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 local extrema 局部极值(8)
 局部极值
 However, the PSO algorithm does not search the solution space of the points closest to the extrema, which leads to the bad local extrema of the final solutions. 但是,该算法的本身特性决定了算法不趋向于搜索接近极值点的解空间,造成了PSO算法最终解的局部极值性不好; 短句来源 By seeking the local extrema of the kurtosis coefficients of a linear combination of the sampled time series, the model and the process of this algorithm were obtained. 通过寻求采样时间序列线性组合的kurtosis系数的局部极值 ,得出该算法的模型和步骤。 短句来源 By seeking the local extrema of the fourth-order cumulants (i.e. kurtosis coefficients) of a linear combination of the observed variables, the model and the process of this algorithm are obtained and then used for the experiment of blind signal separation. 通过寻求观测变量线性组合的四阶累积量(即kurtosis系数)局部极值,得出该算法的模型和步骤. 短句来源 The adaptive search technique enables local search to head for local extrema quickly. 由于应用了自适应搜索技术 ,局部搜索能够快速找到局部极值 . 短句来源 It not only overcomes the problem of local extrema, but also improves the speed and precision of registry. 克服了图像对齐过程中的局部极值问题,提高了求解速度与精度; 短句来源 更多
 “local extrema”译为未确定词的双语例句
 of multi-peak-value function; the other is to solve all local extrema of multi-peak-value function. 最后,通过对求解多峰值函数的全局最值问题和求多峰值函数的所有局部峰值的问题的结果分析比较,验证了新模型和方法的有效性。 短句来源 A sparse-to-dense matching approach is presented, which utilizes the energy map to gain sparse but high confidence disparity map, the phase matching to interpolate the disparity results and the optimization theories to avoid local extrema and detect occlusion areas. 提出一种稀疏-密集的匹配算法,利用能量图确定稀疏的视差图,然后运用相位匹配方法对视差图进行内插,并结合最优化理论克服局部最优困扰,实现遮挡检测。 短句来源 The simulation of the optimization of four Benchmark functions indicates that the simplex immune hybrid algorithm herein is better than simplex algorithm and applicable to the optimization of complicated multi-dimensional no-protruding functions with numerous local extrema. 典型函数优化Benchmark问题的仿真试验表明,提出的单纯形免疫算法比单一算法性能更优,适合于存在许多局部最优点的复杂高维非凸函数优化。 短句来源
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 Local News 本地要闻 短句来源 On Local Putonghua 略论“带地方色彩的普通话” 短句来源 The adaptive search technique enables local search to head for local extrema quickly. 由于应用了自适应搜索技术 ,局部搜索能够快速找到局部极值 . 短句来源 It not only overcomes the problem of local extrema, but also improves the speed and precision of registry. 克服了图像对齐过程中的局部极值问题,提高了求解速度与精度; 短句来源

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 local extrema
 Both the global minimizer and the local extrema are identified and the results are illustrated for particular values of the material parameters. The isoparametric values for this clipping are computed as local extrema from an analysis using Sederberg's piecewise algebraic curves. A basic requirement of scale-space representations in general is that of scale causality, which states that local extrema in the image should not be enhanced when resolution is diminished. Kinetic deformation curves based on this model are plotted that have local extrema above equilibrium values or in the negative region. An analysis of global and local extrema is presented. 更多
 In the paper(Ⅰ)we have discussed various merit functions in automa- tic design of optical thin films and reduced the problem of design to the problem of finding extrema merit function. In designing optical thin films,any merit function which is mutimodal is very complicated.It is uneffective if we use the traditional methods for finding local extrema.So we introduced a method for finding global extrema, by which we can find global extrema with certain probability. In this paper the methods... In the paper(Ⅰ)we have discussed various merit functions in automa- tic design of optical thin films and reduced the problem of design to the problem of finding extrema merit function. In designing optical thin films,any merit function which is mutimodal is very complicated.It is uneffective if we use the traditional methods for finding local extrema.So we introduced a method for finding global extrema, by which we can find global extrema with certain probability. In this paper the methods for finding global extrema are introduced, and some examples in designing optical thin films are given,thus illustra- ting the technique and efficiency of nutomatic design. 在文章[1]中我们讨论了光学薄膜自动设计中的各种评价函数,把薄膜设计问题归结为求评价函数的极值问题。光学薄膜中的各类评价函数都是十分复杂的多峰函数,不宜采用传统的求局部极值的方法,为此我们提出了一种求总极值的方法,可在一定的概率下求出总极值。本文先介绍求总极值的方法,然后给出运用此法设计光学薄膜的各类实际例子,以此说明自动设计的技巧和效果。 In this paper,a method for the detection of roof edges in range images is proposed, which is based on basic mathematical morphological operation.First by applying a morphological gradient operator,we have the roof edges contained in the valleys.Then we use the morphological valley detection operator to extract the valleys and get the peaks at the positions of roof edges.The local extrema of peaks are computed,so the corresponding roof edges are detected.The technique has been successfully applied to the... In this paper,a method for the detection of roof edges in range images is proposed, which is based on basic mathematical morphological operation.First by applying a morphological gradient operator,we have the roof edges contained in the valleys.Then we use the morphological valley detection operator to extract the valleys and get the peaks at the positions of roof edges.The local extrema of peaks are computed,so the corresponding roof edges are detected.The technique has been successfully applied to the real range images,the results show that our scheme is quick,efficient and robust. 提出了一种以基本数学形态学运算为基础的在深度图象中提取尖顶边缘的方法．首先用形态梯度算子处理深度图象，使尖顶边缘包含在图象的凹谷中．然后用形态凹谷检测算子将凹谷检测出来，并在尖顶边缘处形成凸峰．计算凸峰的局部极点，从而得到对应的尖顶边缘点的位置．用实际的深度图象进行了实验，结果证明这种方法快速有效，并且具有良好的抗噪声性能。 n this paper the synaptic couplings of artificial neural networks are viewed as a general spin variable, considering the learning of the network as an optimal problem in synapticspace. As a result, the continuous-time dynamical coupled equations of pattern space ofneural network can be extended to synaptic space. An evolution equation learning algorithm is proposed with introducing a scheme similar to the Monte Carlo method proposedby Metropolis into these equations to improve the optimization ability. With... n this paper the synaptic couplings of artificial neural networks are viewed as a general spin variable, considering the learning of the network as an optimal problem in synapticspace. As a result, the continuous-time dynamical coupled equations of pattern space ofneural network can be extended to synaptic space. An evolution equation learning algorithm is proposed with introducing a scheme similar to the Monte Carlo method proposedby Metropolis into these equations to improve the optimization ability. With this algorithm, the system can escape from the difficult of local extrema of the energy function andreach an optimal solution or its good approximations. This paper concentrate on singlelayered recurrent artificial neural networks. We use a quadric energy function in synapticcoupling space. We have studied the critical storage capacity ac of the networks whosesynaptic couplings are obtained with our algorithm. Computer simulation show that ac approximates to pseudo-inverse models when neuron number N is small and decreases slowlywith the increasing of N. 本文把人工神经网络的互连权视为广义的自旋变量，网络的学习问题看作互连权空间的优化问题．进而将通常在人工神经网络组态空间的连续时间动力学方程组推广到人工神经网络的互连权空间，并在方程组中引入类似Metropolis的MonteCarlo算法机制改进此方程组以提高寻优能力，提出了一个人工神经网络的演化方程学习算法．该算法在很大程度上摆脱了局域极值的束缚，得到了最优或接近最优的互连权．本文集中研究单层反馈人工神经网络，将互连权组态空间的能量函数取为二次函数，研究了由该学习算法得到的网络的最大存储容量ac．结果表明，当神经元数较少时，得到了接近赝逆模型的结果，并且随神经元数的增大存储容量缓慢降低． << 更多相关文摘
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