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2022 International Conference on Big data, IoT, and Cloud Computing, ICBICC 2022

作者： Chen, Yu Ma, Feng Huang, Hu Shun Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China

ISBN: (纸本)9781450399548

While consumer credit report is used as important reference for lending institutions to make lending decisions, personal credit score is regarded as the key tool to make decisions quickly and accurately. Problems arise in the utilization of traditional clustering algorithm to deal with credit risk problem, as a large number of redundant features may cause clusters to be distributed in a certain feature subspace of high-dimensional space, and the sparse high dimensional space makes the similarity of samples difficult to measure. In order to address the issues, this paper constructs a bank credit white list access system based on the grey clustering algorithm. This paper first lists all the factors that may affect personal credit, and makes a qualitative analysis one by one, and then screens these factors. When the characteristic variables of a new applicant are known, this discriminant function is used to predict whether the applicant is a good customer, and then decide whether to grant a loan to it. Combine multiple source data into a consistent data store by using data integration technology, and then store it as a data cube;Finally, data reduction and aggregation are used, redundant features are deleted, and data is compressed to obtain effective and usable data. In this paper, the accuracy of constructing bank credit white list based on grey clustering algorithm is 92.14%. The research results show that the model is effective. © 2022 ACM.

关键词： Clustering algorithms

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Dynamic Feature-Aware Visual Inertial Odometry in Dynamic Environments

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Procedia Computer Science 2024年 250卷 257-264页

作者： Zerong Su Xubin Lin Zhihao Xu Hongyi Qu Weinan Chen Xuefeng Zhou Guangdong Key Laboratory of Modern Control Technology Institute of Intelligent Manufacturing Guangdong Academy of Sciences Guangzhou 510075 China School of Electro-mechanical Engineering Guangdong University of Technology Guangzhou 510006 China

The majority of current Simultaneous Localization and Mapping (SLAM) systems operate under the assumption that the surroundings of an autonomous mobile robot are static. This assumption is impractical in dynamic urban office settings and undermines the effectiveness of current SLAM algorithms. We propose an enhanced visual-inertial odometry system that can accurately locate the mobile robot position in real-time in semi-dynamic environments while showing superior performance. To ensure real-time performance, the front end of the algorithm combines ORB features with optical flow matching. To address dynamic feature mismatches in temporarily stationary environments, we design an outlier elimination mechanism based on feature reprojection and Random Sample Consensus (RANSAC) principles. During the feature tracking process before calculating the current robot pose, outliers are processed and eliminated based on the small-scale motion assumption between frames, mitigating the impact of dynamic and temporarily stationary objects and thus enhancing the robustness of the algorithm. The effectiveness and accuracy of the algorithm are validated through quantitative comparisons with state-of-the-art algorithms on the EuRoC dataset.

关键词： SLAM Visual-inertial Dynamic environment Sensor fusion

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Spatial correlation-based characterization of acoustic emission signal-cloud in a granite sample by a cube clustering approach

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International Journal of Mining Science and technology 2021年第4期31卷 535-551页

作者： Dongjie Xue Zepeng Zhang Cheng Chen Jie Zhou Lan Lu Xiaotong Sun Yintong Liu School of Mechanics and Civil Engineering China University of Mining and Technology-BeijingBeijing 100083China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400030China State Key Laboratory of Coal Resource and Safe Mining China University of Mining and Technology-BeijingBeijing 100083China

To extract more in-depth information of acoustic emission(AE)signal-cloud in rock failure under triaxial compression,the spatial correlation of scattering AE events in a granite sample is effectively described by the cube-cluster ***,the complete connection of the fracture network is regarded as a critical ***,according to the Hoshen-Kopelman(HK)algorithm,the real-time estimation of fracture con-nection is effectively made and a dichotomy between cube size and pore fraction is suggested to solve such a challenge of the one-to-one match between complete connection and cluster ***,the 3D cube clusters are decomposed into orthogonal layer clusters,which are then transformed into the ellip-soid ***,the anisotropy evolution of fracture network could be visualized by three orthogonal ellipsoids and quantitatively described by aspect ***,the other three quantities of centroid axis length,porosity,and fracture angle are analyzed to evaluate the evolution of cube *** result shows the sample dilatancy is strongly correlated to four quantities of aspect ratio,centroid axis length,and porosity as well as fracture ***,the cube cluster model shows a potential pos-sibility to predict the evolution of fracture ***,the cube cluster model provides an in-depth view of spatial correlation to describe the AE signal-cloud.

关键词： Acoustic emission Triaxial compression Fracture connection Spatial correlation Cube cluster model Dilatancy

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Polydopamine-mediated phosphoric acid functionalized carbon nano-onions/sulfonated poly (aryl ether sulfone) composite membrane with enhanced proton transport capacity and chemical durability for fuel cell at low humidity

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International Journal of Hydrogen Energy 2025年 144卷 262-274页

作者： Lili Liu Yijia Tian Yujie Hu Zexin Wu Pei Yang Wei Yan Yuanyuan Zhang Zhaoxia Hu Shouwen Chen Linxing Shi Jiangsu Key Laboratory of Function Control Technology for Advanced Materials School of Science Jiangsu Ocean University Lianyungang 222005 China School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing 210094 China

In this work, phosphorylated carbon nano-onions (PD-CNOs), serving as a preeminent proton-conduction accelerator, are constructed by performing the phosphorylation on polydopamine (PDA) deposited CNOs. The optimized PD-CNOs are subsequently introduced into sulfonated poly (aryl ether sulfone) (SPAES) to obtain high-performance membranes. The characteristic nanosized PD-CNOs possess abundant functional groups, which confer the particles with good hydrophilicity and dispersivity. A series of flexible, tight, and homogeneous SPAES/PD-CNOs membranes are fabricated and evaluated for their microstructure, physicochemical-electrochemical properties and durability. The composite membranes exhibit improved mechanical properties, physicochemical stability, and proton conductivity due to better filler-matrix compatibility, stronger interfacial interactions and more consecutive proton transport pathways. Benefitting from the low zero-point energy, large hydration energy, and amphoteric character of -PO 3 H 2 groups, the low-energy-barrier channels and hydrogen-bonding water bridges could be readily built, which translates into fast proton hopping/diffusion at low relative humidity (RH). SPAES/PD-CNOs-1.5 exhibits excellent proton conductivities of 222 mS cm −1 (90 °C, hydrous state) and 75 mS cm −1 (80 °C, 65 % RH), approximately 1.5 times and 2.0 times than that of SPAES, respectively. The power output values of SPAES/PD-CNOs-1.5 in H 2 /O 2 fuel cells reach 760 mW cm −2 (80 °C, 100 % RH) and 550 mW cm −2 (80 °C, 60 % RH), surpassing those of SPAES (535 and 293 mW cm −2 ) and Nafion® 112 (722 and 501 mW cm −2 ); it also demonstrates high enough cell performance stability at 80 °C/60 % RH for 144 h. This work provides an effective proposal for the construction of composite membranes with outstanding proton conductivity and durability at low RH.

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Three-Dimensional Optimal Trajectory Tracking control of Underactuated Autonomous Underwater Vehicles Using Double Closed-Loop control 5

Three-Dimensional Optimal Trajectory Tracking Control of Und...

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5th International Conference on Intelligent Autonomous Systems, ICoIAS 2022

作者： Gong, Huibin Joo, Meng Liu, Tianhe Zhao, Xudong Institute of Artificial Intelligence and Marine Robotics College of Marine Electrical Engineering Dalian Maritime University Dalian China Dalian University of Technology Key Lab. of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian China

ISBN: (数字)9781665498388

ISBN: (纸本)9781665498388

In this paper, a double closed-loop control method is proposed for three-dimensional optimal trajectory tracking control of underactuated autonomous underwater vehicles (AUVs), Firstly, a five-degree-of-freedom mathematical model of under-Actuated AUV is established. Secondly, an output redefinition method is adopted to solve underactuated control problem. On this basis, a backstepping method is utilized to design the outer-loop controller where virtual velocity is derived using the error between input and output of the system. Next, an adaptive dynamic programming method is used to design the inner-loop controller, where the performance index function containing the disturbance upper bound is set, and a neural network is employed to solve the Hamilton-Jacobi-Bellman equation online. Finally, the Lyapunov theorem is used to establish that all signals of the closed-loop system are uniformly ultimately bounded. Simulation results demonstrate the effectiveness of the proposed method. © 2022 IEEE.

关键词： Autonomous underwater vehicles

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Composite Solutions of Phycocyanin and Chitosan for Prolonged Shelf Life of Oysters

SSRN

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SSRN 2025年

作者： Zeng, Mingyong Li, Yan Liu, Li Du, Youwei Yin, Zihao Zhao, Yue Feng, Guangxin College of Food Science and Engineering Ocean University of China Qingdao266003 China State Key Laboratory of Marine Food Processing & Safety Control Shandong Province Engineering Research Centre of Marine Food Preservation and Quality Control China College of Biosystems Engineering and Food Science Zhejiang University Hangzhou310058 China

Phycocyanin, a blue pigment with antioxidant and anti-inflammatory properties, was combined with 2.5% chitosan at varying concentrations to form stable composite solutions. SEM and XRD analyses confirmed structural compatibility, while viscosity and contact angle changes demonstrated effective encapsulation and barrier properties. FTIR, CD, zeta potential, and particle size analyses revealed that hydrogen bonding, hydrophobic interactions, and electrostatic forces stabilized the solution. Phycocyanin enhanced the hydrophobicity and antioxidant capacity, while chitosan exhibited broad-spectrum antibacterial activity against Pseudomonas aeruginosa, a major spoilage bacterium in oysters. Immersion in the composite solution extended oyster shelf life from 4 to 12 days, reducing bacterial growth, lipid oxidation, and maintaining protein integrity and sensory quality. This study offers a safe, environmentally friendly preservation strategy for oysters and other low-temperature aquatic products. © 2025, The Authors. All rights reserved.

关键词： Chitosan

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Research on an intelligent mining complete system of a fully mechanised mining face in thin coal seam

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Coal International 2024年第5期272卷 30-39页

作者： Ren, Bo Ding, Ke Wang, Lianguo Wang, Shuai Jiang, Chongyang Guo, Jiaxing State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and Technology Huainan232001 China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology Xuzhou221116 China

The mining environment of thin coal seam working faces is harsh, the labor intensity is high, and the production efficiency is low. Previous studies have shown that thin coal seam mining finds it difficult to follow machines, does not have complete sets of equipment, has a low degree of automation, and has difficult system co-control, which easily causes production safety accidents. To effectively solve the problems existing in thin coal seam mining, Binhu Coal Mine has established intelligent fully mechanised mining and actively explored automatic coal cutting, automatic support following, and intelligent control. The combination of an SAC electro-hydraulic control system and SAP pumping station control system has been applied in 16,108 intelligent fully mechanised coal mining faces, which realises the automatic following of underground support and the control of adjacent support, partition support, and group operation;the automatic coal cutting of the shearer is realised by editing the automatic coal-cutting state of the shearer and adjusting the automatic parameters. A centralised control center is set up, which realises the remote control and one-button start–stop of working face equipment. Through a comparative analysis of 16,108 intelligent fully mechanised mining faces and traditional fully mechanised mining faces, it is found that intelligent fully mechanised mining faces have obvious advantages in terms of equipment maintenance, equipment operation mode, and working face efficiency, which improve the equipment and technical mining level of thin coal seam. The application of intelligent mining in Binhu Coal Mine has a great and far-reaching impact on the development of thin coal seam mining technology in China. © 2024 Tradelink Publications Ltd.. All rights reserved.

关键词： Coal mines

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Addition Al and/or Ti Induced Modifi cations of Microstructures, Mechanical Properties, and Corrosion Properties in CoCrFeNi High-Entropy Alloy Coatings

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Acta Metallurgica Sinica(English Letters) 2021年第8期34卷 1087-1102页

作者： Guoliang Ma Yong Zhao Hongzhi Cui Xiaojie Song Mingliang Wang Kwangmin Lee Xiaohua Gao Qiang Song Canming Wang School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Solidifi cation Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China School of Materials Science and Engineering Chonnam National UniversityGwangju 61186Korea

The purpose of this work is to study the influences of Al and/or Ti addition on the microstructures, mechanical properties and corrosion properties of CoCrFeNi-(Al, Ti) high entropy alloy(HEA) coatings. Three coatings, AlCoCrFeNi(Ⅰ), CoCrFeNiTi_(0.5)(Ⅱ) and AlCoCrFeNiTi_(0.5)(Ⅲ), were fabricated by laser cladding successfully. The AlCoCrFeNi(Ⅰ) coating exhibited a simple body-centered cubic(BCC) solid-solution structure, whereas the CoCrFeNiTi_(0.5)(Ⅱ) alloy exhibited a face-centered cubic(FCC) solid-solution and a small amount of Laves phase. The BCC phases in AlCoCrFeNiTi _(0.5)(Ⅲ) coating were characterized as Fe–Cr rich disordered BCC phases(A2) and Al-Ni–Ti-rich ordered BCC phases(L2_1) separately. The AlCoCrFeNiTi_(0.5)(Ⅲ) coating with dual-phase BCC structure showed the optimal performance of both mechanical and corrosion properties, which was superior to BCC-based AlCoCrFeNi(Ⅰ) and FCC-based CoCrFeNiTi_(0.5)(Ⅱ) coatings. Nanoindentation tests and quantitative investigations on the strengthening mechanisms of AlCoCrFeNiTi_(0.5)(Ⅲ) coating were conducted, suggesting that the precipitation strengthening is the dominant strengthening mechanism. In short, the addition of moderate amount of Al and Ti in CoCrFeNi HEA shows potential for the development of a high strength and corrosion-resistant coating.

关键词： High entropy alloy Laser cladding Corrosion properties Mechanical properties

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Tectonic unit divisions based on block tectonics theory in the South China Sea and its adjacent areas

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Acta Oceanologica Sinica 2021年第9期40卷 33-42页

作者： Zhengxin Yin Zhourong Cai Cheng Zhang Xiaofeng Huang Qianru Huang Liang Chen South China Sea Marine Survey and Technology Center State Oceanic AdministrationGuangzhou 510275China School of Marine Sciences Sun Yat-sen UniversityZhuhai 519082China Southern Laboratory of Ocean Science and Engineering(Zhuhai) Zhuhai 519082China Key Laboratory of Marine Environmental Survey Technology and Application Ministry of Natural ResourcesGuangzhou 510275China

Identifying distinct tectonic units is key to understanding the geotectonic framework and distribution law of oil and gas *** South China Sea and its adjacent areas have undergone complex tectonic evolution processes,and the division of tectonic units is *** by block tectonics theory,this study divide the South China Sea and its adjacent areas into several distinguished tectonic units relying on known boundary markers such as sutures(ophiolite belts),subduction-collision zones,orogenic belts,and deep *** work suggests that the study area is occupied by nine stable blocks(West Burma Block,Sibumasu Block,LanpingSimao Block,Indochina Block,Yangtze Block,Cathaysian Block,Qiongnan Block,Nansha Block,and Northwest Sulu Block),two suture zones(Majiang suture zone and Southeast Yangtze suture zone),two accretionary zones(Sarawak-Sulu accretionary zone and East Sulawesi accretionary zone),one subduction-collision zone(RakhineJava-Timor subduction-collision zone),one ramp zone(Philippine islands ramp zone),and six small oceanic marginal sea basins(South China Sea Basin,Sulu Sea Basin,Sulawesi Sea Basin,Banda Sea Basin,Makassar Basin,and Andaman Sea Basin).This division reflects the tectonic activities,crustal structural properties,and evolutionary records of each evaluated tectonic *** is of great theoretical and practical importance to understand the tectonic framework to support the exploration of oil and gas resources in the South China Sea and its adjacent areas.

关键词： South China Sea block tectonics tectonic units suture zone

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Formation mechanism of electroless plating nickel-based composite coating on highly active rare earth magnesium alloys and its corrosion resistance and adhesion performance

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Journal of Central South University 2024年第10期31卷 3517-3531页

作者： WANG Bo LI Jia-wei XIE Zhi-hui LIU Kang XU Tao YU Gang College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410012China Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province China West Normal UniversityNanchong 637002China Central South University of Forestry and Technology Changsha 410004China

The process of preparing anodic oxide film containing active sites and electroless nickel plating on highly active rare earth magnesium alloy was *** formation mechanism of electroless nickel plating on active anodic oxide film and the structure and properties of the composite coating were studied by several surface and electrochemical *** results showed that Ag nanograins with an average size of 10 nm were embedded into the anodic oxide film with pores of 0.1−2μ*** nanoparticles provided a catalytic site for the deposition of Ni-B alloy,and the Ni crystal nucleus was first grown in horizontal mode and then in cylindrical *** corrosion potential of the composite coating increased by 1.37 V and the corrosion current reduced two orders of magnitude due to the subsequent deposition of Ni-P *** high corrosion resistance was attributed to the misaligning of these micro defects in the three different layers and the amorphous structure of the Ni-P alloy in the outer *** findings provide a new idea for electroless nickel plating on anodic oxide film.

关键词： rare earth magnesium alloy electroless nickel plating composite coating Ag+activation active anodic oxidation film growth mechanism

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