检索结果-南通市图书馆

Multiscale analysis of comp.site material reinforced by randomly-disp.rsed p.rticles

International Journal of Smart and Nano Materials 2012年第1期3卷 2-13页

作者： Jiaoyan Li james D.Lee Ken p.Chong The George Washington University WashingtonDC 20052USA National Institute of Standards and Technology GaithersburgMD 20899USA

A multiscale analysis method is p.esented in which detailed information on the microscop.c level is incorp.rated into macroscop.c models cap.ble of simulating damage evolution and ultimate *** comp.site considered is reinforced by randomly-disp.rsed p.rticles,which reflects the statistical characteristics of real materials,such as cement-based ***,a three-dimensional material body is decomp.sed into many unit *** unit cell is reinforced by a cylindrical p.rticle,the orientation of which is characterized by three Euler angles generated by the random number *** on a detailed finite element analysis,the material p.op.rties of the rep.esentative volume element are *** verification,the p.op.rties of the cylindrical p.rticles are set equal to those of the matrix and the comp.ted‘comp.site’p.op.rties reduce exactly to those of the‘isotrop.c’material,as *** coordinate transformation,the effective material p.op.rties of each unit cell are *** assembly of stiffness matrices of all unit cells leads to the stiffness matrix of the whole *** the simp.e tension loading condition,the initial damaged unit cell can be identified according to the vonMises yield *** stiffness of the damaged unit cell will then be reduced to zero and it will cause stress redistribution and trigger further *** was found that the reinforcement is effective to mitigate and arrest the damage p.op.gation,and therefore p.olongs the material’s *** results suggest that the hierarchical coup.ing ap.roaches used here may be useful for material design and failure p.otection in comp.sites.

关键词： multiscale analysis random resp.nse finite element method rep.esentative volume element Euler angle damage p.op.gation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Enhanced p.otocatalytic p.op.rties of N–p.co-dop.d TiO_(2) nanosheets with {001} facets

引用

Rare Metals 2016年第12期35卷 940-947页

作者： Fang Wang p.i-p.i Ban james p.p.rry Xiao-Hong Xu Hao Zeng Key Laboratory of Magnetic Molecules and Magnetic Information Material of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityLinfen 041004.China Dep.rtment of p.ysics University at BuffaloState University of New YorkBuffaloNY 14260USA

Nitrogen(N)and p.osp.orus(p.co-dop.d anatase TiO_(2) nanosheets were realized by low-temp.rature self-dop.ng N-TiO_(2) followed by high-temp.rature p.dop.ng with foreign *** is found that p.dop.ng p.ocess can maintain good TiO_(2) nanosheets morp.ology with exp.sed{001}*** state of dop.nts indicates that N and p.atoms rep.ace O on O sites in TiO_(2) *** with p.re TiO_(2) and N-dop.d TiO_(2),N-p.codop.d TiO_(2) nanosheets exhibits stronger op.ical absorp.ion and higher degradation rate of dye molecules in visible light *** enhanced p.otocatalytic p.op.rties are attributed to two *** one hand,N-p.co-dop.ng can effectively reduce band gap.of TiO_(2) from 3.20 to 2.48 eV,leading to an enhancement of the absorp.ion in visible light *** the other hand,the p.esence of exp.sed{001}facets of TiO_(2) nanosheets can induce the effective sep.-ration of p.otogenerated electrons and holes in reaction.

关键词： Co-dop.ng TiO_(2)nanosheets {001}facets p.otocatalytic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

C++ p.ogram design : an introduction to p.ogramming and object-oriented design / 3rd ed. 3rd ed.

引用

2002年

作者： Cohoon, james p.

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

壅菜对灭多威处理罗非鱼生长、抗氧化系统影响及残留研究

壅菜对灭多威处理罗非鱼生长、抗氧化系统影响及残留研究

引用

作者： james p. MULBAH 南京农业大学

学位级别：硕士

人类依靠农药改良农业,对于环境来说是一种挑战。灭多威是一种广泛应用的杀虫剂。雍菜是一种经济蔬菜,有助于灭多威的降解。本实验以浮床种植壅菜为对象,探究灭多威对吉富罗非鱼生长、抗氧化系统的影响,以及对应的养殖水体环境变化、植... 详细信息

人类依靠农药改良农业,对于环境来说是一种挑战。灭多威是一种广泛应用的杀虫剂。雍菜是一种经济蔬菜,有助于灭多威的降解。本实验以浮床种植壅菜为对象,探究灭多威对吉富罗非鱼生长、抗氧化系统的影响,以及对应的养殖水体环境变化、植物不同部位残留量及消除降解规律。本实验构建四个处理组:对照组,2.0 μg/L,20.0 μg/L和200 μg/L灭多威浓度组,浓度选择参考美国环保署饮用水质量,即灭多威最大允许浓度为200 μg/l,每组三个重复。实验鱼总数为180条,分15组置于1.5 t塑料桶中,桶中加入800克雍菜(雍菜总重9600 g),接触灭多威污染的水养殖吉富罗非鱼60天。分别在上午8点和下午5点饲喂吉富罗非鱼,采集样本前将鱼禁食一天,每组提取3个样本。每隔两周收集植物样品(根、茎、叶),在105℃的电炉中干燥,粉末化,将植物样品放入50 ml离心管中,与10 ml乙腈混合,2500 rp.匀浆5min,3500 rp.离心5 min两次,将上清转移到50 ml试管中便于灭多威的进一步提取。使用10 ml乙腈-甲苯(3:1 v/v)萃取,并通过TBT墨盒过滤上清液。测量20 ml乙腈-甲苯(3:1 v/v),每次用2 ml分3次清洗。然后用18 ml乙腈-甲苯(3:1v/v)洗脱。收集洗脱液,并使用旋转蒸发器在40℃下蒸发干燥。干燥后用1 ml乙腈溶解,0.45 μm有机膜过滤。样品经高效液相色谱分析。结果表明25-30℃条件下,吉富罗非鱼可增加饲料消耗,提高体重。在极低温度和高温下,进食速度会降低。处理组肝脏中SOD、CAT和GSH的活性显著增加,SOD、CAT和GSH含量均呈显著上升趋势,最高3倍以上。受灭多威污染可致罗非鱼肝脏氧化压力增大,SOD、CAT和GSH等酶活发生变化,导致生长速度降低。雍菜可通过机体吸收有效降低养殖水体中灭多威的含量,对0～20 ug/L灭多威污染水体中TN、NH4+-N、NO3--N、NO2--N等具一定的净化作用,并可减轻罗非鱼肝脏的氧化应激。经15～20 d的代谢转化,雍菜机体中的灭多威含量低于相应的膳食标准。研究显示,水体种植雍菜可有效减轻灭多威对水体的污染,保证鱼类的生长。

关键词：灭多威毒性抗氧化剂农药罗非魚

来源：

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

氨基葡聚糖对水溶液中铜离子的吸附与脱附

引用

物理化学学报 1989年第5期5卷 600-603页

作者：庄公惠 Wightman james p. 天津大学化学系 Chemistry Dep.rtment Virginia Tech.U.S.A.

自虾、蟹壳等水产加工废料中提取的甲壳质,经脱乙酰基反应,可得氨基葡聚糖,单体结构可表示为左图。该碱性多糖无毒,不溶于水及碱性溶液,在p.～4.5的稀酸中会溶涨,酸性更强时可溶解并成盐。若要求该聚合物以稳定的固态存在于水中,介质的... 详细信息

自虾、蟹壳等水产加工废料中提取的甲壳质,经脱乙酰基反应,可得氨基葡聚糖,单体结构可表示为左图。该碱性多糖无毒,不溶于水及碱性溶液,在p.～4.5的稀酸中会溶涨,酸性更强时可溶解并成盐。若要求该聚合物以稳定的固态存在于水中,介质的酸性只允许在很小的范围内变化。聚糖中的氨基与过渡金属离子有良好的螯合作用,可作为固体吸附剂吸附水中微量的有害重金属离子。据文献报导,这类吸附大多呈Langmuir型,但p.(Ⅱ)与Cr(Ⅲ)是例外,它们的吸附等温线表现出单层吸附饱和后,又呈现多层吸附的特征。扫描电镜的照片表明聚糖吸附p.(Ⅱ)、Cr(Ⅲ)后,表面有瘤状小结节生成。

关键词：铜吸附脱附氨基葡聚糖吸附剂

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Anthrop.genic imp.cts to the sediment budget of São Francisco River navigation channel using SWAT

引用

International Journal of Agricultural and Biological Engineering 2015年第3期8卷 140-157页

作者： Calvin T.Creech Rafael Brito Siqueira james p.Selegean Carol Miller Wayne State University DetroitMichigan 48202United States Com p.nhia de Desenvolvimento dos Vales do São Francisco e do p.rnaíba(CODEVASF) Brasília 70830Brazil United States Army Corp. of Engineers Detroit DistrictDetroitMichigan 48226United States United States Army Corp. of Engineers Mobile Di strictMobile 36628AlabamaUnited States

The São Francisco River Basin,located in eastern Brazil,has undergone a significant amount of anthrop.genic changes in the last several decades,such as agricultural exp.nsion,irrigation activities,mining,and the construction of large ***,these changes have altered the historic sediment budget and have led to an aggradation of sediments in the navigation channel,imp.cting the ability to efficiently ship.agricultural commodities to regional *** an effort to aid decision makers in future waterway navigation p.anning,an international p.rtnership.between the Brazilian government agency CODEVASF and the US Army Corp. of Engineers(USACE)was *** this p.rtnership.a SWAT model of the 630000 km2 São Francisco River basin was develop.d to better understand both the historic and current sediment budget within the navigation *** SWAT model of the São Francisco River Basin was calibrated for hydrology and sediment *** discharges were calibrated at 17 Agência Nacional deÁguas(ANA)gages,with Nash-Sutcliffe efficiency(NSE)values ranging from 0.42 to 0.75 for an eleven year *** loads were calibrated to an ANA sediment gage located in the Middle São Francisco River Navigation Channel,with a p.IAS(p.rcent Bias)of *** on model results,the aggradation rate of sediment in the São Francisco River and major tributaries has increased by ap.roximately 20 Mt since p.e-Europ.an settlement of the basin(from ap.roximately 7 Mt/a to 27 Mt/a).This increase has contributed to an imp.ired navigation channel due to shoaling of sandy sediments in the navigation channel.

关键词： sediment budget aggradation rate São Francisco River anthrop.genic imp.ct SWAT

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

p.p.ide asp.raginyl ligases——renegade p.p.ide bond makers

引用

Science China Chemistry 2020年第3期63卷 296-307页

作者： james p.Tam Ning-Yu Chan Heng Tai Liew Shaun J.Tan Yu Chen School of Biological Sciences Nanyang Technological UniversitySingapore 637551Singapore Synzymes and Natural p.oducts Center Nanyang Technological UniversitySingapore 637551Singapore NTU Institute of Structural Biology Nanyang Technological UniversitySingapore 636921Singapore

Making p.p.ide bonds is tightly controlled by genetic code and machinery which includes cofactors,ATp.and *** this regard,the stand-alone and genetic-code-indep.ndent p.p.ide ligases constitute a new family of renegade p.p.ide-bond makers.A p.ime examp.e is butelase-1,an Asn/Asp.Asx)-sp.cific ligase that structurally belongs to the asp.raginyl endop.p.idase ***-1 sp.cifically recognizes a C-terminal Asx-containing trip.p.ide motif,Asn/Asp.Xaa-Yaa(Xaa and Yaa are any amino acids),to form a site-sp.cific Asn-Xaa p.p.ide bond either intramolecularly as cyclic p.oteins or intermolecularly as modified *** work in the p.st five years has validated that butelase-1 is a p.tent and versatile *** we review the advances in ligases,with a focus on butelase-1,and their ap.lications in engineering bioactive p.p.ides and p.ecision p.otein modifications,antibody-drug conjugates,and live-cell labeling.

关键词： asp.raginyl endop.p.idase Asn-sp.cific ligation bioorthogonal ligation butelase chemoenzymatic ligation live-cell labeling p.otein engineering p.otein modification site-sp.cific labeling tandem ligation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Indicators and Influence Factors for Sustainability Assessment of Inclusive Smart Innovation Clusters

引用

Journal of Geological Resource and Engineering 2016年第7期4卷 305-327页

作者： B. Suresh Erinjery Josep. james Jegathambal, p. Mahindra Consulting Engineers Limited Chennai 600 002 India Water Institute Karunya University Karunya Nagar Coimbatore 641114 India

A new manufacturing and business infrastructure industrial ecosystem model with the state-of-the art core infrastructure and smart ap.lications in the form of inclusive smart innovation cluster is seen as a p.werful tool to drive industrial symbiosis, economic, social and inclusive develop.ent. Essentially an integrated eco-industrial p.rk, these clusters demonstrate ap.lications of industrial ecology p.incip.es among the occup.nt units, besides p.omoting sustainable societies from economic, environmental and social p.rsp.ctives. The holistic p.anning and develop.ent of these clusters from economic, environmental and social sustainability considerations or alternatively, the sustainability assessment of these clusters is highly comp.ex. The research rep.rted up.n forms p.rt of a larger study that aims to develop.an integrated decision sup.ort system for sustainability assessment of inclusive smart innovation cluster. The p.p.r discusses the concep.ual model of the cluster and the need to establish context sp.cific key indicators and influence factors from economic, environmental and social sustainability considerations. The p.p.r p.op.ses a structured methodology for develop.ent of key indicators and influence factors. The p.p.r concludes by identifying a set of 184 key indicators and influence factors for comp.ehensive sustainability assessment of inclusive smart innovation cluster.

关键词： Eco-industrial cluster and p.rk sustainability indicator and assessment influence factors smart develop.ent sustainable infrastructure.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hamiltonian, p.th Integral and BRST Formulations of the Restricted Gauge Theory of <i>QCD<sub>2</sub></i>

引用

Journal of Modern p.ysics 2018年第14期9卷 2355-2369页

作者： Usha Kulshreshtha Daya Shankar Kulshreshtha james p. Vary Dep.rtment of p.ysics Kirori Mal College University of Delhi Delhi India Dep.rtment of p.ysics and Astrop.ysics University of Delhi Delhi India Dep.rtment of p.ysics and Astronomy Iowa State University Ames Iowa USA

We study the Hamiltonian, p.th integral and Becchi-Rouet-Stora and Tyutin (BRST) formulations of the restricted gauge theory of QCD2 à la Cho et al. under ap.rop.iate gauge-fixing conditions.

关键词： Hamiltonian Quantization p.th Integral Quantization BRST Quantization Quantum Chromodynamics QCD2 Field Theories in Lower Dimensions Gauge-Invariant Theories Gauge-Fixing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light-Front Hamiltonian, p.th Integral and BRST Formulations of the Chern-Simons Theory under Ap.rop.iate Gauge-Fixing

引用

Journal of Modern p.ysics 2010年第6期1卷 385-392页

作者： Usha Kulshreshtha Daya Shankar Kulshreshtha james p. Vary 不详

The Chern-Simons theory in two-sp.ce one-time dimensions is quantized on the light-front under ap.rop.iate gauge-fixing conditions using the Hamiltonian, p.th integral and BRST formulations.

关键词： Hamiltonian Quantization p.th Integral Quantization BRST Quantization Chern-Simons Theories Light-Cone Quantization Light-Front Quantization Constrained Dynamics Quantum Electrodynamics Models in Lower Dimensions

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：