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9,493 results on '"Zhou Zheng"'

306. China's application of the One Health approach in addressing public health threats at the human-animal-environment interface: Advances and challenges

Author

Liu, Jing-Shu, Li, Xin-Chen, Zhang, Qi-Yu, Han, Le-Fei, Xia, Shang, Kassegne, Kokouvi, Zhu, Yong-Zhang, Yin, Kun, Hu, Qin-Qin, Xiu, Le-Shan, Wang, Xiang-Cheng, Li, Odel Y., Li, Min, Zhou, Zheng-Bin, Dong, Ke, He, Lu, Wang, Shu-Xun, Yang, Xue-Chen, Zhang, Yan, Guo, Xiao-Kui, Li, Shi-Zhu, Zhou, Xiao-Nong, and Zhang, Xiao-Xi

Published
2023
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312. Development and validation of a deep learning-based fully automated algorithm for pre-TAVR CT assessment of the aortic valvular complex and detection of anatomical risk factors: a retrospective, multicentre study

Author

Wu, Yongjian, Wang, Moyang, Song, Guangyuan, Zhang, Haibo, Zhou, Daxin, Wang, Fang, Liu, Changfu, Yu, Bo, Xu, Kai, Yin, Zongtao, Cong, Hongliang, Jiang, Nan, Zhang, Pengfei, Zhang, Xiquan, An, Jian, Jiang, Zhengming, Tao, Ling, Yang, Jian, Zhang, Junjie, Zhao, Xianxian, Lu, Fanglin, Liu, Xianbao, Wu, Yanqing, Luo, Jianfang, Chen, Lianglong, Fang, Zhenfei, Shang, Xiaoke, Niu, Guannan, Chen, Yang, Zhou, Zheng, Feng, Dejing, and Zhang, Yuxuan

Published
2023
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317. Location based spectrum sensing evaluation in cognitive radio networks

Author

Yao Haipeng, Zhao Chenglin, and Zhou Zheng

Subjects
Spectrum sensing, cognitive radio, cumulate interference, outage probability, Telecommunication, TK5101-6720, Electronics, TK7800-8360
Abstract

Abstract This letter addresses the problem of spectrum sensing over fading channel, in which a licensee and multiple unlicensed users coexist and operate in the licensed channel in a local area. We derive the overall average probabilities of detection and false alarm by jointly taking the fading and the location of SUs into account and employing the energy detection as the underlying detection scheme. Furthermore, we develop a statistical model of cumulate interference by the help of the overall average probabilities of detection. Based on the cumulate interference, we also obtain a closed-form expression of outage probability at the primary user's receiver according to a specific distribution of the fading.

Published
2011

319. Interference Mitigation between Ultra-Wideband Sensor Network and Other Legal Systems

Author

Li Bin, Zhou Zheng, Zou Weixia, Zhao Feng, Li Zhuo, and Li Dejian

Subjects
Telecommunication, TK5101-6720, Electronics, TK7800-8360
Abstract

Ultra-wideband impulse radio (UWB-IR) sensor network has intensive military and commercial applications. However, the interference between UWB and other existed networks should be casually investigated. In this paper, we consider interference mitigation in UWB sensors in the context of cognitive radio (CR). Firstly, we suggest a general state transition model to characterize the working states evolution of legal networks, also referred to as primary users (PU). Spectrum sensing, used to identify the state of PU, is formulated as detection of a corresponding state sequence. Maximum posterior probability (MAP) criterion is adopted to perform spectrum sensing. By exploring potential gain of state transitions, detection probability for nearby networks is improved significantly. Subsequently, based on the radius basis function neural network (RBF), we present a novel spectrum sculptor to design UWB waveforms. Attributed to the excellent reconfiguration of RBF, our scheme can produce UWB waveforms tracing available spectrums. The designed waveforms can entirely utilize multiple unoccupied bands to maintain uninterrupted communications. Also, sufficient spectral attenuation can be generated in specific bands to mitigate mutual interference between UWB sensors and other networks. Besides, orthogonal waveforms can be easily derived, which either improves transmission performance or provides a flexible accessing strategy for UWB sensors.

Published
2010

320. Radar and Sonar Sensor Networks

Author

Wang Lingming, Cheng Xiuzhen, Samn SherwoodW, Huang ScottC-H, Zhou Zheng, and Liang Qilian

Subjects
Telecommunication, TK5101-6720, Electronics, TK7800-8360
Published
2010

321. A Novel Ultra-Wide Band Signal Generation Scheme Based on Carrier Interference and Dynamics Suppression

Author

Zhang Luyong, Yao Haipeng, He Liu, and Zhou Zheng

Subjects
Telecommunication, TK5101-6720, Electronics, TK7800-8360
Abstract

This paper initiatively puts forward a novel synthesis design for generating UWB narrow pulse by using CI (Carrier Interference) subcarrier waveform synthesis and Bessel function expansion. Through adaptively adjusting the initial phases of multiple sub-carriers according to the location information, CI (Carrier Interference) sub-carrier waveform synthesis signal could achieve better performance. More specifically, when the carrier arrives at the receiver with a particular phase, the dynamic change of this signal amplitude can be significantly reduced by introducing sinusoidal frequency modulation signals. The method has significance for improving the overall performance of UWB communication system. This paper gives theoretical analysis and computer simulation results as well as the functional block diagram.

Published
2010

345. Associations of combined healthy lifestyles with cancer morbidity and mortality among individuals with diabetes: results from five cohort studies in the USA, the UK and China

Author

Zhang, Yan-Bo, Pan, Xiong-Fei, Lu, Qi, Wang, Yan-Xiu, Geng, Ting-Ting, Zhou, Yan-Feng, Liao, Linda M., Tu, Zhou-Zheng, Chen, Jun-Xiang, Xia, Peng-Fei, Wang, Yi, Wan, Zhen-Zhen, Guo, Kun-Quan, Yang, Kun, Yang, Han-Dong, Chen, Shuo-Hua, Wang, Guo-Dong, Han, Xu, Wang, Yi-Xin, Yu, Danxia, He, Mei-An, Zhang, Xiao-Min, Liu, Lie-Gang, Wu, Tangchun, Wu, Shou-Ling, Liu, Gang, and Pan, An

Published
2022
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