Computers & Structures最新文献_第8页

Large-scale simulation of discrete dislocation dynamics based on dynamic heterogeneous parallel fast multipole method 基于动态非均质平行快速多极法的离散位错动力学大尺度模拟

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-15 DOI: 10.1016/j.compstruc.2025.107887

Kang Zou , Genshen Chu , Dandan Chen

{"title":"Large-scale simulation of discrete dislocation dynamics based on dynamic heterogeneous parallel fast multipole method","authors":"Kang Zou , Genshen Chu , Dandan Chen","doi":"10.1016/j.compstruc.2025.107887","DOIUrl":"10.1016/j.compstruc.2025.107887","url":null,"abstract":"<div><div>Discrete dislocation dynamics (DDD) studies the plastic deformation of structural materials by directly simulating the collective evolution of a large number of dislocations, revealing the intrinsic physical correlation between material microstructure, dislocation microstructure, and plastic mechanical behavior. This paper proposes PFM-DDD, a novel parallel computation framework designed to combine DDD with fast multipole method (FMM) for simulating plastic deformation with over millions of degrees of freedom. PFM-DDD achieves large-scale fast simulation through three synergistic modules: (1) custom data structures linking FMM with DDD for efficient storage and retrieval of dislocation segments and FMM cells; (2) adaptive task partitioning to mitigate load imbalance issues in parallel simulations; (3) two-stage FMM heterogeneous parallel DDD design, including subdomain-level parallel FMM on CPUs and GPU-accelerated strategies. Experimental results demonstrate that PFM-DDD has good accuracy and exhibits superior computational performance compared to the state-of-the-art DDD simulation program ParaDiS.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107887"},"PeriodicalIF":4.4,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Neumann expansion-based sequential simulation method for structural interval finite element analysis 基于Neumann展开的结构区间有限元序列模拟方法

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-15 DOI: 10.1016/j.compstruc.2025.107892

Bingyu Ni , Zanyu Chen , Wanyi Tian , Chao Jiang

{"title":"A Neumann expansion-based sequential simulation method for structural interval finite element analysis","authors":"Bingyu Ni , Zanyu Chen , Wanyi Tian , Chao Jiang","doi":"10.1016/j.compstruc.2025.107892","DOIUrl":"10.1016/j.compstruc.2025.107892","url":null,"abstract":"<div><div>The interval finite element method, which cooperates finite elements with interval analysis, aims to determine the structural upper and lower response bounds under interval inputs. The sequential simulation method provides an efficient strategy for evaluating the structural response bounds, which performs sampling of interval variables and structural response simulations sequence by sequence. However, the structural response analyses in each simulation sequence are accurately solved, even though most of them are not contributing components to the final response bound. It is realized that structural response computations for the earlier sequences are mainly used to identify the contributing samples, focusing on assessing the relative magnitude of their values rather than obtaining their exact values. Therefore, the Neumann expansion is introduced in this paper to approximate the structural response and to identify potential contributing samples. In each simulation sequence, accurate numerical solutions of the structural response are performed only for the potential contributing samples. In addition, this study proposes an adaptive sampling strategy that accelerates the convergence by continuously adjusting the sampling neighborhood of the contributing sample. Several numerical examples are investigated to illustrate the efficiency and accuracy of the proposed Neumann expansion-based sequential simulation method.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107892"},"PeriodicalIF":4.4,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Topology optimization method for stiffener layout design of curved thin-walled structures under random excitations 随机激励下弯曲薄壁结构加劲肋布置的拓扑优化方法

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-14 DOI: 10.1016/j.compstruc.2025.107882

Haotian Yang , Renjing Gao , Shutian Liu

{"title":"Topology optimization method for stiffener layout design of curved thin-walled structures under random excitations","authors":"Haotian Yang , Renjing Gao , Shutian Liu","doi":"10.1016/j.compstruc.2025.107882","DOIUrl":"10.1016/j.compstruc.2025.107882","url":null,"abstract":"<div><div>Traditional topology optimization methods for curved thin-walled stiffened structures predominantly focus on static load conditions, neglecting the critical influence of random excitations. This paper presents a topology optimization method for stiffener layout design of curved thin-walled structures under random excitations. This method takes the root-mean-square value of von Mises stress as the optimization objective, and ensures the structural safety margin under the random excitation by optimizing the stiffener layout. For the random dynamic response, the pseudo excitation method is utilized to calculate the response values. For the topological design, the coordinates of the endpoints of stiffeners are considered as the positional design variables to find the optimal layout, and the relative thicknesses of stiffeners are considered as the topological design variables to realize the material increase or decrease. In order to solve the local modal problem caused by variations in stiffener thickness, a penalty mechanism based on the Heaviside function is constructed to penalize the stiffener relative thickness and material density. In addition, an adaptive mesh discretization strategy is proposed to seamlessly couple the base panel and stiffener elements. Numerical examples demonstrate that the topology configurations obtained by the proposed method exhibit a lower random dynamic response compared with the equivalent static topology designs.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107882"},"PeriodicalIF":4.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new strategy using the Proper Generalized Decomposition to model time evolving spatial domains 一种利用适当广义分解对时间演化空间域进行建模的新策略

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-11 DOI: 10.1016/j.compstruc.2025.107860

Max Beckermann , Ronan Scanff , Massimiliano Cremonesi , Andrea Barbarulo

{"title":"A new strategy using the Proper Generalized Decomposition to model time evolving spatial domains","authors":"Max Beckermann , Ronan Scanff , Massimiliano Cremonesi , Andrea Barbarulo","doi":"10.1016/j.compstruc.2025.107860","DOIUrl":"10.1016/j.compstruc.2025.107860","url":null,"abstract":"<div><div>In this paper, we propose a new approach to adapt the Proper Generalized Decomposition (PGD) to problems containing space domains that are evolving over time. PGD shines with high-order parametrized and nonlinear problems, drastically reducing their computational time. It was proven highly effective in a wide range of problems, but the space domain has always remained fixed within the parametric manifold of interest. In this work, we adapt the PGD to non-constant domains that change over time at given discrete time instances. More specifically, we focus on time evolving space domains and separate the solution along space and time. The space modes are calculated in an expanded space that comprises all the degrees of freedom throughout the simulation. To visualize the solution, the modes are then projected onto the current physical representation. The time modes are solved in a piecewise manner, dividing the time domain into intervals and initializing the time modes to zero at the beginning of each interval. This work is illustrated with an additive manufacturing-inspired example in which the hot boundary elements are sequentially activated to simulate the addition of material. This aligns perfectly with the previously described strategy as it involves an expanding boundary. The impact of the mesh division and the initialization of the new points is discussed.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107860"},"PeriodicalIF":4.4,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Finite strain self-consistent clustering analysis under multiplicative kinematics 乘运动学下的有限应变自一致聚类分析

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-10 DOI: 10.1016/j.compstruc.2025.107886

Bernardo P. Ferreira , R.P. Cardoso Coelho , F.M. Andrade Pires , M.A. Bessa

{"title":"Finite strain self-consistent clustering analysis under multiplicative kinematics","authors":"Bernardo P. Ferreira , R.P. Cardoso Coelho , F.M. Andrade Pires , M.A. Bessa","doi":"10.1016/j.compstruc.2025.107886","DOIUrl":"10.1016/j.compstruc.2025.107886","url":null,"abstract":"<div><div>In this paper we propose a new finite strain extension of the Self-consistent Clustering Analysis method compatible with multiplicative kinematics. This formulation demands the adoption of the total deformation gradient as the primary unknown and a proper multiplicative decomposition-based strain loading incrementation. A logarithmic-based strain concentration tensor and a highly efficient Fast Fourier Transform-based solution approach are proposed to accelerate the method’s offline-stage. Akin to the infinitesimal strain setting, a new self-consistent scheme is devised to automatically find the reference material properties that play a fundamental role in the solution of the clustered Lippmann–Schwinger integral equilibrium equation. Despite some limitations tied to such a self-consistent scheme, the method is shown to deliver a remarkable balance between accuracy and efficiency in the homogenization of elastoplastic heterogeneous materials under several finite strain loadings. All the essential ingredients required for a successful computational implementation are provided and the method is made available by means of the open-source software CRATE.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107886"},"PeriodicalIF":4.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neural network-based prediction of stability coefficients for pultruded Fiber-Reinforced Polymer columns 基于神经网络的拉挤纤维增强聚合物柱稳定性系数预测

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-08 DOI: 10.1016/j.compstruc.2025.107888

Hengming Zhang , Feng Li , Lu Chen

{"title":"Neural network-based prediction of stability coefficients for pultruded Fiber-Reinforced Polymer columns","authors":"Hengming Zhang , Feng Li , Lu Chen","doi":"10.1016/j.compstruc.2025.107888","DOIUrl":"10.1016/j.compstruc.2025.107888","url":null,"abstract":"<div><div>Pultruded fiber-reinforced polymer (FRP) columns are widely used in infrastructure due to their excellent mechanical properties. However, their anisotropic properties and low transverse stiffness pose significant challenges for accurate stability coefficient prediction. Traditional theories, such as Euler’s and Perry’s formulas, rely on idealized assumptions that neglect material heterogeneity and initial imperfections, leading to inconsistent results. While artificial neural network (ANN) offers improved accuracy, their “black-box” nature limits engineering applicability. To address these limitations, this study proposes a novel single-layer ANN-based explicit solution for predicting stability coefficients of FRP columns. A database of 348 samples was constructed to establish the model. By simplifying the ANN architecture and extracting weight coefficients, an explicit formula (ANN formula) was derived. Comparisons with traditional methods demonstrated the ANN formula’s superior performance, achieving R<sup>2</sup> values of 0.937, outperforming Euler’s (R<sup>2</sup> = 0.753) and Perry’s (R<sup>2</sup> = 0.862) formulas. The MLP model exhibited exceptional accuracy (R<sup>2</sup> = 0.971). The proposed explicit solution uniquely bridges data-driven precision and engineering transparency, eliminating reliance on restrictive theoretical assumptions. This work advances FRP design by providing a mechanics-guided, interpretable tool for stability prediction, enabling safer and more efficient structural optimization. The methodology also establishes a framework for integrating machine learning into engineering standards for complex composite systems.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107888"},"PeriodicalIF":4.4,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing buckling resistance in topology optimization under pressure loading using a mixed formulation 利用混合配方提高压力载荷下拓扑优化的抗屈曲能力

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-05 DOI: 10.1016/j.compstruc.2025.107884

Tao Xu , Xiaodong Huang , Qingdi Wang , Xiaoshan Lin , Ngoc San Ha , Min Zhao , Yi Min Xie

{"title":"Enhancing buckling resistance in topology optimization under pressure loading using a mixed formulation","authors":"Tao Xu , Xiaodong Huang , Qingdi Wang , Xiaoshan Lin , Ngoc San Ha , Min Zhao , Yi Min Xie","doi":"10.1016/j.compstruc.2025.107884","DOIUrl":"10.1016/j.compstruc.2025.107884","url":null,"abstract":"<div><div>Buckling resistance is a critical consideration in structural designs for ocean and aerospace engineering. This study proposes an algorithm for enhancing buckling resistance in topology optimization of structures subjected to pressure loading, using a mixed formulation approach. The proposed algorithm integrates incompressible fluid, elastic solid, and air phases into the mixed formulation by introducing a phase parameter field derived from design variables, enabling an effective distinction of the fluid phase from the other phases. Buckling analysis within the mixed formulation presents distinct challenges due to the design-dependent pressure loading and the integration of different phases in finite element analysis. This study establishes a comprehensive computational framework for buckling analysis within the mixed formulation. A stress relaxation function is employed to eliminate pseudo buckling modes, and the accuracy of the buckling analysis is verified through comparative studies. A linear material model is adopted to simplify the allocation of material properties across different phases. Since 0/1 designs cannot be directly obtained using a linear material model, the floating projection topology optimization method is used. This method applies implicit floating projection constraints to design variables to drive intermediate density elements toward binary states, thereby ensuring smooth 0/1 material distributions. The effectiveness of the proposed approach is validated through four numerical examples, demonstrating that the algorithm achieves compliance minimization while precisely satisfying buckling constraints with stable convergence.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107884"},"PeriodicalIF":4.4,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy absorption optimization of parametric plate lattices 参数化板格的能量吸收优化

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-05 DOI: 10.1016/j.compstruc.2025.107880

Bingteng Sun , Xin Yan , Yang Xia , Xiaoping Tian , Qiang Du , Lin Lu

{"title":"Energy absorption optimization of parametric plate lattices","authors":"Bingteng Sun , Xin Yan , Yang Xia , Xiaoping Tian , Qiang Du , Lin Lu","doi":"10.1016/j.compstruc.2025.107880","DOIUrl":"10.1016/j.compstruc.2025.107880","url":null,"abstract":"<div><div>This study introduces an optimization method for generating novel plate lattices with enhanced energy absorption characteristics, focusing on achieving high specific energy absorption and low peak crushing forces. While previous research has primarily analyzed the energy absorption behavior of conventional plate structures, we employ a multilayer perceptron (MLP) model to map the relationship between energy absorption indicators and shape parameters of parametric plate lattices. The optimization process utilizes the nondominated sorting genetic algorithm II (NSGA-II) to compute the Pareto optimal set, balancing high energy absorption with low peak crushing force to identify the optimal lattice design. The study also explores the impact of shape parameters on energy absorption properties. Results demonstrate that the proposed framework successfully generates plate lattices with superior energy absorption performance, with the PPL_B lattice significantly outperforming the SC-BCC-FCC plate lattice and D-type Triply Periodic Minimal Surface (TPMS) lattice in both simulations and physical experiments. These findings provide a valuable guideline for selecting ideal energy-absorbing lattices in practical applications.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107880"},"PeriodicalIF":4.4,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Particle Finite Element Method for investigating the influence of material and process parameters in 3D Concrete Printing 采用颗粒有限元法研究材料和工艺参数对混凝土3D打印的影响

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-05 DOI: 10.1016/j.compstruc.2025.107883

Giacomo Rizzieri, Simone Meni, Massimiliano Cremonesi, Liberato Ferrara

{"title":"A Particle Finite Element Method for investigating the influence of material and process parameters in 3D Concrete Printing","authors":"Giacomo Rizzieri, Simone Meni, Massimiliano Cremonesi, Liberato Ferrara","doi":"10.1016/j.compstruc.2025.107883","DOIUrl":"10.1016/j.compstruc.2025.107883","url":null,"abstract":"<div><div>3D Concrete Printing (3DCP) is an innovative construction technology that enables the efficient fabrication of complex objects through the extrusion of cementitious materials. However, the quality and integrity of the structural components are critically dependent on the accuracy of the extrusion and layer deposition processes. This study employs the Particle Finite Element Method (PFEM), consisting of an updated Lagrangian FEM formulation equipped with an efficient remeshing scheme, to virtually reproduce 3D printing of cementitious materials. PFEM allows for automatically tracking the free-surface and efficiently modelling the material as a non-Newtonian Bingham fluid. The numerical framework is applied to assess the impact of key material and process parameters (including yield stress, viscosity, nozzle diameter, nozzle height, translational velocity, and extrusion velocity) on the morphology of the printed layers. Results allow to create a prototype design chart providing an estimate of the filament shape based on selected material and printing parameters in free-flow deposition 3DCP. Additionally, from simulations, a dimensionless map can be generated distinguishing between five printing regimes: quasi-Newtonian flows, free-flow deposition of round shapes, free-flow deposition of spread shapes, filament tearing, and layer-pressing.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107883"},"PeriodicalIF":4.4,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predictive theoretical model for elastic modulus of marine geopolymer concrete: Insights into micro-mesoscopic components and alkaline content effects 海洋地聚合物混凝土弹性模量的预测理论模型：对细观成分和碱含量影响的见解

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-07-03 DOI: 10.1016/j.compstruc.2025.107876

Zhiyuan Yang , Hong Zhu , Bai Zhang , Qiang Wang , Peng Wu , Tianfeng Yang , Zhiqiang Dong

{"title":"Predictive theoretical model for elastic modulus of marine geopolymer concrete: Insights into micro-mesoscopic components and alkaline content effects","authors":"Zhiyuan Yang , Hong Zhu , Bai Zhang , Qiang Wang , Peng Wu , Tianfeng Yang , Zhiqiang Dong","doi":"10.1016/j.compstruc.2025.107876","DOIUrl":"10.1016/j.compstruc.2025.107876","url":null,"abstract":"<div><div>Marine geopolymer concrete, recognized for its low-carbon and highly durable properties, garnered considerable attention in ocean engineering applications. Given the lengthy testing and numerous variables in concrete research, developing a theoretical model with clear physical meaning to capture the effects of micro-mesoscopic components and alkaline content on the elastic modulus was essential. Based on multi-scale techniques, this study introduced a three-step homogenization framework to consider the impact of proportion for pores with different sizes on the elastic modulus of the concrete matrix. Then, a single-aggregate concrete was established using a two-phase spherical system, followed by a model incorporating both coral coarse aggregate and normal limestone aggregate via the Effective Medium Approximation. A damage factor was included to account for internal curing effects and matrix shrinkage-induced damage. Seven groups of concrete specimens with different coral coarse aggregate and alkaline contents were tested to validate the accuracy of the model. The model was then employed to thoroughly analyze the effects of total aggregate content, aggregate elastic modulus, aggregate volume fraction, sand ratio, total porosity, effective pore proportion, and alkaline content on concrete’s elastic modulus. The optimal design suggested a coral coarse aggregate volume fraction of 50% and an alkaline content of 5%.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"316 ","pages":"Article 107876"},"PeriodicalIF":4.4,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144548812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0