Spartina alterniflora is now listed among the world’s 100 most dangerous invasive species,severely affecting the ecological balance of coastal wetlands.Remote sensing technologies based on deep learning enable large-...Spartina alterniflora is now listed among the world’s 100 most dangerous invasive species,severely affecting the ecological balance of coastal wetlands.Remote sensing technologies based on deep learning enable large-scale monitoring of Spartina alterniflora,but they require large datasets and have poor interpretability.A new method is proposed to detect Spartina alterniflora from Sentinel-2 imagery.Firstly,to get the high canopy cover and dense community characteristics of Spartina alterniflora,multi-dimensional shallow features are extracted from the imagery.Secondly,to detect different objects from satellite imagery,index features are extracted,and the statistical features of the Gray-Level Co-occurrence Matrix(GLCM)are derived using principal component analysis.Then,ensemble learning methods,including random forest,extreme gradient boosting,and light gradient boosting machine models,are employed for image classification.Meanwhile,Recursive Feature Elimination with Cross-Validation(RFECV)is used to select the best feature subset.Finally,to enhance the interpretability of the models,the best features are utilized to classify multi-temporal images and SHapley Additive exPlanations(SHAP)is combined with these classifications to explain the model prediction process.The method is validated by using Sentinel-2 imageries and previous observations of Spartina alterniflora in Chongming Island,it is found that the model combining image texture features such as GLCM covariance can significantly improve the detection accuracy of Spartina alterniflora by about 8%compared with the model without image texture features.Through multiple model comparisons and feature selection via RFECV,the selected model and eight features demonstrated good classification accuracy when applied to data from different time periods,proving that feature reduction can effectively enhance model generalization.Additionally,visualizing model decisions using SHAP revealed that the image texture feature component_1_GLCMVariance is particularly important for identifying each land cover type.展开更多
非侵入式负荷监测(non-intrusive load monitoring,NILM)技术绿色节能,已成为电力系统负荷监测的发展趋势。集成学习方法可有效提高负荷识别性能,但其基学习器的优化选择和权重设置问题亟待解决。文中以一种典型智能电表对8种小型用电...非侵入式负荷监测(non-intrusive load monitoring,NILM)技术绿色节能,已成为电力系统负荷监测的发展趋势。集成学习方法可有效提高负荷识别性能,但其基学习器的优化选择和权重设置问题亟待解决。文中以一种典型智能电表对8种小型用电设备及其混合负荷的高频实测实验为基础,基于递归特征消除(recursive feature elimination,RFE)法选择最优特征组合,提出结合准确率和多样性权衡的基学习器组合优化方法,并引入香农熵设置投票权重,形成一种新颖的基于香农熵加权投票的集成式NILM识别方法。通过在自测数据集和公开的全球家庭和行业瞬态能量数据集(worldwide household and industry transient energy dataset,WHITED)验证,与常用集成方法比较,该方法识别准确率高、运行时间短且稳定性高。展开更多
To the Editor,We read with great interest the recent study by Islam et al [1]. The article offers a timely and robust exploration into hypertension prediction using machine learning (ML) and explainable AI tools. The ...To the Editor,We read with great interest the recent study by Islam et al [1]. The article offers a timely and robust exploration into hypertension prediction using machine learning (ML) and explainable AI tools. The combination of XGBoost and Recursive Feature Elimination (RFE), supported by interpretability methods such as SHapley Additive exPlanations (SHAP) and Local Interpretable Model-agnostic Explanations (LIME), resulted in a 91.5% accuracy and an area under the curve of 0.95, while also uncovering key predictors such as genetic pedigree coefficients and hemoglobin levels [1].展开更多
基金The National Key Research and Development Program of China under contract No.2023YFC3008204the National Natural Science Foundation of China under contract Nos 41977302 and 42476217.
文摘Spartina alterniflora is now listed among the world’s 100 most dangerous invasive species,severely affecting the ecological balance of coastal wetlands.Remote sensing technologies based on deep learning enable large-scale monitoring of Spartina alterniflora,but they require large datasets and have poor interpretability.A new method is proposed to detect Spartina alterniflora from Sentinel-2 imagery.Firstly,to get the high canopy cover and dense community characteristics of Spartina alterniflora,multi-dimensional shallow features are extracted from the imagery.Secondly,to detect different objects from satellite imagery,index features are extracted,and the statistical features of the Gray-Level Co-occurrence Matrix(GLCM)are derived using principal component analysis.Then,ensemble learning methods,including random forest,extreme gradient boosting,and light gradient boosting machine models,are employed for image classification.Meanwhile,Recursive Feature Elimination with Cross-Validation(RFECV)is used to select the best feature subset.Finally,to enhance the interpretability of the models,the best features are utilized to classify multi-temporal images and SHapley Additive exPlanations(SHAP)is combined with these classifications to explain the model prediction process.The method is validated by using Sentinel-2 imageries and previous observations of Spartina alterniflora in Chongming Island,it is found that the model combining image texture features such as GLCM covariance can significantly improve the detection accuracy of Spartina alterniflora by about 8%compared with the model without image texture features.Through multiple model comparisons and feature selection via RFECV,the selected model and eight features demonstrated good classification accuracy when applied to data from different time periods,proving that feature reduction can effectively enhance model generalization.Additionally,visualizing model decisions using SHAP revealed that the image texture feature component_1_GLCMVariance is particularly important for identifying each land cover type.
基金supported by the National Key Basic Research Program of China(2009CB118500)Scientific Research Foundation for theReturned Overseas Chinese Scholars,Ministry of Education,China(20071108-18-15)~~
文摘非侵入式负荷监测(non-intrusive load monitoring,NILM)技术绿色节能,已成为电力系统负荷监测的发展趋势。集成学习方法可有效提高负荷识别性能,但其基学习器的优化选择和权重设置问题亟待解决。文中以一种典型智能电表对8种小型用电设备及其混合负荷的高频实测实验为基础,基于递归特征消除(recursive feature elimination,RFE)法选择最优特征组合,提出结合准确率和多样性权衡的基学习器组合优化方法,并引入香农熵设置投票权重,形成一种新颖的基于香农熵加权投票的集成式NILM识别方法。通过在自测数据集和公开的全球家庭和行业瞬态能量数据集(worldwide household and industry transient energy dataset,WHITED)验证,与常用集成方法比较,该方法识别准确率高、运行时间短且稳定性高。
文摘To the Editor,We read with great interest the recent study by Islam et al [1]. The article offers a timely and robust exploration into hypertension prediction using machine learning (ML) and explainable AI tools. The combination of XGBoost and Recursive Feature Elimination (RFE), supported by interpretability methods such as SHapley Additive exPlanations (SHAP) and Local Interpretable Model-agnostic Explanations (LIME), resulted in a 91.5% accuracy and an area under the curve of 0.95, while also uncovering key predictors such as genetic pedigree coefficients and hemoglobin levels [1].
