Zobrazeno 1 - 9
of 9
pro vyhledávání: '"ZOU Zhe-qiang"'
Publikováno v:
Gong-kuang zidonghua, Vol 39, Iss 9, Pp 1-4 (2013)
In view of problem of false data existed in coal mine monitoring and control system, the paper summed up main causes of false data of coal mine monitoring and control system through field investigation, testing and analyzing, pointed out surge interf
Externí odkaz:
https://doaj.org/article/45c9c7b760294b69b689e76de1800967
Publikováno v:
Gong-kuang zidonghua, Vol 39, Iss 7, Pp 1-4 (2013)
The paper introduced testing method of mean time between failures, did site test of mean time between failures in four coal mines to the same coal mine monitoring system, and got mean time between failures of main equipments of the monitoring system.
Externí odkaz:
https://doaj.org/article/547e9455c6b542e7be12ab69148373be
Autor:
ZOU Zhe-qiang, QU Shi-jia
Publikováno v:
Gong-kuang zidonghua, Vol 39, Iss 6, Pp 1-5 (2013)
The paper detailedly analyzed problems of how to determine lag time of data between two sensors, effect of sensor error, accuracy rate of alarm in application of alarming method for abnormal data of coal mine gas based on three kinds of correlation m
Externí odkaz:
https://doaj.org/article/ca93452d7a4b44dbabc1214efbb34925
Publikováno v:
Gong-kuang zidonghua, Vol 39, Iss 5, Pp 1-5 (2013)
In view of problem that underground monitoring devices are mainly influenced by electromagnetic interferences of medium and low frequency band, main electromagnetic interferences of medium and low frequency band of coal mine underground, namely surge
Externí odkaz:
https://doaj.org/article/7b01454c27e440a5ad58a00fb2a7afe1
Publikováno v:
Gong-kuang zidonghua, Vol 38, Iss 6, Pp 28-32 (2012)
In view of problem that interference meter or spectrum analyzer can only measure radiated interference intensity of interference source in industrial environment, the paper proposed a measuring method for induced and conducted interference in industr
Externí odkaz:
https://doaj.org/article/affd1e289089484680fe18ada52eace6
Autor:
ZOU Zhe-qiang, QU Shi-jia
Publikováno v:
Gong-kuang zidonghua, Vol 37, Iss 9, Pp 1-5 (2011)
For problems of low reliable performance and inadequate utilization of monitored data of safety monitoring system of coal mine, a viewpoint was proposed that system reliability could be improved by prolonging mean time between failures of important e
Externí odkaz:
https://doaj.org/article/129dbff4e16d4bd58c1a1957b0369151
Autor:
ZOU Zhe-qiang
Publikováno v:
Gong-kuang zidonghua, Vol 36, Iss 7, Pp 26-29 (2010)
According to characteristics of complex structure and various interconnection equipments with increasing quantity of coal mine monitoring and control system,the paper analyzed applicability of traditional authentication method of intrinsically safe i
Externí odkaz:
https://doaj.org/article/d546c42927454cc78404bd937b09beb3
Autor:
ZOU Zhe-qiang
Publikováno v:
Gong-kuang zidonghua, Vol 36, Iss 4, Pp 1-4 (2010)
The paper discussed key problems of measurement of reliability indexes of safety monitoring and control system of coal mine such as determination of invalidation range, set of scale of test system, design of test stress and selection of test scheme,
Externí odkaz:
https://doaj.org/article/b849f8940ce04113afb9850cfbdba477
Publikováno v:
Gong-kuang zidonghua, Vol 39, Iss 10, Pp 6-8 (2013)
In view of problems of low flexibility and limited access numbers of optical network terminal when mine-used GEPON system is expanded, a new type of mine-used GEPON system based on optical port expander was proposed. Principle, constitution and appli
Externí odkaz:
https://doaj.org/article/dab371f49bab4b0aa05437e59eb3280b