In all kinds of complicated network, oriented linking and unlinking, communication frequency resource is strained, and bandwith to transmitting audio frequency signal is too restricted, complicated and fluky, while audio frequency data exponential have been increased in the last several years. under the circumstances, based on the research of predecessor, this paper studies wavelet analysis ' s maths gist and practices significance on signal process, and puts forward a optimized wavelet package condensation arithmetic to process audio frequency data, which gives attention to coding efficiency, multirate and compression delay. simulation experiment on the arithmetic has been done by matlab
針對無連接和面向連接的各種復雜網路環境下,通信頻帶資源緊張,音頻傳輸帶寬有限且復雜多變,而各種音頻數據又日益增多的局面,本文研究小
波分析在信號處理方面的數學依據和在數據壓縮方面的實際意義,在前人不斷工作的基礎上,提出了一種優化小
波包變換編碼方案用於音頻數據的壓縮演算法,兼考慮了編碼效率、多碼率和壓縮時
延多個方面,並在matlab環境下做了模擬實驗,對各種音頻信號及多種小
波函數做了模擬結果比較,實驗結果證明該演算法可以在一定計算復雜度下可以很好地改進壓縮效果,達到多碼率下實現實時編解碼的過程,在高速dsp晶元等硬體設備支持下,可以有效應用於實際復雜多變信源編碼。
3. damp : it can extend the using life of the pressure gauger because the special structure of the tube can reduce the puncture from violent valve of the measured pressure
3減震:由於接管內的特殊結構,可以減弱減緩被測壓力劇烈
波動對壓力表的沖擊,從而
延長壓力表的使用壽命。
With the correlation technique, direction and speed of the infrasound can be calculated by computing the time delay of each detector and by using geometric knowledge
利用互相關技術,計算信號在不同傳感器上的時間
延遲,再由平面幾何原理,得到
波的方位和
波速。
In fact, the deep overlapping of the wavepacket of particles implies new interactions which are technically called nonlinear ( in the sense of depending on powers of the wavefunctions bigger than one ), nonlocal ( in the sense that they are extended over the volume of wave - overlappings which cannot be evidently reduced to finite number of isolated points ), as well as nonpotential ( in the sense of being of contact / zero { range type for which the notion of action - at - a - distance potential has no mathematical or physical meaning of any type }
事實上,粒子相互之間深深重疊的
波包意味著新型的相互作用,技術上它可稱之為非線性意義為它們取決于
波函數大於1次的幕而定,為非局部意義為它們的
延伸超越了
波重疊的體積,使其顯然無法再縮小到有限數孤立點,以及為非潛能意義為相互接觸零距離,在這種情況下一定距離下作用的潛勢不再有任何數學上或物理上的意義。
The optimal gain filter of ld - celp
低
延遲碼激勵語音編碼演算法的最佳增益濾
波器
Delay line oscillator is composed of broadband amprifer adjustable attenuator and saw sensor device. after output signal of delay line oscillator is smoothed, it mixes with 109mhz local oscillation signal. its differential frequency signal is smoothed by low - pass filter trimmed by shaping circuit and processed by digital processing circuit
延遲線振蕩器由寬帶放大器、可調衰減器和聲表面
波質量傳感器件構成。
延遲線振蕩器輸出信號經濾
波后與109mhz的本機晶體振蕩器輸出信號相混頻,通過低通濾
波取其差頻,並經整形後由數字信號處理電路處理。
The city of oporto, built along the hillsides overlooking the mouth of the douro river, is an outstanding urban landscape with a 1, 000 - year history
波爾圖市
延山勢而建,可以眺望到杜羅河入海口,此地舉世無雙的城市景觀已有千年歷史。
7. in chapter 8, a new method for estimating the doppler and multipath time delay of the overlapping echoes for lfm pulse radar by only one period pulse signal is presented
7 .在第八章提出了一種對lfm脈沖雷達回
波d叩pler頻移和多徑時
延進行聯合估計的方法。
The results show that the influences of duration and amplitude of stress wave on spallation process of rock under stress wave loading are important ; and stress wave with different waveforms is characteristic of different stress values and different stress loading ratios during the same period of time, which brings about the comprehensive effect when difform stress wave is loaded to medium
通過對不同應力
波延續時間、不同應力
波峰值和不同應力
波波形下應力
波誘發層裂過程的數值分析,對應力
波反射誘發層裂的規律和機制進行探討。
The microwave delaylines using hts thin films have the advantages of small size and mass and low insertion lose. these characters are much better than the delaylines using surface acoustic wave, coaxial - line, magetostatic wave or conventional metal planar structures. these merits benefit a lot in largely reduction the mass and volume of communication systems
利用高溫超導( htsc )薄膜材料研製的微
波延遲線具有體積小、重量輕、插損小等優點,這是利用聲表面
波、同軸線、靜磁
波或常規金屬平面結構設計的
延遲線所無法比擬的。這些優點對于減輕通信系統的重量和縮小體積都是非常有利的。
This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga. this scheme adopts quadrature balanceable modulation, intermediate frequency sampling, digital matched filtering, delay differential demodulation techniques and so on. it directly processes the digital signals on intermediate frequency without down - conversion, and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits
本文採用了一種基於fpga的通用數字調制解調方案,該方案在調制端採用了正交平衡調制技術,在解調端採用了中頻帶通采樣、數字匹配濾
波、
延時差分解調等技術,直接在中頻上進行數字信號處理,不需要進行下變頻,也不需要增加額外的偽隨機碼同步捕獲和載
波提取電路。
The main content of this paper is about sensors " type - selection in testing system, the sensors " fault - detection and fault - tolerance, and the correlative signal processing algorithms, providing the control system with accurate and reliable uncompensated signal and filtering - delay - compensation signal
本文的主要內容是研究檢測系統中傳感器的選型、故障檢測與容錯及相關的信號處理演算法,為控制系統提供準確可靠的未平衡離心加速度信號和濾
波延時補償信號。
The principles of filtering, wavelet - denoise and integral algorithms to pick up the tilting pulse ( filtering - delay - compensation signal ) are discussed. especially, a " high - in & low - out " method is presented to determine the thresholds in the three algorithms ; it is very robust and adaptable. in the end, the performance of the three algorithms is compared to each other based on the process of total data of one test - on - line
分別設計了濾
波法、小
波去噪法和積分法來提取傾擺脈沖(濾
波延時補償信號) ,論述了這三種演算法提取傾擺脈沖的原理,提出了一種魯棒性好、適應性強的「高進低出」法來確定三種提取傾擺脈沖演算法中的門限值:最後用這三種演算法對一次線路試驗的全部數據進行了處理,並比較了各種演算法的特點。
Half - wave retarder
半波延遲器