periodic filter 中文意思是什麼
periodic filter
解釋
周期頻率特性濾波器-
The results of experiment shows : l / d10, rate of filtration, filtration - supporting agents have bigger influence to filterability. the optimal combination of certain parameter of l / d10, rate of filtration, filtration - supporting agents can improve filterability obviously, get better quality of water outlet, extend the filter cycle, improve periodic quantity of water produce
試驗結果表明： l d _ （ 10 ） 、助濾劑、濾速這3個因素對過濾性能有較大的影響；一定參數的l d _ （ 10 ） 、助濾劑、濾速的優化組合能明顯改善過濾性能，取得較好的出水水質，延長過濾周期，提高周期產水量。 -
1 in the research of design of radar waveform, one kind of hybrid radar waveform obtained by combining the chirp waveform with the non - periodic pseudorandom sequences is discussed. through the theoretical analysis and computer simulation, several main characteristics of this kinds of hybrid waveforms are discussed, such as the ambiguity function, ambiguity graph, the spectrum, the weighting methods, the response of the processing filter and the low probability of interception. those are showing the effectiveness of the new hybrid waveforms on the performance of high resolution and low probability of interception
作者在以下幾個方面的研究工作中取得了進展及創新： 1 、在雷達波形設計中，介紹了一類新的線性調頻信號與非周期隨機編碼信號相結合的組合波形的組合形式，通過理論分析和大量的計算機模擬研究了這類組合波形的模糊函數（圖） 、頻譜特性、多普勒頻移特性、加權輸出特性、低截獲等方面的特點，證明了新型的組合波形在高分辨、低截獲等方面的有效性。 -
In if the parameters of the friction model are unknown or unprecised, and the motor torque wave is periodic, the repeat - study control technique is used. we discuss the stable condition when introducing the technique into the system, and have a low - pass filter to ease the stable condition
針對摩擦模型參數未知或不精確的情況以及周期性的電機力矩波動，提出了重復與迭代學習控制方法，討論了採用重復控制后系統的穩定性問題，並得到了相應的穩定條件。 -
For ac discrete digital signal, the zero - calculating method is applied to calculate the true zero in the periodic signal. for the measurement of ac and dc voltage spectrum, the faster fourier transform ( fft ) is used. to measure dc voltage ripple spectrum and frequency modulation of ac voltage, the digital filter is used
其中對于交變的離散數字量，採用零點撿出技術計算周波信號的真實過零點；對于交直流電壓頻譜，採用快速傅立葉變換進行頻譜分析；對于直流電壓脈動和頻率調制，採用數字濾波器進行濾波后再做分析處理。 -
The periodic function is separated into the digital quantity. it has the high stability signal sweep frequency using the phase - lock link to carry on to the digital quantity reading, through d / a transformation, the appropriate filter may obtain the high stability signal output
摘要將周期函數離散成為分離的數字量，利用鎖相環產生高穩定度的信號掃描頻率對數字量進行讀取，經過d / a變換及恰當的濾波可以獲得高穩定度的信號輸出。 -
The process of noise elimination based on wavelet is to eliminate disturbed noise of enterprise signals which produced when it bored, conveyed and processed. the elimination noise process is to use the valve filter method to filter the high frequency coefficient, and reconstruct the low frequency and high frequency which noise have been eliminated, the signal after noise eliminated is more glossy and it is helpful to do the trend forecast it can analyze and do trend forecast to the total trend, periodic and sudden change of signals when do the trend forecast to the enterprise signals
基於小波方法對企業數據信號展開的消噪過程，主要是對經濟數據在生成、傳遞和加工過程中產生的干擾噪聲進行消除，消噪的方法主要是採用高頻系數的閥值過濾法，通過對低頻和過濾后的高頻的重構可以還原出消噪后的信號，該信號的光滑性更好從而有益於對企業數據信號進行進一步的趨勢預測。 -
Sometimes it is difficult to predict and calculate the periodic orbit, so the chaotic control technology based on washout filter is used to control chaotic phenomena of dc / dc converter
針對上述不足，本文採用了washout濾波器來控制dc / dc變換器中的混沌現象，模擬結果證明了該方法的有效性。 -
A frequency selective surface ( fss ) is a metallic periodic structure with frequency selective properties. depending upon design, it may be low - pass, high - pass, band - pass, band - stop filter
頻率選擇表面（ fss ）是具有選擇頻率功能的一塊金屬周期結構，它可以被設計成低通、高通、帶通、帶阻濾波器。
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