排序方式: 共有158条查询结果,搜索用时 15 毫秒
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ZHOU Changhai WU Shaohong DAI Erfu HAO Chengyuan PAN Tao 《科学通报(英文版)》2006,51(B11):97-107
To study the causation and ecological effect of "Corridor" phenomena in the Longitudinal Range-Gorge Region (LRGR) in South China and South-East Asian. Supported by the geographic information system (GIS), vegetation, climate and topography database of the LRGR are founded, The northernmost limit of the tropical rain forest is 28ο-22, which has been promoted 3 or 4 latitude by Vapor "Corridor Phenomenon". Through ANN analysis, landform proves to be a very important factor affecting NPP distribution. Affected by longitudinal valley landform and monsoon, moisture and quantity of heat has a longitudinal belt distribution, and NPP distribution has seemly distribution. Take Lyonia ovalifolia, Myrica nana scrub as an example, high NPP valuescrub distributes on a wet-tongue area in the valleys. The minimum temperature sensitive value to NPP is 1.588, and altitude is 1.053, precipitation is 1.006, aspect is 1.003. Corridor phenomenon in the LRGR formed special moisture and heat patterns and brings about a series of ecological effects, such as influencing space distribution of vegetation form and NPP spatial patterns of both vegetations and plants. 相似文献
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《华东理工大学学报(自然科学版)》2011,37(4):473-473
A major obstacle for commercialization of ultrathin supported Pd-type H2 separation membranes is the still unproven mechanical long-term stability. Therefore the permeation behavior of a PdAg/ceramic c... 相似文献
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《华北科技学院学报》2012,(4):F0003-F0003
按照华北科技学院“卓越工程师教育培养计划”的要求,为做好学生遴选工作,教务处下发了《关于开展2012级安全工程专业“卓培计划”试点班学生遴选的通知》,安全工程学院为此成立了卓培计划工作小组。 相似文献
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"V起O来”这个动词短语形式活跃在书籍、杂志之中,为人们所熟悉。但是对于这个格式的研究成果目前还很少,即使有也是在与其它相关格式的比较鉴别中一带而过,并未进行深入研究。本文在前人相关研究成果的基础上,用“三个平面”理论,分别在形式和意义上对“V起O来”格式进行多角度的研究和探讨。所举例子典型概括,尽量在研究中做到仔细观察,认真分析,描写充分,解释充分。 相似文献
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各位老师:
你们好!当每月一期的《青年科学》又如期到我手中时,我随手一翻发现书角有一组关于“曹操墓”的题,顿时来了兴趣。关于曹操墓,这一轰动世界的新闻,大多数人都想知道结果,想当年这位叱咤风云的人物,在三国中最富深刻意义的人物形象,他的墓究竟什么样呢? 相似文献