This thesis aims at investigating what the discourse patterns are in the asking-for-leave notes written by Chinese students and native English speakers respectively and what excuses are given by Chinese students and n...This thesis aims at investigating what the discourse patterns are in the asking-for-leave notes written by Chinese students and native English speakers respectively and what excuses are given by Chinese students and native English speakers.Role play and retrospective interview were employed as research methords.The results show that the Chinese students all use an inductive pattern,while all native English speakers write the note in a deductive way.Besides,the excuses presented by the two kinds of subjects are different due to their different cultural background.展开更多
The solution of distributed mutual exclusion is difficult in Ad hoc networks owing to dynamic topologies and mobility. Based on the analysis of the properties of Ad hoc networks and the disadvantages of the traditiona...The solution of distributed mutual exclusion is difficult in Ad hoc networks owing to dynamic topologies and mobility. Based on the analysis of the properties of Ad hoc networks and the disadvantages of the traditional algorithms, an improved Ad hoc system model was given and a novel algorithm was presented as AHDME （Ad Hoc Distributed Mutual Exclusion）; it was based on the token-asking algorithms. It utilized broadcast to search for the token and to decrease the message complexity of multi-hop Ad hoc networks. Lamport＇s timestamp was improved to ensure the time sequence and to prevent nodes from starvation. When compared to traditional algorithms, AHDME does not require the fixed size of request queues and the global system information, which adapts itself to the frequent arrival/departures and the limited computing capability of nodes in Ad hoc networks. Performance analysis and simulation results show that the AHDME algorithm has low message complexity, small space complexity, and short response delay.展开更多
A: Hello, B. What’s the hurry?B: Well. we have a meeting And I’m afraid I’ll be late, Do youhave the time?A: It’s ten minuter to three.B: Good gracious. Then I’m early. And I thought I was
Mr King lives in a village.He has a piece of farm and he works hard on it.He is very busy and has little time to travel.This autumn he picked a lot of apples in his garden.He sold them in the town and got much money,s...Mr King lives in a village.He has a piece of farm and he works hard on it.He is very busy and has little time to travel.This autumn he picked a lot of apples in his garden.He sold them in the town and got much money,so he was going to travel in London.His wife asked him to take her there.He agreed with her and a few days later they took a train and left for the capital.They visited some places of interest,parks and zoos.Mrs King bought nice clothes for her family and they had a good time there.But one evening the woman felt unwell.Her husband had to take her to ahopital.But he didn’t know where the hospital was.He stopped a man and asked,“Excuseme,sir,which is the way to the hospital,please?”But the man didn’t know English.Mr King said sorry to him and had to ask others.He saw a few young men come out of a pub.He came up to them and asked them the way.They all drank too much.One of them said,“You’d better lie in the middle of the street and soon they will take you to the hospital.展开更多
文摘This thesis aims at investigating what the discourse patterns are in the asking-for-leave notes written by Chinese students and native English speakers respectively and what excuses are given by Chinese students and native English speakers.Role play and retrospective interview were employed as research methords.The results show that the Chinese students all use an inductive pattern,while all native English speakers write the note in a deductive way.Besides,the excuses presented by the two kinds of subjects are different due to their different cultural background.
基金the Application Fundamental Research Foundation of Sichuan Province, China(04JY029-017-2)the Innovation Fund for Small Technology-based Firms China(04JY029-017-2)
文摘The solution of distributed mutual exclusion is difficult in Ad hoc networks owing to dynamic topologies and mobility. Based on the analysis of the properties of Ad hoc networks and the disadvantages of the traditional algorithms, an improved Ad hoc system model was given and a novel algorithm was presented as AHDME （Ad Hoc Distributed Mutual Exclusion）; it was based on the token-asking algorithms. It utilized broadcast to search for the token and to decrease the message complexity of multi-hop Ad hoc networks. Lamport＇s timestamp was improved to ensure the time sequence and to prevent nodes from starvation. When compared to traditional algorithms, AHDME does not require the fixed size of request queues and the global system information, which adapts itself to the frequent arrival/departures and the limited computing capability of nodes in Ad hoc networks. Performance analysis and simulation results show that the AHDME algorithm has low message complexity, small space complexity, and short response delay.
文摘A: Hello, B. What’s the hurry?B: Well. we have a meeting And I’m afraid I’ll be late, Do youhave the time?A: It’s ten minuter to three.B: Good gracious. Then I’m early. And I thought I was
文摘Mr King lives in a village.He has a piece of farm and he works hard on it.He is very busy and has little time to travel.This autumn he picked a lot of apples in his garden.He sold them in the town and got much money,so he was going to travel in London.His wife asked him to take her there.He agreed with her and a few days later they took a train and left for the capital.They visited some places of interest,parks and zoos.Mrs King bought nice clothes for her family and they had a good time there.But one evening the woman felt unwell.Her husband had to take her to ahopital.But he didn’t know where the hospital was.He stopped a man and asked,“Excuseme,sir,which is the way to the hospital,please?”But the man didn’t know English.Mr King said sorry to him and had to ask others.He saw a few young men come out of a pub.He came up to them and asked them the way.They all drank too much.One of them said,“You’d better lie in the middle of the street and soon they will take you to the hospital.
