选矿过程精矿品位自适应在线支持向量预测方法

Adaptive online support vector regression prediction model for concentrate grade of the ore-dressing processes

中文关键词  自适应参数  在线预测  混合核函数  支持向量机  精矿品位

英文关键词  adaptive parameters  online prediction  mixture kernel  support vector regression  concentrate grade

中文摘要

      本文提出了一种基于支持向量回归的选矿过程精矿品位自适应在线预测方法, 通过使用新的混合核函数 和参数在线更新机制提高了精矿品位的预测精度. 在分析经典核函数特性后, 构造了一种混合核函数以兼顾模型的 学习能力与泛化能力, 同时为了提高预测方法对选矿生产动态过程的适应性, 模型依据新工况样本对现有样本集统 计特性的影响, 引入了模型参数自适应调整机制, 并采用在线迭代学习机制更新模型, 提高了模型的计算速度. 使用 某选矿厂生产实际数据进行实验分析, 结果表明本文方法比现有方法在计算时间和预测精度上都有明显优势, 适合 应用于动态变化的选矿生产过程.

英文摘要

      An online prediction approach is proposed for concentrate grade of ore-dressing processes based on support vector regression (SVR). The algorithm combines a new mixture kernel function and an updating technique for adaptive online parameters. In this context, different type of kernel functions is analyzed, and a new mixed kernel is developed to reach a compromise between learning capability and generalization. Furthermore, to improve the adaptability, an adaptive parameter scheme for online updating is introduced to match the changing process conditions, which considers that each new sample can change statistic properties of the training data set. Experiment results demonstrate its higher accuracy and faster computation speed than existing methods, which suggests that it is appropriate to be applied to dynamic ore-dressing production processes.