检索结果-南通市图书馆

Optimal CNN-based semantic segmentation model of cutting slope images

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2022年第4期16卷 414-433页

作者： Mansheng LIN shuai teng Gongfa CHEN Jianbing LV Zhongyu HAO School of Civil and Transportation Engineering Guangdong University of TechnologyGuangzhou 510006China JSTI Group Guangdong Inspection and Certification Co.Ltd Nanjing 210000China

This paper utilizes three popular semantic segmentation networks,specifically DeepLab v3+,fully convolutional network(FCN),and U-Net to qualitively analyze and identify the key components of cutting slope images in complex scenes and achieve rapid image-based slope *** elements of cutting slope images are divided into 7 *** order to determine the best algorithm for pixel level classification of cutting slope images,the networks are compared from three aspects:a)different neural networks,b)different feature extractors,and c)2 different optimization *** is found that DeepLab v3+with Resnet18 and Sgdm performs best,FCN 32s with Sgdm takes the second,and U-Net with Adam ranks *** paper also analyzes the segmentation strategies of the three networks in terms of feature map *** show that the contour generated by DeepLab v3+(combined with Resnet18 and Sgdm)is closest to the ground truth,while the resulting contour of U-Net(combined with Adam)is closest to the input images.

关键词： slope damage image recognition semantic segmentation feature map visualizations

Digital image correlation-based structural state detection through deep learning

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2022年第1期16卷 45-56页

作者： shuai teng Gongfa CHEN Shaodi WANG Jiqiao ZHANG Xiaoli SUN School of Civil and Transportation Engineering Guangdong University of TechnologyGuangzhou 510006China Earthquake Engineering Research&Test Center Guangzhou UniversityGuangzhou 510405China Guangzhou Municipal Engineering Testing Co. Ltd.Guangzhou 510520China

This paper presents a new approach for automatical classification of structural state through deep *** this work,a Convolutional Neural Network(CNN)was designed to fuse both the feature extraction and classification blocks into an intelligent and compact learning system and detect the structural state of a steel frame;the input was a series of vibration signals,and the output was a structural *** digital image correlation(DIC)technology was utilized to collect vibration information of an actual steel frame,and subsequently,the raw signals,without further pre-processing,were directly utilized as the CNN *** results show that CNN can achieve 99%classification accuracy for the research ***,compared with the backpropagation neural network(BPNN),the CNN had an accuracy similar to that of the BPNN,but it only consumes 19%of the training *** outputs of the convolution and pooling layers were visually displayed and discussed as *** is demonstrated that:1)the CNN can extract the structural state information from the vibration signals and classify them;2)the detection and computational performance of the CNN for the incomplete data are better than that of the BPNN;3)the CNN has better anti-noise ability.

关键词： structural state detection deep learning digital image correlation vibration signal steel frame

Design of bionic goat quadruped robot mechanism and walking gait planning

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2020年第5期13卷 32-39页

作者： Fu Zhang shuai teng Yafei Wang Zhijun Guo Jiajia Wang Ruiliang Xu College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471003HenanChina Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationJiangsu UniversityZhenjiang 212013JiangsuChina Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province Luoyang 471003HenanChina College of Vehicle&Transportation Engineering Henan University of Science and TechnologyLuoyang 471003HenanChina

In order to improve the walking stability and obstacle jumping ability of the robot on the slope,the goat was taken as the bionic prototype,a kind of bionic goat quadruped robot has been *** the bionic principle,the mechanical structure of the quadruped robot was designed,and the Denavit-Hartenberg(D-H)method was used to build the kinematic model,through which the forward and inverse kinematics of the robot was calculated,thus the equations of velocity and acceleration of the joint angle change were obtained during the quadruped robot motion,providing control theory foundation for *** walk gait planning,a low contact compact foot trajectory planning method using a high order polynomial curve was used to carry out the foot trajectory planning of the robot for the swing phase and stance *** MATLAB software simulation,the simulation results of MATLAB software showed that the trajectory of the foot of the quadruped robot was semi-elliptic in a gait cycle,which were basically consistent with the foot trajectory obtained from the previous goat slope walking ***,the simulation results by MATLAB software showed that the foot trajectory was *** on this,a gait plan was carried out,and the sequence of the lift leg steps of the robot was *** test platform for the whole machine was *** results showed that the height of the leg of the quadruped robot was 7.37 cm,and the length of the gait was 28.40 *** with the planned average gait length S=30 cm and average step height H=7 cm,the error of the leg height and the gait length was 5.28%and 5.33%,*** designed gait planning achieved the expected *** knee joint angle varied from 126.3°to 156.1°,and the hip joint angle varied from 103.9°to 138.4°.The changes in the joint angle of the quadruped robot could prove the correctness of the foot motion trajectory planning,which will provide a theoretical basis for the structural design and gait plan

关键词： bionic goat quadruped robot mechanism design gait plan D-H method foot trajectory

Model construction for field operation machinery selection and configuration in wheat-maize double cropping system

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2021年第4期14卷 82-89页

作者： Fu Zhang Tianhua Chen shuai teng Jiajia Wang Ruiliang Xu Zhijun Guo College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471003HenanChina Key Laboratory of Modern Agricultural Equipment and Technology Jiangsu UniversityMinistry of EducationZhenjiang 212013JiangsuChina Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province Luoyang 471003HenanChina College of Vehicle&Transportation Engineering Henan University of Science and TechnologyLuoyang 471003HenanChina

In order to scientifically and reasonably select the field operation machinery in the wheat-maize double cropping system,first,the selection evaluation index system was constructed through the existing national standards and industry *** the selection evaluation model was established based on the improved fuzzy comprehensive evaluation *** the method of subjective weight and objective weight was used to overcome the drawbacks of the previous single weighting method that could not take into account the subject and object information of each indicator,and the weight value of each index was obtained in the evaluation ***,the tillage process was used as an example,the field experiment was carried out to obtain the evaluation index value,and the model of selection evaluation was *** selection results of moldboard plough and rotary cultivator were as follows:the order of the comprehensive evaluation results of the moldboard plough results was ranked from high to low as 1LFK-435(IIM),1LFK-535(IM),1LF-342(IIIM),1LFT-445(IVM),1LFT-545(VM),and the best machine type of the moldboard plough was IIM;the order of the comprehensive evaluation results of the rotary cultivator was ranked from high to low as 1GQKGN-240(IIIR),1GKNSM-250(IVR),1GKN-230K(IR),1GKN-250K(IIR),1GQKGN-220(VR),and the optimal model of the rotary cultivator was *** experimental results showed that the results obtained by the evaluation model were in agreement with the local actual *** evaluation model will provide a scientific method for the selection of wheat and maize double cropping field operation machinery.

关键词： wheat-maize double cropping system agricultural machinery parts selection mode evaluation system fuzzy comprehensive evaluation method combination weight

Development of agricultural bionic four-legged robot:Effect of head movement adjustment on the stability of goats

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2019年第4期12卷 10-15页

作者： Fu Zhang Yafei Wang shuai teng Limin Zheng Jiajia Wang Zijun Chen College of Equipment Agricultural Engineering Henan University of Science and TechnologyLuoyang471003China Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province Luoyang 471003China Henan International Joint Laboratory of Intelligent Agricultural Equipment Technology Luoyang 471003China

The four-legged bionic robot for agriculture has been one of the hotspots in the field of *** farmland environment is complex,and the balance requirement of quadruped bionic robot is ***,head adjustment is a key factor affecting the balance of quadruped *** on this,this study takes the four-legged animal goat as an example to investigate the effect of goat head movement adjustment on the balance of *** this study,the head and neck of goats were simplified to a two-link *** kinematics model was established by D-H *** software was used to solve *** software was used to draw the movement track of the center of mass of the *** center of mass movement of the head is a quarter ***,the goat walking experiments were carried out on the different slopes(0°,5°,10°,15°,20°,25°,30°,35°and 40°).MATLAB software was used to fit the movement data of goat *** movement of the center of mass of the goat's head corresponds to Fourier *** result is:the determination coefficient is 0.8629,and the mean variance is *** the slope gradient gradually increases,the volatility gradually increases and is *** results of this study verify the rationality of the four-legged bionic mechanism under various parameters and reveal the mechanism of goat walking with an appendage at the head.

关键词： bionic four-legged robot slope head center of mass trajectory balance

Synergistically tuning the graphitic degree,porosity,and the configuration of active sites for highly active bifunctional catalysts and Zn-air batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第9期15卷 7959-7967页

作者： Yang Gao Debin Kong Fengli Cao shuai teng Tao Liang Bin Luo Bin Wang Quan-Hong Yang Linjie Zhi CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China College of New Energy Research Center for Advanced Chemical Engineering and Energy MaterialsChina University of Petroleum(East China)Qingdao 266580China Nanomaterials Centre Australian Institute for Bioengineering and Nanotechnology and School of Chemical EngineeringThe University of QueenslandBrisbaneQLD 4072Australia University of Chinese Academy of Sciences Beijing 100049China

Rational design and tailoring of the structural features of Co-N-C catalysts are urgently required to construct highly efficient bifunctional non-noble metal electrocatalysts for both oxygen evolution reaction(OER)and oxygen reduction reaction(ORR).Herein,we report a series of carbon-based catalysts with varied structural features,specifically the graphitic degree of carbon,porosity,and the configuration of active sites,and their effects on bifunctional oxygen electrocatalytic *** the synergistic tuning of these structural factors,the well-tailored Co-N-C catalyst exhibits a high bifunctional electrocatalytic activity,as revealed by a half-wave potential of 0.84 V for ORR and a low overpotential of 420 mV at 10 mA·cm^(−2)for *** impressively,the Zn-air battery using the optimum catalyst delivers excellent performance including a peak power density of 125.2 mW·cm_(−2)and a specific capacity of 790.8 mAh·gZn^(−1),as well as stable cycling durability,outperforming the noble metalsbased *** first-principles calculations reveal that the interlayer interaction between the pyridinic N-doped graphene and the confined Co nanoparticles increases the electronic states of the active C atoms near the Fermi level,thus enhancing the adsorption of the HOO*intermediate and generating superior catalytic activity for bifunctional oxygen *** comprehensively studying the structural factors of catalysts,the bifunctional catalytic behaviors,the use in a practical Zn-air device,and theoretical simulations,this work may also give inspirations to the design,use,and understanding of other kinds of catalysts.

关键词： electrocatalysis bifunctional Co-N-C ZIFs Zn-air battery

Differentially Private Support Vector Machines with Knowledge Aggregation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第3期78卷 3891-3907页

作者： teng Wang Yao Zhang Jiangguo Liang shuai Wang Shuanggen Liu School of Cyberspace Security Xi’an University of Posts and TelecommunicationsXi’an710121China

With the widespread data collection and processing,privacy-preserving machine learning has become increasingly important in addressing privacy risks related to *** vector machine(SVM)is one of the most elementary learning models of machine *** issues surrounding SVM classifier training have attracted increasing *** this paper,we investigate Differential Privacy-compliant Federated Machine Learning with Dimensionality Reduction,called FedDPDR-DPML,which greatly improves data utility while providing strong privacy *** in distributed learning scenarios,multiple participants usually hold unbalanced or small amounts of ***,FedDPDR-DPML enables multiple participants to collaboratively learn a global model based on weighted model averaging and knowledge aggregation and then the server distributes the global model to each participant to improve local data *** at high-dimensional data,we adopt differential privacy in both the principal component analysis(PCA)-based dimensionality reduction phase and SVM classifiers training phase,which improves model accuracy while achieving strict differential privacy ***,we train Differential privacy(DP)-compliant SVM classifiers by adding noise to the objective function itself,thus leading to better data *** experiments on three high-dimensional datasets demonstrate that FedDPDR-DPML can achieve high accuracy while ensuring strong privacy protection.

关键词： Differential privacy support vector machine knowledge aggregation data utility

Glycyrrhizic Acid Attenuates Balloon-Induced Vascular Injury Through Inactivation of RAGE Signaling Pathways

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cardiovascular Innovations and Applications 2020年第2期4卷 239-249页

作者： Zhaowei Zhu Yanan Guo Xuping Li shuai teng Xiaofan Peng Pu Zou Shenghua Zhou Department of Cardiovascular Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunanChina

Percutaneous coronary intervention is a well-established technique used to treat coronary artery disease,but the risk of coronary artery in-stent restenosis following percutaneous coronary intervention is still *** studies revealed that high mobility group protein B1(HMGB1)plays a critical role in neointima *** this study,we aimed to investigate the role of glycyrrhizic acid(GA),an HMGB1 inhibitor,in the process of neointima formation and the potential *** investigated the role of GA in neointima formation through an iliac artery balloon injury model in ***,migration,and phenotype transformation of human vascular smooth muscle cells(VSMCs)were ***,infl ammation and receptor for advanced glycosylation end products(RAGE)signaling pathways were *** results indicate that GA attenuated neointima formation and downregulated HMGB1 expression in injured artery in ***1 promoted proliferation,migration,and phenotype transformation through the activation of RAGE signaling pathways in VSMCs,and blockade of HMGB1 by GA(1,10,and 100μM)could attenuate those processes and reduce proliferation of human *** conclusion,the HMGB1 inhibitor GA might be useful to treat proliferative vascular diseases by downregulating RAGE signaling *** results indicate a new and promising therapeutic agent for restenosis.

关键词： Glycyrrhizic acid high mobility group protein B1 infl ammation vascular smooth muscle cell receptor for advanced glycosylation end products

Single-atom catalysis for advanced oxidation and reduction systems in water decontamination

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第8期43卷 3576-3606页

作者： Jie teng Jin-Hui Xu Wen-Xin Sun Xue-Feng Liu Xia Xu Guo-shuai Liu School of Urban Construction Changzhou UniversityChangzhou 213164China School of Environmental and Civil Engineering Jiangnan UniversityWuxi 214122China

Water scarcity is an escalating global crisis,posing a severe threat to populations ***,exploring various materials to remove emerging contaminants from freshwater sources has garnered significant *** this regard,single-atom catalysis(SACs) has emerged as a catalyst of scientific progress in water purification and treatment methodologies during recent *** exhibit exceptional catalytic activity,selectivity and stability,due to their near-perfect atom utilization,highly unsaturated coordination environment and uniform reaction ***,a comprehensive and critical review encompassing the successful integration of SACs into water purification processes needs to be *** review aims to accentuate recent trends by presenting the synthesis,structure,and environment and energy application-relevant properties of *** results show that a comprehensive and multi-perspective summary of the advantages of SACs in environmental remediation can have significant benefits,such as fast kinetics,costeffectiveness,*** oxidation and reduction processes of SACs and functional SACs materials in water purification were ***,the last section is devoted to the current research gaps and further perspectives on the application of SACs in water treatment,which are summarized and analyzed.

关键词： Single-atom catalysis Water treatment Oxidation Reduction