Abstract: As industrial control systems (ICSs) have become increasingly connected and use more off-the-shelfcomponents, new vulnerabilities to cyber attacks have emerged. This tutorial looks at three types of ICSs:programmable logic controllers (PLCs), supervisory control and data acquisition (SCADA) systems, anddistributed control systems (DCSs), and then discusses security issues and remedies. This document alsoexplains the benefits and limitations of two cryptographic solutions (digital signatures and encryption) andelaborates on the reasons for using security ICs in an ICS to support cryptography.
上传时间： 2013-10-09
上传用户：woshinimiaoye
在Multisim 10软件环境下，设计一种由运算放大器构成的精确可控矩形波信号发生器，结合系统电路原理图重点阐述了各参数指标的实现与测试方法。通过改变RC电路的电容充、放电路径和时间常数实现了占空比和频率的调节，通过多路开关投入不同数值的电容实现了频段的调节，通过电压取样和同相放大电路实现了输出电压幅值的调节并提高了电路的带负载能力，可作为频率和幅值可调的方波信号发生器。Multisim 10仿真分析及应用电路测试结果表明，电路性能指标达到了设计要求。 Abstract: Based on Multisim 10， this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier， the key point was how to implement and test the parameter indicators based on the circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor， the width of frequency was adjusted by using different capacitors provided with multiple switch， the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit，the ability of driving loads was raised， the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
上传时间： 2014-01-21
上传用户：shen007yue
Giga Crime Fighting Mecha Gelato-Bots: The Supreme Icecream-Tron Revolution 8,000,000. A top-down adventure game with three themes; mecha, anime and icecream. This project hopes to evolve with action/rpg/multiplayer elements like classic console games.
标签： Icecream-Tron Gelato-Bots Revolution 000
上传时间： 2013-12-18
上传用户：D&L37
Locally weighted polynomial regression LWPR is a popular instance based al gorithm for learning continuous non linear mappings For more than two or three in puts and for more than a few thousand dat apoints the computational expense of pre dictions is daunting We discuss drawbacks with previous approaches to dealing with this problem
标签： polynomial regression weighted instance
上传时间： 2013-11-28
上传用户：sunjet
The CC1000 RF transceiver is very easy to interface with a microcontroller. The chip is configured using a three-wire bus, comprising of PCLK, PDATA and PALE signals.
标签： microcontroller transceiver configured The
上传时间： 2014-01-04
上传用户：c12228
制作本书的目的是为了方便大家的阅读。转载时请保持本电子书的完整性。 前言、条款2、16、21、44根据从Addison-Wesley出版社下载的开放条款翻译。条款26、27、28、45根据从Scott Meyers的网站下载的《Three Guidelines for Effective Iterator Usage》一文翻译。条款43根据从C/C++ Users Journal网站下载的《STL Algorithms vs. Hand-Written Loops》一文翻译，条款45根据从C/C++ Users Journal网站下载的《Distinguishing STL Search Algorithms》一文翻译。其余部分根据epubcn放出的电子书制作。
标签： Addison-Wesley 家 保持
上传时间： 2015-04-12
上传用户：jing911003
简单混合衰落信道 This mfile inputs an unmodulated sinewave through a simple Rayleigh two path fading channel and shows the output with phase, gain, and attenuation characteristics via animation.
标签： unmodulated Rayleigh sinewave through
上传时间： 2015-05-17
上传用户：CSUSheep
C++ Demystified: A Self-Teaching Guide by Jeff Kent ISBN:0072253703 McGraw-Hill/Osborne © 2004 This hands-on, step-by-step resource will guide you through each phase of C++ programming, providing you with the foundation to discover how computer programs and programming languages work.
标签： Self-Teaching Demystified McGraw-Hill 0072253703
上传时间： 2013-12-13
上传用户：1427796291
The Hopfield model is a distributed model of an associative memory. Neurons are pixels and can take the values of -1 (off) or +1 (on). The network has stored a certain number of pixel patterns. During a retrieval phase, the network is started with some initial configuration and the network dynamics evolves towards the stored pattern which is closest to the initial configuration.
标签： model distributed associative Hopfield
上传时间： 2015-06-17
上传用户：l254587896
Features • Compatible with MCS-51® Products • 8K Bytes of In-System Programmable (ISP) Flash Memory – Endurance: 1000 Write/Erase Cycles • 4.0V to 5.5V Operating Range • Fully Static Operation: 0 Hz to 33 MHz • Three-level Program Memory Lock • 256 x 8-bit Internal RAM • 32 Programmable I/O Lines • Three 16-bit Timer/Counters • Eight Interrupt Sources • Full Duplex UART Serial Channel • Low-power Idle and Power-down Modes • Interrupt Recovery from Power-down Mode • Watchdog Timer • Dual Data Pointer • Power-off Flag
标签： 8226 Programmable Compatible In-System
上传时间： 2015-06-27
上传用户：dianxin61
