江汉平原农村空间网络的结构与功能研究

认为农村空间网络主要由交通网络、信息网络、电力网络构成．以江汉平原中的湖北省荆州地区为例，运用系统科学、区域科学有关理论，定性与定量结合的方法，分析了区内农村空间网络结构的特点，说明空间网络的不断完善已成为区域经济发展的重要推动力，为加速农村工业化发挥了积极作用，为农村空间创新奠定了基础．根据区内农村空间结构中存在的问题，提出了加大公路建设力度，发展综合运输；加强邮政建设，开发信息产业；拓宽电源渠道，增大电力供给等优化区域农村空间网络结构的措施和策略     

南阳农村信息网络建设

本从农村信息网络建设的现状及农业信息化问题入手，阐述了农村信息网络是国家信息网络建设的有机组成部分。结合南阳的具体情况，论述了南阳农村科技信息网络建设中的有关问题。     

山区县域村庄布局重组研究——以山西柳林县为例

村庄重组是山区县新农村建设和调整区域空间结构的重要环节，是有效配置农村基础设施和公共服务设施，促进农村经济发展的突破口，是脱贫战略与生态建设的现实需求。文章提出了村庄重组的基本思路、原则要求和中心村选择、基层村分类调控、城中村分类改造的框架性方案，并提出相应的政策建议。     

抓住机遇克服困难加快农村经济信息网发展

目前，农业信息化成为世界农业发展的新趋势，农村经济信息网络建设是市场农业的必然要求，是农业部门转变职能的必然选择，为加快浙江省台州市农村经济信息网络建设的进程，提高台州市农村经济信息网络建设水平，本文从台州农村经济信息网络的发展现状及存在问题入手，探索农村经济信息网的发展。一、台州农村经济信息网络的发展现状1、农村经济信息网络的发展过程。台州市所辖三区二市四县，农村经济信息网络建设，以互联网的开通为标志，起步于1999年下半年，临海市农业局和温岭市农经委分别在1999年10月和12月开通各自的网站；2000年下…     

近代历史传承与当代乡村发展

近代历史传承与当代乡村发展小田江泽民同志在党的“十五大”报告中，从产业形式、空间结构和社会主体三个视角，明确指出了乡村社会在中国当代经济发展中的重要性：“坚持把农业放在经济工作的首位，稳定党在农村的基本政策，深化农村改革，确保农业和农村经济发展、农民...     

榆中县高原夏菜该如何更好的走可持续发展之路

蔬菜产业已是榆中农村经济发展的支柱产业,为了使之健康、快速地持续发展,我们不仅在种植规模上要继续扩大,而重要的是在思想观念上必须要有创新意识。增加科技投入,建全产销信息网络,树立自己的品牌。促进榆中农村经济快速发展。     

自媒体时代农村赋权型信息网络构建探析

自媒体时代的农村信息网络构建对农业发展、农村建设、农民生产都具有重要的现实意义.明确新时期基层政府角色定位,鼓励农民自组织发展,提供现代信息技术支撑,完善农村信息网络工作制度,构建农村赋权型信息网络格局,不仅是自媒体时代农村信息技术发展的需要,而且是政府实现善治的重要体现.     

信息网络产业推动广东经济发展转型

通过研究国际信息网络产业发展趋势,阐述了广东省网络产业现状,分析了广东省发展信息网络产业面临的良好机遇,明确加快信息网络发展是推动广东经济发展方式转变的重要举措,并提出加快广东信息网络发展的政策建议。     

山东省区域发展与空间结构研究

以县市为单位对1995年和2004年两年的山东省区域经济差异变化过程进行了实证分析.按1995年和2004年两个年份分别计算各县市的综合经济实力,并按各县市的综合经济实力绘制两个年份的山东省区域经济差异空间结构分布图,以揭示山东省空间结构演化特征,并根据山东省空间结构演化特征分析山东省经济发展,并对山东省的空间结构演化及经济发展做出了预测.     

浙江省农业现代化与农村经济发展的灰色关联分析

农业现代化是发展农村经济，提高农民收入的重要条件，本文运用灰色关联分析方法研究了浙江省农业现代化与农村经济发展的关系，通过研究，发现农业电气化水平对农村经济发展的影响最大，其次是机械化水平，而农田灌溉对农村经济发展的影响最小，最后根据灰色关联分析的结果，提出了对农业现代化建设的若干建议。     

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.     

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.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.