Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic INStitute and State Universityin partial fulfillment of the requirements for the degree of Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This work presents the modeling and analysis of EMI and thermal performancefor switch power supply by using the CAD tools. The methodology and design guidelinesare developed.By using a boost PFC circuit as an example, an equivalent circuit model is builtfor EMI noise prediction and analysis. The parasitic elements of circuit layout andcomponents are extracted analytically or by using CAD tools. Based on the model, circuitlayout and magnetic component design are modified to minimize circuit EMI. EMI filtercan be designed at an early stage without prototype implementation.In the second part, thermal analyses are conducted for the circuit by using thesoftware Flotherm, which includes the mechanism of conduction, convection andradiation. Thermal models are built for the components. Thermal performance of thecircuit and the temperature profile of components are predicted. Improved thermalmanagement and winding arrangement are investigated to reduce temperature.In the third part, several circuit layouts and inductor design examples are checkedfrom both the EMI and thermal point of view. Insightful information is obtained.
標(biāo)簽： EMI 開(kāi)關(guān)電源 英文
上傳時(shí)間： 2013-11-16
上傳用戶：萍水相逢
lwIP is a small independent implementation of the TCP/IP protocol suite that has been developed by Adam Dunkels at the Computer and Networks Architectures (CNA) lab at the Swedish INStitute of Computer Science (SICS).
標(biāo)簽： implementation independent developed protocol
上傳時(shí)間： 2015-05-02
上傳用戶：windwolf2000
計(jì)算所漢語(yǔ)詞法分析系統(tǒng)ICTCLAS介紹 詞是最小的能夠獨(dú)立活動(dòng)的有意義的語(yǔ)言成分。 但漢語(yǔ)是以字為基本的書(shū)寫(xiě)單位，詞語(yǔ)之間沒(méi)有明顯的區(qū)分標(biāo)記，因此，中文詞語(yǔ)分析是中文信息處理的基礎(chǔ)與關(guān)鍵。為此,我們中國(guó)科學(xué)院計(jì)算技術(shù)研究所在多年研究基礎(chǔ)上，耗時(shí)一年研制出了漢語(yǔ)詞法分析系統(tǒng)ICTCLAS(INStitute of Computing Technology, Chinese Lexical Analysis System)，該系統(tǒng)的功能有：中文分詞；詞性標(biāo)注；未登錄詞識(shí)別。分詞正確率高達(dá)97%以上，未登錄詞識(shí)別召回率均高于90%，其中中國(guó)人名的識(shí)別召回率接近98%處理速度為31.5Kbytes/s。ICTCLAS的特色還在于：可以根據(jù)需要輸出多個(gè)高概率結(jié)果，有多種輸出格式，支持北大詞性標(biāo)注集，973專家組給出的詞性標(biāo)注集合。該系統(tǒng)得到了專家的好評(píng)，并有多篇論文在國(guó)內(nèi)外發(fā)表。 計(jì)算所漢語(yǔ)詞法分析系統(tǒng)ICTCLAS同時(shí)還提供一套完整的動(dòng)態(tài)連接庫(kù)ICTCLAS.dll和相應(yīng)的概率詞典,開(kāi)發(fā)者可以完全忽略漢語(yǔ)詞法分析，直接在自己的系統(tǒng)中調(diào)用ICTCLAS，ICTCLAS可以根據(jù)需要輸出多個(gè)高概率的結(jié)果，輸出格式也可以定制，開(kāi)發(fā)者在分詞和詞性標(biāo)注的基礎(chǔ)上繼續(xù)上層開(kāi)發(fā)。
標(biāo)簽： ICTCLAS 漢語(yǔ) 分 計(jì)算
上傳時(shí)間： 2014-01-02
上傳用戶：15736969615
wcdma的多徑環(huán)境下的上下行仿真，EITS標(biāo)準(zhǔn)，written by The Mobile and Portable Radio Research Group The Bradley rtment of Electrical and Computer Engineering Virginia Polytechnic INStitute and State University Blacksburg, Virginia
標(biāo)簽： wcdma 多徑環(huán)境 仿真
上傳時(shí)間： 2015-05-13
上傳用戶：225588
gprs協(xié)議棧代碼.所謂協(xié)議棧就是對(duì)信息進(jìn)行多次封裝和解封的過(guò)程，以便能夠在不同的實(shí)體間傳送信息。本源代碼來(lái)自Indian INStitute of Technology
上傳時(shí)間： 2013-12-25
上傳用戶：Thuan
Delphi6.0函數(shù)大全，Delphi程序員的至愛(ài)。∷圖書(shū)簡(jiǎn)介∷ 電子圖書(shū)名:Delphi6函數(shù)大全 Delphi6函數(shù)大全（1） <> 首部 function AnsiResemblesText(const AText, AOther: string): Boolean $[StrUtils.pas功能 返回兩個(gè)字符串是否相似說(shuō)明 ANSI(American National Standards INStitute)美國(guó)國(guó)家標(biāo)準(zhǔn)協(xié)會(huì) 不區(qū)分大小寫(xiě)參考 function StrUtils.SoundexProc var StrUtils.AnsiResemblesProc例子 CheckBox1.Checked := AnsiResemblesText(Edit1.Text, Edit2.Text)
上傳時(shí)間： 2016-01-25
上傳用戶：mikesering
UNDERSTANDING THE NEW U.S. NATIONAL SPACE POLICY，John M. Logsdon Director, Space Policy INStitute Elliott School of International Affairs The George Washington University Washington, DC, USA
標(biāo)簽： U.S. UNDERSTANDING NATIONAL POLICY
上傳時(shí)間： 2014-12-20
上傳用戶：蟲(chóng)蟲(chóng)蟲(chóng)蟲(chóng)蟲(chóng)蟲(chóng)
THE UNITED STATES AND HUMAN SPACE EXPLORATION，John M. Logsdon Director, Space Policy INStitute Elliott School of International Affairs The George Washington University Washington, DC, USA 在北大的講座資料
標(biāo)簽： EXPLORATION STATES UNITED HUMAN
上傳時(shí)間： 2016-03-06
上傳用戶：zycidjl
【下載說(shuō)明】 這里提供給大家的是《Embedded Linux: Hardware, Software, and Interfacing》（嵌入式 Linux---硬件、軟件與接口）一書(shū)的英文原版CHM格式下載。 【作者簡(jiǎn)介】 Craig Hollabaugh has been fascinated by electronics since he bought an AM radio in elementary school. He was first exposed to Unix during a cross-country talk session in 1985. Later, he administered networked Sun and DEC workstations while pursuing a doctoral degree in electrical engineering at Georgia INStitute of Technology. 【內(nèi)容提要】 本書(shū)通過(guò)一個(gè)冬季旅游勝地自動(dòng)化管理項(xiàng)目實(shí)例，從軟件、硬件和接口的觀點(diǎn)介紹嵌入式Linux。引入項(xiàng)目需求后，作者講述了開(kāi)發(fā)環(huán)境的建立，接著用一系列軟硬件接口實(shí)例展示了如何使用異步串行通信、PC并口、USB、內(nèi)存I/O、同步串行通信以及中斷，等等。最后介紹了將前面所有的工作有機(jī)地組織在一起的系統(tǒng)集成過(guò)程。本書(shū)以實(shí)際應(yīng)用為導(dǎo)向，書(shū)中整個(gè)項(xiàng)目的實(shí)施過(guò)程和軟硬件接口實(shí)例都具實(shí)踐指導(dǎo)意義。
標(biāo)簽： Linux Interfacing Embedded Hardware
上傳時(shí)間： 2014-01-22
上傳用戶：shus521
算法導(dǎo)論英文版 This book is one of a series of texts written by faculty of the Electrical Engineering and Computer Science Department at the Massachusetts INStitute of Technology. I
標(biāo)簽： Engineering Electrical of faculty
上傳時(shí)間： 2016-04-07
上傳用戶：123456wh
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