Welch法:Welch法對Bartlett法進行了兩方面的修正:一是選擇適當?shù)拇昂瘮?shù)w(n),并在周期圖計算前直接加進去,加窗的優(yōu)點是無論什么樣的窗函數(shù)均可使譜估計非負。二是在分段時,可使各段之間有重疊,這樣會使方差減小。
上傳時間: 2016-03-03
上傳用戶:xcy122677
javascript範例show 表單設計.動態(tài)表現(xiàn)
標簽: javascript show
上傳時間: 2016-07-02
上傳用戶:pompey
dsp hư ớ ng dẫ n giao tiế p LCD code viế t bằ ng C
上傳時間: 2017-06-17
上傳用戶:xuanjie
c++ Ngô n ngữ C cho vi đ iề u khiể n Các tài liệ u tham khả o, ebook. Programming Microcontrollers in C (Ted Van Sickle) C Programming for Microcontrollers (Joe Pardue SmileyMicros.com ) Programming 16-Bit PIC Microcontrollers in C (Jucio di jasio ) C Programming for AVR Programming embedded system I,II (Michael J . Pont ) ( các tài liệ u này đ ã down load về )
上傳時間: 2017-07-29
上傳用戶:壞壞的華仔
·詳細說明:h.264 source codes , the x264 is the most effience t e. and the codes are the newst codes . you c a n compile ti using VC 文件列表: x264 ....\AUTHORS ....\build ....\
上傳時間: 2013-07-31
上傳用戶:zhang97080564
設計方案包含了TI的超低功耗微控制器MSP430、安華科技(Avago)的超低功耗光電鼠標傳感器ADNS—3040及TI 27 MHz發(fā)射機TRF7950等功能模塊。為了涵蓋設計中的所有方面,還討論了相應的USB接收適配器的解決方案。作為一個完整的設計參考,此應用報告提供了完備的硬件原理圖、材料清單及MSP430發(fā)射機的源代碼。
上傳時間: 2013-10-17
上傳用戶:kxyw404582151
微電腦型單相交流集合式電表(單相二線系統(tǒng)) 特點: 精確度0.25%滿刻度±1位數(shù) 可同時量測與顯示交流電壓,電流,頻率,瓦特,(功率因數(shù)/視在功率) 交流電壓,電流,瓦特皆為真正有效值(TRMS) 交流電流,瓦特之小數(shù)點可任意設定 瓦特單位W或KW可任意設定 CT比可任意設定(1至999) 輸入與輸出絕緣耐壓 2仟伏特/1分鐘( 突波測試強度4仟伏特(1.2x50us) 數(shù)位RS-485界面 (Optional) 主要規(guī)格: 精確度: 0.1% F.S.±1 digit (Frequency) 0.25% F.S.±1 digit(ACA,ACV,Watt,VA) 0.25% F.S. ±0.25o(Power Factor) (-.300~+.300) 輸入負載: <0.2VA (Voltage) <0.2VA (Current) 最大過載能力: Current related input: 3 x rated continuous 10 x rated 30 sec. 25 x rated 3sec. 50 x rated 1sec. Voltage related input: maximum 2 x rated continuous 過載顯示: "doFL" 顯示值范圍: 0~600.0V(Voltage) 0~999.9Hz(Frequency)(<20% for voltage input) 0~19999 digit adjustable(Current,Watt,VA) 取樣時間: 2 cycles/sec. RS-485通訊位址: "01"-"FF" RS-485傳輸速度: 19200/9600/4800/2400 selective RS-485通信協(xié)議: Modbus RTU mode 溫度系數(shù): 100ppm/℃ (0-50℃) 顯示幕: Red high efficiency LEDs high 10.16 mm(0.4") 參數(shù)設定方式: Touch switches 記憶型式: Non-volatile E²PROM memory 絕緣抗阻: >100Mohm with 500V DC 絕緣耐壓能力: 2KVac/1 min. (input/output/power) 1600 Vdc (input/output) 突波測試: ANSI c37.90a/1974,DIN-IEC 255-4 impulse voltage 4KV(1.2x50us) 使用環(huán)境條件: 0-50℃(20 to 90% RH non-condensed) 存放環(huán)境條件: 0-70℃(20 to 90% RH non-condensed) CE認證: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上傳時間: 2015-01-03
上傳用戶:幾何公差
設有一個背包可以放入的物品重量最重為s,現(xiàn)有n件物品,它們的重量分別為w[0]、 w[1]、w[2]、…、w[n-1]。問能否從這n件物品中選擇若干件放入此背包中,使得放入的重量之和正好為s。如果存在一種符合上述要求的選擇,則稱此背包問題有解(或稱其解為真);否則稱此背包問題無解(或稱其解為假)。試用遞歸方法設計求解背包問題的算法。
標簽:
上傳時間: 2016-03-15
上傳用戶:bcjtao
The Window Design Method The basic idea behind the design of linear-phase FIR filters using the window method is to choose a proper ideal frequency-selective filter [which always has a noncausal, infinite duration impulse response] and then truncate its impulse response hd[n] to obtain a linear-phase and causal FIR filter h[n]. To truncate the impulse response of the ideal filter a time window w[n] is used. Available windows in Matlab are rectangular [or boxcar in Matlab], bartlett, hamming, hanning
標簽: linear-phase The the filters
上傳時間: 2017-03-20
上傳用戶:PresidentHuang
The code performs a number (ITERS) of iterations of the Bailey s 6-step FFT algorithm (following the ideas in the CMU Task parallel suite). 1.- Generates an input signal vector (dgen) with size n=n1xn2 stored in row major order In this code the size of the input signal is NN=NxN (n=NN, n1=n2=N) 2.- Transpose (tpose) A to have it stored in column major order 3.- Perform independent FFTs on the rows (cffts) 4.- Scale each element of the resulting array by a factor of w[n]**(p*q) 5.- Transpose (tpose) to prepair it for the next step 6.- Perform independent FFTs on the rows (cffts) 7.- Transpose the resulting matrix The code requires nested Parallelism.
標簽: iterations performs Bailey number
上傳時間: 2014-01-05
上傳用戶:libenshu01
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