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Multi-Stage-Based Siamese Neural Network for Seal Image Recognition

Computer Modeling in Engineering & Sciences 2025年第1期142卷 405-423页

作者： Jianfeng Lu Xiangye Huang Caijin Li Renlin Xin shanqing zhang Mahmoud Emam School of Computer Science and Technology Hangzhou Dianzi UniversityHangzhou310018China Shangyu Institute of Science and Engineering Hangzhou Dianzi UniversityShaoxing312300China Faculty of Artificial Intelligence Menoufia UniversityShebin El-Koom32511Egypt

Seal authentication is an important task for verifying the authenticity of stamped seals used in various domains to protect legal documents from tampering and *** seal inspection is commonly audited manually to ensure document ***,manual assessment of seal images is tedious and laborintensive due to human errors,inconsistent placement,and completeness of the *** image recognition systems are inadequate enough to identify seal types accurately,necessitating a neural network-based method for seal image ***,neural network-based classification algorithms,such as Residual Networks(ResNet)andVisualGeometryGroup with 16 layers(VGG16)yield suboptimal recognition rates on stamp ***,the fixed training data categories make handling new categories to be a challenging *** paper proposes amulti-stage seal recognition algorithmbased on Siamese network to overcome these ***,the seal image is pre-processed by applying an image rotation correction module based on Histogram of Oriented Gradients(HOG).Secondly,the similarity between input seal image pairs is measured by utilizing a similarity comparison module based on the Siamese ***,we compare the results with the pre-stored standard seal template images in the database to obtain the seal *** evaluate the performance of the proposed method,we further create a new seal image dataset that contains two subsets with 210,000 valid labeled pairs in *** proposed work has a practical significance in industries where automatic seal authentication is essential as in legal,financial,and governmental sectors,where automatic seal recognition can enhance document security and streamline validation ***,the experimental results show that the proposed multi-stage method for seal image recognition outperforms state-of-the-art methods on the two established datasets.

关键词： Seal recognition seal authentication document tampering siamese network spatial transformer network similarity comparison network

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Suppressing Li Dendrites via Electrolyte Engineering by Crown Ethers for Lithium Metal Batteries

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Nano-Micro Letters 2020年第11期12卷 226-228页

作者： shanqing zhang Centre for Clean Environment and Energy School of Environment and ScienceGold Coast CampusGriffith UniversitySouthportQLD 4222Australia

Electrolyte engineering is considered as an effective strategy to establish stable solid electrolyte interface(SEI),and thus to suppress the growth of lithium *** a recent study reported in Advanced Functional Materials by Ma group,discovered that strong coordination force could be founded between 15-Crown-5 ether(15-C-5) and Li+,which facilitates the crown ether(15-C-1) to participate in the solvation structure of Li+ in the electrolyte for the same *** a novel strategy might impact the design of highperformance and safe lithium metal batteries(LMB s).

关键词： Li dendrites Crown ethers Lithium metal batteries Electrolyte

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Photoelectrocatalytic activity of an ordered and vertically aligned TiO2 nanorod array/BDD heterojunction electrode

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Science Bulletin 2017年第9期62卷 619-625页

作者： Yanhe Han Lei zhang Yafei Wang Haimin zhang shanqing zhang Department of Environmental Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China Key Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsAnhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of SolidState PhysicsChinese Academy of SciencesHefei 230031China Griffith School of Environment Gold Coast CampusGriffith UniversityQLD 4222Australia

Rutile TiO_2 nanorod(TiNR) arrays were fabricated on a boron-doped diamond(BDD) substrate by a simple hydrothermal synthesis method. A fluorine-doped tin oxide(FTO) electrode grown with TiNR arrays was also prepared using the same technology for comparison. Field-emission scanning electron microscopy results show that oriented TiNR arrays can grow vertically on the surface of BDD and FTO electrodes. TiNR arrays grown on both electrodes had the same length(3 μm). In comparison with the TiNR/FTO electrode, the TiNR/BDD electrode demonstrated a higher photoelectrocatalytic activity for the degradation of water and organic compounds, which is mostly attributed to the formation of a p-n heterojunction between the TiNR arrays and BDD at high potential, apart from the density of TiNR. A linear relationship between the photoelectrocatalytic current and the organic concentration can be observed on both electrodes. However, the linear range between net photoelectrocatalytic current values and organic compound concentrations for the TiNR/BDD electrode are much greater than those for the TiNR/FTO electrode, which makes the TiNR/BDD electrode a versatile material for the photocatalytic degradation and sensing of organic compounds.

关键词： Rutile Ti02 nanorods One-dimensioned nanomaterials Boron-doped diamond Photoelectrocatalysis p-n heterojunction

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Graphene-Based Sulfur Composites for Energy Storage and Conversion in Li-S Batteries

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Chinese Journal of Chemistry 2016年第1期34卷 13-31页

作者： Xingxing Gu shanqing zhang Yanglong Hou Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China Centre for Clean Environment and Energy Environmental Futures Insititute Griffith School of Environment Gold Coast Campus Griffith University QLD 4222 Australia

There are growing research interests in developing high-performance energy storage systems to meet the demands for large-scale and sustainable energy storage. The lithium-sulfur （Li-S） batteries have drawn numerous attentions due to their exceptionally high energy density compared with other batteries. However, achieving the high capacities with long-term cycle stability and retaining an essentially high sulfur loading remains a tremendous chal- lenge for the designs of Li-S batteries. Graphene is regarded as a very suitable and promising addition to the com- positions for Li-S batteries due to its unique two dimensional （2D） structure, high conductivity and superior me- chanical flexibility. Besides, the functional groups of graphene surface can be tuned flexibly to immobilize the S/Li2Sx on the graphene surface during the cycling process. In this review, the development of graphene-sulfur composites and their applications in Li-S batteries are discussed. The attempts are also devoted to the synthesis approaches of various graphene-based sulfur composites, the graphene-sulfur interaction and the impacts on the elec- trochemical performances as well as the major issues of Li-S batteries.

关键词： Li-S batteries graphene-sulfur composites polysulfides immobilization

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Hydrogenation of nanostructured semiconductors for energy conversion and storage

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Chinese Science Bulletin 2014年第18期59卷 2144-2161页

作者： Jingxia Qiu Jacob Dawood shanqing zhang Centre for Clean Environment and Energy Environmental Futures Research InstituteGold CoastQLD 4222Australia Griffith School of Environment Gold Coast CampusGriffith UniversityGold CoastQLD 4222Australia

Nanostructured semiconductors have been researched intensively for energy conversion and storage applications in recent *** of tremendous findings and achievements,the performance of the devices resulted from the nanomaterials in terms of energy conversion efficiency and storage capacity needs further improvement to become economically viable for subsequent *** is a simple,efficient,and cost-effective way for tailoring the electronic and morphological properties of the nanostructured *** work reviews a series of hydrogenated nanostructured materials was produced by the hydrogenation of a wide range of *** materials with improved inherent conductivity and changed characteristic lattice structure possess much enhanced performance for energy conversion application,e.g.,photoelectrocatalytic production of hydrogen,and energy storage applications,e.g.,lithium-ion batteries and *** hydrogenation mechanisms as well as resultant properties responsible for the efficiency improvement are explored in *** work provides guidance for researchers to use the hydrogenation technology to design functional materials.

关键词：能量转换效率纳米结构材料存储能力半导体氢化纳米材料加氢技术电子商务

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Sustainable engineering of TiO_(2)-based advanced oxidation technologies:From photocatalyst to application devices

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Journal of Materials Science & Technology 2021年第19期78卷 202-222页

作者： Meng Zu Xiaosong Zhou Shengsen zhang Shangshu Qian Dong-Sheng Li Xianhu Liu shanqing zhang College of Chemistry and Chemical Engineering Lingnan Normal UniversityZhanjiangGuangdong524048China Centre for Clean Environment and Energy and Griffith School of Environment Griffith UniversityGold CoastQLD4222Australia College of Materials and Energy South China Agricultural UniversityGuangzhou510643China College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges University.Yichang443002China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou450002China

In recent years,photocatalysis(PC)and photoelectrocatalysis(PEC)technologies have shown great promise as low-cost,environmentally friendly,and sustainable strategies in addressing the issues of energy shortages and environmental pollution,which has become a research *** dioxide(TiO_(2))-based PC and PEC are the most promising sustainable technologies for advanced oxidation *** to its inherent characteristics,including high oxidation ability,low price,and stability,TiO_(2)photocatalyst has been widely studied and used in different scales for numerous *** practical applications in these areas,the engineering of the photocatalysts and the design of the PC and PEC devices must be both environmentally and economically *** the one hand,for the engineering of the photocatalysts,the photocatalyst shall be able to deliver the following characteristics,including large specific surface area,high absorption of light,rapid and low-cost separation and regeneration,and high *** the other hand,the design of the PC and PEC devices shall facilitate high in energy utilization and catalytic efficiency,and low in building and operational *** work covers the reaction mechanism of TiO_(2)-based PC and PEC technologies,sustainable design,and preparation of TiO_(2)photocatalysts as well as sustainable design in PC and PEC devices for wastewater treatment,sensing,and water ***,we provide some critical perspectives on the future development of TiO_(2)-based PC and PEC technology.

关键词： Photocatalysis Photoelectrocatalysis TiO_(2) Bandgap Morphology engineering Sustainable design

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Functional lithiophilic polymer modified separator for dendrite-free and pulverization-free lithium metal batteries

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Journal of Energy Chemistry 2021年第1期30卷 262-268,I0009页

作者： Lingdi Shen Xin Liu Jing Dong Yuting zhang Chunxian Xu Chao Lai shanqing zhang School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhou 221116JiangsuChina Center for Clean Environment and energy School of Environment and ScienceGriffith UniversityQueensland 4222Australia

Severe performance drop and fire risk due to the uneven lithium(Li) dendrite formation and growth during charge/discharge process has been considered as the major obstacle to the practical application of Li metal *** inhibiting dendrite growth and producing a stable and robust solid electrolyte interface(SEI) layer are essential to enable the use of Li metal *** this work,a functional lithiophilic polymer composed of chitosan(CTS),polyethylene oxide(PEO),and poly(triethylene glycol dimethacrylate)(PTEGDMA),was homogeneously deposited on a commercial Celgard separator by combining electrospraying and polymer photopolymerization *** lithiophilic environment offered by the CTS-PEO-PTEGDMA layer enables uniform Li deposition and facilitates the formation of a robust homogeneous SEI layer,thus prevent the formation and growth of Li *** a result,both Li/Li symmetric cells and LiFePO4/Li full cells deliver significantly enhanced electrochemical performance and cycle *** after 1000 cycles,the specific capacity of the modified full cell could be maintained at65.8 mAh g^(-1), twice which of the unmodified cell(32.8 mAh g^(-1)).The long-term cycling stability in Li/Li symmetric cells,dendrite-free anodes in SEM images and XPS analysis suggest that the pulverization of the Li anode was effectively suppressed by the lithiophilic polymer layer.

关键词： Lithium metal batteries Functional separators Anode protection Solid electrolyte interface Long cycling life

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High-performance aqueous symmetric sodium-ion battery using NASICON-structured Na2VTi（PO4）3

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Nano Research 2018年第1期11卷 490-498页

作者： Hongbo wang Tianran zhang Chao Chen Min Ling Zhan Lin shanqing zhang Feng Pan Chengdu Liang Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China Department of Mechanical Engineering National University of Singapore Singapore 117576 Singapore College of Light Industry and Chemical Engineering Guangdong University of Technology 6uangzhou 510006 China Centre for Clean Environment and Energy Environmental Futures Research Institute and Griffith School of Environment Gold Coast Campus Gfiffith University QLD 4222 Australia School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055 China

A high-safety and low-cost route is important in the development of sodium-ion batteries, especially for large-scale stationary battery systems. An aqueous sodium-ion battery is demonstrated using a single NASICON-structured Na2VTi（PO4）3 material with the redox couples of V4＋/V3＋ and Ti4＋/Ti3＋ working on the cathode and anode, respectively. The symmetric full cell fabricated based on the bi-functional electrode material exhibits a well-defined voltage plateau at ~ 1.2 V and an impressive cycling stability with capacity retention of 70% exceeding 1,000 cycles at 10C （1C = 62 mA.g-1）. This study provides a feasible strategy for obtaining high-safety and low-cost rechargeable batteries using a single active material in aqueous media.

关键词： Na2VTi(PO4) 3 aqueous symmetric sodium-ion batteries

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A Holographic Diffraction Label Recognition Algorithm Based on Fusion Double Tensor Features

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Computer Systems Science & Engineering 2021年第9期38卷 291-303页

作者： Li Li Chen Cui Jianfeng Lu shanqing zhang Ching-Chun Chang Hangzhou Dianzi University Hangzhou310018China Zhejiang Police College Hangzhou310018China University of Warwick CoventryCV47ALUK

As an efficient technique for anti-counterfeiting,holographic diffraction labels has been widely applied to various *** to their unique feature,traditional image recognition algorithms are not ideal for the holographic diffraction label *** a tensor preserves the spatiotemporal features of an original sample in the process of feature extraction,in this paper we propose a new holographic diffraction label recognition algorithm that combines two tensor *** HSV(Hue Saturation Value)tensor and the HOG(Histogram of Oriented Gradient)tensor are used to represent the color information and gradient information of holographic diffraction label,***,the tensor decomposition is performed by high order singular value decomposition,and tensor decomposition matrices are *** into consideration of the different recognition capabilities of decomposition matrices,we design a decomposition matrix similarity fusion strategy using a typical correlation analysis algorithm and projection from similarity vectors of different decomposition matrices to the PCA(Principal Component Analysis)sub-space,then,the sub-space performs KNN(K-Nearest Neighbors)classification is *** effectiveness of our fusion strategy is verified by *** double tensor recognition algorithm complements the recognition capability of different tensors to produce better recognition performance for the holographic diffraction label system.

关键词： Label recognition holographic diffraction fusion double tensor matrix similarity

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Strategies for Sustainable Production of Hydrogen Peroxide via Oxygen Reduction Reaction:From Catalyst Design to Device Setup

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Nano-Micro Letters 2023年第8期15卷 225-269页

作者： Yuhui Tian Daijie Deng Li Xu Meng Li Hao Chen Zhenzhen Wu shanqing zhang School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006People’s Republic of China Centre for Catalysis and Clean Energy School of Environment and ScienceGriffith UniversityGold Coast CampusGold CoastQueensland 4222Australia Institute for Energy Research School of Chemistry and Chemical EngineeringKey Laboratory of ZhenjiangJiangsu UniversityZhenjiang 212013People’s Republic of China

An environmentally benign,sustainable,and cost-effective supply of H_(2)O_(2)as a rapidly expanding consumption raw material is highly desired for chemical industries,medical treatment,and household *** electrocatalytic production route via electrochemical oxygen reduction reaction(ORR)offers a sustainable avenue for the onsite production of H_(2)O_(2)from O2 and *** most crucial and innovative part of such technology lies in the availability of suitable electrocatalysts that promote two-electron(2e^(–))*** recent years,tremendous progress has been achieved in designing efficient,robust,and cost-effective catalyst materials,including noble metals and their alloys,metalfree carbon-based materials,single-atom catalysts,and molecular ***,innovative cell designs have significantly advanced electrochemical applications at the industrial *** review summarizes fundamental basics and recent advances in H_(2)O_(2)production via 2e^(–)-ORR,including catalyst design,mechanistic explorations,theoretical computations,experimental evaluations,and electrochemical cell *** on addressing remaining challenges are also presented with an emphasis on the large-scale synthesis of H_(2)O_(2)via the electrochemical route.

关键词： Hydrogen peroxide Electrochemical synthesis Electrocatalysts Sustainable technologies

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