基于组件技术的中国西部水资源地理信息系统的设计与实现

传统的水资源管理信息系统主要是在商用地理信息系统软件平台上开发出来的，其专业应用模型与系统平台之间不能实现无缝集成．鉴于此，笔者设计实现了基于组件式地理信息系统技术的中国西部水资源管理系统，实现了水资源管理模型与地理信息系统之间的有机集成．在ESRI公司生产的地理信息系统组件(MapObiects)基础上，开发出具有通用地理信息系统功能和水资源管理功能的应用型信息系统．在该系统支持下，用户可以实现对水资源进行计算、分析、统计等的常用功能．在Visual Basic开发环境下，利用数据库引擎(ADO)在系统中实现了系统与常用关系数据库的数据通讯．     

森林资源地理信息系统设计的关键技术

以杭州市西湖区为例，介绍了在建立一个完整的县级森林资源地理信息系统中关键的系统设计技术，这些技术包括：系统功能模块设计、空间数据库管理系统设计、属性数据库管理系统设计、属性数据库与空间数据库信息的连接、图件制作设计。该系统可为地方“数字林业”的林业基础信息平台设计提供基本方法。     

基于GIS的清河县城环境管理信息系统

清河县城环境管理信息系统是基于地理信息系统(GIS)原理，结合清河县城的实际情况而设计的，简要介绍了该系统的设计背景、构建基础，较详细地介绍了该系统的文档管理、数据库管理、图件管理、辅助分析等功能．     

基于SOA的地理信息系统空间数据库设计

随着Google Earth等应用的普及和地理数据采集成本的下降,依托于地理信息的各种系统建设及应用也日益普及。系统服务的好坏很大部分取决于数据,同样地理信息系统数据库设计对地理信息系统服务应用的质量也至关重要。由于传统生产观念的影响,服务型地理信息系统建设在数据库设计方面总是过多考虑数据如何方便更新,而往往忽略数据如何更好应对服务的设计本质。为了保障地理信息系统服务的高质量,文章在充分介绍了空间对象和空间数据库的特点和相关技术后,详细讨论了空间数据库设计的关键技术,指出了服务导向原则对该设计的重要作用,并从作者自身系统研发经验出发,阐述了面向服务的数据库建设的概念、内涵及设计要求。     

供水管网GIS中空间数据挖掘的研究与应用

以地理信息系统(GIS)为基础,详细讨论了数据挖掘、空间数据统计技术在城市供水管网维护中的应用,并针对空间数据库中数据的挖掘方法进行了分析和研究,实现了利用空间数据库中数据的挖掘方法对城市供水管网的维护.     

基于GIS的地下水空间分析系统的设计

以往的地下水管理信息系统主要是在商用地理信息系统软件平台上开发出来的,其专业应用模型与系统平台之间不能实现无缝集成．鉴于此,笔者设计实现了基于组件式地理信息系统技术的地下水空间管理系统,实现了地下水空间管理模型与地理信息系统之间的有机集成．在ESRI公司生产的地理信息系统组件(MapObjects)基础上。开发出具有通用地理信息系统功能和地下水空间管理功能的应用型信息系统．在该系统支持下,用户可以实现地下水资源计算、分析和评价等的常用功能．在Visual Basic开发环境下,利用OpenGL的函数库和数据库引擎(ADO)在系统中实现了三维可视化以及系统与常用关系数据库的数据通讯．     

基于SDE与MapObjects控件的GIS开发应用研究

阐述基于ActiveX组件技术的控件MapObjects的运行机制，主要包括：MapObjiects的功能，利用MapObjects开发GIS系统的基本步骤；空间数据引擎(Spatial Database Engine)在当前的地理信息系统(Geographic Information System)应用中的功能，以及如何较好地解决了GIS功能应用与数据库集成中数据提供与访问模式方面的制约瓶颈问题：以及MO与VB的结合以及利用ArcSDE与数据库管理系统连接在北京城市垃圾处置及选址地质环境数据库系统中取得良好的效果。     

GIS数据的数据库化方法研究

研究了Maplnfo系列地理信息系统数据的数据库化方法，讨论了Oracle Spatial技术．并用之实现了Maplnfo系列GIS数据的数据库化．设计并实现了用以克服属性数据缺损的算法，通过实验验证了该算法的可行性．     

主动数据库技术在天然气泄漏智能报警系统的应用研究

传统DBMS只能根据用户的命令被动地为用户服务，这种特点不能适应某些需要DBMS主动服务的情况．主动数据库(ADBS)为此应运而生，让数据库管理系统具有主动服务的功能．介绍主动数据库技术，分析了主动数据库的体系结构，并应用到天然气泄漏智能决策报警系统(NGLIAS)中，设计了该系统的基本结构，具有很强的实用性。     

基于GIS的公路选线的应用研究

GIS技术目前已经广泛地应用各个行业,为用户提供了强大的信息处理与决策支持服务。近年来,GIS技术在公路设计、公路安全方面开始得到应用,并取得了良好的效果。本文根据公路设计的实际需求,提出了使用地理信息系统(GIS)技术,建立公路路线数字高程模型(DEM)的方法。     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that