地理信息系统在考古学中的应用研究

回顾了考古GIS在国内外的研究现状,阐述了考古GIS的主要研究内容;从考古遗址预测模型的发展出发,系统地总结和分析了目前所使用的各种遗址预测模型的理论与方法,并对地理信息系统在考古中的具体应用进行了详细的分析.     

云计算技术与网络GIS技术的探究

云计算是近两年计算机领域发展起来的热点技术之一。它把一切IT资源都抽象为服务,用户通过网络来使用这些服务,从而实现按需计算和多人协作。GIS作为一种采集、存储、管理、分析、应用地理信息的计算机系统,现已经融入IT技术主流。在GIS领域,有必要采用云计算技术,构建云地理信息系统,以便简化GIS应用程序部署和管理、降低GIS投资和运行成本,提高GIS应用程序和基础设施的灵活性。本文将云计算技术应用到地理信息系统领域,对云计算在网络GIS领域中的应用模式进行了研究。     

GIS与GPS技术及集成发展

1 GIS GPS 的含义和特点1.1 GIS 地理信息系统 GIS 地理信息系统是反映人们赖以生存的现实世界资源与环境的形势和变迁的各类空间数据及描述这些空间数据特征的属性数据在计算机的软件和硬件支持下以一定的格式输入存储检索显示输出和综合分析应用的技术系统地理信息系统主要有四个组成部分既操作对象用户被操作对象软件系统和数据以及装载软件和数据的硬件系统其中软件系统和数据是地理信息系统的主要组成部分用户借助于硬件系统进行操作得到所需的结果这四个部分关系如下地理信息系统以数据来描述自然世界和各种社会现象从而满足人们…     

面向用户的GIS解决方案利弊分析

GIS用户化的理念已由最初的用户界面定制发展到如今的面向特定领域用户的IS设计,本文以面向用户的GIS解决方案为研究对象,通过对GIS当前在不同应用领域和方向的剖析,探讨了地理信息系统用户化的现状,需求,分析了地理信息系统用户化的利弊,相信对从事相关研究的同行能有所裨益。     

GIS在机场道面管理系统中的应用

以地理信息系统 (GIS)的技术原理和一般实施过程为依据 ,结合机场道面管理的特点和要求 ,在分析总结国外先进经验的基础上 ,完成了上海机场道面管理地理信息系统的管理单元划分、空间实体分层组织、空间数据库建立与维护 ,以及系统软件的GIS功能设计等重要内容 ,可作为我国机场道面管理系统开发的技术基础 .基于GIS的机场道面管理系统将为用户提供多层次、可视化的道面信息和强大的管理决策功能     

规划设计中的给水管网计算方法的改进

通过引入地理信息系统(GIS)技术,以街区作为管段沿线流量的计算单位,考虑街区面积、人口密度、街区内部大用户用水量等各项因素,改进了给水管网的计算．结果表明：GIS技术可使整个给水系统工作状况更接近实际。     

XML的WebGIS实现模型及其数据共享

信息共享是Internet应用的本质要求。开放性与共享性也是webGIS的发展方向．文中根据GIS的特点,针对HTML的缺陷,把XML技术引入到WebGIS中,讨论基于XML的WebGIS实现模型。研究利用XML技术在Web上实现GIS数据共享的方法,并给出应用实例．     

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。     

地理信息系统与信息技术的融合

针对地理信息系统(GIS)与信息技术融合问题,从地理信息系统与信息技术逐步融合的过程方面,阐述了地理信息系统的发展和变化不仅基于一系列基本的GIS特性,而且还依赖于、受制于信息技术(IT);说明了GIS的发展历程是一个与主流信息技术逐步融合的过程,基本反映了信息技术的总体发展过程.GIS与数据(仓)库技术、网络技术、虚拟现实技术、人工智能技术和通信技术等的进一步融合是当前GIS发展的趋势.     

地理信息系统（GIS）在减轻地震灾害中的应用

地理信息系统(Geographic Information Systems,简称GIS)是处理空间信息的重要工具。目前GIS技术广泛应用于地震分析预报、地震灾害预测和辅助决策、地震区划等地震学研究领域。本文介绍了地理信息系统(GIS)技术,并在此基础上讨论了地理信息系统在防震减灾中的应用。     

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