Zobrazeno 1 - 10
of 2 438
pro vyhledávání: '"Peng Ming"'
Analysis of wireless transmission tests in mines and preferred working frequency bands for mining 5G
Publikováno v:
Gong-kuang zidonghua, Vol 50, Iss 10, Pp 1-11, 20 (2024)
The development and deployment of mobile communication systems, personnel and vehicle positioning systems in mines require an analysis of wireless transmission characteristics, the selection of preferred working frequency bands, and the optimization
Externí odkaz:
https://doaj.org/article/dda41d20bdec4a99b5d5c7974fda5981
Autor:
SUN Jiping, PENG Ming
Publikováno v:
Gong-kuang zidonghua, Vol 50, Iss 4, Pp 1-8 (2024)
In order to meet the different requirements of coal mine monitoring, positioning, video, audio, remote control, 5G and other services for latency, reliability, bandwidth and other indicators, the coal mine information comprehensive bearer network sho
Externí odkaz:
https://doaj.org/article/66ce2b7f88ae454f9255a6f066bc3e71
Publikováno v:
Horticultural Science, Vol 51, Iss 1, Pp 59-67 (2024)
Many studies have demonstrated that brassinolide improves the drought tolerance of plants. This study aims to test whether the drought tolerance of chrysanthemums can be improved by brassinolide and to clarify the underlying physiological mechanism.
Externí odkaz:
https://doaj.org/article/898b61f4383442b8918591350b9ab1a0
Autor:
SUN Jiping, PENG Ming
Publikováno v:
Gong-kuang zidonghua, Vol 50, Iss 3, Pp 1-5 (2024)
High power radio waves emitted by mobile communication systems such as 5G, 5.5G, WiFi6, WiFi7, UWB, ZigBee, as well as personnel and vehicle positioning systems in mines, pose a risk of igniting gas and coal dust. Therefore, it is necessary to set a
Externí odkaz:
https://doaj.org/article/1c907a99cb9d47e8b139c52f5d57e3c9
Autor:
SUN Jiping, PENG Ming
Publikováno v:
Gong-kuang zidonghua, Vol 50, Iss 6, Pp 1-5, 22 (2024)
The current national standard GB/T 3836.1-2021 Explosive atmospheres-Part 1: Equipment-General requirements and the international standard IEC 60079-0:2017 Explosive atmospheres-Part 0: Equipment-General requirements stipulate that the threshold powe
Externí odkaz:
https://doaj.org/article/d677469e564d49e08d3e611951b45fa3
Publikováno v:
Gong-kuang zidonghua, Vol 49, Iss 4, Pp 1-8 (2023)
The application of technologies such as 5G, UWB, ZigBee and WiFi6 in coal mine mobile communication, personnel and vehicle positioning, and wireless transmission has promoted coal mine safety production and intelligent construction. However, due to t
Externí odkaz:
https://doaj.org/article/5b002a0840954eceb3c64763ec93bc10
Publikováno v:
Gong-kuang zidonghua, Vol 49, Iss 2, Pp 1-5 (2023)
The powerful radio waves can ignite explosive gases. Therefore, it is necessary to reasonably set the radio wave explosion-proof safety power and energy threshold emitted by the radio transmitter to limit the radio wave power and energy emitted by th
Externí odkaz:
https://doaj.org/article/ced6fd5c7b704442a5405cebd4bb90ad
Publikováno v:
Gong-kuang zidonghua, Vol 48, Iss 10, Pp 123-128 (2022)
At present, the design and plan of the mine mobile communication system and the personnel and vehicle positioning system mainly depend on experience and field test. There are some problems such as heavy workload, difficult optimization of the layout
Externí odkaz:
https://doaj.org/article/d7c10425229146e0969ba3e89fc36c10
Publikováno v:
Open Medicine, Vol 18, Iss 1, Pp e00222-66 (2023)
Hepatic fibrosis (HF) is a precursor of liver cirrhosis, and activated hepatic stellate cells are an important driver of fibrosis. F-box and WD repeat domain containing 7 (FBXW7) expression level is down-regulated in HF, but the underlying mechanism
Externí odkaz:
https://doaj.org/article/421d177291174c8186b4de3595b35d89
Single borehole radar detection suffers from azimuthal ambiguity, while borehole optical tests only provide information about the borehole wall. These limitations prevent either detection method from revealing the complete spatial patterns of rock fr
Externí odkaz:
http://arxiv.org/abs/2410.11350
