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一种多业务UPC/NPC结构模型
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作者 唐俊华 谭凯军 +1 位作者 顾尚杰 诸鸿文 《上海交通大学学报》 EI CAS CSCD 北大核心 1998年第10期30-33,38,共5页
ATM网络中的用法/网络参数控制(UPC/NPC)通过阻止有意或无意的用户滥用速率进入网络,以保护网络资源和其他用户的服务质量,因而是保证网络正常运行的重要手段.由于ATM网络为多种业务提供服务,而各种业务类型的特征... ATM网络中的用法/网络参数控制(UPC/NPC)通过阻止有意或无意的用户滥用速率进入网络,以保护网络资源和其他用户的服务质量,因而是保证网络正常运行的重要手段.由于ATM网络为多种业务提供服务,而各种业务类型的特征和服务质量要求相差很大,因此对ATM网络的UPC/NPC提出了新的要求.提出了一种ATM网络多业务UPC/NPC结构模型,该模型适用于包括ABR在内的全部现有ATM服务类型.由于采用了多种业务的统一接口,因此实现简单.同时,在对ABR业务实行UPC/NPC时,考虑到各种不同流量控制机制之间的兼容性.实验证明,该结构是简单有效的. 展开更多
关键词 用法 网络参数控制 可用比特率 ATM网络
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Adaptive neural network based sliding mode altitude control for a quadrotor UAV 被引量:4
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作者 Hadi RAZMI 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第11期2654-2663,共10页
Reasons and realities such as being non-linear of dynamical equations,being lightweight and unstable nature of quadrotor,along with internal and external disturbances and parametric uncertainties,have caused that the ... Reasons and realities such as being non-linear of dynamical equations,being lightweight and unstable nature of quadrotor,along with internal and external disturbances and parametric uncertainties,have caused that the controller design for these quadrotors is considered the challenging issue of the day.In this work,an adaptive sliding mode controller based on neural network is proposed to control the altitude of a quadrotor.The error and error derivative of the altitude of a quadrotor are the inputs of neural network and altitude sliding surface variable is its output.Neural network estimates the sliding surface variable adaptively according to the conditions of quadrotor and sets the altitude of a quadrotor equal to the desired value.The proposed controller stability has been proven by Lyapunov theory and it is shown that all system states reach to sliding surface and are remaining in it.The superiority of the proposed control method has been proven by comparison and simulation results. 展开更多
关键词 adaptive sliding mode controller analog neural network(ANN) altitude control of quadrotor parametric uncertainty
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