power spectral density 中文意思是什麼
power spectral density
解釋
功率譜密度-
Therefore, in principle the scattering may be predicted from measurements of the surface profile. in this paper the author also discussed nonspecular scattering for mo / si multlayer coated primary and secondary mirrors of the measured schwarzschlid optics based on power spectral density of these mirrors measured by both optical profilometer ( wyko ) and atomic force microscopy ( afm )
因此，我們可以通過檢測多層膜反射鏡基底的粗糙度來表徵多層膜反射鏡非鏡面散射對光學系統性能的影響，亦即通過檢測多層膜反射鏡基底的粗糙度調整拋光工藝參數，獲得低散射的多層膜反射鏡。 -
By solving the stochastic differential equations describing the noise performance of the cmos gilbert mixer, the time - varying power spectral density of its output noise at high frequencies is given
通過求解描述cmosgilbert型混頻器噪聲性能的隨機微分方程，本文給出了該類型混頻器高頻輸出噪聲的時變功率譜密度。 -
3. the frequency differences are determined by both the power spectral density ( psd ) and cepstrum of ambient vibration measurements. a matlab - based toolbox is developed, in which the differences of the higher adjacent frequencies can be easily evaluated
3 .使用功率譜頻差法和倒頻譜頻差法，開發了基於matlab平臺的斜拉索環境振動基頻識別gui工具箱。 -
For sand, glass bean, quartz sand and pvc, pressure fluctuations were measured at different conditions. furthermore, statistics analysis, power spectral density ( psd ) analysis and chaos analysis of pressure fluctuations in gas - solid cfb were conducted. an investigation of the effect of circulating solid flux, superficial gas velocity, height from riser bottom and particle property on the parameters ( e. g
本文測定了河砂、玻璃珠、玻璃砂和pvc四種顆粒在不同固體循環量、不同表觀氣速、不同軸向高度下的壓力波動，進而對氣固循環流化床壓力波動時間序列進行了統計分析、功率譜分析和混沌分析。 -
To study the periodical electromagnetic pulses with random timing jitter radiated by electromagnetic pulse transmitters, the psd ( power spectral density ) of periodical electromagnetic pulses with random timing jitter was obtained based on the analysis of the - function of the psd of timing jitter
摘要針對工程實踐中電磁脈沖發射機輻射的隨機時間抖動周期性電磁脈沖信號，在分析隨機時間抖動周期-函數功率譜密度的基礎上，得出了隨機時間抖動周期性電磁脈沖串的功率譜密度。 -
In order to obtain these data, we must at first calculate apsds ( auto - power spectral density ) and cpsds ( cross - power spectral density ) of the three signals in the system
而想要得到這些核心參數，必須先分析估計出系統中三路信號的自功率譜密度和兩兩之間的互功率譜密度。 -
Some characteristics of the measured wind pressure field were discussed, including distributions of wind pressure, the effects of shape ratio on total wind force coefficients, auto - and cross - power spectral density ( psd ) distributions of fluctuating wind pressure, characteristics of the proper orthogonal decomposition ( pod ) results of the measured wind pressure field, effects of reynolds number on wind pressure distributions, etc
根據測量結果對殼體表面風壓場特性進行了分析，包括風壓系數、整體風力系數、脈動風壓自功率譜及互功率譜、風壓場本徵正交分解特性、雷諾數對殼體表面風壓分佈的影響等。 -
Power spectral density analyzer
功率譜分析儀 -
Testing the vibration acceleration signal of rail top ( lateral and vertical ), rail middle ( lateral ), rail bed side ( vertical ) and rail bed middle ( vertical ) with dasp vibration testing system, calculation of signals obtains the power spectral density and frequency response curves of different position
測試橫向和垂向激振力下鋼軌不同部位的振動信號，進行頻譜分析，得出不同部位的頻率響應曲線。通過對頻響曲線的分析，得出不同方向激振力下鋼軌振動能量集中的頻率，確定不同方向激振力下鋼軌的主要振動部位和振動形式。 -
Base on the model founded, this paper assessed the ride performance by analyzed the root mean square value of power spectral density of acceleration of z - axis and round y - axis rotation acceleration at the driver ’ s seat. the root mean square value of suspension working spaces and dynamic tyre loads were also analyzed. base on the assessing system of vehicle ride performance, the root mean square
根據模型建立的實際情況，對車輛標準載荷情況下的平順性指標進行了計算，對人體感受到的振動採用了垂直方向和繞橫軸轉動方向的加權振級來評價，計算了車輛懸架系統的動撓度均方根值和各車輪相對動載荷均方根值的情況，全面的評價了車型的平順性。 -
In the paper, firstly, present the formulation and application of proper orthogonal decomposition of covariance and cross - power spectral density matrices are presented in the analysis of wind load effects on structures. then the dynamic response of linear structures subjected to random loads is analyzed by a technique called double modal transformation ( dmt ) that is expressed through a double series whose terms depend on structural and loading modes
本論文中首先通過求相關矩陣和互功率譜密度矩陣特徵值問題給出了本徵正交分解的公式，並利用pod與結構模態相結合的雙模態方法來分析結構的動態響應，主要討論了截斷高階荷載模態對風致響應的影響。 -
The power spectral density of ship ' s motion is calculated based on ocean wave energy spectrum, and the movement spectrums of the ship ' s random motion are calculated and created
根據海浪波能譜，計算了艦船搖蕩運動的功率譜密度和艦船的隨機搖蕩運動。 -
The virtual digital signal processing instrument is developed with vc + + 6. 0 and matlab 6. 0 in windows 98. the system has realized signal generator, signal ' s sampling and averaging function, signal ' s power spectral density and cross special density analysis, the design and application of digital filter, signal analysis in time, frequency and inverted frequency domain
該系統的工作環境為windows98 ，開發工具為visualc + + 6 . 0和matlab6 . 0 。實現了波形發生器的設計、信號採集及平均處理、濾波器的設計及應用、信號的時域、頻域以及倒頻域分析。 -
Spread spectrum technique, which can handle variable adverse environments, exhibits unique qualities that have a number of advantages in anti - jamming, anti - noise, reduction of multi - path interference, low power spectral density, privacy, selective addressing and code division multiplexing
擴頻通信技術具有優越的抗干擾、抗噪音、抗多徑衰落性能，能在低功率譜密度下工作，具保密性、可多址復用和任意選址，能有效克服各種惡劣的通道特性，目前廣泛應用於移動通信、雷達、導航、測距、電力線通信等領域。 -
Moreover, we put forward many schemes to erase errors such as static error, dynamic error, or make them little. especially we dicuss how to deal with the phase - shifting cell ( pzt ) and interferogram. in the end we bring forward two methods to estimate the contour of piano : one is traditional parameter, the other is power spectral density ( psd )
提出從兩方面對面形進行評價，一是用傳統光學像質評價指標，二是利用psd從頻譜角度評價面形，從而為高精度檢測和控制大口徑光學元件表面面形（波前）提供了依據。 -
Moreover, close - form expressions for the power spectral density and acpr of cdma signal passed through a nonlinear power amplifier are derived using the power series and statistical model of cdma signal. the comparison computer between algorithm simulation and practical data or experimental data derived using ads proves the validity
同時基於cdma信號的時域數學模型和功率放大器的冪級數模型，具體推導出cdma信號的功率譜密度和acpr的數學表達式，並將其演算法模擬結果與實測結果以及ads實驗模擬結果相比較，驗證其正確性。 -
Analysis and control of power spectral density for impulse uwb communications system
脈沖超寬帶通信系統功率譜分析與控制 -
Power spectral density
功率譜密度 -
The paper analyses the signal processing with emphasis on signal to noise ratio ( snr ) in output of correlator and snr in signal power spectral density
並對演算法處理中相關器輸出中的信噪比（ snr ）和功率譜密度中的snr進行了重點分析。 -
In this paper, ar power spectral density estimate by way of burg is provided in analysis and capturing the feature of adventitious respiratory sounds
利用bp神經網路對異常呼吸音進行分類識別，提出了評價人體呼吸系統生理狀況的方案，這對分析病人的呼吸系統疾病有重要意義。
分享友人