摘要
水下目标识别中训练样本集含有冗余样本、噪声样本及无关样本,且特征提取、特征选择和决策系统设计过程分离而导致系统识别性能的下降,为此提出了基于加权最近邻收缩样本选择的SVM集成算法(SVME-WRNN)和基于加权免疫克隆样本选择的SVM集成算法(SVME-WICISA)。这2种集成方法通过样本选择来构建精度高、差异大的子分类器,并将其集成。利用4类水下目标实测数据进行了分类仿真实验。实验结果表明:SVME-WRNN算法和SVME-WICISA算法与SVME算法(无样本选择)相比较,在识别率相当的情况下,大幅度地降低了训练样本数目,得到的综合分类器具有良好的分类精度。
Because the training instance set for recognizing underwater acoustic targets contains many noise sam-ples, redundant samples and irrelevant samples, and because the systems for feature extraction, feature selection and decision making are designed separately, the underwater acoustic target recognition performance declines. Hence we propose the SVM ensemble based on weighted reduced nearest neighbor （ SVME-WRNN） and the SVM ensemble based on weighted immune clone instance selection algorithm（SVME-WICISA）. The ensembles use in-stance selection to build precise and diverse sub-classifiers and then combine them. We simulate the classification of the measurement data of four types of underwater acoustic targets. The simulation results, given in Figs.3, 4 and 5 and Table 3, and their analysis show preliminarily that, compared with the SVME without instance selection, the two ensembles can greatly reduce the number of training instances when their classification accuracy is almost the same and that the combined classifier has satisfactory classification accuracy.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2014年第3期362-367,共6页
Journal of Northwestern Polytechnical University
基金
国家自然科学基金(60672136)
水下测控技术重点实验室基金(9140C260505120C26104)资助
关键词
噪声
算法
决策
特征提取
支持向量机
水声学
样本选择
目标识别
加权免疫克隆样本选择算法
加权最近邻收缩
acoustic noise, algorithms, decisionacoustics
instance selection, targetweighted reduced nearest neighbormaking, feature extraction,support vector machines,recognition, weighted immune clone instance selectionunderwateralgorithm,
