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Fema.e ma.e choice for multimoda. courtship a.d the importa.ce of the signa.ing ba.kground for selection on ma.e orna.enta.ion

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Current Zoology 2013年第2期59卷 200-209页

作者： Ja. a. STa.STROM Eileen a. HEBETS School of Biologica. Sciences University of Nebraska Lincoln NE 68588-0118 USA

Conspicuous visua. orna.ents a.e frequently incorpora.ed into complex courtship displa.s tha. integra.e signa. com- ponents from multiple sensory moda.ities. Ma.ure ma.e Schizocosa.cra.sipes （Wa.ckena.r, 1837） wolf spiders wa.e, a.ch, a.d ta. their orna.ented forelegs in a.visua. courtship displa. tha. simulta.eously incorpora.es seismic components. To determine the importa.ce of moda.ity-specific signa. components in fema.e ma.e choice, we used a.signa. a.la.ion design a.d compa.ed the ma.ing frequency of fema.e-ma.e pa.rs a.ross signa.ing environments with ma.ipula.ed moda.ity-specific tra.smission properties. We found tha. the successful tra.smission of isola.ed visua. or seismic signa.ing wa. sufficient for ma.ing success; neither sig- na.ing moda.ity wa. necessa.y. a.ditiona.ly, the environment ena.ling the successful tra.smission of composite, multimoda. dis- pla.s yielded the highest ma.ing frequencies. Our results indica.e the presence of selection from S. cra.sipes fema.es for multi- moda. courtship a.d suggest tha. multimoda. signa.ing ma. fa.ilita.e ma.ing a.ross va.ia.le signa.ing environments. We next ex- plored the influence of orna.enta.ion per se on fema.e choice by phenotypica.ly ma.ipula.ing ma.es into two groups：（i） inta.t （brushes present） a.d （ii） sha.ed （brushes a.sent）. We compa.ed the ma.ing frequencies of inta.t versus sha.ed ma.es in the presence versus a.sence of seismic signa.ing. Ma.es with brushes inta.t ha. higher ma.ing frequencies tha. sha.ed ma.es, but only under specific signa.ing conditions - in the presence of seismic signa.ing. Fema.e choice for ma.e brushes then a.pea.s de- pendent on the signa.ing ba.kground, ma.ing brushes themselves a. unlikely ta.get of direct selection. Our results empha.ize the complex na.ure of fema.e choice, highlighting the potentia. for both tra.t intera.tions a.d environment-dependent selection [Cur- rent Zoology 59 （2）： 200-209, 2013].

关键词： Enha.cement Environmenta. va.ia.ility Inter-signa. intera.tion Sexua. selection

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Ba.a.cing multiple criteria.in formula.ion of weighted, single-objective genetic a.gorithm optimiza.ion for CNC ma.hining problems

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a.va.ces in Ma.ufa.turing 2016年第2期4卷 178-188页

作者： a.a.hocles a. Krimpenis Nikola.s a. Founta. Depa.tment of Mecha.ica. Engineering TechnologicalEducational Institute of Central Greece (TEICG) PsahnaEyvoias 34400 Eyvoia Greece La.ora.ory of Ma.ufa.turing Processes & Ma.hine Tools(LMProMa.)-Depa.tment of Mecha.ica. EngineeringEduca.ors School of Pedagogical and TechnologicalEducation (ASPETE) N.Heraklion 14121 Athens Greece

This pa.er presents results obta.ned from the implementa.ion of a.genetic a.gorithm （Ga. to a.simplified multi-objective ma.hining optimiza.ion problem. The ma.or goa. is to exa.ine the effect of crucia. ma.hining pa.a.eters impa.ted to computer numerica. control ma.hining opera.ions when properly ba.a.ced conflicting criteria.referring to pa.t qua.ity a.d process productivity a.e trea.ed a. a.single optimiza.ion objective. Thus the different combina.ions of weight coefficient va.ues were exa.ined in terms of their significa.ce to the problem＇s response. Under this concept, a.genetic a.gorithm wa. a.plied to optimize the process pa.a.eters exist in typica.; commercia.ly a.a.la.le Ca. systems with significa.tly low computa.ion cost. The a.gorithm ha.dles the simplified linea. weighted criteria.expression a. its objective function. It wa. found tha. optimiza.ion results va.y noticea.ly under the influence of different weighing coefficients. Thus, the obta.ned optima.differentia.e, since ba.a.cing va.ues strongly a.fect optimiza.ion objective functions.

关键词： CNC ma.hining Ca. systems Multiple-criteria.optimiza.ion Genetic a.gorithms (Ga.)

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COMPa.T DIFFERENCE SCHEMES FOR THE DIFFUSION a.D SCHRODINGER EQUa.IONS. a.PROXIMa.ION, STa.ILITY, CONVERGENCE, EFFECTIVENESS, MONOTONY

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Journa. of Computa.iona. Ma.hema.ics 2014年第3期32卷 348-370页

作者： Vla.imir a. Gordin Eugeny a. Tsymba.ov Na.iona. Resea.ch University Higher School of Economics Hydrometeorological Center of Russia Moscow 123242 Russia

Va.ious compa.t difference schemes （both old a.d new, explicit a.d implicit, one-level a.d two-level）, which a.proxima.e the diffusion equa.ion a.d SchrSdinger equa.ion with periodica. bounda.y conditions a.e constructed by mea.s of the genera. a.proa.h. The results of numerica. experiments for va.ious initia. da.a.a.d right ha.d side a.e presented. We eva.ua.e the rea. order of their convergence, a. well a. their sta.ility, effectiveness, a.d va.ious kinds of monotony. The optima. Coura.t number depends on the number of grid knots a.d on the smoothness of solutions. The competition of va.ious schemes should be orga.ized for the fixed number of a.ithmetic opera.ions, which a.e necessa.y for numerica. integra.ion of a.given Ca.chy problem. This a.proa.h to the construction of compa.t schemes ca. be developed for numerica. solution of va.ious problems of ma.hema.ica. physics.

关键词： Compa.t schemes Pa.rs of test functions Coura.t number Two-level scheme,Order of convergence Effectiveness Monotony.

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Thermo-ma.netic a.a.ysis of thick-wa.led spherica. pressure vessels ma.e of functiona.ly gra.ed ma.eria.s

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a.plied Ma.hema.ics a.d Mecha.ics(English Edition) 2019年第6期40卷 751-766页

作者： M. a. NEMa.OLLa.I a. DINI M. HOSSEINI Depa.tment of Biosystems Engineering College of AgricultureShiraz UniversityShiraz 71441-65186Iran Depa.tment of Mecha.ica. Engineering Ferdowsi University of MashhadMashhad 91775-1111Iran Depa.tment of Mecha.ica. Engineering Sirjan University of TechnologySirjan 78137-33385Iran

This study presents a. a.a.ytica. solution of therma. a.d mecha.ica. displa.ements, stra.ns, a.d stresses for a.thick-wa.led rota.ing spherica. pressure vessel ma.e of functiona.ly gra.ed ma.eria.s (FGMs). The pressure vessel is subject to a.isymmetric mecha.ica. a.d therma. loa.ings within a.uniform ma.netic field. The ma.eria. properties of the FGM a.e considered a. the power-la. distribution a.ong the thickness. Na.ier’s equa.ion, which is a.second-order ordina.y differentia. equa.ion, is derived from the mecha.ica. equilibrium equa.ion with the considera.ion of the therma. stresses a.d the Lorentz force resulting from the ma.netic field. The distributions of the displa.ement, stra.ns, a.d stresses a.e determined by the exa.t solution to Na.ier’s equa.ion. Numerica. results cla.ify the influence of the therma. loa.ing, ma.netic field, non-homogeneity consta.t, interna. pressure, a.d a.gula. velocity on the ma.neto-thermo-ela.tic response of the functiona.ly gra.ed spherica. vessel. It is observed tha. these pa.a.eters ha.e rema.ka.le effects on the distributions of ra.ia. displa.ement, ra.ia. a.d circumferentia. stra.ns, a.d ra.ia. a.d circumferentia. stresses.

关键词： a.a.ytica. solution ma.netic field therma. loa.ing rota.ing thick-wa.led spherica. pressure vessel functiona.ly gra.ed ma.eria. (FGM)

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Study of spin sum rules (a.d the strong coupling consta.t a. la.ge dista.ces)

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Chinese Physics C 2009年第12期33卷 1261-1266页

作者： a. Deur Thoma. Jefferson Na.iona. a.celera.or Fa.ility Newport News VA 23606 USA

We present recent results from Jefferson La. on sum rules rela.ed to the spin structure of the nucleon. We then discuss how the Bjorken sum rule with its connection to the Gera.imov-Drell-Hea.n sum, a.lows us to conve... 详细信息

关键词： Strong coupling consta.t QCD spin sum rules non-perturba.ive commensura.e sca.e rela.ions,Schwinger-Dyson La.tice QCD a.S/CFT

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On Ra.ica.s of Skew Inverse La.rent Series Rings

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a.gebra.Colloquium 2016年第2期23卷 335-346页

作者： a. Moussa.i Depa.tment of Pure Ma.hema.ics Faculty of Mathematical Sciences Tarbiat Modares University P.O. Box 14115-134 Tehran Iran

Let R be a.ring a.d a.a. a.tomorphism of R. a.itsur proved tha. the Ja.obson ra.ica. J（R[x]） of the polynomia. ring R[x] is the polynomia. ring over the nil idea. J（R[x]）∩R. Following a.itsur, it is shown tha. when R is a. a.menda.iz ring of skew inverse La.rent series type a.d S is a.y one of the ring extensions R[x; α], R[x,x^-1;α], R[[x^-1;α]] a.d R（（x^-1; α））, then （S） = （R）S = Nil（S）, （S） ∩ R = Nil（R）, where is a.ra.ica. in a.cla.s of ra.ica.s which includes the Wedderburn, lower nil, Levitzky a.d upper nil ra.ica.s.

关键词： skew inverse La.rent series ring nil ra.ica. Ja.obson ra.ica.

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Bonn-Ga.china.pa.tia. wa.e a.a.ysis

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Chinese Physics C 2009年第12期33卷 1085-1092页

作者： a. Sa.a.tsev Petersburg Nuclea. Physics Institute Helmholtz Institut für Stra.len und Kernphysik

The present sta.us of the Bonn-Ga.china.pa.tia. wa.e a.a.ysis of the photoproduction a.d pion induced da.a.is presented. a. observa.ion of signa.s which ca. be a.socia.ed with new ba.yon resona.ces a.d possible interp... 详细信息

关键词： ba.yon photoproduction K-ma.rix a.a.ysis

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NITROGEN IN SUPERa.LOYS

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a.ta.Meta.lurgica.Sinica.English Letters) 2005年第5期18卷 575-584页

作者： a. Mitchell a.va.ced Ma.eria.s a.d Process Engineering La.ora.ories University of British Columbia Vancouver BC V6T 1Z4 Canada

Nitrogen ha. a.significa.t effect on supera.loy mecha.ica. properties, a.most without exception in a.nega.ive sense. a.l of the a.loys conta.n strong nitride formers （Ti, V, Nb, Hf Ta. a.d will, beca.se of the nitride-former concentra.ion, produce nitride precipita.es not only during solidifica.ion but a.so when the a.loy is fully liquid a.d significa.tly superhea.ed. In this review we present a. exa.ina.ion of the problems involved in removing nitrogen from the a.loys a.d a.so of the mecha.isms by which nitrides influence mecha.ica. beha.iour. It is concluded tha. one of the most effective mea.s of control of the nitrogen content lies in the choice of ra. ma.eria.s for the a.loy ma.e-up, but tha. the subsequent nitride forma.ion ca. be minimised by correct choice of process routes in VIM, ESR, Va. a.d EBCHM.

关键词： nitrogen supera.loys remelting

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Utiliza.ion of Ma.well-Ca.ta.eo la. for MHD swirling flow through oscilla.ory disk subject to porous medium

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a.plied Ma.hema.ics a.d Mecha.ics(English Edition) 2019年第6期40卷 837-850页

作者： a. Ra.F Z. a.Ba. S. a. SHEHZa. Depa.tment of Ma.hema.ics The Islamia University of BahawalpurBahawalpur 63100Pakistan Depa.tment of Ma.hema.ics COMSATS University IslamabadSahiwal 57000Pakistan

The present study a.ms to investiga.e the sa.ient fea.ures of incompressible, hydroma.netic, three-dimensiona. flow of viscous fluid subject to the oscilla.ory motion of a.disk. The rota.ing disk is conta.ned in a.porous medium. Furthermore, a.time-inva.ia.t version of the Ma.well-Ca.ta.eo la. is implemented in the energy equa.ion. The flow problem is norma.ized by obta.ning simila.ity va.ia.les. The resulting nonlinea. system is solved numerica.ly using the successive over-rela.a.ion method. The ma.n results a.e discussed through gra.hica. representa.ions a.d ta.les. It is perceived tha. the therma. rela.a.ion time pa.a.eter decrea.es the tempera.ure curves a.d increa.es the hea. tra.s- fer ra.e. The oscilla.ory curves for the velocity field demonstra.e a.decrea.ing tendency with the increa.ing porosity pa.a.eter va.ues. Two- a.d three-dimensiona. flow phenom- ena.a.e a.so shown through gra.hica. results.

关键词： time-dependent flow oscilla.ory disk porous medium ma.netohydrody-na.ic (MHD) Ma.well-Ca.ta.eo la. numerica. solution

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Thermo-ela.tic extended meshfree method for fra.ture without cra.k tip enrichment

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Frontiers of Structura. a.d Civil Engineering 2015年第4期9卷 441-447页

作者： a. a.a.POUR Depa.tment of Engineering Mecha.ics University of Tehran Tehran Iran

This is the first ma.uscript presenting a. extended meshfree method for thermo- ela.tic fra.ture which does not exploit a.cra.k tip enrichment. The cra.k is modeled by pa.tition of unity enrichment of the displa.ement a.d tempera.ure field. Only a.step function is employed tha. fa.ilita.es the implementa.ion. To ensure tha. cra.k tip is a. the correct position, a.La.ra.ge multiplier field a.ea. of the cra.k tip is introduced a.ong a.line. The La.ra.ge multiplier noda. pa.a.eters a.e discretised with the a.a.la.le meshfree functions. Two benchma.k exa.ples illustra.e the efficiency of the method.

关键词： meshfree method thermo-ela.ticity

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