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China CDC weekly 2024年第2期6卷 30-35,I0001-I0007页

作者： Huiyun Chang Chong Liu xingyi geng Xiumiao Peng Ke Huang Liheng Wang Liangliang Cui Department of Scientific Research and Education Jinan Municipal Center for Disease Control and PreventionJinan Municipal Center for Disease Control and Prevention Affiliated to Shandong UniversityJinan CityShandong ProvinceChina Jinan Health Well Development Center Jinan CityShandong ProvinceChina Department of Environmental Health Jinan Municipal Center for Disease Control and PreventionJinan CityShandong ProvinceChina Department of Emergency Jinan Medical Emergency CenterJinan CityShandong ProvinceChina

What is already known about this topic?Studies have extensively documented the separate and independent effects of extreme temperature and ozone on morbidity and mortality associated with respiratory and circulatory *** is added by this report?The study revealed a significant association between elevated temperature,ozone pollution,and the combined effect of high temperature and ozone pollution with an increased risk of all-cause medical emergency calls(MECs)and MECs specifically related to neurological *** are the implications for public health practice?Interventional measures should be implemented to mitigate exposure to high temperatures and ozone ***,during the warm season,it is crucial for relevant authorities to focus on disseminating scientific information regarding the health impacts of elevated temperatures and ozone ***,timely public health advisories should be issued to alert the public effectively.

关键词： ozone elevated pollution

济南市某县动物防疫员感染布鲁氏菌病聚集性疫情的调查分析

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实用预防医学 2024年第5期31卷 615-617页

作者：杨丽常彩云于雪马若群高尚耿兴义隋庆梅济南市疾病预防控制中心山东济南250021

目的2021年9月和2022年7月济南市某县畜牧实业发展中心先后报告两起布鲁氏菌病暴发疫情,为采取有效措施控制和预防今后类似事件发生,开展了现场流行病学调查。方法采集病例的血液样本进行实验室检测。对病例的调查结果和实验室检测结果... 详细信息

目的2021年9月和2022年7月济南市某县畜牧实业发展中心先后报告两起布鲁氏菌病暴发疫情,为采取有效措施控制和预防今后类似事件发生,开展了现场流行病学调查。方法采集病例的血液样本进行实验室检测。对病例的调查结果和实验室检测结果进行描述性流行病学分析。结果2021年9月—2022年8月济南市某县畜牧实业发展中心共报告17例布鲁氏菌病,其中2021年报告10例,2022年报告7例。经流行病学调查发现,所有病例均为来自乡镇站点的工作人员,日常工作为到养殖户现场进行牲畜检疫采血、布氏菌苗接种和畜间布病调查等。报告病例平均年龄38.2岁(24~54岁),男女性别比为1.43∶1。该中心下属的7个站点均报告病例,其中2021年病例分布在6个站点,2022年病例分布在3个站点。各站点发病情况与对应责任区域内的居民发病情况比较,未发现相关性。2021年病例均在9月份报告,发现方式均为单位常规体检。2022年7月份报告病例5例(71.43%)和8月份报告2例(28.57%),发现方式均为主动就诊。主要临床表现关节酸痛(8例)、乏力(2例)、多汗(1例)和发热(1例)。经调查病例仅在对牲畜采血和接种操作时才会采取防护措施(防护衣、手套、口罩),其他工作如前往养殖户场所调查处置动物疫情、日常监管、疫苗接种登记、残液冲洗时未进行防护。结论两起布鲁氏菌疫情暴发的病例均发生在发展中心乡镇场站的现场工作人员,动物疫苗接种的暴露方式比例较高。工作后应做好洗澡等防护,可以减少感染布鲁氏病的风险。

关键词：动物防疫员布鲁氏菌病聚集性疫情

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“平急两用”病原检测体系韧性建设策略研究

中国公共卫生管理 2024年第3期40卷 458-461页

作者：崔永学王加坤张语李春燕金雅晴马彩霞耿兴义济南市疾病预防控制中心山东济南250021

新冠疫情警示我们,病原检测是打赢疫情防控战不可或缺的重要防线。当前新形势下,大量设备面临闲置,病原检测体系需要同时具备常态化运营和应急扩容能力,形成符合国家发展规划要求的“平急两用”运行机制。通过调查现行病原微生物基因扩... 详细信息

新冠疫情警示我们,病原检测是打赢疫情防控战不可或缺的重要防线。当前新形势下,大量设备面临闲置,病原检测体系需要同时具备常态化运营和应急扩容能力,形成符合国家发展规划要求的“平急两用”运行机制。通过调查现行病原微生物基因扩增检验实验室运行情况,采用SWOT分析探讨闲置设备转型应用以及“平急两用”体系建设规划发现,现有检测机构与专业人员的转型意愿较强、设备充足,但现行体系未形成“平急两用”机制,缺乏相关检测项目的宣传,疫情期紧急上岗的检测人员缺乏系统培训。因此,需在以韧性思维构建设备轮换体系、发挥制度优势提升转换效能的基础上,继续推进医防融合,做好检测人员梯队建设并建立应急资金供给机制。

关键词：基因扩增体系管理平急两用

Structural engineered living materials

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Nano Research 2024年第2期17卷 715-733页

作者： Yang geng Zian Jia Ling Li 635 Prices Fork Road Department of Mechanical EngineeringVirginia Polytechnic Institute and State UniversityBlacksburg VA24061USA

Biological structural materials not only exhibit remarkable mechanical properties but also often embody dynamic characteristics such as environmental responsiveness,autonomy,and self-healing,which are difficult to achieve in conventional engineering *** merging materials science,synthetic biology,and other disciplines,engineered living materials(ELMs)provide a promising solution to combine living organisms with abiotic components,thus facilitating the construction of functional“living”*** natural materials,ELMs possess vitality and hold immense application potential in areas such as medicine,electronics,and construction,captivating increasing research attention *** an emerging branch of ELMs,structural ELMs aim to mimic living biological structural materials by achieving desired mechanical performance while maintaining important“living”*** we summarize the recent progress and provide our perspectives for this emerging research *** first summarize the superiority of structural ELMs by reviewing biological structural materials and biomimetic material design ***,we provide a systematic discussion on the definition and classifications of structural ELMs,their mechanical performance,and physiological ***,we summarize some critical challenges faced by structural ELMs and highlight directions of future *** hope this review article can provide a timely summary of the state of the art and relevant perspectives for future development of structural ELMs.

关键词： structural materials engineered living materials(ELMs) structural ELMs composites mechanical properties

Mixed Dead-time Effect Suppression Strategy for Modular Multilevel Converters

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1075-1084页

作者： Zhi geng Minxiao Han School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing 102206China IEEE

Dead time is necessary for the coupled power switches to prevent shoot-through,especially in the modular multilevel converters(MMCs)with a large number of power *** paper proposes a dead-time effect suppression strategy for MMCs with nearest level *** operational principles of MMCs are first *** to the operational features of MMCs,the method that removes a switching signal from the coupled switches and the reduced switching frequency voltage balancing algorithms(RSFVBAs)are mixed in the proposed *** the intervals that are furthest away from the zerocrossing points(ZCP)of arm currents,the single switching signal method can completely eliminate the dead-time effect(DTE).Alternatively,the DTE is suppressed by the RSFVBA in intervals that are close to the *** the combination of the two methods,the dependence of the DTE suppression method on currents is reduced and the influences of ZCP are also released without degrading the normal operation performance of ***,the output performance of MMCs is improved and the voltage stress on the arm inductor dramatically ***,the validation of the method is verified by the simulation results with the professional tool Matlab/Simulink.

关键词： Dead-time effect modular multilevel converters switching frequency voltage balancing algorithm

Investigation of an Adenovirus-Induced Respiratory Disease Outbreak

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Advances in Infectious Diseases 2013年第4期3卷 257-262页

作者： xingyi geng Ji Zhang Guoliang Yang Jinan Municipal Center for Disease Control and Prevention Jinan China

Objective: An epidemiological investigation was carried out in school X in Jinan, Shandong Province, China, to identify the cause, epidemiology, and etiological characteristics of a febrile respiratory disease outbreak;and therefore to control the dissemination. Methods: Both field epidemiological investigations and laboratory examinations were carried out. Results: Forty cases were identified, in which 38 cases were students and two were teachers. Clinical manifestations included fever, coughing, headache, and sore throat. A total of 21 pharyngeal swab specimens were collected and 18?tested positive for adenovirus. The adenovirus hexon gene was sequenced in three of the 18 positive specimens and the results?showed a 100% homology with the standard HAdV-55 HEXO. Conclusions: The outbreak originated from an adenovirus-infected student, who spread the pathogen to her classmates and teacher. The teacher then further disseminated the disease within the school which led to 40 febrile respiratory infections.

关键词： Epidemiology Research Methods Laboratory Examination Adenovirus Respiratory Disease

Boosting electrocatalytic nitrate reduction to ammonia via Cu_(2)O/Cu(OH)_(2)heterostructures promoting electron transfer

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Nano Research 2024年第6期17卷 4898-4907页

作者： Jing geng Sihan Ji Anhui Province International Research Center on Advanced Building Materials School of Materials Science and Chemical EngineeringAnhui Jianzhu UniversityHefei 230601China Anhui Province Key Laboratory of Advanced Building Materials Anhui Jianzhu UniversityHefei 230601China School of Energy Materials and Chemical Engineering Hefei UniversityHefei 230601China

Electrocatalytic nitrate(NO_(3)^(−))reduction to ammonia(NH_(3))offers a viable approach for sustainable NH_(3)production and environmental ***(Cu)possesses a distinctive electronic structure,which can augment the reaction kinetics of NO_(3)^(−)and impede hydrogen evolution reaction(HER),rendering it a promising contender for the electrosynthesis of NH_(3)from NO_(3)^(−).Nevertheless,the role of Cu_(2)O in copper-based catalysts still requires further investigation for a more comprehensive ***,the Cu_(2)O/Cu(OH)_(2)heterostructures are successfully fabricated through liquid laser irradiation using CuO nanoparticles as a *** and theoretical researches reveal that Cu_(2)O/Cu(OH)_(2)heterostructure exhibits enhanced electrocatalytic performance for NO_(3)^(−)to NH_(3)because Cu(OH)_(2)promotes electron transfer and reduces the valence state of Cu active site in Cu_(2)***−0.6 V(*** hydrogen electrode(RHE)),the NH_(3)yield reaches its maximum at 1630.66±29.72μg·h^(−1)·mgcat^(−1),while the maximum of Faraday efficiency(FE)is 76.95%±5.51%.This study expands the technical scope of copper-based catalyst preparation and enhances the understanding of the electrocatalytic mechanism of NO_(3)^(−)to NH_(3).

关键词： Cu_(2)O/Cu(OH)_(2)heterostructures electron transfer ammonia synthesis electrocatalysts nitrate

Optimizing urban block morphologies for net-zero energy cities:Exploring photovoltaic potential and urban design prototype

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Building Simulation 2024年第4期17卷 607-624页

作者： Xiaotian geng Dong Xie Zhonghua Gou School of Urban Design Wuhan UniversityWuhanChina

The morphology of urban areas plays a crucial role in determining solar potential,which directly affects photovoltaic capacity and the achievement of net-zero *** study focuses on the City of Melbourne to investigate the utilization of solar energy across different urban densities and proposes optimized *** analysis encompasses blocks with diverse population densities,examining medium and high-density *** utilizing a multi-objective genetic optimization approach,the urban morphology of these blocks is *** findings indicate that low-density blocks exhibit photovoltaic potential ranging from 1 to 6.6 times their total energy *** and high-density blocks achieve photovoltaic potential levels approximately equivalent to 40%-85%of their overall energy ***,significant variations in photovoltaic potential are observed among different urban forms within medium and high-density ***“elevated corners with central valley”prototype is proposed as an effective approach,enhancing the overall photovoltaic potential by approximately 14%.This study introduces novel analytical concepts,shedding light on the intricate relationship between urban morphologies and photovoltaic potential.

关键词： net-zero energy solar energy urban density urban morphology multi-objective optimization photovoltaic potential

Improving Network Availability through Optimized Multipath Routing and Incremental Deployment Strategies

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Computers, Materials & Continua 2024年第7期80卷 427-448页

作者： Wei Zhang Haijun geng Computer Application Teaching and Research Section China University of Labor RelationsBeijing100048China School of Automation and Software Engineering Shanxi UniversityTaiyuan030006China

Currently,distributed routing protocols are constrained by offering a single path between any pair of nodes,thereby limiting the potential throughput and overall network *** approach not only restricts the flow of data but also makes the network susceptible to failures in case the primary path is *** contrast,routing protocols that leverage multiple paths within the network offer a more resilient and efficient *** routing,as a fundamental concept,surpasses the limitations of traditional shortest path first *** not only redirects traffic to unused resources,effectively mitigating network congestion,but also ensures load balancing across the *** optimization significantly improves network utilization and boosts the overall performance,making it a widely recognized efficient method for enhancing network *** further strengthen network resilience against failures,we introduce a routing scheme known as Multiple Nodes with at least Two Choices(MNTC).This innovative approach aims to significantly enhance network availability by providing each node with at least two routing *** doing so,it not only reduces the dependency on a single path but also creates redundant paths that can be utilized in case of failures,thereby enhancing the overall resilience of the *** ensure the optimal placement of nodes,we propose three incremental deployment *** algorithms carefully select the most suitable set of nodes for deployment,taking into account various factors such as node connectivity,traffic patterns,and network *** deployingMNTCon a carefully chosen set of nodes,we can significantly enhance network reliability without the need for a complete overhaul of the existing *** have conducted extensive evaluations of MNTC in diverse topological spaces,demonstrating its effectiveness in maintaining high network availability with minimal path *** results are impressive,sh

关键词： Multipath routing network availability incremental deployment schemes genetic algorithm

Multi-physics multi-scale simulation of unique equiaxed-to-columnar-to-equiaxed transition during the whole solidification process of Al-Li alloy laser welding

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Journal of Materials Science & Technology 2024年第4期171卷 235-251页

作者： Chu Han Ping Jiang Shaoning geng Liangyuan Ren School of Mechanical Science and Engineering Huazhong University of Science&Technology(HUST)Wuhan430074China

In this study,a novel multi-physics multi-scale model with the dilute multicomponent phase-field method in three-dimensional(3D)space was developed to investigate the complex microstructure evolu-tion in the molten pool during laser welding of Al-Li *** accurately compute mass data within both two and three-dimensional computational domains,three efficient computing methods,including central processing unit parallel computing,adaptive mesh refinement,and moving-frame algorithm,were *** was placed on the distinctive equiaxed-to-columnar-to-equiaxed transition phenomenon that occurs during the entire solidification process of Al-Li alloy laser *** results indi-cated that the growth distance of columnar grains that epitaxially grew from the base metal(BM)de-creased as the nucleation rate *** the nucleation rate increased,the morphology of the newly formed grains near the fusion boundary(FB)changed from columnar to equiaxed,and newly formed equiaxed grains changed from having high-order dendrites to no obvious dendrite *** the nucleation rate was sufficiently high,non-dendritic equiaxed grains could directly form near the FB,and there was nearly no epitaxial growth from the ***,simulation results illustrated the com-petition among multiple grains with varying orientations that grow in 3D space near the ***,how equiaxed grain bands develop was *** equiaxed band not only hindered the growth of early columnar grains but also some of its grains could grow epitaxially to form new columnar *** predicted results were in good agreement with experimental measurements and observations.

关键词： Laser welding Al-Li alloy Equiaxed-to-columnar-to-equiaxed transition Multi-physics multi-scale model Multicomponent alloys 3D phase-field model