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国际会议发言

篇一：国际学术会议发言稿

1.Prologue

Thankyou,Mr.Chairman,foryourgraciousintroduction.Iamhonored tohavethechancetoaddressyouonthisspecialoccasion.Thetopicof mypaperis“TransactionCostandFarmers’ChoiceofAgriculturalProductsSelling”.Theoutlineofmytalkasf ollows.ThefirstpartIwanttointroducethebackgroundofthisresea rch.Thesecondpartsuggestsasimplehouseholdchoicemodel.Thethi rdpartcoversthedatausedinthisresearch.Andthen,weintroduceth eempiricalresults.Finally,asimpleconclusionisgiven.

2.Introduction

Well,let’

smoveonthefirstpartofthistopic.Themotivationofthisworkliket his.Institutionaleconomicspositsthatagentsmakingdecisionson differenttypesoftransactionsdosoinacostlyway.Forexample,far mersdecidingsellaparticularcroptowhombasetheirdecisionsnoto nlyonthepricetheyexpecttoreceiveineachmarketchoicebutalsoon additionalcostsrelatedtotransactinginthesemarkets.

Iwanttouseapicturetoillustrateit.Forexample,givensomemarket channels,farmers’choicescanberegardedasequilibriumbetweenthesurplusandtheadd itionalcoststhatrelatedtotransacting.Especiallyindeveloping countries,high-valuecropproducersfullyparticipateinthemarke tandthetransactioncosthasbeenthehardconstrainttofarmers.Fur thermore,Farmers’marketchoicescanbetakenasachoicedilemmaoftransactioncostand

productionsurplus.Consequently,thescientificquestionofthisr esearchishowtransactioncostaffectsplanters’choices.

3.Methodology

Let’

smovetothetheoreticalmodelofourresearch.Considerahouseholdm odelinonerotation.Instage1,famerηneedstoallocatetheinputfactors.Thisprocesscanqbesetintoafun ctionlikethisQ??QCηmeanshowfunctionstodescribethisquestion.Thefirstequation,c? ?p,z?

muchagriculturalproductsusedbyfamersthemselves.pimpliesthep ricethecagriculturalproduct,z?suggeststhefluctuationofC η.Thesecondequationq??Q??c?,qηmeanstheamountofagriculturalproductstransactedin

q?n?market.Thethirdequationi?q?impliestheamountexchangedinn thtime.

InStage3,farmerswilldecidetoselltheproductstowhom.Chanelj’smarketpriceis

bdecidedbyanexogenesispriceandfarmers’negotiatingpower.pij?p*

j?Bshowsfivetranscripts,atranscriptmeansalistofcourse.Uisou rtargetstudentwhoneedrecommendations.Figureb)illustrateshow CFwork.Assumesimilarusersshareatleasttwocommoncoursesandhav esimilarrating,thenu3andu4aresimilartou,andtheircommoncours ehwillbearecommendationtou.Figurec)presentshowprecedencemin ingwork.Forthisexample,weconsiderpatternswhereonecoursefoll

owsanother.Supposepatternsoccouratleasttwotranscripsarereco gnizedassignificant,thentorefertocoursesinD.AtranscriptTisa sequenceofcourses,e.g.,a->b->c->d.ThenthedefinitionofTop-kR ecommendationProblemisasfollows.GivenasettranscriptsoverDfo rnusers,theextratranscriptTofatargetuser,andadesirednumbero frecommendationsk,ourgoalisto:

1.Assignascorescore:thenumberoftranscriptsthatcontainx. gis10andgandg.

Asweknow,thetargetuserusuallyhastakenalistofcoursesratherth anacourse,soweneedto

﹁

extentourprobabilitycalculationformulars.Forexample,suppose

T={a,b},Pr[xT]the

probabilityxoccurswithouteitheranaorbprecedingit;Pr[x﹁

T]theprobabilityxoccurswithouteitheranaorbfollowingit.Thisp robabilitycanbecalculatedexactly.Sohowtocalculateit?

Session3:RecommendationAlgorithms

Let’

sreviewsession2.Themaingoaloftherecommendationalgorithmsist ocalculatethescoreusingtheformular5.Thedetailisasfollows:as tudentwithatranscripToftakencourses,forthecoursey∈

T,ifyandxappeartogetherintranscriptssatisfiesthe ﹁thresholdθ,thencomputethePr[x﹁

y|yx],reflectingthelikelihoodthestudentwilltakecoursex ﹁

andignoringtheeffectoftheothercoursesinT;finallythemaximumo fPr[x﹁y|yx]ischoosenas

thescore(x).

Hereisthecalculationformularofscore(x)ofSignleMC.Forexample ,withthehigerscore,dwillberecommended.

AnothernewrecommendationalgorithmnamedJointProbabilitiesalg orithm,JointPforshort,isproposed.UnlikeSingleMC,JointPtakes https://www.sodocs.net/doc/915966135.html,rmular1 2,wecannotcomputeitsquantityexactly,Rememberthisproblemweha vementioned.Oursolutionistouseapproximations.Thisslideisabo utthefirstapproximatingformular.Andthisthesecondapproximati ngformular.

ThesystemiscourseRand,anddatasetforexperimentcontains7,500t ranscripts.

Thisslideshowsthenewrecommendationalgoritmswithblackcoloran

dthetraditionaloneswithbluecolor.

Thechartonthisslideindicatesournewrecommendationalgorithmsb eatthetraditionalonesinprecision,becausetheformeronesexploi tpatternsacrossallusers,whilethelatteronesjustusethesimilar users.

Thechartonthisslidepointsoutournewrecommendationalgorithmsa lsobeatthetraditionalonesincoverageforthesamereason.

Session5:ConclusionandSummary

Inconclusion,weproposedanovelprecedenceminingmodel,develope daprobabilisticframeworkformakingrecommendationsandimplemen tedasuiteofrecommendationalgorithmsthatusetheprecedenceinfo rmation.Experimentalresultshowsthatournewalgorithmsperformb

etterthanthetraditionalones,andourrecommendationsystemcanbe easilygeneralizedtootherscenarios,suchaspurchasesofbooks,DV Dsandelectronicequitment.

Tosumup,first,Iintroducedthemotivationandtheoutlineofwork;s econd,Igavethedefinitionofprecedenceminingmodel;third,Idesc ribedsomenewrecommendationalgorithmsusingprecedenceinformat ion;forth,Ishowedourexperimentalresultstocomparethenewalgor ithmswithtraditionalones.Finally,Imadeaconclusionofourwork.. That’sall.Thankyou!Arethereanyquestions?

英语模拟国际会议讲稿

英语模拟国际会议讲稿 Company Document number：WUUT-WUUY-WBBGB-BWYTT-1982GT

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学术会议主席发言稿

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英文学术会议开场的演讲稿

英文学术会议开场的演讲稿 Prepared on 22 November 2020

Good morning, ladies and gentleman. Welcome to Xian, a beautiful city of China. I’m Xinpei Zhang. It is a great pleasure to participate in the Mathematics Conference as the chairman. And I really enjoy staying here with you this morning. The Mathematics Conference has been held 4th times by Shaanxi Normal University since 2008. The purpose of the conference is to share our experiences and knowledge in regard to the theory, frontier developments and researches, as well as possible applications of them in solving practical problems. A lot of current issues have been d i s c u s s e d,a n d s o m e o f t h e m h a v e b e e n e f f e c t i v e l y s o l v e d. Today, as the first time of the conference debut in this city, we’ll have a unique session. The topic of prepared presentations is Mathematics. Today, speakers will share their thoughts on how to effectively run models in different issues and give a reasonable ,we’ll have a Q&A session,w hich allows the everyone to ask some questions you may be interested. I am sure that you will find some topics to be presented both interesting and informative. Now,Let me introduce the first speaker,who is very very rich,not in dollars,but in knowledges and experiences,He got his in financial economics at the UCB,followed by a series of teaching and research positions at MIT and Harvard. Please dont hesitate to join me in welcoming our first speaker, , whose topic is entitled threshold effect between the scale of shadow banking and the stability of the banking system. Welcome.

国际会议作报告英语发言稿

国际会议作报告英语发言稿精选文档 TTMS system office room 【TTMS16H-TTMS2A-TTMS8Q8-

Thank you,prof. …. My nameis ….. I’m from …..I amvery pleased to be here to join this forum.The topicof my presentation is properties of rapid construction materials for soil pavement of field airfield. As is shown in the picture, the main parts of my research are about soil pavement. My presentation will include these four parts: First, some background information about this research; second, the main work we have done; third, some conclusions we have got and the last: innovation and presentation of our published papers. Why I choose this item I think it can be illustrated from the following four parts. First, the existing quantity of airfields is still not sufficient and the airfields have many shortcomings especially in war time. Second, the complementary facilities, such as highway runways are far less than airfields, however, have more weakness. Third, a certain amount of field airfield is quite necessary considering some emergencies such as rescue and disaster relief. Forth, the field airfield can fill the void of airfield and they can be combined to be airfield network. The meaning and aim of this research contains three parts. Fast, convenient and validity, fast means the field airfield must be constructed as fast as possible, convenient means the construction should need the

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国际会议发言

最新学术会议领导讲话稿

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