加入WTO与我国政府采购制度的完善

政府采购制度的推行是公共消费领域的一种制度性的创新。从发展趋势看，我国对外开放政府采购市场是不可避免的。分析了加入WTO对我国的政府采购制度带来的影响，给出了构建我国政府采购制度的基本框架。     

浅析政府采购与高校教材供应

本在分析政府采购形成与特点的基础上，认为在我国的高校教材供应中建立政府采购制度，是符合社会主义市场经济与中国加入WTO的要求，促使我国高校教材供应健康发展的必由之路。     

原产地规则与我国政府采购

原产地规则已经发展成为各国在WTO体制下保护本国经济利益的有力工具。近几年，我国政府采购规模日益扩大，在政府采购中原产地规则问题日益突出。为了适应政府采购的发展需要，应该尽快制定我国政府采购中的原产地规则，保护国内产业和工业，大力开拓国内政府采购市场，以有利于引进外资和高新技术，促进民族工业的更快发展。     

政府采购：不只是政府买东西

广东顺德读者麦健给本栏目发来邮件说：经常听到“政府采购”这个词，也知道咱们国家有个《政府采购法》。好像是在去年底，中国启动了加入WTO《政府采购协议》的谈判，在这方面，似乎与其他国家还存在着一些矛盾。政府采购，不就是政府买东西吗？怎么还有那么多问题甚至还要谈判？希望专家介绍一下这方面的内容。 为满足这位读者的要求。本栏目特请对外经贸大学的教授撰写了此文。     

WTO与建立政府采购制度的关系

阐述了我国加入WTO后建立政府采购制度的作用与意义，提出建立政府采购制度。可强化企业市场竞争意识，为参与国际竞争打下基础，在符合国际惯例的前提下，最大限度地维护本国利益。     

加入GPA,我国开放政府采购市场对策研究

加入WTO的《政府采购协议》、开放政府采购市场是当前我国政府采购制度面临的一个迫切问题,本文试从我国现状出发,参考《政府采购协议》及发达国家的实践经验,提出我国开放政府采购市场的一些对策。     

政府采购促进科技创新的法律对策

分析了经济全球化时代政府采购促进科技创新职能所面临的挑战，指出为兼顾开放政府采购市场与保护民族自主高新技术产业的双重需要，宜通过合理运用WTO规则、完善国内法体系、积极运用行政指导措施等来应对挑战。     

论WTO《政府采购协议》的招标程序

WT0《政府采购协议》属于《建立WTO协议》附件4中诸边协议之一，虽然是自愿加入的，但考虑到我国入世时的承诺，加入仅仅是一个时间问题．因此，该协议必然对我国的政府采购体制、特别是政府投资项目的招标产生重大影响．本文分析了《政府采购协议》的原则、招标公告的发布、资格评审、投标、开标、评标、中标等程序，对完善我国的招标投标制度有借鉴意义．     

WTO《政府采购协定》中的国民待遇分析

中国的政府采购无论是在国内还是在国际上都具备了相当大的规模。因此,深入了解WTO有关政府采购中的国民待遇原则并采取积极态度来履行WTO义务并保障中国的权利是一项重要的课题。     

论WTO《政府采购协议》的招标程序

WTO《政府采购协议》属于《建立WTO协议》附件4中诸边协议之一,虽然是自愿加入的,但考虑到我国入世时的承诺,加入仅仅是一个时间问题.因此,该协议必然对我国的政府采购体制、特别是政府投资项目的招标产生重大影响.本文分析了《政府采购协议》的原则、招标公告的发布、资格评审、投标、开标、评标、中标等程序,对完善我国的招标投标制度有借鉴意义.     

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.     

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).     

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.     

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.