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成都世界科幻大会病媒生物监测及防制效果评估

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中华卫生杀虫药械 2024年第3期30卷 234-237页

作者：韩江张伟杨万英郭强彭媛成都市郫都区疾病预防控制中心四川成都611730 成都市疾病预防控制中心四川成都610041

目的掌握成都世界科幻大会场馆及接待酒店的病媒生物侵害情况,针对存在的问题及时采取病媒防制措施,保障大会病媒安全并分析总结病媒防制经验,为重大活动保障提供参考。方法在成都世界科幻大会举办前期,于2023年9—10月对涉及的1个场... 详细信息

目的掌握成都世界科幻大会场馆及接待酒店的病媒生物侵害情况,针对存在的问题及时采取病媒防制措施,保障大会病媒安全并分析总结病媒防制经验,为重大活动保障提供参考。方法在成都世界科幻大会举办前期,于2023年9—10月对涉及的1个场馆和5家接待酒店开展3轮病媒生物密度监测以及病媒防制效果评估,分析各场所蜚蠊、蝇、鼠、蚊侵害情况以及防制效果。结果 3轮病媒生物密度监测显示,6个场所的总体蜚蠊粘捕率、蟑迹阳性率、成蝇侵害率均呈显著下降趋势(蜚蠊粘捕率分别为1.74%、0.97%、0.24%;蟑迹阳性率分别为5.15%、2.63%、0.39%;成蝇侵害率分别为3.76%、1.47%、0.00%;P<0.05);所有场所均未捕获到鼠类,室内未查见鼠迹;6个场所的总体诱蚊灯蚊密度、停落指数及路径指数呈现下降趋势;病媒防制效果评估显示,所有场所蚊虫达到密度控制水平A级,蝇及蜚蠊达到密度控制水平B级,酒店A和酒店E鼠类密度控制水平仅达到C级,其余场所鼠类密度控制水平达到B级。结论随着时间不断推进,成都世界科幻大会场馆及接待酒店病媒防制效果持续改善;开展病媒生物密度监测和防制效果评估,可为病媒防制提供科学依据以及客观反映病媒防制成效。

关键词：成都世界科幻大会病媒生物监测控制水平

捐母乳喂养对极低出生体质量早产儿肠道微生物及代谢产物的影响

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中国基层医药 2023年第12期30卷 1867-1870页

作者：季国静杨飞郭婉颖刘会圆张春宇赵燕凤杭州市妇产科医院新生儿科杭州310000

目的观察捐母乳喂养对极低出生体质量早产儿体格发育、肠道微生物环境及代谢产物水平的影响。方法选择2021年6月至2022年12月在杭州市妇产科医院娩出的极低出生体质量早产儿78例为研究对象,采用随机对照临床研究方法,将患儿简单随机化... 详细信息

目的观察捐母乳喂养对极低出生体质量早产儿体格发育、肠道微生物环境及代谢产物水平的影响。方法选择2021年6月至2022年12月在杭州市妇产科医院娩出的极低出生体质量早产儿78例为研究对象,采用随机对照临床研究方法,将患儿简单随机化分为两组,对照组和研究组各39例;对照组予以早产儿配方奶粉喂养,研究组捐母乳喂养。两组均干预1个月,比较喂养期间两组患儿肠道微生物指标、血红蛋白浓度指数、体格生长发育指标、喂养耐受建立时间、全肠道喂养达标时间、住院时间及临床不良预后发生率等。结果喂养14 d、30 d时,研究组乳酸杆菌[(7.18±1.03)1010/g湿粪、(9.23±0.85)1010/g湿粪]、双歧杆菌[(9.78±1.25)1010/g湿粪、(11.25±1.38)1010/g湿粪]均明显高于对照组[(6.29±1.17)1010/g湿粪、(8.75±0.83)1010/g湿粪、(8.97±1.36)1010/g湿粪、(10.41±1.52)1010/g湿粪],研究组喂养耐受建立、全肠道喂养达标时间、住院时间[(13.45±2.86)d、(17.15±4.47)d、(36.39±4.53)d]均明显低于对照组[(19.41±3.22)d、(22.16±5.32)d、(42.18±5.12)d],研究组30 d时肠道组织血红蛋白浓度指数(sTHI)[(0.92±0.27)mmol·L^(-1)·min^(-1)]及临床不良预后发生率(30.76%)明显低于对照组[(1.08±0.35)mmol·L^(-1)·min^(-1)、64.10%],两组比较,差异均有统计学意义(t=3.56、2.52、2.73、2.55、8.64、4.50、5.29、2.26,χ^(2)=8.68,均P<0.05)。结论捐母乳喂养、配方奶粉喂养均可有效促进极低体质量出生早产儿体格发育、神经系统功能发育,但捐母乳喂养对患儿肠道内益生菌定植水平改善作用明显,可进一步促进肠道消化功能发育,辅助控制临床不良预后风险。

关键词：母乳喂养婴儿,出生时低体重婴儿,早产体格发育肠道微生物代谢产物不良预后

成都第31届世界大学生夏季运动会郫都赛区病媒生物密度监测分析

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中华卫生杀虫药械 2024年第5期30卷 451-454页

作者：韩江张伟杨万英郭强彭媛成都市郫都区疾病预防控制中心四川成都611730 成都市疾病预防控制中心四川成都610041

目的分析成都第31届世界大学生运动会(大运会)郫都赛区场馆及周边范围病媒生物侵害情况,总结病媒防制工作经验,为今后重大赛事活动保障提供参考。方法按照《第31届世界大学生夏季运动会病媒生物防制工作方案》的要求,2023年4—8月对大... 详细信息

目的分析成都第31届世界大学生运动会(大运会)郫都赛区场馆及周边范围病媒生物侵害情况,总结病媒防制工作经验,为今后重大赛事活动保障提供参考。方法按照《第31届世界大学生夏季运动会病媒生物防制工作方案》的要求,2023年4—8月对大运会郫都赛区PD、XH和XJ场馆及周边500 m范围进行病媒生物密度监测,其中蚊每月监测2次(上、下旬各1次),鼠、蝇和蜚蠊每月监测1次。结果2023年4—8月PD、XH和XJ场馆及周边范围蚊、蝇密度呈现不同的变化趋势;在鼠类密度监测中,XJ场馆周边范围路径指数最高;在蜚蠊密度监测中,XJ场馆周边范围蜚蠊粘捕率、密度指数、蟑迹阳性率最高;8月各场馆及周边范围蚊、蝇、鼠、蜚蠊密度均控制到较低水平。结论大运会郫都赛区场馆及周边范围受到不同程度的病媒侵害,按照“一馆一策”方针制定病媒防制措施,有助于病媒生物密度控制水平达到相关要求,可为今后重大赛事活动保障提供借鉴。

关键词：成都大运会郫都区病媒生物密度监测

Yolk-shell structure synergistic defect engineering for boosting electromagnetic wave absorption in Co_(9)S_(8)@Humins-derived carbon

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Journal of Materials Science & Technology 2023年第33期164卷 140-149页

作者： Na Liang Zixu Yin Jingyun guo wanying Fang Qi Wang Ge Tian Dong Zhang Huijuan Yue Shouhua Feng State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of PhysicsJilin UniversityChangchun 130012China

Exploring new strategies to incorporate the concepts of green chemistry and defect engineering into new architectures to address the problem of severe electromagnetic wave(EMW)pollution is *** this work,by using a by-product of catalytic conversion of biomass as a carbon source,we prepare two-dimensional(2D)Co_(9)S_(8)-coated humins-derived carbon nanomaterials with a yolk-shell *** EMW attenuation ability is finally optimized by controlling the morphology and defects of the composite material through the pyrolysis *** expected,with the synergy of conductive loss/interfacial polarization and defects regulating,the composite material achieves a reflection loss(RL)value of−51.4 dB in Ku-band and the effective absorption bandwidth(EAB)can be as high as 5.92 GHz(12.08–18.00 GHz)at 1.8 mm ultra-thin coating thickness.A strong absorption capacity in the low-frequency C-band(6.4 GHz)reaches RL value of−49.9 dB and a thickness of 3.50 mm,which grants it the characteristic of convertible microwave absorption from high frequency to low *** account of the facile synthesis and tunable absorption properties,the encouraging findings shed light on exploring waste-turned-microwave absorbents with promising practical applications.

关键词： Yolk-shell structure Electromagnetic wave absorption Sulfide Humins

不同剂量更昔洛韦治疗新生儿先天性巨细胞病毒感染的疗效

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深圳中西医结合杂志 2024年第7期34卷 94-97页

作者：郭佳佳霍婉莹雷冰张彦华郑州大学第三附属医院河南郑州450052

目的:比较不同剂量更昔洛韦治疗新生儿先天性巨细胞病毒感染的疗效及安全性。方法:选取郑州大学第三附属医院2019年2月至2022年2月期间收治的50例新生儿先天性巨细胞病毒感染患儿,依据不同剂量更昔洛韦用药分为小剂量组(6.0 mg·kg^(-1)... 详细信息

目的:比较不同剂量更昔洛韦治疗新生儿先天性巨细胞病毒感染的疗效及安全性。方法:选取郑州大学第三附属医院2019年2月至2022年2月期间收治的50例新生儿先天性巨细胞病毒感染患儿,依据不同剂量更昔洛韦用药分为小剂量组(6.0 mg·kg^(-1))、大剂量组(7.5 mg·kg^(-1)),各25例,比较两组患儿临床症状评分、肝功能、病毒学检查结果、临床疗效、副作用发生情况。结果:两组患儿治疗后发热、呕吐腹泻、黄疸、肝大、原始反射异常评分均低于治疗前,血清谷草转氨酶(AST)、谷丙转氨酶(ALT)、总胆红素(TBIL)水平及人类巨细胞病毒的脱氧核糖核酸(CMV-DNA)、基因拷贝数变异的免疫球蛋白G(CNV-IgG)、基因拷贝数变异的免疫球蛋白M(CNV-IgM)阳性率均低于治疗前,差异具有统计学意义(P0.05);小剂量组患儿的副作用发生率低于大剂量组,差异具有统计学意义(P0.05)。结论:大剂量和小剂量更昔洛韦治疗新生儿先天性巨细胞病毒感染的疗效相当,但小剂量安全性更高。

关键词：先天性巨细胞病毒感染更昔洛韦用药剂量新生儿

青藏高原雅江河谷地带碎块石土强度特性及颗粒破碎分析

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铁道科学与工程学报 2024年第9期21卷 3647-3660页

作者：全志温韬郭威贾文君王熠辉黄德昕史雪晴黄婉滢长江大学地球科学学院湖北武汉430100 湖北长大科技开发有限公司加查县分公司西藏山南856499

碎块石土在西藏等高寒地区广泛分布,其力学性质受粗颗粒含量、干密度及含水率的影响较大,且对评价该区域的堆积层滑坡稳定性十分重要。为探究粗颗粒含量、干密度及含水率对青藏高原雅鲁藏布江河谷地带碎块石土强度和颗粒破碎率等参数的... 详细信息

碎块石土在西藏等高寒地区广泛分布,其力学性质受粗颗粒含量、干密度及含水率的影响较大,且对评价该区域的堆积层滑坡稳定性十分重要。为探究粗颗粒含量、干密度及含水率对青藏高原雅鲁藏布江河谷地带碎块石土强度和颗粒破碎率等参数的影响规律,开展了4种粗颗粒含量、3种干密度和2种含水工况下的碎块石土大直剪试验,分析了剪切过程中的应力变化规律、剪切后的颗粒破碎率及体变特征。结果表明:当试样干密度为1.4g/cm^(3)时,应力应变曲线在高粗颗粒含量(p_(5)≥40%)下没有出现峰值,试样未发生剪切破坏,随着干密度的增大,试样发生剪切破坏的临界粗颗粒含量和竖向压力不断降低;碎块石土的黏聚力c以p_(5)=20%为临界点,随着粗颗粒含量的增大先减小后增大,内摩擦角φ随p_(5)的增大逐渐变大;碎块石土的颗粒破碎率与粗颗粒含量、竖向压力和初始干密度均呈正相关;粗颗粒含量和干密度的增大均会提高试样的界面抗剪强度,降低试样的最终体变量。试样的剪胀性受碎块石相互咬合形成的骨架结构的强度和竖向压力的影响,当σ=100 kPa,p_(5)≥20%时,试样表现出剪胀特性,随着竖向压力的增大,试样由剪胀向剪缩转变;在饱和含水工况下,碎块石土的抗剪强度降低,最终体变量与剪缩量大幅增加。研究成果可为青藏高原碎块石土滑坡稳定性研究提供指导。

关键词：大直剪试验粗颗粒含量抗剪强度指标颗粒破碎率剪胀

A gate-tunable artificial synapse based on vertically assembled van der Waals ferroelectric heterojunction

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Journal of Materials Science & Technology 2022年第33期128卷 239-244页

作者： Yaning Wang wanying Li Yimeng guo Xin Huang Zhaoping Luo Shuhao Wu Hai Wang Jiezhi Chen Xiuyan Li Xuepeng Zhan Hanwen Wang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Material Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Applied Physics Aalto UniversityAaltoFinland School of Information Science and Engineering(ISE) Shandong UniversityQingdao 266237China

Memtransistor,a multi-terminal device that combines both the characteristics of a memristor and a transistor,has been intensively studied in two-dimensional layered materials(2 DLM),which show potential for applications in such as neuromorphic ***,while often based on the migration of ions or atomic defects in the conduction channels,performances of memtransistors suffer from the poor reliability and ***,those known 2 DLM-based memtransistors are mostly constructed in a lateral manner,which hinders the further increasing of the transistor densities per *** now,fabricating non-atomic-diffusion based memtransistors with vertical structure remains ***,we demonstrate a vertically-integrated ferroelectric memristor by hetero-integrating the 2 D ferroelectric materials CuInP_(2)S_(6)(CIPS)into a graphite/CuInP_(2)S_(6)/MoS_(2)vertical *** behaviour and multi-level resistance states were *** synaptic behaviours including excitatory postsynaptic current,paired-pulse-facilitation,and spike-amplitude-dependent plasticity are successfully ***,by applying a gate potential,the memristive behaviour and synaptic features can be effectively gate *** findings pave the way for the realization of novel gate-tunable ferroelectric synaptic devices with the capability to perform complex neural functions.

关键词： van der Waals heterostructures Ferroelectrics Memristor Artificial synapse Neuromorphic computing

Nitrogen transformation processes in soil along a High Arctic tundra transect

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Advances in Polar Science 2023年第2期34卷 105-124页

作者： guo Mengjie WANG Qing ZHANG wanying JIAO Yi SUN Bowen HOU Lijun ZHU Renbin Institute of Polar Environment&Anhui Province Key Laboratory of Polar Environment and Global Change School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of NBC Protection for Civilian Beijing 102205China Terrestrial Ecology Section Department of BiologyCopenhagen UniversityCopenhagenØDK-2100Denmark State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China

Soil nitrogen(N)transformation processes in the High Arctic tundra are poorly understood even though nitrogen is one of the main limiting *** analyzed soil samples collected along a High Arctic tundra transect to investigate spatial variability in key nitrogen transformation processes,functional gene abundances,ammonia-oxidizing archaea(AOA)community structures,and key nitrogen transformation *** potential denitrification rates were higher than the nitrification rates in the soil samples,although nitrification may still regulate N2O emissions from tundra *** nutrient(total carbon,total organic carbon,total nitrogen,and NH_(4)^(+)-N)contents were important determinants of spatial variability in the potential denitrification rates of soil along the tundra *** total sulfurcontent was the main variable controlling potential nitrification processes,probably in association with sulfate-reducing *** nitrate content was the main variable affecting potential dissimilatory nitrate reduction to *** and ammonia-oxidizing bacteria amoA,nirS,and anammox 16S rRNA genes were found in all of the soil *** play more important roles than ammonia-oxidizing bacteria in *** bacteria may utilize NO_(2)^(-)produced through *** analysis indicated that the AOA amoA sequences could be grouped into eight unique operational taxonomic units(OTUs)with a 97%sequence similarity and were affiliated with three group 1.1b *** results indicated that heterogeneous environmental factors(e.g.,the carbon and nitrogen contents of soil)along the High Arctic tundra transect strongly affected the nitrogen transformation rate and relevant functional gene abundances in soil.

关键词： Arctic tundra soil nitrogen transformation nitrification denitrification functional gene abundance ammonia-oxidizing archaea

Light-Emitting Diodes Based on Two-Dimensional Nanoplatelets

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Energy Material Advances 2022年第1期2022卷 320-343页

作者： Yating guo Feng Gao Pan Huang Rong Wu wanying Gu Jing Wei Fangze Liu Hongbo Li Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Sciences Beijing Institute of TechnologyBeijing 100081China

Colloidal semiconductor nanocrystals(NCs)attract significant interest in recent years due to their narrow and tunable emission wavelength in the visible range,as well as high photoluminescence quantum yield(PLQY),which are highly desired in display *** high-quality NCs have been recognized as vital luminescent materials in realizing next-generation display *** further development,NCs with near-unity PLQY have been successfully synthesized through engineering of the core/shell ***,as the external quantum efficiency(EQE)of the nanocrystal light-emitting diodes(LEDs)approaches the theoretical limit of about 20%,the low out-coupling factor proposes a challenge of enhancing the performance of a device when using the spherical ***,the anisotropic NCs like nanoplatelets(NPLs)are proposed as promising solutions to improve the performance of nanocrystal *** this review,we will summarize the synthetic strategies of twodimensional(2D)NPLs at ***,we will introduce fundamental concepts of LEDs,the main approaches to realize LEDs based on nanoplatelets,and the recent ***,the challenges and opportunities of LEDs based on anisotropic NCs are also presented.

关键词： tunable quantum anisotropic