分布式农村供水网络监控系统设计

湖南地处丘陵地带，农村供水具有集散分布式的特点，该条件下农村供水复杂、供水质量差；针对供水不稳定、可靠性差等问题，设计出一种基于计算机远程分布式网络控制的远程监控与管理系统、     

基于ORBUS时间系统的网络时间同步

时间同步在分布式计算机中起了很大的作用,分布式中计算机对计算机的可靠性与精确性要求很高。关于NTP/SNTP协议是基于ORBUS时间系统的,它是一种在网络时间上同步的组织方式。这种协议可以使得跨网段时间同步节点数降低,而且也可以减少网络方面的开支等等,本论文对NTP网络时间同步系统进行了详细的分析,研究的NTP协议可以应用于繁琐分布式网络,相比于其他的协议,NTP协议的这种同步方式要在网络时间同步中的应用需要在精度、稳定性方面加以提高。NTP/SNTP协议本身具备的网络时间同步组织方式在分布式网络中有着很好的适用性。     

面向事件的离散时间的网络并行模拟方法

提出了一种分布式并行模拟方法，它在多用户的计算机工作站上实现了面向事件的离散时间的网络模拟。通过不同模拟方法和网络模型的分析比较表明，在离散时间环境下的网络拓扑逻辑的并行计算模拟是一种快速、高效方法     

分布式电话计费网络的可靠性设计

叙述了可靠性工程在分布式电话计费网络系统设计阶段的应用，提出了可靠性工程的基本任务和要求，运用可靠性原理对电话计费网络进行了可靠性分析、设计和优化。     

北京公交智能调度系统的网络设计及性能分析

在分析北京公交智能调度系统需求和对当前几种先进的计算机网络技术进行比较的基础上，给出了北京公交计算机网络的设计方案．同时，对所设计的网络进行了ＲＡＭＳ性能分析．通过分析，可以证明该网络设计合理，技术先进，具有较高的可靠性和实用性．     

基于CAN总线的汽车检测线计算机控制系统

控制器局域网络是一种能有效支持分布式控制或实时控制的串行通信网络,具有高性能和高可靠性的特点。文章介绍了一种基于CAN总线,以嵌入式系统为工位机的汽车检测线计算机控制系统,详细论述了该计算机控制系统的结构,着重分析了系统的硬件设计和软件设计;该方案成本低,可靠性高,能更好地满足汽车综合性能检测的实际需要。     

提高计算机网络可靠性的方法研究

计算机网络的普及,使人们的社会生活变得更加便利。同时,但是对于计算机网络的可靠性,我们更多人保持着中立的态度。对于计算机网络技术功能的完善以及计算机网络范畴的扩充,我们需要做的是在可靠性的程度上提出一种全面升级化的方案。生活水平和质量的上升,将计算机网络的需求量推动到一定的高度,计算机网络是否可以稳定运行已然成为了人们重点关注的内容。该文就计算机网络可靠性展开具体的分析,将其问题分解成几种因素,然后针对影响因素分析得出几种算法可以使上述因素得到控制,进而提高计算机网络可靠性的方法研究。     

基于负荷分类评估的配电网可靠性分析方法

快速准确的可靠性评估技术对提高配电网运行水平至关重要.本文在传统配电网可靠性评估基础上,针对具有快速转供功能的含分布式电源配电网,提出了一种基于负荷分类的可靠性评估方法.该方法基于概率和抽样方法确定系统运行状态及故障或失效发生地点,将配电网分为不同类型的负荷进行分析,并考虑了含分布式电源情况下的网络重构和负荷转供等功能.该方法有效地简化了传统可靠性评估过程的复杂性,提高了分析效率,能应用于配电网的实时可靠性评估.采用改进的IEEE-RBTS Bus6系统验证了所提模型及方法的可行性.     

基于失效树的多计算机体系可靠性分析

多计算机体系采用全局共享虚拟地址空间的分布式存储器的MIMD(多指令流多数据流 )构型。基于失效树对多计算机体系的可靠性进行分析。提出了一种计算失效概率的逼近算法     

浅析网络办公自动化系统的构架设计

随着计算机网络技术的进步，办公自动化网络的建设也得到了大力推广。本文介绍了当今计算机网络办公自动化系统的分布式模型，论述了系统中提供支持的通信协议、数据库系统、多层次结构和中间件技术以及具体实现方法。     

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