MPEG数据压缩标准的发展

文章简介了MPEG-1、MPEG-2、MPEG-4、MPEG-7和MPEG-21数据压缩标准的发展——MPEG技术的最新进展及其在广播影视、多媒体等信息产业方面的应用情况。     

动态视频图像MPEG标准浅析

NPEG是运动图像专家组的简称，其制定的动态图像压缩标准称为NPEG标准，包括MPEG-1、NPEG-2、NPEG-4、MPEG-7和NPEC-21。简要介绍了NPEG的发展历史，各NPEG标准的基本内容、主要技术指标、应用领域以及发展趋势。因为NPEG-4标准是基于内容的压缩标准，与以前的压缩标准有所不同，因此特别讨论了MPEG-4的一些关键技术和当前研究热点及发展趋势。     

基于MPEG-7标准的视频检索技术研究

MPEG-7标准的制定解决了多媒体内容描述的标准化问题,可满足用户对多媒体内容快速、有效检索的需求,提高多媒体内容的利用价值。本文在介绍MPEG-7标准的核心内容及多媒体描述方案的基础上重点分析了基于内容的视频信息检索关键技术及基于MPEG-7标准的视频信息检索流程。     

基于MPEG-7的现代化教育研究

MPEG-7标准主要用于对各种不同类型的多媒体信息进行标准化描述,并将该描述与所描述的内容相联系,以实现对多媒体信息快速有效的搜索。本文在论述MPEG-7核心内容的基础上,对MPEG-7在现代化教育中的应用作了深入的研究。     

MPEG-7标准及其应用

MPEG-7是国际标准化组织即将推出的新一代多媒体国际标准,该标准主要用于对各种不同类型的多媒体信息进行标准化描述,并将该描述与所描述的内容相联系,以实现对多媒体信息快速有效的搜索.在未来的多媒体信息检索服务中,MPEG-7将发挥主导作用.本文主要从标准的目标、体系结构及应用等方面对MPEG-7进行了描述.     

基于本体与MPEG-7视频语义描述模型

运用本体论原理,结合MPEG-7的视频特征描述接口以及视频语义信息的层次结构,建立一个基于MPEG-7的视频语义信息模型.利用RDFS和OWL强大的语义描述能力以及自扩展机制来描述这个模型的组织结构,克服了MPEG-7的XML schema 不能有效表达视频语义信息的缺点,从而能够在模型的基础上建立有效的语义推理引擎．     

基于MPEG-7的通用多媒体数据库模型G3M

在MPEG-7的基础上提出了一个通用多媒体数据库模型G3M,给出了模型的形式化描述.与通常的用XML数据库方案来存储和检索MPEG-7媒体描述信息不同,G3M充分利用了MPEG-7的多媒体描述模式(MDS),将多媒体数据中包含的复杂语义信息提取出来,并根据用户的兴趣在对象-关系数据库上进行建模.强大的多媒体表达能力,使得G3M能引入领域知识,为语义推理和智能化检索奠定了基础.     

VRML及其在MPEG—4中的应用

VRML和MPEG-4是两个独立的标准，但它们之间却有着紧密的联系。VRML标准先于MPEG-4发布，并对MPEG-4有着重要的影响。本在简要介绍了VRML和MPEG-4后，着重介绍VRML在MPEG-4中的应用。     

视频对象分割技术的研究

叙述了采用视频标准MPEG-4和MPEG-7进行视频分割技术的一些基本概念和常用的分割方法,同时针对每种方法的优缺点进行了分析,并对发展趋势进行了展望.     

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.     

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     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with