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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.
上傳時間： 2013-10-09
上傳用戶：woshinimiaoye
在Multisim 10軟件環境下，設計一種由運算放大器構成的精確可控矩形波信號發生器，結合系統電路原理圖重點闡述了各參數指標的實現與測試方法。通過改變RC電路的電容充、放電路徑和時間常數實現了占空比和頻率的調節，通過多路開關投入不同數值的電容實現了頻段的調節，通過電壓取樣和同相放大電路實現了輸出電壓幅值的調節并提高了電路的帶負載能力，可作為頻率和幅值可調的方波信號發生器。Multisim 10仿真分析及應用電路測試結果表明，電路性能指標達到了設計要求。 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.
上傳時間： 2014-01-21
上傳用戶：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.
標簽： Icecream-Tron Gelato-Bots Revolution 000
上傳時間： 2013-12-18
上傳用戶：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
標簽： polynomial regression weighted instance
上傳時間： 2013-11-28
上傳用戶：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.
標簽： microcontroller transceiver configured The
上傳時間： 2014-01-04
上傳用戶：c12228
制作本書的目的是為了方便大家的閱讀。轉載時請保持本電子書的完整性。 前言、條款2、16、21、44根據從Addison-Wesley出版社下載的開放條款翻譯。條款26、27、28、45根據從Scott Meyers的網站下載的《Three Guidelines for Effective Iterator Usage》一文翻譯。條款43根據從C/C++ Users Journal網站下載的《STL Algorithms vs. Hand-Written Loops》一文翻譯，條款45根據從C/C++ Users Journal網站下載的《Distinguishing STL Search Algorithms》一文翻譯。其余部分根據epubcn放出的電子書制作。
標簽： Addison-Wesley 家 保持
上傳時間： 2015-04-12
上傳用戶：jing911003
簡單混合衰落信道 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.
標簽： unmodulated Rayleigh sinewave through
上傳時間： 2015-05-17
上傳用戶：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.
標簽： Self-Teaching Demystified McGraw-Hill 0072253703
上傳時間： 2013-12-13
上傳用戶：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.
標簽： model distributed associative Hopfield
上傳時間： 2015-06-17
上傳用戶：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
標簽： 8226 Programmable Compatible In-System
上傳時間： 2015-06-27
上傳用戶：dianxin61
