數(shù)字信號(hào)處理器dsPIC33F集多通道高精度A/D轉(zhuǎn)換、多通訊模式、看門(mén)狗、CMOS Flash技術(shù)等于一體，其內(nèi)部可完成所有數(shù)據(jù)操作，實(shí)現(xiàn)總線不出芯片技術(shù)。將該處理器應(yīng)用于微機(jī)保護(hù)裝置，提出基于dsPIC33F微處理器的微機(jī)保護(hù)裝置的設(shè)計(jì)方案，給出相應(yīng)的接口電路與軟件流程。該設(shè)計(jì)方案結(jié)構(gòu)簡(jiǎn)單，性?xún)r(jià)比及可靠性高，開(kāi)發(fā)周期短，具有一定的實(shí)用推廣價(jià)值。所研制的微機(jī)保護(hù)裝置現(xiàn)場(chǎng)運(yùn)行效果良好。 Abstract: The dsPIC33F microprocessor has a plentiful interior resource which contains multi-channel，high precision A/D converters，multi-communication module，watchdog，CMOS Flash technology，and so on.All data manipulations is accomplished interiorly.What is more，it makes the technology that bus does not go beyond the chip comes into practice.The paper put forwards a design scheme based on dsPIC33F microprocessor.The scheme has the advantages of simple structure，high reliability and shortened exploitation cycle.What is more，it has definite practicality and reference.The microcomputer protection device has been put into operation with excellent effects.
上傳時(shí)間： 2013-11-16
上傳用戶(hù)：開(kāi)懷常笑
針對(duì)視頻監(jiān)控中攝像機(jī)鏡頭光圈大小、圖像聚焦、圖像變焦三項(xiàng)參數(shù)的控制問(wèn)題，介紹了一種基于89C51單片機(jī)的鏡頭控制電路的設(shè)計(jì)。 該電路以89C51單片機(jī)為核心，結(jié)構(gòu)簡(jiǎn)單，成本低廉，控制可靠，實(shí)現(xiàn)了智能監(jiān)控終端對(duì)攝像參數(shù)的完全控制。 Abstract: The design of camera lens control circuit based on 89C51 is introduced. This circuit can adjust parameters of camera such as aperture, zoom and focusing. The practice of project shows that this circuit has advantages of structure simple, low cost and high reliability.
上傳時(shí)間： 2013-10-29
上傳用戶(hù)：Wwill
The main objective of this book is to present all the relevant informationrequired for RF and micro-wave power amplifier design includingwell-known and novel theoretical approaches and practical design techniquesas well as to suggest optimum design approaches effectively combininganalytical calculations and computer-aided design. This bookcan also be very useful for lecturing to promote the analytical way ofthinking with practical verification by making a bridge between theoryand practice of RF and microwave engineering. As it often happens, anew result is the well-forgotten old one. Therefore, the demonstrationof not only new results based on new technologies or circuit schematicsis given, but some sufficiently old ideas or approaches are also introduced,that could be very useful in modern practice or could contributeto appearance of new ideas or schematic techniques.
標(biāo)簽： Amplifier Microwave Design Power
上傳時(shí)間： 2013-12-22
上傳用戶(hù)：vodssv
Semiconductor memory, card readers, microprocessors,disc drives, piezoelectric devices and digitally based systemsfurnish transient loads that a voltage regulator mustservice. Ideally, regulator output is invariant during a loadtransient. In practice, some variation is encountered andbecomes problematic if allowable operating voltage tolerancesare exceeded. This mandates testing the regulatorand its associated support components to verify desiredperformance under transient loading conditions. Variousmethods are employable to generate transient loads, allowingobservation of regulator response
標(biāo)簽： 如何測(cè)試 穩(wěn)壓器 瞬態(tài)響應(yīng) 負(fù)載
上傳時(shí)間： 2013-11-21
上傳用戶(hù)：semi1981
Beginning with an introduction to 802.11b in general, 802.11 Security gives you a broad basis in theory and practice of wireless security, dispelling some of the myths along the way. In doing so, they provide you with the technical grounding required to think about how the rest of the book applies to your specific needs and situations. If you are a network, security, or systems engineer, or anyone interested in deploying 802.11b--based systems, you ll want this book beside you every step of the way.
標(biāo)簽： 802.11 introduction Beginning Security
上傳時(shí)間： 2013-12-04
上傳用戶(hù)：CHINA526
Professional verification-A guider for advanced functional verification:Author:PAUL WILCOX Including:Verication practice, Resource usage,The Unified Verification Methodology.etc.
標(biāo)簽： verification-A Professional verification functional
上傳時(shí)間： 2014-01-17
上傳用戶(hù)：三人用菜
軟件開(kāi)發(fā)工程是有趣的、多產(chǎn)的，甚至是大膽的。同時(shí)，它也能源源不斷地帶來(lái)商業(yè)價(jià)值，并保持在我們的掌控之下。 極限編程(XP)的構(gòu)思和發(fā)展是針對(duì)小型團(tuán)隊(duì)進(jìn)行軟件開(kāi)發(fā)時(shí)，在面對(duì)不確知的、變化的需求時(shí)所產(chǎn)生的特定需要的。這一新的、輕量級(jí)的方法學(xué)對(duì)許多傳統(tǒng)思維提出了挑戰(zhàn)，這其中包括一個(gè)一直以來(lái)的假設(shè)，即在軟件開(kāi)發(fā)過(guò)程中，對(duì)軟件進(jìn)行一個(gè)小小的改動(dòng)就必然會(huì)使其開(kāi)發(fā)成本大大增加。極限編程認(rèn)可軟件開(kāi)發(fā)工程應(yīng)該節(jié)約成本，而且一旦實(shí)現(xiàn)了某種節(jié)約就應(yīng)該加以開(kāi)發(fā)利用。 你可以喜歡XP，也可以恨它，但是本書(shū)將會(huì)使你對(duì)如何開(kāi)發(fā)軟件有一個(gè)全新的認(rèn)識(shí)。KentBeck擁有并經(jīng)營(yíng)著First Class軟件公司，在這里他把主要精力放在兩個(gè)最大的興趣上——模式和極限編程。他一直在研究軟件開(kāi)發(fā)的先驅(qū)模式、CRC卡、HotDraw畫(huà)圖編輯器框架、xUnit單元測(cè)試框架以及測(cè)試為先的編程。他發(fā)表了五十多篇關(guān)于編程的文章，并出版了《The Smalltalk Best practice Patterns》(Prentice-Hall出版社)和《Kent Beck’s Guide to Better Smalltalk：A Sorted Collection》(劍橋大學(xué)出版社)兩本著作，同時(shí)他還是超級(jí)暢銷(xiāo)書(shū)《重構(gòu)——改善既有代碼的設(shè)計(jì)》(中英文版皆由中國(guó)電力出版社出版)的特約撰稿人。
標(biāo)簽： 軟件開(kāi)發(fā) 工程
上傳時(shí)間： 2015-10-02
上傳用戶(hù)：邶刖
THIS SOURCE CODE IS PROVIDED AS IS , WITH NO WARRANTIES WHATSOEVER, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE practice, RELATING TO THE SOURCE CODE OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR SAMPLE AND WITH NO OBLIGATION OF NOKIA TO PROVIDE THE LICENSEE WITH ANY MAINTENANCE OR SUPPORT. FURTHERMORE, NOKIA MAKES NO WARRANTY THAT EXERCISE OF THE RIGHTS GRANTED HEREUNDER DOES NOT INFRINGE OR MAY NOT CAUSE INFRINGEMENT OF ANY PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OWNED OR CONTROLLED BY THIRD PARTIES
標(biāo)簽： WARRANTIES WHATSOEVER INCLUDING PROVIDED
上傳時(shí)間： 2013-12-27
上傳用戶(hù)：fanboynet
With the release of PHP 5 web developers need a guide to developing with PHP 5 to both learn its complex new features and more fully implement the long-standing features on which PHP s success is built. PHP 5 in practice is a reference guide that provides developers with easy-to-use and easily extensible code to solve common PHP problems. It focuses on providing real code solutions to problems, allowing the reader to learn by seeing exactly what is happening behind the scenes to get your solution. Because a real-life situation will rarely match the book s example problems precisely, PHP 5 in practice explains the solution well enough that you will understand it and can learn how to truly solve your own problem.
標(biāo)簽： developers developing PHP release
上傳時(shí)間： 2013-12-17
上傳用戶(hù)：xzt
SpringSide以Spring Framework為核心，以Ruby On Rails的簡(jiǎn)約風(fēng)格整合Java社區(qū)的眾多開(kāi)源項(xiàng)目，為大家開(kāi)發(fā)Java企業(yè)應(yīng)用提供一個(gè)方便起點(diǎn)。 它所整合的Full-Stack 的開(kāi)源構(gòu)件庫(kù)，包括了WebService，JMS，工作流，安全，報(bào)表，規(guī)則引擎，搜索引擎，定時(shí)任務(wù)等企業(yè)應(yīng)用特性，以構(gòu)件式的開(kāi)發(fā)架構(gòu)，配合Ant腳本與SpringSide-IDE(Eclipse插件)，作為一個(gè)一站式的快速Java開(kāi)發(fā)框架。 同時(shí)，它的示例代碼充分演示了開(kāi)發(fā)團(tuán)隊(duì)與SpringSide社區(qū)共同總結(jié)的，Java企業(yè)應(yīng)用領(lǐng)域方方面面的Best practice。
標(biāo)簽： SpringSide Framework Spring 核心
上傳時(shí)間： 2015-11-20
上傳用戶(hù)：haoxiyizhong
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