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Description: 符合iso14443标准的非接触式卡片和读卡器测试标准 ISO_IEC10373 标准全集，包括ISO_IEC10373-1至ISO_IEC10373-7 和 ISO_IEC10373-6的5个增补协议。
规定了天线场强等的测试方法-Meet iso14443 standard non-contact cards and card reader standard test criteria ISO_IEC10373 Complete Works, including ISO_IEC10373-1 to ISO_IEC10373-7 and ISO_IEC10373-6 Supplemental Agreement 5. Provisions of the antenna field test method such as
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Author: 龙一 |
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Description: 本文首先研究了IsO／IECl8000．6标准中A、B两类短程通讯的前向链路与返回
链路的数据编码方式，对(FMO)双相间隔编码、(PIE)脉冲间隔编码、曼切斯特码
的编解码方式和技术参数进行了深入的分析，并利用FPGA实验平台对这三种编
码的编、解码电路进行了设计和仿真。然后对UHF RFID系统的差错控制技术原理
进行了探讨，重点研究了ISo／IECl8000．6标准中采用的数据保护与校验技术，即
循环冗余校验(CRC)技术。分析了基于线性反馈移位寄存器(LFSR)实现CRC的电
路，从理论和实现两个方面对其中存在的问题提出了解决办法，设计了一种改进
型线性反馈移位寄存器电路来实现循环冗余校验。对于要求CRC运算速度高的系
统，本文利用了递归的算法设计了一种新型的并行CRC电路。最后本文提出了一
种新颖的UHF RFID系统数字基带电路，区别于一般数字基带电路的地方是：在编
解码模块和CRC模块之间加入了卷积编码和维特比译码模块。利用卷积码优良的
纠错能力，来解决UHF RFID系统在电磁干扰严重的环境中识别率低、通信速度慢
的问题，效果良好。-The first，this paper investigates the f．0rward link and retum link data encodlng
method in short range communication types A and B in ISO／IEC 1 8000-6，and deeply
analyzes encoding method and technical parameters of Bi—Phase Space(FMO)coding，
Pulse IntervaI Encoding(PIE)coding and Manchester coding．We also designed and
simulated code circuits and decode circuits of the three encoding method by FPGA
experiment platfoml． The second， We discussed the technical principle of error
control of the UHF RFID system，especially for the techn0109y of data Verification
肌d calibration，namely cyclic redundancy check that used in IS0／IEC 1 8000·6·The
circuits of CRC based on Linear Feedback Shin Register(LSFR)are analyzed行om
theonr and realization，and some means of solVing problems are put fon)Irard，then an
improved LSFR circuit to implement CRC is designed．For some require fast CRC
calculation system，we designed a noVel parallel CRC circuit by using recurslVe
fomlula．In the end，we put forw
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Author: HY jian |
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Description: MPEG(Moving Pictures Experts Group) 系列标准由ISO IEC 制订, 是计
算机多媒体应用最广泛的国际标准之一.MPEG 音频作为标准的重要内容, 其发展经
历了内容表示、内容描述以及互操作应用框架等阶段. 然而, 作为支撑技术, 更高效的
编码方法和更精确的描述手段仍然是当前研究工作的重点. 综合分析了MPEG 系列
标准中音频技术的现状, 并提出和讨论了进一步研究中需要解决的若干技术问题.-MPEG (Moving Pictures Experts Group) series of standards developed by the ISO IEC, is the computer multimedia applications one of the most widely used international standard. MPEG audio as an important part of the standard, its development has gone through the contents of that description and application frameworks, interoperability stage. However, as a supporting technology, more efficient coding methods and more accurate description of the work means is still the focus of current research. comprehensive analysis of the MPEG family of standards in the status of audio technology, and presented and discussed in further research need to be addressed Several technical problems.
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Author: Allen |
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Description: These materials are subject to copyright claims of International Standardization Organization (ISO), International
Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council
(ITI). Not for resale. No part of this publication may be reproduced in any form, including an electronic retrieval system, without
the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW,
Washington, DC 20005.
Printed in the United States of America-These materials are subject to copyright claims of International Standardization Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America
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Author: king |
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Description: sql99标准，供需要者参考
the International Organization for Standardization-ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
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Author: ruler |
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Description: ISO (the International Organisation for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
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Author: sidleciel |
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Description: ISO (the International Organization for Standardization) and IEC (the
International Electrotechnical Commission) form the specialized system for
worldwide standardization. National bodies that are member of ISO or IEC
participate in the development of International Standards through technical
committees established by the respective org anization to deal with
particular fields of technical activity. ISO and IEC technical committees
collaborate in fields of mutual interest. Other international organizations,
governmental and non-governmental, in liaison with ISO and IEC, also take
part in the work.
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Size: 859136 |
Author: zj |
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Description: ISO (the International organization for stadardiization) and IEC (the International Electrotechnical commission) form the specialized system for worldwide standardization. The first standard of this deals with the threat and countermeasure of biometrics and biometric system application models. Additionally, this international standard provides requirements and guidelines for the secure and privacy –compliant management and processing of biometric information. We analyze here that inclination of people towards biometric for using it as a security measure is mainly due to Identity Theft. we study various biometric system application models and analyzed that because of Identity theft problem most companies provides physical access control and logical access control services in perspective of three factors that is Business case, Technical performance and User acceptance.
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Author: manoj |
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Description: OpenDocMan是一个全功能的DMS文档管理系统，遵循ISO 17025/IEC标准。提供自动化安装脚本、自定义主题、插件、check in/out，分部门访问控制，文件调整，细粒度用户访问控制，强大的搜索功能，提供中文支持。-OpenDocMan is a full-featured document management system DMS, follow the ISO 17025/IEC standards. Provides automated installation scripts, custom themes, plug-ins, check in/out, sub-sector access control, file adjustment, fine-grained user access control, powerful search capabilities, to provide Chinese support.
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Author: 朱莹莹 |
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