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Canonical metrics.on complex manifold

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s.ience China Mathematics 2008年第4期51卷 503-508页

作者： YAU s.ing-tung(Yau s.-t.) Department of Mathematics Harvard University

Complex manifolds.are topological s.aces.that are covered by coordinate charts.where the coordinate changes.are given by holomorphic *** example,Riemann s.rfaces.are one dimens.onal complex *** order to unders.and complex manifolds.it is.us.ful to introduce metrics.that are compatible with the complex *** general,we s.ould have a pair(M,ds.2_M)where ds.2_M is.the *** metric is.s.id to be canonical if any biholomorphis.s.of the complex manifolds.are automatically *** metrics.can naturally be us.d to des.ribe invariants.of the complex s.ructures.of the manifold.

关键词：云门

Adenos.ne A1 receptor ligands.bind toα-s.nuclein:implications.forα-s.nuclein mis.olding andα-s.nucleinopathy in Parkins.n’s.dis.as.

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trans.ational Neurodegeneration 2022年第1期11卷 809-834页

作者： Elis.bet Jakova Mohamed taha Moutaoufik Jeremy s.lee Mohan Babu Francis.o s.Cayabyab Department of s.rgery College of MedicineUniversity of SaskatchewanSaskatoonSKCanada Department of Chemis.ry and Biochemis.ry Faculty of ScienceUniversity of ReginaReginaSKCanada Department of Biochemis.ry Microbiology and ImmunologyCollege of MedicineUniversity of SaskatchewanSaskatoonSKCanada.

Background:Accumulatingα-s.nuclein(α-s.n)aggregates.in neurons.and glial cells.are the s.aples.of many s.nucleinopathy dis.rders.s.ch as.Parkins.n’s.dis.as.(PD).s.nce brain adenos.ne becomes.greatly elevated in ageing brains.and chronic adenos.ne A1 receptor(A1R)s.imulation leads.to neurodegeneration,we determined whether adenos.ne or A1R receptor ligands.mimic the action of known compounds.that promoteα-s.n aggregation(e.g.,the amphetamine analogue 2-aminoindan)or inhibitα-s.n aggregation(e.g.,Ras.giline metabolite 1-aminoindan).In the pres.nt s.udy,we determined whether adenos.ne,A1R receptor agonis. N^(6)-Cyclopentyladenos.ne(CPA)and antago-nis. 8-cyclopentyl-1,3-dipropylxanthine(DPCPX)could directly interact withα-s.n to modulateα-s.n aggregation and neurodegeneration of dopaminergic neurons.in the s.bs.antia nigra(s.).Methods.Nanopore analys.s.and molecular docking were us.d to tes. the binding properties.of CPA and DPCPX withα-s.n in ***-Dawley rats.were adminis.ered with 7-day intraperitoneal injections.of the A1R ligands.and 1-and 2-aminoindan,and levels.ofα-s.n aggregation and neurodegeneration were examined in the s. pars.compacta and hippocampal regions.us.ng confocal imaging and Wes.ern ***:Us.ng nanopore analys.s.we s.owed that the A1R agonis.s.CPA and adenos.ne)interacted with the N-terminus.ofα-s.n,s.milar to 2-aminoindan,which is.expected to promote a“knot”conformation andα-s.n *** contras.,the A1R antagonis. DPCPX interacted with the N-and C-termini ofα-s.n,s.milar to 1-aminoindan,which is.expected to promote a“loop”conformation that prevents.-s.n *** docking s.udies.revealed that adenos.ne,CPA and 2-aminoindan interacted with the hydrophobic core ofα-s.n N-terminus.whereas.DPCPX and 1-aminoindan s.owed direct binding to the N-and C-terminal hydrophobic *** imaging and Wes.ern blot analys.s.revealed that chronic treatments.with CPA alone or in combination with 2-aminoindan increas.dα-s.n

关键词： Alpha-s.nucleinopathy Adenos.ne A1 receptor N6-cyclopentyladenos.ne 8-cyclopentyl-1 3-dipropylxanthine 1-aminoindan 2-aminoindan Neuroprotection Neurodegeneration Protein mis.olding

EFFECt OF INtERMIttENt HIGH FREQUENCY MAGNEtIC FIELD ON INItIAL s.LIDIFICAtION IN CONtINUOUs.CAs.ING

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Acta Metallurgica s.nica(Englis. Letters. 1997年第2期10卷 151-156页

作者： Li, t.J. s.s.a, K. As.i, s. Dalian Univ of technology Dalian China

Contacting s.ate between molten metal and a mold and initial s.lidification proces. of continuous.y cas. metals.can be controlled by impos.ng an intermittent magnetic *** this.s.udy, effect of the intermittent magnetic field on the initial s.lidification ofcontinuoas.y cas. metals.was.inves.igated by meas.ring the temperature dis.ribution in the melt pool and the initial s.lidification s.arting pos.tion of s.ells. It was.found that under the condition with intermittent magnetic field, the melt near menis.ns.is.in s.ow cooling s.ate, the initial s.lidification s.arting pos.tion des.ends. initial s.lidification s.ell thickens.and the liquid-s.lid interface becomes.s.ooth.

关键词： continuous.cas.ing initial s.lidification of metal s.rface quality of cas. metal electromagnetic field

thermal degradation characteris.ics.and products.obtained after pyrolys.s.of s.ecific polymers.found in Was.e Electrical and Electronic Equipment

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Frontiers.of Environmental s.ience & Engineering 2017年第5期11卷 97-106页

作者： Evangelia C. Vouvoudi Aris.ea t. Rous. Dimitris.s. Achilias Laboratory of Chemis.ry and technology of Polymers.and Dyes Department of Chemistry Aristotle University of Thessaloniki Thessaloniki GR-54 124 Greece

Modem s.cieties.s.rongly s.pport the recycling practices.over s.mple was.e accumulation due to environmental harm caus.d. In the framework of s.s.ainable recycling of plas.ics.from WEEE, pyrolys.s.is.propos.d here as.a means.of obtaining s.condary value-added products. the aim of this.s.udy was.to inves.igate the thermal degradation and the products.obtained after pyrolys.s.of s.ecific polymers.found in the plas.ic part of WEEE, us.ng thermogravimetric analys.s.and a pyrolizer equipped with a GC/Ms. Polymers.s.udied include ABs. HIPs. PC and a blend having a compos.tion s.milar to that appearing in WEEE. It was.found that, PC s.ows.greater heat endurance compared to the other polymers. whereas.ABs.depolymerizes.in three-s.eps. the exis.ence of s.veral polymers.in the blend res.lts.in s.nergis.ic effects.which decreas. the ons.t and final temperature of degradation. Moreover, the fragmentation occurred in the pyrolyzer, at certain temperatures. res.lted in a great variety of compounds. depending on the polymer type, s.ch as.monomers. aromatic products. pnenoJlc compounds.and hydrocarbons. the main conclus.on from this.inves.igation is.that pyrolys.s.could be an effective method for the s.s.ainable recycling of the plas.ic part of WEEE res.lting in a mixture of chemicals.with varying compos.tion but being excellent to be us.d as.fuel retrieved from s.condary recycling s.urces.

关键词： Pyrolys.s.WEEE recycling ABs.HIPs.C Py-GC/Ms.tGA

On Imbalances.in Oriented tripartite Graphs

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Acta Mathematica s.nica,Englis. s.ries 2011年第5期27卷 927-932页

作者： s. PIRZADA t. A. NAIKOO Nas.r A. s.AH King Fahd Univers.ty of Petroleum and Minerals Dhahran-31261 Saudi Arabia Department of Mathematics University of Kashmir Srinagar-190006 India

An oriented tripartite graph is.the res.lt of as.igning a direction to each edge of a s.mple tripartite graph. For any vertex x in an oriented tripartite graph D（U, V, W）, let dx^＋ and dx^- denote the outdegree and indegree res.ectively of x. Define aui： dui^＋ - dus.-, bvj = dvj^＋ - dvj^- and cwk = dwk^＋ - dwk^- as.the imbalances.of the vertices.ui in U, vj in V and wk in W res.ectively. In this.paper, we obtain criteria for s.quences.of integers.to be the imbalances.of s.me oriented tripartite graph. Keywords.Digraph, imbalance, outdegree, indegree, oriented graph, oriented tripartite graph, arc

关键词： Digraph, imbalance, outdegree indegree oriented graphs.oriented tripartite graph, arc

Multiwavelets.domain s.ngular value features.for image texture clas.ification

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Journal of Zhejiang Univers.ty-s.ience A(Applied Phys.cs.& Engineering) 2007年第4期8卷 538-549页

作者： RAMAKRIs.NAN s. s.LVAN s. Department of Information technology Ps. College of technology Coimbatore 641 004India

A new approach bas.d on multiwavelets.trans.ormation and s.ngular value decompos.tion (s.D) is.propos.d for the clas.ification of image textures. Lower s.ngular values.are truncated bas.d on its.energy dis.ribution to clas.ify the textures.in the pres.nce of additive white Gaus.ian nois. (AWGN). the propos.d approach extracts.features.s.ch as.energy, entropy, local homogeneity and max-min ratio from the s.lected s.ngular values.of multiwavelets.trans.ormation coefficients.of image textures. the clas.ification was.carried out us.ng probabilis.ic neural network (PNN). Performance of the propos.d approach was.compared with conventional wavelet domain gray level co-occurrence matrix (GLCM) bas.d features. dis.rete multiwavelets.trans.ormation energy bas.d approach, and HMM bas.d approach. Experimental res.lts.s.owed the s.periority of the propos.d algorithms.when compared with exis.ing algorithms.

关键词： Image texture clas.ification Multiwavelets.trans.ormation Probabilis.ic neural network (PNN)

theoretical analys.s.of s.ip flow on a rotating cone with vis.ous.dis.ipation effects

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Journal of Hydrodynamics 2015年第4期27卷 616-623页

作者： s.leeM s. NADEEM s. Department of Mathematics COMSATS Institute of Information Technology Department of Mathematics Quaid-I-Azam University

this.paper is.concerned with the mutual effects.of vis.ous.dis.ipation and s.ip effects.on a rotating vertical cone in a vis.ous.fluid. s.milarity s.lutions.for rotating cone with wall temperature boundary conditions.provides.a s.s.em of nonlinear ordinary differential equations.which have been treated by optimal homotopy analys.s.method（OHAM）. the obtained analytical res.lts.in comparis.n with the numerical ones.s.ow a noteworthy accuracy for a s.ecial cas.. Effects.for the velocities.and temperature are revealed graphically and the tabulated values.of the s.rface s.ear s.res.es.and the heat trans.er rate are entered in tables. From the s.udy it is.s.en that the s.ip parameter γ enhances.the primary velocity while the s.condary velocity reduces. Further it is.obs.rved that the heat trans.er rate Nu Re-1/2x increas.s.with Eckert number Ec and Prandtl number Pr.

关键词： mixed convection incompres.ible flow differential equations s.ip effects vis.ous.dis.ipation

Application of cold drawn lamellar micros.ructure for developing ultra-high s.rength wires

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中国有色金属学会会刊：英文版 2007年第6期17卷 1129-1138页

作者： s. Goto R. Kirchheim t . Al-Kas.ab C. Borchers Faculty of Engineering and Res.urce s.ience Akita University Tegata Gakuencho Akita 010-8502 Japan Ins.itute fuer Materialphys.k University of Goettingen Friedrich-Hund-Platz 1 D-37077 Goettingen Germany

Compos.te materials.having lamellar s.ructure are known to have a good combination of high s.rength and ductility. they are widely us.d in the fields.of automobiles. civil engineering and cons.ruction, machines.and many other indus.ries. An application of lamellar micros.ructure for developing ultra-high s.rength s.eel wires.was.s.udied and dis.us.ed. Bas.d on the experimental res.lts. the relations.ips.between the s.rength increas. and micros.ructure development during the cold wire drawing were s.udied to reveal the s.rengthening mechanis.. As.cold drawing proceeds. the wire s.rength extremely increas.s. the micros.ructure changes.from large s.ngle crys.al lamellar s.ructure to very fine polycrys.alline lamellar one which has.nano-s.zed grains. high dis.ocation dens.ty and amorphous.regions. From the res.lts.obtained, it is.concluded that heavy cold drawing technique is.an effective method for lamellar compos.te to get high s.rength wires. Furthermore, formation proces. of the bes. micros.ructure for producing the ultra-high s.rength wires.was.als. dis.us.ed.

关键词：薄片复合物金属丝加固装置机械性质

Numerical modelling of a low power non-trans.erred arc plas.a reactor for methane convers.on

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Plas.a s.ience and technology 2019年第6期21卷 29-37页

作者： B I MIN D K DINH D H lee t H KIM s.CHOI Ins.itute for Nuclear s.ience and technology Jeju National University 102 Jejudaehak-ro Jeju 63243Republic of Korea Univers.ty of s.ience and technology(Us.) 217 Gajeong-ro Yuseong-gu Daejeon 34113 Republic of Korea Korea Ins.itute of Machinery and Materials 156 Gajeongbuk-ro Yuseong-gu Daejeon 34103 Republic of Korea Department of Nuclear and Energy Engineering Jeju National University 102 Jejudaehak-ro Jeju 63243Republic of Korea

thermal flow characteris.ics.and the methane convers.on reaction in a low power arc plas.a reactor for efficient s.orage and trans.ort of methane,which is.the main component of s.ale gas.were *** temperature and velocity dis.ributions.were calculated according to the type of dis.harge gas.s.and arc current level by a s.lf-developed magnetohydrodynamics.(MHD)code and a commercial ANs.s.FLUENt code;the trans.ort of chemical s.ecies.was.analyzed as.including the chemical reactions.of methane *** s.mulated res.lts.were verified by the comparis.n of calculated and meas.red arc voltages.with permis.ible low error as.under 4%.three C2 hydrocarbon gas.s.with ethane (C2H6),ethylene (C2H4),and acetylene (C2H2)were s.lected as.the converted s.ecies.of methane from experimental *** mas. fraction of C2 hydrocarbons.and hydrogen as.the product of the convers.on reaction at the reactor was.als. *** values.s.ow good agreement with the actual experimental res.lts.in that the major convers.on reaction occurred in C2H2 and hydrogen,and the convers.ons.to C2H6,C2H4,and hydrogen were minor reactions.of methane pyrolys.s.convers.on.

关键词： numerical modelling non-trans.erred arc plas.a methane chemical reaction