特征方向

词组短语

characteristic direction

与特征方向相关的网络例句 [注：此内容来源于网络，仅供参考]

The new method is a combination of characteristic approximation to handle the convection part, to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion, a smaller time truncation is gained at the same time, and a mixed finite elementspatial approximation to deal with the diffusion part, the sealer unknown and the adjoint vector function are approximated optimally and simultaneously.

此方法即为对方程的对流项沿流体流动的方向即特征方向进行离散，从而保证格式在流动锋线前沿逼近的高稳定性，消除了数值弥散现象，并得到了较小的时间截断误差；另一方面，对方程的扩散项采用混合元离散，可同时高精度逼近未知函数及其伴随向量函数，理论分析表明，此方法是稳定的，具有最优的L~2逼近精度。

The characteristic approximation is used to handle the convection part along the direc-tion of fluid namely characteristic direction to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion; The mixed finite element spatial approximation is employed to deal with diffusion part and approximate the scalar unknown and the adjoint vector function optimally and simultaneously; In order to preserve the integral conservation of the method, we introduce the modified characteristic method.

该方法对方程的对流部分沿流体流动的方向即特征方向离散以保证格式在流动的锋线前沿逼近的高稳定性，消除数值弥散现象；对方程的扩散部分采用最低次混合有限元方法离散、同时以高精度逼近未知函数及未知函数的梯度；为保证方法的整体守恒性，在格式中引入修正项。

A new anisotropic diffusion filtering method which is based on this framework is proposed in this paper.

所以，基于图像特征方向建立的各向异性扩散滤波方法更能达到我们预期的效果，该设计方法是有效的。

Douglas and Russell first presented the idea of characteristics in[13],in whichthe diffusion term is included in the derivative of characteristic direction of the solu-tion and the backward difference quotient along the time axis was replaced by it alongcharacteristic direction.

Douglas，Russell[13]最先提出了特征法的思想，其主要特点是将模型方程的对流项隐含在解沿特征方向的导数之中，以沿特征方向的向后差商逼近取代通常方法中沿时间方向的向后差商逼近。

These algorithms firstly get the characteristic of line from the normal part, and then track the line under the guidance of the characteristic direction, so that it can track through intersection or overlapping parts to recognize an entire line in one step.

这些方法在线条的无干扰部分搜索其特征，然后在特征方向的指导下进行跟踪，可以避免线条上相交、粘连部分的干扰，完整地识别线条。

For the bottom-up attention process, areas of interest that deserve visual attention are formed by a sequentially extracting of feature map, conspicuity map, and interesting map. Firstly, based on Treisman's feature integration theory and the characteristics of orientation and frequency selective nerve cells in biological cortex, we propose a new 2D optimal quadrature filter in the meaning of minimum energy loss to extract intensity, edge, orientation, symmetry, curvature and comer features to form the feature maps. Then based on the local competent and global cooperative perception character of biological vision, we design a kind of competent/cooperative filter and use a set of such filters to extract conspicuous locations that will most likely to cause visual attention from feature maps to form conspicuity maps.

我们根据Treisman〓的特征整合理论，结合生物视觉皮层的方向、频率敏感性神经元，提出采用一组调制在不同尺度和方向上的新的最佳正交特征滤波器并行地提取图象的亮度、边缘、方向、对称性、曲率和角度等特征作为注意线索，构成特征图；在此基础上，基于生物视觉的局部竞争和全局协作特性，本文设计了一种竞争协作滤波器用于从特征图中提取可能引起视觉注意的显著位置构成显著图，各显著图进一步通过本文提出的融合算法和非线性松弛迭代算法生成自底向上兴趣图。

A set of complex Morlet wavelet are applied on projection slice of each direction to decompose each projection into several frequency channels,the average and variance extracted are computed in each frequency channel,and then linear regression model is employed to computer realationship feature between frequency channels.1-D DFT is applied to features and the amplitudes of Fourier coefficient are selected as features,then the extracted features are rotation invariant.

该算法是将一定大小的图像进行二维傅里叶变换；其次在变换后的图像中央选择一个圆盘区域，并在方向［0°，180°］内进行等间隔角度频率抽样，实现方向分解，使用一组复Morlet小波对每个方向上的映射切片进行小波变换，从而实现多通道频率分解；在各个频率通道中计算均值和方差作为特征，并利用线性回归模型计算频率通道之间的关系特征；将特征沿方向进行一维傅里叶变换并取其幅值，从而得到旋转不变性特征。

First, the proposed scheme uses contourlet transform to extract multidirectional and multiscale texture information, and then obtains the feature points invariant to the affine transformation from the low and middle directional subbands by Harris-Affine detector. Second, the feature regions are adaptively computed by the feature scale of the local structure and normalized by U transform. The watermarking is embedded adaptively in those characteristic regions which are normalized. Finally, by vector quantization, several copies of the watermark are embedded into the no overlapped local feature regions in different directional subbands.

首先，用Contourlet变换提取出多尺度、多方向的纹理信息；再用Harris-Affine检测算子从变换域的中、低频方向子带中提取出仿射不变特征点，结合自适应局部结构的特征尺度确定特征区域，并用U变换对其归一化处理，水印就自适应地嵌入到归一化后的区域中；水印嵌入采纳矢量量化的策略，将水印信息重复嵌入到不同方向子带、多个不相交的局部仿射不变特征区域。

In order to describe quantitatively their relative contributions, the kinematic vorticity number is introduced and simply defined as cos v, where v is the angle between two eigenvectors containing the shear directions in the principal deformation plane （XZ-plane or ac-plane）.

为了定量说明两者间的相对贡献，提出了运动学涡度这一物理量，并简单地定义为COSv.v是主变形面内两特征方向间的夹角。

Based on the Roe′s approximate Riemann solver, this paper presents the flux balance Godunov scheme for the shallow water equation with source terms.

以Roe的近似Riemann解为基础，将源项按特征方向进行特征分解，建立了带源项浅水方程的通量平衡Go dunov求解格式。

与特征方向相关的网络解释 [注：此内容来源于网络，仅供参考]

characteristic direction：特征方向

characteristic dimension 特征尺寸 | characteristic direction 特征方向 | characteristic element 特征要素

characteristic set：特征集合

特征方向|characteristic direction | 特征集合|characteristic set | 特征角面|characteristic conoid

concomitant strabismus：共同性斜视

共同性斜视(concomitant strabismus)是指眼外肌和所支配神经均无器质性病变,向各注视方向注视时斜视角度相同的一种眼位偏斜. 主要特征是无明显临床症状,眼球运动正常,向各方位注视时斜视角度不变,左右眼分别注视斜视角相差不超过5度(8.5△),

DD：日期

本发明涉及优化至少一个WCDMA类型移动电话网络(RT)的容量以建立数据流主要在下行链路方向的至少一个附加业务(MBMS)的方法,该方法的特征在于它包括下面的步骤:-对至少一个网络(RT)的计划部署日期(DD),建立(10)表示网络(RT)覆盖预测和使用业务所需功率的至少一个计划业务量图(CT);

Knowledge Discovery：知识挖掘

基于内容的视频信号(Video)与图像库检索是当前计算机视觉,图像数据库与知识挖掘(Knowledge Discovery)等领域研究的热点之一.较系统地介绍了该研究方向的现状.对于静态图像,介绍了基于颜色、纹理、形状、区域、目标特征的检索和交互式检索方法,

gauging：测量

几何尺寸测量(Gauging) 传统的测量方法多是接触型的测量方法,不仅效率低而且容易损伤被测物. 伴随视觉技术和激光技术的发展,基于现代视觉技术的几何特征测量已成为高速生产系统中快速、准确、全面的对产品几何尺寸控制的新方向.

gyromagnetic ratio：磁旋比

此频率与外部磁场的强度和所谓磁旋比(gyromagnetic ratio)成比例,后者是元素或其同位素的特征. 拉莫尔频率在射频的一定范围内(对于不同的同位素,在1T的外部磁场中为2~50MHz),使磁化进动方向垂直于外部磁场的EM辐射脉冲称为90oRF激励脉冲(图9-11).

one-sided：单侧

指定拖动方向:"单侧"(One Sided) 或"双侧"(Two Sided). 选取方向与其垂直的平面. 出现"方向"(DIRECTION) 菜单. 要选取创建特征的方向,可单击"确定"(Okay) 接受缺省方向,或者单击"反向"(Flip) 反转方向. 单击"参照"(References) 标签.

stripe：条

图1给出了单一存储总线对应的数据存储系统的几种类型,这几个例子有一个共同的特征,那就是RAID校验完全是在一条总线上的多个磁盘间进行,RAID数据分条(Stripe)的存储方向和总线的方向平行,由于单一总线上容纳的设备数量有限,因此,

woof：纬线

总特征,基本上具有纬线(woof)方向的带状分布特征层状分布的原因,大洋表层以下的海水都是从此海区表层辐聚(convergence)下沉而来的. 表层很小,变幅通常小于0.05. 下层,受内波(internal wave)的影响,常有大于表层的.