除了局部不对称特征，局部梯度特征也是图像边缘的一种重要特征。
The local gradient features are also one kind of the important features of image edges.
提出了一种基于局部梯度强度和局部熵的红外小目标融合检测的方法。
A novel method based on gradient strength and local entropy for fusion detection of weak small targets with low contrast is presented in this paper.
根据局部梯度信息对源图像的小波低频系数进行选择，获取融合图像的对应低频系数。
According to local gradient information, wavelet low frequency coefficient obtained from source image is selected to compose respective low frequency coefficient of the fused image.
由于心脏的变形和血液的流动，MRI图像中出现了弱边界、局部梯度极大值区域、伪影等现象。
Due to cardiac deformation and blood flowing, weak edges, local gradient maximum regions and artifacts are found in the MRI images.
构建了一种新的局部梯度方向直方图，同时定义了特征点的主方向，从而提出了一种具有旋转不变性的图像配准算法。
A novel gradient orientation histogram was built using a Gaussian-weighted circular window and a major orientation to each feature point was assigned based on local image properties.
文章以人体颈动脉余弦扩张为例进行分析，详细讨论了局部扩张对血管壁切应力及其梯度分布的影响。
As an example, the human carotid with local cosine form expansion was analyzed and the effects of local expansion on the distribution of wall shear stress and its gradient were discussed in detail.
根据非局部连续介质模型，提出了一维二阶剪切应变率梯度格式。
One dimensional shear strain rate gradient formation of the second order is proposed based on the non-local continuum model.
本文结合实测试验资料，分析了局部区域内温度梯度分布特点和变化规律，讨论了它们对水平角观测的影响。
With the help of observed data, this paper analyses the distribution of temperature gradient in Local areas and discusses the effect on observation horizontal angles.
提出了一种数码相机拍摄的文本图像的二值化方法，该方法是全局阈值、局部阈值与灰度梯度方法的结合。
A binarization method for digital camerabased document image was proposed. The method is a combination of the global thresholding, local thresholding and the gray gradient method.
由此证明磁记忆信号的幅度和梯度既与材料所处的整体应力有关，也与该部位的局部应力集中度有关。
The amplitude and gradient of MMMT signals not only relied on the average stress of the shell, but also relied on the local stress concentration.
现代科学技术中出现了大量复杂的非线性问题，其中大部分在局部有大梯度甚至不连续的特点。
More and more complex nonlinear problems appear in Modem Science and Technology, with large gradients or discontinues in local region.
基于梯度下降的神经网络训练算法易于陷入局部最小，从而使网络不能对输入模式进行准确分类。
Neural network BP training algorithm based on gradient descend technique may lead to entrapment in local optimum so that the network inaccurately classifies input patterns.
根据像素点的梯度方向和直线局部特性提出了一种新的亚像素直线特征检测方法。
A new method is proposed according to the pixels gradient direction and the lines local property.
考虑神经网络在训练大规模样品时易陷入局部极小，用梯度下降法与混沌优化方法相结合，使神经网络实现快速训练的同时，避免陷入局部极小。
Combining grading method with chaotic optimization, the neural network model achieves rapid training and avoids local minimum when there are a lot of samples to be trained.
我们可以假定，在空隙空间的一个数学点上液体质点的局部速度和浓度梯度之间无相关性。
We may assume that there is no correlation between the local velocity of a liquid particle at a mathematical point inside the void space and the concentration gradient.
而且矿区、矿化集中区还位于反映深部构造变异的局部重力异常区边缘、区域航磁走向中断区或梯度变化带附近。
Ore zones occur in the edge of local positive gravity anomaly, in the strike interrupted area or steep gradient area of regional aeromagnetic anomaly.
传统的模糊c -均值(FCM)聚类是一种基于梯度下降的优化算法，该方法对初始化较敏感，且易陷入局部极小。
The traditional fuzzy C-means (FCM) algorithm is an optimization algorithm based on gradient descending. it is sensitive to the initial condition and liable to be trapped in a local minimum.
本文根据海洋噪声场随机局部谱展开理论，分析了典型浅海负梯度(或负跃层)下低噪声信道的理论模型。
Based on the theory of the local spectrum of ambient-sea noise field, theoretical models of the low-noise-channel for typical shallow-water negative gradient (or thermocline) are developed.
本文对局部法作了一些改进，例如引进了由局部多轴应力状态引起的流变障碍及应力梯度的影响。
In this paper new ideas and improvements to the local approach are introduced, for instance yield locking by locally multi axial stress state and the effects of the stress gradient.
基于梯度塑性理论，研究了应变软化阶段的刚度劣化对剪切带内部的局部应变及相对剪切位移的影响。
Distributed shear strain and displacement in localized shear band were investigated considering degraded stiffness in the strain-softening process based on gradient-dependent plasticity.
建立了局部(塑性)剪切变形梯度与局部(塑性)剪切应变分布之间的关系及速度梯度与应变率分布之间的关系。
The relation between the gradient of local (plastic) shear deformation and the local (plastic) shear strain and that between the gradient of velocity and the strain rate were established.
然而基于梯度下降的BP网络存在收敛速度慢、易陷入局部极小的缺陷。
However, BP network with gradient descent has some defects such as low convergence speed, fall in local minima.
基于梯度塑性理论，考虑了应变局部化，提出单轴拉伸条件下岩样全程应力—应变曲线解析解。
Analytical solution of complete stress-strain curve of rock specimen in uniaxial tension is proposed based on gradient-dependent plasticity considering strain localization initiated at peak strength.
在零压力梯度下，这个局部的动量损失几乎是一个附加的常量，而逆压梯度则会扩大这种动量损失。
In zero pressure gradient flow, this local momentum loss is Minost an additive constant quantity. On the other hand, adverse pressure gradient results in amplification of this momentum loss.
但BP神经网络本质是梯度下降法，容易陷入局部最优。
BP neural network, as its nature of gradient descent method, is easy to fall into local optimum.
本文分析了梯度辨识算法跟踪时变系统的缺点，提出了一种新的基于局部多项式逼近的变参数梯度估计算法。
The trackability limitation of current gradient algorithm is discussed. A new algorithm, named variable parameter gradient estimation algorithm with local polynomial approximation is proposed.
采用人工神经网或梯度爬山算法均存在对优化函数形式有限制及陷入局部最优等局限性。
The approaches based on ANN or gradient hill climb algorithm have limitations such as the function form and local optimum.
采用人工神经网或梯度爬山算法均存在对优化函数形式有限制及陷入局部最优等局限性。
The approaches based on ANN or gradient hill climb algorithm have limitations such as the function form and local optimum.
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