noise peak 中文意思是什麼
noise peak
解釋
噪聲峰值-
The columns and rows are constrained by each other. the simulations over binary symmetric channe ( lbsc ) and gilbert - elliott channel ( gec ) shows the performance is great improved, especially over burst error channel peak signal to noise ratio ( psnr ) is improved more. it is tried to be used in wireless communication system
模擬結果表明，採用行列交替約束的約束維特比譯碼以後，性能得到較大的提升，尤其在突發錯誤通道中，傳輸的圖像經乘積編碼進行通道編碼與譯碼后峰值信噪比有明顯的提高。 -
The spectrum level of microseismic noise tends to peak at about 1/6 hz.
微震的噪聲譜在16赫趨于峰值。 -
When the input noise is the single - peak gaussian noise, the noise can improve the signal correlation only for the sub - threshold signal, i. e. subthreshold stochastic resonance ( sr ) exists
當輸入噪聲為單峰高斯噪聲時，輸入信號在閾下時噪聲才能改善信號的相關性，即隨機諧振現象存在。 -
However, when the input noise is the double - peak gaussian mixture noise, the noise can improve the signal correlation for the subthreshold signal and the suprathreshold signal, i. e., both sr and suprathreshold stochastic resonance ( ssr ) often occurs
而當輸入噪聲為雙峰高斯混合噪聲時，不僅輸入信號在閾下時隨機諧振現象有時存在，而且輸入信號在閾上時噪聲往往也能改善信號的相關性，即閾上隨機諧振現象存在。 -
Simulation results show that the ringing artifacts around the image are reduced, the main information is preserved, and the peak signal to noise ratio ( psnr ) is higher than the known methods
模擬計算表明，該方法可有效抑制圖像邊界的振鈴效應並保護了圖像的重要信息，並且比現有的方法具有更高的峰值信噪比。 -
After analyzed the basic principle of optimized noise reduction on tyre pattern, summarized three approaches to noise reduction. the first is trying to reduce size of single block or socket to reduce noise amplitude on time domain, the second is to adjust stripes sorting order and their interlace value to avoid noise - made by every single block - peak values on time domain overlayed and the last is to adjust ratio of blocks and sockets, ratio of stripe interval and stripe sorting order to avoid noise periodical distribution and abnormal high peak values in some frequency strip
論文第四章分析了輪胎花紋優化降噪的基本原理，總結出三條降噪途徑：在允許范圍內盡量減小單個塊或槽的大小、刻刀槽軟化花紋塊來減小噪聲時域波幅度；調整節距排列順序、花紋條之間的錯位值，使各發聲單元發出的聲壓時域波形的同向峰值錯開，避免同向峰值疊加；調整花紋塊和槽比例、節距比例、節距排列順序，盡量避免周期性分佈，使輪胎所發出的噪聲趨于白噪化，避免某些頻段的異常高峰值。 -
By using peak - band algorithm, the aim area ( b area ) is segmented from the wear area image. aiming at the edge noise of image, mathematical morphology theory is applied to integrate edge. test results show that the segmentation algorithm is effective in identifying tool wear degree
針對邊界中存在的分割噪聲使用圓形形態運算元對邊界進行完整化，最終獲得了完整的刀具磨損區圖像，為實現通過刀具磨損區大小來評判刀具磨損程度的方法奠定基礎。 -
At the beginning of this thesis, the principle of fiber fabry - perot strain sensor is presented briefly, and the influence on the results of the peak - to - peak algorithm, brought by the spectrum distribution of light source, wavelength quantification or the noise in the output of the fabry - perot sensor is investigated. the limitation of the peak - to - peak algorithm is pointed out
論文首先闡述了光纖法珀應變傳感器的測量原理，分析了實際光源光譜的非均勻分佈、波長量化和傳感器輸出信號中的噪聲等對波長域的條紋峰值解調演算法的應變測量結果的影響，深入分析了條紋峰值解調演算法的局限性。 -
With resistant function to peak waves and noise by high reliable electronics. rated residual current from 15ma to 500ma. the overload, short - circuit and earth leakage protection function by dual - voltage, high speed and compact size
過電流保護特性採用有效值控制方式，可防止因高諧波而誤動作，增加其可靠性，此為一般傳統電子式塑殼斷路器所無法達到的功能。 -
Frequency - domain equalization. at the same time discusses some key problems in ofdm : high ratio of peak - to - average power of output signals, problem of synchronization, channel estimation, adaptive bit, power and subcarrier allocation. emphasize on channel estimation, and present a new algorithm which can filtering more interpolation errors and noise. for the sake of improve the performance of resist narrowband noise and make efficient use of the spectrum apply malvar wavelet division
同時就ofdm系統中的一些關鍵問題如峰值平均功率比（ papr ）太高，同步問題，通道估計，通道、比特與功率必須動態分配進行了研究，著重研究了通道估計問題並提出一種改進的方法，能濾除更多的噪聲分量和插值誤差，提高系統的性能；為了提高抗窄帶噪聲的性能和提高通道利用率，用malvar小波變換實現了不等帶寬分配。 -
Secondly, the dissertation proposes a novel blind symbol - timing scheme for ofdm systems based on cyclostationarity feature of received symbols. the proposed schemes also exploits the periodicity of ofdm symbol introduced by cyclic prefix, by applying 2 - dimentional fourier transformation and choosing the appropriate correlation peak value as the symbol start location, the precision of this scheme is higher than previous conventional method. thirdly, the dissertation presents analysis with regard to channel estimation of ofdm systems. several interpolation algorithm in ofdm systems which based on pilot sequence have been analyzed in the first instance, and the influence of the channel noise on interpolation precision has discussed. the theoretic analysis and simulation results show that : the interpolation error induced by the precision of interpolation procedure itself has out weight
第三，論文在ofdm系統的通道估計方面，先對基於導頻的ofdm通道估計中的多種插值方法進行了分析，討論了噪聲對插值精度的影響，指出插值本身的精度所造成的插值誤差遠大於噪聲所帶來的插值誤差，從而階次更高的插值演算法在實用中並非最優的;並指出插值濾波法比變采樣率演算法對噪聲的影響更為敏感，在信噪比較高時插值濾波演算法比變采樣率演算法更優。 -
The reason that the noise is lower with inclining tongue is : 1 ) both the radius of the tongue and the gap between the tongue and the blade are changed across the wideth ; 2 ) the phase angle between blade and the tongue is changed across the wideth, therefore the peak value of the noise do not appear at the same time, so the peak value of the noise with inclining tongue is much lower than the straight one. the influence of the expanded angle of the shell of the fan on the noise was invested experimentally, and the optimal angle was got
傾斜蝸舌降噪的主要原因是：一是改變了從氣流入口側到風機輪盤的蝸舌間隙和蝸舌半徑；二是改變了葉輪與蝸舌非定常相互作用的相位差，使其產生噪聲也有相位差，迭加的結果進一步降低了噪聲。另外，試驗研究了不同蝸殼擴張角對風機噪聲及效率的影響規律，蝸殼擴張角選擇當否，對效率和噪聲影響較大。 -
The spectrum level of microseismic noise tends to peak at about 16 hz
微震的噪聲譜在1 6赫趨于峰值。 -
The spectrum level of microseismic noise tends to peak at about 1 / 6 hz
微震的噪聲譜在1 6赫趨于峰值。 -
Based on fourth - order cumulant, a computationally efficient method for joint estimating both directions of arrival and ranges of near field sources with known carrier frequency is firstly presented. the proposed algorithm need not any spectral peak searching and the 2 - d parameters are automatically paired. lt is suitable for arbitrary additive gaussian noise environment. in the following section, a 3 - d esprit method for jointly estimating of frequencies, doa ' s and ranges of multiple near - field sources with unknown carrier frequencies is proposed. the parameters estimation are given by the eigenvalues of different matrices. furthermore, its performances are confirmed by several computer simulations
利用四階累積量，第五章首先給出了一種載頻已知的情況下基於近場源的距離和波達方向聯合估計演算法，通過構造的陣列輸出信號四階累量矩陣使空間信號到達方向和距離估計無需譜峰搜索，且參數自動配對，適合於任意高斯噪聲環境。進一步在第三節提出了一種載頻未知的情況下的多個近場窄帶信號源doa 、距離和頻率聯合估計的3 - desprit演算法。 -
Then, this paper presents a fast time - delay estimation algorithm ficp ( fine interpolation of correlation peak ). this algorithm can effectively reduce the impact of signal non - stationary and improve the accuracy of tde ( time - delay estimation ) without increasing calculating complexity. what ' s more, it can reduce the interference caused by wide band noise
為降低信號非平穩性的影響，提高時延估計的精度，文中提出了一種快速相關峰細化時延估計演算法ficp （ pineinterpolationofcorrelationpeak ） ，此演算法精度高，速度快，另外還可以抑制寬帶噪聲的影響。 -
Peak signal to noise ratio, psnr
通過比較降噪前後的峰值信噪比 -
Experiments are performed on monochrome and color image sequences, and performance is measured by the peak signal to noise ratio ( psnr )
最後分別對單色和彩色圖像序列進行了實驗，利用峰值信噪比（ psnr ）來度量演算法的性能。 -
Experiment results show that in low bit rate environment, the new image compression scheme performs better than jpeg in the aspects of perception and psnr ( peak signal noise ratio )
實驗結果表明該演算法在低碼率下，相比jpeg ，獲得了在視覺效果和峰值信噪比方面更好的恢復圖像質量。 -
Last, based on the mc - cdma system model above mentioned, the matlab simulation is done. by the simulation of the ber performances from white gaussian noise, peak power clipping and combating multipath interference are analyzed, and some conclusions are obtained that mc - cdma is superior to ofdm
最後，在上述給出的mc - cdma模型中，通過matlab模擬分析了在mc - cdma與ofdm兩種系統中由高斯白噪聲、削波噪聲以及多徑干擾所造成的誤碼率分佈曲線，得出mc - cdma系統在無線數據傳輸方面較ofdm系統更具有優良的特性，並給出了比較具體的性能分析。
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