查询词典 absolute extremum

In the early stage of the genetic algorithms, the three genetic mechanisms are used both in integer part and decimal part, so that the genetic algorithms have stronger global search ability, keep the population diversity efficiently and avoid falling into local extremum. In the later stage of the genetic algorithms, the three genetic operators are used in decimal part, so the genetic algorithms have stronger local search ability and fast convergence ability.

在遗传算法开始阶段，该编码算子进行整数部分和小数部分的遗传操作，使得遗传算法在早期具有很强的全局搜索能力，避免陷人局部极值；在后期进行小数部分的遗传操作，使得遗传在后期具有很强的局部搜索能力，能够很快地搜索到全局极值。

A fault feature extraction approach based on extremum field mean mode decomposition and singular value entropy of auto-regressive model is proposed.

提出了一种基于EMMD（extremum field mean mode decomposition）和AR（auto-regressive）奇异值熵的故障特征提取方法。

In this paper, a new edge detection method——method using extremum of first directional derivative is proposed, based upon a general gradient edge model.

文中通过傅里叶变换，在频率域，通过求垂直于边缘的一阶方向导数，并检测其极值点来确定边缘。

Edge detection ; first directional derivative ; extremum ; Fourier transform

边缘检测；一阶方向导数；极值；傅里叶变换

Edge lines are extracted automatically from image, by acquiring points of extremum of first directional derivative vertical with edge line with Fourier transform in frequency domain.

同时，参考一阶方向导数的数值来排除一些非边缘点（一阶方向导数的数值为常数者，零也为常数）。

Since the B-spline is a locally supported function, the smoothing formula can be strictly limited in a neighborhood of each point. The smoothing surface defined by the smoothing formula has the same convexity as that of the original image. Secondly, the edge points are detected by either computing the local extremum points of the directional derivative or computing zero-crossing of the second-order directional derivative of the smoothing surface. Finally, an example of an edge detector is given.

针对反卷积视觉模型的病态性，增加了适当的约束，给出了基于低松弛迭代格式的快速自适应滤波算法，对于一个N×N输入图象，由于变换核的局部支撑性质以及低松弛迭代格式的引入，使得快速自适应滤波算法的计算复杂度降为象素个数N〓的线性量阶N〓，就最小二乘算法的复杂性而言，优于不动点迭代算法的O以及基于FFT的预处理共轭梯度算法的O。

Corresponding chaotic evolution operators and chaotic population embedding operator are designed, and the species conservation strategy based on chaotic basin of attraction is proposed to treat with asymmetric distribution of extremum and to find all or near all minima.

设计了相应的混沌进化算子以及混沌群体嵌入算子，提出了基于混沌吸引域概念的种群保护策略，适应了极值点分布不均匀的情况，达到求解全部／大部分极小点的目的。

It is proposed in this paper that an exponential gamma distribution be used as the theoretical model for the flood extremum distribution.

本文提出用指数Г分布作为洪水极值分布的理论模型。

The results of backwater calculation at Changzhou Reservoir demonstrated that, there exited an extremal value of backwater length while the water level was 18.6m and the criterion for the terminal of backwater was 0.1m. The phenomenon of extremum exiting will be unobvious if the criterion was 0.2m or 0.3m.

长洲枢纽回水计算结果表明：当水库在18.6m水位运行，末端判别标准取0.1m时，其回水长度随流量变化存在极值现象；但末端标准取0.2m与0.3m时，极值现象不明显。

By the alternative theorem, the optimality conditions of vector extremum problems with generalized inequality constraint are established in linear space.

在线性空间中，定义了广义次似凸映射的概念，并讨论了它的一些性质，建立了此映射的择一定理。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。