检索结果-南通市图书馆

river basin landscape pattern and its modern earth surface process of the LRGR

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2006年第B11期51卷 33-38页

作者： GAN Shu HE Daming FENG Yan asian International river center of Yunnan University Kunming650091 China

Directing at the the longitudinal range-gorge region's special constituting condition of river basin geography landscape, the authors synthetically used the data analyses and spatial information treatment technique, selected corresponding measurable homology indicators, comparatively analyzed the characteristic difference of different river basin's landscape constitution patterns in the longitudinal range-gorge region, researched into different river net patterns and land cover conditions of each river basin landscape, and explored the river basin's landscape form and its spatial distributed chracters. Based on the analyses on river basin's landscape composition and its spatial distribution characters, this study researched into the main driving factor of modern earth surface process in the longitudinal range-gorge region, analyzed the relationship between the basin landscape changing and its modern earth surface process, finally completed a series of the potential ecological hydrology effect analyses.

关键词：江河流域风光现代地球表面作用生态水文学效数据分析

Climatic control of plant species richness along elevation gradients in the Longitudinal Range-Gorge Region

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2007年第A02期52卷 50-58页

作者： LIU Yang ZHANG YiPing HE DaMing CAO Min ZHU Hua Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Kunming 650223 China asian intemational rivers center Yunnan University Kunming 650091 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

在纵的范围峡区域(LRGR ) 在种类丰富探索举起坡度并且评估气候的变量和区域怎么可以解释种类丰富的模式， 5 座山被选择。根据举起，山，种类丰富，区域的价值和气候的变量的维的坡度在每 100 m 地区被计算。在沿着举起坡度的种子工厂... 详细信息

在纵的范围峡区域(LRGR ) 在种类丰富探索举起坡度并且评估气候的变量和区域怎么可以解释种类丰富的模式， 5 座山被选择。根据举起，山，种类丰富，区域的价值和气候的变量的维的坡度在每 100 m 地区被计算。在沿着举起坡度的种子工厂种类丰富和气候的变量和区域之间的关系被分析。结果显示出那：(1 ) 种类丰富的 Elevational 模式不是制服并且能被划分在到二种类型。种类丰富的价值在低地是更高的然后与在热带山增加举起 monotonically 减少。种类丰富在副热带的山在举起坡度的更低的一半向高价值与偏爱有单峰的模式。(2 ) 种类密度的模式在沿着举起坡度的种类丰富与那一样。(3 ) 在气候变量之中，实际土壤水分蒸发蒸腾损失总量(AET ) 与种类丰富作为水精力平衡的大小有强壮的关系。在种类丰富的衰落在副热带的山的低地由于更高的温度和更少的降水。

关键词：纵向岭谷区倾斜度气候植物物种

Key issues on watershed ecological security assessment

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2007年第A02期52卷 251-261页

作者： GAO JiXI ZHANG XiangHui JIANG Yun OU XiaoKun HE DaMing SHI JianBin Chinese Research Academy of Environmental Sciences Beijing 100012 China Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China School of Resource Environment & Earth Science Yunnan University Kunming 650091 China asian intemational river center Yunnan University Kunming 650091 China EU-China Biodiversity Programme Beijing 100044 China

有关分水岭基于关键问题的分析包括评价的题目，内容，和方法论的生态的安全评价，这篇论文指出那生态的安全应该在不同层次动态地被估计(例如分水岭和生态系统层次) 与是的人一起主要评价题目。功能的安全和结构的安全必须在分水岭被... 详细信息

有关分水岭基于关键问题的分析包括评价的题目，内容，和方法论的生态的安全评价，这篇论文指出那生态的安全应该在不同层次动态地被估计(例如分水岭和生态系统层次) 与是的人一起主要评价题目。功能的安全和结构的安全必须在分水岭被认为生态的安全评价。以便反映分水岭的全面、及时的安全地位， PSR (pressure-state-response ) 方法应该被采用。纵的范围峡区域(LRGR ) 作为一个例子被研究。分水岭的一个索引系统生态的安全评价被建议了，它包括结构的索引，功能的索引，压力和反应索引，并且生态的安全的状态在云南为 LRGR 被分析省。

关键词：生态安全生态环境分水岭评估方法

Are the fish of the upper and lower Mekong interconnected?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2009年第2期27卷 400-407页

作者：康斌 PERRETT Lisa 李运刚何大明 asian International rivers center Yunnan University

The Mekong supports one of the richest inland fisheries in the world, with many of the fish migrating long distance to spawn. Little is known about the fisheries and migration strategies of the Upper Mekong whilst it is supposed that many fish species move between the Lower and Upper Mekong. Most likely, natural fish migration in the river has been altered by dam construction across the mainstream of the Upper Mekong. In this paper, the interconnectivity of fish species between different sections of the Mekong and negative impacts of dams on migratory fish are studied. Of the 162 fish species in the Upper Mekong and the 869 species in the Lower Mekong, 61 species are common. Results show that there is no significant difference at order level between the UM and LM. Similarity coefficients are used to evaluate interconnectivity at species, genus and family levels among four different sections of the Upper Mekong with each other and with the Lower Mekong as a whole. The highest similarity is found between the middle and lower reach of the Upper Mekong at species and genus levels and the middle and upper reach at family level. Of the eight cascade dams, Mengsong Dam in planning is considered as the biggest threat to migratory fish from the Lower Mekong and should be particularly concerned.

关键词： dam biodiversity migration Mekong interconnection

Near Range Radar and Its Application to Near Surface Geophysics and Disaster Mitigation

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2015年第6期26卷 858-863页

作者： Motoyuki Sato center for Northeast asian Studies Tohoku University

In this paper, we discuss about the near range radar applied to various environmental applications and disaster mitigation issues. Synthetic aperture radar（SAR） processing or migration is the key technology in near range radar imaging, which can be used in ground penetrating radar（GPR） and ground-based synthetic aperture radar（GB-SAR）. We demonstrate some applications which include GPR for humanitarian demining, GPR for archaeological survey, GB-SAR for landslide monitoring and nondestructive inspection of wooden buildings. We also demonstrate a new array GPR system “Yakumo”, which was used for archaeological survey for demonstration of advanced multi-static radar signal processing for better radar imaging.

关键词： near range radar GPR GB-SAR disaster mitigation SAR processing migration,multi-static radar.

Research on cell communication of P. elegans by means of photon emission

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1995年第1期40卷 76-79页

作者：张锦珠 Popp Fritz-Albert 于文斗 Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China intemational of Biophysics Technology CenterKaisershautern 67661Gemany

Cell communication, sometimes also called cell signaling, has become a topical field in molecular biology, cell biology and biophysics. More and more biologists and physicists have focused their attention on this topic because of its importance in understanding essential features of living systems, i.e. growth, development, cell differentiation, oncogenesis, even neural activity,swarming of animals, and biological evolution.

关键词： cell communication electronagnetic communication photon emission coherence P. elegans.

Satellite-based monitoring of contrasting characteristics of suspended sediment discharged from the Red and the Ma river systems along the northern coast of Vietnam

在线全文

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2019年第3期34卷 191-204页

作者： Yoshimitsu Tajima Kavinda Gunasekara Hung Thanh Nguyen Department of Civil Engineering Graduate School of Engineering The University of Tokyo Geo-Informatics center Asian Institute of Technology Key laboratory of river and Coastal Engineering Vietnam Academy of Water Resources

The northern coast of Vietnam has accumulated a significant amount of sediment discharged from the multiple distributaries of rivers such as the Red river and Ma river. While recent decreases of the sediment supply appears to have a significant impact on coastal erosion, the complex network of these distributaries makes it difficult to determine the overall spatiotemporal characteristics of sediment discharges and related topographic changes. The goal of the current study is to develop a satellite-based monitoring system for observation of turbidity discharged from the multiple rivers and to investigate the applicability of the developed monitoring system through a case study on the northern coast of Vietnam. Based on the in-situ observed data, a formula was determined for estimation of the surface water turbidity as a function of the red band reflectance of Moderate Resolution Imaging Spectro-radiometer(MODIS) images. The formula was then combined with a newly determined threshold for cloud-masking to obtain maps of the nearshore turbidity patterns. These maps capture the spatiotemporal water surface turbidity along the entire coast of the Red river Delta and the coast around the Ma river mouth over the past sixteen years with frequency of twice a day. Finally, long-term trends of the turbidity patterns from multiple rivers were compared with the in-situ observation data and it was found that the Red river and the Ma river showed clearly contrasting characteristics, which reasonably explain the recent coastal shoreline changes and characteristics of sediment sampled along the coast.

关键词： Turbidity river mouth Coastal erosion MODIS

New insight into the origin and evolution of the flora and fauna of Hainan Island, China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第1期 52-61页

作者： Hua ZHU center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Yunnan International Joint Laboratory of Southeast Asia Biodiversity Conservation Yunnan Key Laboratory for the Conservation of Tropical Rainforests and Asian Elephants

The origin of the biota of Hainan Island, China, remains a fundamental scientific problem. Comparative studies on the biota, geological tectonics, and paleomagnetism proposed that during the Eocene, Hainan Island connected Vietnam and Guangxi, and then moved to the southeast to reach its present location. This review mainly discusses its biota origin from molecular phylogeny and palaeobotanical research. The formation and evolution of the biological groups of Hainan Island were identified via research on their genomes, phylogeny, and molecular biogeography. This research showed that the genera and species that appeared and diverged early in their evolution(i.e., before the Miocene) can be explained by the land connection between Hainan Island, Vietnam, and Guangxi during the Eocene-Oligocene. According to Southeast asian tectonic theory, in the Middle Miocene(at about 15 million years ago), Hainan Island had moved to its present position. The population and genetic divergence of species with late divergence times(after 15 Ma) can be reasonably explained by the close proximity(or land connection) between Hainan Island and the Leizhou Peninsula, enabling genetic communication between Hainan Island and the Chinese mainland, but have exceptional cases. Conclusions have been obtained through palaeobotanical studies, showing that in the Eocene-Oligocene period, southwest China and Hainan Island had subtropical vegetation and flora. However, the fossil group in southeast China(in Maoming, near present-day Hainan Island) in the Late Eocene indicated a tropical rainforest vegetation and flora. This suggests that in the Paleogene, Hainan Island may have been located near or on the southwest border of Guangxi and northern Vietnam, rather than in its present location. The floristic division of the flora of Hainan Island basically presents a northeast-southwest inclined distribution pattern. This pattern can be explained by the counterclockwise rotation of Hainan Island during i

关键词：

The variation and regional differences of precipitation in the Longitudinal Range-Gorge the Region

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2007年第A02期52卷 59-73页

作者： HE DaMing LI ShaoJuan ZHANG YiPing Asia intemational rivers center Yunnan University Kunming 650091 China Xishuangbanna Tropical Botanic Garden Chinese Academy of Sciences Kunming 650223 China

这份报纸基于记录在 36 个气象学的车站在 1960 ～ 2001 期间观察了的每日的降雨在纵的范围峡区域(LRGR ) 检验降水的地区性的差别。在不同空间、时间的规模的降水的地区性的差别被分析，在完成在 LRGR 的特殊走廊障碍功能下面。结果显... 详细信息

这份报纸基于记录在 36 个气象学的车站在 1960 ～ 2001 期间观察了的每日的降雨在纵的范围峡区域(LRGR ) 检验降水的地区性的差别。在不同空间、时间的规模的降水的地区性的差别被分析，在完成在 LRGR 的特殊走廊障碍功能下面。结果显示很靠近的连接在地区性的差别和走廊障碍功能之间存在：在北 LRGR 的大多数区域(> 26 湩？

关键词：地区差异性纵向岭谷区地域性走廊