Study on local extremum of object function in mutual information-based image registration;
基于互信息图像配准中的局部极值问题研究
The difficulty of optimization caused by local extremum is the key problem of the algorithm.
由局部极值导致的寻优困难是困扰该算法的核心问题,混合优化算法成功地解决了互信息函数的寻优问题,但延长了配准时间。
It can not only overcome the disadvantage of easily getting into the local extremum in the later evolution period,but also keep the rapidity of the previous period.
所提出的算法将粒子群优化算法和混沌算法相结合,既摆脱了算法搜索后期易陷入局部极值点的缺点,同时又保持了前期搜索的快速性。
Overcome of local maximum in mutual information-based image registration;
基于互信息量图像配准中目标函数局部极值的克服
The cause of local maximum of object functions image registration was analyzed based on mutual information, and an optimization strategy by using simulated annealing-simplex method proposed.
分析了在基于互信息方法的图像配准中,目标函数产生局部极值的原因,提出以模拟退火单纯形法作为优化策略,该方法利用了单纯形法的一种修改后的形式作为模拟退火中随机变化的发生器。
That means local extrema of histograms are sensitive to ±1 embedding method.
这意味着图像直方图及其小波直方图的局部极值对嵌入方法比较敏感。
Taking a SEM image of the machined surface as an example, its edge can be extracted by using the local maximum of wavelet s coefficients, and thus the characteristics of a machined surface can be achieved.
图像边缘是图像的重要特征 ,提出了一种基于小波变换的图像多尺度边缘检测算法 ,并以机加工表面SEM图像为对象 ,利用小波系数局部极大值提取其边缘 ,实现机加工表面纹理特征提取。
The problem of trapping into the local minimum is solved, which is inherent with the learning algorithms-based on the BP principle by weight strategy.
但是BP网络极容易陷入局部极小值,应用加权策略解决了此问题。
On the other hand, the method in this paper can avoid the local minimum efficiently by adding the number of the particles.
并将仿真结果与BP网络进行比较,仿真数据表明,PSO算法在叠代次数、函数逼近误差、网络性能方面均比BP网络有着显著的提高,且在粒子数目较大的情况下能有效避免BP网络无法避免的局部极小值问题。
Analysis of the traditional artificial potential field failed in path planning due to the local minimum and the possible local minimum area of the external obstacles on the geometry.
本文分析了传统的人工势场法由于局部最小问题而导致规划失败的原因,对可能产生局部极小值区域的障碍物外部几何形状进行分析。
The targets are separated off from searching for local maximum, determining threshold and combining with the correlation of image frames.
搜索局部极大值,确定阈值并结合图像帧间的相关性分离出目标。
Therefore, an algorithm of PD signal reconstruction based on modulus maximum wavelet domain is presented in this paper.
为此,该文提出一种基于模极大值小波域的局部放电信号重构算法。
Local and Global Almost Sure Central Limit Theorems on Extremes;
极值的局部及整体几乎处处中心极限定理
A stationary point which is neither a local maximum nor a local minimum point is called a saddle point.
一个既不是局部极大点又不是局部极小点的平稳点称为一个鞍点。
A remark of locally symmetric extremal Hermitian metric
关于局部对称极值度量的一个注记(英文)
AN EXTREME MINIMUM FIXED POINT THEOREM FOR SET-VALUED MAPPING IN THE LOCAL CONVEX SPACE
局部凸空间中集值映射的一个极小不动点定理
A maximum or minimum value of a function.
极大值，极小值函数的最大值或最小值
Local Pressure to Enlarge the Photography of the Value of Breast Disease;
局部加压放大摄影对乳腺疾病诊断的价值
Local Search Algorithm for Solving Maximizing Submodular Set Function;
求解下模集函数最大值问题的局部搜索算法
By translating a geometric constraint problem into an optimization problem, the global optimum of a multi-variation function was sought for and the local traps were ignored by using chaos method in the algorithm.
将约束求解问题转化为优化问题,并对多变量函数求全局极值,用混沌算法跳过局部搜索陷阱.
Maximum Loading, Velocity, and PV Values for select kit materials.
所选部件材料的最大载荷、度和极限PV值。
The Decision on the Minimal Covering of Precomplete Classes in Partial Multiple-valued Logic;
部分多值逻辑中极大封闭集之最小覆盖的判定
minimax regret critical value
极小极大后悔临界值
a sudden local flood of great volume and short duration.
一个突然的有极大流量和较短持续时间的局部洪水。
Boundedness of Spherical Local Maximal Operator for Radial Functions in the Plane;
球面局部极大算子在二维向径函数空间上的有界性
Research on Local Lagrangian Numerical Differentiation;
局部Lagrange数值微分法研究
Plane 2D Numerical Simulation on Flow Field and the Max Equilibrium Scour at Abutments;
桥台局部流场及最大平衡冲刷的平面二维数值模拟
Asymptotic Distribution of Maxima and Point Process of Locally Stationary Gaussian Process;
局部平稳高斯过程的最大值与点过程的渐近分布