基于PDA的应用服务

介绍了基于PDA的手机网络定位或GPS定位、周边信息查询、数据统计分析等移动应用服务.它的实现方法是用移动终端PDA发送信息服务请求,通过移动通信网,GSM,GPRS,CDMA等发送到后台应用服务器,经过后台应用服务器的计算处理并返回给移动终端,获取客户感兴趣的信息服务.     

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。     

空间信息移动用户服务示范系统研究

本项目的主要研究内容是空间信息移动用户应用服务系统，包括空间信息与移动通讯终端的接口技术；移动定位技术与移动通讯、移动终端有关的信息共享技术问题等，以达到融合空间信息服务、移动通讯和定位技术在内的多种新技术，提出一个包括个人电脑、掌上电脑和手机在内的多种信息接收终端的统一的空间信息服务平台的解决方案，将空间信息与社会生活的其它信息融合到一起，为公众提供基于空间信息的多种移动服务，同时建立空间信息移动服务支持中心站示范系统。     

加强行业信息系统操作日志管理的必要性

2009年1月至5月间,北京市某市属单位财务部门在清理帐目时发现了大量的虚假记录（均通过信息系统手工补录）,给国家造成巨额的损失。市检察院反渎职侵权局介入调查,因为种种原因,无法准确定位涉嫌的终端电脑。在相关部门的配合下,笔者会同反渎局工作人员经过深入细致的了解,逐步明确了该单位及其下属单位网络架构的概况,以及相关业务管理信息系统的部署、应用、升级等相关情况。我们希望能从数据库中寻找到案发时间段内执行某些操作的终端机算机地址信息,或者从应用服务器的访问记录中查找到这些信息。但遗憾的是,应用服务器系统当时并没有开发记录访问日志的功能,后台数据库所记录的操作者地址信息全部为应用服务器的地址,信息系统本身又没有设计专门记录终端地址信息的功能。这给定位嫌疑终端电脑带来了极大的障碍,初查工作进展缓慢。     

基于PDA和无线模块的SMS程序设计

本文讨论了基于Windows CE的PDA设备串口通信,通过将PDA串口与一个无线模块相连,实现了将用户所需服务类型信息及手持终端的空间定位信息以SMS的形式发到特殊信息服务中心,并接收信息服务中心返回的SMS.本文着重介绍了SMS程序的具体编程实现.     

形式多样的基于位置的信息服务系统

基于位置的信息服务系统是根据用户所在的不同位置和用户需求向用户提供不同内容、不同方式的一种个性化服务体系。主要以GPS、LBS为核心定位技术探讨基于位置的信息服务系统的几种基本架构，这些架构综合采用Internet、移动网、专用通讯网等数据通信方式，向移动用户提供安全的与用户位置紧密相关的信息服务。基于位置的信息服务系统能够主动或被动获取移动用户的位置信息，向移动目标和调控移动终端的业务中心提供与终端位置相关的信息服务。基于位置的信息服务系统由定位系统及策略、通讯系统、信息处理系统以及地理信息数据库系统组成。     

移动政务:价值、应用与技术分析

移动政务是电子政务领域的一个新话题,它被认为是“无线通讯及移动计算技术在政府工作中的应用,通过诸如手机、PDA、Wi-Fi终端、蓝牙、无线网络等技术为公众提供服务”.移动政务不仅消除了实体政务对空间和时间的限制,还突破了传统电子政务对物理网络延展长度的依赖,它把电子政务从PC机延伸到掌上终端,从有线网拓展到无线网,从信息检索发展到信息推送,无论在理论上还是在实践中,都是重要的创新.     

专网中移动邮件推送系统的研究与实现

提出目前专网中信息化建设的现状和需求,采用无线推送技术,研究并设计移动邮件推送系统,将专网内信息系统与移动邮件推送业务相结合,使用户通过移动终端获取专网内各部门的最新信息.根据专用网内用户的特点及对移动邮件推送业务需求,建立具有四层结构的系统模型,选择适合的网络协议、业务实现方式等;结合无线网络的结构及企业信息系统特点,详细分析并阐述专网中移动邮件推送系统整体架构设计方案,完成服务器端与移动终端软件设计方案,设计后台数据管理系统.采用J2EE为开发平台,实现专用移动邮件推送系统服务器端的开发,实现企业信息的获取、信息格式转换、信息推送功能;采用J2ME开发模拟终端软件,实现模拟终端接收邮件并显示邮件内容及附件功能;采用SQL Server2000数据库实现移动邮件推系统后台数据管理系统.最后,对系统功能进行测试.     

基于GPS／GSM的个人定位系统设计

通过对GSM系统的介绍,提出利用短消息业务来实现定位信息的传送．系统采用GPS／GSM和PDA互连的移动终端来代替高性能GPS手机,通过AT指令,实现GPS数据的发送,再通过中心站的转换发送至用户,从而达到跟踪目标的目的．     

基于双模卫星定位、生命信息检测和无线传输终端的设计

设计了一套便携式终端,集GPS/BD2双模卫星定位、生命信息监测和无线传输功能为一体,由士兵随身携带.该终端以ARM作为主控芯片,采集GPS/BD2定位数据和生命体征数据,并进行数据融合,通过军用CDMA网络,以短消息方式发送至后台处理中心实时显示和处理,还可以根据后台处理中心的指令进行状态调整.设计的终端对于抢险救灾、野外搜救等都具有重要的实用意义.     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-