基于DMB-TH的数字电视机顶盒EPG的设计与实现

电子节目指南(EPG)功能强大与否已经成为数字电视机顶盒能否占领市场的关键.本文阐述了基于DMB-TH标准的数字电视机顶盒系统构成,提出了一个基于此的EPG系统的实现方案.以LGS-8913和STM5105为主要硬件平台,将整个系统分为3个功能模块:EPG信息的提取和解析、EPG信息的存储和OSD界面的显示.系统通过模块化的设计实现了EPG软件的显示功能并增强了数据操作的灵活性,起到了很好的效果.     

移动数字电视机顶盒设计

目前.有线电视早已普及,而移动数字电视还处于发展阶段.为此,本文设计了一种DMB-TH地面数字电视机顶盒,即移动数字电视机顶盒.首先,介绍了硬件设计方案,其中主芯片采用ST公司出品的STM5105,该芯片具有主频高、反应速度快等优点.其次,详细介绍了红外接收模块、OSD模块、频道搜索模块和解复用模块等模块的软件设计,由于采用了快速检测频道搜索的反馈信号、短时间内强制退出搜索子系统等创新技术,使频道搜索速度和频道切换速度大为提高,该机顶盒能够成功地播放广电发送的地面数字电视.     

在Cable Modem中升级BootLoader

在Cable Modem系统中,Cable Modem的应用软件存储在flash中,Bootloader是系统开机后最先被执行的一段程序,它除了对一些必要的硬件设备进行初始化,还要负责解压缩并引导起Flash中的可执行Image.当在Cable Modem使用了新的压缩算法或flash的存储结构发生了变化时,就需要对BootLoader进行升级.本文着重介绍了在Cable Modem系统中实现的升级BootLoader的方法.     

基于单程序多数据流并行软件的性能预测法

为了提高预测并行软件性能的准确性和并行软件的开发效率,提出了一种基于单程序多数据流(SPMD)并行应用软件模块化技术的性能分析预测和并行软件辅助开发方法.通过量化计算开销、通信开销、通信与计算的耦合系数,阐述了在并行计算机系统中利用该方法开发并行计算软件和预测并行计算软件性能的过程.并就影响并行软件性能预测和开发效率的模块设计、模块性能数据建模、模块组合和计算与通信重叠等技术进行了研究.实验表明,该方法提高了预测并行计算软件性能的准确性,也提高了并行计算软件的性能和开发效率.     

学习反应信息系统异步实时测试软件设计

本文介绍一种基于学习反应信息系统的核心应用软件——异步随机实时测试与分析软件的设计，主要论述了系统的一般设计、软件的结构、软件各模块的功能与实现等问题，该应用软件已在实际的教学环境中实施过，取得了良好的应用效果。     

基于LabWindows/CVI的数据处理系统设计与实现

虚拟仪器系统是目前工业测试技术中新兴的系统,本文针对人工增雨火箭发动机试验数据设计了一种功能强大的数据处理系统,详细介绍了基于LabWindows平台利用C语言进行仪器程序设计的方法,利用不同的软件模块实现不同功能,开发成本低、开发周期短、升级和维护容易,而且用户可以根据需要进行扩展,方便实现人机交互。     

基于嵌入式Linux平台的KTV点歌系统机顶盒的设计

机顶盒系统是一套基于更安全、更稳定的要求开发完成的并已被许多娱乐场所选定使用的、可靠性高、安全性好的全自动卡拉OK点歌系统.本文从机顶盒的软硬件设计和支持系统的平台选择、到前台软件的设计方案,来阐述了一款基于嵌入式Linux平台的KTV点歌系统机顶盒的设计过程.希望对部分机顶盒设计开发者有一定的参考价值.     

基于嵌入式Linux平台的KTV点歌系统机顶盒的设计

机顶盒系统是一套基于更安全、更稳定的要求开发完成的并已被许多娱乐场所选定使用的、可靠性高、安全性好的全自动卡拉OK点歌系统.本文从机顶盒的软硬件设计和支持系统的平台选择、到前台软件的设计方案,来阐述了一款基于嵌入式Linux平台的KTV点歌系统机顶盒的设计过程.希望对部分机顶盒设计开发者有一定的参考价值.     

基于嵌入式系统的膀胱肿瘤热灌注治疗仪

研制了一种用于膀胱肿瘤治疗的药液循环灌注控温治疗仪.文中首先介绍了膀胱肿瘤热疗的原理与国内外研究现状,然后构建了以膀胱杯模拟人体膀胱的治疗仪仿真系统,并基于嵌入式微控制器进行了治疗仪控制系统的硬件设计,进而给出了治疗仪控制系统的软件设计,包括基于μCOS-II的软件架构设计、温度检测与控制等应用软件模块设计、基于μCGUI的图形人机界面设计.最后,阐明了治疗仪仿真系统硬件测试和软件调试的步骤与方法,并指出了后继工作值得注意的问题.     

手机多媒体增值业务实现方案的探讨

根据国内外手机多媒体软件的发展现状,提出了一套基于Symbian OS的手机多媒体应用软件解决方案。介绍了系统平台的总体构架设计,描述了该框架的客户端、服务器以及通信模块三大模块,重点分析了对客户端平台的UI模块,媒体播放模块,通信模块。     

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