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[
Program doc
]
写者与读者实验报告
DL : 0
在Windows Xp 环境下,创建一个包含n 个线程的控制台进程。用这n 个线程来表示n个读者或写者。每个线程按相应测试数据文件的要求,进行读写操作。请用信号量机制分别实现读者优先和写者优先的读者-写者问题。 读者-写者问题的读写操作限制: 读者-写者的读写限制(包括读者优先和写者优先) 1)写-写互斥,即不能有两个写者同时进行写操作 2)读-写互斥,即不能同时有一个读者在读,同时却有一个写者在写 3)读读允许,即可以有2个以上的读者同时读 将所有的读者和所有的写者分别放进两个等待队列中,当读允许时就让读者队列释放一个或多个读者,当写允许时,释放第一个写者操作。 读者写者问题的定义如下: 有一个许多进程共享的数据区,这个数据区可以是一个文件或者主存的一块空间; 有一些只读取这个数据区的进程(Reader)和一些只往数据区写数据的进程(Writer),此外还需要满足以下条件: 1) 任意多个读进程可以同时读这个文件; 2) 一次只有一个写进程可以往文件中写; 3) 如果一个写进程正在进行操作,禁止任何读进程度文件。 我们需要分两种情况实现该问题: 读优先:要求指一个读者试图进行读操作时,如果这时正有其他读者在进行操作,他可直接开始读操作,而不需要等待。 写优先:一个读者试图进行读操作时,如果有其他写者在等待进行写操作或正在进行写操作,他要等待该写者完成写操作后才开始读操作。
Date
: 2011-06-04
Size
: 31.86kb
User
:
zhzghyd
[
Program doc
]
公交非接触IC卡读写器的应用设计
DL : 0
公交非接触IC卡读写器的应用设计采用PHILIPS公司的Mifare卡作IC卡,设计以射频技术为核心,以单片机为控制器的IC卡读写器在公交自动收费系统中的应用。制作的IC卡读写器可以实现制卡、售卡、自动收费等功能,具有安全、实用、方便、快捷、可靠性高的特点,解决了城市公共交通服务行业既频繁又琐碎的收费管理问题,有广泛的应用前景。-Bus non-contact IC card reader applications designed using the Philips Mifare cards for IC cards, designed to RF technology as the core, microprocessor controller IC card reader automatically charges the transit system applications. The production of IC card reader card system can be achieved, A file, automatic charges and other functions, is safe, practical and convenient, fast and high reliability features to solve the urban public transport sector is also frequent charges trivial issues, a broad range of applications.
Date
: 2026-01-16
Size
: 132kb
User
:
广龙
[
Program doc
]
wm-01tC源程序
DL : 0
射频卡读卡程序,射频IC卡识别技术,通常由载有密码的射频IC卡来代替传统的键盘密码。读卡模块读出密码后,即产生输出电信号,继而驱动执行机构动作,或将密码(如卡号)送给外围对接设备(如电脑或单片机等)。采用射频卡读卡模块及感应体构成的特定系统中,因射频卡内码信号唯一且不可复制,因此射频卡不仅杜绝了非法复制密码,还为各种控制采用信息化管理创造了条件。-RF card reader procedure, radio frequency identification technology IC cards, usually containing the password from the RF IC cards to replace the traditional keyboard password. Reader module read out a password, as a result, the output signal, and then drive the implementation agency action, or passwords (such as logging) gave the external docking equipment (such as computer or microcontroller, etc.). RF card reader module consisting of sensors and the specific system, RF signal code card but not the only copy, RF Card not only prevents illegal copying passwords, but also controls the use of information management to create the conditions.
Date
: 2026-01-16
Size
: 1kb
User
:
赵凉
[
Program doc
]
IC卡读写程序
DL : 0
IC卡读写程序,简单明了,实用性强,有参考价值-IC card reader procedures, straightforward, practical, reference value
Date
: 2026-01-16
Size
: 2kb
User
:
海岭
[
Program doc
]
ZLG500Bdemo
DL : 0
一个用于ZLG500板子用的一个读写程序,是值得看看的用的-a ZLG500 blame for the reader a procedure is worth a look at the! !
Date
: 2026-01-16
Size
: 33kb
User
:
金波
[
Program doc
]
ISO7816
DL : 0
Date
: 2026-01-16
Size
: 37kb
User
:
李刚
[
Program doc
]
mf-200
DL : 0
mf-200读写器模块 mf-200读写器模块-mf-200 Reader module m f-200 Reader Module
Date
: 2026-01-16
Size
: 135kb
User
:
sangxue
[
Program doc
]
yx-em-sy485
DL : 0
yx-em-sy485读写器模块 y x-em-sy485读写器模块 -yx-em-sy485 Reader module y x-e m-sy485 Reader Module
Date
: 2026-01-16
Size
: 52kb
User
:
sangxue
[
Program doc
]
yx-em-100
DL : 0
yx-em-100读写器模块 yx-em-100读写器模块-yx-em-100 Reader module yx-em-10 0 Reader Module
Date
: 2026-01-16
Size
: 213kb
User
:
sangxue
[
Program doc
]
MFRC500_Chinese
DL : 0
PHILIPS非接触式射频卡读写芯片MFRC500中文资料-PHILIPS non-contact chip RF Card Reader MFRC500 Chinese data
Date
: 2026-01-16
Size
: 1.36mb
User
:
zxh
[
Program doc
]
FM1702_1704_1705(CN)
DL : 0
FM1702_1704_1705中文说明书 --非常详细的RC500或FM1702的中文数据手册 1. 概述. FM1702/1704/1705 是复旦微电子股份有限公司设计的基于ISO14443 标准的. 非接触卡读卡机专用芯片,采用0.6 微米CMOS EEPROM 工艺,支持13.56MHz. 频率下的typeA 非接触通信协议,支持多种加密算法,兼容Philips 的MF RC500 读卡机芯片.-FM1702_1704_1705 Chinese brochures-- very detailed RC500 or FM 1702 of a Chinese manual data. outlined. FM1702/1704/1705 of Fudan Microelectronics shares Limited design based on ISO14443 standards. Non-contact card reader ASIC. using 0.6 micron CMOS EEPROM process, support 13.56 MHz. typeA frequency of non-contact communication protocol, support for multiple encryption algorithm, compatibility of Philips MF RC500 chip card reader.
Date
: 2026-01-16
Size
: 1.98mb
User
:
liuxikui
[
Program doc
]
ADS_DRO
DL : 0
This Agilent ADS tools, there has examples for design the Microwave osc,the total ADS detail can reader at agilent webnet.
Date
: 2026-01-16
Size
: 165kb
User
:
daverong
[
Program doc
]
Design_of_915MHz_RFID_Reader
DL : 0
Design of 915MHz RFID Reader 915MHz RFID读卡器设计----硕士学位论文-Design of 915MHz RFID Reader915MHz RFID reader design---- a master s degree thesis
Date
: 2026-01-16
Size
: 2.94mb
User
:
woo
[
Program doc
]
V2BF
DL : 0
欧姆龙技术资料,读卡系统通讯协议,可作为编程技术资料。-Omron technical information systems communication protocol reader can be used as technical information on programming.
Date
: 2026-01-16
Size
: 522kb
User
:
[
Program doc
]
CanBusObd2CodeReader
DL : 1
Can-Bus Obd2 Code Reader
Date
: 2026-01-16
Size
: 2.59mb
User
:
Doris207
[
Program doc
]
sd
DL : 0
基于 AT89C52单片机的 SD卡读写设计 描述比较详细-Based on AT89C52 Microcontroller SD card reader a more detailed design description
Date
: 2026-01-16
Size
: 125kb
User
:
zhlg
[
Program doc
]
Antenna
DL : 0
* Loading... * 13.56MHz HF RFID Reader With unique antenna auto tuning, power output 700mW. Get tech Spec!- * Loading... * 13.56MHz HF RFID Reader With unique antenna auto tuning, power output 700mW. Get tech Spec!
Date
: 2026-01-16
Size
: 524kb
User
:
thanh
[
Program doc
]
low-level-reader-protocol
DL : 0
基于低级别协的射频识别系统,RFID与客户端直接的中间件。-Based on low-level reader protocol RFID middleware system
Date
: 2026-01-16
Size
: 136kb
User
:
dengbiao
[
Program doc
]
SLRM900-I-CODE-Long-range-reader
DL : 0
SLRM900 I-CODE for Long range RFID reader
Date
: 2026-01-16
Size
: 73kb
User
:
Hung
[
Program doc
]
SYRIS-READER
DL : 0
SYRIS 读卡器通讯手册 型号:SYRDS1-485(SYRDSSS1)-SYRIS reader Communication Manual MODEL:SYRDS1-485(SYRDSSS1)
Date
: 2026-01-16
Size
: 239kb
User
:
endychan
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