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  • MATLAB 71

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

    標(biāo)簽: MATLAB 71

    上傳時(shí)間: 2013-05-25

    上傳用戶:waizhang

  • 基于FPGA的工頻干擾實(shí)時(shí)濾波技術(shù)

    生物醫(yī)學(xué)信號(hào)是源于一個(gè)生物系統(tǒng)的一類信號(hào),像心音、腦電、生物序列和基因以及神經(jīng)活動(dòng)等,這些信號(hào)通常含有與生物系統(tǒng)生理和結(jié)構(gòu)狀態(tài)相關(guān)的信息,它們對(duì)這些系統(tǒng)狀態(tài)的研究和診斷具有很大的價(jià)值。信號(hào)拾取、采集和處理的正確與否直接影響到生物醫(yī)學(xué)研究的準(zhǔn)確性,如何有效地從強(qiáng)噪聲背景中提取有用的生物醫(yī)學(xué)信號(hào)是信號(hào)處理技術(shù)的重要問題。    設(shè)計(jì)自適應(yīng)濾波器對(duì)帶有工頻干擾的生物醫(yī)學(xué)信號(hào)進(jìn)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(xué)信號(hào)具有信號(hào)弱、噪聲強(qiáng)、頻率范圍較低、隨機(jī)性強(qiáng)等特點(diǎn)。由于心電(electrocardiogram,ECG)信號(hào)的確定性、穩(wěn)定性、規(guī)則性都比其他生物信號(hào)高,便于準(zhǔn)確評(píng)估和檢測(cè)濾波效果,本研究采用ECG信號(hào)作為原始的模板信號(hào)。    本研究將新的電子芯片技術(shù)與現(xiàn)代信號(hào)處理技術(shù)相結(jié)合,從過去單一的軟件算法研究,轉(zhuǎn)向軟件與硬件結(jié)合,從而提高自適應(yīng)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(jí)和變更。    采用現(xiàn)場(chǎng)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(hào)處理的速度。為了將ECG快速提取算法轉(zhuǎn)換為常用的適合于FPGA芯片的定點(diǎn)數(shù)算法,研究中詳細(xì)分析了定點(diǎn)數(shù)的量化效應(yīng)對(duì)自適應(yīng)噪聲消除器的影響,以及對(duì)浮點(diǎn)數(shù)算法和定點(diǎn)數(shù)算法的復(fù)合自適應(yīng)濾波器的各種參數(shù)的選擇,如步長(zhǎng)因子和字長(zhǎng)選擇。研究中以定點(diǎn)數(shù)算法中的步長(zhǎng)因子和字長(zhǎng)選擇,作為FPGA設(shè)計(jì)的基礎(chǔ),利用串并結(jié)合的硬件結(jié)構(gòu)實(shí)現(xiàn)自適應(yīng)濾波器,并得到了預(yù)期的效果,準(zhǔn)確提取改善后的ECG信號(hào)。    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(hào),在浮點(diǎn)數(shù)情況下,原始信號(hào)通過采用最小均方LMS(LeastMean Squares)算法的浮點(diǎn)數(shù)自適應(yīng)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(diǎn)數(shù)情況下,在最佳μ值的情況下,原始信號(hào)通過采用LMs算法的定點(diǎn)數(shù)自適應(yīng)濾波器后,根據(jù)信噪比的改善效果和采用硬件的經(jīng)濟(jì)性,確定最佳的定點(diǎn)數(shù)。并了解LMS算法中步長(zhǎng)因子、定點(diǎn)數(shù)字長(zhǎng)值對(duì)信號(hào)信噪比、收斂速度和硬件經(jīng)濟(jì)性的影響。從而得出針對(duì)含有工頻干擾的不同信噪比的原始ECG,應(yīng)該采用什么樣的μ值和什么樣的定點(diǎn)數(shù)才能對(duì)原始ECG的改善和以后的硬件實(shí)現(xiàn)取得最佳的效果,并根據(jù)所得到的數(shù)據(jù)和結(jié)果,在FPGA上實(shí)現(xiàn)自適應(yīng)濾波器,使自適應(yīng)濾波器能對(duì)帶有工頻干擾的ECG原始信號(hào)有最佳的濾波效果。

    標(biāo)簽: FPGA 工頻干擾 濾波技術(shù)

    上傳時(shí)間: 2013-04-24

    上傳用戶:gzming

  • 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(biāo)簽: Testing Socket LLCR with

    上傳時(shí)間: 2013-10-24

    上傳用戶:whenfly

  • 用于刀具自動(dòng)識(shí)別與實(shí)時(shí)追蹤技術(shù)的研究

    為了提高中小型制造企業(yè)的刀具管理水平,對(duì)刀具的自動(dòng)識(shí)別與追蹤技術(shù)進(jìn)行了研究,最終確定Data Matrix二維碼用于刀具的自動(dòng)識(shí)別與追蹤技術(shù)。實(shí)際應(yīng)用表明,該技術(shù)優(yōu)化了刀具資源管理過程,諸如減少刀具的加工準(zhǔn)備時(shí)間等,加強(qiáng)了企業(yè)底層資源信息的采集與處理能力,降低了企業(yè)用刀成本,最終提高了企業(yè)生產(chǎn)率和綜合競(jìng)爭(zhēng)力。

    標(biāo)簽: 刀具 自動(dòng)識(shí)別 追蹤

    上傳時(shí)間: 2013-12-20

    上傳用戶:huaidan

  • matlab 7.0軟件下載(免費(fèi)破解版)

    matlab 7.0軟件下載(免費(fèi)破解版):Matlab作為美國(guó) MathWorks公司開發(fā)的用于概念設(shè)計(jì),算法開發(fā),建模仿真,實(shí)時(shí)實(shí)現(xiàn)的理想的集成環(huán)境。是目前最好的科學(xué)計(jì)算類軟件。 作為和Mathematica、Maple并列的三大數(shù)學(xué)軟件。其強(qiáng)項(xiàng)就是其強(qiáng)大的矩陣計(jì)算以及仿真能力。要知道Matlab的由來就是Matrix + Laboratory = Matlab,所以這個(gè)軟件在國(guó)內(nèi)也被稱作《矩陣實(shí)驗(yàn)室》。 每次MathWorks發(fā)布Matlab的同時(shí)也會(huì)發(fā)布仿真工具Simulink。在歐美很多大公司在將產(chǎn)品投入實(shí)際使用之前都會(huì)進(jìn)行仿真試驗(yàn),他們所主要使用的仿真軟件就是Simulink。 Matlab提供了自己的編譯器:全面兼容C以及Fortran兩大語(yǔ)言。 所以Matlab是工程師,科研工作者手上最好的語(yǔ)言,最好的工具和環(huán)境。 注:由于軟件較大,請(qǐng)?jiān)谙螺d地址上,右鍵選擇迅雷或快車進(jìn)行下載。否則可能會(huì)出現(xiàn)服務(wù)器忙。限制了同時(shí)下載人數(shù),請(qǐng)下載時(shí)等待時(shí)機(jī)即可。

    標(biāo)簽: matlab 7.0 軟件

    上傳時(shí)間: 2014-03-19

    上傳用戶:不懂夜的黑

  • WP264-在數(shù)字視頻應(yīng)用中使用CPLD

      The CoolRunner-II CPLD is a highly uniform family of fast, low-power devices. Theunderlying architecture is a traditional CPLD architecture, combining macrocells intofunction blocks interconnected with a global routing matrix, the Xilinx AdvancedInterconnect Matrix (AIM). The function blocks use a PLA configuration that allowsall product terms to be routed and shared among any of the macrocells of the functionblock.

    標(biāo)簽: CPLD 264 WP 數(shù)字

    上傳時(shí)間: 2013-11-03

    上傳用戶:1037540470

  • This a Bayesian ICA algorithm for the linear instantaneous mixing model with additive Gaussian noise

    This a Bayesian ICA algorithm for the linear instantaneous mixing model with additive Gaussian noise [1]. The inference problem is solved by ML-II, i.e. the sources are found by integration over the source posterior and the noise covariance and mixing matrix are found by maximization of the marginal likelihood [1]. The sufficient statistics are estimated by either variational mean field theory with the linear response correction or by adaptive TAP mean field theory [2,3]. The mean field equations are solved by a belief propagation method [4] or sequential iteration. The computational complexity is N M^3, where N is the number of time samples and M the number of sources.

    標(biāo)簽: instantaneous algorithm Bayesian Gaussian

    上傳時(shí)間: 2013-12-19

    上傳用戶:jjj0202

  • For the incomplete methods, we kept the representation of the queens by a table and the method of ca

    For the incomplete methods, we kept the representation of the queens by a table and the method of calculation to determine if two queens are in conflict, which is much faster for this kind of problems than the representation by a matrix. heuristics: descent. Tests: 100 queens in less than 1 second and 67 iterations. 500 queens in 1 second and 257 iterations. 1000 queens in 11 seconds and 492 iterations. heuristics: Simulated annealing. Tests: 100 queens in less than 1 second and 47 iterations. 500 queens in 5 seconds and 243 iterations. 1000 queens in 13 seconds and 497 iterations. heuristics: based on Simulated Annealing. Tests: 100 queens in less than 1 second and 60 iterations. 500 queens in 1 second and 224 iterations. 1000 queens in 5 seconds and 459 iterations. 10 000 queens in 20 minutes 30 seconds and 4885 iterations.

    標(biāo)簽: the representation incomplete methods

    上傳時(shí)間: 2015-05-05

    上傳用戶:1159797854

  • The module LSQ is for unconstrained linear least-squares fitting. It is based upon Applied Statisti

    The module LSQ is for unconstrained linear least-squares fitting. It is based upon Applied Statistics algorithm AS 274 (see comments at the start of the module). A planar-rotation algorithm is used to update the QR- factorization. This makes it suitable for updating regressions as more data become available. The module contains a test for singularities which is simpler and quicker than calculating the singular-value decomposition. An important feature of the algorithm is that it does not square the condition number. The matrix X X is not formed. Hence it is suitable for ill- conditioned problems, such as fitting polynomials. By taking advantage of the MODULE facility, it has been possible to remove many of the arguments to routines. Apart from the new function VARPRD, and a back-substitution routine BKSUB2 which it calls, the routines behave as in AS 274.

    標(biāo)簽: least-squares unconstrained Statisti Applied

    上傳時(shí)間: 2015-05-14

    上傳用戶:aig85

  • 《精通MATLAB7.0混合編程》系統(tǒng)地介紹MATLAB 7.0的混合編程方法和技巧。全書共分為13章。第1章和第2章介紹MATLAB的基礎(chǔ)知識(shí)

    《精通MATLAB7.0混合編程》系統(tǒng)地介紹MATLAB 7.0的混合編程方法和技巧。全書共分為13章。第1章和第2章介紹MATLAB的基礎(chǔ)知識(shí),第3章簡(jiǎn)要介紹MATLAB混合編程,第4章至第9章分別介紹幾種典型的混合編程方法,包括C-MEX、MATLAB引擎、MAT數(shù)據(jù)文件共享、Mideva、Matrix和Add-in。第10章、第11章介紹MATLAB與Delphi和Excel的混合編程。第12章介紹MATLAB COM Builder,第13章以圖像處理為例介紹了一個(gè)綜合應(yīng)用實(shí)例。 本書按混合編程的具體方法進(jìn)行邏輯編排,自始至終用實(shí)例描述,每章著重闡述各種混合編程方法的實(shí)質(zhì)和要點(diǎn),同時(shí)穿插了作者多年使用MATLAB的經(jīng)驗(yàn)和體會(huì)。本書既適合初學(xué)者自學(xué),也適用于高級(jí)MATLAB用戶,可作為高等數(shù)學(xué)、計(jì)算機(jī)、電子工程、數(shù)值分析、信息工程等課程的教學(xué)參考書,也可供上述領(lǐng)域的科研工作者參考。 這里是本書所有源碼壓縮包,內(nèi)容詳盡、實(shí)例豐富,包含MATLAB實(shí)例的源文件、函數(shù)/命令和注解以及程序?qū)嵗?/p>

    標(biāo)簽: MATLAB 7.0 混合編程

    上傳時(shí)間: 2013-12-19

    上傳用戶:1051290259

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