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A restoration method using dual generate adversarial networks for Chinese ancient characters

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Visual Informatics 2022年第1期6卷 26-34页

作者： Benpeng Su Xuxing Liu Weize Gao Ye Yang Shanxiong Chen College of Computer and Information Science Southwest UniversityChongqing 400715China chongqing key Lab of Automated Reasoning and cognition Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China

Ancient books that record the history of different periods are precious for human *** the protection of them is facing serious problems such as *** is significant to repair the damaged characters in ancient books and restore their original *** requirement of the restoration of the damaged character is keeping the stroke shape correct and the font style *** order to solve these problems,this paper proposes a new restoration method based on generative adversarial *** use the shape restoration network to complete the stroke shape recovery and the font style *** texture repair network is responsible for reconstructing texture *** order to improve the accuracy of the generator in the shape restoration network,we use the adversarial feature loss(AFL),which can update the generator and discriminator synchronously to replace the traditional perceptual ***,the font style loss is proposed to maintain the stylistic consistency for the whole *** model is evaluated on the datasets Yi and Qing,and shows that it outperforms current state-of-the-art techniques quantitatively and *** particular,the Structural Similarity has increased by 8.0%and 6.7%respectively on the two datasets.

关键词： Stroke shape restoration Texture restoration Calligraphy style

Memristor-based hyper-chaotic circuit for image encryption

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Chinese Physics B 2020年第11期29卷 259-270页

作者： Jiao-Jiao Chen Deng-Wei Yan Shu-Kai Duan Li-Dan Wang College of Electronic and Information Engineering Southwest UniversityChongqing 400715China chongqing key laboratory of Nonlinear Circuits and Intelligent Information Processing Southwest UniversityChongqing 400715China Intelligent Transmission and Control Technology Joint Engineering laboratory Chongqing 400715China Brain-inspired Computing and Intelligent Control chongqing key laboratory Chongqing 400715China chongqing Collaborative Innovation Center for Brain Science Chongqing 400715China School of Artificial Intelligence Southwest UniversityChongqing 400715China

The memristor is a kind of non-linear element with memory function,which can be applied to chaotic systems to increase signal randomness and *** this paper,a new four-dimensional hyper-chaotic system is designed based on a flux controlled memristor model,which can generate complex chaotic *** basic dynamic theory analysis and numerical simulations of the system,such as the stability of equilibrium points,the Lyapunov exponents and dimension,Poincare maps,the power spectrum,and the waveform graph prove that it has rich dynamic ***,the circuit implementation of this system is *** consistency of simulation program with integrated circuit emphasis(SPICE)simulation and numerical analysis proves the ability to generate ***,a new image encryption scheme is designed by using the memristor-based hyper-chaotic system proposed in this *** scheme involves a total of two *** using different security analysis factors,the proposed algorithm is compared with other image encryption schemes,including correlation analysis,information entropy,*** results show that the proposed image encryption scheme has a large key space and presents a better encryption effect.

关键词： memristor SPICE simulation hyper-chaotic system image encryption

Study on Edge Extraction Methods for image-based Icing On-line Monitoring on Overhead Transmission Lines

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高电压技术 2008年第12期34卷 2687-2693页

作者： WANG Xiao-peng HU Jian-lin WU Bin DU Lin SUN Cai-xin State key laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China chongqing Electric Power Co. Chongqing 400014 China

A new method of measuring the icing thickness of transmission lines on-line is proposed in this *** this method,the pictures of transmission lines which are photoed by the camera on the iron tower are processed immediately to extract the edges of the transmission line conductor and transmission line *** icing thickness can be gained by comparing the edges of the iced transmission line and the uniced *** icing image edge extraction methods are described in detail,that is,a method based on the combination of the wavelet transform and the floating threshold method and a method based on the combination of the optimal threshold method and the mathematical morphology *** icing images from the artificial climatic chamber and transmission lines are used to test the methods *** results show that the method based on the wavelet transform and the floating threshold method does well in the extraction of relatively smooth edges,such as glaze icing on conductor and icing on the insulator;meanwhile,the method based on the optimal threshold method and the mathematical morphology transform does well in the edge extraction of icing on the conductor,especially the opaque rime icing on the conductor with complicated edges.

关键词：输电线路覆冰层边缘提取方法小波转换图像

Evidence in Support of Analogical Reasoning Improvements with Executive Attention Intervention in Healthy Young Adults

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Neuroscience Bulletin 2022年第12期38卷 1476-1490页

作者： Yixuan Lin Qing Li Mengke Zhang Yujie Su Xiangpeng Wang Hong Li Antao Chen key laboratory of cognition and Personality of Ministry of Education Faculty of PsychologySouthwest UniversityChongqing 400715China Collaborative Innovation Center for Language Ability Jiangsu Key Laboratory of Language and Cognitive NeuroscienceSchool of Linguistic Sciences and ArtsJiangsu Normal UniversityXuzhou 221116China key laboratory of Brain cognition and Educational Science Ministry of EducationSchool of PsychologySouth China Normal UniversityGuangzhou 510631China School of Psychology Shanghai University of SportShanghai 200438China

Analogical reasoning improvement is important in educational outcome *** by recent ideas and evidence,we applied anti-saccade task training as an executive attention intervention and tested whether it could improve analogical reasoning performance.A serial-task paradigm was applied where participants performed an anti-saccade followed by an analogical reasoning task including a perception *** experimental group finished the anti-saccade task in which the ratio of anti-saccade trials to pro-saccade trials was 5:1 while the counterpart was 1:1 in the active control ***,a blank control group was established where participants merely finished the analogical reasoning ***-related electroencephalographic(EEG)data were recorded when participants were performing the executive attention and analogical reasoning *** addition,their resting state EEG was collected before and after the executive attention ***,the experimental group reacted significantly faster than the other two groups in analogical reasoning but not in *** the neural level,in the experimental group alone,the anti-saccade trials elicited a smaller N2 than pro-saccade trials and the resting alpha power was improved after executive attention *** significant difference in P2 was found between the two groups in analogical reasoning or perception but the experimental group showed a larger late positive component than the active control group in analogical *** also found that the late positive component mediated the relationship between the N2 of anti-saccade trials and analogical reasoning reaction times in the experimental *** further discussed the role of executive attention in the analogical reasoning process,which may pave the way for the future reliable improvement of fluid intelligence.

关键词： Analogical reasoning Executive attention Cognitive intervention Anti-saccade task Electroencephalography

Super-resolution reconstruction of images based on uncontrollable microscanning and genetic algorithm

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Optoelectronics Letters 2014年第4期10卷 313-316页

作者：代少升刘劲松向海燕杜智慧刘琴 chongqing key laboratory of Signal and Information Processing Chongqing University of Posts and Telecommunications

Aiming at these disadvantages like lack of details, poor contrast and blurry edges of infrared images reconstructed by traditional controllable microscanning super-resolution reconstruction(SRR), this paper proposes a novel algorithm, which samples multiple low-resolution images(LRIs) by uncontrollable microscanning, and then uses LRIs as chromosomes of genetic algorithm(GA). After several generations of evolution, optimal LRIs are got to reconstruct the high-resolution image(HRI). The experimental results show that the average gradient of the image reconstructed by the proposed algorithm is increased to 1.5 times of that of the traditional SRR algorithm, and the amounts of information, the contrast and the visual effect of the reconstructed image are improved.

关键词：遗传算法红外图像超分辨率微扫描不可控高分辨率图像边缘模糊低分辨率

Light focusing in linear arranged symmetric nanoparticle trimer on metal film system

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Chinese Physics B 2022年第1期31卷 540-546页

作者： Yuxia Tang Shuxia Wang Yingzhou Huang Yurui Fang State key laboratory of Coal Mine Disaster Dynamics and Control and chongqing key laboratory of Soft Condensed Matter Physics and Smart Materials College of PhysicsChongqing UniversityChongqing 400044China Applied Physics School of Computer Science and Information EngineeringChongqing Technology and Business UniversityChongqing 400067China key laboratory of Materials Modification by Laser Electronand Ion Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

Benefiting from the induced image charge on film surface,the nanoparticle aggregating on metal exhibits interesting optical *** this work,a linear metal nanoparticle trimer on metal film system has been investigated to explore the novel optical *** the electric field and surface charge distributions demonstrate the light is focused on film greatly by the nanoparticles at two sides,which could be strongly modulated by the wavelength of incident *** the influence of nanoparticle in middle on this light focusing ability has also been studied here,which is explained by the plasmon hybridization *** finding about light focusing in nanoparticle aggregating on metal film not only enlarges the novel phenomenon of surface plasmon but also has great application prospect in the field of surface-enhanced spectra,surface catalysis,solar cells,water splitting,etc.

关键词： electric field enhancement light focusing nanoparticle trimer on metal film system plasmonic hybridization

Design of pure aluminum laminates with heterostructures for extraordinary strength-ductility synergy

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Journal of Materials Science & Technology 2022年第5期100卷 193-205页

作者： Xiang Chen Baoxuan Zhang Qin Zou Guangsheng Huang Shuaishuai Liu Junlei Zhang Aitao Tang Bin Jiang Fusheng Pan State key laboratory of Mechanical Transmission College of Materials Science and EngineeringChongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

Heterogeneous metals and alloys are a new class of materials with superior mechanical *** this paper,we engineered sandwich-structured pure aluminum laminates composed of middle coarse-grained layer and outer fine-grained layer via extrusion,rolling and *** controlling the post-annealing regimes,a larger degree of microstructure heterogeneities such as boundary spacing,misorientation and texture across the hetero-interface were obtained,which resulted in obvious mechanical *** tests indicated that the 300℃/30 min annealed laminates enabled a relatively high tensile ductility while simultaneously retaining a high strength,which was better than prediction by the *** explain the reasons behind it,the evolution of geometrically necessary dislocations and strain gradient at the hetero-interface zone were detected using in-situ tension and microscopic digital image correlation *** was found that with the increasing applied strain,a significant strain gradient was developed near the interface,which was accommodated by geometrically necessary dislocations,thereby contributing to higher hetero-deformation induced(HDI)strengthening and hardening.

关键词： Pure aluminum Laminates Annealing Heterostructures HDI strengthening and hardening

Three-dimensional reconstruction of light microscopy image sections： present and future

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Frontiers of Medicine 2015年第1期9卷 30-45页

作者： Yuzhen Wang Rui Xu Gaoxing Luo Jun Wu Institute of Burn Research Southwest Hospital State Key Laboratory of Trauma Burns and Combined lnjury Chongqing Key Laboratory for Diseases Proteomics the Third Military Medical University Chongqing 400038 China

Three-dimensional （3D） image reconstruction technologies can reveal previously hidden microstruc-tures in human tissue. However, the lack of ideal, non-destructive cross-sectional imaging techniques is still a problem. Despite some drawbacks, histological sectioning remains one of the most powerful methods for accurate high-resolution representation of tissue structures. Computer technologies can produce 3D representations of interesting human tissue and organs that have been serial-sectioned, dyed or stained, imaged, and segmented for 3D visualization. 3D reconstruction also has great potential in the fields of tissue engineering and 3D printing. This article outlines the most common methods for 3D tissue section reconstruction. We describe the most important academic concepts in this field, and provide critical explanations and comparisons. We also note key steps in the reconstruction procedures, and highlight recent progress in the development of new reconstruction methods.

关键词： microtomy 3D imaging computer-assisted image processing 3D printing tissue scaffold

Equivalent magnetic dipole method used to design gradient coil for unilateral magnetic resonance imaging

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Chinese Physics B 2018年第5期27卷 545-550页

作者： Zheng Xu Xiang Lil Pan Guo Jia-Min Wu State key laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044China School of Physics and Electronic Engineenng Chongqing Normal UniversityChongqing 401331China

The conventional magnetic resonance imaging(MRI)equipment cannot measure large volume samples nondestructively in the engineering site for its heavy weight and closed *** order to realize the mobile MRI,this study focuses on the design of gradient coil of unilateral *** unilateral MRI system is used to image the local area above the *** current density distribution of the gradient coil cannot be used as a series of superconducting nuclear magnetic resonance gradient coils,because the region of interest(ROI)and the wiring area of the unilateral magnet are both cylindrical side arc ***,the equivalent magnetic dipole method is used to design the gradient coil,and the algorithm is improved for the special case of the wiring area and the ROI,so the X and Y gradient coils are ***,a flexible printed circuit board(PCB)is used to fabricate the gradient coil,and the magnetic field distribution of the ROI is measured by a Gauss meter,and the measured results match with the simulation *** gradient linearities of x and y coils are 2.82%and 3.56%,respectively,less than 5%of the commercial gradient coil requirement.

关键词： unilateral MRI equivalent magnetic dipole method gradient coil current density distribution