WWW及其在情报检索中的应用

ＷＷＷ是一种基于超文本的信息发布工具，目前已成为Ｉｎｔｅｒｎｅｔ网络信息检索方式的主流，并大有发展成为网络标准检索工具的趋势．概括地介绍了Ｉｎｔｅｒｎｅｔ网上ＷＷＷ及其在情报检索中的应用和存在的问题．     

WWW上数据库出版方法的研究

数据库的内容在环球网（ＷｏｒｌｄＷｉｄｅＷｅｂ，简称ＷＷＷ）上出版，是目前网络信息建设中十分有意义和迫切的任务．笔者分析了在ＷＷＷ上出版数据库的几种方法，重声、讨论了使用ＣＧＩ程序实现ＷＷＷ上出版数据库的方法．     

WWW上数据库出版方法的研究

数据库的内容在环球网上出版，是目前网络信息建设中十分有意义和迫切的任务，笔者分析了在ＷＷＷ上出版数据库的几种方法，重点讨论了使用ＣＧＩ程序实现ＷＷＷ上出版数据库的方法。     

化学与全球信息网WWW

文献检索是化学研究者最为重要的工作之一，计算机及计算机网络技术的发展使文献检索工作方式取得了划时代的进展，利用ＷＷＷ浏览和获取化学资源是当今化学工作者从事研究工作极富挑战性的工作，本文叙述了ＷＷＷ的基本原理和通过ＷＷＷ化学信息的方法，并给出部分Ｉｎｔｎｅｒｅｔ化学资源。     

基于Internet的高等化学网络试题库的设计与实现

本文介绍基于Ｉｎｔｅｒｎｅｔ的高等化学网络试题库的设计和实现。并在贵州大学化学的ＩｎｔｅｒｎｅｔＷｅｂ服务器上建立了ＡＣＥＱＬＮ的ＷＷＷ服务。     

WWW在东南大学校园网中的应用

ＷＷＷ在东南大学校园网中的应用吴洁（东南大学信息中心，南京２１００１８）１ＷＷＷ及ＭＯＳＡＩＣ简介环球信息网ＷＷＷ（Ｗｏｒｌｄ－Ｗｉｄｅ－Ｗｅｂ）是Ｉｎｔｅｒｎｅｔ网上最为流行的信息检索服务程序，是信息发现技术和超文本技术的综合．ＷＷＷ服务器把信息组...     

一种基于模糊分类网络的信息分类方法

针对信息搜索与挖掘中存在的关键词多义性及用户对所要查询信息的分类存在一定的模糊性问题,提出了一种基于模糊分类网络的信息挖掘方法。该方法利用模糊分类网络固有的对模糊信息的非线性处理能力和自适应学习机制,通过对WEB页面大量分类文档信息的学习,建立了基于模糊分类网络的信息分类器和挖掘模型。构造的信息分类模型结构简单、学习收敛速度快且易于实现。文中给出了分类策略和实现算法,并以中国石油网油气管道专题信息分类为例验证了方法的有效性。     

Internet网络中的WWW系统及HTML语言

Ｉｎｔｅｒｎｅｔ网络中的ＷＷＷ系统及ＨＴＭＬ语言张月琳，姚卓英，陈滢（东南大学信息中心，南京２１００１８）环球信息网ＷＷＷ（ＷｏｒｌｄＷｉｄｅＷｅｂ）是分布式的超文本信息检索系统，采用客户机／服务器模式，客户机与服务器之间采用超文本传输协议ＨＴＴＰ（...     

网上学生成本查询系统

介绍了本校基于校园网络的学生成绩查询系统的开发，该系统运行在安装有ⅡＳ的ＷｉｎｄｏｗｓＮＴ环境下，提供了基于Ｉｎｔｅｒｎｅｔ／ＷＷＷ的学生成绩查询服务。     

基于ORDB的Web GIS空间数据管理研究

进入２０世纪９０年代以来 ,随着网络技术的发展 ,原来的基于单机模式的ＧＩＳ已经无法满足用户对共享地理信息的需要 ,越来越多的人期通过Ｉｎｔｅｒ ｎｅｔ获取地理信息 ,基于网络的ＧＩＳ顺势而生。由于大多数网络ＧＩＳ的客户端采用了ＷＷＷ协议 ,因此学术界把类似的地理信息系统称为ＷｅｂＧＩＳ。其主要目的就是在网络环境下实现地理信息的存储、处理、分析与显示 ,使用户能通过通用浏览器（ＩＥ或ＮＳ）访问并获取地理信息 ［１］。一、ＷｅｂＧＩＳ的特点和空间数据可视化的过程ＷｅｂＧＩＳ作为当前ＧＩＳ领域的研究热点和未来的发…     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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。     

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.     

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

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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     

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