4篇
您的检索式：作者名="Haoyao Zhang"
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| 1 | Natural Feature-based Visual Servoing for Grasping Target with an Aerial Manipulator显示文摘Aerial transportation and manipulation have attracted increasing attention in the unmanned aerial vehicle field,and visual servoing methodology is widely used to achieve the autonomous aerial grasping of a target object.However,the existing marker-based solutions pose a challenge to the practical application of target grasping owing to the difficulty in attaching markers on targets.To address this problem,this study proposes a novel image-based visual servoing controller based on natural features instead of artificial markers.The natural features are extracted from the target images and further processed to provide servoing feature points.A six degree-of-freedom(6-DoF)aerial manipulator system is proposed with differential kinematics deduced to achieve aerial grasping.Furthermore,a controller is designed when the target object is outside a manipulator's workspace by utilizing both the degrees-of-freedom of nnmanned aerial vehicle and manipulator joints.Thereafter,a weight matrix is used as basis to develop a multi-tasking visual servoing framework to integrate the controllers inside and outside the manipulator's workspace.Lastly,experimental results are provided to verify the effectiveness of the proposed approach. | Bin Luo Haoyao Chen Fengyu Quan Shiwu Zhang Yunhui Liu | 2020 | Journal of Bionic Engineering2020，17，2： | 4 |
| 2 | Principal component analysis method applying to earthquake -damaged reservoir* s comprehensive Evaluation 显示文摘 | Zheng Haoyao Sheng Jinbao Zhang Shichen Sun Weiwei | 2012 | ProcediaEngineering2012，，107： | 1 |
| 3 | Beagle Dogs Have Low Susceptibility to Florida Clade 2 H3N8 Equine Avian Influenza显示文摘Dear Editor,Dogs were long considered refractory to influenza viruses until the equine-origin H3N8 canine influenza virus(CIV)was first isolated in the United States of America(U.S.A)in 2004(Crawford et al.2005).Since then,H3N8 CIV of equine-origin strains has been circulating in dogs in the U.S.A.In 2006,another CIV of avian origin H3N2 subtype was isolated from dogs in China(Li et al.2010).Recently,H3N2 CIV strains have become endemic in dog populations in China,South Korea,and North America(Borland et al.2020). | Pei Zhou Xiangyu Xiao Xinkai Hu Jie Dong Haoyao Zhang Yanchao Li Shoujun Li | 2021 | Virologica Sinica2021，36，5： | 0 |
| 4 | The exploration of flow pattern in the superior vena cava of healthy adults:A 4D flow magnetic resonance imaging study显示文摘Our study sought to investigate the blood flow pattern in the superior vena cava(SVC)of healthy adults and to describe the development and characteristics of the flow pattern using 4D flow magnetic resonance imaging(MRI).4D flow MRI data with full coverage of SVC and brachiocephalic veins(BVs)were acquired with a 3-Testa MRI in thirty healthy adults(age:28.70±9.09).Hemodynamic parameters in the SVC,including velocity,velocity vector,flow visualization(pathlines,streamlines),flow waveform and energy loss,were obtained with specialized commercial post-processing software based on 4D flow MRI data.This study found that:(1)The SVC has a pulsating flow waveform with double peaks.(2)Based on BVs flow of the SVC pathline visualization,flow patterns could be divided into three development types:twining(n=14),untwining(n=)and no helical flow(n=7).(3)With the decreasing blood velocity,helical flow areas tended to gradually extend.(4)There were no significant differences in most hemodynamic parameters among the three types.The exploration of the blood flow characteristics of normal SVC may be the first step for capturing pathogenic features before the patients develop symptoms with a certain positive significance.The potential physiological significance of these phenomena deserves more exploration in future studies. | Huaxia Pu Haoyao Cao Yubo Fan Jinge Zhang Simeng Wang Zhan Liu Xiaoyue Zhou Ning Jin Tinghui Zheng Liqing Peng | 2023 | Medicine in Novel Technology and Devices2023，，2： | 0 |
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