维普中文期刊产品整合服务
2篇 您的检索式:作者名="CHENG Zefu"
    题名 作者 年代 出处 被引量
1Analysis of Rockfall and Its Impact on the Cut-and-Cover Tunnel in Dynamics显示文摘This paper presents the effect of thickness of Buffer layer on the safety of cut-and-cover tunnel under the given magnitude and height of rockfall, and the limit load of the structure. To establish calculating models of rockfall in different conditions, the dynamics of the fall down to the surface of the slope is taken into account and the exterior characteristics of the rockfall is analyzed. We have derived the formula for calculating velocity of rocks before and after collision, calculated the impact load upon the structures below and the limit load, and compared the impact force and limit load to judge the safety of the structure. Finally, the validity of models is approved by the safety evaluation of cut-and-cover tunnel in the mouth of Heshang Mountain in Nandan County.SONG Shuzhi KONG Jiming WANG Chenghua CHENG Zefu YANG Zongji 2006Wuhan University Journal of Natural Sciences2006,11,4:5
2Molecular signatures of parallel adaptive divergence causing reproductive isolation and speciation across two genera显示文摘Parallel evolution of reproductive isolation(PERI)provides strong evidence for natural selection playing a fundamental role in the origin of species.However,PERI has been rarely demonstrated for well established species drawn from different genera.In particular,parallel molecular signatures for the same genes in response to similar habitat divergence in such different lineages is lacking.Here,based on whole-genome sequencing data.Zefu Wang Yuanzhong Jiang Xiaoyue Yang Hao Bi Jialiang Li Xingxing Mao Yazhen Ma Dafu Ru Cheng Zhang Guoqian Hao Jing Wang Richard J.Abbott Jianquan Liu 2022The Innovation2022,3,3:0
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费