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基于多层土壤湿度数据同化的小流域径流模拟

水电能源科学 2024年第3期42卷 6-10页

作者：黄媛媛祁永靓吴雪梅郭立李红霞四川大学水利水电学院四川成都610065 四川大学山区河流保护与治理全国重点实验室四川成都610065

土壤水分状态在水文循环中起关键作用,对径流预报的准确性影响很大。以美国宾西法尼亚州中部的Shale Hills流域为例,研究多层实测土壤湿度数据同化对径流模拟的作用。首先利用新安江模型对研究区内2008~2012年的日径流进行模拟,同时通... 详细信息

土壤水分状态在水文循环中起关键作用,对径流预报的准确性影响很大。以美国宾西法尼亚州中部的Shale Hills流域为例,研究多层实测土壤湿度数据同化对径流模拟的作用。首先利用新安江模型对研究区内2008~2012年的日径流进行模拟,同时通过集合卡尔曼滤波算法构建基于新安江模型的水文数据同化模型,并设置未同化的开环试验作为对比,研究模型同化土壤湿度对改善径流模拟和土壤水分的能力。模拟结果显示,新安江模型在该流域有较好的适用性;相比于同化前,模型同化多层土壤湿度后径流量相对误差降低了5.2%,纳什效率系数从0.62提高到0.66,土壤含水率的均方根误差从16.4 mm减小到3.0 mm。其次对单层土壤含水率同化结果进行比较,结果表明,下层土壤含水率同化比上层同化对径流模拟作用更明显,但仅加入上层实测土壤含水率同化能够降低下层土壤水模拟的不确定性。研究结果表明同化多层土壤湿度可提高径流模拟精度,同时也能够有效优化土壤水的模拟结果。

关键词：新安江模型径流模拟数据同化多层土壤湿度

醚氧-烷基间隔三离子侧链型PBI碱性膜研究

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现代化工 2024年第3期44卷 97-102,109页

作者：杨睿祯陈婉婷王小舟崔福军贺高红吴雪梅大连理工大学精细化工国家重点实验室膜科学与技术研究开发中心辽宁大连116024 大连理工大学盘锦产业技术研究院辽宁盘锦124221

基于侧链接枝改性合成了一系列具有醚氧-烷基-醚氧链段间隔分布的三阳离子侧链型聚苯并咪唑膜(oat-PBI-x)。侧链中两段柔性的含醚链段有助于亲水通道和氢键网络的形成,促进OH-快速传递,而己烷基间隔段可打破侧链全亲水属性,有效抑制膜... 详细信息

基于侧链接枝改性合成了一系列具有醚氧-烷基-醚氧链段间隔分布的三阳离子侧链型聚苯并咪唑膜(oat-PBI-x)。侧链中两段柔性的含醚链段有助于亲水通道和氢键网络的形成,促进OH-快速传递,而己烷基间隔段可打破侧链全亲水属性,有效抑制膜过度溶胀。在IEC为1.40 mmol/g时膜的综合性能达到最佳。80℃时电导率为144.4 mS/cm,拉伸强度保持在21 MPa,在80℃、1 mol/L KOH溶液中浸泡900 h后电导率保留率为91.7%。将其应用于H_(2)/O_(2)燃料电池,可在1549 mA/cm^(2)的高电流密度下达到611 mW/cm^(2)的峰值功率密度。

关键词：阴离子交换膜聚苯并咪唑多阳离子侧链醚氧键燃料电池

Recent Advances in Asymmetric Structural Composites for Excellent Electromagnetic Interference Shielding: A Review

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Chinese Journal of Polymer Science 2024年第6期42卷 693-710页

作者： Ying Zhou Bai xue Lan Xie Chang-mei wu Qiang Zheng Department of Polymer Materials and Engineering College of Materials and Metallurgy Guizhou University National Engineering Research Center for Compounding and Modification of Polymer Materials National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes State Key Laboratory of Public Big Data Guizhou University Department of Polymer Science and Engineering Zhejiang University

Since electromagnetic pollution is detrimental to human health and the environment, numerous efforts have been successively made to achieve excellent electromagnetic interference shielding effectiveness(EMI SE) via designing the hierarchical structures for electromagnetic interference(EMI) shielding polymer composites. Among the plentiful structures, the asymmetric structures are currently a hot spot, principally categorizing into multi-layered, porous, fibrous, and segregated asymmetric structures, which endows the high EMI shielding performance for polymer composites incorporated with magnetic, conductive, and/or dielectric micro/nano-fillers, due to the “absorption-reflection-reabsorption” shielding mechanism. Therefore, this review provides the retrospection and summary of the efforts with respect to abundant asymmetric structures and multifunctional micro/nano-fillers for enhancing EMI shielding properties, which is conducive to the booming development of polymeric EMI shielding materials for the promising prospect in modern electronics and 5-generation(5G) technology.

关键词： Asymmetric structure Microano functional filler Polymer composite Electromagnetic interference shielding

STAT3基因突变阳性大颗粒淋巴细胞白血病相关纯红细胞再生障碍临床特征及结局研究

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中国实用内科杂志 2024年第4期44卷 321-325页

作者：王纬刘晓庆陈小玉张婷宫跃敏叶宝东吴雪梅孙京男陈曦宋玉华龙启强南京市第二医院南京中医药大学附属南京医院血液科江苏南京210037 南京医科大学第一附属医院江苏省人民医院血液科江苏南京210029 南京医科大学附属江宁医院血液内科江苏南京211199 浙江省中医院血液科浙江杭州310003 苏州大学第二附属医院血液科江苏苏州215004 吉林大学第一医院血液肿瘤中心吉林长春130061

目的探索STAT3基因突变阳性大颗粒淋巴细胞白血病(LGLL)相关纯红细胞再生障碍(PRCA)临床特征和结局。方法纳入2018年1月至2023年7月81例LGLL相关PRCA患者临床资料(登记于中国贫血东部协作组)进行分析。对LGLL相关PRCA患者进行STAT3基因... 详细信息

目的探索STAT3基因突变阳性大颗粒淋巴细胞白血病(LGLL)相关纯红细胞再生障碍(PRCA)临床特征和结局。方法纳入2018年1月至2023年7月81例LGLL相关PRCA患者临床资料(登记于中国贫血东部协作组)进行分析。对LGLL相关PRCA患者进行STAT3基因突变筛选,分析STAT3基因突变阳性患者的临床特征、免疫抑制治疗反应及预后生存。结果21例STAT3突变阳性的LGLL相关PRCA患者,15例(71%)exon 21突变阳性,4例(19%)exon 20突变阳性,1例exon 20和21双突变阳性,1例exon13突变阳性。Y640F为高频突变位点(42.9%)。STAT3突变患者接受环孢素(CsA)治疗的完全反应率(CRR)和总反应率(ORR)分别为31.3%和56.3%,环磷酰胺联合泼尼松(CP)方案在STAT3突变组中的CRR及ORR均高于CsA(53.8%比31.3%,P=0.274;84.6%比56.3%,P=0.130);且复发率更低(77.8%比18.2%,P=0.022)。结论STAT3基因高频突变位于exon 21,最常见位点为Y640F,CP方案疗效较CsA好,复发率低。

关键词： STAT3基因突变大颗粒淋巴细胞白血病纯红细胞再生障碍环孢素环磷酰胺疗效

Clinical and etiological characteristics of community-acquired pneumonia at high altitudes in Tibet, China

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Chinese Medical Journal 2021年第6期134卷 749-751页

作者： Qucuo meilang Ran Li xue-mei wu Ying Shang Pu Ning Jing Bao Qiongda Bianba Zhuoga Pubu Li-Ping Huang Zhan-Cheng Gao Department of Respiratory Medicine Tibet Autonomous Region People’s HospitalLhasaTibet 850000China Department of Respiratory and Critical Care Medicine Peking University People’s HospitalBeijing 100044China

To the Editor:Community-acquired pneumonia(CAP)is one of the most common infectious diseases,causing high morbidity and *** altitudes are characterized by a hypoxic environment with low barometric pressure,increased ultraviolet radiation,and low *** can disturb normal homeostasis of the immune system,especially impairing the function of the T lymphocytes,leading to an increased susceptibility to bacterial *** respiratory symptoms of CAP at high altitudes are similar to that of high-altitude pulmonary edema.

关键词： pneumonia altitude homeostasis

Efficacy of the Dumon? Stent in the Treatment of Airway Gastric Fistula: A Case Series Involving 16 Patients

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中华医学杂志(英文版) 2016年第17期 2119-2120页

作者： Ke Ming-Yao Huang Rui Lin Lian-Cheng Zeng Jun-Li wu xue-mei Department of the Respiratory Centre Xiamen Second Hospital Teaching Hospital of Xiamen Medical University Xiamen Fujian 361000 China

Airway gastric fistula (AGF) is a rare but dangerous complication following esophagectomy for esophageal cancer, with an incidence rate of 0.3–1.9%.[1] For AGF, the primary goal is closure of the fist

关键词： Airway Gastric Fistula Complications Dumon? Stent Efficacy

Mechanical property of cylindrical sandwich shell with gradient core of entangled wire mesh

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Defence Technology（防务技术） 2024年第1期31卷 510-522页

作者： Xin xue Chao Zheng Fu-qiang Lai xue-qian wu Institute of Metal-rubber&Vibration Noise School of Mechanical Engineering and AutomationFuzhou UniversityFuzhou350116China Fujian Metallurgical Industry Design Institute Fuzhou350116China

To explore the wide-frequency damping and vibration-attenuation performances in the application of aerospace components,the cylindrical sandwich shell structure with a gradient core of entangled wire mesh was proposed in this ***,the gradient cores of entangled wire mesh in the axial and radial directions were prepared by using an in-house Numerical Control weaving machine,and the metallurgical connection between skin sheets and the gradient core was performed using vacuum ***,to investigate the mechanical properties of cylindrical sandwich shells with axial or radial gradient cores,quasi-static and dynamic mechanical experiments were carried *** primary evaluations of mechanical properties include secant stiffness,natural frequency,Specific Energy Absorption(SEA),vibration acceleration level,and so *** results suggest that the vibration-attenuation performance of the sandwich shell is remarkable when the high-density core layer is at the end of the shell or abuts the inner *** axial gradient material has almost no influence on the vibration frequencies of the shell,whereas the vibration frequencies increase dramatically when the high-density core layer approaches the ***,compared to the conventional sandwich shells,the proposed functional grading cylindrical sandwich shell exhibits more potential in mass reduction,stiffness designing,and energy dissipation.

关键词： Entangled wire mesh Gradient cylindrical sandwich shell Vacuum brazing Secant stiffness Damping

Some Convergence Properties for Weighted Sums of Martingale Difference Random Vectors

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Acta Mathematica Sinica,English Series 2024年第4期40卷 1127-1142页

作者： Yi wu xue Jun WANG School of Big Data and Artificial Intelligence Chizhou UniversityChizhou 247000P.R.China School of Big Data and Statistics Anhui UniversityHefei 230601P.R.China

Let{X_(ni),F_(ni);1≤i≤n,n≥1}be an array of R^(d)martingale difference random vectors and{A_(ni),1≤i≤n,n≥1}be an array of m×d matrices of real *** this paper,the Marcinkiewicz-Zygmund type weak law of large numb... 详细信息

关键词： Martingale difference random vectors weighted sums Marcinkiewicz–Zygmund type weak law of large numbers complete convergence strong law of large numbers multivariate simple linear regression model

Geographically and Temporally Weighted Regression in Assessing Dengue Fever Spread Factors in Yunnan Border Regions

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Biomedical and Environmental Sciences 2024年第5期37卷 511-520页

作者： ZHU Xiao Xiang WANG Song Wang LI Yan Fei ZHANG Ye wu SU xue mei ZHAO Xiao Tao National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases Chinese Center for Disease Control and PreventionBeijing 102211China Yunnan Institute of Parasitic Diseases Pu’er 665000YunnanChina

Objective This study employs the Geographically and Temporally Weighted Regression(GTWR)model to assess the impact of meteorological elements and imported cases on dengue fever outbreaks,emphasizing the spatial-temporal variability of these factors in border *** We conducted a descriptive analysis of dengue fever’s temporal-spatial distribution in Yunnan border *** annual data from 2013 to 2019,with each county in the Yunnan border serving as a spatial unit,we constructed a GTWR model to investigate the determinants of dengue fever and their spatio-temporal heterogeneity in this *** The GTWR model,proving more effective than Ordinary Least Squares(OLS)analysis,identified significant spatial and temporal heterogeneity in factors influencing dengue fever’s spread along the Yunnan ***,the GTWR model revealed a substantial variation in the relationship between indigenous dengue fever incidence,meteorological variables,and imported cases across different *** In the Yunnan border areas,local dengue incidence is affected by temperature,humidity,precipitation,wind speed,and imported cases,with these factors’influence exhibiting notable spatial and temporal variation.

关键词： Dengue fever Meteorological factor Geographically and temporally weighted regression