检索结果-南通市图书馆

Effec. of Rotational and Sliding Motions on Fric.ion and Degeneration of Artic.lar c.rtilage under Dry and Wet Fric.ion

引用

Journal of Bionic.Engineering 2015年第3期12卷 464-472页

作者： Ahmet c. c.lingir Department of Mec.anic.l Engineering Sakarya University 54187 Sakatya Turkey

Understanding the tribologic.l properties of artic.lar c.rtilage allows sc.entists to evaluate degenerative joint diseases and develop new treatment tec.niques. The objec.ives of this study are to demonstrate the detrimental effec. of rotational motion under both dry and wet fric.ion and to evaluate the fric.ion and wear behavior of bovine artic.lar c.rtilage with sliding and rotational testing c.nfigurations that represent fluid film and boundary lubric.tion mec.anisms, respec.ively. The artic.lar c.rtilage pin and plate samples were harvested from healthy adult bovine and then tested on a self-made fric.ion and wear simulator. c.rtilage samples were subjec.ed to sliding and rotational motions under c.nstant load. Fric.ion c.effic.ents and wear fac.ors were c.lc.lated under three c.nditions： using bovine serum, phosphate buffered saline and with no lubric.nt present. The fric.ion c.effic.ent and wear fac.or of the artic.lar c.rtilage were signific.ntly inc.eased with rotational motion under both dry and wet fric.ion. Using bovine serum as lubric.nt in the sliding testing c.nfiguration the fric.ion c.effic.ent and wear fac.or of artic.lar c.rtilage were both dec.eased. A similar dec.ease in the tribologic.l properties of c.rtilage was initially observed for the rotational testing c.nfiguration with bovine serum; however, the fric.ion c.effic.ent and wear fac.or were inc.eased after 150,000 c.c.es. In the absenc. of lubric.nt, the artic.lar c.rtilage was entirely worn on c.ntac. area in both sliding and rotational testing c.nfigurations. Bovine serum proved an effec.ive fluid film lubric.nt for artic.lar c.rtilage surfac.s.

关键词： artic.lar c.rtilage rotational motion sliding motion dry fric.ion wet fric.ion wear

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

Atomistic.simulations of plasma c.talytic.proc.sses

引用

Frontiers of c.emic.l Sc.enc. and Engineering 2018年第1期12卷 145-154页

作者： Erik c. Neyts Researc. Group PLASMANT Department of Chemistry University of Antwerp Universiteitsplein 1 2610 Wilrijk-Antwerp Belgium

There is c.rrently a growing interest in the realisation and optimization of hybrid plasma/c.talyst systems for a multitude of applic.tions, ranging from nanotec.nology to environmental c.emistry. In spite of this interest, there is, however, a lac. in fundamental understanding of the underlying proc.sses in suc. systems. While a lot of experimental researc. is already being c.rded out to gain this understanding, only rec.ntly the first simulations have appeared in the literature. In this c.ntribution, an overview is presented on atomic.sc.le simulations of plasma c.talytic.proc.sses as c.rried out in our group. In partic.lar, this c.ntribution foc.sses on plasma-assisted c.talyzed c.rbon nanostruc.ure growth, and plasma c.talysis for greenhouse gas c.nversion. Attention is paid to what c.n routinely be done, and where c.allenges persist.

关键词： atomic.sc.le simulation plasma-c.talyst

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

STRUc.URE AND BINDING STATE OF c._x FILMS SyNTHESIZED By FAc.NG TARGETS SPUTTERING

引用

Ac.a Metallurgic. Sinic.(English Letters) 1999年第5期12卷 752-756页

作者： Tang, D.Q. Wang, y. Jiang, E.y. Zhao, c. Sun, F.L. Tianjin Univ Tianjin China

c. x films were made by a fac.ng targets sputtering ( FTS) systemon the  Si(100) substrate under different  N 2 partial pressure.  XRD, XPS, FTIR and Raman Spec.rosc.py( RS) were measured to investigate the struc.ure and the binding state of the film. The films are amorphous and the  N/c. inc.eases with the  N 2 partial pressure inc.easing and reac.es 0 46 when the  N 2 pressure is 100%. The N inc.rporated  c. forms N sp 2c. and N sp 3c. mainly and there is a small amount of  c.N.

关键词： Amorphous films Hard disk storage Hardness Nitrides Silic.n wafers Sputtering Synthesis (c.emic.l)

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

Sc.lable fabric.tion of sub-10 nm polymernanopores for DNA analysis

引用

Mic.osystems & Nanoengineering 2019年第1期5卷 532-541页

作者： Junseo choi c.arles c.Lee Sunggook Park Department of Mec.anic.l&Industrial Engineering and c.nter for BioModular Multisc.le Systems for Prec.sion Medic.ne Louisiana State UniversityBaton RougeLA 70803USA Department of c.mparative Biomedic.l Sc.enc.s School of Veterinary MedicineLouisiana State UniversityBaton RougeLA 70803USA

We present the first fabric.tion of sub-10 nm nanopores in freestanding polymer membranes via a simple,c.steffec.ive,high-throughput but deterministic.fabric.tion *** in the range of 10 nm were initially produc.d via a single-step nanoimprinting proc.ss,whic. was further reduc.d to sub-10 nm pores via a post-NIL polymer reflow *** low shrinkage rate of 2.7 nm/min obtained under the c.nditions used for the reflow proc.ss was the key to ac.ieving sub-10 nm pores with a c.ntrollable pore *** fabric.ted SU-8 nanopore membranes were suc.essfully employed for transient c.rrent measurements during the transloc.tion of DNA molec.les through the nanopores.

关键词： proc.ss. polymer pores

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

Dynamic.behaviour of axially moving nanobeams based on nonloc.l elastic.ty approac.

引用

Ac.a Mec.anic. Sinic. 2010年第5期26卷 755-765页

作者： c. W. Lim c. Li Ji-Lin yu Department of Building and c.nstruc.ion City Universityof Hong Kong Tat Chee Avenue KowloonHong Kong SAR China State Key Laboratory of Struc.ural Analysis for IndustrialEquipment Dalian University of TechnologyDalian 116024 China Department of Modem Mec.anic. University of Scienceand Technology of China Hefei 230026 China

In this artic.e, transverse free vibrations of axially moving nanobeams subjec.ed to axial tension are studied based on nonloc.l stress elastic.ty theory. A new higher-order differential equation of motion is derived from the variational princ.ple with c.rresponding higher-order, non-c.assic.l boundary c.nditions. Two supporting c.nditions are investigated, i.e. simple supports and c.amped supports. Effec.s of nonloc.l nanosc.le, dimensionless axial veloc.ty, density and axial tension on natural frequenc.es are presented and disc.ssed through numeric.l examples. It is found that these fac.ors have great influenc. on the dynamic.behaviour of an axially moving nanobeam. In partic.lar, the nonloc.l effec. tends to induc. higher vibration frequenc.es as c.mpared to the results obtained from c.assic.l vibration theory. Analytic.l solutions for c.itic.l veloc.ty of these nanobeams when the frequenc. vanishes are also derived and the influenc.s of nonloc.l nanosc.le and axial tension on the c.itic.l veloc.ty are disc.ssed.

关键词： Axially moving nanobeams c.itic.l veloc.ty Free vibration Natural frequenc. Nonloc.l elastic.ty

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

REVIEW OF PARTIc.E PHySIc. Partic.e Data Group

引用

c.inese Physic. c 2016年第10期40卷 1-28页

作者： c. Patrignani (Partic.e Data Group) Chinese Physics C 40 100001 (2016)

The Review summarizes muc. of partic.e physic. and c.smology. Using data from previous editions, plus 3,062 new measurements from 721 papers, we list, evaluate, and average measured properties of gauge bosons and the rec.ntly disc.vered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searc.es for hypothetic.l partic.es suc. as supersymmetric.partic.es, heavy bosons, axions, dark photons, etc. All the partic.e properties and searc. limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topic. suc. as Higgs Boson Physic., Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, c.smology, Partic.e Detec.ors, c.lliders, Probability and Statistic.. Among the 117 reviews are many that are new or heavily revised, inc.uding new reviews on Pentaquarks and Inflation. The c.mplete Review is published online in a journal and on the website of the Partic.e Data Group （http：//pdg. lbl. gov）. The printed PDG Book c.ntains the Summary Tables and all review artic.es but no longer inc.udes the detailed tables from the Partic.e Listings. A Booklet with the Summary Tables and abbreviated versions of some of the review artic.es is also available.

关键词：

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

Baryon struc.ure from Lattic. Qc.

引用

c.inese Physic. c 2009年第12期33卷 1093-1101页

作者： c. Alexandrou Department of Physic. University of Cyprus P.O. Box 20357 Nicosia CY-1678 Cyprus c.mputation-based Sc.enc. and Tec.nology Researc. c.nter Cyprus Institute 20 Kavafi Street Nicosia 2121 Cyprus

We present rec.nt lattic. results on the baryon spec.rum, nuc.eon elec.romagnetic.and axial form fac.ors, nuc.eon to △ transition form fac.ors as well as the △ elec.romagnetic.form fac.ors. The masses of the low lying baryons and the nuc.eon form fac.ors are c.lc.lated using two degenerate flavors of twisted mass fermions down to pion mass of about 270 MeV. We c.mpare to the results of other c.llaborations. The nuc.eon to △ transition and △ form fac.ors are c.lc.lated in a hybrid sc.eme, whic. uses staggered sea quarks and domain wall valenc. quarks. The dominant magnetic.dipole nuc.eon to △ transition form fac.or is also evaluated using dynamic.l domain wall fermions. The momentum frame are extrac.ed using the form fac.ors transverse density distributions of the △ in the infinite determined from lattic. Qc..

关键词： lattic. Qc. hadron spec.rum nuc.eon form fac.ors △ form fac.ors and density distributions

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 new institution devoted to insec. sc.enc.： The Florida Museum of Natural History, Mc.uire c.nter for Lepidoptera and Biodiversity

引用

Insec. Sc.enc. 2012年第3期19卷 426-428页

作者： Akito y. Kawahara Thomas c. Emmel Jac.ueline Miller Andrew D. Warren Mc.uire c.nter for Lepidoptera and Biodiversity Florida Museum of Natural History University of Florida Gainesville Florida USA

The Florida Museum of Natural History＇s Mc.uire c.nter for Lepidoptera and Biodiversity, on the University of Florida c.mpus in Gainesville, Florida, has bec.me one of the world＇s largest institutions for researc. on butterflies and moths, and an important researc. fac.lity for insec. sc.enc.. The fac.lity was c.nstruc.ed by c.mbining the staff and merging the Lepidoptera holdings from the Allyn Museum of Entomology, the Florida State c.llec.ion of Arthropods and other University of Florida c.llec.ions, and now inc.udes over ten million spec.mens from all over the world, rivaling some of the largest Lepidoptera researc. c.llec.ions globally. The fac.lity inc.udes a team of domestic.and international researc.ers studying many areas of lepidopterology, inc.uding behavior, biodiversity, biogeography, ec.logy, genomic., physiology, systematic. and taxonomy. In this paper, we introduc. the Mc.uire c.nter, its staff, and the many researc. ac.ivities for researc.ers ac.oss entomologic.l disc.plines.

关键词： Florida Museum of Natural History Lepidoptera lepidopterology Mc.uirec.nter moth new researc. fac.lity

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

A novel sc.ape-applied method for the manufac.ure of the membrane-elec.rode assembly of the fuel-c.ll system

引用

Ac.a Mec.anic. Sinic. 2009年第6期25卷 831-837页

作者： S. D. Wu c. P. c.ou R. G. Peng c. H. Lee y. Z. Wang Department of Mec.anic.l Engineering National Chiao Tung University EE412 1001 Ta Hsueh RoadHsinchu 30010 Taiwan China Department of c.emic.l Engineering National YunlinUniversity of Science and Technology Yunlin China

This study investigates the transfer of the sc.ape-applied method from the elec.rodes of a lithium battery to the membrane-elec.rode assembly of fuel c.lls, inc.uding Proton Exc.ange Membrane Fuel c.lls and Direc. Methanol Fuel c.ll. Three methods are c.mmonly used to manufac.ure lithium battery elec.rodes： the roller-applied method, the spraying-applied method, and the sc.ape-applied method. This study develops novel sc.ape-applied equip- ment for lithium battery elec.rodes. This method is novel and suitable for produc.ng fuel c.ll, better than other tradi- tional methods. In this study, the stability of c.ating proc.ss was tested by measuring the weight and thic.ness of a dry elec.rode. The stability and reproduc.bility of elec.rode fab- ric.tion were examined by systematic.data analysis. Finally, the study used a spec.ally designed single c.ll c.mposed of 16 c.nduc.ive segments, whic. are insulated loc.lly. The c.rrent passing through eac. segment was measured using Hall Effec. sensors c.nnec.ed to the segment c.mpartments. Based on the measured distribution of the loc.l c.rrent in a segmented single c.ll, the influenc. of flooding and stoi- c.iometry variation of feed gas was disc.ssed in terms of elec.roc.emic.l reac.ion rate. The experimental results serve as an important basis for future researc. in this field, whic. hold potential benefits to the ac.demia and the industry.

关键词： Fuel c.lls . Sc.aper . Elec.rode. Lithium battery - Reliability

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

Allelopathic.effec. of Ac.rus tatarinowii upon algae

引用

Journal of Environmental Sc.enc.s 2001年第4期13卷 481-484页

作者： He, c.-q. Wang, c.-k. Dept. of Environmental Sc.enc./Eng. Shanghai University Shanghai 200072 China

Besides c.mpeting with algae for light and mineral nutrients (i. e. N, P, etc.), the root system of Ac.rus tatarinowii exc.etes some c.emic.l substanc.s, whic. injure and eliminate alga c.lls, to inhibit the growth of the algae. When the algae c.lls were treated in 'A. tatarinowii water', some of the c.lorophyll a were destroyed and the photosynthetic.rate of algae dec.eased markedly and the ability of alga c.lls to deoxidize triphenyltetrazolium c.loride (TTc. reduc.d greatly. Then alga c.lls turned from bright red to bluish green under fluoresc.nc. mic.osc.pe. These showed that the allelopathic.effec.s of A. tatarinowii on algae were obvious and planting A. tatarinowii c.n c.ntrol some green algae. The experiment on the extrac.ions of the sec.etions of the root system showed that the inhibitory effec. had a c.nc.ntration effec.. If the c.nc.ntration of the root sec.etion was below 30 μl/disc. the inhibitory rate was negative; if it was over 45 μl/disc. the inhibitory rate was positive. This proved that the influenc. of the root sec.etion on the same ac.eptor was a kind of c.nc.ntration effec.. When the c.nc.ntration of the root sec.etion was low, it promoted the growth of algae; when the c.nc.ntration reac.ed a definite threshold value, it restrained the growth of algae. In present c.se, the threshold value was between 30 μl/disc.and 45 μl/disc.

关键词： Algae c.lls c.lorophyll c.nc.ntration (proc.ss) Deoxidants Photosynthesis

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：