Use the fast Fourier transform function fft to analyse following signal. Plot the original signal, and the magnitude of its spectrum linearly and logarithmically. Apply Hamming window to reduce the leakage. . The hamming window can be coded in Matlab as for n=1:N hamming(n)=0.54+0.46*cos((2*n-N+1)*pi/N); end; where N is the data length in the FFT.
標簽： matlab fft
上傳時間： 2015-11-23
上傳用戶：石灰巖123
Computational models are commonly used in engineering design and scientific discovery activities for simulating complex physical systems in disciplines such as fluid mechanics, structural dynamics, heat transfer, nonlinear structural mechanics, shock physics, and many others. These simulators can be an enormous aid to engineers who want to develop an understanding and/or predictive capability for complex behaviors typically observed in the corresponding physical systems. Simulators often serve as virtual prototypes, where a set of predefined system parameters, such as size or location dimensions and material properties, are adjusted to improve the performance of a system, as defined by one or more system performance objectives. Such optimization or tuning of the virtual prototype requires executing the simulator, evaluating performance objective(s), and adjusting the system parameters in an iterative, automated, and directed way. System performance objectives can be formulated, for example, to minimize weight, cost, or defects; to limit a critical temperature, stress, or vibration response; or to maximize performance, reliability, throughput, agility, or design robustness. In addition, one would often like to design computer experiments, run parameter studies, or perform uncertainty quantification (UQ). These approaches reveal how system performance changes as a design or uncertain input variable changes. Sampling methods are often used in uncertainty quantification to calculate a distribution on system performance measures, and to understand which uncertain inputs contribute most to the variance of the outputs. A primary goal for Dakota development is to provide engineers and other disciplinary scientists with a systematic and rapid means to obtain improved or optimal designs or understand sensitivity or uncertainty using simulationbased models. These capabilities generally lead to improved designs and system performance in earlier design stages, alleviating dependence on physical prototypes and testing, shortening design cycles, and reducing product development costs. In addition to providing this practical environment for answering system performance questions, the Dakota toolkit provides an extensible platform for the research and rapid prototyping of customized methods and meta-algorithms
標簽： Optimization and Uncertainty Quantification
上傳時間： 2016-04-08
上傳用戶：huhu123456
該代碼用于視頻中背景與前景的分離 Run "TestGoDec" firstly for testing the background modeling by GoDec on Hall dataset. Run "TestSSGoDec" firstly for testing the background modeling by Semi-Soft GoDec on Hall dataset. The time cost on my PC is 8.75s, which is >4 times faster than ordinary GoDec.
標簽： GoDec
上傳時間： 2016-04-25
上傳用戶：shiaijianjun
[開源 綠色軟件] [運行環境 Windows XP/7/8/10] [語言 簡體/繁體/English/Unicode] A cool music player. Powered by Bass and BassVis. 極簡本地音樂播放器，透明、純文本界面。支持輕媒體庫、歌詞、可視化。最小化到托盤，占用資源少，適合邊聽音樂邊工作。 應網友要求，加入了Tag編輯、自動切換列表、播放隊列、鼠標手勢、均衡器、音頻設備選擇、全局音量滾輪（托盤區域）、字體設置、極簡模式、鼠標穿透、嵌入桌面、簡單布局等功能。 homepage> mcool.appinn.me ==================================================== 音頻格式APE、FLAC、WavPack、MP3、OGG、TTA、TAK、Musepack、AAC、AC3、WMA、Wav、CD、ALAC、Aiff、MOD、CUE ==================================================== 更新歷史: 3336 -2016.3.25 點睛之筆：任意布局（追上foobar2000）。Arbitrary layout (all in one). 3330 -2016.3.10 一體布局之比例調節（初具foobar2000風貌）。Ratio adjust (all in one). 3308 -2015.11.28 歌詞微調（在選項>常規>鼠標手勢里設置）。Adds function of lyrics tuning. 3306 -2015.11.15 電臺模式（整點時切換歌曲或列表，并非在線音樂），以及多聲卡支持。Adds radio mode, and multi sound card support. 3300 -2015.10.15 完善細節，修復切歌卡住bug。完美版。Fixes some bugs. 3280 -2015.8.1 簡單布局功能。Layout (all in one) function. 3260 -2015.6.1 Win10模式。Win10 mode. 3252 -2015.5.10 任務欄進度條。Taskbar progress display. 3236 -2015.4.10 點睛之筆：透明度調節。Adds function of transparency tuning. 3232 -2015.3.25 自定義軟件名（請在mcool.ini中手動修改）。Adds function of customizing app name. 3230 -2015.3.12 Airplay復刻界面。Airplay interface copy. 3218 -2015.1.20 桌面歌詞。Desktop lyrics. 3216 -2015.1.12 一體化界面（學習Foobar2000和豆瓣FM）。All in one interface. 3212 -2015.1.6 新增Winamp音效插件支持（學習千千靜聽），以及滾輪穿透功能（學習Airplay3）。Adds Winamp DSP plugins support, and adds function of wheel transparent. Winamp音效插件下載：http://uploadgeneration.info/Winamp/www.winamp.com/plugins/dsp-effect/5/top-rated.html 3210 -2014.12.28 重要更新：本地音量調節、自定義鼠標鍵/手勢。Adds local volume control, and adds fuction of customizing mouse control / gesture. 3208 -2014.11.25 簡化右鍵菜單，常規項目移到選項窗口。Simplifies the popup menu, moves the general items to option window. 3206 -2014.11.22 新增文本對齊選項，重新設計導航按鈕。Adds option of text alignment, and redesigns the buttons of playback. 3202 -2014.11.10 新增播放記憶、片段循環（Hotkey: Ctrl+1/2）和貼邊隱藏功能。Adds functions of playback memory, AB repeat and screen side hide. 3200 -2014.11.5 新增無界面選項（先去掉托盤圖標，然后Ctrl+Alt+W隱藏界面，Ctrl+Alt+X關閉）。Adds option of no interface. 3191 -2014.8.26 嵌入桌面。Pins to desktop. 3190 -2014.8.19 音樂管理第一步：列表分組。Playlists grouping. 3186 -2014.8.10 基于列表的分級系統（Hotkey:0..5）。Rating system based on playlist. 3181 -2014.8.1 啟用新圖標（由虹吸墨作者BGLL友情制作）。Uses the new icon. 3180 -2014.7.22 新增Win7任務欄特效。Adds windows 7 taskbar effect. 3166 -2014.6.29 重要更新：自動下載專輯封面（源于歌詞迷）。Downloads album covers from geci.me. 3160 -2014.6.1 重要更新：新增極簡模式，以及OGG/Opus內置封面顯示功能。Adds minimalist mode, and adds function of displaying cover embedded in OGG/Opus. 3152 -2014.5.18 添加托盤右鍵菜單，新增MP4/M4A(ALAC)內置封面顯示功能。Adds systray popup menu, and adds function of displaying cover embedded in MP4/M4A(ALAC). 3151 -2014.5.1 重新設計可視化效果，新增示波器效果。Redesigns visual effects, and adds oscilloscope effect. 3150 -2014.4.20 采用歌詞迷API下載歌詞。Downloads lyrics from geci.me. 3136 -2014.3.30 加入可選的按鈕，以及鼠標穿透功能。Adds function of transparent window. 3132 -2014.3.6 簡化界面，向Foobar2K看齊；增加正在播放面板。Simplifies the interface, and adds now playing panel. 3130 -2014.2.26 重要更新：按照專輯分組。Grouping by album. 3120 -2014.2.18 優化字體渲染（Windows7/8下）。Optimizes font rendering in Windows 7/8. 3110 -2014.1.26 點睛之筆：自定義字體顏色。Adds function of customizing font color. 3108 -2013.11.16 Last.fm同步功能（請到主頁下載插件）。Last.fm scrobbler support. 3106 -2013.11.8 可回溯的隨機播放（學習Airplay 2）。Random playback can be traced back. 3103 -2013.10.12 優化右鍵菜單。Optimizes popup menu. 3102 -2013.9.30 修改滾動條樣式，增加音頻緩沖選項。Modifies style of scroll bar, and adds option of audio buffer length. 3100 -2013.9.10 無邊框設計；迷你模式也可以不置頂（Hotkey:T）。Borderless designs. 3086 -2013.8.20 增加歌詞面板功能。Adds function of lyrics panel. 3082 -2013.8.08 增加在可視化界面顯示歌詞功能。Adds function of displaying lyrics on visual interface. 3080 -2013.8.01 新增設置字體功能，恢復簡單的自動關機功能。Adds function of setting font, and re-adds simple function of auto shutdown. 3060 -2013.6.26 修復在迷你模式停止響應的Bug，去掉自動關機、歌詞調整功能。Fixes bug of stop responding in mini mode, and removes functions of auto shutdown and lyrics trimming. 3050 -2013.5.23 增加手勢功能。Adds gesture function. 3030 -2013.3.10 增加Aero磨砂玻璃效果[如需源碼請聯系我]，XP/Win7/8無差別顯示，按Insert鍵開啟。Adds aero glass effect. 3020 -2013.2.23 增加簡易Tag編輯功能（選中并單擊即可，相當于資源管理器中的重命名，按照[歌手 - 歌名][專輯]格式進行編輯）。Adds function of editing audio tags (select and click, edit with [artist - title][album] format). 3010 -2013.1.23 應網友要求，加入讀取內嵌CUE、歌詞及專輯封面功能。Adds function of reading CUE, LRC and album cover built in media. 3002 -2012.11.03 無按鈕設計；微調進度條尺寸。Buttonless design; modifies the size of the progress bar. 3001 -2012.10.15 重要改進，界面即按鈕：單擊 - 播放/暫停，按住 - 前進。Important update, the interface is a button: Click - Play/Pause, Hold Down - Next. 3000 -2012.9.28 增加Win8模式。Adds Win8 mode option. 2982 -2012.8.26 在Win8下使用微軟雅黑字體。Uses Microsoft YaHei font in Windows 8 CHS. 2981 -2012.8.20 視頻以插件提供（請到主頁下載），增加單曲循環功能。Adds function of repeat track. 2980 -2012.7.26 簡化代碼，去掉視頻和MIDI支持。Removes the video and MIDI support. 2970 -2012.7.20 增加媒體信息顯示功能。Adds function of displaying media info. 2960 -2012.6.28 增加專輯封面顯示功能（Hotkey:Ins）。Adds function of displaying album cover. 2956 -2012.6.01 再次簡化界面。Simplifies the interface again. 2952 -2012.4.28 增加音頻設備選擇功能：DS、ASIO、WASAPI。Adds function of selecting playback device. 2950 -2012.3.30 *增加滾輪調節音量功能（在托盤，中鍵靜音）和媒體鍵支持。Adds function of setting volume by mouse wheel (over systray, middle click to mute), and adds multimedia keys support. 2936 -2012.3.17 微調界面，修復物理刪除失效的BUG。Fine-tunes the interface, and restores the physical delete function. 2930 -2012.2.27 增加TAK格式支持。Adds TAK format support. 2923 -2012.2.12 緊急修復上一版出現的字體模糊BUG（Vista/Win7下），增加在任務欄顯/隱圖標功能（Ctrl+T）。Fixes font vague bug for Vista/Win7, and adds showing/hiding icon on taskbar function. 2920 -2012.2.08 微調界面，優化CPU占用（啟用背景圖片時）。Fine-tunes the interface, and optimizes CPU utilization (while enable background image). 2912 -2012.1.12 增加播放隊列功能。Adds playback queue function. 2910 -2011.12.25 改進迷你模式，增加查找功能。Improves mini mode, and adds find function. *注：此功能對殺毒軟件過敏，開啟方法：按F1進入選項，勾選全局快捷鍵。The feature is allergic to the anti-virus software.
上傳時間： 2016-06-10
上傳用戶：fanghua
The AP2406 is a 1.5Mhz constant frequency, slope compensated current mode PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell lithium-Ion (Li+) battery. The AP2406 can supply 600mA of load current from a 2.5V to 5.5V input voltage. The output voltage can be regulated as low as 0.6V. The AP2406 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. Idle mode operation at light loads provides very low output ripple voltage for noise sensitive applications. The AP2406 is offered in a low profile (1mm) 5-pin, thin SOT package, and is available in an adjustable version and fixed output voltage of 1.2V, 1.5V and 1.8V
上傳時間： 2017-02-23
上傳用戶：w124141
function [Rs,Ps]=move_corr(X,Y,a) %%%--- this function is for moving correlation %%%--- X,Y is the imput data, a is the length of the moving window %%%--- Rs is the spwarman correlation coeffcient, Ps is the p_vaue
上傳時間： 2017-12-27
上傳用戶：Clocks
是否要先打開ALLEGRO? 不需要(當然你的機器須有CADENCE系統)。生成完封裝后在你的輸出目錄下就會有幾千個器件（全部生成的話）,默認輸出目錄為c:\MySym\. Level里面的Minimum, Nominal, Maximum 是什么意思？ 對應ipc7351A的ABC封裝嗎？ 是的 能否將MOST, NOMINAL, LEAST三種有差別的封裝在命名上也體現出差別？ NOMINAL 的名稱最后沒有后綴，MOST的后綴自動添加“Ｍ”，LEAST的后綴自動添加“L”，你看看生成的庫名稱就知道了。（直插件以及特別的器件，如BGA等是沒有MOST和LEAST級別的，對這類器件只有NOMINAL） IC焊盤用長方形好像比用橢圓形的好，能不能生成長方形的？ 嗯。。。。基本上應該是非直角的焊盤比矩形的焊盤好，我記不得是AMD還是NS還是AD公司專門有篇文檔討論了這個問題，如果沒有記錯的話至少有以下好處：信號質量好、更省空間（特別是緊密設計中）、更省錫量。我過去有一篇帖子有一個倒角焊盤的SKILL，用于晶振電路和高速器件（如DDR的濾波電容)，原因是對寬度比較大的矩形用橢圓焊盤也不合適，這種情況下用自定義的矩形倒角焊盤就比較好了－－－你可以從網上另外一個DDR設計的例子中看到。 當然，我已經在程序中添加了一選擇項，對一些矩形焊盤可以選擇倒角方式. 剛才試了一下，感覺器件的命名的規范性不是太好，另好像不能生成器件的DEVICE文件，我沒RUN完。。。 這個程序的命名方法基本參照IPC-7351，每個人都有自己的命名嗜好，仍是不好統一的；我是比較懶的啦，所以就盡量靠近IPC-7351了。 至于DEVICE，的選項已經添加 (這就是批量程序的好處，代碼中加一行，重新生產的上千上萬個封裝就都有新東西了)。 你的庫都是"-"的,請問用過ALLEGRO的兄弟,你們的FOOTPRINT認"-"嗎?反正我的ALLEGRO只認"_"(下劃線) 用“－”應該沒有問題的，焊盤的命名我用的是"_"（這個一直沒改動過）。 部分絲印畫在焊盤上了。 絲印的問題我早已知道，只是盡量避免開（我有個可配置的SilkGap變量）,不過工作量比較大，有些已經改過，有些還沒有；另外我沒有特別費功夫在絲印上的另一個原因是，我通常最后用AUTO-SILK的來合并相關的層，這樣既方便快捷也統一各個器件的絲印間距，用AUTO-SILK的話絲印線會自動避開SOLDER-MASK的。 點擊allegro后命令行出現E- Can't change to directory: Files\FPM，什么原因？ 我想你一定是將FPM安裝在一個含空格的目錄里面了，比如C:\Program Files\等等之類，在自定義安裝目錄的時候該目錄名不能含有空格，且存放生成的封裝的目錄名也不能含有空格。你如果用默認安裝的話應該是不會有問題的, 默認FPM安裝在C:\FPM，默認存放封裝的目錄為C:\MYSYM 0.04版用spb15.51生成時.allegro會死機.以前版本的Allegro封裝生成器用spb15.51生成時沒有死機現象 我在生成MELF類封裝的時候有過一次死機現象，估計是文件操作錯誤導致ALLEGRO死機，原因是我沒有找到在ｓｋｉｌｌ里面直接生成SHAPE焊盤的方法（FLASH和常規焊盤沒問題）, 查了下資料也沒有找到解決方法，所以只得在外部調用SCRIPT來將就一下了。（下次我再查查看），用SCRIPT的話文件訪問比較頻繁（幸好目前MELF類的器件不多）. 解決辦法： １、對MELF類器件單獨選擇生成，其它的應該可以一次生成。 ２、試試最新的版本(當前0.05) 請說明運行在哪類器件的時候ALLEGRO出錯，如果不是在MELF附近的話，請告知，謝謝。 用FPM0.04生成的封裝好像文件都比較大，比如CAPC、RES等器件，都是300多K，而自己建的或采用PCB Libraries Eval生成的封裝一般才幾十K到100K左右，不知封裝是不是包含了更多的信息？ 我的每個封裝文件包含了幾個文字層（REF,VAL,TOL,DEV,PARTNUMBER等),SILK和ASSEM也是分開的，BOND層和高度信息，還有些定位線(在DISP層）,可能這些越來越豐富的信息加大了生成文件的尺寸.你如果想看有什么內容的話，打開所有層就看見了（或REPORT） 非常感謝 LiWenHui 發現的BUG, 已經找到原因，是下面這行： axlDBChangeDesignExtents( '((-1000 -1000) (1000 1000))) 有尺寸空間開得太大，后又沒有壓縮的原因，現在生成的封裝也只有幾十K了，0.05版已經修復這個BUG了。 Allegro封裝生成器0.04生成do-27封裝不正確,生成封裝的焊盤的位號為a,c.應該是A,B或者1,2才對. 呵呵，DIODE通常管腳名為AC(A = anode, C = cathode) 也有用AK 或 12的， 極少見AB。 除了DIODE和極個別插件以及BGA外，焊盤名字以數字為主, 下次我給DIODE一個選擇項，可以選擇AC 或 12 或 AK, 至于TRANSISTER我就不去區分BCE/CBE/ECB/EBC/GDS/GSD/DSG/DGS/SGD/SDG等了，這樣會沒完沒了的，我將對TRANSISTER強制統一以數字編號了，如果用家非要改變，只得在生成庫后手工修改。
標簽： Footprint Maker 0.08 FPM skill
上傳時間： 2018-01-10
上傳用戶：digitzing
% Computation of ST-ZCR and STE of a speech signal. % % Functions required: zerocross, sgn, winconv. % % Author: Nabin Sharma % Date: 2009/03/15 [x,Fs] = wavread('so.wav'); % word is: so x = x.'; N = length(x); % signal length n = 0:N-1; ts = n*(1/Fs); % time for signal % define the window wintype = 'rectwin'; winlen = 201; winamp = [0.5,1]*(1/winlen);
標簽： 短時過零率和短時能量
上傳時間： 2019-09-23
上傳用戶：minwenji
nx=length(x(:)); if nargin<2 || isempty(win) win=nx; end if nargin<4 || isempty(m) m=''; end nwin=length(win); if nwin == 1 lw = win; w = ones(1,lw); else lw = nwin; w = win(:)'; end
標簽： 能頻值
上傳時間： 2019-09-23
上傳用戶：minwenji
transimpedance linearization circuitry. This allows it to drive video loads with excellent differential gain and phase perfor mance on only 50 mW of power. The AD8001 is a current feedback amplifier and features gain flatness of 0.1 dB to 100 MHz while offering differential gain and phase error of 0.01% and 0.025°. This makes the AD8001 ideal for professional video electronics such as cameras and video switchers. Additionally, the AD8001’s low distortion and fast settling make it ideal for buffer high-speed A-to-D converters. The AD8001 offers low power of 5.5 mA max (VS = ±5 V) and can run on a single +12 V power supply, while being capable of delivering over 70 mA of load current. These features make this amplifier ideal for portable and battery-powered applications where size and power are critical. The outstanding bandwidth of 800 MHz along with 1200 V/μs of slew rate make the AD8001 useful in many general purpose high-speed applications where dual power supplies of up to ±6 V and single supplies from 6 V to 12 V are needed. The AD8001 is available in the industrial temperature range of –40°C to +85°C.
上傳時間： 2020-04-21
上傳用戶：su1254
