low-frequency filter 中文意思是什麼
low-frequency filter
解釋
低頻濾波器-
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 mask acts as a low frequency spatial filter whose effect is to enhance rendition of fine detail.
掩模就象一個低頻空間濾波器，其效果是增強細節的重現。 -
Secondly, according to the character of this kind of harmonic, the solutions of power filter are deeply analyzed and an optimized topology for series connected hybrid power filter is obtained. by pwm technique, midfrequency transformer and the principle of the magnetomotive force ( mmf ) compensation, the problem to the transfer of the low - frequency harmonic power compensatory signal in the series apf is solved, in technique
其次，針對acem系統特有的「電源諧波」特性，深入分析了濾波器方案，得到了一種適用於acem系統諧波抑制的串聯混合型有源電力濾波器優化拓撲結構，並採用了pwm調制技術、中頻注入變壓器和磁勢補償原理有效地解決了串聯apf中低頻諧波功率補償信號傳輸的難題。 -
Since the target glint is essentially a very low frequency phenomenon whose bandwidth is typically equal to or less than that of the system, it is difficult for a missile to filter it out, or will cause the miss to increase
由於目標閃爍的頻率通常小於或者與系統的頻帶相當，所以導彈無法濾掉此干擾信息，致使系統脫靶量增大。 -
In hardware, we choose anti - disturbance photoelectric isolative sensor, take rc filter to resolve high - frequency for anti - disturbance. in software, we adopt arithmetic of recursion mean value to collective signal values to resolve low - frequency ac and pinnacle pulse disturbance
在硬體方面，選用抗干擾能力強的光電隔離電量傳感器，並採取rc濾波抗干擾措施解決中高頻干擾問題；在軟體方面，對採集到的信號量採取遞推平均值演算法，解決低頻交流和尖峰脈沖干擾問題。 -
On the basis of practically achieved low - frequency laser - vibration measuring - system, this thesis analyses the principle of laser - vibration measuring - system, the optical factors which have effect on contrast degree of interference fringe, the optical - electric transformation factors which have effect on measuring accuracy, the important of filter for improving the accuracy in the absolute calibration and the outward vibration which has effect on system accuracy, etc. in chapter one, the background of laser measuring vibration, and then followed by its current status, is introduced and analyzed
本論文根據實際研製的激光測振儀系統，從提高激光測振儀精度的角度出發介紹了激光測振儀的原理，並詳細地剖析了光路對測振儀干涉條紋對比度的影響、光電轉換對測量精度的影響、光電信號的濾波放大以及外界振動對測振儀系統的影響等技術問題。 -
This dissertation focuses on the application of data fusion in two - phase flow regime identification. following is the main contribution of the dissertation. 1 ) based on quartile and first order differential, a new outlier detection algorithm is presented, experiments show that the method combining with low pass filter can remove gross error and unwanted frequency components
本文的主要工作與創新點在於： 1 ）將分位數方法與一階差分法相結合，提出了一種基於一階差分的粗差剔除方法，該方法與低通濾波器的結合可以有效去除兩相流壓力波動信號中的粗大誤差以及信號頻帶以外的頻率成分。 -
Analog synthesis often use low - pass filter to remove electronic audio generator generated by high - frequency noise
模擬合成器常常使用低通濾波器來去除電子音頻發生器所產生的高頻噪聲。 -
Then a low pass filter is designed to filter high - frequency noise in data. and smooth data again by means of central interpolation algorithm ; helicopter model with multi input single output are identified respectively in ls method and ml method
（ 2 ）剔除並補正了飛行實驗數據中的野值；設計了一個低通濾波器來濾除數據中的高頻噪聲；用中心插值演算法對數據二次平滑。 -
If the input signal is super imposed with high - frequency noise, use a low - passed filter
若輸入信號伴隨高頻干擾，應在線里用高頻過濾器。 -
If input sigmal is supwrimpsed with high - frequency noise, use a low - pass filter in the input signal line
若輸入信號伴隨高頻干擾，應在線里用高頻過濾器。 -
Then the pulse is modulated by pwm. after the modulated signal through a low pass filter, we can get the change of the frequency that related to the capacitor
對頻率變化的脈沖進行寬度調制，通過低通濾波就可以輸出頻率變化量，也就可以得到相應的加速度值。 -
From simulation we can see that the lower of the digital low pass filter ' s cut off frequency, the smaller of the instruction current ' s aberration. experience from foreign country show that active power filter has good application foreground. so its research and application is very important in the future
本文還重點討論了數字低通濾波器的設計及其截至頻率對指令電流精度的影響，通過模擬得出結論：數字低通濾波器的截止頻率越低，基波有功電流的畸變就越小，從而基波有功電流減去負載電流求得的指令電流的誤差也越小。 -
This research about the uhf frequency synthesizer mostly includes the following parts : 1 ) the dds modules include the dds ad9852 part, the lc band pass filter design part, the amplifier design part and lc low pass filter part. 2 ) the pll modules include the design of the loop filter which is the core of pll, lc band pass filter design and the amplifier design. 3 ) the controller modules of the system include the part of pc rs - 232 com port communication with the mcu and the part of the process of controller about urat and mcu
本課題的研究主要包括以下幾個方面的內容: 1 ） dds模塊設計:包括ad9852部分、 lc帶通濾波器設計部分、放大器設計部分; 2 ） pll模塊設計:包括pll關鍵部件環路濾波器設計、 rflc帶通濾波器設計、末級放大器設計部分; 3 ）控制模塊設計:包括計算機與單片機串口通信的電路設計部分以及程序設計部分。 -
In order of the process of data processing arrives national standard, the article described the technology of data sign processing. compared and analyzed different methods of filter designing, chosen the method of fir with window and designed the low frequency data filter. used the software of matlab to simulate the frequency performance, which is combined with some experiments
為了使試驗數據處理過程符合國家法規要求，本文對數字信號處理技術進行了探討，對不同的數字濾波器設計方法進行了對比分析，擇優採用fir加窗技術開發出了滿足要求的低通數字濾波器，並結合試驗情況用matlab對本濾波器幅頻特性進行了模擬計算分析。 -
After compared lots of literatures and methods, we offer the norm for selecting different filters. that is to say, in arrhythmia analysis, the integer coefficient lowpass filter is adopted, while in heart rate variability analysis, the high pass filter designed by all - pass minus low - pass filter or filter which can remove both baseline wander and 50hz power - line frequency at one time is used
在對大量文獻進行比較、研究的基礎上，針對不同的臨床應用目的，提出了各種濾波器的選用準則：在心律失常分析中選用整系數低通數字濾波器對原始心電信號進行濾波；在對心率變異信號進行分析時需先用低通濾波器濾波然後再採用全通減低通方法設計的高通濾波器或者一次性濾波器進行濾波。 -
The thesis describes a prototype fractional frequency synthesizer which is supported by a project granted by the ministry of science and technology of pr china. firstly, based on the principle of pll, this paper briefly describes three basic pll components : phase detector ( pd ), low pass filter ( lpf ), voltage controlled oscillators ( vco ), analyzes the linearized pll and summaries the transfer functions of third - order pll with ideal intergrator filter respectively. based on a microwave vco, the single point frequency pll frequency ranging from 2. 2 to 2. 5ghz is developed
首先，從鎖相環的基本理論、原理出發，分析了鎖相環中的三個基本部件：鑒相器、環路濾波器和壓控振蕩器，此後，針對線性化鎖相環進行了分析，研究了在使用比例積分濾波器時，三階鎖相環的環路參數計算；在電路實現時選用了lmx2353 ，在此基礎上，完成了2 . 2 ~ 2 . 5ghz范圍內的小數頻率合成器設計。 -
Compared with quasi - resonant, it can reduced transistor voltage stress and improved load range and stability in low frequency range. because of the structure of three - level, transistor voltage stress and filter can be reduced significantly
與傳統的準諧振變換器相比，該變換器功率器件的電壓應力大大降低，在很窄的開關頻率變化范圍內實現寬負載范圍的軟開關。 -
In the fourth chapter, a fourth - order chebyshev low - pass filter employs new low voltage, highly linear, wide inputting range transconductor is proposed, then we presents a new circuit to tune gm value of transconductor accurately, which employs a new switched - capacitor circuit to change the bias current of transconductor, a third order elliptical function low - pass filter with accurate tunable frequency has been designed using transconductor that is not only with voltage common - mode negative feedback, but also with varying bias - triode transistors which can improve the linearity of this circuit
第四章：提出了一種新的低電壓、高線性度、寬輸入范圍跨導，並由此設計實現了四階切比雪夫（ chebyshev ）低通濾波器，接著提出了一種寬輸入范圍且具有電壓共模負反饋的全差分跨導，並採用一種新的開關電容電路實現跨導值gm精確可調，從而可以設計得到高性能具有精確截止頻率的跨導-電容三階橢圓函數濾波器。 -
The mechanism for the fault of the working state of anode is studied in this paper. the spectrum of the sampled signals is got using the technique of amplitude - frequency analysis, then the corresponding iir butterworth digital filter is designed to separate the low - frequency part and the high - frequency part using digital filter design technique
利用頻譜分析技術對采樣信號進行頻譜分析，並採用數字濾波器設計技術設計了相應的r型butterworth數字濾波器，將信號中的低頻信號和高頻組分進行分離，從中提取出與陽極工作故障有關的特徵量。
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