遥感影像技术在农田保护方面的应用

进行农村耕地保护调查,开展农村产权改革,查清土地利用现状,掌握城乡土地利用潜力和未利用状况,是统筹城乡用地、促进土地节约集约用地的基础。卫星遥感技术在城市规划和国土资源管理上的应用,将带动城市规划和国土资源管理方式的变革。人们已经越来越多的将遥感技术应用到国土资源管理当中,利用遥感影像开展耕地保护调查及卫片执法,是当前国土部门重点开展的项目之一。该文介绍以遥感技术为手段,根据遥感影像提取的信息开展耕地保护来介绍遥感技术在国土资源管理部门一些应用。     

遥感技术在水土保持监测工作中的应用与展望

本文讨论了遥感技术在水土保持监测工作中的利用,探讨了遥感技术基本概念,讨论遥感技术在水土保持监测工作中的应用与展望了。     

遥感技术在生态省建设中的应用

遥感技术科技含量高,发展速度快,应用领域广,倍受世人瞩目.通过遥感技术在国土资源的规划与利用、环境资源的管理与保护、自然灾害的监测与预防和重大工程的决策与建设等领域应用,阐述遥感技术在生态省建设中的重大作用,展望遥感技术在整个国民经济建设乃至全球性课题中的应用.     

土地利用遥感动态监测计算机实施系统的研究

论述了如何将遥感技术、地理信息系统、管理信息系统和数学模型集成在一起 ,研制一套实用的土地利用动态监测、变化趋势预报和质量综合评价的供政府部门辅助决策的应用系统     

中国“智慧国土”工程建设现状与发展

 随着生态文明体制改革的不断深入、自然资源监管体制的不断完善、国土空间用途管制的全面实施,迫切需要云计算、物联网、大数据等新一代信息技术支撑下智慧国土建设理念的创新和思路的完善。基于中国独特的社会经济背景,在分析中国"智慧国土"工程建设历程、主要内容和基本特征的基础上,以江苏省为典型案例,阐述了中国"智慧国土"项目建设的共性特征和一般路径;从国土"大数据"集成、国土可持续利用能力评价与动态管理、国土利用空间格局动态模拟与监测、国土空间管制分区仿真模拟、基于"大数据"的风险预警与风险联动管理5个层面,提出了构建基于国土空间用途管制的智慧国土框架体系。     

县市级地籍动态监测系统研究

本文是在我国1996年开展土地利用动态监测试验的基础上,提出的一种新的动态监测模式。这种监测模式利用了GPS卫星定位技术,全站仪测量技术以及计算机数据处理技术,结合试验中所用的遥感技术,从而形成一种新的动态监测模式。     

土地利用动态监测技术的研究

以土地利用数据库为本底,应用遥感技术,在实践中探讨遥感与土地信息系统的一体化集成方法,寻找快速度、高精度更新土地利用数据库的有效途径,实现土地利用动态监测.     

遥感技术在农业应用的进展分析

遥感技术作为一种有效获取信息手段,以及准确观测地面的先进技术,在农业领域已经得到了广泛的应用。文章经过对其在农业应用进展的现状进行深入研究,明确了农作物识别分类与面积估算;农作物长势监测与产量估产;农作物叶面指数、叶绿素含量监测与养分诊断;农业灾害监测;农用地提取与动态监测5大方面的研究为遥感技术在农业工作中的应用重点。文中就5大方面的研究进行了提炼与总结,并在此基础上提出未来遥感技术在农业应用中的发展方向,对遥感技术在农业方面更为广阔的应用具有借鉴作用。     

广东省海岸带湿地遥感调查与开发

应用遥感技术监测广东省海岸带湿地资源与环境现状及发展动态,查清广东省现有海岸湿地1084297hm^2,对海岸湿地的利用方式以水产养殖、农田用地、城镇建设用地及捕捞渔业为主。探讨广东省海岸带湿地资源与环境保护、管理及开发利用措施。     

遥感技术在山西土地资源永续利用中的应用

对遥感技术在山西土地资源永续利用中的有利因素、适用范围、存在问题进行了分析研究，明确提出了遥感技术在山西土地永续利用中应采取的对策与措施，指出将遥感技术用于山西土地资源动态监测，不仅具有可行性，而且具有可操作性，不仅具有理论意义，而且具有现实意义。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.