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基于计算机仿真的复合光功能树脂的设计

合成树脂及塑料 2023年第5期40卷 36-39页

作者：周侃刘金濮阳职业技术学院河南濮阳457000 河南省计量标准和产品质量检验检测中心河南郑州450008

基于计算机仿真技术,结合蒙特卡罗算法和光学理论,研究了荧光粒子粒径和用量对复合光功能树脂光通量、相关色温、光子平均自由程和色坐标等的影响规律。结果表明:复合光功能树脂的光通量随着荧光粒子粒径的增大先升高后降低,相关色温和... 详细信息

基于计算机仿真技术,结合蒙特卡罗算法和光学理论,研究了荧光粒子粒径和用量对复合光功能树脂光通量、相关色温、光子平均自由程和色坐标等的影响规律。结果表明:复合光功能树脂的光通量随着荧光粒子粒径的增大先升高后降低,相关色温和光子平均自由程则由于粒子数目降低而逐渐升高,在粒径为9μm时具有最大光通量(150.69 lm);复合光功能树脂的光通量随着荧光粒子用量的增加先升高后降低,相关色温和光子平均自由程则由于粒子数目升高而逐渐降低,在荧光粒子质量分数为8.5%时具有最大光通量(149.26 lm)。进一步结合色坐标与黑体辐射曲线的相对位置得到荧光粒子最佳粒径为12μm,最佳用量为6.0%(w),此时对应色坐标x=0.379 1,y=0.383 2,相关色温4 588 K,光通量144.95 lm。

关键词：计算机仿真复合光功能树脂光通量相关色温光子平均自由程色坐标

Prevalence and Influencing Factor Analysis of Typhoid/Paratyphoid Fever—China,2011-2020

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China CDC weekly 2024年第21期6卷 493-498页

作者： Shumei Huang Meiying Yan Biao kan School of Public Health Shandong UniversityJinan CityShandong ProvinceChina National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina

Introduction:Over the last 12 years,there has been a consistent decline in the cases of typhoid/paratyphoid fever in *** the epidemiological patterns of these diseases in various provincial-level administrative divisions(PLADs)and examining potential influencing factors can provide crucial information for implementing successful control ***:In this study,we analyzed the cases and incidence rates of typhoid/paratyphoid fever reported in various PLADs of China from 2011 to 2022,along with exploring potential influencing *** initially studied spatial shifts in the incidence rates through centroid shift *** variations in typhoid/paratyphoid fever onset were examined using *** autocorrelation analysis was utilized to understand the spatial correlations among different *** assess potential factors,we utilized a generalized estimating equations model that integrated spatial lag effects and sequence comparison ***:The study identified significant geographical clustering of typhoid/paratyphoid fever cases in southwestern China.A decrease in incidence rates in the west resulted in a movement of the disease center towards the *** incidence occurred during warmer seasons,highlighting the seasonal pattern of the *** such as meteorological conditions and socioeconomic status were probable influencers of typhoid/paratyphoid ***:The geographical and temporal spread of typhoid/paratyphoid fever can be impacted by meteorological and socioeconomic *** economic conditions,particularly in regions with high disease prevalence,could aid in the prevention and management of these fevers.

关键词： prevention utilized meteorological

Developing silicon-based photocathodes for CO_(2) conversion

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Science China Chemistry 2024年第6期67卷 1904-1921页

作者： Weijie Zhuang Miao kan Tao Meng Jinlong Zhang Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China Shanghai Engineering Research Center for Multimedia Environmental Catalysis and Resource Utilization East China University of Science and TechnologyShanghai200237China

Photoelectrochemical(PEC)conversion of CO_(2) presents a promising avenue for solar-driven chemical fuel production,with silicon emerging as a cost-effective and high-light-absorbing material pivotal to this *** at exploring opportunities for industrializing PEC CO_(2) reduction(PEC-CO_(2)R)by minimizing reaction energy consumption,enhancing reaction efficiency and selectivity,this review summarizes recent advancements in developing Si-based photocathodes for PEC-CO_(2)*** outlines the fundamental principles,advantages,and limitations of Si photocathodes with key performance *** on this understanding,the strategies to enhance the performance of the PEC-CO_(2)R system,including light absorption,charge separation,and catalytic reactions are categorized as the interfacial modification,active site decoration,and protective layer *** design ideas of this advantageous three-layer structure in promoting the efficiency,stability,and selectivity have been ***,this review scrutinizes the influence of the photocathodic chemical *** review consolidates the mechanism insights and notable breakthroughs of various fuel generation processes within Si-based PEC-CO_(2)R *** this wealth of information offers an up-to-date perspective on the dynamic developments in silicon-based PEC-CO_(2) conversion and underscores the promising pathways toward the sustainable fuel synthesis from pollutant CO_(2).

关键词： photoelectrochemistry solar fuels silicon photocathodes carbon dioxide reduction microenvironment

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肺癌合并达松威尔拟诺卡菌肺部感染1例

现代医药卫生 2024年第17期40卷 2942-2944,2947页

作者：和倩管勤朝朱高沣徐文浩沈文娟周刊张丽李智管风云顾伟云南省传染病临床医学分中心/云南省教育厅感染性疾病重点实验室/大理大学第一附属医院感染科云南大理671000 武汉科技大学附属孝感医院重症医学科湖北孝感432000 大理大学第一附属医院儿科云南大理671000 孝感市第一人民医院放射影像科湖北孝感432000

拟诺卡菌是一种罕见的机会性致病菌,随着器官移植、肿瘤患者增多及临床诊疗水平和实验室技术的提高,有关拟诺卡菌感染的文献报道日益增多,但由达松威尔拟诺卡菌引起的肺部感染文献报道较少见。肺癌合并达松威尔拟诺卡菌肺部感染更是较... 详细信息

拟诺卡菌是一种罕见的机会性致病菌,随着器官移植、肿瘤患者增多及临床诊疗水平和实验室技术的提高,有关拟诺卡菌感染的文献报道日益增多,但由达松威尔拟诺卡菌引起的肺部感染文献报道较少见。肺癌合并达松威尔拟诺卡菌肺部感染更是较为罕见,因其临床表现和影像学无特异性,细菌培养难度大,容易漏诊、误诊,且患者预后较差。大理大学第一附属医院收治1例肺癌合并达松威尔拟诺卡菌肺部感染患者,通过化疗联合磺胺甲恶唑/甲氧苄啶、莫西沙星抗感染治疗后病情好转,复习既往相关文献,以期提高临床医生对该病的认识。

关键词：肺肿瘤达松威尔拟诺卡菌感染病例报告

Temperature-controlled DCP Fluorescent Probe Based on Hydrogel-immobilized Quantum Dots Composite

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 931-936页

作者：童伊琳杨坤 HAN Xuecai YU kan BAO Jiaqi Faculty Information Science and Technology Wenhua CollegeWuhan 430074China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430074China Yangtze Optical Fibre and Cable Joint Stock Limited Company Wuhan 430074China

A composite was created by incorporating the quantum dot-enhanced SiO_(2)nanoparticles within this *** on this composite,a temperature-controlled fluorescent probe for DCP was developed.A meticulous examination of this probe revealed its attributes and factors affecting its *** using temperature modulation,the probe was adept at detecting DCP concentrations ranging between 1.0×10^(-6)and 9.0×10^(-6)mol/*** a probe offers remarkable selectivity,repeatability,and robust stability,so that the detection of DCP can be carried out at different temperatures,and a fast,reliable,sensitive and low-cost intelligent detection method is realized.

关键词： temperature-controlled fluorescent probe hydrogel-immobilized quantum dots composite DCP

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信息不完全情况下新股发行定价的选择及效率

统计研究 2000年第11期17卷 34-38页

作者：施锡铨周侃上海财经大学

This paper presents a game model in which insiders,selling stock in both the initial public offerings and the secondary market,have private information about their firm’s asset qualities,and outside investors only know the quality distribution.A pooling equilibrium is always resulted from large information asymmetry inherent in Chinese stock primary market.

关键词：信息不完全博弈新股发行定价中国证券市场

Quantitative effect of kerogen type on the hydrocarbon generation potential of Paleogene lacustrine source rocks,Liaohe Western Depression,China

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Petroleum Science 2024年第1期21卷 14-30页

作者： Sha-Sha Hui Xiong-Qi Pang Fu-Jie Jiang Chen-Xi Wang Shu-Xing Mei Tao Hu Hong Pang Min Li Xiao-Long zhou kan-Yuan Shi State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China Exploration and Development Research Institute PetroChina Liaohe Oilfield CompanyPanjin 124010LiaoningChina

Kerogen types exert a decisive effect on the onset and capacity of hydrocarbon generation of source *** source rocks in the Liaohe Western Depression are characterized by thick deposition,high total organic carbon(TOC)content,various kerogen types,and a wide range of thermal ***,their hydrocarbon generation potential and resource estimation can be *** this study,geochemical tests,numerical analysis,hydrocarbon generation kinetics,and basin modeling were integrated to investigate the differential effects of kerogen types on the hydrocarbon generation potential of lacustrine source *** hydrocarbon generation and expulsion(HGE)models of different kerogen types were established quantitatively upon abundant Rock-Eval/TOC/vitrinite reflectance(R_(o))*** sets of good-excellent source rocks deposited in the fourth(Es4),third(Es3),and first(Es1)members of Paleogene Shahejie Formation,are predominantly types I-II_(1),II_(1)-II_(2),and II-III,*** activation energy of types I-II_(2)kerogen is concentrated(180-230 kcal/mol),whereas that of type III kerogen is widely distributed(150-280 kcal/mol).The original hydrocarbon generation potentials of types I,II_(1),II_(2),and III kerogens are 790,510,270,and 85 mg/g TOC,*** Ro values of the hydrocarbon generation threshold for type I-III source rocks gradually increase from 0.42%to 0.74%,and Ro values of the hydrocarbon expulsion threshold increase from 0.49%to 0.87%.Types I and II_(1)source rocks are characterized by earlier hydrocarbon generation,more rapid hydrocarbon expulsion,and narrower hydrocarbon generation windows than types II_(2)and III source *** kerogen types also affect the HGE history and resource *** types(conventional,tight,and shale oil/gas)and three levels(realistic,expected,and prospective)of hydrocarbon resources of different members in the Liaohe Western Depression are *** suggest that t

关键词： Kerogen type Hydrocarbon generation potential Lacustrine source rocks Liaohe western depression

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钢管混凝土柱-RC梁平面框架耐火性能分析

工程力学 2014年第S1期31卷 41-45,50页

作者：周侃韩林海宋天诣清华大学土木工程系北京100084 西悉尼大学基础设施工程研究院

建立了外荷载和升、降温火灾共同作用下钢管混凝土柱-钢筋混凝土梁平面框架结构的有限元分析模型,用已有试验数据对模型进行了验证。在有限元模型基础上,对钢管混凝土柱-钢筋混凝土梁平面框架在ISO-834标准升、降温火灾下的力学性能进... 详细信息

建立了外荷载和升、降温火灾共同作用下钢管混凝土柱-钢筋混凝土梁平面框架结构的有限元分析模型,用已有试验数据对模型进行了验证。在有限元模型基础上,对钢管混凝土柱-钢筋混凝土梁平面框架在ISO-834标准升、降温火灾下的力学性能进行了分析,研究了梁荷载比、柱荷载比和升温时间比等参数的影响规律。分析结果表明该组合框架不仅会在升温过程中破坏,也会在降温过程中破坏。该组合框架是否会在降温段发生破坏,跟梁荷载比、柱荷载比和升温时间比有关。

关键词：钢管混凝土柱钢筋混凝土梁组合框架火灾耐火性能

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国土空间管控的方法与途径

地理研究 2019年第10期38卷 2527-2540页

作者：周侃樊杰盛科荣中国科学院地理科学与资源研究所北京100101 中国科学院区域可持续发展分析与模拟重点实验室北京100101 中国科学院大学资源与环境学院北京100049 山东理工大学经济学院淄博255012

国土空间管控是对国土空间各类开发保护活动的科学谋划与管理安排,是进行国土空间宏观调控和微观管理的重要政策工具。探讨以地域功能和资源环境承载力为科学基点的国土空间管控体系框架,并以福建省和贵州省六盘水市为例,解析“三区三... 详细信息

国土空间管控是对国土空间各类开发保护活动的科学谋划与管理安排,是进行国土空间宏观调控和微观管理的重要政策工具。探讨以地域功能和资源环境承载力为科学基点的国土空间管控体系框架,并以福建省和贵州省六盘水市为例,解析“三区三线”协同划定和国土开发强度并测算两个国土空间管控中技术难点的解决方法,在此基础上,提出以功能管控和参数管控为核心的多尺度、多时序国土空间管控途径。研究发现:①功能管控以主体功能区划和“三区三线”划定方案为基础,按照四类主体功能定位、三类空间(生态、农业和城镇空间)、六类分区(生态保护红线及一般生态区、永久基本农田及一般农业区、城镇开发边界及城镇预留区)以及N类建设和非建设类用途分层级实施;②参数管控则以国土开发强度为关键目标参数,实施基于总量-目标和过程-增幅双控的阈值管控,以及基于上限和下限双控的分类型管控途径,旨在实现各类空间内和区域整体的生产、生活、生态“三生”结构均衡协调,促进形成高质量、可持续的国土空间开发保护格局。

关键词：国土空间管控国土开发强度资源环境承载力地域功能 “三区三线” 多尺度