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Deep learning-based end-to-end depth estimation from a single-frame fringe pattern with the FDSUNet++ network 认领 引用
1
作者 Xinjun ZHU Jialei ZHANG +2 位作者 Limei SONG Hongyi WANG Ruiqin TIAN 《Optoelectronics Letters》 EI 2026年第6期373-378,共6页
Recently the depth estimation methods based on deep learning(DL)retain challenging to estimate a high-precision depth map in fringe projection structured light three-dimensional(3D)measurement with limited information... Recently the depth estimation methods based on deep learning(DL)retain challenging to estimate a high-precision depth map in fringe projection structured light three-dimensional(3D)measurement with limited information from a single-frame fringe pattern.In this letter,we proposed a FDSUNet++convolutional neural network(CNN),which consists of a UNet++base model,an improved squeeze-andexcitation(ISE)block,a Fourier transform(FT)data preprocessing block,and a discrete wavelet transform(DWT)block.The proposed ISE block can improve the ability of feature extraction and the designed FT data preprocessing block preserves the key features of the fringe pattern by FT.The introduced DWT block reduces the complexity and training cost of the model.By integrating these three blocks into the UNet++,it can better achieve depth estimation.Experimental results from two structured light datasets demonstrate that the proposed FDSUNet++outperforms the state-of-the-art networks,achieving the best performance in both qualitative and quantitative evaluation. 展开更多
关键词 neural network cnn which single frame fringe pattern fdsunet unet depth estimation fringe projection discrete wavelet deep learning
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Generalized Dual s-Frames and Their Perturbations in S-Hilbert Spaces 认领 引用
2
作者 Fu Yanling Bai Xiaobei Tian Yu 《Journal of Mathematical Research with Applications》 CSCD 2026年第4期527-545,共19页
Soft Hilbert spaces(S-Hilbert spaces for short)play an important role in the field of mathematical modeling and decision-making,which has received widespread attention.This article addresses the dual soft frame(s-fram... Soft Hilbert spaces(S-Hilbert spaces for short)play an important role in the field of mathematical modeling and decision-making,which has received widespread attention.This article addresses the dual soft frame(s-frame for short)theory in S-Hilbert spaces.We introduce the notion of generalized dual s-frames(dual s-frames and approximately dual s-frames)in SHilbert spaces and our motivation is to seek their applications in decision-making.We prove that a pair of generalized dual s-frames may induce a pair of dual s-frames,and obtain that generalized dual s-frames have a preservation effect under the action of a pair of invertible operators.We propose a method for constructing more generalized dual s-frames from known ones,and find that the best generalized dual of an s-frame is the canonical dual.Finally,we investigate the perturbation-stability properties of generalized dual s-frames. 展开更多
关键词 soft Hilbert space dual soft frame generalized dual perturbation
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LPF-free Harmonic Current Control in Multi-synchronous Reference Frames for Dual Three-phase PMSMs 认领 引用
3
作者 Yulei Yang Qian Wang +1 位作者 Fangrui Wei Yichen Yu 《CES Transactions on Electrical Machines and Systems》 EI CSCD 2026年第2期216-227,共12页
Harmonic current regulation in multi-phase motor drives remains challenging under dynamic operating conditions due to non-sinusoidal back electromotive force(EMF)and inverter nonlinearities,which introduce dominant lo... Harmonic current regulation in multi-phase motor drives remains challenging under dynamic operating conditions due to non-sinusoidal back electromotive force(EMF)and inverter nonlinearities,which introduce dominant low-order harmonics.Multi-synchronous reference frame(MSRF)based methods are widely adopted for multi-frequency current regulation;however,conventional implementations typically rely on low-pass filters(LPFs)for harmonic decoupling,introducing detection delay and phase distortion that limit transient performance.This paper proposes an LPF-free MSRF-based harmonic current control method for dual three-phase permanent magnet synchronous motor(DTP-PMSM)drives.By introducing harmonic transformation matrix coefficients(HTMCs),the proposed method retains the independent regulation of multiple harmonic components within the MSRF framework,while eliminating the filtering step in the harmonic decoupling path,without the need for harmonic plane reconstruction or additional coordinate transformations.To support adaptive changes,a Goertzel-based harmonic amplitude extraction scheme is employed to periodically update the HTMC.Experimental results demonstrate that the proposed method significantly enhances dynamic performance,achieving a 19.3% reduction in speed transition stabilization time compared to other methods.The proposed LPF-free formulation provides a practical solution for MSRF-based harmonic current control in industrial motor drive applications where fast dynamic response is required. 展开更多
关键词 Low-pass filter(LPF)-free harmonic decoupling Multi-synchronous reference frame(MSRF) Multi-frequency current control Harmonic current suppression Industrial motor drives Dual three-phase permanent magnet synchronous motors(DTP-PMSMs)
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Video frame interpolation based on invertible neural network for Internet of things 认领 引用
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作者 Lingfan Wu Keyuan Ye +2 位作者 Huan Gao Huchen Jiang Hong Zhang 《Digital Communications and Networks》 SCIE EI CSCD 2026年第3期540-549,共10页
Video frame interpolation focuses on directly synthesizing intermediate frames by utilizing inter-frame changes,relying heavily on large,high-frame-rate video datasets for supervised training,which imposes significant... Video frame interpolation focuses on directly synthesizing intermediate frames by utilizing inter-frame changes,relying heavily on large,high-frame-rate video datasets for supervised training,which imposes significant demands on bandwidth and computational resources in the Internet of Everything(IoE)environments.Since video frame rate down and up conversion are inverse processes,an Invertible Neural Network(INN)provides an efficient solution by ensuring lossless and symmetrical information transfer in forward and backward processes.This paper introduces a self-supervised video frame rate conversion method based on an INN to reconstruct missing intermediate frames.By leveraging an invertible coupling structure,the model encodes the spatiotemporal features of sparse input frames into a Gaussian distribution,which effectively simulates the frame rate downsampling process.Through the network’s invertibility and lossless processing capabilities,the intermediate frames are then reconstructed through reverse inference.This approach captures missing information from a Gaussian prior,ensuring stability and realism in the generated frames.Extensive experiments on public video datasets show that the proposed method surpasses existing state-of-the-art algorithms in accuracy and efficiency,offering superior visual quality,faster processing speeds,and reduced model parameters,especially for highframe-rate recovery. 展开更多
关键词 Video frame interpolation Deep learning Invertible neural network
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A numerical study on the effect of lintel beams on the behavior of masonry-infilled steel frames with window openings and the formation of compressive struts 认领 引用
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作者 Reza Mazloum Ardakani Majid Mohammadi Mohammad Sadegh Birzhandi 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2026年第3期619-633,共15页
The present study aims to evaluate the effect of the lintel beam above the window opening in perforated infilled frames by the finite element modeling of a number of specimens with and without lintel beams,calibrated ... The present study aims to evaluate the effect of the lintel beam above the window opening in perforated infilled frames by the finite element modeling of a number of specimens with and without lintel beams,calibrated against four large-scale single-story single-bay steel moment-resisting frames that were constructed in Tasnimi and Mohebkhah(2011)’s study.Box sections were used as lintel beams,while roller supports were used in the specimens without a lintel beam.It was demonstrated that the absence of this component in the numerical modeling of infilled frames with window openings led to significant errors in estimating ultimate load and its corresponding displacement,which were higher in specimens with larger openings.It also resulted in considerable errors in predicting failure modes in the infills,which can cause changes in the principal stress field of the infills.Our results suggest that there is no need to have four compressive struts for the macromodeling of the infilled frames with central openings.The location of the lintel beam influenced the position of the struts,particularly in the samples with larger openings.The specifications of the compressive struts depend on the drift applied to the structure. 展开更多
关键词 perforated infilled frame nonlinear static analysis lintel beam openings failure modes
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Rapid Seismic Damage Quantification for Reinforced Concrete Frames using Minimal Strain Inputs and Neural Networks Trained via Pushover Analysis 认领 引用
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作者 Mohammadreza Vafaei Sophia C.Alih Abdirahman Abdulkadir 《Computer Modeling in Engineering & Sciences》 SCIE EI 2026年第3期509-537,共29页
Rapid quantification of seismic-induced damage immediately following an earthquake is critical for determining whether a structure is safe for continued occupation or requires evacuation.This study proposes a novel da... Rapid quantification of seismic-induced damage immediately following an earthquake is critical for determining whether a structure is safe for continued occupation or requires evacuation.This study proposes a novel damage identification method that utilizes limited strain data points,significantly reducing installation,maintenance,and data analysis costs compared to traditional distributed sensor networks.The approach integrates finite element(FE)modeling to generate capacity curves through pushover analysis,incorporates noise-augmented datasets for Artificial Neural Network(ANN)training,and classifies structural conditions into four damage levels:Operational(OP),Immediate Occupancy(IO),Life Safety(LS),and Collapse Prevention(CP).To evaluate the method’s accuracy and efficiency,it was applied to two reinforced concrete(RC)frames;a single-story frame tested experimentally under cyclic loading and a three-story frame analyzed under various lateral load patterns.Strain data from selected beam and column ends were used as ANN inputs,while the corresponding damage classes served as outputs.Confusion matrix results demonstrated high true positive rates(>85%for the single-story and>90%for the three-story frame),even with a reduced number of sensors.The model also exhibited strong robustness to White Gaussian Noise(SNR=2.5-5 dB)and generalized effectively to nonlinear time-history analyses under scaled ground motions(PGA=0.1-1.0 g).Feature selection using the MRMR and ANOVA algorithms further enhanced computational efficiency.Overall,the proposed ANN-based framework has strong potential for real-time structural health monitoring applications. 展开更多
关键词 Damage detection seismic structural health monitoring reinforced concrete frame neural networks strain data
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Shaking table test of a moment resisting reinforced concrete frame with restricted ductility 认领 引用
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作者 Mohammad Vasef Mohammad Sadegh Marefat +1 位作者 Abbas Ghalandarzadeh Peng Patrick Sun 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2026年第2期517-535,共19页
The concept of full ductility is commonly used to design reinforced concrete frames.This concept may not work well where strong earthquakes impose restricted ductility demands.Examples include structures governed by g... The concept of full ductility is commonly used to design reinforced concrete frames.This concept may not work well where strong earthquakes impose restricted ductility demands.Examples include structures governed by gravity loads or wind loads.In this study,shake table tests are conducted on a 3-story intermediate RC frame.The frame is gradually subjected to a sequence of nine excitation records varying from 0.10 g to 0.60 g.It is assumed that the intensities below 0.35 g are minor,between 0.40 g and 0.50 g are moderate,and 0.55 g and 0.60 g are large earthquakes.Results show that the frame remains elastic and experiences hair cracks under minor and moderate earthquakes.Under large earthquakes,the thickness,number,and depth of cracks are increased,and the maximum inter-story drift ratio of the frame does not exceed a relatively safe value of 1.57%.Damage distribution shows that cracks are not localized in a specific area at the end of members but are distributed along the spans of both beams and columns,while beam-column joints remain almost uncracked.The observations indicate a relatively satisfactory performance of the intermediate frame under the assumed large earthquake. 展开更多
关键词 intermediate reinforced concrete frame shake table test seismic design crack pattern minor moderate large earthquakes
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A Frame-Based Analysis of Exemplification in Applied Linguistics Research Articles 认领 引用
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作者 Yingliang Liu Caihong Li 《Chinese Journal of Applied Linguistics》 2026年第2期236-254,321,共19页
Exemplification is commonly used in academic writing to help readers understand the author’s intended meaning and to promote information exchange.Despite its importance in knowledge construction and communication,exe... Exemplification is commonly used in academic writing to help readers understand the author’s intended meaning and to promote information exchange.Despite its importance in knowledge construction and communication,exemplification has received limited scholarly attention.This study addressed this gap by examining exemplification in research articles in applied linguistics to provide an exemplification frame for the field.Applying Fillmore’s(1976)frame semantics as a theoretical foundation,a corpus of 80 research articles was compiled to analyze exemplification expressions.Our analysis revealed 13 exemplification markers that evoke five exemplificationrelated frames defined in FrameNet(i.e.,Increment,Instance,Specific_individual,Inclusion,and Exemplar),encompassing 22 frame elements.Based on the semantic overlap and importance of these elements,we constructed an exemplification frame featuring two core frame elements(Type and Instance)and two non-core frame elements(Initial_set and Instance_prop).This frame elucidates the rhetorical and cognitive functions of exemplification,offering a valuable conceptual tool to deepen our understanding of its heuristic role in academic discourse. 展开更多
关键词 exemplification frame semantics academic writing applied linguistics
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Nonlinear Vibration and Resonance Behavior of Semi-Rigid Steel Frames with Second-Order Effects 认领 引用
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作者 Dung Bao Trung Le Quoc AnhVu Hai Quang Nguyen 《Structural Durability & Health Monitoring》 EI 2026年第4期135-152,共18页
The vibration and resonance behavior of steel frame structures are significantly affected by connection flexibility and geometric nonlinearity.Conventional vibration analyses often assume fully rigid beam-column conne... The vibration and resonance behavior of steel frame structures are significantly affected by connection flexibility and geometric nonlinearity.Conventional vibration analyses often assume fully rigid beam-column connections and neglect second-order effects,which can lead to inaccurate predictions of natural frequencies and resonance conditions.This study proposes a finite element-based approach for the vibration analysis of planar steel frames with linear and nonlinear semi-rigid connections,explicitly incorporating geometric nonlinearity.Beam-column connections aremodeled using nonlinearmoment-rotation relationships,while elastic and geometric stiffnessmatrices,together with a consistentmassmatrix,are integrated into the governing dynamic equations.Thetime-history response is computed using the Newmark integration scheme.The proposed formulation is validated through benchmark examples and comparisons with published results and commercial finite element software.Numerical results reveal that the combined effects of semi-rigid connections and geometric nonlinearity significantly alter the effective structural stiffness,leading to noticeable variations in natural vibration frequencies.In particular,the fundamental frequency evolves during dynamic response,resulting in resonance shifting and time-dependent resonance behavior.These findings suggest that resonance in steel frames with semi-rigid connections should be regarded as a state-dependent phenomenon rather than a fixed structural property,with important implications for vibration assessment and resonance control in structural design. 展开更多
关键词 Semi-rigid connections steel frames second-order vibration resonance behavior finite element analysis
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MDGAN-DIFI: Multi-Object Tracking for USVs Based on Deep Iterative Frame Interpolation and Motion Deblurring Using GAN Model 认领 引用
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作者 Manh-Tuan Ha Nhu-Nghia Bui +1 位作者 Dinh-Quy Vu Thai-Viet Dang 《Computers, Materials & Continua》 SCIE EI 2026年第6期697-720,共24页
In the realm of unmanned surface vehicle(USV)operations,leveraging environmental factors to enhance situational awareness has garnered significant academic attention.Developing vision systems for USVs presents conside... In the realm of unmanned surface vehicle(USV)operations,leveraging environmental factors to enhance situational awareness has garnered significant academic attention.Developing vision systems for USVs presents considerable challenges,mainly due to variable observational conditions and angular vibrations caused by hydrodynamic forces.The paper proposed a novel MDGAN-DIFI network for end-to-end multi-object tracking(MOT),specifically designed for camera systems mounted on USVs.Beyond enhancing traditional MOT models,the proposed MDGAN-DIFI includes preprocessing modules designed to enhance the efficiency of processing input signal quality.Initially,a Deep Iterative Frame Interpolation(DIFI)module is used to stabilize frames in the spatiotemporal domain.Next,an enhanced generative adversarial network(GAN)model is applied to reduce motion blur affecting objects within the field of view.Finally,a YOLO-CSSA architecture combines dual infrared(IR)and RGB data streams to maintain consistent performance across diverse environmental conditions.By synthesizing intermediate frames and restoring blurred details,the framework seeks to stabilize object motion trajectories and recover distinctive appearance features prior to tracking.This approach directly tackles the main causes of tracking failure in maritime environments,such as motion discontinuities and visual degradation.Experimental results demonstrate that the proposed approach outperforms conventional methods in multi-object tracking on USVs,achieving a maximum accuracy(MOTA)of 47.0%and an IDF1 score of 50.1%under challenging operational conditions.Consequently,the proposed multi-object tracking network provides a more robust foundation for subsequent detection and data association processes. 展开更多
关键词 Multi-object tracking unmanned surface vehicles deep interactive frame interpolation motion blur generative adversarial networks(GAN)
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Separability criteria and entanglement witnesses from mutually unbiased equiangular tight frames 认领 引用
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作者 Alexey E Rastegin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2026年第2期35-43,共9页
Methods of quantum information processing often appear in terms of specially selected states.For example,mutually unbiased bases(MUBs)and symmetric informationally complete measurements are widely applied.Finite frame... Methods of quantum information processing often appear in terms of specially selected states.For example,mutually unbiased bases(MUBs)and symmetric informationally complete measurements are widely applied.Finite frames have found use in many areas including quantum information.Due to its specific inner structure,a single equiangular tight frame(ETF)allows one to formulate criteria to detect non-classical correlations.This study aims to approach entanglement detection with the use of mutually unbiased ETFs.Such frames are an interesting generalization of widely recognized MUBs.It still uses rank-one operators,but the number of outcomes can exceed the dimensionality.Several approaches are considered including separability criteria and entanglement witnesses.Separability criteria for multipartite systems are finally obtained. 展开更多
关键词 equiangular tight frames mutual unbiasedness separable states entanglement witnesses
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Experimental and Numerical Investigation of Steel Frame-UHPC Composite Deck for Construction Trestles 认领 引用
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作者 Wu Yang Quan Xu +2 位作者 Zhimin Zhou Mingtao Ye Shaohua He 《Structural Durability & Health Monitoring》 EI 2026年第4期246-263,共18页
Ultra-high performance concrete(UHPC)exhibits exceptional mechanical properties and durability,making it highly suitable for infrastructure applications.This paper presents the design and evaluation of an innovative s... Ultra-high performance concrete(UHPC)exhibits exceptional mechanical properties and durability,making it highly suitable for infrastructure applications.This paper presents the design and evaluation of an innovative steel frame-UHPC composite deck intended for temporary trestles subjected to heavy construction loads and corrosive environments.The mechanical performance of the proposed composite deck was investigated through advanced finite element modeling and full-scale experimental testing.Structural responses of the trestle structure equipped with the composite deck under a 150-t crawler crane were analyzed numerically,while a three-point bending test on a full-scale steel frame-UHPC composite deck determined its flexural capacity and failure mechanisms.Stress distribution and deformation under bending loads were examined using calibrated numerical models and experimental data.Moreover,a parametric study was performed to assess the influence of key design variables.Results indicate that the steel frame-UHPC composite deck achieved an ultimatemid-span bendingmoment of 271.6 kN·m.Crack propagation in the UHPC panel of the composite deck was characterized by multiple,progressive cracks,demonstrating favorable ductility and early-warning capacity of the deck system.These findings confirm that the steel frame-UHPC composite deck offers high load-bearing capacity,flexural ductility,and favorable durability,supporting its use in heavy-duty trestle bridges and corrosive environments. 展开更多
关键词 Trestle bridge composite deck steel frame UHPC panel mechanical performance
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Study on mechanism of wave passage effect on the response of frame structure 认领 引用
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作者 Li Wenbo Liu Tielin Wang Yu 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2026年第3期695-713,共19页
Frequency effect,in addition to time delay effect,on the response of the frame structure to sinusoidal and earthquake wave passage excitations is studied,respectively.The dynamic equilibrium equation in terms of the d... Frequency effect,in addition to time delay effect,on the response of the frame structure to sinusoidal and earthquake wave passage excitations is studied,respectively.The dynamic equilibrium equation in terms of the displacements of horizontal DOFs for a single-span,one-story plane frame structure subjected to wave passage excitation is formulated,and the relative motion method and mode superposition method are used to solve the dynamic equilibrium equation.The analytical and semi-analytical solutions of structural responses of the frame structure to sinusoidal and earthquake wave passage excitations are given,respectively.A new cognition is obtained that the wave passage effect includes not only time delay effect but also frequency effect.The frequency effect is also the mechanism of wave passage effect for the frame structure.When the excitation frequency is within a range from a frequency slightly bigger than zero to a certain frequency less than the structural fundamental frequency,the lower the excitation frequency,the more significant wave passage effect.Earthquake wave passage effect for the frame structure depends on the low-frequency content of earthquake wave besides time delay,and the more the low-frequency content,the more significant wave passage effect. 展开更多
关键词 wave passage effect frame structure analytical solution earthquake excitation frequency effect
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Diagnosing Organizational Bottlenecks in Student Software Projects with Extended Problem Frames 认领 引用
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作者 Zicheng Huang Hongbin Xiao Zhi Li 《计算机教育》 2026年第3期210-219,共10页
In educational settings,instructors often lead students through hands-on software projects,sometimes engaging two different schools or departments.How can such collaborations be made more efficient,and how can student... In educational settings,instructors often lead students through hands-on software projects,sometimes engaging two different schools or departments.How can such collaborations be made more efficient,and how can students truly experience the importance of teamwork and the impact of organizational structure on project complexity?To answer these questions,we introduce the requirement-driven organization structure(R-DOS)approach,which tightly couples software requirements with the actual development process.By extending problem-frames modeling and focusing on requirements,R-DOS allows educators and students to(1)diagnose structural flaws early,(2)prescribe role-level and communication fixes,and(3)observe-in real time-how poor structure can derail a project while good structure accelerates learning and delivery. 展开更多
关键词 Requirements engineering Organization structure Problem Frames
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The Framework Construction of the Belt and Road Initiative in Malaysian Chinese Media:A Case Study of Sin Chew Daily 认领 引用
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作者 SHAO Baohui LIANG Chenyue BA Ziyi 《Journalism and Mass Communication》 2026年第1期44-56,共13页
This study takes Malaysian Prime Minister Anwar Ibrahim’s visit to China in November 2024 as its starting point to examine how Malaysia’s largest Chinese-language newspaper,Sin Chew Daily,framed China’s Belt and Ro... This study takes Malaysian Prime Minister Anwar Ibrahim’s visit to China in November 2024 as its starting point to examine how Malaysia’s largest Chinese-language newspaper,Sin Chew Daily,framed China’s Belt and Road Initiative(BRI)in the 10 months following the visit.The trip coincided with the 50th anniversary of Malaysia-China diplomatic relations and marked Anwar’s second visit to China that year.Using a mixed-methods approach that combines quantitative content analysis(n=512 articles)with qualitative framing analysis,the study identifies how the newspaper constructed a predominantly positive and government-aligned narrative of the BRI within Malaysia’s multicultural media environment.Results show a strong emphasis on the economic cooperation frame(67.2%)and a consistently favorable reporting tone(76.6%),accompanied by a heavy reliance on government and elite sources(69.9%).Critical or risk-oriented frames were marginal(2.0%).Situated within theories of media framing and Asian media systems,the findings suggest that Sin Chew Daily’s coverage reflects both the commercial-economic interests of its Chinese-Malaysian readership and Malaysia’s broader political communication norms,which encourage alignment with state foreign policy.The study argues that the newspaper’s narrative construction reinforces a narrow range of perspectives on the BRI by privileging official discourses while marginalizing public voices and critical viewpoints.This contributes to understanding how ethnic-language media in Southeast Asia participate in nation-level foreign policy communication and how China-Malaysia media cooperation may shape reporting on cross-border initiatives.The article concludes by outlining implications for media pluralism and recommending comparative research across Malaysia’s multilingual press ecosystem. 展开更多
关键词 Belt and Road Initiative Sin Chew Daily framing analysis Chinese-language media Malaysia
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Construction Technology of Frame Shear Wall Structure in Building Engineering 认领 引用
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作者 LIU Chenchao 《外文科技期刊数据库（文摘版）工程技术》 2026年第1期032-037,共6页
In order to meet the requirements for the safety and stability of engineering structures under the trend of high-rise and multifunctional development in construction engineering, the construction of frame shear wall s... In order to meet the requirements for the safety and stability of engineering structures under the trend of high-rise and multifunctional development in construction engineering, the construction of frame shear wall structure engineering is taken as the key link. Combining construction specifications and engineering practice, this article systematically expounds the basic composition and stress characteristics of the structural system, and conducts in-depth technical analysis around key processes such as construction preparation, steel reinforcement construction, formwork construction, concrete construction, and internal partition wall construction. The technical points of each link are clearly pointed out, forming a complete technical framework for the construction of frame shear wall structure in construction engineering, strengthening the anti lateral displacement ability, space utilization rate, and seismic performance of the structure, and providing experience and technical support for similar projects. 展开更多
关键词 construction engineering Frame shear wall structure Reinforcement construction formwork construction
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Research on Load Transfer Law of Combined Reinforcement Using Anchor Cable Frames and Anti-slide Piles:Dynamic Analysis Based on Pile Soil Contact Stress 认领 引用
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作者 Jianghong Yu Zhongbo Wang Shangyi Zhao 《Journal of World Architecture》 2026年第3期1-8,共8页
From the perspective of dynamic analysis of pile-soil contact stress,this paper investigates the load transfer law of combined reinforcement using anchor cable frames and anti-slide piles.It encompasses the load trans... From the perspective of dynamic analysis of pile-soil contact stress,this paper investigates the load transfer law of combined reinforcement using anchor cable frames and anti-slide piles.It encompasses the load transfer mechanism of the combined reinforcement using anchor cables and anti-slide piles,collaborative design judgment.and long-term performance prediction.The aim is to provide a reference for subsequent collaborative design and its application,thereby ensuring the effectiveness of the combined reinforcement. 展开更多
关键词 Pile-soil contact stress Anchor cable frame Anti-slide pile Combined reinforcement Load transfer
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Buckling-Restrained Brace Arrangement in Regular RC Frames Based on Pushover Analysis 认领 引用
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作者 Feng Li 《Journal of World Architecture》 2026年第2期101-108,共8页
To improve the seismic performance of existing reinforced concrete(RC)frame structures with insufficient lateral resistance,this study investigates the influence of different buckling-restrained brace(BRB)arrangements... To improve the seismic performance of existing reinforced concrete(RC)frame structures with insufficient lateral resistance,this study investigates the influence of different buckling-restrained brace(BRB)arrangements on a typical five-story,4×4 bay regular RC frame.Based on the original benchmark model,four retrofit schemes were developed by considering two brace forms,namely single diagonal and chevron braces,and two planar locations,namely mid-bay and end-bay arrangements.Five numerical models,including one unstrengthened structure and four BRB-retrofitted structures,were established in SAP2000 V26 for nonlinear static pushover analysis.Geometric and material nonlinearities were incorporated to simulate the inelastic behavior of beams,columns,and BRBs.Pushover analyses were conducted under uniform and inverted triangular lateral load distributions to evaluate the global seismic performance of the structure.The results indicate that all retrofit schemes significantly enhanced the base shear capacity and deformation capacity of the original frame.Under the uniform load pattern,the maximum base shear capacities of the four strengthened models increased by 295%,148%,145%,and 148%,respectively,relative to the original structure.Under the inverted triangular load pattern,the corresponding increases were 232%,128%,124%,and 127%,respectively.Among the investigated configurations,the mid-bay single diagonal brace arrangement achieved the most effective improvement in lateral resistance and was identified as the optimal retrofit scheme.These findings demonstrate that mid-bay BRB placement is more effective than end-bay placement for enhancing the seismic performance of regular RC frame structures. 展开更多
关键词 Reinforced concrete frame Buckling-restrained brace Seismic retrofit Brace arrangement Pushover analysis Nonlinear static analysis
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Lightweight design and manufacture of die casting magnesium alloy seat frame 认领 引用 被引量：1
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作者 Jian Yang Kangle Wang +3 位作者 Qin Yang Jinsheng Zhang Tiegang Hu Bo Liu 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第10期4817-4824,共8页
This study presents the development of a Magnesium Alloy Seat Frame(MASF),supported by case studies from automotive original equipment manufacturers.The process covers integrated design,simulation,manufacturing,and te... This study presents the development of a Magnesium Alloy Seat Frame(MASF),supported by case studies from automotive original equipment manufacturers.The process covers integrated design,simulation,manufacturing,and testing,aiming to boost industry confidence in Mg alloy applications.A novel structural design is developed that integrates the headrest with the backrest,achieving a balance between lightweight performance and safety.Structural optimization is guided by stress–strain simulations under diverse conditions within a complete forward development process.Casting simulations are conducted to analyze process characteristics,resulting in a verified MASF yield rate exceeding 90%.The final 9.88 kg MASF represents a 24.6%(3.23 kg)weight reduction versus a steel seat.This research contributes to advancements in defect control technology for large die casting magnesium alloy parts and has broad implications for their application in automotive manufacturing. 展开更多
关键词 Magnesium Seat frame Forward design Die casting Lightweighting
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Seismic design of variable cross-section damped steel support frame for post equipment 认领 引用
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作者 Yang Zhenyu Ma Yuhong +2 位作者 Zhao Guifeng Feng Zhiwei Fu Mingyang 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2025年第1期155-167,共13页
High-voltage electrical post equipment is generally installed on steel supports,which amplifies the seismic inputs and degrades the seismic performance of equipment.This study proposed a variable cross-section damped ... High-voltage electrical post equipment is generally installed on steel supports,which amplifies the seismic inputs and degrades the seismic performance of equipment.This study proposed a variable cross-section damped steel support frame(VCDFS)with viscous dampers to reduce seismic responses of both tall and low-rise electrical equipment.The VCDFS contains a trapezoidal damper layer to generate rocking motions,enabling the diagonal viscous dampers to dissipate seismic inputs.A theoretical model of post equipment with VCDFS is established,and an optimal design procedure is proposed.The analysis shows that the remaining static stiffness ratio λk is the key parameter that determines the effectiveness of the VCDFS.The VCDFS reduces the average displacement and stress response of a post insulator by 39.4%and 44.6%,respectively,together with a significant decrease in the dynamic amplification factor.Therefore,it is recommended to use the VCDFS instead of the conventional latticed-steel frame in earthquake zones. 展开更多
关键词 electrical post equipment steel support frame passive control seismic performance upgrading
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