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Establishment of a diagnostic model of coronary heart disease in elderly patients with diabetes mellitus based on machine learning algorithms

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Journal of Geriatric Cardiology 2022年第6期19卷 445-455页

作者： Hu XU Wen-Zhe CAO Yong-Yi bai Jing DONG He-Bin CHE po bai Jian-Dong WANG Feng CAO Li FAN Chinese PLA Medical School Chinese PLA General HospitalBeijingChina Department of Cardiology the Second Medical CenterNational Clinical Research Center for Geriatric DiseasesChinese PLA General HospitalBeijingChina Department of General Surgery the First Medical CenterChinese PLA General HospitalBeijingChina Institute of Geriatrics the Second Medical CenterChinese PLA General HospitalBeijingChina Medical Big Data Research Center&National Engineering Laboratory for Medical Big Data Application Technology Chinese PLA General HospitalBeijingChina Department of Respiratory Diseases Chinese PLA Rocket Force Characteristic Medical CenterBeijingChina

OBJECTIVE To establish a prediction model of coronary heart disease(CHD)in elderly patients with diabetes mellitus(DM)based on machine learning(ML)*** Based on the Medical Big Data Research Centre of Chinese PLA General Hospital in Beijing,China,we identified a cohort of elderly inpatients(≥60 years),including 10,533 patients with DM complicated with CHD and 12,634 patients with DM without CHD,from January 2008 to December *** collected demographic characteristics and clinical *** selecting the important features,we established five ML models,including extreme gradient boosting(XGBoost),random forest(RF),decision tree(DT),adaptive boosting(Adaboost)and logistic regression(LR).We compared the receiver operating characteristic curves,area under the curve(AUC)and other relevant parameters of different models and determined the optimal classification *** model was then applied to 7447 elderly patients with DM admitted from January 2018 to December 2019 to further validate the performance of the *** Fifteen features were selected and included in the ML *** classification precision in the test set of the XGBoost,RF,DT,Adaboost and LR models was 0.778,0.789,0.753,0.750 and 0.689,respectively;and the AUCs of the subjects were 0.851,0.845,0.823,0.833 and 0.731,*** the XGBoost model with optimal performance to a newly recruited dataset for validation,the diagnostic sensitivity,specificity,precision,and AUC were 0.792,0.808,0.748 and 0.880,*** The XGBoost model established in the present study had certain predictive value for elderly patients with DM complicated with CHD.

关键词： patients admitted coronary

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尾矿陶粒制备技术要点分析及应用研究进展

新型建筑材料 2024年第8期51卷 7-12页

作者：王今华张茂亮白坡殷会玲张焕焕万欣娣张冰河南建筑材料研究设计院有限责任公司河南郑州450052 郑州大学化工学院河南郑州450052 河南宏基工程检测咨询有限公司河南郑州450052

尾矿是矿石经选矿后排放的固体废弃物,其堆存规模越来越大,不仅占用土地,还会造成严重的环境污染和资源浪费。对尾矿陶粒的制备技术进行了系统的介绍和技术要点分析,探讨了原料配比、辅料、烧制工艺对陶粒性能的影响,提出了陶粒制备存... 详细信息

尾矿是矿石经选矿后排放的固体废弃物,其堆存规模越来越大,不仅占用土地,还会造成严重的环境污染和资源浪费。对尾矿陶粒的制备技术进行了系统的介绍和技术要点分析,探讨了原料配比、辅料、烧制工艺对陶粒性能的影响,提出了陶粒制备存在的问题和解决途径,介绍了尾矿陶粒在轻质混凝土、水处理滤料、陶粒支撑剂、吸波材料等方面的应用,提出了轻质、多孔、高强尾矿陶粒、复合尾矿陶粒制备技术和拓宽陶粒应用领域是尾矿陶粒未来的主要研究方向。

关键词：尾矿制备技术轻质高强复合尾矿陶粒

High-lattice-adapted surface modifying Na_(4)MnV(po_(4))_(3) for better sodium storage

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Nano Research 2024年第4期17卷 2728-2735页

作者： Chongran Song Shiyu Li Ying bai International Joint Research Laboratory of New Energy Materials and Devices of Henan Province School of Physics and ElectronicsAcademy for Advanced Interdisciplinary StudiesHenan UniversityKaifeng 475004China

Sodium-ion batteries(SIBs)are required to possess long cycle life when used for large-scale energy *** polyanionic Na_(4)MnV(po_(4))_(3)(NMVP)reveals good cyclic stability due to its unique three-dimensional(3D)frame structure,but it still faces the challenge of interfacial degradation in practical *** this work,NASICON-type Na_(1.3)Al_(0.7)Ti_(1.3)(po_(4))_(3)(NATP)was deposited on the surface of NMVP to promote interface stability by surface modification and gradient *** a result,the optimized NMVP@2%NATP released a capacity retention of 44.8%after 1000 cycles at 5 C,much higher than that of the initial NMVP(28.9%).The enhanced electrochemical performance was mainly attributed to NATP coating acting as a fast ion transport carrier and physical barrier,significantly facilitating the Na^(+)diffusion and isolating side reaction at the electrode/electrolyte *** the other hand,Ti_(4)^(+)and Al^(3+)cations from the NATP were partially doped inside the NMVP surface to boost the transport of Na^(+),and the perfect lattice matching of NVMP and NATP improved the interface and structural stability accompanying long *** work demonstrated the effectiveness of surface modification with high lattice match material and provided new perspectives for high energy density solid-state SIBs.

关键词： high-lattice-adapted cathode surface modification sodium-ion batteries

8Cr4Mo4V高温轴承钢润滑条件下的微动磨损行为

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材料热处理学报 2019年第6期40卷 143-154页

作者：吝欢杨卯生舒佰坡昆明理工大学材料科学与工程学院云南昆明650093 钢铁研究总院特殊钢研究所北京100081

采用MoS2、碳纳米管(CNTs)作为添加剂所制备的锂基润滑脂作为润滑条件,研究了8Cr4Mo4V高温轴承钢在润滑减摩条件下的微动磨损性能。结果表明:当滑动速度为0.028 m/s,接触应力增大时,主要磨损机制由轻微磨料磨损变为粘着磨损与磨料磨损;... 详细信息

采用MoS2、碳纳米管(CNTs)作为添加剂所制备的锂基润滑脂作为润滑条件,研究了8Cr4Mo4V高温轴承钢在润滑减摩条件下的微动磨损性能。结果表明:当滑动速度为0.028 m/s,接触应力增大时,主要磨损机制由轻微磨料磨损变为粘着磨损与磨料磨损;当初始接触应力为2.047 GPa,滑动速度从0.014 m/s增大到0.112 m/s时磨损机制主要为磨料磨损;当滑动速度为0.028 m/s时,磨损功耗小于46.82×109 J·m-2,主要以磨料磨损为主,磨损体积增速较缓,当磨损功耗大于46.82×109 J·m-2时,此时开始产生粘着磨损,大于48.14×109 J·m-2时粘着剥落严重,大面积剥落处犁沟深度增加,磨损体积增加迅速,磨损过程中8Cr4Mo4V中大量碳化物的存在对耐磨性具有有益作用。

关键词： 8Cr4Mo4V轴承钢粘着磨损磨料磨损磨损功耗

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工作塔设计浅谈

粮食流通技术 2011年第1期 7-9页

作者：王宁白坡国家粮食储备局郑州科学研究设计院河南郑州450053

主要对工作塔的设计过程进行阐述,并介绍了工作塔设计中采取的优化措施。

关键词：工作塔结构形式优化设计

非小细胞肺癌中nueropilin-1的表达及临床意义

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转化医学电子杂志 2015年第3期2卷 32-33页

作者：白珀董茜第二炮兵总医院呼吸内科中国人民解放军61646部队

目的:探讨neropilin-1(NRP-1)在非小细胞肺癌(NSCLC)中的表达及临床意义.方法:应用免疫组化SP法检测68例NSCLC及癌旁组织中NRP1的表达,分析其表达与NSCLC临床病理参数之间的关系.结果:NSCLC组织中NRP-1阳性表达率明显高于癌旁组织(P<0.0... 详细信息

目的:探讨neropilin-1(NRP-1)在非小细胞肺癌(NSCLC)中的表达及临床意义.方法:应用免疫组化SP法检测68例NSCLC及癌旁组织中NRP1的表达,分析其表达与NSCLC临床病理参数之间的关系.结果:NSCLC组织中NRP-1阳性表达率明显高于癌旁组织(P<0.05).NRP-1在NSCLC组织中的表达与肿瘤直径、P-TNM分期及里淋巴结转移密切相关(P<0.05).结论:NRP-1过度表达在NSCLC发生、发展过程中起重要作用,可能与NSCLC发生侵袭和转移密切相关.

关键词： neropilin-1 非小细胞肺癌免疫组织化学

Dual-additives enable stable electrode-electrolyte interfaces for long life Li-SPAN batteries

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Chinese Chemical Letters 2024年第5期35卷 459-465页

作者： Zhenqiang Guo Huicong Yang Qian Wei Shengjun Xu Guangjian Hu Shuo bai Feng Li School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Biochemistry and Molecular Biology College of Life ScienceChina Medical UniversityShenyang 110122China Dalian National Laboratory for Clean Energy Dalian 116023China Shenyang King power Technology Co. Ltd.Shenyang 110016China

Sulfurized polyacrylonitrile(SPAN)is proposed as a promising cathode material for lithium sulfur ***,the continuous side reactions at the electrolyte-electrode interfaces as well as the slow redox kinetics of SPAN cathode deteriorate the electrochemical *** this study,an electrolyte with dual-additives comprising 2-fluoropyridine(2-FP)and lithium difluorobis(oxalato)phosphate(LiDFBOP)was used to improve the performance of Li||SPAN cells.2-FP has a lower lowest occupied molecular orbital energy than that of the solvents in the electrolyte,leading to its prior reduction.A LiF-rich film can be formed on the electrode,effectively improving the stability of the electrolyte-electrode interfaces and prolonging the ***,LiDFBOP could form an electrolyte-electrode interface film containing a large amount of Li_(x)po_(y)F_(z) species,compensating for the kinetic deterioration caused by the lower ionic conductive of LiF formed at the electrolyte-electrode ***,an electrode-interface film with good chemical stability and high Li^(+) transport was established by LiF and Li_(x)po_(y)F_(z)-rich *** Li||SPAN cell with the electrolyte containing dual-additives demonstrates an excellent capacity retention of 97.5%after 200 cycles at 1.0 C,25℃,comparing to 56.2%capacity retention without ***,the rate capacities of cells with dual-additives can reach 1128.1 mAh/g at 5 C,comparing to only 813.5 mAh/g using electrolyte without *** results shown that the dual-additives in electrolyte provide a promising strategy for practical application of lithium sulfur batteries with SPAN cathodes.

关键词： Sulfurized polyacrylonitrile Lithium metal Interface film 2-Fluoropyridine Difluorobis(oxalato)phosphate

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东魁与荸荠种杨梅叶片春季光合特性比较

安徽农业大学学报 2011年第1期38卷 106-109页

作者：程晓建谷镜张敏王白坡浙江广播电视大学杭州310012 浙江农林大学林业与生物技术学院杭州311300

春季田间条件下,以浙江省主栽品种东魁和荸荠种杨梅为试材,对其叶片光合特性、比叶重、叶绿素含量和碳水化合物含量等差异进行了比较研究。结果表明,东魁和荸荠种杨梅叶片的净光合速率日变化均为双峰型曲线,有明显的"午休"现象;东魁杨... 详细信息

春季田间条件下,以浙江省主栽品种东魁和荸荠种杨梅为试材,对其叶片光合特性、比叶重、叶绿素含量和碳水化合物含量等差异进行了比较研究。结果表明,东魁和荸荠种杨梅叶片的净光合速率日变化均为双峰型曲线,有明显的"午休"现象;东魁杨梅净光合速率、水分利用率和气孔导度的日均值显著高于荸荠种杨梅,而日平均蒸腾速率显著低于荸荠种杨梅;午间光合速率和胞间CO2浓度下降,变化趋势一致,气孔限制值升高,表明光合速率午间降低主要是受气孔限制因素影响。东魁杨梅的叶绿素含量和叶绿素a/b略低于荸荠种杨梅,但无显著差异,而荸荠种杨梅叶片的比叶重、可溶性糖、还原糖和淀粉含量都明显高于东魁杨梅,且差异显著。

关键词：杨梅光合作用叶绿素比叶重可溶性糖

An Improved Z-buffer Accelerated po Method for EM Scattering from Electrically Large Targets

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Chinese Journal of Electronics 2024年

作者： Jiangfei bai Shunchuan YANG Donglin SU School of Electronics and Information Engineering Beihang University Research Institute for Frontier Science Beihang University

The physical optical(po) method is widely used to solve the electromagnetic scattering problems involved electrically large structures, in which each surface element is required to determine whether it is blocked by others. It may suffer from the computational efficiency issue through elementwise shadowing testing. In this paper, an efficient Z-buffer based shadowing testing method is proposed to accelerate this procedure. In the proposed method,all triangular facets are first mapped to a grid plane as the Z-buffer method, and for each grid cell, all projected triangles intersecting it are recorded. Then, rigorous shadowing testing is made for all facets recorded in the grid where the centroid of each triangle is projected. It can avoid a large number of redundant operations for pairs of triangles with no occlusion relation, which lead to the same accuracy as the traditional rigorous shadowing testing method with significantly efficiency improvement. Four numerical examples are carried out to validate its accuracy and efficiency.

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