modal noise 中文意思是什麼
modal noise
解釋
模式噪聲-
Modal analysis of k5206nm compressor block is done, and the acoustic radiation modal parameters are calculated, then the acoustic radiation properties of the compressor block can be obtained, which provide the basis for the low noise compressor block design
對k5206nm壓縮機機體進行了模態分析和聲輻射模態參數計算，獲得了機體的聲輻射特性，從而為機體的低噪聲設計提供了依據。 -
The algorithm of strapdown inertial navigation system is also discussed and then use the flight - track generator to give a simulation, since a closed loop feedback integrated navigation system is designed in this paper, and the output of the filter must feed back to the strapdown inertial navigation system, the analysis of the algorithm in strapdown inertial navigation system is important. the scheme to design the trajectory of gps and the simulation of gps constellation are then studied, the simulation of gps constellation is given from the calculation of vernal equinox base on the principle of celestial mechanics, this method of different from other methods given by other paper and is useful to the research of satellite navigation system. a new method to abstract noise modal in integrated navigation system is proved to be useful in practice, this method, which is given by use the principles of stochastic processes, statistics, time series analysis, and system identification, is suitable for the kalman filter in integrated navigation system
如航跡產生器的設計，該航跡產生器是研究組合導航問題的前提，從國外一些研究組合導航系統的文獻中可以看出，設計這樣一個航跡產生器是非常必要的，所以本文自行設計了這樣一個系統；還討論了捷聯慣性導航系統中捷聯解算的方法，並進行了模擬研究，由於在本文設計的閉環反饋式組合導航系統中，對捷聯慣導系統的平臺誤差進行閉環控制，需要將濾波器輸出的校正量反饋到捷聯解算內部，所以必須對捷聯解算進行深入的研究和分析，更何況捷聯解算問題本身也是導航界的一個熱門研究課題；另外，本文還介紹了gps軌道及其星座模擬的設計思想和方案，與以往gps軌道和星座模擬不同的是本文從天體力學中計算春分點開始，逐步進行gps軌道及其星座模擬，這樣的設計方法對從事衛星導航的研究工作是有價值的；還對組合導航中誤差建模方法進行了研究，綜合運用隨機過程、概率統計、時序分析及系統辯識等方面的理論提出了一套適合組合導航卡爾曼濾波的誤差建模方法，並運用實際研究工作中的測量數據對該方法進行了驗證。 -
( 3 ) introducing the proportional damping, the finite element formula of structural - acoustic coupled system lined with sound absorbing materials is obtained. mode - superposition technique for modal frequency response analysis of coupled structure - acoustic systems is also used to deal with the sensitivities of the eigenvalues and eigenvectors of coupled systems for the purpose of reducing cavity interior noise in theory
討論了阻尼降噪問題，建立了有阻尼聲振耦合系統的有限元模型，採用振型疊加法，將系統位移轉換到以固有振型為基向量，進行結構壁面有吸聲材料的聲振耦合系統響應的有限元分析與靈敏度分析，推導了比例阻尼條件的靈敏度計算公式。 -
Frequency domain multiple input output modal parameters identification with consideration of stochastic noise
計及隨機噪聲的頻域多輸入多輸出模態參數識別 -
The main work of this thesis includes two aspects : ( 1 ) modal identification based on wavelet transformation a equation of hard threshold wavelet de - noise is reasoned out from mse function
本文的主要工作分為兩個方面： （ 1 ）基於小波分析的模態識別根據最小均方差（ mse ）函數，本文推導了一個硬閾值小波消噪方程式。 -
There are three main approaches to predict the noise level : similitude structure method including the frequency - response method and proportion method, modal method including finite element method ( fem ) and boundary element method ( bem ), and statistical energy analysis ( sea ). the advantage of similitude structure method is to give the predicting data fast, but it has some error because of dealing with rough similitude parameter and mass load
目前對噪聲預示主要有三個方法：一是相似結構外推法，包括頻率響應法和比例法等；二是傳統的模態方法，包括有限單元方法（ finiteelementmethod ， fem ） 、邊界單元方法（ boundaryelementmethod ， bem ）等；三是統計能量分析方法（ statisticalenergyanalysis ， sea ） 。 -
The new measure can efficiently evaluate the match degree of two images, with little restriction of the gray level properties. it also supplies strong noise tolerance. new measure can be applied to one - dimensional or multi - dimensional multi - modal image registration
該準則能夠有效地衡量圖像的配準程度，對圖像的灰度屬性之間沒有苛刻的要求，對圖像中的噪聲也有很強的容忍性。 -
From the modal analysis, it can be said that the main reason of the noise pollution of water supply system is the resonant vibration which is caused by pressure pulsation
模態分析更進一步明確了壓力脈動誘發管道共振是噪聲污染問題的主要根源，為系統減振降噪提供依據。 -
We put forward tentative idea of multi - modal hybrid noise, which provides mathematical model for studying more general circumstance
提出了多模混合噪聲的設想，為研究更一般的情形提供了數學模型。
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