The problem of cloud cooperation of military service providers(MSPs) is addressed for allocating limited resources to military service users(MSUs) that are geographically distributed. The MSPs, also called militar...The problem of cloud cooperation of military service providers(MSPs) is addressed for allocating limited resources to military service users(MSUs) that are geographically distributed. The MSPs, also called military organization clouds, are virtualized and encapsulated by the services they can offer and each of them contains different kinds of resources that MSU needs. The MSPs are also geographically dispersed. They are required to allocate their resources to the MSU complying with the corresponding quality of service(QoS), so that each MSU gathers the services it needs to guarantee its task to be implemented. The outline of military organization cloud cooperation is discussed and the method of service optimal selection is proposed based on QoS evaluation. The QoS evaluation method based on exponential approximation is put forward to include the users' will. Simulation results verify the effectiveness of the proposed algorithm.展开更多
Set at the interface between second language acquisition and second language writing,this study examines how different types of written corrective feedback(WCF)influence the writing accuracy of Chinese college student...Set at the interface between second language acquisition and second language writing,this study examines how different types of written corrective feedback(WCF)influence the writing accuracy of Chinese college students learning English as a Foreign Language(EFL)and whether WCF facilitates the students’grasp of the focused linguistic knowledge.The participants(n=60)were divided into direct correction group(n=20),indirect error-coding group(n=20)and metalinguistic explanation group(n=20).The three groups wrote four essays in two months and received WCF for the first three essays on the five targeted error types,namely tense errors,confusion of different forms of a word,word(articles,prepositions,etc.)missing,errors in subjectverb agreement and inappropriate verb-noun collocations.The results show that all three types of WCF improved students’writing accuracy but none of them had any statistical advantage,and the metalinguistic WCF was more effective than the other two forms in facilitating the acquisition of the targeted linguistic features.These results shed some light on teaching and consolidation of language points through writing in EFL contexts.展开更多
This paper addresses the problem of service composition in military organization cloud cooperation(MOCC). Military service providers(MSP) cooperate together to provide military resources for military service users...This paper addresses the problem of service composition in military organization cloud cooperation(MOCC). Military service providers(MSP) cooperate together to provide military resources for military service users(MSU). A group of atom services, each of which has its level of quality of service(QoS), can be combined together into a certain structure to form a composite service. Since there are a large number of atom services having the same function, the atom service is selected to participate in the composite service so as to fulfill users' will. In this paper a method based on discrete particle swarm optimization(DPSO) is proposed to tackle this problem. The method aims at selecting atom services from service repositories to constitute the composite service, satisfying the MSU's requirement on QoS. Since the QoS criteria include location-aware criteria and location-independent criteria, this method aims to get the composite service with the highest location-aware criteria and the best-match location-independent criteria. Simulations show that the DPSO has a better performance compared with the standard particle swarm optimization(PSO) and genetic algorithm(GA).展开更多
College English teaching in China has long focused on importing cultures of English countries while neglecting to enhance students’English competence in home culture.The present research aims to investigate Chinese n...College English teaching in China has long focused on importing cultures of English countries while neglecting to enhance students’English competence in home culture.The present research aims to investigate Chinese non-English major undergraduates’competence in translating Chinese cultural items into English and the significant predictors of such competence.With a test and a questionnaire as research instruments,this study was conducted to assess 82 undergraduates’ability to translate three different levels of Chinese culture-specific items into English and explored the factors which might have affected the students’home culture translation ability.The results show that the participants did well in translating the surface layer cultural items,but their performance in sub-surface and deep layer culture translation tasks was far from being satisfactory.It was also found that students had positive attitudes towards Chinese culture and were willing to learn to express Chinese culture in English,but their English learning motivation in general was not strong enough,and they were not given much input on Chinese culture in their English class.Students’Chinese cultural knowledge and their awareness of the importance of learning Chinese culture in English were found to be the two significant factors that can predict their performance in the translation tasks.These findings have implications for the teaching of culture and cross-cultural communications in EFL classes.展开更多
Nematodes are serious constraints of crop production worldwide. However, the traditional nematicides suffer from the side-effects, including environmental and human toxicity. Herein, more than 70 novel piperazinedione...Nematodes are serious constraints of crop production worldwide. However, the traditional nematicides suffer from the side-effects, including environmental and human toxicity. Herein, more than 70 novel piperazinedione derivatives based on the natural product Barettin were synthesized and evaluated against the root-knot nematode Meloidogyne incognita(M. incognita). While most of synthesized compounds exhibited certain nematicidal activity at high concentration, the best one showed a nematicidal activity of 75% at 2.4 mmol/L.展开更多
基金supported by the National Natural Science Foundation of China(61573283)the National Basic Research Program of China(973 Program)(2010CB734104)
文摘The problem of cloud cooperation of military service providers(MSPs) is addressed for allocating limited resources to military service users(MSUs) that are geographically distributed. The MSPs, also called military organization clouds, are virtualized and encapsulated by the services they can offer and each of them contains different kinds of resources that MSU needs. The MSPs are also geographically dispersed. They are required to allocate their resources to the MSU complying with the corresponding quality of service(QoS), so that each MSU gathers the services it needs to guarantee its task to be implemented. The outline of military organization cloud cooperation is discussed and the method of service optimal selection is proposed based on QoS evaluation. The QoS evaluation method based on exponential approximation is put forward to include the users' will. Simulation results verify the effectiveness of the proposed algorithm.
文摘Set at the interface between second language acquisition and second language writing,this study examines how different types of written corrective feedback(WCF)influence the writing accuracy of Chinese college students learning English as a Foreign Language(EFL)and whether WCF facilitates the students’grasp of the focused linguistic knowledge.The participants(n=60)were divided into direct correction group(n=20),indirect error-coding group(n=20)and metalinguistic explanation group(n=20).The three groups wrote four essays in two months and received WCF for the first three essays on the five targeted error types,namely tense errors,confusion of different forms of a word,word(articles,prepositions,etc.)missing,errors in subjectverb agreement and inappropriate verb-noun collocations.The results show that all three types of WCF improved students’writing accuracy but none of them had any statistical advantage,and the metalinguistic WCF was more effective than the other two forms in facilitating the acquisition of the targeted linguistic features.These results shed some light on teaching and consolidation of language points through writing in EFL contexts.
基金supported by the National Natural Science Foundation of China(61573283)
文摘This paper addresses the problem of service composition in military organization cloud cooperation(MOCC). Military service providers(MSP) cooperate together to provide military resources for military service users(MSU). A group of atom services, each of which has its level of quality of service(QoS), can be combined together into a certain structure to form a composite service. Since there are a large number of atom services having the same function, the atom service is selected to participate in the composite service so as to fulfill users' will. In this paper a method based on discrete particle swarm optimization(DPSO) is proposed to tackle this problem. The method aims at selecting atom services from service repositories to constitute the composite service, satisfying the MSU's requirement on QoS. Since the QoS criteria include location-aware criteria and location-independent criteria, this method aims to get the composite service with the highest location-aware criteria and the best-match location-independent criteria. Simulations show that the DPSO has a better performance compared with the standard particle swarm optimization(PSO) and genetic algorithm(GA).
文摘College English teaching in China has long focused on importing cultures of English countries while neglecting to enhance students’English competence in home culture.The present research aims to investigate Chinese non-English major undergraduates’competence in translating Chinese cultural items into English and the significant predictors of such competence.With a test and a questionnaire as research instruments,this study was conducted to assess 82 undergraduates’ability to translate three different levels of Chinese culture-specific items into English and explored the factors which might have affected the students’home culture translation ability.The results show that the participants did well in translating the surface layer cultural items,but their performance in sub-surface and deep layer culture translation tasks was far from being satisfactory.It was also found that students had positive attitudes towards Chinese culture and were willing to learn to express Chinese culture in English,but their English learning motivation in general was not strong enough,and they were not given much input on Chinese culture in their English class.Students’Chinese cultural knowledge and their awareness of the importance of learning Chinese culture in English were found to be the two significant factors that can predict their performance in the translation tasks.These findings have implications for the teaching of culture and cross-cultural communications in EFL classes.
基金financially supported by the National Natural Science Foundation of China (No. 21572060)
文摘Nematodes are serious constraints of crop production worldwide. However, the traditional nematicides suffer from the side-effects, including environmental and human toxicity. Herein, more than 70 novel piperazinedione derivatives based on the natural product Barettin were synthesized and evaluated against the root-knot nematode Meloidogyne incognita(M. incognita). While most of synthesized compounds exhibited certain nematicidal activity at high concentration, the best one showed a nematicidal activity of 75% at 2.4 mmol/L.