Background Brain stroke is a serious health issue that requires timely and accurate prediction for effective treatment and prevention.This study described a hybrid system that used the best feature selection method an...Background Brain stroke is a serious health issue that requires timely and accurate prediction for effective treatment and prevention.This study described a hybrid system that used the best feature selection method and classifier to predict brain stroke.Methods The Stroke Prediction Dataset from Kaggle was used for this study.Synthetic minority over-sampling technique(SMOTE)analysis was used to accomplish class balancing.Accuracy,sensitivity,specificity,precision,and the F-Measure were the main performance parameters considered for investigation.To determine the best combination for predicting brain stroke,the performance of five classifiers,Naïve Bayes(NB),support vector machine(SVM),random forest(RF),adaptive boosting(Adaboost),and extreme gradient boosting(XGBoost),was compared along with three feature selection techniques,mutual information(MI),Pearson correlation(PC),and feature importance(FI).The performance parameters were assessed using k-fold cross-validation.Results The hybrid system proposed in this study identified a reduced set of features that were able to effectively predict brain stroke.FI provided a feature reduction ratio of 36.3%.The most successful hybrid system for predicting brain stroke used FI as the feature selection technique and RF as the classifier,achieving an accuracy of 97.17%.Conclusion The proposed system predicted brain stroke with high accuracy.These findings could be used to inform the early detection and prevention of brain stroke,allowing healthcare professionals to provide timely and targeted care to at-risk patients.展开更多
An idiopathic renal arteriovenous(AV) fistula is a rare malformation of the kidney that may present insidiously with heart failure or hematuria.The treatment may be challenging due to large fistula size that may limit...An idiopathic renal arteriovenous(AV) fistula is a rare malformation of the kidney that may present insidiously with heart failure or hematuria.The treatment may be challenging due to large fistula size that may limit endovascular management.The authors report a case of an 85-year-old Caucasian woman who presented with acute heart failure and was found to have a right renal AV fistula.Since she had no prior history of renal intervention or trauma,a diagnosis of idiopathic renal AV fistula was made.She was managed by endoluminal occlusion using multiple stainless steel coils and Amplatzer vascular plug II device.The follow-up computed tomography showed complete occlusion of the fistula.This report highlights the late presentation of this rare disease and presents the utility of the combination of coils and Amplatzer device for management of a large fistula.It also reiterates that even if large,these fistulas can be managed by endovascular occlusion.展开更多
基金This work was supported by a grant from the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(MSIT)of the Korean government(2021R1A3B1068304).The authors also acknowledge the support provided by a grant from the NRF funded by MSIT of the Korean government(RS-2023-00243840)and Brain Pool program(RS-2023-00222393).D.W.Boukhvalov acknowledges support from Jiangsu Innovative and Entrepreneurial Talents Project,and the Ministry of Science and Education of Russian Federation(FEUZ-2023-0013).
文摘通过氮掺杂TiO_(2)(N-TiO_(2))浸渍蜂窝过滤器构建了一系列原型光催化空气净化器(AP(N_(x)-C_(y)))系统,并用于在UV-LED光(1 W)照射条件下光催化分解0.5-5 ppm甲醛(CH_(2)O)蒸汽.在上述催化过滤器系统中,Nx和Cy分别代表N/Ti摩尔比(0-20)和N-TiO_(2)浓度(2-20 mg mL^(-1)).光催化分解实验结果表明,AP(N_(10)-C_(10))的性能最好,其催化CH2O转化为CO_(2)的转化率最高,循环反应10次后CO_(2)产率仍达到89.2%,在干燥空气中的清洁空气输送速率为9.45 L min^(-1).N10-C10的电荷载流子寿命(τa:1.70 ns)优于其他样品(如纯TiO_(2)的电荷载流子寿命为1.37 ns),这表明N缺陷(No)有助于降低带隙(3.10 eV)和产生氧空位OVs-Ti^(3+),这与密度泛函理论(DFT)模拟结果一致.采用原位漫反射红外傅里叶变换、电子顺磁共振和DFT分析等多种方法研究了CH_(2)O的光催化氧化途径.结果表明,氧化过程涉及多个能量有利的中间步骤(例如CH2O以CH_(2)O_(2)的形式在TiO_(2)-OV{110}表面的桥连O/OH基团上发生放热共价吸附,随后通过催化脱氢/氧化反应直接生成CO_(2):CH_(2)O_(2)/HCOO^(-)+•OH→H_(2)O+CO_(2)).这些步骤与具有N杂质的{101}表面上化学活性Ti原子的态密度计算结果一致.预计No缺陷和OVs的存在将通过降低活化能垒来影响反应能量和中间产物,从而在加湿条件下实现有效的矿化.综上,本文为设计和构建先进的光催化系统,并用于环境空气中醛类挥发性有机物(VOCs)的有效矿化提供了新思路.
文摘Background Brain stroke is a serious health issue that requires timely and accurate prediction for effective treatment and prevention.This study described a hybrid system that used the best feature selection method and classifier to predict brain stroke.Methods The Stroke Prediction Dataset from Kaggle was used for this study.Synthetic minority over-sampling technique(SMOTE)analysis was used to accomplish class balancing.Accuracy,sensitivity,specificity,precision,and the F-Measure were the main performance parameters considered for investigation.To determine the best combination for predicting brain stroke,the performance of five classifiers,Naïve Bayes(NB),support vector machine(SVM),random forest(RF),adaptive boosting(Adaboost),and extreme gradient boosting(XGBoost),was compared along with three feature selection techniques,mutual information(MI),Pearson correlation(PC),and feature importance(FI).The performance parameters were assessed using k-fold cross-validation.Results The hybrid system proposed in this study identified a reduced set of features that were able to effectively predict brain stroke.FI provided a feature reduction ratio of 36.3%.The most successful hybrid system for predicting brain stroke used FI as the feature selection technique and RF as the classifier,achieving an accuracy of 97.17%.Conclusion The proposed system predicted brain stroke with high accuracy.These findings could be used to inform the early detection and prevention of brain stroke,allowing healthcare professionals to provide timely and targeted care to at-risk patients.
文摘An idiopathic renal arteriovenous(AV) fistula is a rare malformation of the kidney that may present insidiously with heart failure or hematuria.The treatment may be challenging due to large fistula size that may limit endovascular management.The authors report a case of an 85-year-old Caucasian woman who presented with acute heart failure and was found to have a right renal AV fistula.Since she had no prior history of renal intervention or trauma,a diagnosis of idiopathic renal AV fistula was made.She was managed by endoluminal occlusion using multiple stainless steel coils and Amplatzer vascular plug II device.The follow-up computed tomography showed complete occlusion of the fistula.This report highlights the late presentation of this rare disease and presents the utility of the combination of coils and Amplatzer device for management of a large fistula.It also reiterates that even if large,these fistulas can be managed by endovascular occlusion.
