國(guó)際學(xué)術(shù)會(huì)議發(fā)言

1、國(guó)際學(xué)術(shù)會(huì)議發(fā)言 1. Prologue Thank you, Mr. Chairman, for your gracious introduction. I am honored to have the chance to address you on this special oasion. The topic of my pa-pe-r is “Transaction Cost and Farmers Choice of Agricultural Products Selling”. The outline of my talk as follows. The first part I

2、want to introduce the background of this research. The second part suggests a si-mp-le household choice model .The third part covers the data used in this research. And then, we introduce the empirical results. Finally, a si-mp-le conclusion is given. 2. Introduction Well, lets move on the first par

3、t of this topic .The motivation of this work like this. Institutional economics posits that agents ma-ki-ng 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 rece

4、ive 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 transacting .

5、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 scientifi

6、c question of this research is how transaction cost affects planters choices. 3. Methodology Lets 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 Q

7、( p , w , z ) , 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 ()C means how

8、functions 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 in qnmarket. The t

9、hird equation i q implies the amount exchanged in nth time. In Stage 3, farmers will decide to sell the products to whom. Chanel js market price is bdecided by an exogenesis price and farmers negotiating power. pijp* jB(qi,zi)Besides this, we use a matrix to show the profit of Chanel j X ik ik , ik

10、and then farmers choice can be expressed in a typical choice model exp(Xij)Pr(jij|Xik)1 exp(Xij) k1 Based on the choice model, another important concept is famers channel choice .Here, we set five types .They rank by the market barriers. Aordingly, we set a group discrete number to express them. Y:

11、dependent variable Y=5,means farmer choose brokers. Y=1, farmers sell products to consumers directly. 4. Data and estimation procedures Here, we illustrate the data distribution with this map. Aording to the Agricultural regionalization from Department of Agriculture, The apple specialization areas

12、in China contain 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

13、 in 7 provinces. Then use random sample method to get village and household. They are our sample distribution. 5. Empirical Results 6. Conclusions 國(guó)際會(huì)議作報(bào)告英語(yǔ)發(fā)言稿xx-12-19 23:35 | #2樓 Thank you, prof. . My name is . Im from . I am very pleased to be here to join this forum. The topic of my presentation

14、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 d

15、one; third, some conclusions we have got and the last: innovation and presentation of our published pa-pe-rs. 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 shortings e

16、specially in war time. Second, the plementary 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

17、 the void of airfield and they can be bined to be airfield work. 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 minimum equipment, labor

18、 and materials considering the actual construction condition, validity means the constructed airfield is able to support the operation of given aircraft in specifically time. Just like many other territories, the situation of the research is that the U.S. Army takes advanced line. The U.S. Army decl

19、ares that they can reach to anywhere on the earth in 96 hours, the most important method for force projection is though aircraft, thus rapid construction of pavement is the key problem for rapid force transportation. The main work we have done can be summarized as four parts, materials choosing, sch

20、eme ma-ki-ng, mechanical properties research and water-stable properties research. We choose two kinds of soils, which are got from Xian, Shanxi province and Jiuquan, Gansu province separately. The sand from Ba River was considerate to investigate the influence of sand to the properties of stabilize

21、d soil. The chosen three kinds of powders are cement, lime and new-type stabilizer developed by Changan University. The principles in considering the function of 4 kings of fibers are referring different length, type and mixing them. On aount of the time, I will make a brief description about the ex

22、periment scheme. In summary, three parts were proposed to distinguish the affecting factors in ma-ki-ng experiment scheme. They are powder control, fiber control and other factors. Taking powder control for example, the dosage of cement is respectively 6%, 8% and 10% when the soil is stabilized only

23、 by cement, while the dosage of cement decrease to 3%, 5% and 7% when the lime is addicted to stabilized soil. The following two factors are stabilizer and sand. Six kinds of experiments were performed to investigate the influence of above factors to the mechanical properties of stabilized soil. The

24、 aim of paction test is to find the maximum dry density and optimum moisture content. The aim of pression strength test is to determine the optimum dosage of cement, lime, powder stabilizer and fiber, meanwhile evaluating the performance of stabilized soil. The aim of splitting tension strength test

25、 is similar to pression strength test, the left picture is sample stabilized by cement, while the right picture is the sample stabilized by fiber and cement. The direct sheer is another important parameter in geotechnical engineering. It influences the foundation bearing capacity and many other prop

26、erties especially for soil base and base course. The left picture shows the course of ma-ki-ng sample and the right picture shows the test process. The CBR test and rebound modulus test are referenced from highway test specification to evaluating the prehensive capacities of each structure level of

27、the pavement. For both the two tests, the left picture shows the course of ma-ki-ng sample and the right picture shows the test process. What should be noted is that the number of sample is at least 6, the last result is the average value of these date got from test after eliminating the bad results

28、. Four kinds of experiments were performed to investigate the influence of above factors to the water-stable properties of stabilized soil. The scouring test is not the stated experiment in current specification. It is performed by us through looking up large quantity of interrelated literature, and

29、 two different ways to carry out. The left picture shows the method of vibration table and the right picture shows the method of fatigue test instrument. Perant test refers to the experiment in relating concrete specification. The left picture shows the process of saturation, the right picture shows

30、 the test process. Cantabria test and other tests are all original experiments; they are used in stabilized soil for first time, here I will not develop my narrative. As regards the innovation, I think it throughout the whole research, including materials choosing, scheme ma-ki-ng, mechanical and wa

31、ter-stable experiments. I think it can be drawled from the following keywords, such as soil choosing, sand, powders, fibers, and so on. Three main parts can be summarized. First, se-le-cting two kinds of soils, three kinds of powders, several binations; second, several kinds of fibers, different len

32、gth and admixture; third, prehensive experiments, test method and test instrument. 英文國(guó)際學(xué)術(shù)會(huì)議開幕詞演講稿xx-12-19 17:31 | #3樓 Distinguished guests, distinguished delegates, ladies and gentlemen, and all the friends: At this special time of wonderful March, in this grand hall of the beautiful campus, Our res

33、pectable guests are here getting together . Jointly sponsored by China Remote Sensing Association, undertaken by Remote Sensing Institution of NUIST at Nan _g, the first International Conference on Remote Sensing technology , will be open. Now, First of all, please allow me to give our hearty wele t

34、o all of you present, and thank you , for your friendly ing. We feel so proud, and appreciated as well to be the host of the event. It is a great honor for us to have all you here to attend this conference, of which the theme is the academic exchange about the advanced technologies on RS. Here Id be

35、 delighted to introduce our conventioneers in brief. Apart from our faculty and students, Most of the delegates and guests are prestigious experts and scientists, who are related in these fields from all over the world. With many significant achievements, they are the most dynamic leaders in the mov

36、ements of the science and technology. As the host, I would like to take this opportunity to give you a general introduction about our school. Nan _g University of Information Science & Technology (NUIST), founded in 1960 and renamed from Nan _g Institute of Meteorology in xx, was designated in 1978 as one of the key ins