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Background

  • SOME Background ON DESIGN PATTERNS The term “design patterns” sounds a bit formal to the uninitiate

    SOME Background ON DESIGN PATTERNS The term “design patterns” sounds a bit formal to the uninitiated and can be somewhat off-putting when you first encounter it. But, in fact, design patterns are just convenient ways of reusing object-oriented code between projects and between programmers. The idea behind design patterns is simple-- write down and catalog common interactions between objects that programmers have frequently found useful.

    標(biāo)簽: Background uninitiate PATTERNS patterns

    上傳時(shí)間: 2013-12-22

    上傳用戶:shizhanincc

  • The book presents a historical Background of past and present guided missile systems and the evoluti

    The book presents a historical Background of past and present guided missile systems and the evolution of modern weapons,discusses the generalized missile equations of motion, aerodynamic forces and coefficients, the important subject of the various types of tactical guidance laws and/or techniques, weapon delivery systems and techniques,strategic missiles and cruise missile theory and design.

    標(biāo)簽: Background historical and presents

    上傳時(shí)間: 2017-08-14

    上傳用戶:jennyzai

  • to subtract Background

    to subtract Background

    標(biāo)簽: Background subtract to

    上傳時(shí)間: 2014-11-28

    上傳用戶:225588

  • This m-file implements the frame difference algorithm for Background subtraction.

    This m-file implements the frame difference algorithm for Background subtraction.

    標(biāo)簽: subtraction implements difference Background

    上傳時(shí)間: 2013-12-26

    上傳用戶:123456wh

  • State Machine Coding Styles for Synthesis

      本文論述了狀態(tài)機(jī)的verilog編碼風(fēng)格,以及不同編碼風(fēng)格的優(yōu)缺點(diǎn),Steve Golson's 1994 paper, "State Machine Design Techniques for Verilog and VHDL" [1], is agreat paper on state machine design using Verilog, VHDL and Synopsys tools. Steve's paper alsooffers in-depth Background concerning the origin of specific state machine types.This paper, "State Machine Coding Styles for Synthesis," details additional insights into statemachine design including coding style approaches and a few additional tricks.

    標(biāo)簽: Synthesis Machine Coding Styles

    上傳時(shí)間: 2013-10-15

    上傳用戶:dancnc

  • 2012TI電子設(shè)計(jì)大賽——微弱信號(hào)檢測(cè)裝置

    微弱信號(hào)檢測(cè)裝置 四川理工學(xué)院 劉鵬飛、梁天德、曾學(xué)明 摘要: 本設(shè)計(jì)以TI的Launch Pad為核心板,采用鎖相放大技術(shù)設(shè)計(jì)并制作了一套微弱信號(hào)檢測(cè)裝置,用以檢測(cè)在強(qiáng)噪聲背景下已知頻率微弱正弦波信號(hào)的幅度值,并在液晶屏上數(shù)字顯示出所測(cè)信號(hào)相應(yīng)的幅度值。實(shí)驗(yàn)結(jié)果顯示其抗干擾能力強(qiáng),測(cè)量精度高。 關(guān)鍵詞:強(qiáng)噪聲;微弱信號(hào);鎖相放大;Launch Pad Abstract: This design is based on the Launch Pad of TI core board, using a lock-in amplifier technique designed and produced a weak signal detection device, to measure the known frequency sine wave signal amplitude values of the weak in the high noise Background, and shows the measured signal amplitude of the corresponding value in the liquid crystal screen. Test results showed that it has high accuracy and strong anti-jamming capability. Keywords: weak signal detection; lock-in-amplifier; Launch Pad  1、引言 隨著現(xiàn)代科學(xué)技術(shù)的發(fā)展,在科研與生產(chǎn)過程中人們?cè)絹碓叫枰獜膹?fù)雜高強(qiáng)度的噪聲中檢測(cè)出有用的微弱信號(hào),因此對(duì)微弱信號(hào)的檢測(cè)成為當(dāng)前科研的熱點(diǎn)。微弱信號(hào)并不意味著信號(hào)幅度小,而是指被噪聲淹沒的信號(hào),“微弱”也僅是相對(duì)于噪聲而言的。只有在有效抑制噪聲的條件下有選擇的放大微弱信號(hào)的幅度,才能提取出有用信號(hào)。微弱信號(hào)檢測(cè)技術(shù)的應(yīng)用相當(dāng)廣泛,在生物醫(yī)學(xué)、光學(xué)、電學(xué)、材料科學(xué)等相關(guān)領(lǐng)域顯得愈發(fā)重要。 2、方案論證 針對(duì)微弱信號(hào)的檢測(cè)的方法有很多,比如濾波法、取樣積分器、鎖相放大器等。下面就針對(duì)這幾種方法做一簡(jiǎn)要說明。 方案一:濾波法。 在大部分的檢測(cè)儀器中都要用到濾波方法對(duì)模擬信號(hào)進(jìn)行一定的處理,例如隔離直流分量,改善信號(hào)波形,防止離散化時(shí)的波形混疊,克服噪聲的不利影響,提高信噪比等。常用的噪聲濾波器有:帶通、帶阻、高通、低通等。但是濾波方法檢測(cè)信號(hào)不能用于信號(hào)頻譜與噪聲頻譜重疊的情況,有其局限性。雖然可以對(duì)濾波器的通頻帶進(jìn)行調(diào)節(jié),但其噪聲抑制能力有限,同時(shí)其準(zhǔn)確性與穩(wěn)定性將大打折扣。

    標(biāo)簽: 2012 TI 電子設(shè)計(jì)大賽 微弱信號(hào)

    上傳時(shí)間: 2013-11-04

    上傳用戶:lty6899826

  • PCIe Trusted Configuration Spa

    TCS ECN Background & Key TermsTrust Issues with PCIe PlatformsTCS ECN DetailsTrusted Config Space and TCS TransactionsTrusted Config Access Mech (TCAM)Standard vs Trusted Config AccessNew Capability StructuresTCS Support in Root Ports, Switches, & BridgesTCS “Does not…” ListExample Trusted Computing PlatformRevisiting the Trust IssuesKey Takeaways/Call to ActionQuestions

    標(biāo)簽: Configuration Trusted PCIe Spa

    上傳時(shí)間: 2013-11-21

    上傳用戶:hsfei8

  • 高速數(shù)字系統(tǒng)設(shè)計(jì)下載pdf

    高速數(shù)字系統(tǒng)設(shè)計(jì)下載pdf:High-Speed Digital SystemDesign—A Handbook ofInterconnect Theory and DesignPracticesStephen H. HallGarrett W. HallJames A. McCallA Wiley-Interscience Publication JOHN WILEY & SONS, INC.New York • Chichester • Weinheim • Brisbane • Singapore • TorontoCopyright © 2000 by John Wiley & Sons, Inc.speeddigital systems at the platform level. The book walks the reader through everyrequired concept, from basic transmission line theory to digital timing analysis, high-speedmeasurement techniques, as well as many other topics. In doing so, a unique balancebetween theory and practical applications is achieved that will allow the reader not only tounderstand the nature of the problem, but also provide practical guidance to the solution.The level of theoretical understanding is such that the reader will be equipped to see beyondthe immediate practical application and solve problems not contained within these pages.Much of the information in this book has not been needed in past digital designs but isabsolutely necessary today. Most of the information covered here is not covered in standardcollege curricula, at least not in its focus on digital design, which is arguably one of the mostsignificant industries in electrical engineering.The focus of this book is on the design of robust high-volume, high-speed digital productssuch as computer systems, with particular attention paid to computer busses. However, thetheory presented is applicable to any high-speed digital system. All of the techniquescovered in this book have been applied in industry to actual digital products that have beensuccessfully produced and sold in high volume.Practicing engineers and graduate and undergraduate students who have completed basicelectromagnetic or microwave design classes are equipped to fully comprehend the theorypresented in this book. At a practical level, however, basic circuit theory is all theBackground required to apply the formulas in this book.

    標(biāo)簽: 高速數(shù)字 系統(tǒng)設(shè)計(jì)

    上傳時(shí)間: 2013-10-26

    上傳用戶:縹緲

  • 基于PIC16LF874單片機(jī)的電容測(cè)量模塊

    為提高電容測(cè)量精度,針對(duì)電容式傳感器的工作原理設(shè)計(jì)了基于PIC16LF874單片機(jī)電容測(cè)量模塊。簡(jiǎn)單闡述了電容測(cè)量電路的應(yīng)用背景和國內(nèi)外研究現(xiàn)狀,介紹了美國Microchip公司PIC16LF874單片機(jī)的特性。電容式傳感器輸出的動(dòng)態(tài)微弱電容信號(hào)通過PS021型電容數(shù)字轉(zhuǎn)換器把模擬量數(shù)據(jù)轉(zhuǎn)換成數(shù)字量數(shù)據(jù),所測(cè)數(shù)據(jù)由PIC16LF874單片機(jī)應(yīng)用程序進(jìn)行處理、顯示和保存。實(shí)驗(yàn)結(jié)果表明,固定電容標(biāo)稱值為10~20 pF 的測(cè)量值相對(duì)誤差在1%以內(nèi),同時(shí)也可知被測(cè)電容容值越大,測(cè)量值和標(biāo)稱值相對(duì)誤差越小。 Abstract:  To improve the accuracy of capacitance measurement,aimed at the principle of work of mercury capacitance acceleration transducer,the design of micro capacitance measurement circuit is based on the key PIC16LF874 chip. Briefly discusses the application of the capacitance measuring circuit for the Background and status of foreign researchers,focusing on the United States PIC16LF874 microcontroller features. Capacitive sensor outputed signal through the dynamics of weak PS021-chip capacitors (capacitancedigital converter) to convert analog data into digital data,the measured data from the PIC16LF874 microcontroller application process, display and preservation. Experimental results show that the fixed capacitor 10pF ~ 20pF nominal value of the measured value of relative error is within 1%,but also it canbe seen the value of the measured capacitance larger,measuring value and the nominal value of relative error smaller.

    標(biāo)簽: PIC 874 16 LF

    上傳時(shí)間: 2013-10-29

    上傳用戶:wojiaohs

  • HCS12微控制器MC9S12DP256使用指南 ppt

    HCS12微控制器MC9S12DP256 第一步: 1) HCS12 技術(shù)概述2) Operating Modes工作模式3) Resource  Mapping資源映射4) External Bus Interface外部總線接口5) Port Integration Module端口集成模塊6) Background Debug Mode背景調(diào)試模塊

    標(biāo)簽: 12 HCS 256 MC9

    上傳時(shí)間: 2013-12-20

    上傳用戶:源碼3

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