
[数] 算法收敛;演算法收敛性
In the meantime, the mutation operator is brought in the gra***nt direction to accelerate the algorithm convergence speed.
而变异算子按照梯度方向变异,以加快算法的收敛速度。
The algorithm is deduced and difference equation of parameter error given by which the algorithm convergence is proved theoretically.
对该算法进行了推导,并给出了参数误差的差分方程,在理论上证明了算法的收敛性。
A difficult problem to solve in GEP is analyzed that is the contradiction between algorithm convergence and population diversity and the premature phenomena.
分析了经典GEP在保持种群多样性和全局收敛性之间的矛盾以及“早熟”现象产生的原因。
For accelerating the algorithm convergence and avoiding the local optimization, an individual learning mechanism is often applied to generic algorithm to improve algorithm performance.
在遗传算法中引入个体学习机制能够提高算法的性能,避免算法收敛过慢或陷入局部最优。
To improve the algorithm convergence, EM-based joint channel parameters estimation and data detection algorithm is proposed.
为进一步提高算法的收敛速度,提出联合信道参数估计和数据检测算法。
The crossover preserver the snippet of effective genes, and a moving window is used to fasten the algorithm convergence.
该算子通过判断父代的城市是否相邻来保存有效基因片断,通过加入一个移动的窗口来加快算法收敛。
Adopt global optimum gene protect strategies and bring Adaptive mutation operator to speed up algorithm convergence;
采用全局最优基因保护策略,引入自适应变异算子,提高了算法收敛速度;
Applying new operator to mining classification rules it is found to speed up the algorithm convergence and restrain the premature convergence to some extent.
将算子应用于分类规则的挖掘中,既可提高算法的收敛速度,又能抑制早熟收敛现象的发生。
The immune memory units guarantee this algorithm rapid convergence to global optimum and the uniform crossover operator embody the idea of evolution.
算法中的免疫记忆单元确保了快速收敛于全局最优解,算法中的均匀交叉操作则体现了进化的思想。
This algorithm improves convergence speed and reduces residual error by increasing small the quantity of computation.
该算法通过增加很少的计算量不仅提高了收敛速度而且获得更小的剩余误差。
It is shown that this algorithm ensures convergence to a global minimum with probability 1in a compact region of a weight vector space.
关于算法分析的定理证明了这种混合算法对于紧致集内的权向量构成的任意连续函数能依概率1收敛于全局极小值。
The samples of rest are used for cross validating till the algorithm is convergence.
最后加入附加剩余样本进行交叉验证处理,直到算法满足收敛性准则。
A uniform structure of solving genetic algorithm premature convergence problem is proposed. A novel genetic algorithm is presented based on novel chaotic mutation model.
给出解决遗传算法早熟收敛问题的统一框架,基于新的混沌变异模型提出一种新的遗传算法。
And under some assumption, algorithm global convergence is guaranteed.
在一些假设条件下,算法的全局收敛性得到了保证。
The modified kernel clustering algorithm is faster than the classical algorithm in convergence and more accurate in clustering.
该聚类方法在性能上比经典聚类算法有所改进,具有更快的收敛速度以及较高的准确度。
Theoretical analysis proves that the M-PSO algorithm keeps convergence.
通过理论分析,证明算法具有良好的收敛性。
In the algorithm the convergence speed is larger than the homologous algorithm. The schemes do not require any additional information enough to achieve perfect reconstruction.
采用此方法能在不传递任何附加信息的情况下实现视频信号的完全重构,更好地满足视频压缩中渐进传输及多分辨率分析的要求。
A quick convergence algorithm was advanced by constructing a new iterative format, which applies to manual and machinery computation.
通过构造新的迭代格式,推出一种快速收敛的算法,这种算法适用于手算和机算。
Experiment results showed the algorithm had fast convergence rate and excellent on-line classification performance.
结果表明,该算法有较快的收敛速度,网络的在线分类性能良好。
Compared with the result of the SOR method, the result of this algorithm shows the algorithm can accelerate convergence.
比较了该算法和用超松弛法计算的结果,表明采用该算法确实可以加快收敛速度。
The SMI algorithm has fast convergence rate and obtains the weight vector via the inverse of covariance matrix, but its performance will drop suddenly when the SNR for desire signal is high.
协方差矩阵求逆(SMI)波束形成算法利用协方差矩阵求逆的方法求得权值,其收敛速度快,但是当期望信号信噪比增加时,算法性能急剧下降。
Because of fewer coefficients updated in the new algorithm, the convergence speed increases and the computational effort decreases significantly.
新算法只用更新一少部分的系数,因此它的收敛速度加快了,计算量大大减小了。
Variable step - size affine projection algorithm with faster convergence and lower mis - adjustment is investigated broadly.
变步长的仿射投影算法因具有较传统仿射投影算法收敛快、失调小等优点而受到广泛重视。
By computer simulation, the influence of the convergence coefficient in LMS algorithm on the convergence time of system is discussed.
通过对直轴中扭转弹性波主动控制的仿真计算,讨论了LMS算法中的收敛系数对控制系统收敛时间的影响。
算法收敛性(Algorithm Convergence) 指一个迭代算法在有限步骤内,其输出结果无限趋近于某个稳定值或最优解的性质。它是数值计算和优化领域的核心概念,决定了算法的可靠性和效率。
一、核心定义与数学本质
二、实际意义与工程价值
三、典型应用场景
权威参考来源:
- 收敛性的数学定义与分类参考《Numerical Recipes: The Art of Scientific Computing》(William H. Press et al.),第9章。
- 优化算法收敛性分析详见《Convex Optimization》(Stephen Boyd)第9.3节。
- 机器学习中的收敛实践见《Deep Learning》(Ian Goodfellow)第8.3节。
(注:限于版权,此处不提供直接链接,建议通过学术数据库或出版社官网查询上述书籍)
Algorithm Convergence(算法收敛性) 指算法在迭代过程中逐渐趋近于稳定状态或预期解的能力,是衡量算法有效性和可靠性的关键指标。以下从概念、类型和实例三方面详细解释:
算法(Algorithm)
指解决特定问题的明确计算步骤或规则()。例如,排序算法、机器学习中的优化算法等。
收敛(Convergence)
在数学和计算机科学中,指一个过程逐渐逼近某个稳定值或状态(如解或最优值)()。例如,无限级数趋近于有限极限。
结合定义
算法收敛性 表示算法经过有限次迭代后,结果不再发生显著变化,最终稳定在预期解附近()。若算法无法收敛,可能导致无限循环或结果偏离目标。
全局收敛(Global Convergence)
无论初始值如何,算法最终都能收敛到解()。例如,某些优化算法保证找到全局最优解。
局部收敛(Local Convergence)
仅在初始值接近解时才能收敛,可能陷入局部最优。例如,梯度下降法对初始值敏感。
收敛速度
优化算法
如梯度下降法需保证收敛到损失函数的最小值。若学习率设置不当,可能发散或震荡()。
聚类算法
改进的核聚类算法通过调整参数,可提升收敛速度和准确性()。
遗传算法
传统遗传算法存在收敛慢、随机性强的缺点,改进后通过调整变异算子可克服这些问题()。
如需进一步了解特定算法的收敛性证明或案例,可参考数学优化或数值分析领域的文献。
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