西瓜噬酸菌(Acidovorax citrulli)引起的瓜类细菌性果斑病(Bacterial fruit blotch,BFB)是一种世界性病害,严重危害西瓜和甜瓜产业,造成严重经济损失。研究该病害的发生特点、明确其病原菌的致病机制、研发与集成多种防治方法,对于瓜类...西瓜噬酸菌(Acidovorax citrulli)引起的瓜类细菌性果斑病(Bacterial fruit blotch,BFB)是一种世界性病害,严重危害西瓜和甜瓜产业,造成严重经济损失。研究该病害的发生特点、明确其病原菌的致病机制、研发与集成多种防治方法,对于瓜类细菌性果斑病的防治具有重要意义。虽然瓜类细菌性果斑病是瓜类产业发展的重要制约因素之一,但对其病原菌致病机制的研究尚不够深入,系统的防治策略也尚未建立。因此,国外学者多年来持续地针对西瓜噬酸菌的特点、检测与防治方法进行了研究。特别是近年来,瓜类细菌性果斑病病原菌的致病机制、检测方法,以及病害的防治方面都取得了新的进展,对近5年国外在瓜类果斑病相关研究中的新发现进行了综述,以期为该病害今后的研究和防治策略提供新的思路。展开更多
This paper proposes a channel and queue aware fair （CQAF） packet scheduling scheme for the downlink packet transmission in multiuser orthogonal frequency division multiplexing （OFDM） systems. By making use of the ...This paper proposes a channel and queue aware fair （CQAF） packet scheduling scheme for the downlink packet transmission in multiuser orthogonal frequency division multiplexing （OFDM） systems. By making use of the information on the channel conditions and the queue lengths, the proposed CQAF packet scheduling scheme efficiently allocates the subcarriers, transmission power and modulation level to users under the constraints of total transmission power, the number of subcarriers, bit-error-rate （BER） requirement and generalized processor sharing （GPS）-based fairness requirement. The numerical results show that the proposed CQAF packet scheduling scheme can reduce the transmission delay and queue length significantly while maximizing system throughput and maintaining fairness among users.展开更多
文摘西瓜噬酸菌(Acidovorax citrulli)引起的瓜类细菌性果斑病(Bacterial fruit blotch,BFB)是一种世界性病害,严重危害西瓜和甜瓜产业,造成严重经济损失。研究该病害的发生特点、明确其病原菌的致病机制、研发与集成多种防治方法,对于瓜类细菌性果斑病的防治具有重要意义。虽然瓜类细菌性果斑病是瓜类产业发展的重要制约因素之一,但对其病原菌致病机制的研究尚不够深入,系统的防治策略也尚未建立。因此,国外学者多年来持续地针对西瓜噬酸菌的特点、检测与防治方法进行了研究。特别是近年来,瓜类细菌性果斑病病原菌的致病机制、检测方法,以及病害的防治方面都取得了新的进展,对近5年国外在瓜类果斑病相关研究中的新发现进行了综述,以期为该病害今后的研究和防治策略提供新的思路。
基金Supported by the National High-Tech Research & Development Program of China (Grant Nos. 2007AA01Z207, 2007AA01Z268)Program forNew Century Excellent Talents in University, Research Fund of National Mobile Communications Research Laboratory, Southeast University(Grant No. 2008A06)+2 种基金the Open Research Fund of National Mobile Communications Research Laboratory, Southeast Universitythe startup fund of Nanjing University of Aeronautics and Astronauticsthe Open Research Fund of State Key Laboratory of Advance Optical Cmmunication Systems and Networks (Grant No. 2008SH06)
文摘This paper proposes a channel and queue aware fair （CQAF） packet scheduling scheme for the downlink packet transmission in multiuser orthogonal frequency division multiplexing （OFDM） systems. By making use of the information on the channel conditions and the queue lengths, the proposed CQAF packet scheduling scheme efficiently allocates the subcarriers, transmission power and modulation level to users under the constraints of total transmission power, the number of subcarriers, bit-error-rate （BER） requirement and generalized processor sharing （GPS）-based fairness requirement. The numerical results show that the proposed CQAF packet scheduling scheme can reduce the transmission delay and queue length significantly while maximizing system throughput and maintaining fairness among users.
