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An AI-empowered indoor digital contact tracing system for COVID-19 outbreaks in residential care homes

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Infectious Disease Modelling 2024年第2期9卷 474-482页

作者： Jiahui Meng Justina Yat Wa Liu Lin Yang Man Sing Wong Hilda Tsang Boyu Yu Jincheng Yu Freddy Man-Hin Lam Daihai He Lei Yang Yan Li Gilman Kit-Hang Siu Stefanos Tyrovolas Yao Jie xie David Man David H.K.Shum School of Nursing The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Electronic and Information Engineering The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Research Centre of Textiles for Future Fashion The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Applied Mathematics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina The Jockey Club School of Public Health and Primary Care The Chinese University of Hong KongHong Kong Special Administrative RegionChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Computing The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Health Technology and Informatics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Nutrition and Food Studies George Mason UniversityUSA Tung Wah College Hong Kong Special Administrative RegionChina Mental Health Research Centre The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina

An AI-empowered indoor digital contact-tracing system was developed using a centralized architecture and advanced low-energy Bluetooth technologies for indoor positioning,with careful preservation of privacy and data *** analyzed the contact pattern data from two RCHs and investigated a COVID-19 outbreak in one study *** evaluate the effectiveness of the system in containing outbreaks with minimal contacts under quarantine,a simulation study was conducted to compare the impact of different quarantine strategies on outbreak containment within *** significant difference in contact hours between weekdays and weekends was observed for some pairs of RCH residents and staff during the two-week data collection *** significant difference between secondary cases and uninfected contacts was observed in a COVID-19 outbreak in terms of their demographics and contact *** results based on the collected contact data indicated that a threshold of accumulative contact hours one or two days prior to diagnosis of the index case could dramatically increase the efficiency of outbreak containment within RCHs by targeted isolation of the close *** study demonstrated the feasibility and efficiency of employing an AI-empowered system in indoor digital contact tracing of outbreaks in RCHs in the post-pandemic era.

关键词： COVID-19 Indoor contact tracing Contact pattern Outbreak containment Artificial intelligence

Establishment and Evaluation of a Mouse Model of Allergic Rhinitis

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Medicinal Plant 2024年第4期15卷 111-113,121页

作者： Xiang QIN Yuan PAN Xiaoni PAN Yanfeng MO Shuwen LI Tingting xie Lixiang LU Jiancheng LIANG Shiyou ZHOU Suoyi HUANG School of Clinical Medicine Youjiang Medical University for NationalitiesBaise 533000China School of Public Health and Management Youjiang Medical University for NationalitiesBaise 533000China School of Pharmacy Youjiang Medical University for NationalitiesBaise 533000China Key Laboratory of Research on Characteristic Ethnic Medicine in the Youjiang River Basin of Guangxi Colleges and Universities Baise 533000China

[Objectives]To explore a new method for induction of allergic rhinitis in mice,and compare and evaluate it with common modeling methods.[Methods]36 mice were randomly divided into the control group,blank group and experimental group,and there were 12 mice in each *** mice in the control group were conventionally *** is,the mice were first injected intraperitoneally with the mixture composed of OVA 50μg,[Al(OH)3]5 mg and 1ml of normal saline once every other day,and then since the 15 th d,20μL of 5%OVA solution was dropped into each nasal cavity once a day,which lasted for 7 *** blank group was treated with the same amount of normal saline according to the control group,and received intraperitoneal injection and bilateral nasal drip *** the experimental group,mice were first given intraperitoneal injection of the mixture composed of ovalbumin(OVA)75μg,aluminum hydroxide gel[Al(OH)3]8 mg and normal saline 1.5 mL for basic *** the 26 th d,20μL of 3%OVA solution was dropped into each nasal cavity once a day,which lasted for 10 *** number of sneezes,the number of nose scratching,the amount of nasal discharge,and the activity of mice in each group were observed,and the behavior of allergic reaction was ***,the number of eosinophils in the nasal discharge of mice and the IgE content in serum were measured.[Results]The score of nasal stimulation symptoms,the number of eosinophils and serum IgE level of mice in the control group and the experimental group were higher than those in the blank group(P0.05).[Conclusions]The modeling method was more suitable for the development of allergic rhinitis patients condition,and reduced the probability of death of mice due to modeling,and simplified the experimental operation.

关键词： Allergic rhinitis Mouse model Modeling effect

内外水力交互下浅埋带压盾构隧道水土压力计算模型

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岩土工程学报 2024年第8期46卷 1685-1694页

作者：谢家冲黄昕金国龙张子新同济大学土木工程学院地下建筑与工程系上海200092 新疆大学建筑工程学院新疆乌鲁木齐830047 同济大学岩土及地下工程教育部重点实验室上海200092 中船第九设计研究院工程有限公司上海200063 加泰罗尼亚理工大学土木与环境工程学院巴塞罗那08034

针对浅埋有压盾构隧道内外水力交互渗流下引起的松动水土压力变化,基于修正镜像法获得了考虑内水压的地层渗流场分布与水力梯度。随后基于考虑松动区内部应力分布的修正Terzaghi公式给出了考虑隧道内水压下的松动区任意位置的水土压力解... 详细信息

针对浅埋有压盾构隧道内外水力交互渗流下引起的松动水土压力变化,基于修正镜像法获得了考虑内水压的地层渗流场分布与水力梯度。随后基于考虑松动区内部应力分布的修正Terzaghi公式给出了考虑隧道内水压下的松动区任意位置的水土压力解,并与数值模拟结果进行了对比验证。主要结论如下:采用圆弧拱和抛物线拱的主应力轨迹线能够有效描述隧顶松动区应力分布情况;当地层渗透系数与衬砌渗透系数比值小于1000时,内压水头大小对水土压力的影响显著;内压水头的增加将减小松动区有效应力,引起上覆土体卸载,同时引起隧顶松动区总应力增大,表明该范围内孔隙水压的增长对水土压力的变化占据主导作用;5参数正交分析结果的线性回归分析结果表明隧道埋深和半径对土压力有显著的正向影响,土体摩擦角和黏聚力均表现为负向影响。在相对低渗透地层条件下,内压水头对隧顶有效应力和总应力分别表现为显著的负向和正向影响。

关键词：带压盾构隧道衬砌渗漏内水外渗松动土压力土拱镜像法

Leakage current characteristics of SrTiO_(3)/LaNiO_(3)/Ba_(0.67)Sr_(0.33)TiO_(3)/SrTiO_(3 )heterostructure thin films

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Rare Metals 2021年第4期40卷 961-967页

作者： Yi Zhang Xiao-Yang Chen Bin xie zhi Wang Ming-Jian Ding Qiao He Hang Ji Tao-Lan Mo Ping Yu College of Material Science and Engineering Sichuan UniversityChengdu 610064China Aurora Technologies Co. LtdGuangzhou 510288China

There is an urgent demand to explore new approaches of improving the electric breakdown strength of the ferroelectric thin-film capacitor without the degradation of the high dielectric *** this work,LaNiO_(3)/Ba_(0.67)Sr_(0.33)TiO_(3)(LNO/BST) thin film and SrTiO_(3)(STO)/LNO/BST/SrTiO_(3)(STO) were prepared by using radio frequency(RF) magnetron sputtering technique and ultrathin STO insulator layers were inserted between the LNO/BST and metal electrodes(Au or Pt) to improve the electric breakdown strength and the leakage current of the LNO/BST thin film.X-ray diffraction(XRD) and scanning electron microscopy(SEM) investigations revealed that these multilayer thin films show compact,smooth and uniform *** leakage current density of STO/LNO/BST/STO thin film was decreased by one order of magnitude and breakdown strength of STO/LNO/BST/STO thin film was enhanced from 0.72 to 1.26 MV-cm-1compared with that of LNO/BST thin ***,the dielectric constant of the STO/LNO/BST/STO thin film keeps at the same level as that of LNO/BST thin film,and dielectric loss of the STO/LNO/BST/STO thin film was decreased slightly compared with that of LNO/BST thin film.

关键词： LNO/BST Interface engineering Breakdown strength Barrier layer SrTiO_(3)

Determination of Benzoylaconitine Compounds in the Decoctions of Aconiti Lateralis Radix Praeparata(Heishun Pieces),Trichosanthis Fructus and Their Combination

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Medicinal Plant 2024年第3期15卷 1-3,22页

作者： Luyao xie Xiaoxia LI Jing FU Jinhua LIU Yaobin HUANG Xuri WEI Tingting MO Shaomian PAN Lin HUANG Jiabao MA Graduate School of Guangxi University of Chinese Medicine Nanning 530200China The First Affiliated Hospital of Guangxi University of Chinese Medicine Nanning 530023China

[Objectives]This study was conducted to determine the contents of benzoylmesaconine,benzoylaconitine and benzoylhypacoitine in the decoctions of Heishun pieces,Trichosanthis Fructus and their combination.[Methods]Heishun pieces,Trichosanthis Fructus and their combination were extracted for different time periods,and then *** was performed using an Agilent ZORBAX SB-C 18 chromatographic column(4.6 mm×250 mm,5μm)and acetonitrile-0.02 mol/L sodium dihydrogen phosphate as the mobile phase at a flow rate of 1 mL/min and a column temperature of 30℃,and the sample volume was 20μ*** detection wavelength was 230 nm.[Results]The total amounts of benzoylmesaconine,benzoylaconitine and benzoylhypacoitine in the single decoction group of Heishun pieces were all significantly different from those in the combined decoction group at corresponding time.[Conclusions]The total content of the benzoylaconitine type increased significantly after the combined decoction of Heishun pieces and Fructus Trichosanthis,which proves the scientificity of"eighteen incompatible medicaments,19 counteraction"in traditional Chinese medicine to some extent.

关键词： Aconiti Lateralis Radix Praeparata Trichosanthis Fructus Benzoylaconitine compound Content determination

超声引导蝶腭神经节阻滞在功能性内窥镜鼻窦手术术后镇痛中的应用

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中国医药指南 2024年第6期22卷 47-49页

作者：唐智林兰香李美琪何丛香谢明浩东莞市沙田医院东莞523980

目的探索超声引导蝶腭神经节阻滞在功能性内窥镜鼻窦手术术后镇痛中的应用优势与价值。方法研究以收治的功能性内窥镜鼻窦手术患者作为研究样本支撑本次研究,患者数量40例,时间节点截取:2021年7月至2023年6月,按照随机抽取盲信封方式将... 详细信息

目的探索超声引导蝶腭神经节阻滞在功能性内窥镜鼻窦手术术后镇痛中的应用优势与价值。方法研究以收治的功能性内窥镜鼻窦手术患者作为研究样本支撑本次研究,患者数量40例,时间节点截取:2021年7月至2023年6月,按照随机抽取盲信封方式将患者抽取为两组,患者均开展超声引导蝶腭神节阻滞术,对照组在蝶腭神经节附近注射0.9%的氯化钠2 ml,观察组在蝶腭神经节附近注射0.5%罗哌卡因2 ml,观察患者各项指标变化。结果观察组围手术期满意度分值相比于对照组更高,可见统计差(P0.05);观察组患者各时间点(T_(1)、T_(2)、T_(3))指标相比对照组差值明显,P<0.05。观察组不良反应(5.00%)低于对照组(25.00%),P<0.05。结论功能性内窥镜鼻窦手术术后镇痛中超声引导蝶腭神经节阻滞应用价值显著,可以显著地降低患者疼痛感,保证血流动力学稳定,改善患者以后,降低不良反应,减少手术对患者产生的刺激性,促使患者尽早恢复健康,具有较高的应用价值,值得临床推广应用。

关键词：功能性内窥镜鼻窦手术镇痛超声引导蝶腭神经节阻滞

乔木根径、含量和分布类型对根土复合体饱和渗透系数的影响

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土木与环境工程学报（中英文） 2024年第5期46卷 16-25页

作者：胡兵立苏立君谢奇峻中国科学院山地灾害与地表过程重点实验室中国科学院、水利部成都山地灾害与环境研究所成都610299 中国科学院大学北京100049 中巴地球科学联合研究中心巴基斯坦伊斯兰堡

植物根系对土体的水力特性具有重要影响,但关于乔木根系对土体饱和渗透系数的定量研究缺乏。利用自制渗透实验箱,采用定水头实验方法,针对重塑根土复合体开展不同根径(1 mm≤d≤3mm、3 mm 详细信息

植物根系对土体的水力特性具有重要影响,但关于乔木根系对土体饱和渗透系数的定量研究缺乏。利用自制渗透实验箱,采用定水头实验方法,针对重塑根土复合体开展不同根径(1 mm≤d≤3mm、3 mm

关键词：根土复合体饱和渗透系数含根量根分布类型

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CFRP-铝合金复合管高强混凝土短柱轴压性能研究

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建筑钢结构进展 2024年第4期26卷 1-9页

作者：王兰姜航谢文超叶勇福建理工大学土木工程学院福州350018 大连理工大学建设工程学院辽宁大连116024 华侨大学土木工程学院福建厦门361021

为研究CFRP-铝合金复合管混凝土构件的轴压性能,进行了12根短柱试件的轴向压缩试验,主要研究参数为CFRP层数。试验结果表明:复合管混凝土试件出现了多处外凸鼓曲以及对应位置混凝土被压溃的破坏形态,而空复合管试件发生了局部内凹屈曲破... 详细信息

为研究CFRP-铝合金复合管混凝土构件的轴压性能,进行了12根短柱试件的轴向压缩试验,主要研究参数为CFRP层数。试验结果表明:复合管混凝土试件出现了多处外凸鼓曲以及对应位置混凝土被压溃的破坏形态,而空复合管试件发生了局部内凹屈曲破坏;试件轴压承载力随CFRP层数的增加而增大,且复合管混凝土试件的承载力提高幅度高于相应的空复合管试件的提高幅度。对各部分的承载力贡献比例进行分析,发现复合管混凝土试件中混凝土的承载力贡献比例超过70%,且承载力贡献度随CFRP层数的增加而提高。提出了CFRP-铝合金复合管混凝土构件的轴压承载力计算公式。

关键词：铝合金管混凝土碳纤维增强塑料(CFRP) CFRP-铝合金复合管轴压性能组合作用

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分离式路基在堤防道路中的应用

工程技术研究 2024年第3期9卷 110-112页

作者：彭军王永庆谢亦红尹祖超长江勘测规划设计研究有限责任公司湖北武汉430010 上饶市水利局江西上饶334000

堤防道路设计中防洪、交通、景观和周边地块衔接的复杂问题一直是业内探讨的课题。文章以武汉市长江主轴示范段左岸大道为例,在充分考虑道路交通、防洪、景观功能的基础上,分析了堤防道路沿线的主要控制因素,提出了分离式路基方案,详细... 详细信息

堤防道路设计中防洪、交通、景观和周边地块衔接的复杂问题一直是业内探讨的课题。文章以武汉市长江主轴示范段左岸大道为例,在充分考虑道路交通、防洪、景观功能的基础上,分析了堤防道路沿线的主要控制因素,提出了分离式路基方案,详细介绍了分离式路基在堤防道路中平面、纵断面、横断面设计中的注意事项,同时对慢行交通、排水、交通安全、绿化景观提出了参考解决方案,可供类似堤防道路工程设计参考。

关键词：分离式路基堤防道路设计城市道路防洪