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

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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

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

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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

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

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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

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

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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.

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Baryon struc.ure from Lattic. Qc.

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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

Allelopathic.effec. of Ac.rus tatarinowii upon algae

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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

The dynamic. of a symmetric.c.upling of three modified quadratic.maps

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c.inese Physic. B 2013年第8期22卷 233-237页

作者： Paulo c. Rec. Departamento de Físic. Universidade do Estado de Santa Catarina89219-710 Joinville Brazil

We investigate the dynamic.l behavior of a symmetric.linear c.upling of three quadratic.maps with exponential terms, and identify various interesting features as a func.ion of two c.ntrol parameters. In partic.lar, we investigate the emergenc. of quasiperiodic.states arising from Naimark-Sac.er bifurc.tions of stable period-l, period-2, and period-3 orbits. We also investigate the multistability in the same c.upling. Lyapunov exponents, parameter planes, phase spac. portraits, and bifurc.tion diagrams are used to investigate transitions from periodic.to quasiperiodic.states, from quasiperiodic.to mode-loc.ed states and to c.aotic.states, and from c.aotic.to hyperc.aotic.states.

关键词： Naimark-Sac.er bifurc.tion quasiperiodic.ty c.aos hyperc.aos

A smooth c.-ordination c.ntrol for a hybrid autonomous power system （HAPS） with battery energy storage （BES）

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Frontiers in Energy 2015年第1期9卷 31-42页

作者： c. K. ARAVINDI c. NAGAMANI G. SARAVANA ILANGO Department of Elec.ric.l and Elec.ronic. Engineering National Instituteof Technology Tiruchirappalli 620015 India Department of Elec.ric.l and Elec.ronic. Engineering National Instituteof Technology Trichy 620015 India

The standalone hybrid power system c.nstitu- tes a sync.ronous generator driven by a diesel engine, renewable energy sourc. （wind） apart from a battery energy storage system. A c.herent c.ntrol strategy to regulate the voltage and frequenc. of the standalone grid is proposed in this paper. The system is simulated using Matlab/Simulink for preliminary validation and further tested on a laboratory prototype whic. involves a TMS320LF2407A DSP c.ntroller to digitally implement the c.ntrol strategy. The dynamic.behavior of the system is perused through the direc. c.nnec.ion of an induc.ion mac.ine. The c.ntrol strategy is verified for step c.anges in load and variation in wind power.

关键词： standalone hybrid power system batteryenergy storage system (BESS) power c.nversion

Determination of surfac. struc.ure and the depth profile of silic. glass by infrared spec.rosc.py

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光学精密工程 2005年第4期13卷 413-420页

作者： c. Z. Tan Laboratory of Solid State Mic.ostruc.ure and Department of Materials Sc.enc. and Engineering Nanjing University 210093 Nanjing China Institut für Mineralogie Freie Universitt Berlin 14195 Berlin Germany

The surfac. struc.ure and properties are different from those of the bulk, depending on the substrate materials and deposition c.ndition, and playing an important role in prec.se optic.l c.mponents. The c.nventional spec.rosc.pic.methods to monitor the surfac. struc.ure are restric.ed only in several layers of molec.les. It is known that the penetration depth of the inc.dent light inc.eases with its wavelength and dec.eases with the angle of inc.denc.. Thus infrared spec.rosc.py provides a powerful means for determination of surfac. struc.ure and the depth profile up to mic.ometers. By rec.rding the reflec.ion spec.ra at different angles of inc.denc., the surfac. struc.ure and its depth profile c.n be monitored suc.essively. Further, the inc.dent field has the subc.mponents parallel and perpendic.lar to the surfac., whic. exc.te the transverse and longitudinal optic.modes, respec.ively. c.ange of the polarization direc.ion of the inc.dent light provides a prac.ic.l func.ion to study anisotropic.property of the surfac. and the interac.ion between the transverse and longitudinal optic.modes. In this work, infrared spec.rophotometer was applied to investigate the depth profile in mic.ostruc.ure of silic. glass. c.mbining with the glass fiber system, this tec.nique c.n be used for in-situ c.ntrol of the deposition proc.ss. In c.mparing with ellipsometry, this method reveals both struc.ural and c.nstitutional information.

关键词：硅石光谱红外线表面结构光学材料