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MATRIX-chain

  • RFID in the Supply Chain A Guide to Selection

    It was the publisher’s idea that I write RFID in the Supply Chain: A Guide to Selection and Implementation . Not only am I editor of Enterprise Inte- gration System , Second Edition Handbook and author of The Complete Book of Middleware , I also had some innovative business process and project management ideas on improving the effectiveness of integrating enterprise systems with information on product traceability, the scope of which has been widened by the RFID technology mandates. 

    標簽: Selection Supply Chain Guide RFID the in to

    上傳時間: 2020-06-08

    上傳用戶:shancjb

  • A Matrix Handbook for Statisticians

    書名《A Matrix Handbook for Statisticians》。矩陣方面的書籍

    標簽: Statisticians Handbook Matrix for

    上傳時間: 2020-10-05

    上傳用戶:

  • 基于ARM嵌入式平臺的X86譯碼SoC架構設計.pdf

    SoC(System On a Chip)又稱為片上系統(tǒng),是指將微處理器、模擬IP核、數(shù)字IP核和存儲器(或片外存儲器接口)集成在單一芯片上。SoC產品不斷朝著體積小、功能強的方向發(fā)展,芯片內部整合越來越多的功能。ARM架構作為嵌入式系統(tǒng)流行的應用,其應用的擴展面臨軟件擴充的問題,而X86平臺上卻有很多軟件資源。若將已有的X86軟件移植到ARM平臺,則可以在一定程度上解決軟件擴充的問題。 本論文針對X86指令在ARM中兼容的應用,以智能手機的應用為例,提出了基于ARM嵌入式平臺,使用X86指令到ARM指令的二進制翻譯模塊,達到對X86指令的兼容。主要研究ARM公司的片上總線系統(tǒng)——AMBA AHB和AMBA APB片上總線標準。對Multi-layer總線結構進行研究,分析了Multi-layer AHB系統(tǒng)中使用的Bus Matrix模塊的結構,從Bus Matrix模塊的內部矩陣結構和系統(tǒng)架構兩方面針對系統(tǒng)的特點作出優(yōu)化。 最后介紹了論文采用的事物級模型與Verilog HDL協(xié)同仿真的方法和系統(tǒng)的控制過程,通過仿真結果的比較,驗證了利用二進制翻譯模塊實現(xiàn)X86指令執(zhí)行的可行性和優(yōu)化后的架構較適合于X86翻譯系統(tǒng)的應用。

    標簽: ARM X86 SoC

    上傳時間: 2013-06-28

    上傳用戶:釣鰲牧馬

  • MATLAB 71

    MATLAB 的名稱源自 Matrix Laboratory ,它是一種科學計算軟件,專門以矩陣的形式處理數(shù)據(jù)。

    標簽: MATLAB 71

    上傳時間: 2013-05-25

    上傳用戶:waizhang

  • 基于FPGA的工頻干擾實時濾波技術

    生物醫(yī)學信號是源于一個生物系統(tǒng)的一類信號,像心音、腦電、生物序列和基因以及神經(jīng)活動等,這些信號通常含有與生物系統(tǒng)生理和結構狀態(tài)相關的信息,它們對這些系統(tǒng)狀態(tài)的研究和診斷具有很大的價值。信號拾取、采集和處理的正確與否直接影響到生物醫(yī)學研究的準確性,如何有效地從強噪聲背景中提取有用的生物醫(yī)學信號是信號處理技術的重要問題。    設計自適應濾波器對帶有工頻干擾的生物醫(yī)學信號進行濾波,從而消除工頻干擾,獲得最佳的濾波效果是本研究要解決的問題。生物醫(yī)學信號具有信號弱、噪聲強、頻率范圍較低、隨機性強等特點。由于心電(electrocardiogram,ECG)信號的確定性、穩(wěn)定性、規(guī)則性都比其他生物信號高,便于準確評估和檢測濾波效果,本研究采用ECG信號作為原始的模板信號。    本研究將新的電子芯片技術與現(xiàn)代信號處理技術相結合,從過去單一的軟件算法研究,轉向軟件與硬件結合,從而提高自適應速度和精度,而且可以使系統(tǒng)的開發(fā)周期縮短、成本降低、容易升級和變更。    采用現(xiàn)場可編程邏輯器件(Field Programmable Gate Array,F(xiàn)PGA)作為新的ECG快速提取算法的硬件載體,加快信號處理的速度。為了將ECG快速提取算法轉換為常用的適合于FPGA芯片的定點數(shù)算法,研究中詳細分析了定點數(shù)的量化效應對自適應噪聲消除器的影響,以及對浮點數(shù)算法和定點數(shù)算法的復合自適應濾波器的各種參數(shù)的選擇,如步長因子和字長選擇。研究中以定點數(shù)算法中的步長因子和字長選擇,作為FPGA設計的基礎,利用串并結合的硬件結構實現(xiàn)自適應濾波器,并得到了預期的效果,準確提取改善后的ECG信號。    研究中,在MATLAB(Matrix Laboratry)軟件的環(huán)境下模擬,選取帶有50Hz工頻干擾的不同信噪比的ECG原始信號,在浮點數(shù)情況下,原始信號通過采用最小均方LMS(LeastMean Squares)算法的浮點數(shù)自適應濾波器后,根據(jù)信噪比的改善和收斂速度,確定不同的最佳μ值,并在定點數(shù)情況下,在最佳μ值的情況下,原始信號通過采用LMs算法的定點數(shù)自適應濾波器后,根據(jù)信噪比的改善效果和采用硬件的經(jīng)濟性,確定最佳的定點數(shù)。并了解LMS算法中步長因子、定點數(shù)字長值對信號信噪比、收斂速度和硬件經(jīng)濟性的影響。從而得出針對含有工頻干擾的不同信噪比的原始ECG,應該采用什么樣的μ值和什么樣的定點數(shù)才能對原始ECG的改善和以后的硬件實現(xiàn)取得最佳的效果,并根據(jù)所得到的數(shù)據(jù)和結果,在FPGA上實現(xiàn)自適應濾波器,使自適應濾波器能對帶有工頻干擾的ECG原始信號有最佳的濾波效果。

    標簽: FPGA 工頻干擾 濾波技術

    上傳時間: 2013-04-24

    上傳用戶:gzming

  • 模擬信號鏈筆記

    In a world experiencing challenging transitions in multiple arenas—energy, healthcare, industry,finance, and security, to name a few—Maxim Integrated’s Industrial and Medical SolutionsGroup offers superior signal chain solutions that are innovative, accurate, and cost-effective.

    標簽: 模擬 信號鏈

    上傳時間: 2013-11-12

    上傳用戶:fanxiaoqie

  • RF至數(shù)字接收器的信號鏈噪聲分析

      Designers of signal receiver systems often need to performcascaded chain analysis of system performancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity of the receiver. An application’s noiserequirement has a signifi cant infl uence on the systemtopology, since the choice of topology strives to optimizethe overall signal-to-noise ratio, dynamic range andseveral other parameters. One problem in noise calculationsis translating between the various units used by thecomponents in the chain: namely the RF, IF/baseband,and digital (ADC) sections of the circuit.

    標簽: 數(shù)字接收器 信號鏈 噪聲分析

    上傳時間: 2014-12-05

    上傳用戶:cylnpy

  • 電源供應器與數(shù)字電位器校準應用筆記

    Abstract: A resistive feedback network is often used to set the output voltage of a power supply. A mechanical potentiometer (pot)conveniently solves the problem of adjusting a power supply. For easier automatic calibration, a mechanical pot can be replaced witha digital pot. This application note presents a calibration solution that uses a digital pot, because digipots are smaller, do not movewith age or vibration, and can be recalibrated remotely. This proposed solution reduces the susceptibility of the system to thetolerance of the digital pot's end-to-end resistance, making the solution optimal fordesigners. This application note also explainssome of the equations required to calculate the resistor chain values and to use a digital pot in this way. A spreadsheet withstandard reisistor values is available for easy calculations.

    標簽: 電源供應器 數(shù)字電位器 應用筆記 校準

    上傳時間: 2013-10-31

    上傳用戶:caiguoqing

  • PCF8578 LCD圖形點陣液晶驅動器芯片簡介及封裝庫

    The PCF8578 is a low power CMOS1 LCD row and column driver, designed to drive dotmatrix graphic displays at multiplex rates of 1:8, 1:16, 1:24 or 1:32. The device has40 outputs, of which 24 are programmable and configurable for the following ratios ofrows/columns: 32¤8, 24¤16, 16¤24 or 8¤32. The PCF8578 can function as a stand-alone LCDcontroller and driver for use in small systems. For larger systems it can be used inconjunction with up to 32 PCF8579s for which it has been optimized. Together these twodevices form a general purpose LCD dot matrix driver chip set, capable of driving displaysof up to 40960 dots. The PCF8578 is compatible with most microcontrollers andcommunicates via a two-line bidirectional bus (I2C-bus). Communication overhead isminimized by a display RAM with auto-incremented addressing and display bankswitching.

    標簽: 8578 PCF LCD 圖形點陣

    上傳時間: 2013-10-23

    上傳用戶:頂?shù)弥?/p>

  • LLCR Pin Socket Testing with t

    LLCR Pin Socket Testing with the Model 3732 High Density Matrix Card Computer processors (CPUs) today have come a long way from the computer processors of the past. They draw more power, run at lower voltages, and have more pins than ever before.

    標簽: Testing Socket LLCR with

    上傳時間: 2013-10-24

    上傳用戶:whenfly

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