中国科学院机构知识库网格
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浏览/检索结果: 共7条,第1-7条 帮助

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The Genetic Control of the Compound Leaf Patterning in Medicago truncatula 期刊论文  OAI收割
FRONTIERS IN PLANT SCIENCE, 2022, 卷号: 12, 期号: _, 页码: -
作者:  
  |  收藏  |  浏览/下载:34/0  |  提交时间:2022/04/25
The basic law of the formation and expansion in urban agglomerations 期刊论文  OAI收割
JOURNAL OF GEOGRAPHICAL SCIENCES, 2019, 卷号: 29, 期号: 10, 页码: 1699-1712
作者:  
Fang Chuanglin
  |  收藏  |  浏览/下载:44/0  |  提交时间:2020/03/23
The basic law of the formation and expansion in urban agglomerations 期刊论文  OAI收割
JOURNAL OF GEOGRAPHICAL SCIENCES, 2019, 卷号: 29, 期号: 10, 页码: 1699-1712
作者:  
Fang Chuanglin
  |  收藏  |  浏览/下载:16/0  |  提交时间:2020/03/23
Molecular Weight Dependency of Crystallization and Melting Behavior of beta-Nucleated Isotactic Polypropylene 期刊论文  OAI收割
journal of polymer science part b-polymer physics, 2014, 卷号: 52, 期号: 19, 页码: 1301-1308
Lu, Ying; Wang, Qiao; Men, Yongfeng
收藏  |  浏览/下载:38/0  |  提交时间:2015/10/19
Compounds of isotactic polypropylene (iPP) and beta-nucleating agent were used to investigate the relationship between the development of beta phase and molecular weight in iPP under quiescent crystallization conditions by using wide angle X-ray diffraction and differential scanning calorimetry techniques. In all cases  the dependency of the formation of beta phase in iPP on molecular weight of iPP at a defined crystallization temperature range was found. The iPP with high molecular weight possessed a wide range of crystallization temperature in inducing rich beta phase. However  poor or even no beta phase was obtained for the samples with low molecular weight in the same range. In addition  an upper critical crystallization temperature of producing dominant beta phase was found at 125 degrees C. Beyond this temperature  a phenomenon of prevailing alpha phase became obvious. (C) 2014 Wiley Periodicals  Inc.  
Fractal study on urban systems in the underdeveloped regions in west China: A case study in the Lanzhou-Xining town compact region 会议论文  OAI收割
2010 International Conference on Management and Service Science, Wuhan, China, 2010
Zhu; Bing1; 2; Zhang; Xiaolei1; Lei; Jun1; Duan; Zuliang1
收藏  |  浏览/下载:29/0  |  提交时间:2011/08/23
A numerical study of stress/strain response to oil development in reservoir rocks-a case study in Xingshugang area of Daqing Anticline 会议论文  OAI收割
9th World Congress on Computational Mechanics and 4th Asian Pacific Congress on Computational Mechanics, WCCM/APCOM 2010,, Sydney, NSW, Australia, July 19, 2010 - July 23,2010
Li, Zian; Ma, Teng; Yi, Jin; Zhang, Lu; Zhu, Yan; Sun, Yaliang; Zhu, Jun; Zhu, Jiangjian; Lin, Ge
收藏  |  浏览/下载:47/0  |  提交时间:2014/12/07
Formation pressure and the underground stress field will be disturbed by high pressure injection and production activities during oilfield development. Such disturbance will induce the deformation of formation rock  sometimes causing formation to slip. As a result  production wells and/or injection wells will encounter sanding  casing deformation  or even casing shear problems. This article introduced a simulation study on formation pressure and the underground stress field variation during injection and production activities in the Xingshugang area of the Daqing Anticline  Songliao Basin  China. The relationships of injection pressure to formation pressure  underground stress field variation  and strain variation were investigated in this paper. 2010 IOP Publishing Ltd.  
Embryology of Zippelia begoniaefolia (Piperaceae) and its systematic relationships 期刊论文  OAI收割
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY, 2002, 卷号: 140, 期号: 1, 页码: 49-64
作者:  
Lei, LG;  Wu, ZY;  Liang, HX
  |  收藏  |  浏览/下载:23/0  |  提交时间:2012/01/05