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Strong law of large numbers for supercritical superprocesses under second moment condition

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Frontiers of Mathematics in China 2015年第4期10卷 807-838页

作者： Zhen-Qing CHEN Yan-xia REN Renmlng SONg Rui ZHANg Department of Mathematics University of Washington Seattle WA 98195 USA LMAM School of Mathematical Sciences & Center for Statistical Science Peking University Beijing 100871 China Department of Mathematics University of Illinois Urbana IL 61801 USA LMAM School of Mathematical Sciences Peking University Beijing 100871 China

Consider a supercritical superprocess X = {Xt, t 〉~ O} on a locally compact separable metric space （E, m）. Suppose that the spatial motion of X is a Hunt process satisfying certain conditions and that the branching... 详细信息

关键词： Superprocess scaling limit theorem Hunt process spectral gap,h-transform martingale measure

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中国金色藻属四个新记录种的超微结构研究

植物分类学报 2006年第1期44卷 64-71页

作者：胡晓燕殷明焱夏娃曾呈奎中国科学院研究生院北京100039 中国科学院海洋研究所青岛266071

金色藻属Chrysochromulina的种类是海洋浮游植物的重要组成成分。报道了该属在我国的4个新记录种,即盅鳞金色藻ChrysochromulinacymbiumLeadbeater&Manton、毛刺金色藻***、粗柱金色藻***和普氏金色藻***&Manton,并在电子显微镜下观察... 详细信息

金色藻属Chrysochromulina的种类是海洋浮游植物的重要组成成分。报道了该属在我国的4个新记录种,即盅鳞金色藻ChrysochromulinacymbiumLeadbeater&Manton、毛刺金色藻***、粗柱金色藻***和普氏金色藻***&Manton,并在电子显微镜下观察了细胞的超微结构。

关键词：金色藻属超微结构新记录种浮游植物中国

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婴幼儿社区获得性肺炎病原学特征分析

中国病原生物学杂志 2022年第5期17卷 559-562页

作者：苏布德格日乐斯琴格日勒牧兰宝高娃吴春霞内蒙古民族大学附属医院蒙西医结合儿科内蒙古通辽028000

目的研究本地区婴幼儿婴幼儿社区获得性肺炎(CAP)患儿的临床体征及病原学特征,为临床工作者提供参考依据。方法统计本院2016年1月-2020年12月收治的548例CAP患儿临床资料,根据患儿年龄,将其分为婴儿组和幼儿组。回顾性分析患儿的临床症... 详细信息

目的研究本地区婴幼儿婴幼儿社区获得性肺炎(CAP)患儿的临床体征及病原学特征,为临床工作者提供参考依据。方法统计本院2016年1月-2020年12月收治的548例CAP患儿临床资料,根据患儿年龄,将其分为婴儿组和幼儿组。回顾性分析患儿的临床症状与主要体征。采用PHOENIX-100全自动细菌鉴定仪鉴定菌株,应用直接免疫荧光法检测呼吸道病毒抗原,使用间接免疫荧光法检测呼吸道非典型感染病原体IgM抗体。结果婴儿组(≥12个月)共计331例患儿,其中发热98例(29.61%)、腹泻111例(33.53%),皮疹11例(3.32%)。幼儿组(12~36个月)共计217例患儿,其中发热129例(59.45%)、腹泻29例(13.36%),皮疹9例(4.15%)。咳嗽、鼻塞和呼吸急促为CAP婴幼儿常见临床特征,皮疹在各年龄段发生概率均低于5%。发热症状在幼儿组较为常见,腹泻症状在婴儿组较为常见。婴儿组出现湿啰音314例,伴有喘鸣92例。幼儿组出现湿啰音187例,伴有喘鸣55例。婴儿组湿啰音发生率高(P<0.05)。肺炎链球菌在幼儿组检出率较高(P<0.05),肺炎克雷伯菌和金黄色葡萄球菌在婴儿组检出率较高(P<0.05)。呼吸道合胞病毒(RSV)为主要病毒,婴儿组检出率偏高(P<0.05)。幼儿组非典型病原体总检出率高于婴儿组(P<0.05),其中MP为主要非典型病原体。345例阳性病例中,春季检出72例,夏季检出67例,秋季检出94例,冬季检出率112例。结论本地区婴幼儿CAP阳性病例主要为病毒感染,以RSV为主,不同细菌、病毒、非典型病原体在不同年龄分布呈现差异化,病例多发于秋冬季。

关键词：婴幼儿社区获得性肺炎细菌病毒非典型病原体体年龄季节

Trivalent Ni oxidation controlled through regulating lithium content to minimize perovskite interfacial recombination

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Rare Metals 2022年第1期41卷 96-105页

作者： Jin-Jin Zhao xiao Su Zhou Mi Ying Zhang Yan-Jun Hu Hua-Jun guo Yi-Nan Jiao Yu-xia Zhang Yan Shi Wei-Zhong Hao Jing-Wei Wu Yi wa.g Cun-Fa gao guo-Zhong Cao School of Materials Science and Engineering School of Mechanical EngineeringShijiazhuang Tiedao UniversityShijiazhuang 050043China School of Materials Science and Engineering Hebei Key Laboratory of Material Near Net Forming TechnologyHebei University of Science and TechnologyShijiazhuang 050018China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Materials Science and Engineering University of WashingtonSeattleWA 98195-2120USA

Organic–inorganic hybrid perovskite solar cells,one of the most promising photovoltaic devices,have made great progress in their efficiency and preparation *** this study,uniform,highly conductive Li_(n)NiO_(x)(0≤n≤1;0ge of Li *** performance for the perovskite solar cells was enhanced through incorporation of the ion pair of Ni^(3+)-Ni^(2+) as the interfacial *** on the amount of lithium doping,controlled interfacial oxidation was induced by Ni^(3+).The Li_(0.32)NiO_(x)inhibited charge recombination,reduced the defect density,and enhanced the photocurrent density.A maximum power conversion efficiency of 20.44%was obtained by Li_(0.32)NiO_(x).Further,in the long-term,in-air stabilities of unencapsulated Li_(n)-NiO_(x) perovskite solar cells were demonstrated.

关键词： Lithium ions Ni^(3+) Oxidized defect Photocurrent Perovskite solar cells

Hydrological cycle and water resources in a changing world:A review

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geography and Sustainability 2021年第2期2卷 115-122页

作者： Dawen Yang Yuting Yang Jun xia State Key Laboratory of Hydroscience and Engineering Department of Hydraulic EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China Hubei Provincial Key Lab of water System Science for Sponge City Construction Wuhan UniversityWuhan 430072China

water is the fundamental natural resource that supports life,ecosystems and human *** studying the water cycle is important for sustainable *** the context of global climate change,a better under-standing of the water cycle is *** study summarises current research and highlights future directions of water science from four perspectives:(i)the water cycle;(ii)hydrologic processes;(iii)coupled natural-social water systems;and(iv)integrated watershed *** should be placed on understanding the joint impacts of climate change and human activities on hydrological processes and water resources across temporal and spatial *** the interactions between land and atmosphere are keys to addressing this *** systematic approaches should be developed for large basin *** for focused research include:variations of cryosphere hydrological processes in upper alpine zones;and human activities on the wa-ter cycle and relevant biogeochemical processes in middle-lower *** the water cycle is naturally coupled with social characteristics across multiple scales,multi-process and multi-scale models are ***-drological studies should use this new paradigm as part of water-food-energy frontier *** will help to promote interdisciplinary study across natural and social sciences in accordance with the United Nation’s sustainable development goals.

关键词： scales cycle watershed

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低频补偿TEM喇叭天线的仿真与测试

现代雷达 2010年第3期32卷 73-76页

作者：夏景孔娃王刚江苏大学通信工程系江苏镇江212013

以超宽带窄脉冲辐射为应用背景,通过添加补偿回路并调整回路的大小,设计了一种具有低频补偿的超宽带TEM喇叭天线。利用FDTD方法对天线结构进行了仿真,分析了不同补偿回路大小时TEM喇叭天线的S11参数、相位特性、辐射带宽及前后向辐射场... 详细信息

以超宽带窄脉冲辐射为应用背景,通过添加补偿回路并调整回路的大小,设计了一种具有低频补偿的超宽带TEM喇叭天线。利用FDTD方法对天线结构进行了仿真,分析了不同补偿回路大小时TEM喇叭天线的S11参数、相位特性、辐射带宽及前后向辐射场等参数,得到了在大于400 MHz频带范围内S11参数低于-10 dB的天线结构。制作天线原型,并进行了实际测试,频域S11参数测试结果与仿真结果基本吻合。通过对时域波形的分析可知,该天线具有较高的波形保真度。

关键词：低频补偿超宽带喇叭天线时域有限差分

Tetramethylpyrazine stimulates cystic fibrosis transmembrane conductance regulator-mediated anion secretion in distal colon of rodents

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World Journal of gastroenterology 2005年第27期11卷 4173-4179页

作者： Qiong He Jin-xia Zhu Ying Xing Lai-Ling Tsang Ning Yang Dewi Kenneth Rowlands Yiu-wa Chung Hsiao-Chang Chan Department of Physiology Medical School Zhengzhou University Zhengzhou 450052 Henan Province China Epithelial Cell Biology Research Center Department of PhysiologyFaculty of Medicine The Chinese University of Hong Kong ShatinHong Kong China

AIM: To investigate the effect of tetramethylpyrazine (TMP), an active compound from Ligustiun Wollichii Franchat, on electrolyte transport across the distal colon of rodents and the mechanism ***: The short-circuit current (ISC) technique in conjunction with pharmacological agents and specific inhibitors were used in analyzing the electrolyte transport across the distal colon of rodents. The underlying cellular signaling mechanism was investigated by radioimmunoassay analysis (RIA) and a special mouse model of cystic ***: TMP stimulated a concentration-dependent rise in ISC, which was dependent on both Cl- and HCO3-, and inhibited by apical application of diphenylamine-2,2'-dicarboxylic acid (DPC) and glibenclamide, but resistant to 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid disodium salt hydrate (DIDS). Removal of Na+ from basolateral solution almost completely abolished the ISC response to TMP, but it was insensitive to apical Na+ replacement or apical Na+channel blocker, amiloride. Pretreatment of colonic mucosa with BAPTA-AM, a membrane-permeable selective Ca2+chelator, did not significantly alter the TMP-induced ISC. No additive effect of forskolin and 3-isobutyl-1-methylxanthine (IBMX) was observed on the TMP-induced ISc, but it was significantly reduced by a protein kinase A inhibitor, *** results showed that TMP (1 mmol/L) elicited a significant increase in cellular cAMP production, which was similar to that elicited by the adenylate cyclase activator, forskolin (10 μmol/L). The TMP-elicited ISC as well as forskolin- or IBMX-induced ISC were abolished in mice with homozygous mutation of the cystic fibrosis transmembrane conductance regulator (CFTR) presenting defective CFTR functions and ***: TMP may stimulate cAMP-dependent and CFTR-mediated Cl- and HCO3- secretion. This may have implications in the future development of alternative treatment for constipation.

关键词：四甲基砒嗪胆囊纤维化横跨膜电导校准方法结肠疾病

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基于最大流增流关键边的疏散逆向路段优化

交通运输系统工程与信息 2016年第3期16卷 194-199页

作者：高明霞洪娃艺司倩倩兰州交通大学交通运输学院兰州730070

逆向车道作为提高路网疏散通行能力的一种交通组织方法,已在疏散交通组织中得到了广泛应用.本文采用网络优化技术,研究疏散交通组织中逆向车道设置路段的选择问题.将道路网抽象为有向网络,给出网络最大流增流关键边的定义,通过寻找网络... 详细信息

逆向车道作为提高路网疏散通行能力的一种交通组织方法,已在疏散交通组织中得到了广泛应用.本文采用网络优化技术,研究疏散交通组织中逆向车道设置路段的选择问题.将道路网抽象为有向网络,给出网络最大流增流关键边的定义,通过寻找网络最大流增流关键边、次关键边等,确定路网中实行逆向车道管理的备选路段.在求解最大流问题的最大容量路算法基础上,给出了在有向网络中寻找最大流增流关键边的改进算法,通过一个数值算例进行分析,并对计算结果进行仿真验证.结果表明,在产生大量交通需求的大规模交通疏散中,通过对最大流增流关键边所对应路段进行逆向管理扩容,能够有效压缩疏散时间.

关键词：城市交通逆向路段选择最大流增流关键边交通疏散改进算法

20世纪以来马克思恩格斯生态伦理思想研究:回顾与思考

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华北电力大学学报（社会科学版） 2017年第2期 96-100页

作者：刘海霞王萍兰州理工大学马克思主义学院甘肃兰州730050

马克思恩格斯生态伦理思想在马克思主义理论中占有重要地位,是马克思主义生态思想体系不可分割的组成部分,十八届五中全会提出的绿色发展理念就是马克思恩格斯生态伦理思想与时代发展有机结合的充分体现。以时间为线索,纵向梳理国内外... 详细信息

马克思恩格斯生态伦理思想在马克思主义理论中占有重要地位,是马克思主义生态思想体系不可分割的组成部分,十八届五中全会提出的绿色发展理念就是马克思恩格斯生态伦理思想与时代发展有机结合的充分体现。以时间为线索,纵向梳理国内外学术界对马克思恩格斯生态伦理思想的研究成果,指出目前研究的不足,以期为未来研究马克思恩格斯生态伦理思想提供借鉴,用其批判精神和方法论为当前生态问题寻找切实可行的解决方法。

关键词：马克思恩格斯生态伦理研究回顾思考