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neighborhood
相关语句
  邻域
    RCS Reconstruction of the High Resolution SAR Image Based on a Modified Correlated Neighborhood Model
    基于改进相关邻域模型的SAR图像RCS重构
短句来源
    Restoration of Noise Image Based on Neighborhood Information
    基于邻域信息的噪声图像的恢复
短句来源
    Research on size of neighborhood to estimate the variance of wavelet coefficient
    估计小波系数方差邻域大小的研究
短句来源
    Image fusion based on neighborhood features of wavelet coefficients
    基于小波系数邻域特征的图像融合
短句来源
    A Filter Algorithm for Salt and Pepper Noise Based on the Information of Neighborhood
    一种基于邻域信息的椒盐噪声滤波算法
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  “neighborhood”译为未确定词的双语例句
    We have designed and implemented an algorithm for discovering neighborhood and estimating the timeliness link quality between neighbors using active probing,passive overhearing and WMEWMA(Window Mean Exponentially Weighted Moving Average Estimator).
    采用主动探测和被动监听技术发现无线传感器网络中节点的入邻居和出邻居,并采用WMEWMA(Window Mean Exponentially Weighted Moving Average Estimator)预测邻居间链路最近通信质量.
短句来源
    A Fuzzy Traffic Predictor Using Nearest Neighborhood Clustering Learning Algorithm
    基于最近邻聚类学习算法的模糊业务量预测器
短句来源
    Fast best neighborhood matching algorithm based on successive elimination
    基于连续淘汰的快速自相似错误隐藏算法
短句来源
    Neighborhood reservation with in-band signaling system in Ad Hoc networks
    带内信令系统实现Ad Hoc网络的邻居预留
短句来源
    Robust Speech Recognition Based on Neighborhood Space
    基于邻接空间的鲁棒语音识别方法
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  neighborhood
Like the truncations of the Taylor expansion, the truncations of a chromatic expansion at t = t0 of an analytic function f(t) approximate f(t) locally, in a neighborhood of t0.
      
It is available for the case that the sign of f(x) changes frequently or the derivative f'(x) does not exist in the neighborhood of the root, while the Newton method is hard to work.
      
One allows the appearance of eight limit cycles in the neighborhood of infinity, which is the first example that a polynomial differential system bifurcates eight limit cycles at infinity.
      
Neighborhood union of independent sets and hamiltonicity of claw-free graphs
      
Let G be a graph, for any u∈V(G), let N(u) denote the neighborhood of u and d(u)=|N(u)| be the degree of u.
      
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This paper presents a high efficiency predictive coding scheme for multi-level images. In this coding scheme, continuous picture signals are considered as m-th order Markov process; the prediction value of each picture element is determined by a nonlinear function of its neighboring picture elements; and the nonlinear quantization is determined by the type of the difference of its neighboring picture elements. The proposed scheme can fully utilize the characteristics of picture signals within the neighborhood...

This paper presents a high efficiency predictive coding scheme for multi-level images. In this coding scheme, continuous picture signals are considered as m-th order Markov process; the prediction value of each picture element is determined by a nonlinear function of its neighboring picture elements; and the nonlinear quantization is determined by the type of the difference of its neighboring picture elements. The proposed scheme can fully utilize the characteristics of picture signals within the neighborhood of each picture element, with adaptive nonlinear prediction and quantization for each individual picture element. Therefore, higher coding efficiency is obtained, especially in the region of contours and textures of images. Computer simulations show that the reconstructed images with transmission rate of entropy value 2 bits/pel hardly show any visible degradations by comparison with the original images. The proposed nonlinear predictive coding scheme has higher efficiency and simpler implementation by comparison with the existing predictive coding methods. It is suitable for high-speed real-time transmission of different kinds of images.

本文提出了多值制图象的高效率预测编码方法。它把各类连续变化的图象信号当作m阶Markov过程,每个象素的预测值取决于其邻近象素的非线性函数,而对预测误差的非线性量化,则取决于其邻近象素增量状态的类型。这种编码方法,充分利用图象信号在每个象素邻近区域的具体变化特点,逐个象素进行自适应非线性预测及量化。因此,提高了编码效能,特别是在图象的轮廓边沿或交织结构部位。计算机模拟表明,当传输信号的熵值为2bits/pel时,主观上难以发现图象损伤。本文的编码方法与其他高效率预测编码方法相比,不仅预测效率高,而且结构简单,适用于各种图象的高速实时传输。

The switch-adaptive intraframe DPCM picture coding proposed in this paper is: (1) Every present pel (picture element) is determined as non-active or active from an activity value of its previous pel; and one of two adaptive predictors is switched on. (2) According to the minimum-difference direction of the previous pel with its neighboring pels, one of four sets of prediction coefficients is switched on for the prediction of present pel. (3) Two non-linear quantizers are designed from subjective tests for the...

The switch-adaptive intraframe DPCM picture coding proposed in this paper is: (1) Every present pel (picture element) is determined as non-active or active from an activity value of its previous pel; and one of two adaptive predictors is switched on. (2) According to the minimum-difference direction of the previous pel with its neighboring pels, one of four sets of prediction coefficients is switched on for the prediction of present pel. (3) Two non-linear quantizers are designed from subjective tests for the two adaptive predictors, corresponding to nonactive and active pels.Calculations with four test pictures show that, the prediction errors (without quantizer) of the proposed switch-adaptive predictor have its histogram more concentrated in the neighborhood of e = 0, and a decrease of entropy values (0.2 bit/pel in average) in comparison with 2-dim DPCM predictors with constant coefficients.Subjective tests are simulated with three sets of sequence pictures of the sampling frequency 10 MHz. Masking functions are measured to design non-linear quantizers with a minimum number of levels criterion. The minimum number of quantization levels needed for the reconstructed pictures of the proposed scheme which show barely visible differences in comparison with the original sequence pictures are smaller than published works.The results of this paper can be used for DPCM coding of PAL luminance signals with the sampling frequency 10 MHz. The total bit rate for the digital transmission of PAL broadcasting TV signals (including chrominance signals, stereo sound signals and error correcting codes) is fit to PCM 3-rd hierarchy (34.368 Mbits/s).

本文提出的开关型自适应帧内DPCM图象编码的要点是:(1)由前一象素的活动函数值,预报当前象素为非活动象素或活动象索,并选用两个预测器中的某个。(2)由前一象素与其邻近象素的最小差值方向,确定预测器中需选用的4组预测系数中的某组。(3)对应非活动象素和活动象素的两个预测器,由主观实验确定各自的非线性量化器。 对四幅测试图象作的计算表明:本文提出的开关型自适应预测器之预测误差(无量化器),与典型的固定系数二维DPCM预测器相比,其直方图在e=0附近更为集中;其熵值之平均改善量为0.2比特/象素。 用三组序列图象(抽样频率10MHz),通过计算机模拟作主观实验,测定了掩盖函数,并用最小量化分层数目的准则,设计非线性量化器。主观实验结果表明:本文方案之复原图象,与原始图象相比看不出明显差别时,所需之最小量化分层数目,比已发表的工作有一定改善。 本文结果用于亮度信号(抽样频率10MHz)的DPCM编码时,则传输PAL广播电视信号(包括色度信号、双伴音及纠错码)可符合PCM三次群的要求(34.368 Mbits/s)。

The Theory of geometrical diffraction is used to analyze the effect of municipal high building structure on the radiation pattern of the 8th channel transmitting antenna of the Shanghai TV Station.And also, with the new Jing Jiang Hotel as an example, the change of the field intensities in the neighborhood of the hotel before and after the hotel being built is studied.

本文用几何绕射理论分析了高层建筑对上海电视台八频道发射天线辐射场型的影响;并以新锦江宾馆为例,计算了宾馆建造后引起的宾馆附近八频道电视信号强度的变化.

 
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