spectrum filtering 中文意思是什麼

spectrum filtering 解釋
光譜過濾
  • spectrum : n. （pl. -tra ）1. 【物理學】譜，光譜；波譜；能譜，質譜。2. 【無線電】射頻頻譜；無線電（信號）頻譜。3. 【心理學】（眼睛的）余像；殘像。4. 〈轉義〉范圍，幅度；（連續的）系列。
  1. The concept of irradiance signal - to - noise ratio ( snr ) on the target plane and the minimum of the irradiance that can be detected by the detector was taken as the beginning, combined with a thorough analysis of the spectrum radiating feature of the target and the sky background, the atmosphere conditions, spectral filtering and the influence that the various components in the system have on the target irradiance on the detector ' s target plane and the background irradiance snr, the equation of the flying bomb ' s effect range affected by the point of burst measuring system is made, and all related factors that have an impact on the effect range are analyzed as well

    從探測器靶面上輻照度信噪比的概念、探測器的可探測輻照度最小值出發，在詳細分析目標、天空背景的光譜輻射特性、大氣條件、光譜濾波技術以及系統各環節對探測器靶面上目標與背景輻照度信噪比的影響的基礎上，推導了炸點測量系統對爆炸的飛行彈體的作用距離方程，分析了影響作用距離的諸因素。
  2. The nonlinear filtering for nbi estimate - subtract assumes that the prediction error is dominated by spread spectrum signal and the background noise power is far below spread spectrum chip power, this assumption promises the low error ratio of chip decision but may not be attainable to digitalized dsss receiver in military communication environment, and does not coincide with the principle of dsss communication that decreases bit error ratio ( ber ) depending on spread spectrum gain, not on chip power

    在干擾估計抵消濾波中，以往的非線性濾波要求干擾抵消濾波后擴頻信號功率遠大於殘余噪聲功率，進而假設碼片判決的誤碼片率基本為零，這一要求對軍用擴頻通信是不利的，而且也不符合擴頻通信利用擴頻增益降低誤碼率的原則。
  3. The spectrum analysis showed that only the balance signals require processing by digital filter, and only inherent frequency components of balance, bracket and model system of the balance signals will require filtering, but the resonance components of test force oscillatory are. saved as more as possible

    數據的頻譜分析結果表明只須對天平測量信號做數字濾波處理；濾波原則是僅需濾掉天平、支架、模型系統的固有振動頻率分量，同時盡可能多地保留實驗強迫振動的各階諧振信號。
  4. A novel communication receiver which uses lapped transform ( lt ) incorporating modified median filter ( mmf ) algorithm is designed for narrow - band interference excision. the lt domain mmf algorithm takes full advantages of the direct sequence spread spectrum signal, as well as the characteristics of lt, performing the transform domain filtering twice. the first filtering locates the position of interference and mitigates most of them. the second filtering is performed in a small neighborhood of the located interference. so lt domain mmf algorithm can completely mitigate the interference without distorting the desired signal. simulation results demonstrate the improved ber performance and increased robustness of our receiver

    本文採用改進的重疊變換域中值濾波演算法進行變換域抗干擾處理.該演算法既考慮到直接序列擴頻信號的特點，同時又利用重疊變換的特性對變換域系數進行了二次濾波.該演算法節省處理時間，並且不需要有關干擾的先驗知識，系統性能不會隨干擾頻率變化而變化，因而是一種很穩健的處理方法
  5. Each order rainbow can be separated and reconstructed from the interference intensity distribution, using low or band pass filtering for the interference spectrum of the intensity and ifft

    提出了對干涉強度頻譜進行低通和帶通濾波、 ifft的方法，從干涉強度分佈中分離重建各階彩虹。
  6. In this paper, on the basis of observed data, spatial - temporal variation characteristics of soil temperature and soil moisture. soil temperature effects on soil water movement are studied for several kinds of typical underlying surface by using statistics, spectrum, filtering wave methods

    本文首先根據幾種典型下墊面條件下的土壤表層（ 1 - 1m ）的土壤溫濕度資料，採用統計分佈、功率譜分析、濾波等方法分析典型下墊面條件下土壤表層水熱分佈特徵及其相互作用。
  7. After filtering out the part of low frequency from the data coming from condition monitor and calculating the comprehensive magnitude of spectrum around the clap - frequency, the alarm limit of clap - frequency vibration mal - functions are determined by using statistical method

    從信號中濾除高頻成分，求得樣本拍頻附近譜線的綜合幅值，用數理統計的方法確定了拍振故障報警限。
  8. Secondly, we should consider the dispersion of the material to redesign the pif because dispersion will move the filtering curve in spectrum domain

    第二，由於色散會使濾波曲線移動，所以必須考慮材料的色散而後相應地重新設計pif 。
  9. From theoretical analysis, we know the existing demodulation methods have limitations as following : one is that the subtraction of the two signals frequencies will display as the result of demodulation when we demodulate two time - domain adding signals without modulating information ( fault information ) ; the other one is that aliasing phenomenon will occur as a result of getting absolute value, detection or square in the process of generalized demodulation analysis, such phenomenon will result in some superfluous frequency composition on the frequency spectrum, which will puzzle the detec tion of mechanical vibration. if the sampling frequency is selected from a suitable range, the aliasing phenomenon will be avoided ; the last one is that aliasing frequencies will be produced in zoom demodulation analysis because this algorithm cannot employ digital low - pass filtering to avert the folding frequencies of higher harmonics in the process of zoom sub - sampling

    現有的解調分析方法存在以下三種局限性：將不包括調制信息（故障信息）的兩時域相加信號，也以其頻率之差作為解調信號而解出；廣義檢波濾波解調分析中，由於取絕對值、檢波或平方過程可能產生混頻效應，在解調譜中表現為無法分析的頻率成分，並由此推導出避免這種混頻現象的采樣頻率的選取范圍，從根本上避免此類誤診斷的產生；幾種細化解調分析新演算法中，因為無法在細化分析的選抽時進行數字低通濾波，有可能會出現調制頻率的高次諧波成分發生頻率混疊而反折到低頻部分的現象。
  10. The data acquisition and analysis system combined with the bluetooth wireless data transmissions module, can realize different mode data acquisition on eight channels and pid control on two channels, and the data that were acquired can be processed by many kinds of processing methods just as signal pretreatment, signal trend detected, classic spectrum analysis, modern spectral estimation and self - suit signal filtering

    該數據採集分析系統和藍牙數據採集模塊相結合，可以實現8路不同模式（連續模式、點檢模式等）數據採集、 2路pid控制功能，並能對採集到的數據進行多種分析系處理（信號預處理、信號趨勢檢測、經典譜分析、現代譜分析和自適應濾波等） 。
  11. Firstly the phase is extracted from interferogram by filtering and displacing frequency spectrum. then the wavefront and the line integral density are recovered by using fft or polynomial fitting method. lastly the radial local density distribution is calculated from the fitting curve of line integral density by the abel inversion

    首先對干涉圖進行頻譜濾波，用頻譜移頻法從干涉圖中提取相位，然後用快速傅立葉變換或多項式擬合實現波面重建，計算線積分密度，再利用abel積分變換從線積分密度的擬合曲線中反演徑向體密度分佈。
  12. 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。
  13. According to the characteristic of digital adaptive heterodyne filter and the conception of interference counteraction, the paper presents a new structure to enable the filter track the interference signal precisely and control the width and depth of notch. through simulation, it is demonstrated that the new structure can suppress one or more interference signals and the filtering operation has little influence on signal spectrum

    論文利用數字自適應外差濾波器的特點，運用干擾抵消的概念，提出了一種新的結構，能使濾波器精確跟蹤干擾信號，並能控制陷波的寬度和深度，經模擬驗證，該結構的濾波器能較好的抑制一個和多個干擾，同時濾除干擾后對信號頻譜的損害較小。
  14. In analysis and transaction of signals, spectrum analyzer is a classical and important instrument which is mainly used to analyze the time domain wave, amplitude, spectrum domain wave, demodulating analysis, digital filtering, correlate analysis, transfer function and coherence function of signals

    頻譜分析儀是信號分析與處理中常用的儀器，它可對信號進行時域分析、幅值域分析、頻域分析、解調分析、數字濾波、相關分析和傳遞相干分析。
  15. Most of the lectures on nbi suppression assume that the spread spectrum signal and the background noise are white. this assumption cannot stand up in digitalized receiver because of the if oversampling and digital low pass filtering in digitalized receiver. the code - aided optimal filtering is studied extensively in the circumstance of oversampling and colored background noise

    以往的擴頻抗干擾文獻多將擴頻信號和背景熱噪聲假設為白噪聲，由於在數字正交解擴解調中採用過采樣和數字低通濾波，這一假設在數字化擴頻接收機中並不成立。
  16. ( 3 ) various digital image - processing techniques for suppression of undesired components and enhancement of quality in numerical reconstruction images are considered, such as hologram contrast - enhancement, hro subtraction, mean value subtraction, frequency domain filtering and spectrum expansion with conjugation symmetry property

    （ 3 ）從理論和實驗兩方面分析了全息圖對比度增強、平均值相減、 hro 、頻譜濾波等數字圖像處理技術，及其在消除全息圖衍射0級和孿生像，提高數值再現像信噪比方面的作用。
  17. The image registration was discussed the following three steps : initial registration, pre - filtering, sub - pixel registration. an adaptive range - filtering algorithm was proposed, which filters the different parts of object spectrum in master and slave synthetic aperture sonar images

    干涉sas復圖像的配準按實際信號處理過程分三個步驟論述：初配準、頻譜預濾波和子像素級配準，其中針對預濾波提出了一種自適應的距離向頻譜濾波方法。
  18. ( 4 ) the functions of transition digit signal from time - domain to spectrum - domain and of filtering are implemented by program, which not only reduce the cost, but also it is agility easy to maintenance and to update

    測試數據的時頻轉換，數字濾波均軟體化。用軟體程序完成硬體電路的功能，這不僅降低了硬體成本，而且使用靈活、易於維護、易於產品的更新換代。
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