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关于科技的英语演讲
篇一：科技英语演讲
Good morning,everyone,I am Shen,from class 1208011.I am very honored to stand here and give you a short speech. To begin with,we who major in computer all know that algorithm is pretty important in program.Algorthm is the soul of program. Nikiklaus Wirth said that program is equal to algorithm plus data structure.
Today,My topic is”Typical Sort Problems”.I will make a brief introduction to it.We find seven kinds of typical sort algorithm altogether．They are Bubble sort,Direct ion sort,Straight select sort,Shell sort，Merge sort,Quick sort and Heap sort.In the interest of time，I will only introduce several of them here．
The first:Bubble sort
Step1:make small number ahead and large
number behind by exchanging
the position of two adjacent numbers
step2:
iterate the whole array,
the largest number 'sink' to the back
step3:
Repeat step1 and step2 N times
The number N depends on the length of the array.
Then,the array will be orderly.Bubble sort is very simple.It is the introduction to sort algorithm.
The second: Direct ion sort
step1:
Insert a number waiting to be
sorted into the sequence that
has been already sorted
step2:
Repeat step1 until all the numbers
have been ed completely
What does it means？Let’s take an example.There is an array A[5].First of all,A[0] is only one number,it has been already orderly,so we needn’t to move it.Then we will compare A[1] to A[0]，if A[1]> A[0],do not move it. if A[1]< A[0],exchange the value of A[1] and A[0].Next we will compare A[2] to A[1] and so on.Finally,the array will be orderly.We can see that Direct ion sort is simple too.
The third:Straight select sort
step 1:
Get min{R[0]——R[n-1]},
exchange the value of min and R[0]
It means that we find the smallest number from R[0] to R[n-1] and then exchange the value of min and R[0]
step 2:
Get min{R[1]——R[n-1]},exchange the value of min and R[1] Step2 and step1 have the same operations in addition to replace the starting point R[0] by R[1].And so are the remaining steps.
These are the remaining steps:
step 3:
Get min{R[2]——R[n-1]},
exchange the value of min and R[2]
……
step n-1:
Get min{R[n-2]——R[n-1]},
exchange the value of min and R[n-2]
The fourth:Shell Sort
Shell Sort is a kind of ion sort. It is the improvement aiming at the Direct ion sort algorithm and named for DL.Shell in 1959.
step1:
Divide the whole array into several sub arrays that length of d ,implement direct ion sort on these sub arrays step2:
Reduce the value of d
step3:
Repeat step1 and step2 till d is enough small
step4:
implement direct ion sort on the whole array Then,the array will be orderly.
The fifth:Merge sort
The main idea of Merge sort is Divide and Conquer.This picture is an example of Merge sort
The sixth:Quick sort
Quick sort has three key elements,they are Key number,Recursion and Divide and Conquer.This is a picture for it.
The seventh:Heap sort
Heap sort has four key elements, they are binary tree ,parent ,leftchild and rightchild.We also prepared a sample picture for it.
This is our summary.This picture shows the relationship among the seven types of algorithms.
In the interest of time,we have to stop here.If you are interested in the remaining content,you can contact us after class.Thank you!
篇二：科技发展过快的利与弊 英文演讲
英语演讲
It’s my great honor to stand here and share my presentation about ‘Advantages and disadvantages of rapid development of science and technology’.
When I had the first glance at this topic, I suddenly came to think of the composition in the College English Test Band 4 which I take in last term. In that part of test, we are asked to write a short essay according to a given picture. In the picture, a pair of parents are facing with a computer on the first floor in an apartment. On the screen is a sentence of irony, ‘Dear son, How is your life going on the second floorWe miss you so much. ’Obviously, the picture reflects the common problem in our daily life. Technology has made us and close relatives and friends more distant.
We can’t deny that the great benefits brought about by the progress on science and technology is hided in every corner of the world. Modern communication tools such as mobiles and QQ make it possible to send message in a handy way. The Internet enables a pupil to accomplish a university graduation thesis. Powerful networking information storage makes incalculable social activity in an orderly way. Sophisticated scientific techniques even help human to explore other planets. Anyway,
the finding of the second earth may give human a new
accomadation after the earth is destroyed. That sounds not bad.As we can see, the rapid development of science and technology has brought great changes to our life. However, some of the influence it takes is not so optimistic. Just like the example I reffered at the beginning. Communicating through social networking website is becoming a threaten to people’s real life. Against to it’s original willing, we gradually fade out in the crowd. Despite this, children lack essential
interpersonal skills. Those who indulge in I pad or I phone often isolated and being cut off from the outside world. They tend to be more introverted, self-centered and withdrawn. From another point of view, the technique makes using tools on a large scale become a consequent tendency. You must hear of the industrial revolution which caused two job cuts over the whole world. Nowadays, the bad influence may even worse. The mature assembly line work is controlled by automatic machine.
Thereupon, a large amount of workers get unemployed. It is not benefit to stabilize society. Some of scientific inventions have also done great harms or disasters to mankind. And advanced technology can be easily manipulated by irresponsible persons or countriees.
It is just easy to think of something, but difficult to give down-to-earth execution. We should avoid the negative effects while enjoying the great convenience. I believe that, once we try, we are bond to keep the balance of advantages and disadvantages.
篇三：关于科技的英语演讲稿—Technology and Future
the presence of students, ladies and teachers, everyone! i was prepared intervals of cloud today, in honor here entitled "technology and future" speech, i am very proud of both, but some unease. in recent years, we have seen our great motherland, the cause of the rapid development of technology, which allow me to a chinese i feel very proud. remember that long ago, cell phone use almost the only one, which is called, but a few years ago, cell phones has undergone great changes, not only look more beautiful, but also use more, you can use the phones to take pictures, meetings, internet, text
messages, etc. a series of things that i their life more convenient, so i am more aware of the strength of the technology, but i am just a fledglings students, "technology" as the word also aware of the limited, i am unable to use some very difficult theory to elaborate technology xuanji, no right to work on their elders i can promise of the technology blueprint. but i am willing to use a student’s perspective to the imagine technology and the future.
from genetic engineering "is a live princes" dream, nano-
technology "- not washing your clothing," promises; from artificial intelligence "will give you a cute robot dog" warm, transgenic
technology "let people grow mouse ears" wonders. the new technology in the birth of a new technology that will let people wild with joy, because these new technologies is gradually improving our lives, let us learn more about ourselves. in the near term, china completed its first sars virus genome sequencing, sars is now the world’s largest recognized the dangers of the disease, but why not other countries completed first, and we just completed the countriesvery simple, this illustrates that our country backward than others, worse than others, we look at the past, had just started a country’s reform and
opening up to the current level of science and technology has lead a large country, our motherland experienced a number of ups and downs, how many difficulties and bumpy however, we still back all of the motherland, the motherland because we firmly believe that - not only technological change destiny, can change the future.
for our generation, the general feeling of the community is a strong sense of competition, learning a foot down. science knowledge is the focus of our attention, albert einstein, and stephen hawking, bill gates is the star we have in mind, computer science, physics and chemistry of modern dynamic is constantly affect us. we have to understand the importance of technology, know that the technology universal.
although technology to create a new life prospects soliciting thoughts, inspiring. however, the final analysis is that we rely on our common efforts to realize. , as the future construction of the backbone of our generation of young people shoulders the burden is not light, new opportunities are always accompanied risks and
challenges, but we will not give up that easily, we use our youth to predecessors vowed: never live up to their predecessors of our hope. looking back at the history of civilization, anderson is the history of mankind against the darkness of ignorance, is the
scientific lit a fire in the raging human soul of hope; technology support civilization, science and technology to create the future, but the future is in our hands. let us become knowledge explorers, let us unknown roaming on the road, let me use our creativity to the world we live a better place.
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