智能天线技术在3G移动定位技术中的应用研究

本文讨论了3G移动定位技术,智能天线技术使得系统对3G系统中移动终端进行定位更加简单。通过上行同步接入过程可以确定基站和移动终端之间的距离,与DOA估计相结合,能够精确地估计出3G系统中移动终端的具体位置。最后对MUSIC算法进行了仿真分析。     

移动GIS定位关键技术研究

随着移动智能终端的发展,GIS呈现出由桌面化向移动终端发展的趋势,移动定位具有了广阔的市场。但是目前的定位技术对于室内等非开阔地带的定位具有极大的局限性。探讨了智能手机终端的定位原理和各自的特点。分析了室内定位面临的问题。     

移动GIS在旅游景点定位实时查询中的应用研究

如何利用移动终端获得实时的旅游地理信息并浏览查询成为移动GIS的一个热门研究方向。介绍了移动GIS和Mobile Widget,采用Mobile Widget技术,实现移动GIS在移动终端上旅游景点的实时浏览查询。以西藏布达拉宫为例,通过移动终端实现快速、准确的景点定位,满足浏览数字地图的实时需求。     

移动定位技术概述

基于移动网络的定位技术不需要更换用户手机,成本低,易于推广,但精度较低。基于终端的定位技术提高了定位精度但需要更换手机,增加了使用成本;基于卫星的定位技术,需要专用的终端接受设备,但精度高,覆盖面积大,应用范围广。     

西部测图移动GIS安全自救保障系统关键技术

为解决西部测图安全自救保障所必需的海量移动地理空间信息服务与移动PDA终端弱硬件资源、弱计算能力相矛盾的问题,采用试验的方法,研究了在PDA移动终端实现快速海量移动地理信息服务的可行性。结果表明:在"卡片式"数据索引的基础上进行"刀片式"数据组织管理的数据模型是一种有效的移动终端数据组织模型;在层次化空间格网索引的基础上,地理空间信息分割是解决硬件资源有限性的一种现实有益方法;移动安全自救被动定位是有缺陷的,必须有终端链路上传通道才有效。该系统的研发应用表明该成果对于普遍性的移动安全应急救援保障系统建设具有现实的借鉴意义。     

移动互联网环境下的科技期刊App化的应用价值

随着移动互联网快速普及覆盖面增加和移动终端流行的引发智能移动终端网民数量的快速增长,App的应用覆盖了游戏软件等多方面以满足人们的生活正常需要,基于这些原因,从期刊App概述及期刊App特点两方面,讨论了移动互联网环境下的的科技期刊App化的应用价值.     

3G时代移动阅读终端探析

3G时代无线移动阅读已不存在技术上的难题,但如何使无线移动阅读模式得到更广泛的普及,是值得研究的重要问题。阐述了移动阅读的概念及优点,介绍了移动阅读终端的发展概况,对现有移动阅读终端进行了比较,讨论了3G时代新型移动阅读终端GQ的设想及其工作原理,并就如何实现移动阅读终端的特性要求做出探析。     

双模移动终端定位方法分析

本文讨论了现有的移动终端定位方法,分析了它们的优缺点,然后结合TD-SCDMA/CDMA2000双模终端自主定位的特点,分析了两种双模终端定位方法。     

移动数据库技术在移动终端中应用初探

随着各类移动终端的广泛应用，移动数据库技术的应用也越来越广泛。文章首先简述了移动数据库技术的内涵和几个关键技术．然后分析了移动终端在实际应用过程中所面临的技术瓶颈，最后进一步给出移动数据库应用于移动终端时，亟待解决的若干技术和标准。     

基于WAP的移动学习系统

为解决移动终端负荷重及功能操作复杂的问题,应用3G技术,提出一种基于WAP(Wireless Application Protocol)的移动学习系统,给出了该系统模型的设计思想及体系结构,例析了系统各模块的主要功能,并讨论了系统设计与实现所涉及的关键技术与环境。该系统为用户提供“傻瓜”式的移动学习服务奠定了基础,有效解决了网络拥塞问题,同时也为构建真正以用户为本的,“胖服务器、瘦终端”的移动学习系统带来了可能。     

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