local extremum meaning in Chinese
局部极值
Examples
- The bp neural network has the ability to solve many practical problems because of its strong mapping . however , it has slow convergence rate and is prone to fall into local extremum
Bp神经网络具有很强的映射能力,可以解决许多实际问题,但同时还存在着收敛速度慢,易陷于局部极小的缺点。 - In the course of searching the optimum solution , it can accept a value make objective function good , but also a bad one . in this way it will avoid falling into a local extremum and get a global optimum value
而且在搜索的过程中，不仅接受使目标函数变好的解，而且还能以一定的概率接受坏解，这样将尽量避免陷入局部极值解而达到全局最优解。 - Aimed at the ga ' s disadvantages : weak local optimization , easiness of falling into local extremum , this thesis presents an improved ga which introduces two operators " local search " and " adaptively avoid entropy decreasing "
针对遗传算法局部搜索能力差及容易陷入局部极值点的缺陷，提出一种改进的遗传算法，引入了“局部搜索?均值方差阀值”和“自适应防止熵减”两个算子。 - Many experiments are implemented , the results of which demonstrate the algorithm ’ s efficiency and stability . it overcomes disadvantages of the bp neural network which has slow convergence rate and is prone to fall into local extremum
仿真和实验结果充分表明了该算法的有效性和稳定性,克服了bp神经网络收敛速度慢和易陷入局部极小的问题,为混沌时间序列预测运用开辟了新的应用领域。 - By whitening the covariance matrix of flat ambiguity , correlation between ambiguity components , the number of local extrema of cost function is reduced . the search program getting into precocity is avoided by suitable encoding and genetic operation
通过白化处理模糊度，减少模糊度搜索中指标函数的局部极值点，采用适当的编码和遗传操作使得在种群个体较少的情况下避免搜索陷入早熟。