检索结果-南通市图书馆

Influence of unrecorded alcohol consumption on liver cirrhosis mortality

world Journal of Gastroenterology 2014年第23期20卷 7217-7222页

作者： Dirk w Lachenmeier Yulia b Monakhova Jürgen Rehm Epidemiological Research Unit Institute for Clinical Psychology and PsychotherapyTechnische Universit?t Dresden01187 DresdenGermany Chemisches und Veterin?runtersuchungsamt (CVUA) Karlsruhe 76187 KarlsruheGermany Centre for Addiction and Mental Health (CAMH) TorontoON M5S 2S1Canada Dalla Lana School of Public Health University of TorontoTorontoON M5T 3M7Canada

Unrecorded alcohol includes illegally distributed alcohol as well as homemade or surrogate alcohol which is unintended for consumption by humans(e.g.,cosmetics containing alcohol).The highest unrecorded alcohol consumption occurs in Eastern Europe and some of these countries have an over proportional liver cirrhosis *** besides ethanol have been hypothesized as being responsible for this *** the other hand,chemical investigations were unable to prove that unrecorded alcohol regularly contains contaminants above toxicological ***,illegally produced spirits regularly contain higher percentages of alcohol(above 45%by volume),but for considerably less costs compared with licit beverages,potentially causing more problematic patterns of *** this review,it is investigated whether patterns of drinking rather than product composition can explain the liver cirrhosis mortality *** examination of world Health Organization country data shows that the originally detected correlation of the percentage of unrecorded alcohol consumption and liver cirrhosis mortality rates disappears when the data is adjusted for the prevalence of heavy episodic *** may be concluded that there is currently a lack of data to demonstrate causality between the composition of illicit spirits(e.g.,higher levels of certain contaminants in home-produced products)and liver toxicity on a population *** may be cases of poisoning with antiseptic liquids containing compounds such as polyhexamethyleneguanidine,which were reported to be consumed as surrogate alcohol in Russia,leading to an outbreak of acute cholestatic liver injury,histologically different from conventional alcoholic liver disease.

关键词： Epidemiology Liver cirrhosis Alcoholic beverages Unrecorded alcohol Risk assessment

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

Current Status in Layered Ternary Carbide Ti_3SiC_2,a Review

引用

Journal of Materials Science & Technology 2009年第1期25卷 1-38页

作者： H.b. Zhang Y.w. bao Y. C. Zhou Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

This article provides a review of current research activities that concentrate on Ti3SiC2. we begin with an overview of the crystal and electronic structures, which are the basis to understand this material. Followings are the synthetic strategies that have been exploited to achieve, and the formation mechanism of Ti3SiC2. Then we devote much attentions to the mechanical properties and oxidation/hot corrosion behaviors of Ti3SiC2 as well as some advances achieved recently. At the end of this paper, we elaborate on some new discoveries in the Ti3SiC2 system, and also give a brief discussion focused on the ＂microstructure -property＂ relationship.

关键词： Layered ternary ceramics Ti3SiC2 Mechanical properties Oxidation

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

An Effective Error Resilient Packetization Scheme for Progressive Mesh Transmission over Unreliable Networks

引用

Journal of Computer Science & Technology 2008年第6期23卷 1015-1025页

作者：杨柏林 Frederick w. b. Li 潘志庚王勋 College of Computer Science and Information Engineering Zhejiang Gongshang University State Key Laboratory of CAD & CG Zhejiang University Department of Computer Science University of DurhamU.K.

when a 3D model is transmitted over a lossy network, some model information may inevitably be missing. Under such situation, one may not be able to visualize the receiving model unless the lost model information has been retransmitted. Progressive model transmission offers an alternative to avoid the ＂all or nothing situation＂ by allowing a model to be visualized with a degraded quality when only part of the model data has been received. Unfortunately, in case some model refinement information is missing, one may still need to wait for such information to be retransmitted before the model can be rendered with a desired visual quality. To address this problem, we have developed a novel error resilient packetization scheme. we first construct a Non-Redundant Directed Acyclic Graph to encode the dependencies among the vertex splits of a progressive mesh. A special Global Graph Equipartition Packing Algorithm is then applied to partitioning this graph into several equal size sub-graphs, which is packed as packets. The packing algorithm comprises two main phases： initial partition phase and global refinement phase. Experimental results demonstrate that the proposed scheme can minimize the dependencies between packets. Hence, it reduces the delay in rendering 3D models with proper quality at the clients.

关键词： computer graphics packetization graph partition progressive transmission unreliable network

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

A stabilized complementarity formulation for nonlinear analysis of 3D bimodular materials

引用

Acta Mechanica Sinica 2016年第3期32卷 481-490页

作者： L.Zhang H.w.Zhang J.wu b.Yan Department of Engineering Mechanics College of AerospaceEngineering Chongqing University State Key Laboratory of Structural Analysis for IndustrialEquipment Dalian University of Technology

bi-modulus materials with different mechanical responses in tension and compression are often found in civil,composite, and biological engineering. Numerical analysis of bimodular materials is strongly nonlinear and convergence is usually a problem for traditional iterative schemes. This paper aims to develop a stabilized computational method for nonlinear analysis of 3D bimodular materials. based on the parametric variational principle, a unified constitutive equation of 3D bimodular materials is proposed, which allows the eight principal stress states to be indicated by three parametric variables introduced in the principal stress *** original problem is transformed into a standard linear complementarity problem（LCP） by the parametric virtual work principle and a quadratic programming algorithm is developed by solving the LCP with the classic Lemke＇s algorithm. Update of elasticity and stiffness matrices is avoided and, thus, the proposed algorithm shows an excellent convergence behavior compared with traditional iterative *** examples show that the proposed method is valid and can accurately analyze mechanical responses of 3D bimodular materials. Also, stability of the algorithm is greatly improved.

关键词： bimodular materials Non-smooth stressstrain relationship Parametric variational principle Complementarity

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

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

引用

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

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

Interface dominated deformation transition from inhomogeneous to apparent homogeneous mode in amorphous/amorphous nanolaminates

引用

Journal of Materials Science & Technology 2022年第4期99卷 178-183页

作者： Z.Q.Chen M.C.Li J.S.Cao F.C.Li S.w.Guo b.A.Sun H.b.Ke w.H.wang Songshan Lake Materials Laboratory Dongguan 523808PR China Institute of Physics Chinese Academy of SciencesBeijing 100190PR China Institute of Materials Engineering Nanjing UniversityNantong 226019PR China School of Physics Science and Technology Xinjiang UniversityXinjiang 830046PR China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049PR China State Key Laboratory for Mechanical behavior of Material Xi'an Jiaotong UniversityXi’an 710049PR China

The amorphous/amorphous nanolaminates(A/ANLs)have aroused great attentions owing to their tunable structure and enhanced mechanical ***,the plastic deformation mechanism of A/ANLs have yet been ***,we systematically examined the mechanical properties and deformation behavior of series of NiNb/ZrCuNi Al A/ANLs via nanoindentaion *** was found that both the amount and morphology of amorphous/amorphous interface(A/AIs)played crucial roles in the plastic deformation of A/*** and straighter A/AIs facilitated multiple shear banding deformation,of which the hardness increased with decreasing layer thickness,as the A/AIs hindered the propagation of shear bands(Sbs).whilst,more and wavier A/AIs promoted homogeneous deformation,of which the hardness stayed at a much lower value and was relatively irrelevant with the layer thickness,for the promoted activation of shear transformation zones by A/*** results provide guidance for modifying the mechanical properties of amorphous alloys with interface engineering design.

关键词： Amorphous alloys Nanolaminates Shear bands Hardness Interface

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

Improving the strength and SCC resistance of an Al-5Mg-3Zn alloy with low-angle grain boundary structure

引用

Journal of Materials Science & Technology 2023年第30期161卷 63-73页

作者： Z.C.Tang w.Xu D.Y.Zhao b.Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

The strength of traditional Al-Mg alloys is relatively low because it mainly relies on solid solution *** a third component to form precipitation can improve their strength,but it usually leads to high-stress corrosion cracking(SCC)sensitivity due to the formation of high-density precipitates at grain boundaries(Gbs).So far,it is still challenging to improve the strength of Al-Mg alloys without re-ducing SCC ***,a nanostructured Al-5Mg-3 Zn alloy with a good yield strength of 336 MPa and good elongation was successfully *** dynamic plastic deformation and appropriate anneal-ing treatment,near-equiaxed nanograins were introduced in the nanostructured Al-5Mg-3 Zn alloy with a high proportion(71%)of the low-angle grain *** statistical investigations show that the pre-cipitation of active T’phase at Gbs has been greatly suppressed in the nanostructured Al-5Mg-3 Zn alloy at sensitized conditions,and the area fraction of Gb precipitates is reduced from 72%to 21%,which sig-nificantly decreases the SCC *** study provides guidance for developing advanced Al-Mg alloy with high SCC resistance.

关键词： Al-5Mg-3 Zn alloy Stress corrosion cracking Low angle grain boundary Nanostructured Dynamic plastic deformation

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

Microbial resistance to nanotechnologies:An important but understudied consideration using antimicrobial nanotechnologies in orthopaedic implants

引用

bioactive Materials 2022年第10期7卷 249-270页

作者： Zhuoran wu brian Chan Jessalyn Low Justin Jang Hann Chu Hwee weng Dennis Hey Andy tay Institute of Health Innovation&Technology National University of Singapore117599Singapore Department of biomedical Engineering National University of Singapore117583Singapore biosafety Level 3 Core Facility Yong Loo Lin School of MedicineNational University of Singapore117599Singapore Department of Microbiology and Immunology Yong Loo Lin School of MedicineNational University of Singapore117545Singapore Infectious Disease Programme Yong Loo Lin School of MedicineNational University of Singapore117547Singapore Institute of Molecular and Cell biology 35 Agency for ScienceTechnology and Research138673Singapore National University Health System National University of Singapore119228Singapore Tissue Engineering Programme National University of Singapore117510Singapore

Microbial resistance to current antibiotics therapies is a major cause of implant failure and adverse clinical outcomes in orthopaedic *** developments in advanced antimicrobial nanotechnologies provide numerous opportunities to effective remove resistant bacteria and prevent resistance from occurring through unique *** tunable physicochemical properties,nanomaterials can be designed to be bactericidal,antifouling,immunomodulating,and capable of delivering antibacterial compounds to the infection region with spatiotemporal *** its substantial advancement,an important,but under-explored area,is potential microbial resistance to nanomaterials and how this can impact the clinical use of antimicrobial *** review aims to provide a better understanding of nanomaterial-associated microbial resistance to accelerate bench-to-bedside translations of emerging nanotechnologies for effective control of implant associated infections.

关键词： bacterial infection Orthopaedic implant Microbial resistance Nanomaterial Antimicrobial nanotechnology

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

Influence of towing speed on effectiveness of rolling dynamic compaction

引用

Journal of Rock Mechanics and Geotechnical Engineering 2020年第1期12卷 126-134页

作者： brendan T.Scott Mark b.Jaksa Peter w.Mitchell School of Civil Environmental and Mining EngineeringThe University of AdelaideSouth Australia5005Australia Aurecon AdelaideSouth Australia5000Australia

The influence of towing speed on the effectiveness of the 4-sided impact roller using earth pressure cells(EPCs)is *** field trials were undertaken;the first trial used three EPCs placed at varying depths between 0.5 m and 1.5 m with towing speeds of 9-12 km/*** second used three EPCs placed at a uniform depth of 0.8 m,with towing speeds of 5-15 km/*** findings from the two trials confirmed that towing speed influences the pressure imparted to the ground and hence compactive *** paper proposes that the energy imparted to the ground is best described in terms of work done,which is the sum of the change in both potential and kinetic *** practice of using either kinetic energy or gravitational potential energy should be avoided as neither can accurately quantify rolling dynamic compaction(RDC)when towing speed is varied.

关键词： Rolling dynamic compaction(RDC) Optimum towing speed Ground improvement

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

Microstructure,texture and mechanical behavior characterization of hot forged cast ZK60 magnesium alloy

引用

Journal of Materials Science & Technology 2017年第9期33卷 907-918页

作者： S.M.H.Karparvarfard S.K.Shaha S.b.behravesh H.Jahed b.w.williams Department of Mechanical & Mechatronics Engineering University of Waterloo Canmet MATERIALS Natural Resources Canada

structure with a significant reduction in casting porosity, while the texture changed to sharp basaMeasured mechanical properties of the forged alloy showed that strength did not change, howductility improved by 75%. The analysis of the fracture surface of the forged alloy under tension rea ductile fracture with dimple morphology, while the as-cast alloy displayed a brittle fracture with pores. This demonstrated that the reduction of casting defects and dendritic morphology, as well evolution of recrystallized grains, enhanced ductility, while partial dynamic recrystallization throuforging process resulted in only marginal modification of strength in the forged condition.. 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials SciTechno

关键词： Magnesium Forging Ductility Texture Recrystallization

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

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：