检索结果-南通市图书馆

hlder Continuity for a Class of Strongly Degenerate Schrdinger Operator Formed by Vector Fields

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2013年第2期29卷 281-288页

作者： Yong-yang JIn Jie-lin l Rong-fei lIn Department of Applied Mathematics Zhejiang University of Technology Zhejiang Vocational College of Commerce Department of Mathematics Taizhou University

In this paper we obtain the h61der continuity property of the solutions for a class of degenerate Schr6dinger equation generated by the vector fields：∑i,j=1^m Xj^＊（aij（x）Xiu）＋bXu=uu=0,where X = {X1,.-. ,Xm} is a family of C^∞ vector fields satisfying the h6rmander condition, and the lower order terms belong to an appropriate Morrey type space.

关键词： hoe1der continuity degenerate SchrSdinger operator green function

在线全文

学校读者我要写书评

暂无评论

中越传统节日文化习俗对比及教学研究

中越传统节日文化习俗对比及教学研究

作者：阮氏荷（nGUY(?)n Th(?) h(?)）扬州大学

学位级别：硕士

中越两国一衣带水,都属于东方文化体系。中华文化与越南文化从几千年前开始就有着密切联系,两国传统文化互相影响、互相融合。传统节日是反映人们生活和国家文化的一面镜子。虽然越南的传统节日起源于中国,但是在吸收和继承中国的传统... 详细信息

中越两国一衣带水,都属于东方文化体系。中华文化与越南文化从几千年前开始就有着密切联系,两国传统文化互相影响、互相融合。传统节日是反映人们生活和国家文化的一面镜子。虽然越南的传统节日起源于中国,但是在吸收和继承中国的传统节日文化的同时,又与自身的民族特色相融合,形成了独特的节日文化。对中越的传统节日的对比研究,能够有效的帮助中越两国人民了解两国文化的差异性,也可以在对越汉语教学中减少文化差异和文化冲突,同时有助于越南汉语学习者更好地了解和学习中国文化。本文以中越两国传统节日文化作为研究对象,运用比较分析的方式,分析两国的三大传统节日的差异,并对越南汉语学习者进行调查中国传统节日文化习得情况,然后提出相关的教学建议。基本的内容如下:第一章阐述中越传统节日的基本情况。首先定义了传统节日和节日习俗的相关概念,归纳出它们的特征,然后从节日的主要内容来考察,分类传统节日。进行介绍了中国和越南传统节日的组成,找出了中越两国的共有传统节日。第二章对中越三大传统节日文化习俗比较分析。找出两国传统节日文化的共同点和不同点。从此对中越文化习俗差异进行分析、找出细节的原因:民族文化特色、宗教信仰和西方文化的影响。第三章对120名越南汉语学习者进行问卷调查和个别访谈,发现越南学生在中国节日文化学习过程中的特点和薄弱环节,分析和总结中国传统节日文化在对外汉语教学的重要性,从而提出教材编写、教学方法、汉语教师培养等方面的建议。在对越汉语教学过程中,我们只有把握好语言背后所蕴含的独特的文化背景和文化内涵,才能更好地提高语言交际能力,有效避免交际冲突乃至交际失败。

关键词：中越传统节日文化对比对越汉语教学

Predictors of surgical complications in boys with hypospadias:data from an international registry

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

World Journal of Pediatric Surgery 2023年第4期6卷 217-223页

作者： Kathryn Scougall Jillian Bryce Federico Baronio Rachel l Boal Jose Roberto Castera Sebastián Castro Tim Cheetham Eduardo Correa Costa Feyza Darendeliler Justin h Davies Mirjam Dirlewanger Gabriella Gazdagh Evgenia Globa Gil Guerra-Junior Tulay Guran Gloria herrmann Paul-Martin holterhus Ahsen KaragözlüAkgül Renata Markosyan Kenneth McElreavey Marcio lopes Miranda Anna nordenstrom Stuart O’Toole Sukran Poyrazoglu Gianni Russo Valerie Schwitzgebel Marianna Stancampiano Michael Steigert S Faisal Ahmed Angela K lucas-herald University of Glasgow GlasgowUK IRCCS Azienda Ospedaliero-Universitaria di Bologna Policlinico S Orsola BolognaItaly Great north Children's hospital Newcastle Upon TyneUK hospital de ninos Ricardo Gutiérrez Buenos AiresArgentina hospital de Clinicas de Porto Alegre Porto AlegreBrazil Istanbul University IstanbulTurkey Southampton Children's hospital SouthamptonUK University hospital of Geneva GenevaSwitzerland Ukrainian Research Center of Endocrine Surgery Endocrine Organs and Tissue Transplantation KyivUkraine State University of Campinas CampinasBrazil Marmara University IstanbulTurkey University Medical Centre UlmGermany University hospital of Schleswig-holstein Campus Kiel/Christian-Albrechts-University of Kiel KielGermany Marmara University Faculty of Medicine IstanbulTurkey Yerevan State Medical University Endocrinology Clinic YerevanArmenia Institut Pasteur ParisFrance Karolinska University hospital StockholmSweden Royal hospital for Children GlasgowUK IRCCS Ospedale San Raffaele MilanoItaly Graubunden Cantonal hospital ChurSwitzerland

Background Complications are frequently reported after hypospadias repair and there is a need to understand the factors that influence their *** Data from boys with hypospadias born between 2000 and 2020 were obtained from the International Disorders of Sex Development(l-DSD)*** regressions,fisher's exact tests and spearman's correlation tests were performed on the data to assess associations between clinical factors and complication *** Of the 551 eligible boys,data were available on 160(29%).Within the cohort,the median(range)External Masculinization Score(EMS)was 6(2,9).All presented with one or more additional genital malformation and 61(38%)presented with additional extragenital *** of androgen action,androgen synthesis and gonadal development were diagnosed in 28(18%),22(14%)and 9(6%)boys,*** remaining 101(62%)patients were diagnosedas having non-specific 46,XY Disorders of Sex ***(50%)boys had evidence of abnormal biochemistry,and gene variants were identified in 42(26%).Median age at first hypospadias surgery was 2 years(0,9),and median length of follow-up was 5 years(0,17).Postsurgical complications were noted in 102(64%)*** were no significant associations with postsurgical *** Boys with proximal hypospadias in the I-DSD Registry have high rates of additional comorbidities and a high risk of postoperative *** clinical factors were significantly associated with complication *** complication rates with no observable cause suggest the involvement of other factors which need investigation.

关键词： complications surgical involvement

Mapping QTl associated with Verticillium dahliae resistance in the cultivated strawberry(Fragaria×ananassa)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

horticulture Research 2015年第1期2卷 272-279页

作者： l Antanaviciute nŠurbanovski n harrison K J Mcleary D W Simpson F Wilson D J Sargent R J harrison East Malling Research New RoadEast MallingKent ME196BJUK Research and Innovation Centre Fondazione Edmund MachVia E.Mach 138010 San Michele all’Adige(TN)Italy

A biparental cross of octoploid strawberry segregating for resistance to Verticillium dahliae,the causative agent of Verticillium wilt,was screened under field conditions for three *** wilt scores were significantly associated with multiple QTl,which were mostly significant across all *** significantly associated with the traits were used to screen material with known wilt resistance and susceptibility phenotypes.A clear and statistically significant relationship was observed between resistant,tolerant and susceptible material and the total number of markers present in the different resistance *** field situations resistance QTl appear to behave in an additive *** markers are abundant in the cultivated strawberry germplasm indicating that,despite the large number of markers,clear genetic gain is possible through marker-assisted breeding.

关键词： straw Fragaria resistance

neutral responses of plant community Ca concentration to nitrogen enrichment in a semiarid grassland

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2022年第2期15卷 286-293页

作者： Shuang-li hou Xiao-Tao lü Jun-Jie Yang Erguna Forest-Steppe Ecotone Research Station CAS Key Laboratory of Forest Ecology and ManagementInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016China State Key laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China

Calcium(Ca)is an essential nutrient for plant growth and Ca concentrations in forage have important implications for ruminant diet and *** remains an open question whether forage Ca concentration would be decreased by increasing nitrogen(n)*** manipulated the increasing rates of n addition(2008–2015)in a semiarid grassland,northern *** Ca concentrations for all species were examined in each plot under n *** Ca concentrations at functional group and community levels were calculated based on the concentration of each species presented and their relative biomass in each *** found that community-level Ca concentration remained stable across a gradient of wide-ranged n addition rates,although Ca concentration at both species and functional group levels showed negative responses to n *** that forbs had higher Ca concentration than grasses,the increasing relative biomass of forbs canceled out the negative responses of species-level and functional group-level Ca *** results further showed that community Ca pool showed a positive but saturating response to n addition,with a threshold at the rate of 10 g n m^(−2)yr^(−1).Our findings highlight the role of changes in plant relative biomass in controlling the responses of forage Ca concentration and stock to n enrichment.

关键词： calcium stock community composition ecological processes global changes nitrogen deposition temperate steppe

Vertically aligned nanocomposite films by self-assembled epitaxial nucleation for super-broadband transparent conductors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

InfoMat 2023年第4期5卷 14-24页

作者： Youngkyoung ha Judith l.MacManus-Driscoll Shinbuhm lee Department of Physics and Chemistry DGISTDaeguRepublic of Korea Department of Emerging Materials Science DGISTDaeguRepublic of Korea Department of Materials Science and Metallurgy University of CambridgeCambridgeUK

Designing super-broadband transparent conductors is challenging because of the exclusive nature of conductivity and infrared ***,using a one-step process,we created vertically aligned nanocomposite conducting films with high transparency across a super-broad wavelength *** aligned transparent Ba_(3)V_(2)O_(8)nanocolumns with lateral-100-nm widths enable high transmittance(>50%,even at a 4-μm wavelength)for all incident light and outperform that of Sn-doped In_(2)O_(3),while the conducting SrVO_(3)matrix retains low resistivity(ned study of scanning transmission electron microscopy,scattering scanning nearfield infrared microscopy,and X-ray diffraction revealed that spontaneous phase separation of Ba_(3)V_(2)O_(8)nanocolumns in a SrVO_(3)matrix film occurs via self-assembled epitaxial *** vertically aligned nanocomposite films provide a fertile platform for next-generation optoelectronics.

关键词： epitaxial nucleation spontaneous phase separation SrVO_(3)-Ba_(3)V_(2)O_(8) super-broadband transparent conductors vertically aligned nanocomposite films

Annual and interannual variations of the Western Pacific Warm Pool volume and sources of warm water revealed by Argo data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2014年第12期57卷 2269-2280页

作者： WU XiaoFen ZhAnG Qilong lIU Zenghong Second Institute of Oceanography State Oceanic Administration Key laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences State Key laboratory of Satellite Ocean Environment Dynamics State Oceanic Administration

Based on gridded Argo profile data from January 2004 to December 2010, together with the P-vector inverse method, the three-dimensional structure, annual and inter-annual variations in volume of the Western Pacific Warm Pool （WPWP） are studied. The variations of latitudinal and longitudinal warm water flowing into and out of the WPWP and the probable mecha- nism of warm water maintenance are also discussed. From the surface to the bottom, climatic WPWP tilts southward and its area decreases. The maximum depth could extend to 120 m, such that its volume could attain 1.86x10^5 m3. Annual variation of the WPWP volume shows two obvious peaks that occur in June and October, whereas its inter-annual variations are related to EnSO events. Based on a climatic perspective, the warm water flowing latitudinally into the pool is about 52 Sv, which is mainly through upper layers and via the eastern boundary. latitudinally, warm water flowing outward is about 49 Sv, and this is mainly through lower layers and via the western boundary. In contrast, along the latitude, warm water flowing into and out of the pool is about 28 Sv and 23 Sv, respectively. Annual and inter-annual variations of the net transportation of the warm water demonstrate that the WPWP mainly loses warm water in the west-east direction, whereas it receives warm water from the north-south direction. The annual variation of the volume of WPWP is highly related to the annual variation of the net warm water transportation, however, they are not closely related on inter-annual time scale. On the inter-annual time scale, in- fluences of EnSO events on the net warm water transportation in the north-south direction are much more than that in the west-east direction. Although there are some limitations and simplifications when using the P-vector method, it could still help improve our understanding of the WPWP, especially regarding the sources of the warm water.

关键词： Western Pacific Warm Pool volume variability latitudinal flow longitudinal flow Argo data P-vector method

Role of lPS/CD14/TlR4-mediated inflammation in necrotizing enterocolitis:Pathogenesis and therapeutic implications

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第38期15卷 4745-4752页

作者： Kwong l Chan Kwong F Wong John M luk Department of Surgery The University of Hong Kong Division of Paediatric Surgery Queen Mary Hospital Department of Pharmacology and Department of Surgery National University Health SystemNational University of SingaporeMD11 #05-1210 Medical Drive

AIM:To establish the roles of lipopolysaccharide (lPS)/CD14/toll-like receptor 4 (TlR4)-mediated inflammation in a rat model of human necrotizing enterocolitis (nEC).METhODS: Six pairs of intestinal samples from human nEC were collected before and after recovery for histological and molecular analysis of inflammatory cytokines and signaling components. In the rat nEC model, we isolated 10-cm jejunum segments and divided them into six groups (n=6) for sham operation, treatment with lPS, bowel distension, combined bowel distension and lPS stimulation, and two therapeutic groups. The potential eff icacy of a recombinant CD18 peptide and a monoclonal CD14 antibody was evaluated in the latter two groups. The serum and tissue levels of several inflammatory mediators were quantified by real-time polymerase chain reaction, ElISA and ***: human acute phase nEC tissues displayed significant increases (Pn levels of TlR4, CD14, myeloid differentiation protein (MD)-2, tumor necrosis factor (TnF)-α and nuclear factor-κB when compared to those after recovery. The histological and inflammatory picture of human nEC was reproduced in rats that were treated with combined bowel distension and lPS, but not in the sham-operated and other control rats. Serum levels of interleukin-6 and TnF-α were also elevated. The nEC pathology was attenuated by treating the nEC rats with a monoclonal CD14 antibody or an lPS-neutralizing ***:lPS and distension are required to produce the histological and inflammatory features of nEC. A potential treatment option is blocking lPS activation and leukocyte infi ltration.

关键词： CD14 antigen lipopolysaccharide necrotizing enterocolitis Pathogenesis Therapy Toll-like receptor 4

Synthesis and crystal structure of a neodymium coordination polymer with 2,6-anthraquinonedisulfonate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2010年第3期8卷 221-224页

作者： Jennifer l. nicholls John Bacsa Andrew M. Fogg Department of Chemistry University of Liverpool Crown Street Liverpool L69 7ZD United Kingdom

The coordination polymer, （nd（h2O）5）2（2,6-AQDS）3.2h2O where 2,6-AQDS = 2,6- anthraquinonedisulfonate, has been synthesised via a hydrothermal route. Structurally, it consists of layers of monomeric nd polyhedra which are linked by 2,6-AQDS anions forming a polymeric, three-dimensional network. Each nd atom is nine coordinate, bonding to five water molecules and to four oxygen atoms from four 2,6-AODS anions which in turn pillar the layers by bridging two nd atoms in one layer, and coordinating to a single nd in the other.

关键词： lanthanide layered materials Sulfonate Coordination polymer