A cost-sensitive bayesian tobacco grade identification system under unbalanced data

By constructing a cost-sensitive Bayesian tobacco grade identification system under imbalanced data, the problems of low identification rate of high-value tobacco leaves, high economic cost of misclassification, and lack of model interpretability in tobacco grade classification are solved. It achieves accurate identification of high-value tobacco leaves and minimizes economic costs, and provides transparency and traceability in decision-making.

CN122413136APending Publication Date: 2026-07-17KUNMING UNIV OF SCI & TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Filing Date
2026-04-28
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies for grading tobacco leaves suffer from problems such as low recognition rate of high-value tobacco leaves, high economic cost of misclassification, lack of model interpretability, and poor adaptability of Bayesian networks. In particular, it is difficult to achieve accurate recognition and minimize economic costs under imbalanced data.

Method used

By employing multi-level integrated resampling, cost-sensitive Bayesian network learning, and probabilistic inference techniques, a cost-sensitive Bayesian tobacco grade identification system under imbalanced data is constructed. This system includes data preprocessing, multi-level integrated resampling, cost-sensitive Bayesian network learning, inference prediction, and evaluation modules, enabling accurate identification of high-value tobacco leaves and transparent and traceable decision-making.

Benefits of technology

It improves the identification accuracy and recall rate of high-value tobacco leaves, reduces the economic losses from misclassification, provides interpretability and traceability of the model, adapts to the asymmetric cost of misclassification, and significantly outperforms the traditional model.

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Abstract

本发明公开了一种不平衡数据下代价敏感贝叶斯烟叶档次识别系统,涉及烟草质量分级、机器学习与不平衡数据分类技术领域,旨在解决现有烟叶分级方法中高价值样本识别率低、误分类经济代价高、模型无解释性、贝叶斯网络适配性差的问题。该系统由数据采集与预处理模块、多层次集成重采样模块、代价敏感贝叶斯网络学习模块、推理预测与评估模块、可视化与报告模块构成,各模块协同工作,实现从原始数据到分级结果、报告生成的全流程自动化处理。本发明通过自适应离散化处理标准化烟叶29维特征数据,采用多层次集成重采样扩充高价值少数类样本,构建非对称误分类代价矩阵,结合增强爬山算法与拉普拉斯平滑优化贝叶斯网络,实现高价值烟叶精准识别、决策可追溯与误分类代价最小化。实验验证表明,高价值类样本精确率与召回率均达100%,整体准确率82.47%,宏F1达0.86,性能优于传统机器学习模型,可直接对接烟草企业生产分级系统,具有极强的工业落地性与推广价值。
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