Efficient spectrum resource allocation in wireless heterogeneous networks is important for improving the system throughput and guaranteeing the user's Quality-of-Service(QoS).In this paper,we propose an enhanced a...Efficient spectrum resource allocation in wireless heterogeneous networks is important for improving the system throughput and guaranteeing the user's Quality-of-Service(QoS).In this paper,we propose an enhanced algorithm for spectrum resource allocation in heterogeneous networks.First,the bandwidth of each user is determined by the user's rate demand and the channel state.Second,graph theory is enhanced and used to improve the spectrum efficiency.Third,spectrum resource is dynamically split between macrocell and femtocells with the changes of users' conditions.Our simulation results show that the proposed algorithm improves the system throughput significantly and also guarantees the fairness for the users.展开更多
Code-switching in English-teaching has been receiving growing atten-tion in recent years. Not being viewed as a random phenomenon, it has come to be seen as a highly purposeful activity. The present authors focus thei...Code-switching in English-teaching has been receiving growing atten-tion in recent years. Not being viewed as a random phenomenon, it has come to be seen as a highly purposeful activity. The present authors focus their study on Code-switching not in the language classroom but in authentic Lingual speech conlmunities.展开更多
基金supported in part by National Natural Science Foundation(61231008)Natural Science Foundation of Shannxi Province(2015JQ6248)+1 种基金National S&T Major Project(2012ZX03003005-005)the 111 Project (B08038)
文摘Efficient spectrum resource allocation in wireless heterogeneous networks is important for improving the system throughput and guaranteeing the user's Quality-of-Service(QoS).In this paper,we propose an enhanced algorithm for spectrum resource allocation in heterogeneous networks.First,the bandwidth of each user is determined by the user's rate demand and the channel state.Second,graph theory is enhanced and used to improve the spectrum efficiency.Third,spectrum resource is dynamically split between macrocell and femtocells with the changes of users' conditions.Our simulation results show that the proposed algorithm improves the system throughput significantly and also guarantees the fairness for the users.
文摘Code-switching in English-teaching has been receiving growing atten-tion in recent years. Not being viewed as a random phenomenon, it has come to be seen as a highly purposeful activity. The present authors focus their study on Code-switching not in the language classroom but in authentic Lingual speech conlmunities.
