数据冗余

但是XML有个致命的缺点：结构数据冗余。

However , there is a fatal disadvantage of XML , that is data redundancy of the structural data .

为解决历史关系模式中存在的数据冗余、TNF异常等问题奠定了基础。

This is the basis for resolving data redundancy and TNF abnormal in the historical relational scheme .

XML文档中可能包含由非函数依赖引起的数据冗余和操作异常。

XML documents may contain data redundancies and operation anomalies due to non-functional dependencies .

消除数据冗余的XML模式设计方法

Design of XML-Schema for Minimizing Data Redundancy

CBR系统中实例库数据冗余的解决

A Way to Solve Data Redundancy in CBR AI System

用ADD对多值图像进行建模，可以有效降低数据冗余，然后对ADD模型进行有效的编码，可以达到数据压缩的目的。

Treating a multi-level image with ADD can considerably reduce the redundancy . The ADD can then be encoded efficiently for the image to be compressed .

这三种机制都增加数据冗余来提高WSN的可靠性，但它们给WSN带来了不同程度的传输能耗开销。

These three mechanisms provide data redundancy in different ways to improve the reliability in WSN .

XML模式是XML应用的基础，同传统数据库一样，不合理的XML模式设计也会导致数据冗余和各种操作异常。

XML schema is the foundation for XML application , and improper XML schema may cause data redundancies and operational abnormalities which is similar to that in traditional database .

由于XML固有的数据冗余等特性，使得解析XML文档成为应用中代价很大的一个环节。

Because of the nature of XML data with redundancy inherent in some of its features , the processing of XML documents takes a large part of the cost in applications .

该模型可以较好地保持特征实体的完整性，数据冗余较少，适合于在现有的GIS软件中组织时空数据。

This model has the advantage of keeping the integrality of feature entity and less data redundancies , and is easy to organize the spatio-temporal data in the traditional GIS .

XML相关规范提供了严格的语法限制，相反对语义限制提供得很少，缺乏约束表达能力，导致实例文档会出现数据冗余和不一致问题。

While providing strict syntactic constraints , the related XML specifications provide little semantic content , and lack the ability of constraint expression . It results in the redundant and inconsistent data .

感兴趣区域（RegionofInterest，ROI）压缩编码在消除数据冗余性的基础上，从图像的内容出发对图像进行压缩编码，这对遥感图像的压缩尤为重要。

Region of interest ( ROI ) based coding compression algorithm , which is very important for the remote sensing images , depart from the content of images to elimination of redundant data .

但它的自描述和半结构化特性使得XML中存在大量的数据冗余，极大地增加了数据存储、交换和处理的代价，严重阻碍了XML数据库更深入更广泛的应用。

However , its self-describing and semi-structured feature introduces the verbosity of XML documents and increased the cost of storing , exchanging and processing , which hinder the wider and deeper use of the XML database .

但STL文件格式存在着一些缺陷，比如大量的数据冗余。

So far , STL as the standard interface file is widely used in RP system , but some flaws exists such as data redundancy .

本文主要研究了分布式文件系统的数据冗余技术。传统的分布式系统大多采用独立磁盘冗余阵列（RAID）和复制技术进行数据的冗余，要达到一定的可靠性对存储空间的要求较高。

Reaching certain reliability requires a high storage because most traditional distributed systems execute data redundancy using redundant array of independent disk ( RAID ) and replication technology .

本文对P2P存储技术的几个基本方面&资源搜索、数据冗余和数据查询作了初步的研究，并在此基础上设计并实现了一个基于P2P的分布式存储系统。

It did not mature system for commercial users . This paper does some preliminary research on the basic aspects of P2P based storage technology including resource search , data redundancy and data query . 1 .

介绍了采用CRC校验与多重数据冗余结合实现RAM、EEROM数据纠错的方法。

This paper introduces a method of rectifying data in RAM or EEROM , which makes use of CRC and multiple data redundancy .

本系统采用E-R图法进行规范化设计使得数据冗余最小，数据一致性好，更新异常问题不易发生。

This system used E-R chart method to design in order to minimum data redundancy and optimize data consistency and reduce updating abnormity .

分析当前流行的XML-Schema设计方法。针对XML文档存在数据冗余的现象，改进了设计方法，提出基于E-R模型的实体加权算法。

This article compares and analyzes the currently exiting approaches of designing XML-Schema , and presents an entity-weighted approach based on E-R model to improve those approaches .

文件RAID是一种新型的数据冗余技术。在文件RAID，文件系统通过自己管理多重磁盘，把数据冗余存放在分离的磁盘上，提高RAID能力。

File RAID is a new technology of data redundant , in file RAID , the file system manages multi-disks and places user data over separate disks redundantly by itself , hence improve the RAID ability .

分析和实验均表明，本文的分发方案可以用更少的数据冗余度确保数据的目标可用性。（3）基于误判和漏判抵消的节点永久离开判别器PROTECTOR。

Experiments and analyses show that the new strategy guarantees the desired availability by using much less redundancy . ( 3 ) PROTECTOR , a permanent departure detector based on the balance of false positive and false negative .

为消除DDST信号检测的错误平层，论文又提出一种信号编码算法并给出了该算法数据冗余率的表达式。

To remove the error floor , a data coding method is also proposed and the redundant ratio of the coding algorithm is given .

在目前的快速成型系统中，普遍采用STL格式文件来表达CAD模型，因而在切片后截面轮廓含有大量的数据冗余点，影响了插补加工的精度和效率。

STL format file is usually utilized to CAD model in present rapid prototype manufacturing ( RPM ) system . Thus , the sections of RPM model include plenty of redundant data after slicing , which effects the precision and stability of following interpolation and manufacturing .

由于具有节点能量有限、网络规模大、数据冗余度高、运行环境恶劣等特点，无线传感器网络数据链路层的设计不同于传统的无线宽带络和adhoc网，需要重新设计路由协议。

As with specialty of limited node energy , massive network , high data redundancy , bad conditions and so on , the DLL ( data link layer ) of WSNs , which is different from conventional wireless broadband and Ad Hoc networks , needs to redesign routing protocols .

该方法结合MLS下采样技术，根据局部采样率、局部曲率特征，自适应地合理选择下采样率，有效解决了数据冗余问题，并去除了部分噪声。

The method combines with the MLS down-sampling method , according to the local sampling rate , the local curvature characteristics , chooses a reasonable down-sampling rate to reduce data redundancy and to remove some noise . 2 .

PASIS架构将分散式存储系统、数据冗余和编码技术以及动态自维护技术相结合，创建了生存力强的信息存储技术。

PASIS architecture combines decentralized storage system technologies , data redundancy and encoding , and dynamic self-maintenance to create survivable information storage technology .

介绍由MCS-51单片机实现的存储式油井快速测试系统的原理，重点介绍了数据冗余保护电路和快速采样电路，实现了在高温、高压环境下参数的快速采集。

This paper presents the principle of stored oil well rapid test system realized by MCS-51 , places emphasis on data redundancy protection circuit and fast sampling circuit . So the rapid parameter sampling is realized in high temperature , high pressure situations .

最后，本文采用OPNET进行协议仿真，仿真实验表明，改进协议明显减少了数据冗余度，降低了数据冲突率，端到端延时也明显缩短。

At last , the paper will simulate the performance of the proposed protocols with OPNET . The results show that the proposed protocols obviously reduce the data redundancy , the rate of data collision and the delay of end to end .

由于没有采用有限Randon变换实现脊波的数字化，它能彻底消除环绕效应，融合的效果也能得到进一步改善，但是引入了数据冗余。

Since this algorithm avoid using finite randon transform to discretize ridgelet , this digital ridgelet transform can thoroughly eliminate " wraparound effect ", thus achieving better fusion results , but it also brings in data redundancy .

由于接入的访问移动节点（VMN）数量巨大，在列车运行环境中需要频繁的进行子网切换，且无法判断接入设备的服务次数的时间，有很大的数据冗余。

Because the number of visiting mobile nodes ( VMN ) is huge , the change of subnet in the train mobile environment is frequent and the number determine of the accessing times of VMN is hard , huge data redundancy will be brought about .