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Xin Zhou, Xiaofei Liu, Xiaohu Zhao, Xiaoran Wang et autres
cn (code pays fourni par la source)
Yu Huo, Yonggang Xu, Xiaohu Zhao, Yanjing Sun et autres
Wireless underground sensor network (WUSN) has potential application value in environmental monitoring, disaster detection, and personnel rescue in the coal mine collapsed zone. Due to the absorption and reflection of rocks and minerals, the attenuation law of the electromagnetic signal in the …
cn (code pays fourni par la source)
Yan Sun, Ying Zhang, Zhiying Chen, Xinchang Lin et autres
cn (code pays fourni par la source)
A novel tri-band patch antenna with enhanced bandwidth and a diverse radiation pattern is presented in this study. An off-center probe is introduced to excite a conventional circular patch antenna, and the multi-frequency resonance modes of TM01, TM02, and TM03 with different …
cn (code pays fourni par la source)
Chengyuan Song, Yu Huo, Xiaohu Zhao, Weishan Gao et autres
The data transmission rate in wireless systems is limited by the transmission delay in the physical channel. In order to improve the data transmission rate of the wireless system in the mine environment, the time delay model of the mine wireless channel …
cn (code pays fourni par la source)
Miao Sun, Shuang Yang, Yuquan Tang, Xiaohu Zhao et autres
In a distributed fiber optic temperature sensing system, the intensity of Raman Stokes backscattering light serving as reference light increases with the increase of temperature, leading to measurement errors in the system. A novel method of dynamically calibrating Raman Stokes backscattering light …
Mingzhi Jiao, Xiaoyu Chen, Kexiang Hu, Deyu Qian et autres
Abstract Methane is an explosive gas in coalmines and needs to be monitored by methane sensors. Conductive‐type methane sensors are small, simple and stable, and they are very promising for mining safety or home safety applications. They can even be employed in …
cn (code pays fourni par la source)
Yu Huo, Qingsong Hu, Yanjing Sun, Xiwang Guo et autres
In order to reduce the path loss of the wireless communication signal in the underground tunnel, a scheme for configuring the antenna polarization of wireless systems based on a zone-division method is proposed. A multimodal method is used to estimate the effect …
cn (code pays fourni par la source)
Yaqiang Zheng, Min Gao, Xiaohu Zhao
Yu Huo, Lei Zhao, Qingsong Hu, Enjie Ding et autres
A deployment strategy for antennas is proposed to enhance the field coverage of wireless devices in underground coal mines, which uses the multimodal approach. Based on the attenuation coefficient of each mode, the propagation loss of the vertically polarized modes with n …
cn, us (code pays fourni par la source)
Shuqi Wang, Feng Xu, Alexander Chi Fai Ip, Mrudula Somu et autres
Cell separation or sorting plays an important role in basic research and clinical applications such as the differentiation of stem cells, detection of circulating tumor cells (CTCs) and quantification of CD4+ T lymphocytes in peripheral blood. Microfluidics-based cell separation or sorting often …
Ma Hongyu, Qin Shunli, Liying Wang, Gang Wang et autres
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