基于数据脑的神经图像元数据立方体构建技术

元数据是神经图像数据库研究的一个关键问题.然而现有神经图像元数据的信息组织形式过于单一,难以支持面向系统化脑信息学研究的分析型数据信息查询.元数据立方体的构建能很好地解决这一问题.本文提出一种基于数据脑的神经图像元数据立方体构建技术.参考现有数据立方体构建技术,定义了新型的神经图像元数据立方体,即源立方体,并设计了其基...     

数字图书馆的元数据检索技术的研究与实现

文章首先介绍了当前数字图书馆的定义．元数据的重要性．结合我们研究所承担的某高校数字图书馆项目的实际情况，详细分析了都柏林核心数据的特点．设计出了数字资源的元数据结构和基于元数据的检索系统。     

组件式数据抽取工具的设计与实现

结合数据抽取处理的多源性、数据预处理功能的集成、数据抽取处理描述信息的重用等特征，讨论数据抽取事务逻辑划分及组件包设计。给出数据抽取包的定义、包的逻辑结构及可视化管理工具设计。提出用元数据生成数据抽取包，用DTS包作为数据抽取包的执行载体的方法，以提高数据传输性能和简化系统实现。     

基于XML的企业内容管理模型

XML（eXtensible Markup Language）是针对包含结构化信息的文档而设计的一种标记语言,能够帮助不同个人和组织定制自己的标记语言的语言,定制后的标记语言可以用于特定的应用领域中实现信息数据的交换。基于XML的内容管理系统的主要特点就是内容“块”仅仅由数据组成（例如文本、图形、表格等）,而针对元数据定义的表示信息单独保存,在递送元数据信息的同时提供样式信息的处理方式,这意味着通过数据管理系统所管理的信息可以很方便地满足不同目标的需求。设计了基于XML的企业内容管理模型,提出了此类系统需要解决的需求,并予以实践证明。     

管材自动化生产元数据管理系统的设计与实现

元数据是“关于数据的数据”。使用元数据可以描述数据的内容、质量、状况和其他特性的信息,并对信息资源进行有效的管理。文中就胜利油田孚瑞特公司为应用背景,首先对管材自动化生产进行元数据的分类;其次,通过定义管材自动化生产元数据提取的规则对元数据进行提取,并以PE管材自动化生产为例进行说明;最后,进行管材自动化生产元数据管理系统的设计与实现。实践表明,基于元数据管理的管材自动化生产系统可以有效地管理管材自动化系统的海量数据,可以方便地进行监控数据查询、通过少量指标了解实际的生产情况,有助于提高过程的控制及操作水平、提高产品质量、影响研发经营发展战略的制定。     

土地空间元数据库管理信息系统的设计与研究

土地信息数据量大，数据结构复杂多样，只有建立完善的元数据库及其管理体系才能方便地进行数据的应用、交换、分发和共享．本文从元数据的概念和作用人手，分析了元数据标准的现状，提出了符合土地信息实际情况的元数据内容，进而讨论了土地空间元数据管理系统的数据存储模式和功能设计．     

浅谈地理信息元数据的设计

地理信息元数据是关于地理相关数据和信息资源的描述信息.本文通过对地理信息元数据确定的原则,元数据的主要内容与设计,元数据的组织与管理模式几个部分,浅谈地理信息元数据设计应注意的方面。地理信息元数据的设计使用,帮助人们有效地定位、评价、获取和使用地理相关数据。     

HANDY集群文件系统

针对当前集群文件系统缺乏动态扩展性和高可用性的不足,提出了一种基于逻辑矢量环结构的集群文件系统HANDY.系统利用逻辑矢量环实现动态扩展和资源的动态管理,采用了分布式元数据管理策略,引入邻接复制技术实现元数据的容错,通过可定制的数据存放策略满足不同应用的数据存储需求.测试结果表明,基于环状结构的系统HANDY具有良好的动态扩展性和高可用性.     

基于元数据的检察机关与政法部门信息共享方法研究

基于元数据的检察机关与政法部门信息共享方法研究是分析检察机关信息共享实际业务,提出并建立基于检察业务信息共享实际的元数据字典,在元数据字典的基础上建立数据交换平台,对各单位提供交换数据进行检测、清洗、分类、入库,对各单位交换请求进行数据相应.数据交换平台负责对元数据进行存储、管理和共享,同时广播发布交换数据格式,对各单位应用系统提供信息资源共享接口.系统交换平台根据各单位数据交换内容定义各元数据实体,通过元数据实体提取中心库的元数据信息,生成相应交换数据包.为确保数据安全性,系统平台对各交换数据包采用3DES加密算法进行加密控制,防止系统数据泄密.     

对象存储系统的合作缓存方案

结合对象存储系统的数据访问模式,综合设计客户端和元数据服务的缓存,构造存储系统的合作缓存方案.该方案将客户端和元数据服务器的缓存作为整体进行设计,以达到提高缓存利用率的目的;通过缓存准入策略合理选择数据传送模式,减少数据传送的通信量;同时,合作缓存方案根据数据对象的大小、访问成本和网络负载动态地调整缓存策略,提高存储系统的服务质量.实验显示,合作缓存方案能较好地适应不同的工作负载,有效提高了系统的输入输出性能.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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