检索结果-南通市图书馆

Generalized Weighted Morrey Estimates for Marcinkiewicz Integrals with Rough Kernel Associated with Schrodinger Operator and Their Commutators

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series b 2020年第1期41卷 77-98页

作者： Ferit GUrbUZ Faculty of Education Department of Mathematics EducationHakkari UniversityHakkari 30000Turkey

Let L =-△+V(x) be a Schrodinger operator, where △ is the Laplacian on R^n,while nonnegative potential V(x) belonging to the reverse Holder class. The aim of this paper is to give generalized weighted Morrey estimates for the boundedness of Marcinkiewicz integrals with rough kernel associated with Schrodinger operator and their ***, the boundedness of the commutator operators formed by bMO functions and Marcinkiewicz integrals with rough kernel associated with Schrodinger operators is discussed on the generalized weighted Morrey spaces. As its special cases, the corresponding results of Marcinkiewicz integrals with rough kernel associated with Schrodinger operator and their commutators have been deduced, respectively. Also, Marcinkiewicz integral operators, rough Hardy-Littlewood(H-L for short) maximal operators, bochner-Riesz means and parametric Marcinkiewicz integral operators which satisfy the conditions of our main results can be considered as some examples.

关键词： Marcinkiewicz operator Rough kernel Schrodinger operator generalized weighted Morrey space Commutator bMO

在线全文

学校读者我要写书评

暂无评论

聚丙烯酰胺/蒙脱土复合材料结构研究

高分子材料科学与工程 2005年第4期21卷 201-204页

作者：高德玉 rb-海曼 b-托马斯李红刘宇光侯静郑辉倪靖滨黑龙江省科学院技术物理研究所黑龙江哈尔滨150086 德国弗莱堡矿业大学黑龙江大学黑龙江哈尔滨150080

用红外(FT-IR),X射线衍射(XRD),核磁共振(NMR,13C,27Al,29Si)对电子束和紫外辐照制备的纳米结构聚丙烯酰胺/蒙脱土复合材料进行了表征。结果表明,丙烯酰胺以双分子层嵌入蒙脱土层间形成复合体,使蒙脱土层距由1.25nm增大到2.09nm。在复... 详细信息

用红外(FT-IR),X射线衍射(XRD),核磁共振(NMR,13C,27Al,29Si)对电子束和紫外辐照制备的纳米结构聚丙烯酰胺/蒙脱土复合材料进行了表征。结果表明,丙烯酰胺以双分子层嵌入蒙脱土层间形成复合体,使蒙脱土层距由1.25nm增大到2.09nm。在复合材料中丙烯酰胺有三种形式:嵌入蒙脱土层间,通过氢键结合在蒙脱土表面和“自由”聚合物。

关键词：蒙脱土聚丙烯酰胺纳米复合材料

Spatial Zonation and Diversity of bivalves and Gastropods in Mangrove Forests of Casiguran, Aurora, Philippines

在线全文

学校读者我要写书评

暂无评论

Open Journal of Ecology 2021年第10期11卷 645-663页

作者： Maria Cristina b. Cañada Eutiquio L. Rotaquio, Jr. rb J. Gallego Department of Graduate Studies Aurora State College of Technology Baler Aurora Philippines

This study generally aimed to determine the spatial zonation and diversity of bivalves and gastropods in mangrove forest of Cozo, Esteves and Tinib in Casiguran, Aurora. Specifically, this aimed to determine the species composition and distribution, and determine the relationship between spatial zonation and diversity of bivalves and gastropods as influenced by ecological factors such as vegetation, soil texture, organic matter, soil salinity, and soil pH. A total of 22 taxa comprising eight species of bivalves and 14 species of gastropods were identified. The high tidal zone of Esteves had high diversity (0.66) of bivalve species compared to other tidal zones and areas. On the other hand, the diversity of gastropods was almost equal in the middle tidal zones of Cozo (0.60), Esteves (0.57), and Tinib (0.42). In terms of bivalve species’ density and abundance, Dendostrea folium was the most dense and abundant in the low tidal zone of Cozo (253,333 ind.ha−1 or 25 ind.m2-1, 97.44%) while Gafrarium tumidum in the low tidal zones of Esteves (46,666 ind.ha−1 or 4 ind.m2-1, 73.68%) and Tinib (126,666 ind.ha−1 or 12 ind.m2-1, 50%). In terms of gastropod species’ density and abundance, Cerithidea cingulata was the most dense and abundant in the low tidal zone (666,666 indrap;">

乘积广义局部Morrey空间上由多线性分数次积分算子生成的多重次线性算子和交换子（英文）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

数学进展 2018年第6期47卷 855-880页

作者： Ferit Gürbüz 哈卡里大学教育学院数学教育系土耳其哈卡里30000

本文在调和分析中大多数算子都满足的一般尺度条件下,得到了乘积广义局部Morrey空间上由多线性分数次积分算子生成的特定多重次线性算子的有界性.还证明了由局部Campanato函数和多线性分数次积分算子生成的多线性算子的交换子在乘积广... 详细信息

本文在调和分析中大多数算子都满足的一般尺度条件下,得到了乘积广义局部Morrey空间上由多线性分数次积分算子生成的特定多重次线性算子的有界性.还证明了由局部Campanato函数和多线性分数次积分算子生成的多线性算子的交换子在乘积广义局部Morrey空间上有界.

关键词：多重次线性算子多线性分数次积分算子交换子广义局部Morrey空间局部Campanato空间

在线全文

学校读者我要写书评

暂无评论

大脑告诉眼睛的东西

科学（中文版） 1990年第8期 42-48页

作者： b.,rb,Jr 周劲松

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

人类感染新型H7N9禽流感病毒

北京医学 2013年第6期35卷 487-488页

作者：李侗曾 Gao rb Cao b Hu YW 首都医科大学附属北京佑安医院感染科 100069

2013年4月11日，《新英格兰医学杂志》在线发表了来自中国疾控中心、上海公共卫生临床中心、上海市第五人民医院、上海疾控中心、安徽疾控中心等单位的中国科学家的最新研究成果《人感染新型H7N9禽流感病毒》。介绍了我国科学家发现人感... 详细信息

2013年4月11日，《新英格兰医学杂志》在线发表了来自中国疾控中心、上海公共卫生临床中心、上海市第五人民医院、上海疾控中心、安徽疾控中心等单位的中国科学家的最新研究成果《人感染新型H7N9禽流感病毒》。介绍了我国科学家发现人感染H7N9禽流感病毒的重要成果和意义．

关键词：禽流感病毒人类感染上海市第五人民医院中国疾控中心中国科学家医学杂志公共卫生英格兰

A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline Mg alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第5期11卷 1656-1671页

作者： X.Z.Jin W.C.Xu D.b.Shan b.Guo b.Jin M.T.Pérez-Prado National Key Laboratory for Precision Hot Processing of Metals&School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001PR China IMDEA Materials Institute C/Eric Kandel2GetafeMadrid 28906Spain Advanced Composites Simulation Lab University of Southern CaliforniaLos AngelesCA 90089U.S.A M.C.Gill Composites Center University of Southern CaliforniaLos AngelesCA 90089U.S.A

This work aims to understand the inefficiency of nanoprecipitates to strengthen a weakly textured,polycrystalline Mg-Gd-Y-Zr *** experimental micromechanical approach consisting on micropillar compression combined with analytical electron microscopy is put in place to analyze the effect of nanoprecipitation on soft and hard basal slip and twinning in individual grains with different *** study shows that,in grains that are favorably oriented for basal slip(“soft”basal slip),aging leads to extreme localization due to the ability of basal dislocations to shear the nanoparticles,resulting overall in the softening of basal ***,in grains in which the c-axis is almost perpendicular to the compression axis,prismatic slip dominates deformation in the solid solution state and nanoprecipitation favors twinning due to the concomitant lattice solute ***,in grains oriented with their c-axis making an angle of about 5-7°with respect to the compression axis,which deform mainly by“hard”basal slip,precipitation leads to the strengthening of basal systems in the absence of obvious *** work reveals that the poor hardening response of the polycrystalline alloy is related to the capability of basal dislocations to shear the nanoparticles,in the absence of Orowan looping events,and to the associated basal slip localization.

关键词： Magnesium Precipitation basal slip Particle shearing Slip localization

Heparin resistance in severe thermal injury:a prospective cohort study

在线全文

学校读者我要写书评

暂无评论

burns & Trauma 2021年第1期9卷 157-169页

作者： Liam D Cato benjamin bailiff Joshua Price Christos Ermogeneous Jon Hazeldine William Lester Gillian Lowe Christopher Wearn Jonathan rb bishop Janet M Lord Naiem Moiemen Paul Harrison Scar Free Foundation birmingham Centre for burns Research University Hospitals Birmingham Foundation TrustQueen Elizabeth Hospital BirminghamMindelsohn WayBirminghamB152WBUK Department of Haematology University Hospitals Birmingham Foundation TrustMindelsohnWayBirminghamB152WBUK Institute of Inflammation and Ageing University of BirminghamBirminghamB152TTUK NIHR Surgical Reconstruction and Microbiology Research Centre University Hospitals Birmingham Foundation TrustMindelsohn WayBirminghamB152WBUK

background:Low molecular-weight heparin(LMWH)is routinely administered to burn patients for *** studies have reported heparin resistance,yet the mechanism(s)and prevalence have not been systematically *** hypothesized that nucleosomes,composed of histone structures with associated DNA released from injured tissue and activated immune cells in the form of neutrophil extracellular traps(NETs or NETosis),neutralize LMWH resulting in suboptimal anticoagulation,assessed by reduction in anti-factor Xa ***:blood was sampled from>15%total body surface area(TbSA)burn patients receiving LMWH on days 5,10 and *** anti-factor Xa(AFXa)activity,anti-thrombin(ATIII)activity,cellfree DNA(cfDNA)levels and nucleosome levels were *** effects regression was adjusted for multiple confounders,including injury severity and ATIII activity,and was used to test the association between nucleosomes and ***:A total of 30 patients with severe burns were *** TbSA 43%(SD 17).Twentythree(77%)patients were affected by heparin resistance(defined by AFXa activitybserved at all doses,at 8000 IU no samples were heparin *** levels were negatively correlated with AFXa(r=−0.29,p=0.050)consistent with the *** final model,with peak AFXa as the response variable,was adjusted for nucleosome levels(p=0.0453),ATIII activity(p=0.0053),LMWH dose pre-sample(p=0.0049),drug given(enoxaparin or tinzaparin)(p=0.03),and other confounders including severity of injury,age,gender,time point of ***:Heparin resistance is a prevalent issue in severe *** levels were increased post-burn,and showed an inverse association with AFXa consistent with the hypothesis that they ma

关键词： burn Heparin resistance Low molecular-weight heparin Nucleosomes Neutrophil extracellular traps Factor-Xa Thrombosis Enoxaparin NETosis

Cluster sampling methodology to evaluate immunization coverage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Methodology 2024年第3期14卷 78-89页

作者： Aishwarya Sharma rb Jain Jitesh Satija Aditi Sharma Avani Sharma Sudhir Shekhawat Department of Community Medicine School of Medical Sciences&ResearchSharda UniversityGreater Noida 201306UPIndia Department of Community Medicine World College of Medical Sciences&ResearchJhajjar 124103HaryanaIndia Department of Community Medicine ESIC Medical College&HospitalFaridabad 121012HaryanaIndia Department of Community Medicine Hamdard Institute of Medical Sciences&ResearchNew Delhi 110062India Department of Community Medicine Pt.B.D.Sharma Post Graduate Institute of Medical SciencesRohtak 124001HaryanaIndia Independent biostatistician Ghaziabad 201014UPIndia

bACKGROUND Immunization is a key component of primary health care and an indisputable human *** are critical to the prevention and control of infectious disease *** coronavirus disease 2019(COVID-19)pandemic and associated disruptions over the past two years have strained the health systems,with many children missing out on essential childhood *** To evaluate the immunization coverage among 12-23-month-old children in the rural areas of Community Health Centre(CHC)Dighal and to determine the factors influencing the existing immunization *** A coverage evaluation survey was conducted according to the 30-cluster sampling technique,which is the standard methodology for such surveys devised by World Health Organization.A total of 300 children aged 12-23 months were included,whose immunization details were noted from their immunization *** Full immunization rate was noted in 86.7%of the children,with partial and non-immunized children accounting for 9%and 4.3%*** full immunization dropout rate was 4.2%.The common reasons for partial or non-immunization were family problem including illness of mother,vaccine not being available and child being *** of birth(P=0.014)and availability of immunization card(Prage being higher than the national average,it was concluded that the immunization coverage was optimal and not affected by the COVID-19 pandemic.

关键词： Immunization coverage Children COVID 19 pandemic Vaccines Family health Routine immunization