原文第一句原文第二段第页第页，学术英语国际会议主持人主席演讲稿模版。
国际会议演讲稿
Freeze–thaw cycle test and damage mechanics models of
alkali-activated slag concrete＇＇＇＇
Thank you for your invitation and warm hospitality.
“Freeze–thaw cycle test and damage mechanics models of alkali-activated slag concrete” I would like to thank Professor Cui ,for inviting me to deliver this “Freeze-thaw cycle test and damage mechanics models of alkali-activated slag concrete”. Theplentiful studies on a new green binding material—alkali-activated concrete .The effect of freeze-thaw cycles on in concrete was studied by experiment.
， I shall explore a possible agenda for analysis to enable understanding of the alkali-activated slag concrete.
“new green binding material—alkali-activated cement”the introduction of Freeze–thaw cycle test and damage mechanics models of alkali-activated slag concrete. Now let's look at the ppt In recent years, there are plentiful studies on a new green binding material—alkali-activated cement, it can be prepared by wastes containing kaolinite (原文introduction第一句) The binding materials with three-dimensional network structure are yield by shrinking and polymerization reaction. With the arriving of low carbon economy time, international governments attach more importance to energy saving, emission reducing and cycled economics.(原文第二段)a genuine low carbon cement.（ppt第3页） –I'd like to talk is the materialswe can see clear that the Slag used in this study was metallurgy blast furnace slag, was supplied by Jiangxi Building Materials Plant, PR China, its specific surface is 410 m2/kg. chemical compositions of slag are listed in .（ppt第4页）
NaOH and Na2SiO3 sodium silicate multiplex solution was used as alkali activator, module of sodium silicate is 3.34. Sand with finenemodulus of 2.78 was used as fine aggregate. Limestone were used as crushed rock aggregate (5–20 mm:20–40 mm = 45:55).(引用原文Materials第二段结论) Mix proportion and specimen preparation , . Mix proportion and specimen preparation.Mix proportion, workability and compressive strength at 28 d of ASC are listed in . It was prepared by a single decubital axis compellent beater with content of 60 L. the samples were demoulded and cured
under scheduled regimes. Thirty samples were tested for freeze–thaw cycle tests. Table 1. Mix proportion, workability and strength of ASC(引用原文第二部分第二小点)（ppt第5页） The Freeze–thaw resistance was tested according to ASTM C666 and GB/T 50082-2016 “Standard for test methods of long-term performance and durability of ordinary concrete”. Six samples of each batch were tested, the average value of 6 samples was served as the finial freeze–thaw resistance. Maand dynamic elasticity modulus were tested once after an interval of 25 times cycles, maximal cycle times (when relative dynamic elasticity modulus was 60% and percentage of malowas 5% at lowest) can denote freeze–thaw resistance of ASC. TDR-16V computer controlled concrete fast freeze–thaw cycle testing machine and DT-10W dynamic elasticity modulus testing machine were used to conduct the tests.(原文2.3 /ppt第6页)
–thaw resistance mechanism of ASC 2.Freeze–thaw resistance durability of ASC(ppt 第7页)
Results of fast freeze–thaw cycle tests of ASC are listed in Table 3. As can be seen: (1) With the increase of freeze–thaw cycle times, relative dynamic elasticity modulus of ASC are descending slowly, this shows excellent ductility, relative dynamic elasticity modulus of A1–A5 are all about 90% at 300 times cycle（ppt第8页）(2) It is improper to set maloof ASC as the evaluation index of freeze–thaw destroy, because maloof A1–A5 vary indistinctively in the progreof freeze–thaw, it cannot reflect the destroy degree of concrete exactly, thus it is improper to use it to test and evaluate the freeze–thaw damage of ASC (which is shown in Fig. 1).（ppt第9页）
The first is ASC used industrial waste – slag as raw materials, and it had excellent freeze–thaw resistance with frost-resisting grade of F300 at lowest, relative dynamic elasticity modulus were about 90% after 300 times freeze–thaw cycles, it also had little maloss, surface freeze–thaw damage layers were very thin, which can effectively restrain freeze–thaw damage of concrete from worsening.(ppt第10页)The second is Different from freeze–thaw cycle damage models of PC, dynamic elasticity modulus attenuation models were superior to accumulative freeze–thaw damage models, and power function models were superior to exponential function models with better precision and relativity. （ppt第10页）
Thank you very much for the privilege of presenting this paper
学术英语 国际会议主持人,主席 chairman演讲稿模版
学术英语国际会议主持人/主席chairman演讲稿模版
Distinguished Delegates and Guests, Ladies and Gentleman:
Good morning! (Introduce myself) I am (Name) from (University). As chairperson of this session. I have the pleasure and honor of welcoming all of you. We have an excellent session for you, in terms of both content and the distinction and the stature of our speakers.
--------------------------------------------------------------------------- increasingly important. The lifestyle of us have been changed by it, too. And the first investigator in this field. This morning she is going to talk about the secret of ------------------------------------------------------------------------------From your presentation we know the reason why (AI developed by human being can beat the best chemaster), and we believe that AI will make the most advantage in future. Thank you.
---------------------------------------------------- foremost researchers.
She is a professor in the (xxx Computer Science Department since 2016).She published several influential papers, is very famous in academia. And she is a best-selling author, too. Today she will show the new research achievement she found with us.The research achievements have reference values for energy management and dispatch control of smart grid. ----------------------- delighted to be able share your new specific strategies and techniques. Thank you.I'd like to pay my tribute to the speakers for their excellent presentations and the audience for their attention today.
英文国际学术会议开幕词演讲稿
International Conference on Remote Sensing Technology
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 respectable guests are here getting together . Jointly sponsored by China Remote Sensing Association, undertaken by Remote Sensing Institution of NUIST at Nanjing, the first International Conference on Remote Sensing technology , will be open. Now, First of all, please allow me to give our hearty welcome to all of you present, and thank you , for your friendly coming. 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 I’d be 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 movements of the science and technology.As the host, I would like to take this opportunity to give you a general introduction about our school. Nanjing University of Information Science & Technology (NUIST), founded in 1960 and renamed from Nanjing Institute of Meteorology in 2004, was designated in 1978 as one of the key institutions of higher learning in China. The university consists of 24 departments or colleges, 12 scientific research institutions and one international training center. The university, covering an area of 140 hectares with a floor space of 420000 square meters, boasts 42 basic and special laboratories such as Key Laboratory of Meteorological Disasters and Sino-American Remote Sensing Laboratory. With a total collection of over 1,170,000 books, the library was listed as one of the most completed literature libraries in China in terms of atmospheric sciences.
For this conference, we are following the agenda here. The meeting is supposed to last for three days，and to be separated into two parts. To begin with , we’ll invite some representatives from our guests to give lectures about their latest researches and reports on the issue, and then we will have some symposiums. During the conference we are pleased to be your guide to this city. If anything needed, don’t hesitate to contact us. We believe by our collaboration we are sure to make this gathering a consummation.
And finally I wish you an unforgettable and prefect experience here.
Thanks!
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