3Do F VR是VR视频的一种代表性形态,也是目前虚拟现实领域普遍应用的形式。图像质量是一项会影响用户真实沉浸视觉感受的VR视频QoE的重要指标。目前国内外暂未形成VR视频领域图像质量主观评价的标准方法,为此,本文研究提出了一套3Do F V...3Do F VR是VR视频的一种代表性形态,也是目前虚拟现实领域普遍应用的形式。图像质量是一项会影响用户真实沉浸视觉感受的VR视频QoE的重要指标。目前国内外暂未形成VR视频领域图像质量主观评价的标准方法,为此,本文研究提出了一套3Do F VR视频图像质量主观评价方法。文章首先对VR视频主观评价的挑战、国内外进展进行分析调研,随后着重阐述了3Do F VR视频主观评价前期准备研究、主观评价量表设计、主观评价打分方法改进、实验序列制作等环节,最后进行了3DoF VR视频图像质量主观评价实验,并对实验数据进行了分析和总结。展开更多
state space algorithms are proposed for the three degree of freedom (3DOF) optimal Wiener Hopf controller for a class of systems with time delay feedback sensors and employed in the design of a terrain following ...state space algorithms are proposed for the three degree of freedom (3DOF) optimal Wiener Hopf controller for a class of systems with time delay feedback sensors and employed in the design of a terrain following control system, with the influence caused by the delay of baric altimeter successfully eliminated.展开更多
A 3DOF (three degrees of freedom) helicopter attitude control system with multi-operationpoints is described as a MIMO time-varying uncertain nonlinear system with unknown constant param-eters,bounded disturbance and ...A 3DOF (three degrees of freedom) helicopter attitude control system with multi-operationpoints is described as a MIMO time-varying uncertain nonlinear system with unknown constant param-eters,bounded disturbance and nonlinear uncertainty,and a robust output feedback control methodbased on signal compensation is proposed.A controller designed by this method consists of a nominalcontroller and a robust compensator.The controller is linear time-invariant and can be realized easily.Robust attitude tracking property of closed-loop system is proven and experimental results show thatthe designed control system can guarantee high precision robust attitude control under multi-operationpoints.展开更多
文摘3Do F VR是VR视频的一种代表性形态,也是目前虚拟现实领域普遍应用的形式。图像质量是一项会影响用户真实沉浸视觉感受的VR视频QoE的重要指标。目前国内外暂未形成VR视频领域图像质量主观评价的标准方法,为此,本文研究提出了一套3Do F VR视频图像质量主观评价方法。文章首先对VR视频主观评价的挑战、国内外进展进行分析调研,随后着重阐述了3Do F VR视频主观评价前期准备研究、主观评价量表设计、主观评价打分方法改进、实验序列制作等环节,最后进行了3DoF VR视频图像质量主观评价实验,并对实验数据进行了分析和总结。
文摘state space algorithms are proposed for the three degree of freedom (3DOF) optimal Wiener Hopf controller for a class of systems with time delay feedback sensors and employed in the design of a terrain following control system, with the influence caused by the delay of baric altimeter successfully eliminated.
基金supported by the National Natural Science Foundation of China under Grant Nos. 60674017 and 60736024
文摘A 3DOF (three degrees of freedom) helicopter attitude control system with multi-operationpoints is described as a MIMO time-varying uncertain nonlinear system with unknown constant param-eters,bounded disturbance and nonlinear uncertainty,and a robust output feedback control methodbased on signal compensation is proposed.A controller designed by this method consists of a nominalcontroller and a robust compensator.The controller is linear time-invariant and can be realized easily.Robust attitude tracking property of closed-loop system is proven and experimental results show thatthe designed control system can guarantee high precision robust attitude control under multi-operationpoints.
