系统优化基于 SVM 的微波冲程分类的训练和设置:10 端口系统的数值模拟

IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Tomas Pokorny;David Vrba;Ondrej Fiser;Marco Salucci;Jan Vrba
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引用次数: 0

摘要

本研究的主要目的是系统地评估支持向量机(SVM)算法的性能,为微波脑中风分类确定最佳配置以及训练和测试数据的适当参数。利用经过实验验证的三维数字模型,创建了一个具有不同数据变化水平的大型合成训练和测试数据数据库。在这些模型中,不同大小、类型和介电参数的脑卒中被虚拟地插入天线平面内大脑的不同位置。为了研究减少训练数据、数据维度、数据格式和算法设置的影响,我们生成了合成数据集。研究结果证实,主成分分析(PCA)降维显著提高了 SVM 算法的分类准确性,而脑卒中较小的受试者数据集似乎最适合用于训练。此外,包含透射和反射系数实部和虚部的数据集分类准确率最高。对于目前的天线阵列、最佳观察设置以及训练和测试数据变异性较高的场景,接近真实的临床场景,准确分类缺血性脑卒中并建议安全启动血栓治疗的能力约为 70%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Systematic Optimization of Training and Setting of SVM-Based Microwave Stroke Classification: Numerical Simulations for 10 Port System
The primary objective of this study is to systematically evaluate the performance of the Support Vector Machine (SVM) algorithm, identifying optimal configurations and appropriate parameters for training and testing data, for microwave brain stroke classification. Using experimentally verified 3D numerical models, a large database of synthetic training and test data has been created with different levels of data variability. These models consist of an antenna array surrounding reconfigurable geometrically and dielectrically realistic human head models Within these models, strokes of varying sizes, types, and dielectric parameters are virtually inserted at different positions in brain within the plane of the antennas. Synthetic data sets have been generated to study the impact of reducing training data, data dimensionality, data format, and algorithm settings. The results of this study confirm that Principal Component Analysis (PCA) dimensionality reduction significantly improved the classification accuracy of the SVM algorithm, and datasets of subjects with smaller strokes appeared to be the most suitable for training. Furthermore, datasets that contain the real and imaginary parts of transmission and reflection coefficients result in the highest classification accuracy. For the current antenna array, the best observed setting and scenarios with high variability in training and test data, close to real clinical scenarios, the ability to accurately classify ischemic strokes and suggest safe initiation of thrombotic therapy is approximately 70%.
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来源期刊
CiteScore
5.80
自引率
9.40%
发文量
58
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