analysis method of frequency domain 中文意思是什麼

analysis method of frequency domain 解釋
頻率分析法
  • analysis : n. （pl. -ses ）1. 分解，分析；【數學】解析。2. 梗概，要略。3. 〈美國〉用精神分析法治療（＝ psychoanalysis）。
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  • of : OF ＝Old French 古法語。
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • domain : n 1 領土，版圖；領地。2 管區，勢力圈；（特定動物等的）生長圈；（學問、活動等的）領域，范圍；【物...
  1. The classical frequency - domain theory forms a basis of bridge vibration analysis, however such method has some limitations. some literatures show that the time - domain analysis method has advantages for vibration analysis. because of the research on time - domain vibration analysis developed only in recent years and the theory is n ' t perfect enough, it needs to be made further investigation

    經典的簡化靜力法存在一定的局限性；反應譜法為中、小跨橋梁的抗震設計提供了廣泛的應用，但對解決大跨度橋梁的線性與非線性問題存在明顯不足；時程分析法由於該領域的研究起步較晚，目前的理論和方法還不甚成熟，有待于進一步深入研究。
  2. Furthermore, the isoline maps of mean wind pressure coefficients and rms wind pressure coefficients of the structure under various wind directions are plotted. in the matter of theoretical analysis, modeling with finite element method, using the local mean wind pressure coefficients and time history of fluctuating pressures determined in wind tunnel, the wind - induced dynamic responses for long - span grid roof structures are calculated in frequency domain and time domain separately

    在理論分析方面，建立合理的有限元模型，利用剛性模型風洞試驗獲得的各種不同情況下屋面各節點的平均風壓系數和脈動風壓時程，在頻域內和時域內進行了大跨網架屋蓋結構的風振響應分析。
  3. Wavelet transform is a kind of time - frequency analysis method in signal processing and is becoming more and more popular during these years. its multi - scale property, localization both in time and frequency domain, sensitivity to the abrupt change of signals, and good to denoising make it an ideal way for edge detection

    近幾年來迅速發展起來的小波分析，由於其具有時頻局部變換的特性及多尺度性，能敏感地反映突變信號及良好的去噪效果，因此能準確、有效地確定圖象邊緣位置，因此是一種理想的邊緣檢測方法。
  4. Wavelet analysis is used to translate noise signal of the engine into time - frequency domain. selecting appropriate frequency band to pick up and making its envelope spectrum, then two feature frequency - 0. 5x speed frequency and 2x speed frequency that represent the abrasion condition can be found. in addition, a new diagnosis method of image processing technique is proposed

    利用小波分析將測得的機體噪聲信號變換到時頻域，選擇合適的頻帶加以提取並進行包絡譜分析提取包含特徵頻率的包絡，通過分析提取后的0 . 5倍頻和2倍頻分量，發現兩個特徵頻率可準確反映主軸承的磨損狀況。
  5. Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing, pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction. ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain. ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain

    通過大量的理論分析和模擬實驗，得到了一批具有一定價值的結論：從信號處理的角度出發，對于脈沖式干擾，能夠運用時域滑動窗口積累的方法去掉，並且通過預測插值得到較好的恢復；對于高斯白噪聲干擾，在時頻變換域內應用時頻分析方法可減小其對分散點目標的干擾；對于射頻噪聲，通過平均距離頻頻法和頻域陷波的方法可以去掉；從改變合成孔徑雷達系統角度出發，類似雙基地雷達能夠避免各種干擾，對發射信號進行調幅，調相以及改變調頻斜率都是較好的抗干擾方法。
  6. The rules obtained from the background modal analysis method based on the quasi - steady assumption in frequency - domain are similar to those obtained by the analysis method in time - domain, and the influence of high modes can be considered. finally, the dissertation suggests that for engineering design, it is better to use equivalent wind load factor defined the ratio of wind - induced total displacement to static displacement for computing the equivalent static wind load of long - span grid roof structures, and the equivalent wind load factor of the roof of taizhou stadium is calculated

    最後通過對大跨網架屋蓋結構的風振系數的研究，提出了在實際工程設計中，採用位移風振系數來計算大跨屋蓋的等效靜力風荷載既正確又方便使用，並且給出了臺州體育中心看臺屋蓋進行分塊統計后的位移風振系數，以供設計參考。
  7. From the angles of the energy spectrum and distribution of feature frequency, ways of analysis on the tendency of signal in frequency domain are presented, and a method of solving frequency mixing is discussed

    從能量譜和特徵頻率分佈的角度，研究了監測信號的變化趨勢在頻域的表徵，並提出了一種解決小波包混頻現象的方法。
  8. In frequency - domain, the background mode that has the most contribution to the buffeting energy of the structure is calculated using the background modal analysis method, thus the rms of the dynamic responses of long - span grid roofs is obtained. on the other hand, the rms of the dynamic responses is also obtained by direct integral method in time - domain. after the comparison of the results of two methods, several important conclusions can be made

    在頻域內，採用背景模態分析法，通過計算得到對結構振動能量貢獻最大的一階背景模態，從而得到結構脈動響應的均方根值；在時域內，採用直接積分法求出結構響應的時間歷程，並且通過統計，同樣得到結構脈動響應的均方根值。
  9. This thesis mainly studies to a few methods about the fault diagnosis of the rolling bearing, among them there are traditional and classic signal analysis method - the hour area analytical method and the frequency domain analytical method. mainly introduced the signal of the modern analysis method - time sequence analysis method

    本論文主要研究了滾動軸承故障診斷的幾種方法，其中有傳統的也是經典的信號分析方法? ?時域分析法和頻域分析法;主要介紹了現代的信號分析法? ?時間序列分析法。
  10. The analysis methods that the system adopts are introduced from the view of time - domain, frequency - domain and time - frequency - domain. emphasis is focused on the correlation integral analysis method. the measurement parameter of signal nonstationarity defined on the basis of correlation integral is discussed, and the feasibility that it is used to diagnose the faults of dynamic nonstationarity as the characteristic parameter is also investigated with a case

    本文將系統中所實現的常規分析方法從時域分析、頻域分析和時頻域分析三個角度分類進行了說明，重點介紹了相關積分分析方法，探討了基於相關積分定義信號非平穩性的度量參數，並結合實例探討了該參數作為特徵參數診斷動態過程非平穩類故障的可行性。
  11. The paper proposed a method that combining the lamb wave with time - frequency domain analysis technology for the damage detection of composite materials

    本文將lamb波與hht技術結合起來，用於復合材料結構的損傷識別。
  12. The classical signal analysis method is fourier transformation, whose essence is to decompose the signal wave into many sine waves, and which also can be seen as representation of time function in frequency domain

    傅里葉（ fourier ）變換是經典的信號分析方法，其實質是：把波形分解成許多不同頻率的正弦波之和，可看作是時間函數在頻率域上的表示。
  13. Based on guyed mast fem model of 4 - node space cable element and space beam element, the method to analyze along - wind induced nonlinear oscillation in the time domain is established, which breaks the traditional analysis in the frequency domain using stochastic theory on the linearization premise. and the results of imitation analysis reflect the essential character of guyed mast

    在將桅桿結構離散為空間四節點索單元和空間梁單元的計算模型的基礎上，提出了桅桿結構順風向風振響應的非線性時域分析方法，突破了傳統的用隨機振動理論對桅桿結構進行頻域分析的方法，模擬分析結果表明能夠反映桅桿結構的基本特徵。
  14. Due to the unsteadiness of the vibration signal, conventional methods of gear fault diagnosis based on steady signal processing, which consist of time domain and frequency domain analysis method, are not as effective to local defect as to dispersed defect of gear

    傳統的齒輪故障診斷方法（包括頻域分析方法和時域分析方法）對于齒輪的分佈故障有很好的診斷效果。但當齒輪產生局部故障時，失效的輪齒間斷地進入嚙合，產生沖擊振動，使得齒輪振動信號包含了非平穩或時變成分。
  15. So a new method is proposed that combines the traditional transfer function and coherence function analysis with the statistics of frequencies to obtain the dominant frequencies, which can reflect how the noise sources influence the bus interior noise level in frequency domain, and which will provide reliable references to make up plans in reducing the bus interior noise

    對此提出了在傳統的傳遞函數和相干函數分析的基礎上結合頻率統計，選出優勢頻率的方法來考察噪聲源對車內噪聲的影響，為制定客車車內噪聲治理方案提供了可靠的依據。
  16. The used value of doppler centroid influence the imaging result very much, so it must be estimated precisely. the estimating methods contain time domain method and frequency domain method. time - frequency analysis method can be used to improve estimating precision

    多普勒中心頻率的取值對成像效果有很大影響，必須精確估計，估計方法有時域方法及頻域方法，還可利用時頻分析方法提高估計精度是。
  17. A time - frequency analysis method is presented to solve paper machine press section bearing vibration signals of unstable and complication, applying wavelet function to the unstable signals for faulty bearing according to paper machine press section roll bearing characteristic, and process the vibration signals by means of decomposition and reconstruction, obtaining the vibration signals in different frequency bands, the statistic in frequency domain of relevant frequency bands is served as monitoring feature

    摘要針對紙機壓榨部滾動軸承尺寸大響應弱、運轉速度低、低頻信號容易淹沒、調制源多、振動信號非平穩性等特點而導致常規的傅立葉分析診斷故障效果不佳的情況，提出了一種應用小波變換的時頻分析方法，對振動信號進行分解和重構處理，獲得了振動信號在不同的頻段的分量，提取相應特徵頻段重構分量的功率譜的頻域統計值作為特徵參數，從而實現對軸承故障診斷。
  18. The next in order, introduced the hour area analysis, some in common use methods within the frequency domain analytical method etc, and the method of pick - up the characteristics of the time sequence analysis

    其次，介紹了時域分析、頻域分析中的一些常用的方法和時間序列分析等多種滾動軸承故障特徵提取方法。
  19. The error reasons of low resistance measurement are studied, the theory of removing line resistance error proves to be right with time - domain analysis method and frequency - domain analysis method, and the results proved to be true by the experiment datum with the statistics method

    研究了低電阻檢測時產生系統誤差的原因，分別用時域和復頻域兩種方法分析了在低電阻檢測時消除附加電阻誤差的原理；並通過兩組實驗數據用數理統計的方法驗證了附加電阻誤差影響已經被消除的結論。
  20. In this paper, fsk signal of power remote is analyzed in time - domain and frequency - domain. based on the analysis, a new method to detect carrier frequency of fsk signal named time - domain joint and modern power spectrum estimation is put forward

    對電力遠動通道fsk信號進行了時域和頻域分析，在此基礎上提出了一種新的fsk信號載波頻率測量方法?時域拼接結合現代功率譜估計的方法。
分享友人
分享到 Line

分享到臉書