
[數] 算法收斂;演算法收斂性
In the meantime, the mutation operator is brought in the gra***nt direction to accelerate the algorithm convergence speed.
而變異算子按照梯度方向變異,以加快算法的收斂速度。
The algorithm is deduced and difference equation of parameter error given by which the algorithm convergence is proved theoretically.
對該算法進行了推導,并給出了參數誤差的差分方程,在理論上證明了算法的收斂性。
A difficult problem to solve in GEP is analyzed that is the contradiction between algorithm convergence and population diversity and the premature phenomena.
分析了經典GEP在保持種群多樣性和全局收斂性之間的矛盾以及“早熟”現象産生的原因。
For accelerating the algorithm convergence and avoiding the local optimization, an individual learning mechanism is often applied to generic algorithm to improve algorithm performance.
在遺傳算法中引入個體學習機制能夠提高算法的性能,避免算法收斂過慢或陷入局部最優。
To improve the algorithm convergence, EM-based joint channel parameters estimation and data detection algorithm is proposed.
為進一步提高算法的收斂速度,提出聯合信道參數估計和數據檢測算法。
The crossover preserver the snippet of effective genes, and a moving window is used to fasten the algorithm convergence.
該算子通過判斷父代的城市是否相鄰來保存有效基因片斷,通過加入一個移動的窗口來加快算法收斂。
Adopt global optimum gene protect strategies and bring Adaptive mutation operator to speed up algorithm convergence;
采用全局最優基因保護策略,引入自適應變異算子,提高了算法收斂速度;
Applying new operator to mining classification rules it is found to speed up the algorithm convergence and restrain the premature convergence to some extent.
将算子應用于分類規則的挖掘中,既可提高算法的收斂速度,又能抑制早熟收斂現象的發生。
The immune memory units guarantee this algorithm rapid convergence to global optimum and the uniform crossover operator embody the idea of evolution.
算法中的免疫記憶單元确保了快速收斂于全局最優解,算法中的均勻交叉操作則體現了進化的思想。
This algorithm improves convergence speed and reduces residual error by increasing small the quantity of computation.
該算法通過增加很少的計算量不僅提高了收斂速度而且獲得更小的剩餘誤差。
It is shown that this algorithm ensures convergence to a global minimum with probability 1in a compact region of a weight vector space.
關于算法分析的定理證明了這種混合算法對于緊緻集内的權向量構成的任意連續函數能依概率1收斂于全局極小值。
The samples of rest are used for cross validating till the algorithm is convergence.
最後加入附加剩餘樣本進行交叉驗證處理,直到算法滿足收斂性準則。
A uniform structure of solving genetic algorithm premature convergence problem is proposed. A novel genetic algorithm is presented based on novel chaotic mutation model.
給出解決遺傳算法早熟收斂問題的統一框架,基于新的混沌變異模型提出一種新的遺傳算法。
And under some assumption, algorithm global convergence is guaranteed.
在一些假設條件下,算法的全局收斂性得到了保證。
The modified kernel clustering algorithm is faster than the classical algorithm in convergence and more accurate in clustering.
該聚類方法在性能上比經典聚類算法有所改進,具有更快的收斂速度以及較高的準确度。
Theoretical analysis proves that the M-PSO algorithm keeps convergence.
通過理論分析,證明算法具有良好的收斂性。
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.
采用此方法能在不傳遞任何附加信息的情況下實現視頻信號的完全重構,更好地滿足視頻壓縮中漸進傳輸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.
通過構造新的疊代格式,推出一種快速收斂的算法,這種算法適用于手算和機算。
Experiment results showed the algorithm had fast convergence rate and excellent on-line classification performance.
結果表明,該算法有較快的收斂速度,網絡的線上分類性能良好。
Compared with the result of the SOR method, the result of this algorithm shows the algorithm can accelerate convergence.
比較了該算法和用超松弛法計算的結果,表明采用該算法确實可以加快收斂速度。
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.
協方差矩陣求逆(SMI)波束形成算法利用協方差矩陣求逆的方法求得權值,其收斂速度快,但是當期望信號信噪比增加時,算法性能急劇下降。
Because of fewer coefficients updated in the new algorithm, the convergence speed increases and the computational effort decreases significantly.
新算法隻用更新一少部分的系數,因此它的收斂速度加快了,計算量大大減小了。
Variable step - size affine projection algorithm with faster convergence and lower mis - adjustment is investigated broadly.
變步長的仿射投影算法因具有較傳統仿射投影算法收斂快、失調小等優點而受到廣泛重視。
By computer simulation, the influence of the convergence coefficient in LMS algorithm on the convergence time of system is discussed.
通過對直軸中扭轉彈性波主動控制的仿真計算,讨論了LMS算法中的收斂系數對控制系統收斂時間的影響。
算法收斂性(Algorithm Convergence) 指一個疊代算法在有限步驟内,其輸出結果無限趨近于某個穩定值或最優解的性質。它是數值計算和優化領域的核心概念,決定了算法的可靠性和效率。
一、核心定義與數學本質
二、實際意義與工程價值
三、典型應用場景
權威參考來源:
- 收斂性的數學定義與分類參考《Numerical Recipes: The Art of Scientific Computing》(William H. Press et al.),第9章。
- 優化算法收斂性分析詳見《Convex Optimization》(Stephen Boyd)第9.3節。
- 機器學習中的收斂實踐見《Deep Learning》(Ian Goodfellow)第8.3節。
(注:限于版權,此處不提供直接鍊接,建議通過學術數據庫或出版社官網查詢上述書籍)
Algorithm Convergence(算法收斂性) 指算法在疊代過程中逐漸趨近于穩定狀态或預期解的能力,是衡量算法有效性和可靠性的關鍵指标。以下從概念、類型和實例三方面詳細解釋:
算法(Algorithm)
指解決特定問題的明确計算步驟或規則()。例如,排序算法、機器學習中的優化算法等。
收斂(Convergence)
在數學和計算機科學中,指一個過程逐漸逼近某個穩定值或狀态(如解或最優值)()。例如,無限級數趨近于有限極限。
結合定義
算法收斂性 表示算法經過有限次疊代後,結果不再發生顯著變化,最終穩定在預期解附近()。若算法無法收斂,可能導緻無限循環或結果偏離目标。
全局收斂(Global Convergence)
無論初始值如何,算法最終都能收斂到解()。例如,某些優化算法保證找到全局最優解。
局部收斂(Local Convergence)
僅在初始值接近解時才能收斂,可能陷入局部最優。例如,梯度下降法對初始值敏感。
收斂速度
優化算法
如梯度下降法需保證收斂到損失函數的最小值。若學習率設置不當,可能發散或震蕩()。
聚類算法
改進的核聚類算法通過調整參數,可提升收斂速度和準确性()。
遺傳算法
傳統遺傳算法存在收斂慢、隨機性強的缺點,改進後通過調整變異算子可克服這些問題()。
如需進一步了解特定算法的收斂性證明或案例,可參考數學優化或數值分析領域的文獻。
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