4篇
您的检索式：作者名="Yu Zhiding"
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| 1 | An adaptive unsupervised approach toward pixel clustering and color image segmentation显示文摘 | Yu Zhiding Au O C Zou Ruobing | 2010 | Pattern Recognition2010，43，5： | 1 |
| 2 | Extended dynamic system modulation for real-time obstacle avoidance显示文摘In this paper,a novel real-time obstacle avoidance method based on Dynamic System(DS),is proposed.The proposed method ensures the impenetrability of multiple convex obstacles by online modulating the original velocity field of the DS.It can be applied to perform obstacle avoidance in the state space of the DS with both autonomous and non-autonomous DS-based controllers.While realizing the obstacle avoidance,the equilibrium points of the original DS can be saved.The modulation matrix form is extended based on the earlier dynamic system modulation methods of the literature.The asymmetric modulation provided by this method allows the modulated DS to satisfy the dynamic constraints of a class of DSs.In addition,the proposed method has the inherent ability of multiple-obstacle avoidance and the direction selectivity of avoidance maneuver.Moreover,to solve the simultaneous guidance and obstacle avoidance problem,a guidance law for Unmanned Aerial Vehicles(UAVs)based on the proposed method,is designed.Finally,a numerical simulation is performed to analyze the performance of the proposed method and the obstacle avoidance guidance law. | Zhide ZHANG Zhengjie WANG Jin YU | 2022 | Chinese Journal of Aeronautics2022，35，12： | 1 |
| 3 | An adaptive unsupervised approach toward pixel clustering and color image segmentation显示文摘 | Yu Zhiding Au O C Zou Ruobing | 2010 | Pattern Recognition2010，43，5： | 1 |
| 4 | Enhanced Mechanical Properties of AA5083 Matrix Composite via Introducing Al_(0.5)CoCrFeNi Particles and Cryorolling显示文摘High-entropy alloy particles(HEAPs)can markedly enhance the mechanical properties of metal matrix composites(MMCs).In this study,AA5083/Al_(0.5) CoCrFeNi HEAPs MMCs with diff erent HEAPs contents(0,1,and 3 wt%)were prepared via a stir-casting,and then these MMCs sheets were hot rolled(573 K)and cryorolled(77 K),respectively.The mechanical properties of the MMCs sheets were measured by tensile testing and microhardness test.Additionally,their microstructures were analyzed by scanning electron microscopy and transmission electron microscopy.Results revealed that the ultimate tensile strength(UTS)of the as-cast AA5083/Al_(0.5) CoC rF eN i HEAPs MMCs were improved from 203 to 257 MPa by adding 3 wt%HEAPs.And the mechanical properties of the MMCs sheets were improved after cryorolling.After cryorolling with 50%rolling reduction ratio,the MMCs with 1 wt%HEAPs had an UTS of 382 MPa,which was 1.9 times that of the MMCs before rolling.Finally,the strengthening mechanisms of HEAPs and cryorolling on the AA5083/HEAPs MMCs were discussed. | Hao Gu Zhide Li Kaiguang Luo Laxman Bhatta Hanqing Xiong Yun Zhang Charlie Kong Hailiang Yu | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，6： | 0 |
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