容灾系统的建设方案研究

主要依据容灾系统的建设条件和级别定义，讨论了建设容灾系统的原则，并对数据级容灾系统和应用级容灾系统的建设方案进行了分析和对比，同时还结合业界一些容灾技术进行了案例分析，最后对移动业务运营支撑系统的容灾提出了建设性的方案。      

容灾系统的建设方案研究

主要依据容灾系统的建设条件和级别定义，讨论了建设容灾系统的原则，并对数据级容灾系统和应用级容灾系统的建设方案进行了分析和对比，同时还结合业界一些容灾技术进行了案例分析，最后对移动业务运营支撑系统的容灾提出了建设性的方案。     

数字图书馆的数据备份和容灾方案

介绍了数据备份与数据容灾的概念及二者的联系与区别，阐述了数字图书馆进行数据存储和容灾的必要性，针对数据图书馆的特点，提出了相应的容灾解决方案。     

面向全系统毁坏后的服务即时恢复技术

论述了一种全新的系统容灾保护方法，它脱离了传统基于数据保护的容灾保护思路，通过复制包括数据状态以及服务运行状态在内的全系统状态，并引入并行恢复的思想，最终达到了无论系统毁坏程度如何，都能保证服务即时恢 复的目的。同时，与传统技术相比，该技术还可独立于具体设备和应用，容易做到容灾资源的共享从而节省了容灾系统的建设成本。     

容灾技术在校园网络信息中心安全中的应用与研究

随着校园信息化进程的快速发展，校园网络信息中心系统的高可用性和容灾能力已经得到更为广泛的关注和重视．文章介绍了容灾的基本理论，对容灾系统的关键技术进行了分析、讨论，并对数据级容灾系统和应用级容灾系统的建设方案进行了分析对比，最后结合本校的实际情况提出了校园网络信息中心容灾的建设性方案．     

图书馆数据容灾备份系统的设计

从数据容灾备份系统的设计策略、备份管理、人员管理等几个方面探讨了图书馆数据容灾备份系统的设计,指出图书馆应根据自身实际情况确定数据容灾备份模式,建立适合本馆的数据容灾备份系统。     

西安烟草信息系统容灾建设研究

企业信息系统是现代企业运营的基础平台,数据则是关系到客户和企业利益的核心资源。业务连续性和数据可用性是关系到企业生存的重要问题。本文分析了西安烟草信息系统建设的现状,提出了存在的问题,并通过对容灾关键技术的研究和应用,制定了西安烟草容灾系统建设的目标,并从数据容灾和应用容灾的角度提出了解决方案。     

浅谈应用级远程容灾技术

容灾系统可以在灾难发生时保证数据的一致性和业务的连续性。本文主要研究了远程容灾系统的工作过程、评价指标。重点介绍了建立应用级远程容灾系统所涉及到的一些关键技术：远程镜像技术、CDP、容灾策略、恢复策略、心跳检测技术。     

数字化图书馆的容灾系统设计

数字化图书馆的容灾系统可以在灾难事故中有效地保护其数据资源和服务的连续性,远程容灾系统是容灾方式的最佳选择.在构建容灾系统时,除考虑安全因素外,还应关注其数据管理、存储、传输及效率等内容,为此,本文探讨了容灾系统的软、硬件结构模型.     

市级异地电子政务容灾备份系统建设

随着电子政务应用的不断加强，电子政务应用系统中的各类数据越来越重要地成为各级党政机关的战略资源，但是各种意外事件如：电力中断、硬件故障、软件Bug、恶性病毒的破坏、人为错误等造成的关键数据丢失或不可用，如不能及时得到恢复，将严重影响各级党政机关工作的正常开展。因此，容灾备份系统逐渐受到各级党政机关信息主管部门的关注，本文以容灾备份技术相关情况进行阐述，并以绍兴市异地电子政务容灾备份系统建设实践为例，来探讨地市级政府异地电子政务容灾备份系统的建设。     

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.