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Exa.ine the Relia.ility of Econometrics Softw.0}e: a. Emp.rica. Comp.rison of Time Series Modelling

Op.n Journa. of Sta.istics 2023年第1期13卷 25-45页

作者： w.ckra.a.ingha.e M. a. w.ckra.a.inghe parana p. a. w. athukorala Siththa.a.G. J. Sena.a.hne Ya.1} p. R. D. Ya.1} Dep.rtment of Sta.istics & Comp.ter Science Faculty of Science University of Peradeniya Peradeniya Sri Lanka Dep.rtment of Economics & Sta.istics Faculty of Arts University of Peradeniya Peradeniya Sri Lanka

Resea.chers must understa.d tha. na.vely relying on the relia.ility of sta.istica. softw.0}e p.cka.es ma. result in subop.ima., bia.ed, or erroneous results, w.ich a.fects a.0}lied economic theory a.d the conclusions a.d p.licy recommenda.ions dra.n from it. To crea.e confidence in a.result, severa. softw.0}e p.cka.es should be a.0}lied to the sa.e estima.ion p.oblem. This study exa.ines the results of three softw.0}e p.cka.es (EView., R, a.d Sta.a. in the a.a.ysis of time-series econometric da.a. The time-series da.a.a.a.ysis w.ich p.esents the determina.ts of ma.roeconomic grow.h of Sri La.ka.from 1978 to 2020 ha. been used. The study focuses on testing for sta.iona.ity, cointegra.ion, a.d significa.t rela.ionship. a.ong the va.ia.les. The a.gmented Dickey-Fuller a.d p.illip. p.rron tests w.re emp.oyed in this study to test for sta.iona.ity, w.ile the Joha.sen cointegra.ion test w.0} utilized to test for cointegra.ion. The study emp.oys the vector error correction model to a.sess the short-run a.d long-term dyna.ics of the va.ia.les in a. a.temp. to determine the rela.ionship.betw.en them. Fina.ly, the Gra.ger Ca.sa.ity test is emp.oyed in order to exa.ine the linea. ca.sa.ion betw.en the concerned va.ia.les. The study revea.ed tha. the results p.oduced by three softw.0}e p.cka.es for the sa.e da.a.et a.d the sa.e la. order va.y significa.tly. This imp.ies tha. time series econometrics results a.e sensitive to the softw.0}e tha. is used by the resea.chers w.ile p.oviding different p.licy imp.ica.ions even for the sa.e da.a.et. The p.esent study highlights the necessity of further a.a.ysis to investiga.e the imp.ct of softw.0}e p.cka.es in time series a.a.ysis of economic scena.ios.

关键词： Econometrics Ma.roeconomic Determina.ts Softw.0}e p.cka.es Time Series Modelling

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DC p.a.ma.Technology a.0}lied to p.w.er Meta.lurgy: a. Overview

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p.a.ma.Science a.d Technology 2013年第1期15卷 70-81页

作者： a. N. KLEIN R. p. Ca.DOSO H. C. p.Va.a.I C. BINDER a. M. Ma.ISKa.G. Ha.MES D. FUSa. a. SEEBER S. F. BRUNa.TO J. L. R. MUZa.T La.Ma. (Ma.eria.s La.ora.ory) Departamento de Engenharia Mec~nica Universidade Federal de Santa Catarina (UFSC) 88040-900 FlorianSpolis - SC Brazil Dep.rta.ento de Engenha.ia.Meca.ica Universidade Federal do Parana (UFPR) 81531-990 Curitiba- PR Brazil Dep.rta.ento a.a.emico de Meta.-Meca.ica Instituto Federal de Santa Catarina (IFSC) 88020-300 Florianopolis - SC Brazil Universida.e Tecnologica.Federa. do parana (UTFp.) 84016-210 Ponta Grossa - PR Brazil Centro de Ciencia.e Tecnologia Universidade de Caxias do Sul 95070-560 Caxias do Sul- RS Brazil

DC p.a.ma.is a.very p.omising technology for p.ocessing different ma.eria.s, a.d is becoming esp.cia.ly interesting w.en low.environmenta. imp.ct a.d high-p.rforma.ce trea.ments a.e needed. Some of the intrinsic cha.a.teristics of DC p.a.ma.technology, w.ich ma.e it suita.le for p.w.er meta.lurgy （p.） a.d p.w.er injection molding （p.M） p.rts p.oduction, a.e low. p.essure p.ocessing a.d p.a.ma.environment high rea.tivity. Moreover it ca. be considered a. a.highly comp.titive green technology. In this w.rk, a. overview.of some of the imp.rta.t DC p.a.ma.techniques a.0}lied to p. a.d p.M p.rts p.ocessing is p.esented. Emp.a.is is given to the descrip.ions of the ma.n cha.a.teristics a.d the technique p.tentia.s of p.a.ma.a.sisted nitriding, p.a.ma.a.sisted therma. debinding, p.a.ma.a.sisted sintering, a.d simulta.eously p.a.ma.a.sisted sintering a.d surfa.e a.loying. The a.p.cts p.esented a.d discussed in this p.p.r indica.e tha. DC p.a.ma.p.ocesses a.e p.omising a.d comp.titive techniques for p. a.d p.M p.rts p.ocessing.

关键词： p.w.er meta.lurgy DC glow.discha.ge p.a.ma.nitriding p.a.ma.sintering,p.a.ma.a.sisted therma. debinding surfa.e a.loying

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Demodula.ing the Resp.nse of Op.ica. Fibre Long-p.riod Gra.ings： Genetic a.gorithm a.0}roa.h

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Chinese p.ysics Letters 2006年第9期23卷 2480-2482页

作者： p. S. a.dré R. a. Sá. Ferreira.C. M. L. Correia.H. Ka.inow.hy 忻向军 J.L.p.nto Instituto de Telecomunica.es Universidade de A veiro Campus de Santiago 3810-193 A veiro Portugal Dep.rta.ento de Fisica Universidade de A veiro Campus de Santiago 3810-193 A veiro Portugal Centro de Investiga.a. em Ma.eria.s Comp.sitos e Cergmicos CICECO Universidade de A veiro Campus de Santiago 3810-193 A veiro Portugal Centro Federa. de Educa. Tecnologica.do parana a.v. Sere de Setembro 3165 80230-901 Curitiba-PR Brasil School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876

The extra.tion of the p.ysica. p.ra.eters of long p.riod gra.ings from the sp.ctra. resp.nse is not a. ea.y p.ocess. w. p.esent a.demodula.ion technique to synthesize the p.ysica. p.ra.eters of a.long p.riod gra.ing recorded in a. op.ica. fibre. The demodula.ion is a.hieved through the imp.ementa.ion of a.genetic a.gorithm. The extra.ted p.ra.eters a.e in a.reement w.th the typ.ca. va.ues know. for long p.riod gra.ings.

关键词： SENSORS INDEX

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Sca.a. resona.t frequencies a.d Ha.king effect of a. f(R) globa. monop.le

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Chinese p.ysics C 2017年第9期41卷 138-145页

作者： H. S. Vieira.J. p. Mora.s Gra.a.V. B. Bezerra Institute of Cosmology Department of Physics and Astronomy Tufts University Medford Massachusetts 02155 USA Dep.rta.ento de Fisica Universidade Federal da Parafba Caixa Postal 5008 CEP 58051-970 Joao Pessoa PB Brazil Instituto de Fisica Universidade Federal do Parana Curitiba PR Brazil

Ma.sive sca.a. fields a.e considered in w.th a.globa. monop.le in f（R） gra.ity. The exa.t ba.kground is obta.ned a.d is given in terms of the Heun functions to study the Ha.king ra.ia.ion a.d the gra.ita.iona. field p.oduced by a.Schw.0}zschild bla.k hole solution of the ra.ia. p.rt of the Klein-Gordon equa.ion in this genera. Heun functions. w. a.0}ly the p.op.rties of the genera. the resona.t frequencies of sca.a. p.rticles.

关键词： ma.sive sca.a. field genera. Heun function bla.k hole ra.ia.ion energy level

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Relia.le Content Distribution in p.p.Netw.rks Ba.ed on p.er Group.

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Interna.iona. Journa. of Internet a.d Distributed Systems 2014年第2期2卷 5-14页

作者： Elia. p. Dua.te Jr. a.a.Fla.ia.B. Godoi Dep.rtment of Informa.ics Federal University of Parana (UFPR) Curitiba Brazil

p.er-to-p.er (p.p. netw.rks a.e highly dyna.ic systems w.ich a.e very p.p.la. for content distribution in the Internet. a.single p.er rema.ns in the system for a. unp.edicta.le a.ount of time, a.d the ra.e in w.ich p.ers enter a.d lea.e the system, i.e. the churn, is often high. a.user tha. is obta.ning content from a.selected p.er is frequently informed tha. p.rticula. p.er is not a.a.la.le a.ymore, a.d is a.ked to select a.other p.er, or w.ll ha.e a.other p.er a.signed, often w.thout enough checks to confirm tha. the content p.ovided by the new.p.er p.esents the sa.e qua.ity of the p.evious p.er. In this w.rk w. p.esent a.stra.egy ba.ed on group.communica.ion for tra.sp.rent a.d robust content a.cess in p.p.netw.rks. Instea. of a.cessing a.single p.er for obta.ning the desired content, a.user request is received a.d p.ocessed by a.group.of p.ers. This group.of p.ers, ca.led p.G (p.er Content Group. p.ovides relia.le content a.cess in sense tha. even a. members of the group.cra.h or lea.e the system, users continue to receive the content if a. lea.t one group.member rema.ns fa.lt-free. Ea.h p.G member is ca.0}ble of indep.ndently serving the request. a.p.G is tra.sp.rent to the user, a. the group.interfa.e is identica. to the interfa.e p.ovided by a.single p.er. a.group.member is elected to serve ea.h request. a.fa.lt monitoring comp.nent a.low. the detection of member cra.hes. If the p.er is serving request cra.hes, a.other group.member is elected to continue p.oviding the service. The p.G a.d a.p.p.file sha.ing a.0}lica.ions w.re imp.emented in the JXTa.p.a.form. Eva.ua.ion results a.e p.esented show.ng the la.ency of group.op.ra.ions a.d system comp.nents.

关键词： Content Distribution p.er-to-p.er Netw.rks Group Communica.ion

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Cloud of strings in f(R) gra.ity

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Chinese p.ysics C 2018年第6期42卷 44-52页

作者： J.p.Mora.s Gra.a.Ia.ley p.Lobo Ines G.Sa.a.o Dep.rta.ento de Fisica Universidade Federal do ParanaCuritibaPRBrazil Dep.rta.ento de Fisica Universidade Federal da ParafbaCaixa Postal 5008CEP 58051-970Joao PessoaPBBrazil Institut de Ma.hema.iques et de Sciences p.ysiques(IMSp.01 Bp.613 p.rto-Novo Benin

w. derive the solution for a.sp.erica.ly symmetric string cloud configura.ion in a.＆dimensiona. sp.cetime in the fra.ew.rk of f（R） theories of gra.ity. w. a.so a.a.yze some thermodyna.ic p.op.rties of the joint bla.k hole - cloud of strings solution. For its Ha.king temp.ra.ure, w. found tha. the dep.ndence of the ma.s w.th the horizon is significa.tly different in both theories. For the intera.tion of a.bla.k hole w.th therma. ra.ia.ion, w. found tha. the sha.0}s of the curves a.e simila., but shifted. Our a.a.ysis genera.izes some know. results in the litera.ure.

关键词： modified theories of gra.ity bla.k hole thermodyna.ics gra.ita.iona. a.p.cts of string theory

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Effect of Element Distortion on the Numerica. Disp.rsion of Sp.ctra. Element Methods

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Communica.ions in Comp.ta.iona. p.ysics 2011年第4期9卷 937-958页

作者： S.p.Oliveira.G.Seria.i Dep.rta.ento de Ma.ema.ica Universidade Federal do ParanaCuritiba-PR81531-980Brazil Istituto Na.iona.e di Ocea.ogra.ia.e di Geofisica.Sp.rimenta.e Borgo Grotta Gigante42/cSgonico(TS)34010Italy

Sp.ctra. element methods a.e w.ll esta.lished in the field of w.1}e p.op.ga.ion,in p.rticula. beca.se they inherit the flexibility of finite element methods a.d ha.e low.numerica. disp.rsion *** la.ter is exp.rimenta.ly a.know.edged,but ha. been theoretica.ly show. only in limited ca.es,such a. Ca.tesia. *** is w.ll know. tha. a.finite element mesh ca. conta.n distorted elements tha. genera.e numerica. errors for very la.ge *** the p.esent w.rk,w. study the effect of element distortion on the numerica. disp.rsion error a.d determine the distortion ra.ge in w.ich a. a.cura.e solution is obta.ned for a.given error *** a.so discuss a.double-grid ca.cula.ion of the sp.ctra. element ma.rices tha. p.eserves a.cura.y in deformed geometries.

关键词： Sp.ctra. element method disp.rsion a.a.ysis slivering

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Ba.tericida. a.tivity of hydrogel bea.s ba.ed on N,N,N-trimethyl chitosa./a.gina.e comp.exes loa.ed w.th silver na.op.rticles

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Chinese Chemica. Letters 2015年第9期26卷 1129-1132页

作者： a.essa.dro F.Ma.tins Johny p.Monteiro Elton G.Bona. a.ria.a.p.Gerola.Cleiser T.p.Silva.Emerson M.Girotto a.ley F.Rubira.Edva.i C.Muniz Dep.rta.ento de Quimica Universidade Tecnologica Federal do Parana(UTFPR) Grup. de Ma.eria.s p.limericos e Comp.sitos Universidade Estadual de Maringa(UEM)

p.lysa.cha.ide-ba.ed comp.site ma.eria.s（bea.s） conta.ning silver na.op.rticles（a.Np.） w.re successfully *** bea.s a.ted a. a. efficient vehicle for a.＊ *** p.omoted the a.Np. p.otection a.d inhibited their *** a.sa.s show.d tha. the bea.s/a.Np. concentra.ion ca. be modula.ed to deliver a. a.ount of a.＊ necessa.y for kill Escherichia.coli cells.

关键词： N N N-Trimethyl chitosa. a.gina.e Silver na.op.rticles a.timicrobia. a.tivity Delivery

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Vita.in D deficiency,functiona. sta.us,a.d ba.a.ce in older a.ults w.th osteoa.thritis

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w.rld Journa. of Clinica. Ca.es 2021年第31期9卷 9491-9499页

作者： Cláudia.N Montemor Ma.cos Ta.eu p.Ferna.des a.drey S Ma.quez Regina.Célia.p.li-Frederico Rubens a.exa.dre da.Silva.Ka.en B p.Ferna.des La.ora.ory of Reha.ilita.ion Resea.ch Doctoral Program of Rehabilitation SciencesUniversity Pitágoras Unopar(UNOPAR)Londrina 86041-140ParanaBrazil Dep.rtment of a.esthesiology Irmandade da Santa Casa de LondrinaLondrina 86010-160ParanaBrazil Hea.th Sciences Resea.ch Center University Pitágoras Unopar(UNOPAR)Londrina 86041-140ParanaBrazil Doctora. p.ogra. of Reha.ilita.ion Sciences University Pitagoras Unopar(UNOPAR)Londrina 86041-140ParanaBrazil Dép.rtement des Sciences de la.Sa.té Centre intersectoriel en santédurableLaboratoire de recherche BioNRUniversitédu QuébecàChicoutimi(UQAC)SaguenayG7H 2B1QuébecCanada Centre intégréde sa.téet services socia.x du Sa.uena.-La.-Sa.nt-Jea.(CIUSSS SLSJ) Hôpital de La Baie-Services gériatriques spécialisésSaguenayQuébecG7H 7K9Canada

Ba.KGROUND Low.vita.in D levels a.e a.socia.ed w.th a.more severe ca.e of knee osteoa.thritis(Oa..How.ver,there a.e few.p.blished rep.rts concerning a. a.socia.ion betw.en vita.in D deficiency a.d functiona. sta.us of individua.s w.th Oa.a.d no rep.rts a.out p.stura. ba.a.ce in this *** To a.a.yze the rela.ionship.betw.en vita.in D deficiency a.d severity,functiona. sta.us,a.d ba.a.ce in elderly p.tients w.th *** In this cross-sectiona. study,105 elderly p.tients w.th hip.a.d knee Oa.w.re *** severity w.0} a.sessed by the Kellgren-La.rence *** functiona. sta.us w.0} a.sessed w.th the Lequesne *** ba.a.ce w.0} a.sessed using a.force p.a.form,a.d center-of-p.essure p.ra.eters(velocity a. a.terop.sterior a.d mediola.era. a.is)w.re used a. the ba.a.ce *** 25(OH)vita.in D levels w.re mea.ured using a.chemiluminescence *** Most of the p.tients(mea. a.e:70.6±6.5 yea.s)w.re fema.e(n=78,74.3%).In the group.w.th vita.in D deficiency,43 p.tients(56.6%)ha. severe Oa.w.ile 33 p.tients(43.4%)ha. mild or modera.e Oa.χ^(2) test,p.0.04).p.tients w.th vita.in D deficiency show.d a.higher Lequesne index score(Ma.n-w.itney test,p.0.04),indica.ing a.w.rse functiona. imp.irment w.en comp.red to individua.s w.th norma. vita.in D ***,p.tients w.th vita.in D deficiency ha. w.rse p.stura. ba.a.ce a.cording to the Ma.n-w.itney test(p.0.03).CONCLUSION Vita.in D deficiency is a.socia.ed w.th w.rse severity,functiona. sta.us,a.d p.stura. ba.a.ce in p.tients w.th Oa.

关键词： Osteoa.thritis Elderly Vita.in D Disa.ility Severity Ba.a.ce

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Use of ultra.ound to modify the p.rolyzed bioma.s of p.nus *** the imp.ica.ions for biologica. models

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Informa.ion p.ocessing in a.riculture 2018年第2期5卷 199-204页

作者： a.sla. R.Guima.a.s Ma.celo E.Cordeiro Ja.ueline Nicolini Keller p.Nicolini Chemistry Dep.rtment Federal Institute of ParanaCampus PalmasPR CEP 85555-000Brazil

p.ne(p.nus ssp.)needle bioma.s(p.B)w.3} p.rolyzed a. 400℃ for 3 h a.d then subjected to hydrotherma. trea.ment a. the sa.e temp.ra.ure for 10 min,w.th a.d w.thout the a.dition of p.ta.sium chloride(KCl).The susp.nsions of the ma.eria.s trea.ed hydrotherma.ly w.re submitted to ultra.ound for 5,10,20,30 a.d 60 *** reflecta.ce UV-Vis(DRUV)sp.ctroscop. results for the ma.eria.s w.th va.ia.ions in sonica.ion times w.re obta.ned a.d the ba.d ga.0}energy(E)w.3} ca.cula.ed.a.culture medium conta.ning Sa.cha.omyces cerevisia. w.3} monitored during 30 min of exp.sure to different ma.eria.s for the ca.cula.ion of the 10%(IC10),30%(IC30)a.d 50%(IC50)inhibitory *** the sa.p.es tha. underw.nt ultra.onic trea.ment,the ma.eria. p.rolyzed a. 400℃ w.thout the a.dition of p.ta.sium ions(p.B4003H60)p.esented the grea.est inhibition of 10% of the Sa.cha.omyces cerevisia. *** the ma.eria.s w.thout the a.dition of p.ta.sium,the ma.eria. p.rolyzed a.d sonica.ed for 10 min(p.B4003H10)show.d the best cha.a.teristics for use a. a.sup.ort for Sa.cha.omyces cerevisia. orga.isms.

关键词： p.ta.sium Sa.cha.omyces cerevisia. Sp.ctroscop.

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