全国土地动态监测系统总体研究--全国耕、林、草地总量和土地动态监测分析决策支持系统   总被引：1，自引：0，他引：1  

寇有观  吴敏 《国土资源遥感》1999,(1):319

讨论了全国土地动态监测系统的目标、任务和可行性,提出了系统总体设计思路和土地利用分类编码标准。  相似文献   

爆发性气旋发展中斜压强迫与潜热释放作用的数值试验   总被引：2，自引：0，他引：2  

寇正  欧阳子济 《气象科学》1999,19(3):259-269

本文利用一个六层原始方程模式对五例爆发性气旋的发展进行了数值试验,试验结果表明：斜压强迫是气旋爆发性发展的基本因子,而潜热释放的重要性则有较大差异。潜热释放的作用主要集中在两个方面：一是对低层的直接增暖,加强了上升运动;二是对局地斜压性的加强,促进了锋面、槽脊系统的发展,而这两者均有利于气旋的发展。  相似文献   

Tectonic-lithofacies palaeogeographic reconstruction of the Yangtze Craton of the Ediacaran Doushantuo Formation and its oil and gas significance          下载免费PDF全文

Zhou Xiao-Feng  Yang Feng-Li  Yang Rui-Qing  Kou Xiao-Hu  Zhuang Yuan 《古地理学报》1999,22(4):647-662

Recently,great breakthroughs have been obtained in shale gas exploration in the Ediacaran Doushantuo Formation in the Yangtze Craton. Thus,the tectonic-lithofacies palaeogeography of the Yangtze Craton during the Doushantuo depositional period was in urgent need to be further studied. Based on a large number of outcrop sections,latest drilling data,numerous previous studies,we reconstructed the tectonic-lithofacies palaeogeography of the Yangtze Craton. The results indicated that,during the Ediacaran Doushantuo Period,the tectonic background of the Yangtze Craton was not only controlled by its palaeogeographic location(at the northwest of the supercontinent Rodinia),but also by the thermal sedimentation after the continental rifting. The tectonic-lithofacies palaeogeography of the Yangtze Craton generally showed higher terrain in the west and the north,and lower in the east and the south,with four oldlands developed namely the Hannan,Kangdian,Niushoushan and Jiangnan oldlands. The sedimentary pattern was featured by three platforms(in the Upper Yangtze,Middle-Lower Yangtze,and northern Zhejiang regions)alternated with four basins(in the Wanyuan-Dazhou,west Hubei-Hunan,southeastern and northern Yangtze margins). The three platforms were dominated by restricted-open platform facies; the four basins were dominated by platform margin slope,shelf and bathyal facies. The four oldlands(provided the main detrital provenance),together with the syn-depositional faults and the palaeostructure of the underlying rift basins,controlled the tectonic-sedimentary characteristics of the Yangtze Craton during the Ediacaran Doushantuo Period. The paper has proposed that the southern Shaanxi,northeastern Sichuan,western Hubei,and the adjacent area of the Hunan,Guizhou and Chongqing are the most favorable distribution areas of the Doushantuo source rocks;the northern Zhejiang and southern Anhui areas are the secondary favorable distribution areas. These favorable distribution areas and their adjacent areas are considered to be favorable regions for deepening the deep natural gas exploration in the Yangtze Craton.  相似文献   

Spatial patterns of Pinus tabulaeformis and Pinus massoniana forests in Qinling-Daba Mountains and the boundary of subtropical and warm temperate zones     

Yao  Yonghui  Hu  Yufan  Kou  Zhixiang  Zhang  Baiping 《地理学报(英文版)》2020,30(9):1523-1533

The Qinling Mountains is not only the geographical boundary between North and South China,but also the boundary between subtropical and warm temperate zones.It plays an important role in the geo-ecological pattern of China.However,there is controversy about the specific location of this geographical boundary in academic community due to the complexity,transition and heterogeneity of the transitional zone,as well as the differences in the delimitation indicators and research purposes.To further reveal the characteristics of the North-South transitional zone and clarify the specific location of the geo-ecological boundary between North and South China,combined with SRTM topographic data,temperature and precipitation data,Pinus massoniana forest and Pinus tabulaeformis forest,which represent subtropical coniferous forest in South China and temperate coniferous forest in North China respectively,were chosen to analyze their spatial distributions in the Qinling-Daba Mountains and the climatic conditions at their boundary with the climatic indexes of annual precipitation,the coldest month(January) average temperature,the warmest month(July) average temperature and the annual average temperature.The results show that:(1) Pinus massoniana and Pinus tabulaeformis forests and the climate indicators of their boundary can be used as one of the vegetation-climate indexes for the delimitation of subtropical and warm temperate zones.The boundary between the subtropical coniferous forest(Pinus massoniana forest) and temperate coniferous forest(Pinus tabulaeformis forest) is located along the south slope of Funiu Mountain to the north edge of Hanzhong Basin(the south slope of Qinling Mountains) at an altitude of 1000–1200 m,where the climatic indictors are stable:the annual precipitation is about 750–1000 mm,the annual average temperature is about 12–14℃,the coldest monthly average temperature is 0–4℃,and the warmest monthly average temperature is about 22–26℃.(2) It can be more scientifically to delimitate the boundary of subtropical and warm temperate zones in China by comprehensively considering the vegetation-climate indicators.Additionally,the boundary between subtropical and warm temperate zones in Qinling-Daba Mountains should be a transitional zone consisting of the boundaries of coniferous forests,broad-leaved forests and shrubs between subtropical and warm temperate zones.The results provide a scientific basis for the selection of delimitation index of subtropical and warm temperate zones.  相似文献   

初论“数字国土”   总被引：3，自引：0，他引：3  

寇有观  傅亿恺 《地球信息科学学报》2000,2(1):12-14

论文讨论了数字国土的主要内容、技术路线、基础研究和基础工作 ,提出国土动态监测系统和国土资源管理信息系统的总体方案。  相似文献   

DRY/WET CLIMATE CHANGE SINCE 960 A.D.IN TAIHU DRAINAGE BASIN OF CHINA   总被引：1，自引：0，他引：1  

WANG Zhang-hua  CHEN Zhong-yuan  KOU Ying  CHEN Yu 《中国地理科学(英文版)》2001,11(4):343-349

IINTRODUCTION climate chang巳 divided d叮／wet penodS and discussed itsrelationships with cold／warm vanatlon and solar activityRecords ofellmate dlsasterhave been abundantly（CHEN198飞 1989）．IOund In Chinese historical literature．Previous works The present study tends to establish the dry／wethave collected such records to study the historical elf－series since 960 A．D．ofTal…  相似文献   

Identification of the governing parameters related to rock indentation depth by using similarity analysis   总被引：1，自引：0，他引：1  

Shao-Quan Kou  Yi Huang  Xiang-Chun Tan  Per-Arne Lindqvist 《Engineering Geology》1998,49(3-4):261-269

This paper focuses on the indentation depth in rocks caused by a hemispherical indenter. The problem is approached by a combination of similarity methods with an artificial neural network. The similarity methods offer a profound understanding of the physical problem and help to identify the most important governing parameters or factors that reflect the essence of the rock indentation events, thus simplifying the target problem. The artificial neural network provides an advanced computing model, which allows more factors to be involved. The predictions obtained using this combined approach are in better agreement with the experimental results than predictions using other methods.  相似文献   

黄河冲积扇对中原城市群的地质控制作用          下载免费PDF全文

闫震鹏  赵云章  焦红军  寇亚飞 《地学前缘》2010,17(6):278-285

黄河冲积扇是中国中东部山前地区最大的冲积扇,其主体位于河南省。黄河冲积扇的形成发育的地质环境条件,冲积扇的地层岩性结构、水文地质特征,以及与其相邻地貌单元的地质和资源条件共同决定了中原城市群各城市的分布、发展规模、发展方向、产业结构等要素。通过黄河冲积扇的形成演化和本身地质、水文地质条件研究,从地质角度分析和探讨了中原城市群城市可持续发展的有利条件和影响因素,旨在为中原城市群的规划、建设提供地质科学依据。  相似文献   

对发展青海物探工作的设想与建议     

寇玉才 《青海国土经略》2001,(Z1)

通过分析研究当前我省物探工作中存在的问题和困难,提出了如何开展我省物探工作的设想与建议。  相似文献   

Characterization of calcium deposition induced by Synechocystis sp. PCC6803 in BG11 culture medium   总被引：1，自引：0，他引：1  

闫华晓  韩作振  赵辉  周仕学  迟乃杰  韩梅  寇小燕  张艳  徐琳琳  田晨晨  秦松 《中国海洋湖沼学报》2014,32(3):503-510

Calcium carbonate （CaCO3） crystals in their preferred orientation were obtained in BG11 culture media inoculated with Synechocystis sp. PCC6803 （inoculated BG11）. In this study, the features of calcium carbonate deposition were investigated. Inoculated BGll in different calcium ion concentrations was used for the experimental group, while the BGll culture medium was used for the control group. The surface morphologies of the calcium carbonate deposits in the experimental and control groups were determined by scanning and transmission electron microscopy. The deposits were analyzed by electronic probe micro-analysis, Fourier transform infrared spectrum, X-ray diffraction, thermal gravimetric analysis and differential scanning calorimetry. The results show that the surfaces of the crystals in the experimental group were hexahedral in a scaly pattern. The particle sizes were micrometer-sized and larger than those in the control group. The deposits of the control group contained calcium （Ca）, carbon （C）, oxygen （O）, phosphorus （P）, iron （Fe）, copper （Cu）, zinc （Zn）, and other elements. The deposits in the experimental group contained Ca, C, and O only. The deposits of both groups contained calcite. The thermal decomposition temperature of the deposits in the control group was lower than those in the experimental group. It showed that the CaCO3 deposits of the experimental group had higher thermal stability than those of the control group. This may be due to the secondary metabolites produced by the algae cells, which affect the carbonate crystal structure and result in a close-packed structure. The algae cells that remained after thermal weight loss were heavier in higher calcium concentrations in BGll culture media. There may be more calcium- containing crystals inside and outside of these cells. These results shall be beneficial for understanding the formation mechanism of carbonate minerals.  相似文献