Computers and Geotechnics最新文献

{"title":"Multiscale damage constitutive model of rock based on the energy evolution of mineral grains and its application","authors":"Biaohe Zhou ,&nbsp;Cheng Zhao ,&nbsp;Huiguan Chen ,&nbsp;Jinquan Xing","doi":"10.1016/j.compgeo.2025.107638","DOIUrl":"10.1016/j.compgeo.2025.107638","url":null,"abstract":"<div><div>This study employs a phase-field method that considers mineral distribution to analyze the energy evolution of grains, establishing a multiscale damage constitutive model of rock on the basis of the energy laws of mineral grains. The proposed constitutive model is applied to analyze slope stability, achieving multiscale coverage from the mineral grain scale to the engineering scale. Random classification of Voronoi polygons is used for mineral-scale modeling, incorporating the coupling of mineral plasticity and damage. The evolution of macroscopic damage is obtained through statistical analysis of mineral grain energy. By deriving the relationships between the statistical parameters and the macroscopic mechanical variables, the statistical laws of mineral grain energy are applied to constitutive modeling at the sample scale. A corresponding numerical algorithm is developed and applied to strength reduction deformation calculations for slopes. The results indicate that the mineral-scale simulation method effectively captures the nonlinear mechanical behavior and progressive failure process of rock. The stress and strain concentrations result in a right-skewness in the data distribution of the mineral grain strain energy density, which can be accurately described by a log-normal distribution. The mean parameter of the grain strain energy density is equal to the macroscopically homogenized strain energy density, whereas the variance parameter reflects the mesoscopic heterogeneity and can be linearly represented by the macroscopic damage variable. The constitutive model based on mineral grain energy evolution accurately captures damage evolution at the sample scale and closely fits the measured stress–strain curves. This research provides a reference for evaluating the mechanical properties of rock masses and for disaster prevention and control.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107638"},"PeriodicalIF":6.2,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupled CFD-DEM modeling of fine particles and fibers migration and clogging mechanisms in bridging regions","authors":"Ran Lin ,&nbsp;Yinjian Huang ,&nbsp;Jinzhou Zhao ,&nbsp;Lan Ren ,&nbsp;Zhihao Yu ,&nbsp;Zhiqiang Li ,&nbsp;Jianfa Wu ,&nbsp;Yi Song ,&nbsp;Cheng Shen","doi":"10.1016/j.compgeo.2025.107647","DOIUrl":"10.1016/j.compgeo.2025.107647","url":null,"abstract":"<div><div>Temporary plugging and diverting fracturing enhances unconventional reservoir stimulation by forming a tight sealing layer through the bridging and filling of diverters in fractures. The tightness and pressure bearing capacity of the sealing layer are governed by the clogging efficiency of fine particles and fibers in the bridging region. However, the clogging mechanism within the pores of coarse particles after bridging remains poorly understood. This study employs a hybrid CFD-DEM method to investigate the migration and clogging behavior of diverters in a bridging skeleton. The results indicate that fine particles initially migrate rapidly through dominant flow paths, while fiber movement is restricted by their high aspect ratio and mainly localized at the skeleton entrance. In single-size particle systems, larger fine particles form size-dominated clogs at pore throats, with clogging ratios increasing with both particle size and concentration. Mixed particle systems exhibit a more uniform clogging distribution and reduced sensitivity to concentration, owing to the cooperative filling of pore spaces. Fibers exhibit high clogging ratios under all conditions due to their tendency to attach and entangle on bridging particle surfaces. In single-size systems, particles whose sizes match pore throats and higher concentrations yield denser, less permeable sealing layers. Mixed particle systems result in even lower normalized permeability via synergistic filling. Fiber-induced clogging leads to the lowest permeability, forming continuous covers at pore entrances. For clogging stability, fine particles exhibit a “high contact number-high clogging ratio” pattern, while fibers display a “moderate contact number-high clogging ratio” pattern with fewer contacts required for retention. At low concentration, fine particles exhibit pronounced anisotropy in normal contact forces distribution, while mixed particle systems and fibers both reduce this anisotropy and promote a more uniform force network. This study clarifies multiscale sealing mechanisms and provides a theoretical basis for optimizing temporary plugging and diverting fracturing.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107647"},"PeriodicalIF":6.2,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multimode tunnel deformation analysis under oblique normal faulting considering gap formation and horizontal intersection","authors":"Yingbin Liu ,&nbsp;Shaoming Liao ,&nbsp;Junzuo He ,&nbsp;Jiacheng Sun ,&nbsp;Zewen Li","doi":"10.1016/j.compgeo.2025.107617","DOIUrl":"10.1016/j.compgeo.2025.107617","url":null,"abstract":"<div><div>Tunnels affected by normal faulting at an oblique angle are susceptible to multiple-mode deformation, which include not only the commonly discussed bending, shearing, and flattening modes but also torsional and warping deformation. Existing analytical ground–tunnel interaction models typically fail to consider torsion, flattening and warping and disregard the formation of gaps between the tunnel and the ground. To mitigate this gap, this paper proposes a new quasi-three-dimensional (3D) ground–tunnel interaction model grounded in generalized beam theory, which considers gap formation and an arbitrary 3D intersection angle with normal faults. In the proposed model, the tunnel was idealized as a pipeline resting on a Winkler foundation, with five deformation modes considered: shearing, bending, flattening, torsion, and warping. To capture the effects of varying ground behaviour, three-dimensional heterogeneous ground models were developed to represent active and passive ground resistance, discontinuous contact at the ground–tunnel interface, and spatially variable stiffness within shear zones. The corresponding finite element formulation is established through the application of the minimum potential energy principle. Through three case studies, the validity of the proposed approach was demonstrated, highlighting its advantages over traditional analytical methods. Finally, parametric studies were performed to investigate the influence of the intersection angle and shear zone on tunnel deformation behaviour. The proposed methods contribute to a better understanding of ground–tunnel interactions and complicated cross-sectional deformation under normal faults, which is beneficial for the design and protection of existing tunnels.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107617"},"PeriodicalIF":6.2,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-failure numerical analysis of rainfall-triggered landslides at the basin-scale","authors":"David Sebastian Calpa ,&nbsp;Fabricio Fernández ,&nbsp;Euripedes A. Vargas Jr. ,&nbsp;Guilherme J.C. Gomes ,&nbsp;Raquel Q. Velloso ,&nbsp;Marcelo Miqueletto ,&nbsp;Marcos Massao Futai","doi":"10.1016/j.compgeo.2025.107622","DOIUrl":"10.1016/j.compgeo.2025.107622","url":null,"abstract":"<div><div>Climate change and rapidly growing urbanization demand advanced, physically based approaches for mapping landslide-prone regions. Yet, most existing models rely on simplified assumptions regarding subsurface water flow and slope stability analysis. This paper introduces a novel fully numerical framework (MFNA-3D) that advances basin-scale simulation of rainfall-induced slope failures through an innovative multi-failure algorithm based on Numerical Limit Analysis (NLA). The proposed method employs a one-way coupling strategy that links a three-dimensional solution of Richards equation for transient, variably saturated subsurface flow with a newly developed NLA-based stability model tailored for large-scale slope stability assessment. The NLA-based algorithm enables the efficient delineation of multiple and simultaneous failure zones with irregular geometries and the quantification of failure volumes, without requiring a priori assumptions about their shape or location. MFNA-3D improves the physical realism of basin-scale landslide simulations by capturing the effects of antecedent and extreme rainfall on pore-water pressure and stability evolution. The methodology was applied to a landslide-prone tropical basin in the state of Rio de Janeiro, Brazil, incorporating mesh refinement and parametric sensitivity analyses. Quantitative validation was conducted by comparing the Fs maps obtained from the proposed approach with those generated using the infinite slope method, against mapped landslide scars. Results confirm the model’s capability to reproduce complex landslide behavior at the basin scale. This study positions MFNA-3D as a scalable and physically grounded numerical tool for advanced landslide hazard mapping.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107622"},"PeriodicalIF":6.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical investigation and ML-based formulation for conventional and modified suction caissons subjected to unidirectional and combined loadings","authors":"Kewen Zhu ,&nbsp;Hang Feng ,&nbsp;Jian Yu ,&nbsp;Sen Li","doi":"10.1016/j.compgeo.2025.107637","DOIUrl":"10.1016/j.compgeo.2025.107637","url":null,"abstract":"<div><div>The modified suction caisson (MSC), incorporating an external short-skirted structure in addition to its inner caisson, represents an innovative variant of the conventional suction caisson (CSC) in offshore engineering. However, currently available studies lack a comprehensive comparative analysis of CSCs and MSCs and a unified prediction formulation for these foundations, which are essential for practical engineering design. To address this gap, this study systematically compares bearing capacities of CSCs and MSCs under unidirectional and combined loadings using finite element limit analysis (FELA), and proposes a unified failure envelope formulation via the evolutionary polynomial regression (EPR) machine learning technique. In particular, key influencing factors including caisson geometries, soil strength profiles, and interface adhesion are also systematically analyzed. FELA results reveal design recommendations: (i) the failure envelope of MSC and CSC is primarily influenced by the embedment ratio of the inner caisson, with minimal effects from interface adhesion or soil strength heterogeneity; (ii) a 20% increase in external skirt width results in improvements of at least 20% and 23% in vertical and lateral bearing capacities, respectively; and (iii) the lateral capacity becomes independent of the external skirt length once it exceeds 20% of the inner caisson length. Using the FELA dataset, the EPR technique can provide unified and effective bearing capacity formulations.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107637"},"PeriodicalIF":6.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polar and Cartesian representations of mechanical quantities in granular materials","authors":"Chuang Zhao ,&nbsp;Chengbo Li","doi":"10.1016/j.compgeo.2025.107632","DOIUrl":"10.1016/j.compgeo.2025.107632","url":null,"abstract":"<div><div>Characterizing mechanical quantities in granular materials is essential for understanding the relationship between macroscopic behavior and microstructural features. A key step in this process is the anisotropic decomposition of the spatial distributions of these quantities. However, studies on arbitrary-order anisotropic expansions are still scarce, and the problem remains challenging. Building on the introduction of projection operators, this study presents the expressions of irreducible tensor bases in two- and three-dimensional Cartesian coordinates and establishes the correspondence between Cartesian expansions and Fourier or spherical harmonic expansions in polar coordinates. A general theoretical framework is proposed for describing the distribution of mechanical quantities in both coordinate systems, together with the relations between the anisotropy coefficients in the two frames. Polar expansion coefficients, easy to compute, are converted into Cartesian coefficients with clearer physical meaning, allowing macroscopic properties to be explained by microscopic mechanical distributions. Finally, the theory is validated through discrete element simulations of 2D super-elliptic and 3D super-ellipsoidal systems, where stress and elastic modulus anisotropy are calculated to explain macroscopic properties. The proposed method simplifies anisotropy characterization without order limitations.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107632"},"PeriodicalIF":6.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A micromechanical study of shear-weakening characteristics of granular flow in a torsional shear cell","authors":"Xiaoran Sheng ,&nbsp;Qi Zhang ,&nbsp;Huabin Shi","doi":"10.1016/j.compgeo.2025.107591","DOIUrl":"10.1016/j.compgeo.2025.107591","url":null,"abstract":"<div><div>This study employs Discrete Element Method (DEM) simulations to investigate the micromechanical characteristics of granular materials subjected to shear in a torsional shear cell across various flow regimes, including quasi-static, transitional, and grain-inertial states. Two simulation configurations with slightly different initial volume fractions (packing densities) were compared to elucidate both force chain evolutions and macroscopic rheological responses of granular flow. The observed macroscopic stress responses, particularly shear-weakening phenomenon, were further interpreted using modified analytical constitutive laws. This approach successfully captured the trends and yielded quantitative macroscopic parameters that are sensitive to initial packing density. By further tracking the evolution of force chain properties such as length, number, curvature, anisotropy, and load distribution, we aim to establish connections between microscopic force chain characteristics and macroscopic rheological behavior like shear-weakening observed in the transitional regime. The results reveal distinct evolutionary patterns in force chain characteristics across different flow regimes and between the two simulation configurations. Notably, specific parameters such as opposing trends in force chain anisotropy and different variations in force chain numbers between two configurations can serve as microscopic indicators for identifying more noticeable macroscopic shear-weakening phenomenon. Conversely, parameters such as force chain curvature exhibited a reduced dependence on packing density and interparticle stress, indicating that they are more reflective of intrinsic structural reorganization patterns. This research enhances our understanding of the micromechanical origins of granular rheology and establishes connections between macroscopic constitutive parameters and microscopic force chain indicators.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107591"},"PeriodicalIF":6.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of fault permeability anisotropy on the nucleation and rupture of injection-induced earthquakes","authors":"David Santillán ,&nbsp;Ruben Juanes ,&nbsp;Sandro Andrés ,&nbsp;Luis Cueto-Felgueroso","doi":"10.1016/j.compgeo.2025.107613","DOIUrl":"10.1016/j.compgeo.2025.107613","url":null,"abstract":"<div><div>This study investigates the impact of fault permeability anisotropy on the nucleation and rupture of injection-induced earthquakes. Using numerical models, we analyze the effects of varying fault permeability in both, transverse and longitudinal directions. Our research focuses on understanding how these hydraulic properties influence the onset of slip, the nucleation length, and the propagation of the rupture.</div><div>We simulate more than 400 cases with different combinations of friction parameters and hydraulic properties, verifying that the reference scaling <span><math><mrow><msub><mrow><mi>L</mi></mrow><mrow><mi>∞</mi></mrow></msub><mo>=</mo><mfrac><mrow><mi>b</mi></mrow><mrow><msup><mrow><mrow><mo>(</mo><mi>b</mi><mo>−</mo><mi>a</mi><mo>)</mo></mrow></mrow><mrow><mn>2</mn></mrow></msup></mrow></mfrac><mfrac><mrow><msup><mrow><mi>G</mi></mrow><mrow><mo>′</mo></mrow></msup><msub><mrow><mi>D</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow><mrow><mover><mrow><msubsup><mrow><mi>σ</mi></mrow><mrow><mi>n</mi></mrow><mrow><mo>′</mo></mrow></msubsup></mrow><mo>¯</mo></mover></mrow></mfrac></mrow></math></span> provides satisfactory results for scaling nucleation length. Our findings indicate that increased fault permeability delays the onset of slip and affects nucleation patterns, with high longitudinal permeability promoting larger nucleation lengths and high transverse permeability resulting in longer nucleation times.</div><div>During rupture propagation, poroelastic effects cause undrained responses in pore pressure, significantly affecting the fault strength. Permeable faults exhibit more symmetrical rupture patterns and higher seismic moments than impermeable faults. The study highlights the crucial role of hydraulic properties in the development of nucleation and rupture of induced earthquakes, emphasizing the importance of these properties for designing safer injection protocols.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107613"},"PeriodicalIF":6.2,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Particle breakage limits packing density effect on pile resistance in crushable soils","authors":"Trong Nghia-Nguyen ,&nbsp;Rahmat Kurniawan ,&nbsp;Mamoru Kikumoto","doi":"10.1016/j.compgeo.2025.107631","DOIUrl":"10.1016/j.compgeo.2025.107631","url":null,"abstract":"<div><div>This study conducted numerical simulations of pile-bearing capacity using a finite element framework that incorporates a model for crushable soils, considering the effects of packing density. Simulations were performed for both crushable and non-crushable soils to assess how packing density affects stress–strain behavior and particle breakage during pile penetration. Results indicated that in non-crushable soils, pile resistance was significantly increased in denser soils. However, when particle breakage was included, the bearing resistance showed minimal difference between dense and loose soils. This phenomenon, consistent with experimental findings of cone penetration in pumice sand, a crushable soil. The simulations captured variation in stress–strain behavior and particle breakage around the pile tip, which are challenging to observe experimentally. In non-crushable soils, especially in dense conditions, increased dilatancy during shearing raised mobilized stresses, leading to higher shear resistance and bearing capacity. In contrast, in crushable soils, early particle breakage reduced dilatancy and mobilized stresses, minimizing the difference in bearing resistance between dense and loose soils. Additionally, particle breakage extended about 2D (D is pile diameter) below the pile tip, regardless of soil density. These findings suggest that conventional methods for calculating pile-bearing capacity can be extended to predict behavior in crushable soils by considering reduced mobilized stresses and shear resistance due to particle breakage. The study enhances the understanding of pile behavior in crushable soils and highlights the impact of soil density on pile resistance.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107631"},"PeriodicalIF":6.2,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macro-micro bearing analysis of shallow footings on geogrid reinforced coral sands considering varied geogrid properties","authors":"Zhaogang Luo ,&nbsp;Xuanming Ding ,&nbsp;Joseph Mbenza ,&nbsp;Qiang Ou ,&nbsp;Ting Zhang ,&nbsp;Xihong Zhang","doi":"10.1016/j.compgeo.2025.107606","DOIUrl":"10.1016/j.compgeo.2025.107606","url":null,"abstract":"<div><div>The geogrid reinforced coral sand (GRCS) technique effectively stabilizes large-scale sites in island and coastal areas. This study develops a model test-based 3D discrete–continuous numerical model to investigate the macro–micro bearing behavior of shallow footings on reinforced coral sands, focusing on the effect of geogrid properties such as tensile strengths and node (rib) dimensions. Macroscopic bearing performance is improved with the enhanced geogrid properties, i.e., a maximum 141% increase in bearing capacity compared to the unreinforced condition. Microscopic mechanical analysis indicates enhanced geogrid properties impede stress transfer and particle movement, reducing geogrid buckling and foundation failure depth. The amount and spatial distribution of particle breakage in foundation soils depends on stress levels and particle displacements. These macro–micro bearing performances arise from stress difference and stress diffusion angle induced by geogrid properties. Given the uniform reinforcement mechanism under the influence of geogrid properties, a calculation method for the bearing capacity considering the stress difference and stress diffusion angle is proposed and validated against the numerical results. The presented study is of great significance for understanding the macro–micro bearing behavior and reinforcement mechanisms of shallow footings on geogrid reinforced coral sands.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"189 ","pages":"Article 107606"},"PeriodicalIF":6.2,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}