Results 21 to 30 of about 1,686,605 (255)

Development of data acquisition instrument for coal and gas outburst based on wireless communication

open access: yesMeikuang Anquan, 2022
Aiming at the problem of long measuring time and low efficiency of K1 value measuring instrument for drilling cuttings gas desorption index used in coal mine at present, based on the related requirements of prevention and control of coal and gas ...
WANG Yanbin
doaj   +1 more source

Kansas Safe Kids Annual Report

open access: yes, 2022
Safe Kids Kansas is a 501c(3) charitable organization and is a member of Safe Kids Worldwide, a global organization dedicated to preventing injuries in children.
Safe Kids Kansas, Inc.
core   +1 more source

Audio and Video System for Mine Search and Rescue Robot Based on Linux

open access: yesMeikuang Anquan, 2020
The audio and video system of mine search and rescue robot is designed based on the Linux. The system selects a 1/2.7 inch CMOS USB binocular camera, BH1750 light intensity acquisition and 850 nm infrared compensation light as the video acquisition ...
LI Wenfeng, BAI Juntao
doaj   +1 more source

Structural characterization of intrinsically disordered proteins by NMR spectroscopy. [PDF]

open access: yes, 2013
Recent advances in NMR methodology and techniques allow the structural investigation of biomolecules of increasing size with atomic resolution. NMR spectroscopy is especially well-suited for the study of intrinsically disordered proteins (IDPs) and ...
Contreras-Martos, Sara   +7 more
core   +1 more source

Several Methods of Reducing Discharge Energy for Intrinsic Safety Power Supply

open access: yesMeikuang Anquan, 2020
In order to reduce the discharge spark energy of the intrinsic safety power supply, several measures are proposed in this paper. When the over-current protection occurs, DC-DC or AC-DC module should be turned off as quickly as possible, and the ...
DONG Jianguo, LI Yanmin, ZHOU Xingdong, ZHANG Lei
doaj   +1 more source

Kansas Safe Kids Annual Report

open access: yes, 2023
Safe Kids Kansas is a 501c(3) charitable organization and is a member of Safe Kids Worldwide, a global organization dedicated to preventing injuries in children.
Safe Kids Kansas, Inc.
core   +1 more source

An extendable optical fibre probe survey meter for naturally occurring radioactive material (NORM) and other weak emitters

open access: yesScientific Reports, 2023
We have developed a radioluminescence-based survey meter for use in industries in which there is involvement in naturally occurring radioactive material (NORM), also in support of those needing to detect other weak emitters of radiation.
H. T. Zubair   +13 more
doaj   +1 more source

Distance measurement between bus equipment based on RS485 data frame timing

open access: yesGong-kuang zidonghua, 2021
There are a large number of online equipment working in underground coal mines that do not have positioning function and the equipment installed with wireless positioning are susceptible to electromagnetic interference, resulting in low positioning ...
BAI Sizhong1,2
doaj   +1 more source

Kansas Safe Kids Annual Report

open access: yes, 2021
Safe Kids Kansas is a 501c(3) charitable organization and is a member of Safe Kids Worldwide, a global organization dedicated to preventing injuries in children.
Safe Kids Kansas, Inc.
core   +1 more source

Design of intrinsically safe laser auxiliary light source for low-illumination video acquisitio

open access: yesGong-kuang zidonghua, 2019
For problems of high power consumption, large volume, close irradiation distance and poor concealment of existing auxiliary light source for low-illumination video acquisition, a design scheme of intrinsically safe laser auxiliary light source for low ...
LI Wenfeng, CAI Pengbo
doaj   +1 more source

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