current accidents. However, it is challenging to distinguish fault characteristics in abnormal operating conditions, such as electric shock to biological organisms and three-phase imbalance ...
XU Han, ZHU Sanli, ZHANG Tengfei, CHEN Shu, LIU Mingxiang
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Tachometric Cup Anemometer with Wind Direction Indicator and Fibre-Optic Signal Transmission
SensorsThis article presents an innovative design of a tachometric anemometer for measuring wind velocity and direction, which does not contain electronic components and systems or power supply systems in the measurement area.
Paweł Ligęza +2 more
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Design of a Soft-start Circuit for Mine-used Intrinsic Safety Device
Gong-kuang zidonghua, 2011 For problems that instantaneous large current in start of mine-used devices could lead to power supply cutting-off and abnormal start of the devices, the paper introduced design of a kind of soft-start circuit for mine-used intrinsic safety devices which
FANG Bin, SHEN Xiao-qiang, QIU Yu
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Research on key technology and engineering application of emulsion pump in super-high mining face
Meitan kexue jishuWith the continuous development and progress of intelligent unmanned mining technology in coal mines, more and more intelligent unmanned fully-mechanized mining faces with large mining heights and super mining heights have been built and put into ...
Ran LI +9 more
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Design of Mine-used Radar Level Meter
Gong-kuang zidonghua, 2012 In view of problem of bad precision in measurement of coal level of coal bunker by use of ultrasonic level meter, the paper introduced design of a radar level meter based on radar ranging principle. The meter takes surface radar probe as measurement unit
SUN Li, LI Qing-zhao, PAN Shou-guo
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New Energy-Storage Metal Vanadium Resources: Demand Prediction and Supply Analysis
中国工程科学As new energy sources such as solar and wind energy develop rapidly, energy storage will usher in explosive growth owing to its ability to solve the problems of intermittent power generation.
Renfeng Chen +9 more
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