摘要：本文主要介紹以CPLD 芯片進(jìn)行十字路口的交通燈的設(shè)計(jì)，用CPLD 作為交通燈控制器的主控芯片，采用VHDL 語(yǔ)言編寫(xiě)控制程序，利用CPLD的可重復(fù)編程和在動(dòng)態(tài)系統(tǒng)重構(gòu)的特性，大大地提高了數(shù)字系統(tǒng)設(shè)計(jì)的靈活性和通用性。 關(guān)鍵詞：CPLD；VHDL；交通燈控制器 中圖分類(lèi)號(hào)：TP39 Abstract ：This paper introduces the Electronic-traffic lamp, which is based on the VHDL and is completed by
上傳時(shí)間： 2013-12-30
上傳用戶(hù)：bruce
RSA算法是第一個(gè)能同時(shí)用于加密和數(shù)字簽名的算法，也易于理解和操作。 RSA是被研究得最廣泛的公鑰算法，從提出到現(xiàn)在已近二十年，經(jīng)歷了各種攻擊的考驗(yàn)，逐漸為人們接受，普遍認(rèn)為是目前最優(yōu)秀的公鑰方案之一。RSA的安全性依賴(lài)于大數(shù)的因子分解，但并沒(méi)有從理論上證明破譯RSA的難度與大數(shù)分解難度等價(jià)。即RSA的重大缺陷是無(wú)法從理論上把握它的保密性能如何，而且密碼學(xué)界多數(shù)人士?jī)A向于因子分解不是NPC問(wèn)題。RSA的缺點(diǎn)主要有：A)產(chǎn)生密鑰很麻煩，受到素?cái)?shù)產(chǎn)生技術(shù)的限制，因而難以做到一次一密。B)分組長(zhǎng)度太大，為保證安全性，n 至少也要 600 bits以上，使運(yùn)算代價(jià)很高，尤其是速度較慢，較對(duì)稱(chēng)密碼算法慢幾個(gè)數(shù)量級(jí)；且隨著大數(shù)分解技術(shù)的發(fā)展，這個(gè)長(zhǎng)度還在增加，不利于數(shù)據(jù)格式的標(biāo)準(zhǔn)化。目前，SET(Secure Electronic Transaction)協(xié)議中要求CA采用2048比特長(zhǎng)的密鑰，其他實(shí)體使用1024比特的密鑰。 這種算法1978年就出現(xiàn)了，它是第一個(gè)既能用于數(shù)據(jù)加密也能用于數(shù)字簽名的算法。它易于理解和操作，也很流行。算法的名字以發(fā)明者的名字命名：Ron Rivest, AdiShamir 和Leonard Adleman。但RSA的安全性一直未能得到理論上的證明。
上傳時(shí)間： 2014-01-20
上傳用戶(hù)：蠢蠢66
There is a DES crypto programm. Only for lab. To make some mesurements. And some Heming scheme s in a EWB (Electronic work Bench)
標(biāo)簽： some mesurements programm Heming
上傳時(shí)間： 2017-08-08
上傳用戶(hù)：13188549192
The software and hardware development fields evolved along separate paths through the end of the 20th century. We seem to have come full circle, however. The previously rigid hardware on which our programs run is softening in many ways. Embedded systems are largely responsible for this softening. These hidden computing systems drive the Electronic products around us, including consumer products like digital cameras and personal digital assistants, office automation equipment like copy machines and printers, medical devices like heart monitors and ventilators, and automotive Electronics like cruise controls and antilock brakes. Embedded systems force designers to work under incredibly tight time-tomarket, power consumption, size, performance, flexibility, and cost constraints. Many technologies introduced over the past two decades have sought to help satisfy these constraints. To understand these technologies, it is important to first distinguish the underlying embedded systems elements.
標(biāo)簽： development the software hardware
上傳時(shí)間： 2017-08-15
上傳用戶(hù)：cjf0304
The potential of solving real-time demanding industrial applications, using vision-based algorithms, drastically grew due to an increasing availability of computational power. In this thesis a novel real-time, vision-based Blackjack analysis system is presented. The embedding of the vision algorithms in a compound system of other information sources such as an Electronic chip tray, reduces the vision task to detect cards and chips. Robust results are achieved by not just analyzing single frames but an image stream regarding game-ß ow informations. The requirements for such a system are a highly robust and adaptive behav- ior. This is motivated by the vital interest of casino entrepreneurs in a 100 statistical analysis of their offered gambling in order to support the business plan, measuring table and dealer performance and give accurate player rating. Extensive experiments show the robustness and applicability of the proposed system.
標(biāo)簽： applications vision-based algorithms industrial
上傳時(shí)間： 2017-08-20
上傳用戶(hù)：liansi
SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. It is used in countless desktop computer applications as well as consumer Electronic devices including cellphones, PDAs, and MP3 players. The source code for SQLite is in the public domain.
標(biāo)簽： zero-configuration self-contained implements serverless
上傳時(shí)間： 2013-12-09
上傳用戶(hù)：manlian
Within this book the fundamental concepts associated with the topic of power Electronic control are covered alongside the latest equipment and devices, new application areas and associated computer-assisted methods. *A practical guide to the control of reactive power systems *Ideal for postgraduate and professional courses *Covers the latest equipment and computer-aided analysis
標(biāo)簽： power Electronic electrical system
上傳時(shí)間： 2015-02-20
上傳用戶(hù)：12345654321
An application that adds products to an Electronic shopping cart. The application uses three classes: Product, ShoppingCart, and ShoppingCartApplication. Part of the work has been done for you and is provided in the student archive. You will implement the method in ShoppingCartApplication that reads product information from the keyboard and creates a Product object.
標(biāo)簽： Product ShoppingCart
上傳時(shí)間： 2015-11-12
上傳用戶(hù)：chengzi74
With the advancement of technology and miniaturization of Electronic devices, applications of wireless sensor networks (WSNs) can be seen in diverse areas in our lives. In fact, these WSNs have gained a lot of attention from both the research community and industry, making them easily available on the market. An extensive amount of research, easy availability, and cheap cost make them useful in various types of futuristic applications as well.
標(biāo)簽： Communication Technologies Emerging
上傳時(shí)間： 2020-05-27
上傳用戶(hù)：shancjb
In recent years, the research and developments in the area of RF and microwave technologies have progressed significantly due to the growing demand for applica- bility in wireless communication technologies. Starting from 1992, wireless com- munication technologies have become quite mature. In the modern era of Electronic developments, design of wireless handsets is an example of integration of many di- verse skill sets. Classical books in the areas of microwave technology provide us with an in-depth knowledge of electromagnetic fundamentals.
標(biāo)簽： Front-Ends Receiver Modern
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
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