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- THE STOCHASTIC NEUTRON FIELD OF INDUCED FISSION AND THE MEASUREMENT OF THE AUTOPOWER SPECTRAL DENSITY RATIO 誘發裂變中子場及其功率譜密度比值測量法
- The method using HHT to estimate local spectral density is proposed. 本文給出了利用HHT估計地震地面運動局部譜密度的方法。
- 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。
- It provides a lot of accurate formulae for spectral density transforming into Allan variance. 本文推導了有限頻域[f_a,f_b]中的雜訊引起的修正的Allan方差公式,為雜訊的譜密度變換成Allan方差提供了準確的公式。
- We analyse statistics properties of ground clutters and study AR model of correlated clutters power spectral density. 分析了地雜波統計特性，研究了相關雷達雜波功率譜特性的AR模型及其模擬方法。
- 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。
- With the power spectral density, the vibration mechanism and the vibration transfer process of viaduct caused by the traffic load were introduced. 摘要從功率譜的角度介紹城市高架橋樑在交通荷載下產生振動的機理和振動的傳遞過程。
- The power spectral density of gearbox vibration signals is estimated by the periodogram from which original feature sets are derived. 為了使診斷結果更好地可視化,利用遺傳編程結果的固有隨機性,提取兩個新特徵指標。
- In practical application,one of the difficulties is the adjustment of the power spectral density function to various soil conditions. 在實際應用中,調整功率譜密度函數以適應各類場地土仍是一項困難的工作。
- Therefore, experience is needed to made good analysis.We dealt with the colonic pressure data by analyzing its power spectral density(PSD).The PSD is com... 本文對實際採集的結腸壓力信號進行功率譜密度分析,並與結腸的基本功能相對照。
- This paper presents a IJF coding method based on filter shaping, and deduces IJF power spectral density adopting this method.Finally this paper simply introduce FQPSK modulation. 本文介紹基於濾波器成形法的IJF編碼，並推導基於該法的IJF功率譜密度，在此基礎上簡要介紹了FQPSK調製體制。
- LSFRV is a stochastic process obeying Gaussian distribution whose standard deviation can be gotten by the longitudinal vibration pavement spectral density of running vehicles and the longitudinal vibration model of running vehicles. 行車縱剪力是服從正態分佈的隨機過程,標準方差可以通過行車縱振路面譜和車輛縱振模型得到;
- The study shows that enhancing the transmission rate of the NB system, as well as the power spectral density (PSD) of the UWB signal in the bandwidth of the NB system, will result in the higher BER of the NB system. 研究表明,提高NB系統的傳輸速率或增大UWB信號在NB系統的工作頻帶內的功率譜密度會減小NB系統的信噪比,增大NB系統的誤碼率。
- Wind tunnel model tests were conducted to investigate the power spectral density (PSD) and the coherence of the wind load on the CAARC standard tall building model in exposure categories B and D. 結果顯示:不同高度的無因次風荷載功率譜密度具有較好的一致性;在順風向,不同高度風荷載間的相干特性顯示出指數式的衰減規律;在橫風向,風荷載在漩渦脫落頻率附近有很強的相關性,相干函數值接近於1。
- The process is dealing with the echo by wavelet transform, obtaining 3D-time-fre- quency distribution and power spectral density, extracting modulating spectral density, then identifying target. 對雷達回波信號進行小波變換，得到目標回波信號的三維時頻分布圖和功率譜密度，從中提取目標的調製譜密度，根據最小貼近度識別演算法進行目標識別。
- This paper derived the recursive formula of autocovariance function and a three-stage algorithm of computing spectral density of MAR model,thus we solved spectral analysis problem of MAR model. 針對MAR模型導出其自協方差函數的遞推關係式及計算譜密度的演算法,從而從理論上解決了這一模型的譜分析問題。
- It is very important to study the signal to clutter ratio(SCR) and the power spectral density(PSD) of the clutter as a basis for studying the target detection in the background of clutters. 關於信雜比及雜波譜的研究對於雜波背景下目標的檢測具有重要的指導意義,然而窄帶雷達已有的相關理論在超寬頻雷達中已經不再適用,需重新進行研究。
- It can be shown that the power spectral density matrix of velocities and/or accelerations process of water particles in stochastic waves had only one non-nil independent eigenvalue and eigenvector. 結合橋墩基礎處不同深度水質點波動速度和速度的功率譜密度矩陣僅具有一個獨立特徵值的特點,推導了隨機波動模擬的簡化計算公式,簡化公式具有較高的計算效率。
- The statistical method for calculating the power spectral densities of of binary signals given by Bennett is extended to those df multi-state digital signals. 本文把Bennett給出的二進位數字信號功率譜密度的系統綜合演算法推廣到常見的多態數字信號。
- double frequency spectral density function 雙重頻率譜密度函數
