spectral amplitude 中文意思是什麼
spectral amplitude
解釋
頻譜振幅-
A random signal of known statistical properties of amplitude, distribution, and spectral density
振幅、分佈及譜密度等的已知統計特性的隨機信號。 -
Ds signal is twice modulated with the rapid pseudorandom noise sequence and the carrier. so it appears cyclostationary. in the field of spectral correlation, ds signals appears its characteristic as fallows : for the amplitude of spectral correlation, the information of carrier frequency and pn code rate are contained on the spectrum frequency equal to zero sheet, and also the pn code rate is contained on the sheet of spectrum frequency equal to carrier frequency ; for the phase of spectral correlation, the information of carrier initial phase is contained on the sheet of cyclic frequency equal to double carrier frequency
Ds信號是經過高速偽隨機序列和正弦載波二次調制的寬帶信號，因此具有周期平穩特性，它在譜相關域表現為:幅頻特性在譜頻率等於零截面切片上包含了載頻和偽碼速率信息特徵，在譜頻率等於載頻截面切片上包含了偽碼速率信息特徵;相頻特性在循環頻率等於兩倍載頻截面切片上包含了載波初相信息特徵。 -
The authors collected the spectral data of wheat in different occasion, got rid of the noises which happened in the course of measuration by ways of averaging near spectral data and ways of setting limiting figure to amplitude, then the most important characteristic points were gained
然後根據實測的3個不同時期小麥的反射率曲線，在進行了均值去噪處理之後，設定振幅閥值，排除了殘余噪音干擾，從而提取了曲線最重要的特徵點。 -
2 ) fourier amplitude spectrum analysis : ( 1 ) the fourier amplitude spectra decrease with the increment of depth ; and the components of fourier spectrum become complex in near - surface. ( 2 ) the fourier amplitude decrease faster in shallow soil level, and smaller in deep soil level. ( 3 ) compared with the deepest bedrock fourier spectrum, spectral components of higher than 5 hz decrease with depth decrease
2 .地震動傅立葉振幅譜沿深度的變化規律（ d隨著深度的增大，傅氏譜振幅逐漸減小;越接近地表傅氏譜的頻譜成份越多，形狀越復雜;傅氏譜振幅值在淺層沿深度的下降梯度較大，在深層下降較小; 「土層/基巖」場地的基巖內_匕下兩測點的地震動頻譜沿深度幾乎不變，傅氏譜十分相似; d基巖以上的土層測點，高於shz的高頻成分減少。 -
And an approach is given to seek the response amplitude needed by spectral analysis method aiming at simplified the response amplitude seeking procedure
針對譜分析方法中需要求得響應幅值的特點，給出了一種簡化分析過程的方法。 -
Because of the good sensibility, ultrasonic narrow band signal analysis technique with 1mhz central frequency was chosen to differentiate the heat treatment samples above - mentioned. there are obvious differences among heat treatment products in principal frequency, spectral peak ' s quantity, amplitude and distribution. that is to say, the technique of ultrasonic narrow band power spectral can be applied to characterize the microstructures of multi - phased alloy steels
利用窄帶信號頻譜分析技術靈敏度高的突出優點，選取中心頻率為1mhz的窄帶超聲信號，對上述不同熱處理試樣進行超聲功率譜分析，發現不同熱處理產物在功率譜主頻率、譜峰特徵（幅度、數量、分佈）等方面，都存在不同程度的差異。 -
Fibre optic interconnecting devices and passive components - basic test and measurement procedures - examinations and measurements - measurement techniques for characterizing the amplitude of the spectral transfer function of dwdm components
光纖互連裝置和無源元件.基本試驗和測量程序.檢驗和測量. dwdm元件光譜傳輸功能的振幅特性化的測量技術
分享友人