Guoran Hua

Nantong University

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Yupeng Cao

Weifang University

Yupeng Cao

Nantong University

Zongjun Tian

Nanjing University of Aeronautics and Astronautics

Xingguo Zhang

Nantong University

Haotian Chen

University of Chinese Academy of Sciences

Boyuan Xu

Institute of Information Engineering

Zhou Dongcheng

Boyong Su

Nantong University

Ai-ping Qian

Zhejiang University

Zhiyu Qian

Nanjing University of Aeronautics and Astronautics

Cooperative Institutions

Nantong University

Nanjing University of Aeronautics and Astronautics

Chinese Academy of Sciences

Nanjing University

Jiangsu Industry Technology Research Institute

China University of Mining and Technology

Soochow University

Southeast University

Beijing Institute of Technology

Taiyuan University of Technology

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Influence of interaction parameters on laser shock wave induced dynamic strain on 7050 aluminum alloy surface

Journal of Applied Physics (2014)

Yupeng Cao Feng Aixin Guoran Hua

To study the effects of overlay and laser power density on dynamic strain, the dynamic strain induced by a pulsed laser shock wave on a 7050 aluminum alloy surface was measured using a polyvinylidene fluoride (PVDF) piezoelectric sensor. A dynamic strain model of the 7050 aluminum alloy surface under the pulsed laser shock wave load was established based on our hypothesis. The results showed that, under the influence of a constraining layer, the laser's thermal effect was negligible when the laser power density was higher than 1.4 GW/cm2. When the material surface was loaded by the laser for 140 ns, a surface wave was detected by the PVDF sensor, but when the laser power density was less than 12.7 GW/cm2, coupling between the shock wave and the surface wave did not occur. The dynamic stress-strain relationship curve of the 7050 aluminum alloy under the high strain rate of the pulsed laser shock wave was similar to the static stress-strain relationship curve of the 7050 aluminum alloy under static tensile conditions. The experimental results were consistent with the results of the dynamic strain model of the 7050 aluminum alloy surface under the pulsed laser shock wave load.

10.1063/1.4898689

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Citations (18)

Local deformation and macro distortion of TC4 titanium alloy during laser shock processing

The International Journal of Advanced Manufacturing Technology (2020)

Boyong Su Heng Wang Yupeng Cao Xu Pei Guoran Hua

Distortion (music)

Titanium alloy

10.1007/s00170-020-05058-7

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Citations (13)

Annular laser metal deposition of Ti-6Al-4V alloy in a semi-open environment: Process optimization, microstructure and mechanical properties

Optik (2023)

Jinchao Zhang Yupeng Cao Heng Wang Tuo Shi Boyong Su

Deposition

Chromatic aberration

Process window

10.1016/j.ijleo.2023.171014

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Citations (3)

Mechanism of Recast Removal During Laser Drilling Underwater

Advanced Science Letters (2011)

Hua Zhang Jiawen Xu Jianshe Zhao Guoran Hua

Laser drilling

10.1166/asl.2011.1666

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Citations (5)

Automatic estimation of the object pose for industrial robots

IEEE International Workshop on Imaging Systems and Techniques (2009)

Haili Xu Sun’an Wang Xingguo Zhang Guoran Hua

An industrial robot equipped with a camera system requires robust and accurate estimation of the pose of a target object. The pose estimation is achieved by a three-dimensional registration method. This paper presents this novel method for the registration of the rotated and translated part according to its camera images and three-dimensional model. The spatial registration parameters can be computed by finding which projection of the volume is the most similar to the given image. We propose a three-step procedure. First, we compute the Fourier transform (FT) of the volume projection by using FT projection theorem. Then, a cost function is designed according to the magnitude of projection FT and image FT. Last, an optimization algorithm called small world clonal selection algorithm (SWCSA) is applied to obtain spatial registration parameters. SWCSA combines the good local search ability in clonal selection algorithm and the random long-range search operator in small world, so the global optimization ability is enhanced. Experimental results demonstrate that the registration is accurate and robust.

Image registration

10.1109/ist.2009.5071664

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Citations (2)

Investigation on a new local control technology with near-infrared spectroscopy for laser induced interstitial thermotherapy

Journal of Physics Conference Series (2011)

Guoran Hua Hua Zhang Ai-ping Qian Zhiyu Qian

In order to control the treatment of laser-induced interstitial thermotherapy, a new local control technique is put forward, which use a functional near infrared spectroscopy (fNIRS) system. The temperature of biological tissue is regarded as the most important indicator for treatment of LITT. So, based on the experiments of LITT being performed on a liver cancer, the temperature and reducing scattering coefficient have been obtained in real time, respectively, with probe-type thermometer and fNIRS system. The results of the two factors have the same trend with different power of laser. It is confirmed that the fNIRS can be a useful local control technology for LITT.

Thermometer

Biological tissue

10.1088/1742-6596/276/1/012020

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Citations (1)

TMAHに基づく太陽電池裏面研磨プロセスの研究【Powered by NICT】

Gongneng Cailiao (2015)

Wang Qiang Yang Dongqin Guoran Hua

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Structural Feature Extraction From Regular-Shaped Rigid Objects(2)

Lei Zhang Qingshan Fu Xingguo Zhang Guoran Hua Zhu Longbiao

The structural feature extraction from regular- shaped rigid objects is continuously studied. Some rules based on prior knowledge are proposed to improve the effects of the same subject(1). First, some rules are introduced for recovery of the missing true features. Then, some rules for distinguishment between true features and pseudo features are proposed, which is suggested be executed in a recursive way. Last, a graph structure that represents the connection of the corners is established, which group the corner features according to connectivity components. Experiments validate that the proposed approaches have higher detection rate and much lower error rate than the approach in the same subject(1). The proposed approaches make complete the true features on the silhouette of the objects and remove many pseudo features. All these pave the way for future structural recognition.

Feature (linguistics)

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レーザ衝撃による表面残留応力の定量的制御の研究進展【JST・京大機械翻訳】

Jiguang Yu Dianzixue Jinzhan (2016)

Guoran Hua Zhou Dongcheng Yupeng Cao Feng Aixin Chen Haotian

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Simulation and experimental study on temperature field in tumor during laser induced thermotherapy

WIT transactions on modelling and simulation (2014)

Ai-ping Qian Guoran Hua Zhiyu Qian

10.2495/smta141592

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Citations (1)