国际学术会议发言稿.docx

1、国际学术会议发言稿国际学术会议发言稿第一篇：1. prologuethank you, mr. chairman, for your gracious introduction. i am honored to have the chance to address you on this special occasion. the topic of my paper is “transaction cost and farmers choice of agricultural products selling”. the outline of my talk as follows. the f

2、irst part i want to introduce the background of this research. the second part suggests a simple household choice model .the third part covers the data used in this research. and then, we introduce the empirical results. finally, a simple conclusion is given.2. introductionwell, lets move on the fir

3、st part of this topic .the motivation of this work like this. institutional economics posits that agents making decisions on different types of transactions do so in a costly way .for example , farmers deciding sell a particular crop to whom base their decisions not only on the price they expect to

4、receive in each market choice but also on additional costs related to transacting in these markets.i want to use a picture to illustrate it. for example, given some market channels, farmers choices can be regarded as equilibrium between the surplus and the additional costs that related to transactin

5、g .especially in developing countries, high-value crop producers fully participate in the market and the transaction cost has been the hard constraint to farmers. furthermore, farmers market choices can be taken as a choice dilemma of transaction cost and production surplus. consequently, the scient

6、ific question of this research is how transaction cost affects planters choices.3. methodologylets move to the theoretical model of our research. consider a household model in one rotation. in stage 1 , famer needs to allocate the input factors .this process can qbe set into a function like this q?

7、? q , q means the output farmers decide qto produce .p implies the output price w implies input price and.z: ? is fixed input. once produce what and produce how many are decided, next question to be considered is how much products to be transacted in market. here we use three ccc means how functions

8、 to describe this question. the first equation, c ? ?p , z ?much agricultural products used by famers themselves. p implies the price the cagricultural product,z ?suggests the fluctuation of c. the second equation q ? ? q ? ?c?, q means the amount of agricultural products transacted inq?n?market. th

9、e third equationi ? q ?implies the amount exchanged in nth time.in stage 3, farmers will decide to sell the products to whom. chanel js market price isbdecided by an exogenesis price and farmers negotiating power.pij?p*j?bbesides this, we use a matrix to show the net profit of chanel jx ik? ik, ? ?

10、ik ?and then farmers choice can be expressed in a typical choice modelexppr?1 exp? k?1based on the choice model, another important concept is famers channel choice .here, we set five types .they rank by the market barriers. accordingly, we set a group discrete number to express them. y: dependent va

11、riable y=5,means farmer choosebrokers. y=1, farmers sell products to consumers directly.4. data and estimation procedureshere, we illustrate the data distribution with this map. according to the agricultural regionalization from department of agriculture, the apple specialization areas in china cont

12、ain two parts: bo sea area and loess plateau. bo sea area in red color, contains hebei, shandong and liaoning 3 provinces. and loess plateau in green color, contains shanxi, henan, shaanxi and gansu 4 provinces. firstly, we use pps method to get the first stage sampling unit 14 counties in 7 provinc

13、es. then use random sample method to get village and household. they are our sample distribution.5. empirical results6. conclusions第二篇：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

14、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。第三篇：国际学术会议模拟大赛关于举办首届“国际学术会议模拟大赛”的通知为提升研究生综合素质，开阔研究生国际化视野，提升研究生英语交流和沟通能力，展现研究生群体学术功底，校研究生会将举办“20XX年研究生文化节”之国际学术会议模拟大赛，现将有关事宜通知如下：一、活动时间：11月14日12月10日二、活动内容：本届研究生国际学术会议模拟比赛由学术墙报设计和学术会议发言两项赛事组成。1.学术墙报设计：要求设计者用英文设计一幅学

15、术墙报，规格70cmx100cm，分辨率150像素以上，jpeg格式，内容旨在阐明一项学术观点或分析一个学术问题，亦可为对某个学术会议、学术论文、学术专著或学术研究者之介绍。2.学术会议发言：要求发言者时间控制在5分钟内，使用英语阐释自己的某项学术研究成果，或阐明对某一学术问题的见解。三、评定标准：1.学术墙报设计比赛：按照学术价值、语法语用规范、形式样式的标准进行评定，由研究生院聘请校内外专家对选手提交的设计稿进行评审。2.学术会议发言比赛：按照学术价值、用语规范、语言流畅度、仪容仪表的标准进行评定，超时者酌情扣分，由研究生院聘请校内外专家对选手进行打分。四、报名办法与比赛规程1.报名办法本

16、次比赛，由各研究生分会负责组织并动员本学院研究生参赛，每个学院推荐学术墙报设计参赛作品3-5件，推选学术会议发言比赛选手2-4人。各研究生分会于11月14日25日组织好本单位报名工作，在进行初审后，于11月25日晚22:00之前，将参赛作品及参赛选手的报名表发送至研究生会电子邮箱：yjshsnnu.edu。本次比赛亦欢迎有英语特长及学术研究潜力的本科生踊跃报名，请报名选手将本人参赛作品或参赛选手的报名表于11月25日晚22：00之前，发送至研究生会电子邮箱：yjshsnnu.edu。2.比赛流程学术墙报设计比赛分为初审、复审两个阶段，学术会议发言比赛分为初赛、复赛两个阶段。五、表彰奖励学术墙报

17、设计比赛：设一等奖一名，二等奖两名，三等奖三名，颁发荣誉证书及奖金；设优秀奖若干名，颁发荣誉证书及奖品，对于获得一、二、三等奖及优秀奖的学术墙报设计作品，将面向全校师生进行展示。学术会议发言比赛：设一等奖一名，二等奖三名，三等奖五名，颁发荣誉证书及奖金；设优秀奖若干名，颁发荣誉证书及奖品。本次大赛的荣誉证书及奖品，将在研究生迎新晚会上予以颁发。六、其他：1.学术会议发言比赛，具体比赛时间和地点将通过电子邮件及手机短信的方式通知参赛选手，请参赛选手在11月23日-26日期间保持联系方式的畅通，并关注电子邮箱。2.学术墙报设计比赛的相关作品，须填写“作品原创性声明”，要求参赛作品必须为个人原创成果

18、，严禁任何形式的剽窃抄袭，一经发现，报研究生院及相关单位严肃处理。3.学术会议发言比赛仅限单人报名参加，学术墙报设计比赛作品可为集体创作，但须写明第一创作人。4.本次活动最终解释权归校研究生会所有，未尽事宜另行通知。联系人：张伯阳赵桐羽陕西师范大学研究生会20XX年11月13日第四篇：国际学术会议交流方案study on the prediction model of bus arrival timethe urban public transportation information service system, for the bus arrival time showed on the

19、 intelligent electronic station board，is designed to provide accurate and timely information which can help travelers choose transit lines and the shortest paths, can improve the travel efficiency and attract more potential travelers.however, the current bus arrival time prediction model under appli

20、cation cant achieve satisfactory results. this paper analyzes the technology xxponents of the bus arrival time, and builds real-time dynamic models for each xxponent. finally, it adds up all the technology xxponents of the bus arrival time, gets a much more accurate prediction model.keywordselectron

21、ic station board; bus arrival time; prediction modelintroduction1、nowadays, urban public transportation system has attracted the peoples unprecedented attention and experienced a very good development; meanwhile, theory research，system design and implementation of the advanced public transportation

22、systems, as an important part of the intelligent transportation systems,are being promoted.2、installing the intelligent electronic station board at the bus stop station for showing the distribution of transit lines related to the station, the distance of the bus belong to some transit line and their

23、 prediction arrival time, can help passengers know the location of each bus and determine their travel arrangements.3、the urban public transportation information service system is an important part of apts, also reflects the modernization of urban public transportation; it constitutes a part of the

24、modern urban public transportation system, collaborating with the intelligent transit dispatching system, the transit optimization system and the transit evaluation system.technical analysis of bus arrival time1、the accuracy of the bus arrival prediction time is directly related to the precision of

25、information showed on the intelligent electronic station board. therefore, the accuracy of the next buss arrival prediction time showed on the intelligent electronic station board is a very key indicator.2、the prediction model of bus arrival time displayed on the intelligent electronic station board

26、 need to be improved urgently.meanwhile, theory research，system design and implementation of the advanced public transportation systems, as an important part of the intelligent transportation systems,are being promoted.3、the technology xxponents of the bus arrival time are divided into the following

27、 five parts:? the average travel time through the sections; queuing delay time as a result of the impact of signal control; the time the bus travel through the intersection; stop time at the last few stop stations as a result of the passengers get off and on before the predictionstop station;? lost

28、time of slow down and speed up because of bus entering and leaving the stop at the lastfew stop stations before the prediction stop station.the prediction model of bus arrival timea. the travel time on sectionstravel time is defined as pure running time on sections, does not contain short delayed ti

29、me because of traffic signal control, the time for passengers getting on and off on each stop station and the stop time for vehicle technical problems.b. the delay time on stop stations before the prediction stop stationthe delay time at stop station denotes the lost time when they slow down and spe

30、ed up because of bus entering and leaving the stop station, the time for opening the bus doors and the time occupied by passengers to get on .c. queuing delay time as a result of the impact of signal controld. the time the bus travel through the intersectionit is presumed that the speed of vehicles

31、travel through kth intersection equals to the average vehicle speed of upstream section and downstream section, then the time the bus travel through the kth intersection equals e. calculating the bus arrival timeconclusion? the average travel time through the sections; queuing delay time as a result

32、 of the impact of signal control; the time the bus travel through the intersection; stop time at the last few stop stations as a result of the passengers get off and on before the predictionstop station;? lost time of slow down and speed up because of bus entering and leaving the stop at the lastfew stop st