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基于不同机器学习算法的钙钛矿材料性能预测 被引量:17
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作者 郑伟达 张惠然 +4 位作者 胡红青 刘尧 李盛洲 丁广太 张金仓 《中国有色金属学报》 EI CAS CSCD 北大核心 2019年第4期803-809,共7页
钙钛矿材料由于在各领域具有广泛的应用前景而备受材料学家的关注,对其各种物理化学性能的研究一直是材料领域研究的热点。本文建立随机森林(Randomforest,RF)、岭回归(Ridgeregression,RR)、以及基于径向基核函数和线性核函数的支持向... 钙钛矿材料由于在各领域具有广泛的应用前景而备受材料学家的关注,对其各种物理化学性能的研究一直是材料领域研究的热点。本文建立随机森林(Randomforest,RF)、岭回归(Ridgeregression,RR)、以及基于径向基核函数和线性核函数的支持向量回归(Support vector regression,SVR)等4种机器学习算法的预测模型,对钙钛矿材料数据集中的密度、形成能、带隙、晶体体积等4种性能参数进行预测。结果表明:RF方法可以对钙钛矿材料的密度、带隙性能进行有效预测;RR方法可以实现对密度性能的预测;线性核函数的SVR方法可以实现对形成能性能的预测。该研究表明,不同的机器学习算法对数据样本分布的敏感程度不同,因此针对不同的性能参数预测需要选择不同方法。 展开更多
关键词 钙钛矿材料 机器学习 性能预测 算法选择
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小儿重症肺炎经鼻高流量加温湿化氧疗撤机失败的危险因素分析 被引量:5
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作者 郑丽玲 郑伟达 杨小云 《中国当代医药》 CAS 2021年第20期21-25,共5页
目的探讨小儿重症肺炎经鼻高流量加温湿化氧疗(HFNC)撤机失败的危险因素。方法回顾性分析2019年1月—2020年2月入住漳州市医院儿童重症监护室(PICU)的118例小儿重症肺炎使用HFNC者的临床资料,根据HFNC是否成功撤离分为成功组(n=80)和失... 目的探讨小儿重症肺炎经鼻高流量加温湿化氧疗(HFNC)撤机失败的危险因素。方法回顾性分析2019年1月—2020年2月入住漳州市医院儿童重症监护室(PICU)的118例小儿重症肺炎使用HFNC者的临床资料,根据HFNC是否成功撤离分为成功组(n=80)和失败组(n=38)。比较两组患儿的一般资料、动脉血气指标、基础病发生率、并发症发生率,采用多因素Logistic回归分析小儿重症肺炎HFNC撤机失败的危险因素。结果118例小儿重症肺炎使用HFNC撤机失败的占比为32.20%。失败组患儿的总住院时间以及入住PICU时间均长于成功组,差异有统计学意义(P<0.05);失败组患儿的白细胞、二氧化碳分压高于成功组,氧合指数低于成功组,差异有统计学意义(P<0.05);失败组存在心脏病、营养不良、早产儿等基础病的比例高于成功组,差异有统计学意义(P<0.05);失败组患儿并发心力衰竭、呼吸机相关肺炎的比例高于成功组,差异有统计学意义(P<0.05)。多因素Logistic回归分析结果显示,合并心力衰竭(β=1.639,OR=5.148,95%CI:1.424~18.611)、早产儿(β=1.229,OR=3.418,95%CI:0.535~21.846)、总住院时间长(β=0.164,OR=1.178,95%CI=1.039~1.336)是HFNC失败的危险因素(P<0.05),入院时氧合指数高(β=-0.015,OR=0.985,95%CI:0.975~0.996)是HFNC撤机失败的保护因素(P<0.05)。结论HFNC可以用于PICU小儿重症肺炎的治疗,但是存在失败病例,存在基础病(如早产儿或合并有心力衰竭)是HFNC撤机失败的高危因素,会增加总住院时间,入院时可通过相关病史及临床表现,结合血气及氧合指数,综合分析并进行初步判断,选择正确的呼吸支持模式,使患儿得到更好的治疗。 展开更多
关键词 儿童 重症肺炎 呼吸支持 二氧化碳分压 经鼻高流量加温湿化氧疗
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Cidan Capsule in Combination with Adjuvant Transarterial Chemoembolization Reduces Recurrence Rate after Curative Resection of Hepatocellular Carcinoma:A Multicenter,Randomized Controlled Trial 被引量:6
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作者 zheng Dong-hai YANG Jia-mei +14 位作者 WU Jian-xiong CHENG Shu-qun ZHANG Shao-geng WU Dong LI Aijun FU Xiao-hui LI Xun QI Fu-chen DUAN Wei-hong CHEN Jun-hui YANG Zhi-ying LIANG Lu ZENG Jin-xiong zheng wei-da WU Meng-chao 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2023年第1期3-9,共7页
Objective:To evaluate the efficacy and safety of Cidan Capsule combined with adjuvant transarterial chemoembolization(TACE) in patients with a high risk of early recurrence after curative resection of hepatocellular c... Objective:To evaluate the efficacy and safety of Cidan Capsule combined with adjuvant transarterial chemoembolization(TACE) in patients with a high risk of early recurrence after curative resection of hepatocellular carcinoma(HCC).Methods:A multicenter,randomized controlled trial was conducted in patients with high-risk recurrence factors after curative resection of HCC from 9 medical centers between July 2014 and July 2018.Totally249 patients were randomly assigned to TACE with or without Cidan Capsule administration groups by stratified block in a 1:1 ratio.Postoperative adjuvant TACE was given 4-5 weeks after hepatic resection in both groups.Additionally,125 patients in the TACE plus Cidan group were administrated Cidan Capsule(0.27 g/capsule,5 capsules every time,4 times a day) for 6 months with a 24-month follow-up.Primary endpoints included diseasefree survival(DFS) and tumor recurrence rate(TRR).Secondary endpoint was overall survival(OS).Any drugrelated adverse events(AEs) were observed and recorded.Results:As the data cutoff on July 9th,2018,the median DFS was not reached in the TACE plus Cidan group and 234.0 days in the TACE group(hazard ratio,0.420,95%confidence interval,0.290-0.608;P<0.01).The 1-and 2-year TRR in the TACE plus Cidan and TACE groups were 31.5%,37.1%,and 60.8%,63.4%,respectively(P<0.01).Median OS was not reached in both groups.The1-and 2-year OS rates in TACE plus Cidan and TACE groups were 98.4%,98.4%,and 89.5%,87.9%,respectively(P<0.05).The most common grade 3-4 AEs included fatigue,abdominal pain,lumbar pain,and nausea.One serious AE was reported in 1 patient in the TACE plus Cidan group,the death was due to retroperitoneal mass hemorrhage and hemorrhagic shock,and was not related to study drug.Conclusions:Cidan Capsule in combination with TACE can reduce the incidence of early recurrence in HCC patients at high-risk of recurrence after radical hepatectomy and may be an appropriate option in postoperative anti-recurrence treatment.(Registration No.NCT02253511) 展开更多
关键词 hepatocellular carcinoma HEPATECTOMY RECURRENCE SURVIVAL transarterial chemoembolization Cidan Capsule
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