在大规模图像可视化应用中,经过四叉树预处理,建立多分辨率图像金字塔索引,以支持对不同分辨率图像的快速读取及显示。但是在显示图像分辨率与金字塔中保存图像分辨率不一致情况下,依然需要通过图像重采样来获得指定分辨率图像。一般重...在大规模图像可视化应用中,经过四叉树预处理,建立多分辨率图像金字塔索引,以支持对不同分辨率图像的快速读取及显示。但是在显示图像分辨率与金字塔中保存图像分辨率不一致情况下,依然需要通过图像重采样来获得指定分辨率图像。一般重采样过程可以通过基于CPU或者GPU的重采样方法来完成。论文通过建立RECG(resampling evalua-tion on CPU and GPU)模型根据图像大小及缩放要求来评估其在CPU和GPU中重采样效率,据此选择基于CPU或者GPU的重采样方式,并且在此基础上建立了CPU-GPU图像块缓存策略。试验表明:根据RECG模型,对于不同的重采样比例,采取不同的重采样方式,有效地加速了重采样速度。展开更多
This paper presents a speed sensorless vector control system for induction machine (IM),which is based on a flux observer. According to vector control theory of IM,the q-axis rotor flux converging on zero is utilized ...This paper presents a speed sensorless vector control system for induction machine (IM),which is based on a flux observer. According to vector control theory of IM,the q-axis rotor flux converging on zero is utilized for speed estimation. Additionally this system solved the online identification of stator resistance by d-axis flux error. The advantages of the proposed system are simplicity and avoidance of the problems caused by only using a voltage model. The effectiveness of the proposed system has been verified by simulation and experimentation.展开更多
Damping a hybrid stepping motor with estimated position and velocity,Grid current regulation of a three-phase voltage source inverter with an LCL input filter,Torsional interaction studies on power system compensated ...Damping a hybrid stepping motor with estimated position and velocity,Grid current regulation of a three-phase voltage source inverter with an LCL input filter,Torsional interaction studies on power system compensated by SSSC and fixed capacitor,A multivariable new control solution for increased long lines voltage restoration stability during black startup,展开更多
文摘在大规模图像可视化应用中,经过四叉树预处理,建立多分辨率图像金字塔索引,以支持对不同分辨率图像的快速读取及显示。但是在显示图像分辨率与金字塔中保存图像分辨率不一致情况下,依然需要通过图像重采样来获得指定分辨率图像。一般重采样过程可以通过基于CPU或者GPU的重采样方法来完成。论文通过建立RECG(resampling evalua-tion on CPU and GPU)模型根据图像大小及缩放要求来评估其在CPU和GPU中重采样效率,据此选择基于CPU或者GPU的重采样方式,并且在此基础上建立了CPU-GPU图像块缓存策略。试验表明:根据RECG模型,对于不同的重采样比例,采取不同的重采样方式,有效地加速了重采样速度。
文摘This paper presents a speed sensorless vector control system for induction machine (IM),which is based on a flux observer. According to vector control theory of IM,the q-axis rotor flux converging on zero is utilized for speed estimation. Additionally this system solved the online identification of stator resistance by d-axis flux error. The advantages of the proposed system are simplicity and avoidance of the problems caused by only using a voltage model. The effectiveness of the proposed system has been verified by simulation and experimentation.
文摘Damping a hybrid stepping motor with estimated position and velocity,Grid current regulation of a three-phase voltage source inverter with an LCL input filter,Torsional interaction studies on power system compensated by SSSC and fixed capacitor,A multivariable new control solution for increased long lines voltage restoration stability during black startup,
