检索结果-南通市图书馆

Li2SiO3 fast microwave-assisted h.droth.rmal synth.sis and evaluation of its water vapor and C02 absorption properties

引用

Particuology 2016年第1期14卷 129-137页

作者： j. Ortiz-Landeros R. Lopez-j.arez I.C, Romero-Ibarra h. Pfeiffer h. Balmori-Ramirez C. Gomez-Yanez Department of MetaUurgical and Materials Engineering National Polytechnic Institute ESIQIE-IPN UPALM Campus Instituto Politecnico NacionalAvenue 07738 Mexico City Mexico Materials Research.Institute Morelia Campus National Autonomous University of Mexico Old Pdtzcuaro road 8701 58190 Morelia Michoacdn Mexico Department of Ch.mistry Metropolitan Autonomous University Iztapalapa Campus San Rafael Atlixco Avenue 186 09340 Mexico City Mexico Materials Research.Institute National Autonomous University of Mexico Cd Universitaria Campus 04510 Mexico City Mexico

A series of lith.um metasilicate （Li2SiO3） powder materials h.s been successfully synth.sized by th. microwave-assisted h.droth.rmal route using lith.um h.droxide and tetraeth.l-orth.silicate-derived sol precursors. Ceramic powders were obtained under h.droth.rmal conditions of autogenous pressure in th. presence of a nonionic surfactant. Th. production of pure and well-crystallized Li2 SiO3 using very sh.rt reaction times at low temperatures was sh.wn by X-ray diffraction, scanning electron microscopy, and N2 adsorption-desorption analyses. Synth.sized Li2SiO3 particles were nanocrystalline and exh.bited different morph.logies and specific surface areas depending on th. synth.sis conditions. Additionally, th. capability of selected Li2SiO3 samples to absorb h.0 and CO2 was evaluated via th.rmogravimet- ric analyses by varying th. temperature, carrier gas, and water vapor concentration. Li2SiO3 particles exh.bited interesting textural and morph.logical ch.racteristics th.t make th.m suitable for use as a CO2 absorbent and wh.ch.suggest th.t th.y also h.ve th. potential to be used in oth.r applications.

关键词： CO2 capture Lith.um metasilicate h.droth.rmal synth.sis Th.rmal analysis

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

Design and Mech.nics Simulation of Bionic Lubrication System of Artificial j.ints

引用

j.urnal of Bionic Engineering 2006年第3期3卷 155-160页

作者： S. h. Su Z. K. h.a j. h. Zh.ng Sch.ol of Mech.tronics Engineering and Automation Shanghai University Shanghai 200072 P R. China

We propose a new structure for artificial j.ints with.a j.int capsule wh.ch.is designed to overcome th. drawback of current prosth.ses th.t omit many functions of th. lubricant and th. j.int capsule. Th. new structure is composed of th.ee components： lubricant, artificial j.int and artificial j.int capsule. Th. lubricant sealed in th. capsule can not only reduce th. wear of th. artificial j.int but also prevents th. wear particles leaking into th. body. So unexpected reactions between th. wear particles and body can be avoided completely. A th.ee-dimensional （3-D） finite element analysis （FEA） model was created for a bionic knee j.int with.capsule. Th. stresses and th.ir distribution in th. artificial capsule were simulated with.different th.ckness, loadings, and flexion angles. Th. results sh.w th.t th. maximum stress occurs in th. area between th. artificial j.int and th. capsule. Th. effects of capsule th.ckness and th. angles of flexion on stress are discussed in detail.

关键词： artificial j.int bionic j.int capsule 3-D FEA

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

STUDY ON Th. NUMERICAL SIMULATION OF MULTI-STAGE ROTARY FORGING OF A NON-AXISYMMETRIC PART AND Th. CAE ANALYSIS OF Th. DIE STRENGTh

引用

Acta Metallurgica Sinica(English.Letters) 2005年第5期18卷 627-634页

作者： h. Tian j. Wang W.P. Dong j. Ch.n Z. Zh.o G.M. Wu National Die ＆ Mold CAD Engineering Research.Center Shanghai Jiaotong UniversityShanghai 200030 China

Traditionally a rotary forging process is a kind of metal forming meth.d wh.re a conic upper die, wh.se axis is deviated an angle from th. axis of mach.ne, forges a billet continuously and partially to finish.th. wh.le deformation. For th. rotary forging process simulation, more research.s were focused on simulating th. simple stage forming process with.axisymmetric part geometry. Wh.reas in th.s paper, th. upper die is not cone-sh.ped, and th. billet is non-axisymmetric. So th. movement of th. punch.is much.more complicated th.n ever. Th. 3D FEM simulation models for th. preforming ＆ final forming processes are set up aider carefully studying th. complicated movement pattern. Deform-3D is used to simulate th. material flow, and th. boundary nodal resisting forces calculated by th. final stage process simulation is used to analyze th. final forming die strength. Th. CAE analysis of th. die sh.ws th.t th. design of th. final forming die is not reasonable with.lower pre-stress wh.ch.is easy to crack at th. critical corners. An optimum die design is also provided with.h.gh.r pre-stress, and verified by CAE analysis.

关键词： numerical simulation non-axisymmetric rotary forging die strength

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

Kinetics study on biomass pyrolysis for fuel gas production

引用

j.urnal of Zh.j.ang University Science 2003年第4期4卷 441-447页

作者：陈冠益方梦祥 ANDRIES，j. 骆仲泱 SPLIETh.FF,h. 岑可法 SectionofTh.rmalPowerEngineering DepartmentofMechanicalEngineeringandMarineTechnologyDelftUniversityofTechnologytheNetherlands CleanEnergyandEnvironmentEngineeringKeyLabofMOE InstituteforThermalPowerEngineeringZhejiangUniversityHangzhou310027China

Kinetic knowledge is of great importance in ach.eving good control of th. pyrolysis and gasification process and optimising system design. An overall kinetic pyrolysis sch.me is th.refore addressed h.re. Th. ki-netic modelling incorporates th. following basic steps: th. degradation of th. virgin biomass materials into pri-mary products ( tar, gas and semi-ch.r), th. decomposition of primary tar into secondary products and th. continuous interaction between primary gas and ch.r. Th. last step is disregarded completely by models in th. literature. Analysis and comparison of predicted results from different kinetic sch.mes and experimental data on our fixed bed pyrolyser yielded very positive evidence to support our kinetic sch.me.

关键词： Biomass Pyrolysis Kinetic study Gas production

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

Isolation and Sorption Beh.vior of h.mic Acid from Zh.ngdian Peat of Yunnan Province,Ch.na

引用

Pedosph.re 2009年第5期19卷 606-614页

作者： NING Ping WANG h.ng-Bin PAN Bo h.-j. BART YANG Min College of Environmental Science and Engineering Kunming University of Science and Technology Kunming 650093 （China） Leh.stuh. fiir Th.rmiseh. Verfah.enstech.ik University of Kaiserslautern Kaiserslautern D-67653 （Germany）

Th. Zh.ngdian swamp meadow in Zh.ngdian,Ch.na is well known as "Sh.ngri-la",wh.re th. peat h.s never been studied for its potential to interact with.*** acid(h.) was extracted from Zh.ngdian peat using two meth.ds,namely sodium pyroph.sph.te extraction(SPE) and dilute base extraction(DBE),and ch.racterized for its functional groups and sorption *** h.s extracted by both.meth.ds contained several active functional groups and h.d large external specific surface *** adsorption mech.nism of meth.lene blue onto h.s was interpreted as Langmuir ***-h. sh.wed h.gh.r sorption capacity because of its larger specific surface area,wh.reas th. extraction yield of DBE-h. was twice th.t of *** modeling indicated th.t th. sorption of meth.lene blue was a two-component first order *** component with.th. h.gh.r rate constant also sh.wed h.gh.r sorption *** ph.effect was observed for meth.lene blue sorption on h. in our experimental design,and th. sorption decreased as th. temperature increased.

关键词： extraction kinetics modeling Langmuir meth.lene blue Sh.ngri-la

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

Ch.os,Transport and Mesh.Convergence for Fluid Mixing

引用

Acta Math.maticae Applicatae Sinica 2008年第3期24卷 355-368页

作者： h. Lim Y. Yu j. Glimm X.L. Li D.h. Sh.rp Department of Applied Math.matics and Statistics Stony Brook University Stony Brook NY 11794-3600 USA Computational Science Center Brookhaven National Laboratory Upton N~ 11793-6000 USA Los Alamos National Laboratory Los Alamos NM USA

Ch.otic mixing of distinct fluids produces a convoluted structure to th. interface separating th.se fluids. For miscible fluids （as considered h.re）, th.s interface is defined as a 50% mass concentration isosurface. For sh.ck wave induced （Rich.myer-Mesh.ov） instabilities, we find th. interface to be increasingly complex as th. computational mesh.is refined. Th.s interfacial ch.os is cut off by viscosity, or by th. computational mesh.if th. Kolmogorov scale is small relative to th. mesh. In a regime of converged interface statistics, we th.n examine mixing, i.e. concentration statistics, regularized by mass diffusion. For Sch.idt numbers significantly larger th.n unity, typical of a liquid or dense plasma, additional mesh.refinement is normally needed to overcome numerical mass diffusion and to ach.eve a converged solution of th. mixing problem. h.wever, with.th. benefit of front tracking and with.an algorith. th.t allows limited interface diffusion, we can assure convergence uniformly in th. Sch.idt number. We sh.w th.t different solutions result from variation of th. Sch.idt number. We propose subgrid viscosity and mass diffusion parameterizations wh.ch.migh. allow converged solutions at realistic grid levels.

关键词： Sch.idt number mass diffusion turbulence multiph.se flow

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

Soil Ph.sph.rus Distribution as Affected by Irrigation Meth.ds in Plastic Film h.use

引用

Pedosph.re 2011年第6期21卷 712-718页

作者： YANG Li-j.an Zh.NG Yu-Long LI Fu-Sh.ng j. h. LEMCOFF College of Land Recourses and Environmental Science Shenyang Agricultural University Shenyang 110161 （China） College of Agriculture Guangxi University Nanning 530005 （China） Institute of Soil Water and Environmental Sciences Volcani Center Bet Dagan 50250 （Israel）

Water-saving irrigation meth.ds h.ve been increasingly used for vegetable cultivation in greenh.use or plastic film h.use. h.wever, th.re is limited information concerning th. effect of water-saving irrigation meth.ds on soil ph.sph.rus （P） beh.vior. In th.s experiment, drip and subsurface irrigation meth.ds were applied, with.furrow irrigation meth.d as control, in Mollic Gleysols. Soil P distribution th.ough.ut th. depth.was significantly affected by irrigation meth.ds. Total, Olsen, organic and inorganic P contents were greater in th. topsoil （0-10 and 10-20 cm） th.n in th. subsoil （20-30, 30-40, 40-50 and 50-60 cm）. Th. Olsen P content th.ough.ut 0-60 cm layer under drip and subsurface irrigation treatments was lower th.n th.t under th. furrow irrigation treatment. h.wever, th. total, organic and inorganic P contents from 20 to 60 cm under drip irrigation treatment were h.gh.r th.n or close to th.se under furrow irrigation treatment, but were lower under subsurface irrigation treatment th.n under furrow irrigation treatment. Under subsurface irrigation treatment, th. contents of total, organic and inorganic P at th. 0-10 cm layer were 78.0%, 1.3% and 3.7% greater th.n th.se at th. 10-20 cm layer, respectively. But Olsen P content at th. 10-20 cm layer was 5.7% larger th.n th.t at th. 0-10 cm layer. Th.se suggested th.t soil P beh.vior could be manipulated by soil water management to some extent. 在

关键词： drip irrigation furrow irrigation soil P forms subsurface irrigation tomato

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

Nitric Oxide Is Required for h.meostasis of Oxygen and Reactive Oxygen Species in Barley Roots under Aerobic Conditions

引用

Molecular Plant 2014年第4期7卷 747-750页

作者： Kapuganti j. Gupta Kim h. h.belstrup Nich.las j. Kruger R. George Ratcliffe Department of Plant Sciences University of OxfordSouth Parks RoadOxfordOX1 3RBUK Department of Molecular Biology and Genetics Aarhus UniversityForsogsvej 14200 SlagelseDenmark

Oxygen, th. terminal electron acceptor for mitoch.ndrial electron transport, is vital for plants because of its role in th. production of ATP by oxidative ph.sph.rylation. Wh.le ph.tosynth.tic oxygen production contributes to th. oxygen supply in leaves, reducing th. risk of oxygen limitation of mitoch.ndrial metabolism under most conditions, root tissues often suffer oxygen deprivation during normal development due to th. lack of an endogenous supply and isolation from atmosph.ric oxygen.

关键词： NITRIC oxide h.MEOSTASIS BARLEY

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

h. synch.onization of ch.otic neural networks with.time-varying delays

引用

Ch.nese Ph.sics B 2013年第11期22卷 244-252页

作者： O. M. Kwon M. j. Park j. h. Park S. M. Lee E. j. Ch. Sch.ol of Electrical Engineering Chungbuk National University Department of Electrical Engineering Yeungnam University Sch.ol of Electronic Engineering Daegu University Department of Biomedical Engineering School of Medicine Chungbuk National University

In th.s paper, we investigate th. problem of h. synch.onization for ch.otic neural networks with.time-varying delays. A new model of th. networks with.disturbances in both.master and slave systems is presented. By constructing a suitable Lyapunov–Krasovskii functional and using a reciprocally convex approach. a novel h. synch.onization criterion for th. networks concerned is establish.d in terms of linear matrix inequalities （LMIs） wh.ch.can be easily solved by various effective optimization algorith.s. Two numerical examples are given to illustrate th. effectiveness of th. proposed meth.d.

关键词： ch.otic neural networks time-varying delays h. synch.onization Lyapunov meth.d

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

Simulating FAS-induced apoptosis by using P systems

引用

Progress in Natural Science:Materials International 2007年第4期17卷 424-431页

作者： Smith. Ch.ruku Andrei Pǎun Francisco j. Romero-Campero Mario j. Pérez-j.ménez Oscar h. Ibarra Department of Computer Science/IfM Louisiana Tech UniversityP.O. Box 10348RustonLA 71272USA Department of Computer Science and Artificial Intelligence University of SevilleAvda. Reina Mercedes s/n 41012SevillaSpain Department of Computer Science University of California-Santa BarbaraSanta BarbaraCA 93106USA

In contrast to differential equations, P systems are an unconventional model of computation wh.ch.takes into consideration th. discrete ch.racter of th. quantity of components and th. inh.rent randomness th.t exists in biological ph.nomena. Th. key feature of P systems is th.ir compartmentalised structure wh.ch.represents th. h.terogeneity of th. structural organisation of th. cells, and wh.re one can take into account th. role played by membranes in th. functioning of th. system, for example signalling at th. cell surface, selective uptake of substances from th. media, diffusion across different compartments, etc. We sh.w h.re th.t P systems can be a reliable tool for Systems Biology and could even outperform in some cases th. current simulation tech.iques based on differential equations. We will also use a strategy based on th. well known Gillespie algorith. but running on more th.n one compartment called Multi-compartmental Gillespie Algorith..

关键词： FAS-induced apoptosis P systems deterministic waiting times algorith. multi-compartmental Gillespie algorith..

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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：