scale of noise ratio 中文意思是什麼
scale of noise ratio
解釋
信號雜音比-
Area electronic buoys system is a large - scale underwater sound equipment of tracking and locating moving objects such as submarines, torpedoes and ships. with advanced vector sensors as detective devices, it has excellent antinoise performance, and its signal noise ratio is high
區域電子浮標系統是一套大型的水聲跟蹤定位設備，其主要任務是準確跟蹤和定位海上多個運動目標（如潛艇、魚雷、船隻等）的運動軌跡。 -
On the basis of geometric correction for remote sensing images data, detailed character analysis was conducted for the tm images. several image transformations which are linear scale transformation, ratio processing, principal components transformation, tasseled - cap transformation and minimum noise fraction rotation ( mnf transformation ) were then implemented
在對研究區數據進行幾何精校正的基礎上，對tm數據進行了詳細的特徵分析，並對其進行了有利於植被信息提取的幾種圖像變換：線性拉伸、比值增強、主成分變換、纓帽變換以及最低噪聲分離變換（ mnf變換） 。 -
To this paper we were carried tentatively on spectrum whitening in prestack, and each section after division scale is processed with spectrum whitening, particularly the composition of high frequency is raised apparently, the signal - noise ratio of high frequency raise. the resolution of whole section is better than stack
本文還嘗試性地在疊前進行譜白化處理，對分尺度后的各個記錄分別進行譜白化，尤其是高頻成分提高得很明顯，有效地提高了高頻信噪比，整個剖面的解析度明顯增強。 -
Doing the further research on the division frequency stack on the foundation of study of predecessor, at first the residual moveout correction is done to the seismic record, make the phase axle regularity, doing foundation for the same phase stack ; then carried on division scale processing by wavelet transform ; spectrum whitening is done to each scale, the high and low frequency band need to do prolongs, the middle frequency bands only increase the value of the frequency spectrum ; several kinds of methods that estimate the value of signal - noise ratio has been studied further, and summarize their advantage and disadvantage as well as the scope of application ; the seismic record after spectrum whitening is stacked by weighting with the value of the signal - noise ratio ; then estimate the value of signal - noise ratio which is each scale section after stacking, the scale that the signal - noise ratio is big is assigned big weighting, otherwise, the scale that signal - noise ratio value is small is assigned small weight ing, and carried on weighted reconstruct to each scale section
本文在前人研究的基礎上，在分頻疊加方面做了進一步的研究。首先對地震記錄進行剩餘時差校正，校齊同相軸，為同相疊加做好基礎工作；然後對地震記錄用小波變換的方法進行分尺度處理；對各個尺度分別做譜白化，對于高、低頻段需要做頻帶延拓，中間頻段僅提升頻譜值；對于幾種信噪比定量估計的方法進行了深入的研究，並且總結了它們的優缺點以及適用范圍；對譜白化后的地震記錄用信噪比估計值作為加權系數進行加權疊加；對于各尺度的疊加剖面也進行信噪比估計，對于信噪比大的尺度給予大的加權系數，反之，信噪比值小的尺度給予小的加權系數，對各尺度疊加剖面進行加權重構。 -
Firstly, introduce the design of sonar display, trace - to - trace correlation and gray scale display, develop a new method of gray scale based on signal noise ratio. and next, discuss array signal processing and image processing in order to improve the display. finally, develop a software of sonar display simulator based on object oriented programming, with which the sonar display console is simulated and the performance of sonar signal is tested
本文工作圍繞如何提高聲納顯示效果，介紹了聲納顯示屏幕的設計方案，論述了「跡跡相關」技術、灰度顯示技術在聲納顯示中的應用，提出了基於信噪比的灰度級別劃分方法；結合陣列信號處理、圖象處理技術，本文引入了子帶峰值能量檢測演算法、圖象邊緣檢測演算法，進一步提高了聲納檢測性能；基於面向對象的程序設計方法，設計了聲納顯示平臺軟體，為模擬聲納顯示、檢驗聲納信號顯示性能提供了模擬環境。 -
This can increase efficiently the signal - noise ratio of seismic record, under the general situation, the signal - noise ratio of big scale is small, because low frequency surface wave in big scale is more serious, the correlate of signal is smaller, so weighting stack can press efficiently low frequency surface wave, comparative promote the percentage of the effectual signal in constructing the signal
這樣可以有效地提高重構后地震剖面的信噪比，一般情況下，大尺度的信噪比都較低，因為大尺度內的低頻面波比較嚴重，信號相關性較小，這樣做加權可以有效地壓制低頻面波，相對地提升有效信號在重構信號中的百分比。
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