查询词典 aliasing

Phase theory analysis of spatial integral sampling provide theoretical basis for under sampling aliasing reduction.

空间积分抽样相位理论分析为消减欠采样产生的折叠混淆效应提供了理论依据。

Trace interpolation plays an important role in seismic data processing. Spatial aliasing is a principal troublesome problem in seismic trace interpolation.

道间插值方法在地震资料处理中具有十分重要的作用，而地震道空间内插所面临的主要问题是空间假频。

With the development of computer and graphics technology, the advanced dashboard of an aircraft has brought about a great challenge to the quality of the graphics.Based on the cause of the aliasing, the thesis below puts forward a new method using Gaussian Integration to get rid of it and offers detailed mathematical deduction as well. Furthermore, the practical generation of rhumb lines has proved the effectiveness of the new method

随着计算机及图形学技术的发展，座舱仪表对图形显示的质量提出了更高的要求，本文主要从图形走样产生的根本原因出发，提出利用高斯积分法来消除走样现象，且给出了较详细的数学推导，并将此算法应用于罗盘刻度线的生成，效果比较明显。

Also,it can overcome frequency aliasing effect in general subband coding,and is more flexible than the resolution-layered coding which uses temporal subsampling and spacial filter.

另外，它比采用时间方向亚抽样和空间滤波器的分辨率分层方法更灵活，并克服了频率混叠现象。

The Hilbert amplitude envelope of the stator current includes the low frequency of fault characteristic, thus it can reduce the signal length by resample the Hilbert amplitude envelope of the stator current by downsampling, which can avoid spectrum aliasing. Then it can reduce the computation time of the MUSIC Method for the spectrum analysis to the resampled signals for the given bandwidth. Meanwhile combining continuous subdivision Fourier transform and rotor slot harmonics based slip estimation it can in advance estimate the concrete values of the fault characteristic frequency, and then inquiry purposely the fault feature component information in the stator current spectrum in order to accomplish the broken rotor bar fault with high sensitivity and h reliability, which eliminates adverse effect of issuable false peaks to the fault detection and formed a novel scheme to detect broken rotor bar fault.

定子电流Hilbert幅值包络信号包含了低频的故障特征频率调制信号，故通过对定子电流Hilbert幅值包络信号进行降采样率重采样、减少分析信号长度，可避免低频段频谱混叠，再对减少的重采样数据进行具有超分辨率的MUSIC低频段估计，可大大降低MUSIC算法频谱估计时间；运用连续细化傅里叶变换和转子齿槽谐波转差率估计技术，可预知故障特征频率精确值，从而可有目的地查询故障分量，消除MUSIC虚假波峰对故障检测混淆的影响，大大提高了故障检测的灵敏度和可靠性，以此形成异步电动机转子断条故障检测新方法。

According to the similarity both in aliasing /separation of signal of the ICA model and the embeding/extraction process in the watermarking system, the scrambling image is embeded into the wavelet domain with the linear supraposition.

根据ICA模型中的信号混叠/分离与数字水印嵌入/提取过程之间的相通性，以线性叠加的方式将置乱水印嵌入到图像小波域的某些系数上，检测/提取时通过ICA技术提取水印。3。

Certain relevant concepts for Integal-Period Sampling , such as the orthogonality of the trigonometrical functions, Fourier coefficents, and aliasing effect etc. are extended to the case of NIPS.

进而将整周期谐波分析中的一系列概念，例如三角函数的正交性、Fourier系数，谐波分析中的关系，混迭等引伸到非整周期采样中来。

Whereafter, the manifestation of colour noise and colour aliasing were brought forth on frequency domain.

从实验结果中，给出了彩色混迭和彩色噪声在倒易晶胞中的表现。

In order to eliminate the aliasing, at each step of decomposition or reconstruction, fast Fourier transform is performed the result obtained by convolving the input signal with filters, setting frequency spectrum of the redunctant frequency components to be zero, and inversely fast Fourier transforms the result after zeroing. The result after processing is the input signal of next step,and single sub-band reconstruction is implemented to extract the feature item of GPS data sequence.

为消除频率混淆现象，分解与重构时，每作一次信号与小波卷积后，将其结果作一次快速傅立叶变换，频谱中多余的频率成分的谱值置零，再对置零后的频谱进行傅立叶逆变换，然后继续进行小波包的分解与重构，从而实现单子带重构提取GPS数据序列特征项。

Minifying digital images used downsampling introduces aliasing noise .

在降采样过程中不可避免地会引入欠采样噪声。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。