混疊 的英文怎麼說

Approach based on ica and gmm to identify mixing vibration targets

的混疊振動目標識別

But the signals mixture problem can be brought on by the drop of adaptive performance caused by using subarray and by overmany radiation sources. so bbs is used to solve the problem. this dissertation focuses on subarray architectures and the algorithms of ica, and proposes a new and more practical subarray architecture and a more suitable algorithm to separate radar signal

同時針對採用子陣法導致自適應性能下降以及現代雷達信號環境多個輻射源等問題引起信號混疊現象，論文採用盲分離來對雷達信號進行分離處理，並針對雷達信號的特點提出一種適用的演算法。

The paper is to design analogue lowpass filtering circuits with high performances. the circuits are used directly as anti - alias filters in an analogue front - end of video decoder ic ( integrated circuit )

=本文旨在設計高性能的模擬低通濾波電路，用作視頻解碼晶元模擬前端中的抗混疊濾波器。

The field of video signal processing is now undergoing a digital reform. the digital processing technique is clearly expatiated in this paper, such as a / d convert, anti - alias filter, clamp control, gain control, pll, synchronization circuit, color decoder, comb filters

本文詳細敘述了視頻圖像的數字處理方法，重點介紹了視頻信號數字化技術、抗混疊濾波器、箝位、增益控制、鎖相技術、同步時鐘產生、電視信號亮色分離、彩色解碼等技術，這些關鍵技術為視頻信號的數字化處理提供了重要的基礎。

4 ) a uniform crb expression of bearing estimation for spatially distributed sources in unknown noise environments is derived. more exactly, the crb performance of bearing estimation for spatially distributed sources in several typical spatially - correlated noises is evaluated theoretically and numerically, respectively. it is disclosed that the estimated errors mainly depend on space ambiguity between signal and noise components

4 ）推導了未知噪聲環境中空間分佈源波達方向估計的統一的crb表達式，分析了幾種典型的空間色噪聲情況下分佈源波達方向估計的極限性能，揭示了信號分量和噪聲分量之間的空間混疊對分佈源波達方向估計的決定性作用。

The fourth chapter : in this chapter, it introduces the hardware designing of the dsp system based on pci bus and states every module of the hardware designing : circuit of signal adjusting, filter circuit of anti - overlap, circuit of data - acquisition automatically, expanding circuit of dsp memory, circuit of voltage matching, interfaces circuit of pci etc. it also includes theoretic basis and procedure of pcb designing

第四章介紹基於pci總線的dsp系統硬體設計。敘述了硬體設計的各個模塊：信號調理電路、抗混疊濾波電路、自動數據採集電路、 dsp存儲器擴展電路、電平匹配電路、 pci介面電路等，以及pcb設計的理論基礎和設計過程，並給出了設計和調試的結果。

In this thesis, summarized the basic theories of fourier transformation and the fast fourier transformation that are generally adopted to detect and analyze the electric power harmonic in the electric power supply system. at the same time, summarized the even sample principle, the phenomenon of frequency mix, the window functions and the frequency leaking as so on, those are closely - related to sample from figure signal

簡要闡述了電力系統諧波檢測分析所普遍採用的傅利葉變換和快速傅利葉變換的基本理論以及與數字信號采樣密切相關的均勻抽樣定理、頻譜混疊現象、窗函數和頻譜泄漏等的基本理論。

Summarized no - line loads and the present situations of the electric power harmonic pollution in the guangyuan district ' s electric power supply system ; explained the theories of fourier transformation and the fast fourier transformation those are widely adopted by majority scholars to examine and analyze the electric power harmonic in the electric power supply system. summarized the principle of even sample, the frequency mix phenomenon, the window functions and the frequency leaking as so on, those are closely - related to the figure signal

簡要闡述了電力系統諧波檢測分析所普遍採用的傅利葉變換和快速傅利葉變換的基本理論，簡要闡明了與數字信號采樣密切相關的均勻抽樣定理、頻譜混疊現象、窗函數和頻譜泄漏等的基本理論，同時闡述了電力系統的諧波檢測與分析的相關理論基礎知識。

The application of two kinds of anti - aliasing filter circuits

兩種抗混疊濾波電路的運用

Lastly, the paper designs an example and tests its amplitude frequency response. at last, this paper points out that this method can efficiently control the performance of narrow band fir digital filters. both test and application indicate that practical performance and ideal performance are almost identical

在此基礎上給出窄帶fir濾波器的詳細結構，分析了窄帶fir濾波器的多級實現原理，並且對窄帶fir濾波器的的基本特性進行了分析，這些特性包括：頻率特性、抗混疊特性、去鏡象特性。

According to the impact of higher voltage harmonic, an algorithm of harmonic analysis based on anti - alias fourier transform is discussed. compared with the traditional way, fft harmonic analysis, the algorithm increases the monitoring precision and the veracity

針對系統電壓高次諧波對監測結果的影響問題，提出了基於抗混疊傅立葉變換（ faft ）的諧波分析法，獲得有利於故障診斷的監測參數。

To detect transient signals under complex background, a novel method of aliasing - free exponential bilinear time - frequency distribution is presented in this paper, which can avoid the frequency aliasing and information loss existing in the traditional bilinear distributions, reduce the cross - terms effectively and possess high time - frequency resolution

摘要針對復雜背景條件下瞬時信號的探測，提出一種新的無混疊雙線性時間頻率分佈方法，該方法能夠避免常用的雙線性時頻分佈中的頻率混疊與信息丟失，有效減小交叉項干擾，而且具有較高的時頻解析度。

The paper designs a more lpf and a numberical filter to eliminate the error, and a frequency tracing tache because system frequency fluctuates ceaselessly. this guarantes synchronization sampling

為了消除頻率混疊帶來的誤差，專門設計具有較好性能的低通濾波器和數字濾波器；由於系統頻率波動性，設計有硬體電路組成的頻率跟蹤環節，最終實現采樣周期和信號周期同步。

It is very constructive to get power quality parameter in time. in this paper, we study the power quality parameter arithmetic in difference and research tune wave measure in particular. we give a new method based on transform of the shannon wavelet packet interpolation in frequency domain

本論文研究了電能質量各參數的測量演算法，特別是針對目前頗受關注的電網諧波檢測技術進行了深入的探討，提出了一種shannon小波頻域內插的小波包分解諧波檢測方法，模擬試驗表明該方法達到了很好的抗混疊效果，同時還能檢測出諧波中的高頻成分以及電網中的次諧波干擾。

Because the calculation and display of visual is digital signals, the targets picture may be present to mixing and disappearing, when it is farther and its picture on the screen outrun the display resolution ability

由於視景環境的解算和顯示是數字信號處理機制，當靶標較遠時，靶標的圖像如超出屏幕顯示解析度顯示能力時，出現圖像丟失和混疊現象。

The new system has strong data manage ability, it can manage the database easily. it also can be improved easily and get deal with human friendly. especially it improve tune wave detection and can realize remote control

新型電能質量參數檢測系統，數據處理功能強、數據管理方便、系統升級簡單、人機交互性好，特別是解決了諧波檢測中的抗混疊現象，並且能進行遠程監控，具有較大的使用價值和廣闊的應用前景。

It mainly includes following aspects : in this paper, firstly implication of wavelet analysis in signal harmonic component extraction is presented in detail, and on this foundation signal given frequency band component extraction method is proposed. then we investigate frequency aliasing phenomenon, reason why frequency aliasing phenomenon is easy happened when wavelet is implied in field of motor fault diagnosis, and frequency bands where frequency aliasing phenomenon is easer happened, and put forward approved morlet wavelet analysis method which can effectively alleviates frequency aliasing phenomenon. third we set up vibration signal detected system, design experiments to obtain three groups of fault signals : eccentricity fault, mixed fault of eccentricity plus mild rub, mixed fault of eccentricity plus moderate rub, and process these data using analysis method proposed in this paper

首先對論文的選題以及相關背景進行了探討，並對相關的小波基礎理論進行了闡述，主要針對感應電動機的偏心故障和偏心+碰摩復合故障形式及相關的應用演算法進行了詳細探討，主要工作內容包括下面幾個方面:在論文中，首先對小波分析在信號的諧波分量提取中的應用進行了研究，在此基礎上，提出了信號的特定頻帶成分的提取方法;研究了小波分析的頻域混疊現象，探討了小波分析應用於電機故障診斷領域時易發生頻域混疊現象的原因，以及混疊現象較易發生的頻帶，提出了可以有效減輕頻域混疊現象的改進的morlet小波分析方法;搭建了振動信號檢測系統，設計實驗採集得到三組故障數據:偏心故障，偏心+輕微碰摩復合故障，偏心+中度碰摩復合故障，並對這些數據應用本文提出的分析方法進行信號處理，提取出的特徵參數可有效區分這兩種故障形式;研究了基於matlab和labview的混合編程方法，完成了電機故障檢測系統的軟體開發。

The process of reducing the visibility of aliasing by using gray scale pixel values to smooth the appearance of jagged edges

用有灰度的象素值去平滑鋸齒形邊緣的出現，以減小混疊效應的可見性的處理技術。 ）

Analysis of aliasing artifacts in 16 - slice helical ct

中混疊假影的分析

Specifies that text is rendered using the cleartype antialiasing method

指定使用cleartype抗混疊方法呈現文本。