数据

In this paper a discretization algorithm based on importance of cut point. Firstly, the paper gives some concept of rough set theory:decision table,indiscernible relation,information entropy and condition entropy.

粗糙集理论可以用在数据挖掘的各个阶段，该文研究了粗糙集理论在数据挖掘的数据离散化阶段的应用，并提出了一个新的决策表离散化算法。l 基本概念及离散化问题的描述定义1 。

Then, considering the knowledge represented by a set of frequent patterns, we investigate the problems of preserving sensitive patterns in data sharing, hiding sensitive patterns in frequent pattern sharing, and also blocking inference channels in frequent pattern sharing. The main contributions are as follows:(1) For the problem of preserving anonymity in data sharing, we propose a clustering-based approach for implementing l-diversity.

本文首先研究了数据共享中匿名保护问题，接着以频繁模式为知识的表现形式，研究了数据共享中的敏感模式保护，频繁模式共享中的敏感模式隐藏，以及频繁模式共享中的推理控制等问题，主要的研究成果如下：(1)针对数据共享中的匿名保护问题，提出了一种基于聚类的l-多样化实现方法。

Then, considering the knowledge represented by a set of frequent patterns, we investigate the problems of preserving sensitive patterns in data sharing, hiding sensitive patterns in frequent pattern sharing, and also blocking inference channels in frequent pattern sharing.

本文首先研究了数据共享中匿名保护问题，接着以频繁模式为知识的表现形式，研究了数据共享中的敏感模式保护，频繁模式共享中的敏感模式隐藏，以及频繁模式共享中的推理控制等问题，主要的研究成果如下：（1）针对数据共享中的匿名保护问题，提出了一种基于聚类的l-多样化实现方法。

With rapid development of information technology, a kind of infinite sequence data is generated in many areas.

中文摘要随着信息技术的飞速发展，许多领域产生的数据是在时间维度上严格有序、在数值上不断变化的无限的数据序列，由此产生数据流模型。

A data stream is a continuous, huge, fast changing, rapid, infinite sequence of data elements.

流数据是一种持续的、有序的、不断变化的、快速的、数据量巨大的数据形式。

Each message travels as a packet that contains information about the source and destination machines as well as message data.

每个消息以数据包的形式传输，数据包中包含源计算机和目的计算机的信息以及消息数据。

This article emphasizes on the algorithm of data input, data split and data display.

本文着重论述了如何输入数据、分割数据和显示数据的算法。

Comparisons reveal that: plan of GSM Modem is fit for circumstances of low communicating frequency , insensitiveness of data delay and low cost; plan of GPRS DTU adapts to occasions of high communicating frequency, low delay, large data flow and restrict requirement of security.

比较的结果表明，GSM Modem方式适合于通讯频率小，数据延迟不敏感，费用低的场合；GPRS DTU方式适合于通讯频率大，数据延迟小，数据量大，安全性要求高的场合。

The bit inserter includes a delay for delaying the received data bit stream by the number of the specific bits to be inserted; and a selector for connecting, upon completion of receiving data bits for the subframe, the received data bits to the delay and applying an output of the bit generator to the turbo coder; and applying, when the specific bits are inserted, an output of the delay to the turbo coder.

位插入器包括：将接收的数据位流延迟待插入的特定位数量的延迟器；和选择器，在接收用于子帧的数据位完成时，将接收的数据位连接到延迟器上，并将位发生器的输出施加到快速编码器；和当特定位被插入时，将延迟器的输出施加到快速编码器上。

In order to investigate and develop advanced flight simulator with high fidelity and provide the simulator with actual and reliable navigation data, the data structure requirements of navigation database for the system of flight simulator prototype are presented. These requirements including the airport, runway, very high frequency omnidirectional radio range, instrument landing system, distance measuring equipment system, nondirectional beacon and marker beacon.

为了研究开发高逼真度的飞行模拟器，并为之提供真实可靠的导航数据，提出了飞行模拟器原型系统导航数据库的数据结构要求，即机场、跑道、甚高频全向信标、仪表着陆系统、测距仪系统、中波导航台和指点信标的数据结构要求。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐