cross spectrum 中文意思是什麼
cross spectrum
解釋
互頻譜-
The signal process function of the software include these function : digital filter, windowing, auto - correlation function and cross - correlation function, mean and variance, probability density function and probability distribution function statistic ; auto - power spectrum, cross - power spectrum, frequency response function, coherence function, cepstrum analysis based on fft ( fast fourier transfer ) ; joint time - frequency analysis based on stft ( short - time fourier transfer )
軟體的處理功能包括：數字濾波、時域加窗、自相關與互相關處理、均值和方差計算、概率密度和概率分佈函數計算；在快速傅立葉變換（ fft ）基礎上計算自功率譜、互功率譜、頻率響應函數、相干函數、倒頻譜分析；基於短時傅立葉變換（ stft ）的聯合時頻分析等。 -
Based on the propagation law of the cross - spectral density function in the space - frequency domain, the properties of polychromatic vector gsm beams through a paraxial optical abcd system are studied. the analytical propagation expressions for the cross - spectral density matrix of vector gsm beams passing through a paraxial optical abcd system are derived, which permits us to study the propagation properties of vector gsm beams, including the propagation - induced polarization changes, effect of the spectrum bandwidth and irradiance distributions in a unique way. there are some applications of the theoretical results
基於空間一頻率域中交叉譜密度函數的傳輸理論，研究了多色矢量gsm光束通過abcd光學系統傳輸時偏振特性的變化規律，首次推出了矢量高斯一謝爾模刑fgsm ）光束通過近軸abcd光學系統交叉譜密度矩陣的傳輸公式，並對矢量gsm光束傳輸中偏振的變化、譜寬的影響和強度的分佈等進行了統一研究。 -
As an example, polarization changes in vector gsm beams propagating through a telescopic system have been analyzed and illustrated by numerical results. it has been found that propagation - induced polarization changes are non - uniform across the beam cross - section. for the symmetric gaussian spectrum, the effect of the bandwidth on the polarization is barely noticeable
以望遠鏡系統為例進行的數值分析表明，多色矢量gsm光束的偏振不再是均勻偏振，對源光譜為對稱分佈高斯型的多色矢量gsm光束，譜寬對光束偏振特性的影響不明顯。 -
With the rising demand ever, the orbital resource and frequency spectrum resource for gso communication satellite has been almost fully exploited and utilized, by means of cross polarization, multi coverage, and orbital space reduction
隨著通信需求的增長，人們採用極化復用、空間復用和縮小軌位間距等手段，對靜止衛星軌位和無線電頻譜資源作了接近極限的開發利用。 -
The acoustic pressure information and particle velocity information are used to study the direction of the arrival estimation by analyzing strong linear spectrum of the single target basing on cross spectrum method
摘要利用矢量水聽器收集到的聲壓和振速信息，研究基於互譜法分析單目標的強線譜來進行目標方位估計。 -
All cross sections of neutron induced reaction, elastic scattering angular distribution, neutron energy spectrum and double differential cross sections were calculated by using optical model and the semi - classical model of multi - step nuclear reaction processes based on the hauser - feshbach and exciton model in the energy region up to 20mev
應用光學模型和以復合核平衡態理論（ hauser ? feshbach理論）及激子模型為基礎的核反應多步過程的半經典理論，計算了當中子入射能量低於20mev時n + ~ （ 112120 ） sn反應的所有中子入射截面、彈性散射角分佈、出射中子能譜以及出射中子雙微分截面。 -
On this condition, based on the experimental results gotten by the microwave absorption dielectric - spectrum measure technique, the photographic process at room temperature in agcl cubic microcrystals doped with k4fe ( cn ) 6 is simulated. through the optimization of simulating parameters, not only the cross - section and trap depth of the shallow electron trap induced by the dopant, but also the optimal doping amount is obtained
在此基礎上，以微波吸收介電譜檢測技術的實驗結果為依據，對摻有k _ 4fe （ cn ） _ 6的agcl立方體微晶在室溫下的曝光過程進行了模擬，通過調節模擬參數，不但計算出由摻雜劑引入的淺電子陷阱的俘獲截面和陷阱深度，而且得到了這種摻雜乳劑的最佳摻雜濃度。 -
In the first session the fans vibration on - line monitoring system is realized with vc language, also compile auto power spectrum density function, cross power spectrum density function, autocorrelation function and cross correlation function etc spectral analysis function to carry through simple offline fault diagnosis
首先用穩定性強、擴展性好的vc + +語言開發了通風機振動在線監測系統，並編寫了自功率譜密度函數、互功率譜密度函數、自相關函數和互相關函數等頻譜分析函數來進行簡單的離線故障診斷。 -
The various functions inside the virtual spectrum analyzer introduced in the paper is time domain wave analysis, fft transfer, ifft transfer, cross analysis, and so on, which are all described in function controls. finally, this paper introduce the assemble of intelligent controls - oriented virtual instrument. and use classical signals and industrial practices to demostrate the accurate of virtual spectrum analyzer
本文介紹的智能控制項化頻譜分析儀所具備的功能，有信號的時域分析、 fft變換以及ifft反變換、信號的微積分運算、信號的頻譜分析、信號自功率譜密度函數計算、信號互功率譜密度函數計算、頻率響應函數計算和相干函數計算，都是集成在功能控制項裏面的。 -
Information of system auto and cross spectrum, auto and cross correlation. coherent function, signal to noise ratio, frequency response and impulse response was established to help the study and arrangement of the module components
由力規及加速規兩量測之時域訊號，經快速富利葉轉換，計算其自頻譜及互頻譜，再經反富氏轉換回時域之自相關及互相關函數、相通函數、訊噪比、頻率響應函數、脈沖響應函數。 -
For the next, it studies the theory of auto - cross spectrum density method and stochastic subspace identification method
其次，研究了自互譜法和隨機子空間法的理論。 -
Secondly, we apply tk operator to the cross - correlation of received signal code and pn code to separate the multi - paths. it comes to a conclusion that tk operator can separate the multi - paths within less than the chip period accurately of spread - spectrum system with space - modulation by simulation. at last, we apply this algorithm to the practical signal collected by gps tap, and from the result we can drop a conclusion the tk algorithm is practical
本文首先闡述了時空調制擴頻信號原理以及在多徑干擾下時空調制接收機的性能和teager - kaiser接收機的原理;接著對時空調制擴頻系統的解調信號與偽碼的互相關函數採用tk接收機進行多徑分離，模擬結果表明， tk接收機對時延在一個碼片內的時空調制擴頻通信多徑信號有很好的分離效果;最後用數據採集器對一個gps信號進行接收和多徑的估計，驗證了該演算法在實際的運用中對多徑的擴頻信號有很好的分離效果。 -
This paper also show a rough estimate of the gains of this array, because it needs one year ' s data to collect one year ' s noise correlation variation curves and then give a more practical detection ability of the seismic array. one result of this paper is " seismic array site survery data processing software " exploited by the author. the software can calculate the power spectrum of noise for every site, noise coherence function for every site pair, the cross - correlation curves, the root mean square of noise for every site and the array response
此外還計算了該臺陣的臺陣響應，發現臺陣響應的主瓣高而尖；旁瓣很小，這歪姐鈕遠宣腔撾踏數公鍍壁韶逼上攏唆精確啻應：有關此臺陣的檢測能力，只能給出一個粗略的估計，因為評價一個臺陣對地震事件的檢測能力需要獲得為期一年的觀測資料，才能給出一年內噪聲場變化的相關值曲線，最終給出更加符合實際的臺陣檢測能力。 -
Moreover, the cross section of 481nm and 650nm upconversion emission have also been calculated. the author has measured the absorption spectrum of the npre - 1 glass and observed a strong absorption near 970 nm
4 ）通過對npre - 1樣品吸收譜的測量，可看到在970nm附近有一很強的吸收峰，適合於採用ld激光泵浦。 -
Cross spectrum analysis is made between aam, torque, sst and lod. it is found that significant correlations exist between those series on time scales of shorter than one year
交叉譜分析表明，在小於一年周期上，角動量、山脈和摩擦力矩、尼諾三區海溫、日長間都存在著顯著相關關系。 -
As a classical and practical method in ambient vibration experimental modal analysis, auto - cross spectrum density method replace the frequency response function with power spectrum and achieve its mode shape from transmissibility between the response signals and reference signal
自互譜法作為環境激勵實驗模態分析的一種實用的經典方法，用響應點和參考點間的功率譜曲線來代替頻響函數曲線，並由響應點和參考點之間響應的傳遞率得出振型。 -
Underwater target identification based on the methods of bearing and cross - spectrum
基於方位走向法和互譜法的水中目標識別 -
For the development of data signal processing module of sound intensity, the cross - spectrum sound intensity technique is applied
對于聲強數字信號處理模塊部分，採用互譜聲強技術作為其理論基礎進行設計。 -
By deducing the theory of this method, it comes to a conclusion that auto - cross spectrum density method is much the same as peak picking method based on frequency response function. and it also talks about the virtues and defects of the method
本文通過對相關理論的推導，說明了自互譜法與基於頻響函數的峰值攝取法是近似相通的，同時對該方法的優缺點作了敘述。 -
There is a focus on application of the stochastic subspace identification method in this article. for its defect in application of engineering, it also studies auto - cross spectrum density method which is classical in engineering, and it can be used as a supplement
針對隨機子空間法在工程應用中耗時長的不足，本文還研究了工程應用中比較經典的自互譜法，該方法可以作為隨機子空間法的補充。
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