This paper analyzes the multiplex composite function of agriculture comprehensively as follows.The first is political function:it can ensure the national food security;the second is economic function:it can promote ag...This paper analyzes the multiplex composite function of agriculture comprehensively as follows.The first is political function:it can ensure the national food security;the second is economic function:it can promote agricultural competitiveness and increase farmers' income;the third is social function:it can promote the construction of new socialist village;the fourth is ecological function:it can conserve the resources environment and guarantee sustainable development of agriculture.In terms of reference of international theory and the main innovative experience of domestic agricultural modernization practice,this paper points out the new approach for agricultural modernization practice in China,and puts forward institutional guarantee based on agricultural multiplex function as follows:we should gradually promote new land system taking land transfer as major content;we should establish rational transfer system of rural labour forces;we should establish virtuous circular agricultural financial credit system;we should hew to the innovation and promotion system of agricultural technology;we should establish strict the system of resources environment and ecological protection;we should establish the agricultural risk security system.展开更多
To support the drastic growth of wireless multimedia services and the requirements of ubiquitous access, numerous wireless infrastructures which consume enormous energy, such as macrocell, small cell, distributed ante...To support the drastic growth of wireless multimedia services and the requirements of ubiquitous access, numerous wireless infrastructures which consume enormous energy, such as macrocell, small cell, distributed antenna systems and wireless sensor networks, have been deployed. Under the background of environmental protection, improving the energy efficiency（EE） in wireless networks is becoming more and more important. In this paper, an EE enhancement scheme in heterogeneous networks（Het Nets） by using a joint resource allocation approach is proposed. The Het Nets consists of a mix of macrocell and small cells. Firstly, we model this strategic coexistence as a multi-agent system in which decentralized resource management inspired from Reinforcement Learning are devised. Secondly, a Q-learning based joint resource allocation algorithm is designed. Meanwhile, with the consideration of the time-varying channel characteristics, we take the long-term learning reward into account. At last, simulation results show that the proposed decentralized algorithm can approximate to centralized algorithm with low-complexity and obtain high spectral efficiency（SE） in the meantime.展开更多
This paper analyzes the accuracy and appropriacy of the recorded data from a group of Chinese-speaking English learners who has finished three communicative tasks set in different contexts.It also tries to find out ho...This paper analyzes the accuracy and appropriacy of the recorded data from a group of Chinese-speaking English learners who has finished three communicative tasks set in different contexts.It also tries to find out how the participants' learning history and the present Chinese EFL context influence their performance.The results suggest that the participants rely on a limited set of request,apology,and refusal strategies.And it is evident that low-level learners often refer to their L1 for sentence constructions and lexical items.Although the evidence is still fragmentary,enough exists to indicate that transfer involving discourse can often occur in foreign language acquisition.展开更多
基金Supported by National Social Sciences Foundation Key Project(08AJY003)
文摘This paper analyzes the multiplex composite function of agriculture comprehensively as follows.The first is political function:it can ensure the national food security;the second is economic function:it can promote agricultural competitiveness and increase farmers' income;the third is social function:it can promote the construction of new socialist village;the fourth is ecological function:it can conserve the resources environment and guarantee sustainable development of agriculture.In terms of reference of international theory and the main innovative experience of domestic agricultural modernization practice,this paper points out the new approach for agricultural modernization practice in China,and puts forward institutional guarantee based on agricultural multiplex function as follows:we should gradually promote new land system taking land transfer as major content;we should establish rational transfer system of rural labour forces;we should establish virtuous circular agricultural financial credit system;we should hew to the innovation and promotion system of agricultural technology;we should establish strict the system of resources environment and ecological protection;we should establish the agricultural risk security system.
文摘To support the drastic growth of wireless multimedia services and the requirements of ubiquitous access, numerous wireless infrastructures which consume enormous energy, such as macrocell, small cell, distributed antenna systems and wireless sensor networks, have been deployed. Under the background of environmental protection, improving the energy efficiency（EE） in wireless networks is becoming more and more important. In this paper, an EE enhancement scheme in heterogeneous networks（Het Nets） by using a joint resource allocation approach is proposed. The Het Nets consists of a mix of macrocell and small cells. Firstly, we model this strategic coexistence as a multi-agent system in which decentralized resource management inspired from Reinforcement Learning are devised. Secondly, a Q-learning based joint resource allocation algorithm is designed. Meanwhile, with the consideration of the time-varying channel characteristics, we take the long-term learning reward into account. At last, simulation results show that the proposed decentralized algorithm can approximate to centralized algorithm with low-complexity and obtain high spectral efficiency（SE） in the meantime.
文摘This paper analyzes the accuracy and appropriacy of the recorded data from a group of Chinese-speaking English learners who has finished three communicative tasks set in different contexts.It also tries to find out how the participants' learning history and the present Chinese EFL context influence their performance.The results suggest that the participants rely on a limited set of request,apology,and refusal strategies.And it is evident that low-level learners often refer to their L1 for sentence constructions and lexical items.Although the evidence is still fragmentary,enough exists to indicate that transfer involving discourse can often occur in foreign language acquisition.
