2019国际学术会议发言

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1、国际学术会议发言　　第一篇：硒—国际学术会议　　以单一元素作为议题而举行的国际研讨会，硒是最早的，也是唯一的一个，每五年举办一次，至今已召开八届。其中，第三届和第六届都在中国北京举办；20XX年，第八届“硒在生物医药中的应用”国际会议在美国威斯康星大学隆重召开，纳米硒是本届硒全球大会来自中国的唯一参展商。由此可见硒对人体健康的重要性。　　硒在人体中的作用是广谱的。迄今为止，已知人类有490余种疾病与缺硒有直接关系。人们把硒称为“明星营养素”、“抗癌之王”等等，国际上发表的硒的生物医学研究科学论文已经超过一万篇，是其他微量元素所不能比拟的。　　第二篇：稿　　

2、1.prologue　　thankyou,mr.chairman,foryourgraciousintroduction.iamhonoredtohavethechancetoaddressyouonthisspecialoccasion.thetopicofmypaperis“transactioncostandfarmers’choiceofagriculturalproductsselling”.theoutlineofmytalkasfollows.thefirstpartiwanttointroducethebackgroundofthisres

3、earch.thesecondpartsuggestsasimplehouseholdchoicemodel.thethirdpartcoversthedatausedinthisresearch.andthen,weintroducetheempiricalresults.finally,asimpleconclusionisgiven.　　2.introduction　　well,let’smoveonthefirstpartofthistopic.themotivationofthisworklikethis.institutionaleconomi

4、cspositsthatagentsmakingdecisionsondifferenttypesoftransactionsdosoinacostlyway.forexample,farmersdecidingsellaparticularcroptowhombasetheirdecisionsnotonlyonthepricetheyexpecttoreceiveineachmarketchoicebutalsoonadditionalcostsrelatedtotransactinginthesemarkets.　　iwanttouseapictur

5、etoillustrateit.forexample,givensomemarketchannels,farmers’choicescanberegardedasequilibriumbetweenthesurplusandtheadditionalcoststhatrelatedtotransacting.especiallyindevelopingcountries,high-valuecropproducersfullyparticipateinthemarketandthetransactioncosthasbeenthehardconstrain

6、ttofarmers.furthermore,farmers’marketchoicescanbetakenasachoicedilemmaoftransactioncostandproductionsurplus.consequently,thescientificquestionofthisresearchishowtransactioncostaffectsplanters’choices.　　3.methodology　　let’smovetothetheoreticalmodelofourresearch.considerahouseholdmo

7、delinonerotation.instage1,famerηneedstoallocatetheinputfactors.thisprocesscanqbesetintoafunctionlikethisq??q,qηmeanstheoutputfarmersdecideqtoproduce.pimpliestheoutputpricewimpliesinputpriceand.z:?isfixedinput.onceproducewhatandproducehowmanyaredecided,nextquestiontobeconsideredish

8、owmuchproductstobetransactedinmar