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30 results on '"Li, Yeqiang"'

25. Molecular epidemiology of measles viruses in China, 1995–2003

Author

Ma Yujie, Yang Xiuhui, Liu Wei, Ba Zhuoma, Zhou Shunde, Lu Yiyu, Zhang Jinlin, Yang Xuelei, Zhang Hong, Yan Xinge, Liu Guiyan, Zhou Jianhui, He Weikuan, Guan Ronghui, Li Ping, Ma Yan, Tian Jiang, He Jilan, Lin Chunyan, Zhao Chunfang, Ling Hua, Tian Hong, Zheng Lei, Wang Tongzhan, Li Congyong, Wang Changyin, Tang Wei, Zhang Zhenying, Hu Jiayu, Wang Jianguo, Rota Paul A, Jiang Xiaohong, Zhu Zhen, Zhang Yan, Liang Yong, Li Yeqiang, Ji Yixin, Featherstone David, Bellini William J, Xu Songtao, Liang Guodong, and Xu Wenbo

Subjects
Infectious and parasitic diseases, RC109-216
Abstract

Abstract This report describes the genetic characterization of 297 wild-type measles viruses that were isolated in 24 provinces of China between 1995 and 2003. Phylogenetic analysis of the N gene sequences showed that all of the isolates belonged to genotype H1 except 3 isolates, which were genotype A. The nucleotide sequence and predicted amino acid homologies of the 294-genotype H1 strains were 94.7%–100% and 93.3%–100%, respectively. The genotype H1 isolates were divided into 2 clusters, which differed by approximately 2.9% at the nucleotide level. Viruses from both clusters were distributed throughout China with no apparent geographic restriction and multiple co-circulating lineages were present in many provinces. Even though other measles genotypes have been detected in countries that border China, this report shows that genotype H1 is widely distributed throughout the country and that China has a single, endemic genotype. This important baseline data will help to monitor the progress of measles control in China.

Published
2007
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27. Wideband high‐gain SIW‐fed antenna array for mm‐Wave applications.

Author

Li, Xiangxiang, Li, Yeqiang, Li, Zhe, Kong, Qinglong, Wang, Hailin, and Lv, Guoqiang

Subjects
*POWER dividers, *ANTENNA arrays, *ANTENNAS (Electronics), *BANDWIDTHS
Abstract

A wideband high‐gain mm‐Wave antenna array operating in Ka‐band is reported. The antenna element consists of an antipodal Vivaldi antenna (AVA) with plated through vias on the edges of the radiating arms, which is utilized to eliminate the harmful gap resonance due to the electrically discontinuity. A modified wideband 8‐way substrate integrated waveguide (SIW) power divider is proposed to feed the linear array. In addition, in order to enhance antenna gain, a stacked dielectric superstrate is employed, which achieves 2.3 dBi average gain improvement over 25‐40 GHz. The proposed structure provides superior bandwidth of 25.4‐40 GHz with S11 < −9.5 dB (corresponding to VSWR < 2). The modified SIW power divider, 1 × 8 AVA array and the dielectric superstrate are designed and fabricated, resulting in a wideband and high‐gain structure as compared to other SIW‐fed antennas. A prototype is experimentally verified. The measured results show that the impedance bandwidth ranges from 25.37 to 39.48 GHz (S11 < −9.6 dB, relative bandwidth of 43%). The measured gain varies from 15.5 to 18.5 dBi in the frequency range with an average gain of 16.6 dBi. [ABSTRACT FROM AUTHOR]

Published
2020
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28. Molecular epidemiology of measles viruses in China, 1995–2003

Author

Zhang, Yan, Zhu, Zhen, Rota, Paul A, Jiang, Xiaohong, Hu, Jiayu, Wang, Jianguo, Tang, Wei, Zhang, Zhenying, Li, Congyong, Wang, Changyin, Wang, Tongzhan, Zheng, Lei, Tian, Hong, Ling, Hua, Zhao, Chunfang, Ma, Yan, Lin, Chunyan, He, Jilan, Tian, Jiang, Li, Ping, Guan, Ronghui, He, Weikuan, Zhou, Jianhui, Liu, Guiyan, Zhang, Hong, Yan, Xinge, Yang, Xuelei, Zhang, Jinlin, Lu, Yiyu, Zhou, Shunde, Ba, Zhuoma, Liu, Wei, Yang, Xiuhui, Ma, Yujie, Liang, Yong, Li, Yeqiang, Ji, Yixin, Featherstone, David, Bellini, William J, Xu, Songtao, Liang, Guodong, Xu, Wenbo, Zhang, Yan, Zhu, Zhen, Rota, Paul A, Jiang, Xiaohong, Hu, Jiayu, Wang, Jianguo, Tang, Wei, Zhang, Zhenying, Li, Congyong, Wang, Changyin, Wang, Tongzhan, Zheng, Lei, Tian, Hong, Ling, Hua, Zhao, Chunfang, Ma, Yan, Lin, Chunyan, He, Jilan, Tian, Jiang, Li, Ping, Guan, Ronghui, He, Weikuan, Zhou, Jianhui, Liu, Guiyan, Zhang, Hong, Yan, Xinge, Yang, Xuelei, Zhang, Jinlin, Lu, Yiyu, Zhou, Shunde, Ba, Zhuoma, Liu, Wei, Yang, Xiuhui, Ma, Yujie, Liang, Yong, Li, Yeqiang, Ji, Yixin, Featherstone, David, Bellini, William J, Xu, Songtao, Liang, Guodong, and Xu, Wenbo

Abstract

This report describes the genetic characterization of 297 wild-type measles viruses that were isolated in 24 provinces of China between 1995 and 2003. Phylogenetic analysis of the N gene sequences showed that all of the isolates belonged to genotype H1 except 3 isolates, which were genotype A. The nucleotide sequence and predicted amino acid homologies of the 294-genotype H1 strains were 94.7%–100% and 93.3%–100%, respectively. The genotype H1 isolates were divided into 2 clusters, which differed by approximately 2.9% at the nucleotide level. Viruses from both clusters were distributed throughout China with no apparent geographic restriction and multiple co-circulating lineages were present in many provinces. Even though other measles genotypes have been detected in countries that border China, this report shows that genotype H1 is widely distributed throughout the country and that China has a single, endemic genotype. This important baseline data will help to monitor the progress of measles control in China.

Published
2007

29. Molecular epidemiology of measles viruses in China, 1995–2003

Author

Zhang, Yan, primary, Zhu, Zhen, additional, Rota, Paul A, additional, Jiang, Xiaohong, additional, Hu, Jiayu, additional, Wang, Jianguo, additional, Tang, Wei, additional, Zhang, Zhenying, additional, Li, Congyong, additional, Wang, Changyin, additional, Wang, Tongzhan, additional, Zheng, Lei, additional, Tian, Hong, additional, Ling, Hua, additional, Zhao, Chunfang, additional, Ma, Yan, additional, Lin, Chunyan, additional, He, Jilan, additional, Tian, Jiang, additional, Li, Ping, additional, Guan, Ronghui, additional, He, Weikuan, additional, Zhou, Jianhui, additional, Liu, Guiyan, additional, Zhang, Hong, additional, Yan, Xinge, additional, Yang, Xuelei, additional, Zhang, Jinlin, additional, Lu, Yiyu, additional, Zhou, Shunde, additional, Ba, Zhuoma, additional, Liu, Wei, additional, Yang, Xiuhui, additional, Ma, Yujie, additional, Liang, Yong, additional, Li, Yeqiang, additional, Ji, Yixin, additional, Featherstone, David, additional, Bellini, William J, additional, Xu, Songtao, additional, Liang, Guodong, additional, and Xu, Wenbo, additional

Published
2007
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