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基于HMI人机接口的内窥镜物联网精细化管理

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计量与测试技术 2024年第3期51卷 119-121页

作者：张琥郑子伟樊楚成都市第三人民医院成都市计量检定测试院

本文以医院内窥镜为例,探索建立基于物联网的医疗器械精细化管理体系。通过HMI人机接口提取数据的方式,进行数据的分析、挖掘及应用,确定管理及决策的优化方向。实验证明:该体系提高了清洗消毒和患者诊疗的平均等待时间及开机率,不仅为... 详细信息

本文以医院内窥镜为例,探索建立基于物联网的医疗器械精细化管理体系。通过HMI人机接口提取数据的方式,进行数据的分析、挖掘及应用,确定管理及决策的优化方向。实验证明:该体系提高了清洗消毒和患者诊疗的平均等待时间及开机率,不仅为医疗器械全流程精细化管理工作的实施提供了有力的保障,而且对最新物联网技术结合内窥镜的原理及实际使用情况的实时采集运行中的重要信息,具有一定的科学意义。

关键词：医疗器械物联网 HMI人机接口优化

Research progress and intelligent trend of accurate modeling of rolling force in metal sheet

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Journal of Iron and Steel Research(International) 2023年第11期30卷 2111-2121页

作者： Shun-hu zhang Yi zhang Wei-gang Li Wen-hao Tian Yan Li Li-zhi Che Shagang School of Iron and Steel Soochow UniversitySuzhou215021JiangsuChina Engineering Research Center for Metallurgical Automation and Measurement Technology of Ministry of Education Wuhan University of Science and TechnologyWuhan430081HubeiChina

The rolling force model is the basis for reasonable selection of rolling equipment and optimization of rolling process,and the establishment of an accurate mathematical model as well as doing the corresponding parameter analysis has been the focus of research in this field for many *** modeling methods of the rolling force and their research progress were introduced,the main methods of which are the theoretical analysis,the finite element simulation,the artificial neural network modeling,the hybrid modeling of theory and neural network,as well as the hybrid modeling of finite element and neural ***,the application examples of rolling force models in thickness control,strip crown control,and schedule optimization were presented,and an outlook on the new directions of future development was made,including establishing new type of hybrid models,solving the black box problem,and realizing the multi-objective optimization accounting for some special requirements.

关键词： Rolling force Parameter optimization Theoretical analysis Finite element simulation Neural network

Microstructures and high-temperature oxidation behavior of directionally solidified Nb-Si-based alloys with Re additions

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Rare Metals 2023年第1期42卷 273-280页

作者： Jie-Chao zhang Li-Na Jia Jun-Fei Weng Lin-Fen Su Bin Kong hu zhang School of Materials Science and Engineering Beihang UniversityBeijing100191China

High-temperature oxidation behavior of directionally solidified(DS) Nb-Si-based alloys with Re additions was investigated at 1200 and 1250℃,*** and high-temperature oxidation behavior of the alloys were *** show that the microstructures in vertical section of Nb-24Ti-15Si-4Cr-2Al-2Hf-xRe(x=0,1,3;at%) alloys grow parallel to the withdrawal direction and the cross section exhibits bud-like *** bud-like structures become finer with more Re *** weight gain of the Nb-24Ti-15Si-4Cr-2Al-2Hf-3Re alloy after oxidation at 1200℃ for 100 h is 198.1 mg·cm^(-2),and it is a bit higher at 1250℃.The other two alloys perform somewhat *** influence of Re addition on the oxidation resistance at 1250℃ is more significant than that at 1200 ℃.Although Re addition does not benefit obviously the high-temperature oxidation resistance of the DS samples,it does not compromise the oxidation resistance with a certain amount of Re additions in contrast with the alloy without Re addition.

关键词： Nb-Si alloys Directional solidification Rhenium addition Oxidation behavior Microstructure

基于信号残差修正与PSO-RVM的混凝土拱坝位移组合预测模型

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水电能源科学 2024年第2期42卷 142-146页

作者：陈泽元徐波储冬冬张祜朱震昊扬州大学水利科学与工程学院江苏扬州225009 江苏省水利科学研究院江苏南京210017

传统的混凝土拱坝位移预测模型仅考虑各类影响因子对预测结果的影响,未充分挖掘残差序列中的有效信息。为此,首先运用关联向量机(RVM)结合粒子群(PSO)算法建立拱坝位移预测的PSO-RVM模型;然后采用奇异谱分析(SSA)对残差序列进行分解,并... 详细信息

传统的混凝土拱坝位移预测模型仅考虑各类影响因子对预测结果的影响,未充分挖掘残差序列中的有效信息。为此,首先运用关联向量机(RVM)结合粒子群(PSO)算法建立拱坝位移预测的PSO-RVM模型;然后采用奇异谱分析(SSA)对残差序列进行分解,并根据奇异值的累计贡献率筛选分量进行重构;其次利用随机森林算法(RF)对重构序列进行预测,得到残差序列的修正值;最后将PSO-RVM模型预测值与残差序列修正值叠加,建立基于信号残差修正与PSO-RVM的混凝土拱坝位移组合预测模型PSO-RVM+。工程实例表明,奇异谱分析与随机森林算法能有效提取残差序列中的有效信息并对残差进行修正;相较于PSO-RVM、RVM及传统的回归模型(SWR)等位移预测模型,PSO-RVM+组合预测模型的预测性能更优、适应性更强。本研究能为大坝安全监控与健康诊断提供一种新的思路。

关键词：混凝土拱坝位移预测信号残差修正关联向量机奇异谱分析随机森林

Behaviors and interactions of strengthening and constraint for ductile Nbss matrix in Nb-Si based alloys

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Progress in Natural Science:Materials International 2022年第2期32卷 215-225页

作者： Yu Wang Lina Jia Chengtong Ye Guangxin Sun hu zhang School of Materials Science and Engineering Beihang University Research Center of Light-alloy Materials Frontier Institute of Science and Technology Innovation Beihang University Ningbo Institute of Technology (NIT) Beihang University Department of Materials Science and Engineering National University of Singapore

The ductile matrix in composites could be strengthened by incorporating brittle inclusions,while the constraint effect for matrix would become more obvious and detrimental to material *** balance between strengthening and toughening was crucial to achieve excellent comprehensive mechanical *** the basis of microstructure of Nb-Si in situ composites,a unit rectangular cell containing elastic and isotropic Nb5Si3particles was modeled,the Niobium solid solution(Nbss) matrix according with the Ramberg-Osgood constitutive relation was recognized as *** Nb-Si based alloys,the effects of volume fractions of Nb5Si3reinforcements,stress states and interfacial characteristics on the stress-strain field,flow localization and damage evolution were investigated by the finite element method(FEM).Further,the normalized work of rupture(χ) was calculated quantitatively as a function of volume fractions of Nb5Si3phase as well as yield strength of Nbss *** results would contribute to acquire more fundamental understanding of the strengthening and constraint effects which were exerted by Nb5Si3reinforcements to ductile Nbssmatrix,also an instructive guidance for the optimum design of Nb-Si based alloys.

关键词： Nb-Si based Alloys Microstructure Fracture characteristics Matrix strengthening Plastic constraint Finite element method

洗心汤对快速老化模型小鼠Th17/Treg细胞免疫平衡及相关转录因子表达的影响

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中国中药杂志 2024年第5期49卷 1353-1360页

作者：张虎第五永长赵恩龙段力琦韩欣悦王登坤刘奇周源陕西中医药大学第一临床医学院陕西咸阳712046 陕西中医药大学陕西咸阳712046

探讨洗心汤对快速老化模型(SAMP8)小鼠肠黏膜辅助性T细胞17(T helper 17 cell,Th17)/调节性T细胞(regulatory T cell,Treg)免疫平衡及相关转录因子表达的影响。50只14周龄的雄性SAMP8小鼠按随机数字表法分为模型组,益生菌组,洗心汤高、... 详细信息

探讨洗心汤对快速老化模型(SAMP8)小鼠肠黏膜辅助性T细胞17(T helper 17 cell,Th17)/调节性T细胞(regulatory T cell,Treg)免疫平衡及相关转录因子表达的影响。50只14周龄的雄性SAMP8小鼠按随机数字表法分为模型组,益生菌组,洗心汤高、中、低剂量组,每组10只。10只14周龄的雄性抗快速老化(SAMR1)小鼠作为对照组。喂养10周后开始连续灌胃10周。Morris水迷宫实验检测小鼠学习记忆能力;酶联免疫吸附法(enzyme-linked immunosorbent assay,ELISA)检测小鼠肠黏膜SIgA(secretory immunoglobulin A)含量;流式细胞术检测小鼠肠黏膜Th17、Treg含量;蛋白免疫印迹法(Western blot)检测小鼠结肠组织视黄酸相关孤儿受体γt(retinoic acid related orphan receptor-γt,RORγt)、叉头盒蛋白p3(forkhead box p3,Foxp3)蛋白的表达。结果显示,与对照组相比,模型组小鼠逃避潜伏期明显延长(P<0.01),60 s内穿越平台次数及目标象限停留时间显著减少(P<0.01);肠黏膜SIgA含量显著降低(P<0.01),Th17含量升高(P<0.05),Treg含量降低(P<0.01);结肠中RORγt蛋白表达明显升高(P<0.01),Foxp3蛋白表达明显降低(P<0.01)。与模型组相比,洗心汤高剂量组小鼠学习记忆能力明显提高(P<0.05或P<0.01);益生菌组,洗心汤高、中剂量组小鼠肠黏膜SIgA含量明显升高(P<0.05或P<0.01),Th17含量降低(P<0.05或P<0.01),Treg含量升高(P<0.05或P<0.01);结肠中RORγt蛋白表达明显降低(P<0.01),Foxp3蛋白表达明显升高(P<0.01)。结果表明,洗心汤可能通过促进SIgA分泌、调节Th17/Treg细胞免疫平衡以及改善RORγt和Foxp3蛋白表达,从而作用于肠道黏膜免疫屏障,影响阿尔茨海默病肠脑信息交换,改善SAMP8小鼠学习记忆能力。

关键词：洗心汤阿尔茨海默病 Th17/Treg平衡

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Effects of minor B additions on tensile strength, fracture toughness and oxidation resistance of Nb–Si based alloys

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Progress in Natural Science:Materials International 2022年第2期32卷 248-258页

作者： Guangxin Sun Lina Jia Yu Wang Zuheng Jin hu zhang School of Materials Science and Engineering Beihang University

The effects of minor additions of B on microstructure,ambient tensile strength,fracture toughness and hightemperature oxidation resistance of Nb-Si based alloys were *** added contents were designed as 0.05,0.10 and 0.20 at.%.The results show constituent phases in 0.05 B and 0.20 B alloys were Nbss,α-Nb5Si3;while only 0.10 B alloy consisted of γ-*** B was prioritized into Nbss and redundant one dissolved into silicide enhanced volume fraction of the *** increasing concentrations of boron,the microstructure was refined at first and then coarsened,while the tensile strength was enhanced *** with other two alloys,the 0.10 B alloy containing γ-Nb5Si3shows both the best fracture toughness and oxidation *** important roles of γ-Nb5Si3in balancing overall properties are emphasized.

关键词： Nb-Si based Alloys Directional solidification Tensile strength Fracture toughness Oxidation resistance

基于稀疏增强动力学模态分解的风力机尾流模型研究

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太阳能学报 2024年第7期45卷 681-690页

作者：张虎许昌魏赏赏霍志红韩星星薛飞飞河海大学能源与电气学院南京211100

基于稀疏增强动力学模态分解(SPDMD)方法对风力机尾流大涡模拟(LES)结果开展降阶模型研究,并将分解结果与标准DMD方法进行比较。结果表明,动力学模态分解方法能提取尾流动态特征,揭示风力机尾流演化规律。标准DMD方法倾向于选择具有小... 详细信息

基于稀疏增强动力学模态分解(SPDMD)方法对风力机尾流大涡模拟(LES)结果开展降阶模型研究,并将分解结果与标准DMD方法进行比较。结果表明,动力学模态分解方法能提取尾流动态特征,揭示风力机尾流演化规律。标准DMD方法倾向于选择具有小尺度和高频率的模态,而SPDMD方法选择具有低频率的大尺度流动特征。相比于标准DMD方法,SPDMD方法在低维子空间上建立风力机非定常尾流场的降阶模型,以较少的模态数目重构和预测风力机尾流场,可提高计算效率。

关键词：风力机尾流动力学模态分解降阶模型

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High catalytic performance of neodymium modified Co_(3)O_(4) for toluene oxidation

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Journal of Rare Earths 2024年第1期42卷 94-101,I0004页

作者： Yanqiong hu Luyue zhang Jianbei zhang Yongjun Liu School of Architecture and Environment Sichuan UniversityChengdu610065China National Engineering Research Center for Flue Gas Desulfurization Chengdu610065China

Co-based catalysts are the most promising catalysts in catalytic oxidation of volatile organic compounds(VOCs).Precious metal doping is adopted to improve the catalytic activity of toluene on Co_(3)O_(4) catalysts,but greatly increases its cost along with *** is found that doping a small amount of rare earth(Ce,Pr,Sm and Nd)can dramatically promote the catalytic activity of Co_(3)O_(4).Especially,the Nd-doped Co_(3)O_(4) catalyst exhibits excellent catalytic activity with a toluene removal rate of 90% at 162.1℃,which is even better than that of Pt-doped Co_(3)O_(4).Compared with other rare earth metal doping,the Nd doping leads to a higher ratio of Co^(3+)/Co^(2+) and has more oxygen *** in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)experiments show that the lattice oxygen of Nd-Co sample can be utilized at a quite low temperature,while that of pure Co_(3)O_(4) cannot engage in oxidation reaction when the temperature is below 200℃,which visually demonstrates the main reason for the improved catalytic performance of Nd-Co catalyst.

关键词： Rare earth metals Nd Co_(3)O_(4) Toluene catalytic oxidation Oxygen vacancy Lattice oxygen