International Journal for Numerical and Analytical Methods in Geomechanics最新文献

{"title":"Simulation of Near-Fault 3D Ground Motion in Basins Within Complex Topography Using a Preconditioned Fast Multipole Indirect Boundary Element Method: A Case Study of the 2014 Ms 6.5 Ludian Earthquake in Yunnan, China","authors":"Zhongxian Liu,&nbsp;Zhenen Huang","doi":"10.1002/nag.70045","DOIUrl":"10.1002/nag.70045","url":null,"abstract":"<div>\u0000 \u0000 <p>This study proposes a preconditioned fast multipole indirect boundary element method (FMIBEM) for efficient and accurate simulation of 3D ground motions in near-fault intermountain basins. The method comprehensively models physical processes, including fault rupture, seismic wave propagation, topographic, and basin effects. Following a thorough validation of the method's accuracy and efficiency, it is applied to simulate ground motions in the 0.01–4.00 Hz frequency range from the 2014 Ms 6.5 Ludian earthquake in Yunnan, China, to elucidate the physical mechanisms driving the observed damage distribution. The earthquake occurred in a region characterized by significant topographic complexity, where non-horizontal, irregularly shaped sedimentary basins are embedded within undulating valleys. This setting represents a highly intricate multi-domain seismic wave scattering scenario. Numerical simulations successfully reproduce prominent near-fault phenomena such as directivity effects and the fling-step effect, while also highlighting the coupling between these near-fault effects and topographic amplification as well as basin effects. The results indicate that mountainous areas near the fault amplify ground motions, with stronger shaking typically occurring at mountain peaks compared to valleys. However, the directivity effect can reverse this trend, causing ground motions in valleys to surpass those on mountain tops. Simulation results from the 2014 Ms 6.5 Ludian earthquake demonstrate that the Longtoushan basin (an intermountain layered sedimentary basin) exhibits prominent amplification effects. The PGV and PGA amplification factors within the basin domain reached up to 17.28 and 18.01, respectively, when incorporating low-velocity basin sediments compared to the bedrock model devoid of basin structures. Due to the high impedance contrast between the basin and its surroundings, seismic energy becomes trapped within the basin, leading to higher amplitude ground motions and prolonged shaking durations compared to adjacent areas. In combination with the near-fault fling-step effect, this resulted in significant structural damage and even the collapse of many buildings in Longtoushan Town. This study provides valuable insights into the mechanisms of seismic damage in complex near-fault environments and offers scientific guidance for seismic hazard zoning and the seismic design of structures in such regions.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3777-3808"},"PeriodicalIF":3.6,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144900299","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}

{"title":"Prediction of the Behaviour of Monopiles Under Drained Two-Way Cyclic Lateral Loading in Sand","authors":"Shuhan Cao,&nbsp;Khalid Abdel-Rahman,&nbsp;Martin Achmus","doi":"10.1002/nag.70033","DOIUrl":"10.1002/nag.70033","url":null,"abstract":"<p>The monopile is considered as one of the preferred geotechnical foundations for the offshore wind energy converter; therefore, its cyclic behaviour is one of the major concerns in the design. In the current design approaches, the prediction of two-way cyclic behaviour mainly depends on empirical equations, in which the specific site conditions are not considered. Therefore, quantifying the cyclic behaviour of monopiles under two-way cyclic loading is still an issue under research. In this sense, the numerical method cyclic strain accumulation method (CSAM), which has already been validated on monopile and shallow foundations subjected to one-way cyclic loading in sand under drained conditions, is modified and applied to monopiles under two-way cyclic loading. Through the comparison between the numerical results and measurements on a small-scale test and a numerical investigation on a prototype monopile, it has been shown that the CSAM is capable of giving realistic predictions of the two-way cyclic behaviour of the monopiles and thus provides a new promising tool to describe the two-way cyclic behaviour of the monopiles, taking into account site-specific conditions.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3696-3712"},"PeriodicalIF":3.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nag.70033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermo-Hydro-Mechanical Behavior of Saturated Porous Media Under Non-Isothermal Flow With Fine Particle Migration","authors":"Xinle Zhai,&nbsp;Kamelia Atefi-Monfared","doi":"10.1002/nag.70044","DOIUrl":"10.1002/nag.70044","url":null,"abstract":"<p>Clogging of reservoir formations, known as permeability damage, and wellbore clogging due to mobilization and straining of in situ fine particles are critical challenges in enhanced geothermal systems. This study presents a novel fully coupled thermo-poro-elastic model to predict the thermo-hydro-mechanical (THM) response of saturated porous media containing fine particles during fluid injection and production operations. The model incorporates transient state fluid flow to capture the coupled effects of pore pressure, temperature changes, stress variations, and fines migration. Fine particles are considered monolayered and size-distributed, and the concentration of attached fines on the solid skeleton follows the modified particle detachment model. A finite element framework is developed to simulate the reservoir response, incorporating the fine migration effects, with a new expression for well impedance accounting for transient-state fluid flow. Results reveal that the permeability damage zone surrounding the wellbore expands over time, reducing minimum permeability to 13% of its original value after only 5h. Fine migration significantly alters pore pressure and effective stresses, leading to increased well impedance. Temperature variations influence pore pressure distribution and well impedance evolution through two mechanisms: altering fluid viscosity and inducing solid skeleton deformation, and triggering fines migration and associated permeability damage. These findings provide critical insights into reservoir behavior and strategies for optimizing geothermal energy production.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3731-3752"},"PeriodicalIF":3.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nag.70044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rock-Mass Quality Classification and 3D Mechanical Modeling Based on Oblique Photography Data","authors":"Yangxiao Liu,&nbsp;Wancheng Zhu,&nbsp;Xige Liu,&nbsp;Jiangmei Wang,&nbsp;Chengzhen Chen,&nbsp;Kai Guan","doi":"10.1002/nag.70029","DOIUrl":"10.1002/nag.70029","url":null,"abstract":"<div>\u0000 \u0000 <p>In order to analyze rock slope stability, efficient rock-mass characterization and 3D numerical modelling are very important. Unmanned aerial vehicle (UAV) oblique photogrammetry, with its low cost, high accuracy, and wide coverage, is commonly used in geological surveys and provides a foundation for rock-mass quality assessment. Utilizing UAV oblique photogrammetry data, this study proposed a comprehensive workflow achieve efficient 3D mechanical modeling, integrating data collection, rock-mass structure identification, rock-mass parameters calculation and numerical modeling. First, oblique photogrammetry was used to gather high-precision slope images and create a 3D reality model. A semantic segmentation network was then trained to automatically identify rock-mass structure types. Combined with manually determined discontinuity conditions, the rock-mass quality of the slope surface can be evaluated using the geological strength index (GSI). After that, the rock-mass quality within the slope was then estimated using a geostatistical interpolation method based on spatial variability. Rock-mass parameters were calculated using the Hoek–Brown criterion and represented in a three-dimensional block model. Finally, through coordinate mapping, these parameters were transferred to a numerical model, ensuring mechanical properties reflect spatial variability and match real-world conditions more effectively. Each step was validated for accuracy. A case study demonstrated that the heterogeneous model developed using this method outperformed the traditional homogeneous model, providing more accurate predictions of slope failure behavior.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3661-3676"},"PeriodicalIF":3.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851006","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}

{"title":"Numerical Study on a Frost Heave Model Considering the Critical Separation Pressure","authors":"Kun Hu,&nbsp;Guoqing Zhou,&nbsp;Jianpeng Liu,&nbsp;Yan Wu,&nbsp;Shaowei Wang","doi":"10.1002/nag.70040","DOIUrl":"10.1002/nag.70040","url":null,"abstract":"<div>\u0000 \u0000 <p>To address the issues, such as the unclear physical meaning of the existing criteria for ice lens formation and the empirical values of the critical separation pressure, this paper modified the criterion by using the sum of the tensile strength and the overburden pressure of the soil as a critical separation pressure. Also, the soil compression coefficient was introduced into the governing equations coupled water and heat transfer. Then, a one-dimensional frost heave model was proposed considering the soil pore deformation and the critical separation pressure. A one-dimensional freezing test and numerical calculation were carried out on saturated frost-susceptible clay. The results showed that the frost heave model proposed in this paper accurately reflected the distribution of the soil temperature fields, the water contents, and the ice lenses. The calculated results of the freezing depth, the frost heave, and the frost shrinkage were consistent with the experimental results, validating the frost heave model. The revised criterion couples the critical separation pressure and the soil temperature field, providing a common basis for the analysis of the ice lens formation in different soils. Considering the influence of the pore deformation on frost heave, the frost heave model proposed in this paper was used to obtain the frost shrinkage at the early stage of soil freezing, which cannot be calculated by the rigid ice model.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3713-3730"},"PeriodicalIF":3.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851009","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}

{"title":"A Modified Dual Porosity Model Considering the Capillary Pressure Difference Between Matrix and Fracture","authors":"Yaoyong Li,&nbsp;Yong Wang,&nbsp;Xin Cai,&nbsp;Jinbiao Yu,&nbsp;Xiaohong Wang,&nbsp;Zhifeng Liu","doi":"10.1002/nag.70031","DOIUrl":"10.1002/nag.70031","url":null,"abstract":"<div>\u0000 \u0000 <p>In fractured reservoirs, the capillary pressure is matrix and is usually much greater than in the fracture. This significant difference of capillary pressure induces an interface effect, where the saturation is discontinuous at the matrix–fracture interface. The conventional transfer function between matrix and fracture in the dual porosity model dose not account for this matrix–fracture interface effect and sometimes leads to results violating the physical principle. To improve the calculation of transfer function, an advanced form is proposed with the consideration of the matrix–fracture interface effect. The proposed form is quite simple and can be directly applied in the engineering application of numerical reservoir simulation and also in commercial software such as ECLIPSE and CMG with little modification. The numerical tests indicate a noticeable improvement of the proposed DP model compared to the conventional one.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3677-3695"},"PeriodicalIF":3.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851008","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}

{"title":"Analytical Solution for One-Dimensional Consolidation of Layered Composite Foundations With Partially Penetrated Impervious Piles Under Multi-Stage Loading","authors":"Jing Zhang,&nbsp;Mengfan Zong,&nbsp;Wenbing Wu,&nbsp;Yi Zhang,&nbsp;Guoxiong Mei,&nbsp;Xiaolong Zhou","doi":"10.1002/nag.70037","DOIUrl":"10.1002/nag.70037","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the consolidation behavior of layered foundations reinforced by partially penetrating impervious piles. The analytical solution of a layered composite foundation reinforced by partially penetrated impervious piles is derived by considering the assumption of vertical equal strain and multi-stage loading. The accuracy of the proposed analytical solution is confirmed through comparison with both a known special case solution and finite element method (FEM) simulation results. A comprehensive set of parametric studies is also performed using the derived analytical solution. The findings reveal that the application of multi-stage loading contributes to minimizing the build-up of excess pore water pressure (EPWP), while simultaneously decelerating the consolidation rate in composite foundation systems. Ignoring the underlying layer will overestimate the reinforcement effect of impervious piles on layered composite foundations.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3648-3660"},"PeriodicalIF":3.6,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851011","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}

{"title":"Effects of Grain Shape and Orientation on the Dynamic Mechanical and Damage Characteristics of Crystalline Rocks","authors":"Renjie Wu,&nbsp;Haibo Li,&nbsp;Guorui Feng,&nbsp;Daniel Dias,&nbsp;Yuxia Guo","doi":"10.1002/nag.70041","DOIUrl":"10.1002/nag.70041","url":null,"abstract":"<div>\u0000 \u0000 <p>Grain shape and orientation considerably affect the dynamic mechanical and damage characteristics of engineering projects related to crystalline rocks. In this study, a transformed grain-based model (TGBM) based on the transformation algorithm and the correction grouping algorithm is proposed to construct the model with different grain shapes and preferred orientation. Then, a novel calibration procedure is presented to determine the microparameters with respect to the TGBM dynamic simulation. Several methods are innovatively combined to reveal the mechanism of grain aspect ratio and preferred orientation on dynamic mechanical and damage characteristics of crystalline rocks. The results show that the preferred orientation is the main factor affecting crack characteristics, whereas the aspect ratio dominates the dynamic strength. Intragranular fracturing carries much weight and is the main failure mode in the high-strain-rate field; the occurrence frequency increases as the preferred orientation increases. Crystalline rocks with different preferred orientations have varying damage status on account of diverse failure modes. The dynamic strength of crystalline rock shows a strong sensitivity to the aspect ratio due to the changes in the proportions of different contact types.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3612-3629"},"PeriodicalIF":3.6,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144850802","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}

{"title":"Numerical and Experimental Investigation of Mortar Placement Dynamics in Drilling Slurry for Cast-in-Place Concrete Piles","authors":"Ayumi Morota,&nbsp;Tomotaka Morishita,&nbsp;Toshihiko Miura,&nbsp;Shinya Inazumi","doi":"10.1002/nag.70032","DOIUrl":"10.1002/nag.70032","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the dynamics of mortar placement in drilling slurry environments, a critical aspect of cast-in-place concrete piling. Mortar placement is affected by interactions with drilling slurry and sediment deposits, posing challenges such as segregation, void formation, and reduced structural integrity. This study uses experimental and numerical methods, integrating the moving particle semi-implicit (MPS) method, to simulate mortar–slurry interactions and validate the results with laboratory-scale tests. Controlled experiments replicated field conditions using drilling slurry with varying rheological properties and sediment content. The tests revealed that a portion of drilling slurry remained near the borehole wall, forming weak zones at the mortar–slurry interface. Additionally, convection currents influenced sediment redistribution, resulting in the accumulation of fine particles in the upper layers of the pile. Interface analysis indicated that these weak zones exhibited reduced compressive strength due to drilling slurry entrapment. Numerical simulations captured these dynamics and provided high-resolution visualizations of mortar–slurry interactions under realistic boundary conditions. The MPS simulations demonstrated that optimizing the tremie pipe placement could reduce sediment contamination by 25%–30%, improving structural integrity. This study highlights the importance of maintaining slurry quality and optimizing placement parameters, such as tremie pipe positioning and flow rates, to mitigate defects. Future work will focus on refining numerical models, real-time monitoring of grout quality, and sustainable construction practices. By addressing these challenges, this research contributes to more reliable and environmentally friendly geotechnical engineering solutions.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3574-3589"},"PeriodicalIF":3.6,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144850800","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}

{"title":"A Thermo–Hydro–Mechanical Coupled Shear Damage Constitutive Model for Rock-Concrete Interfaces","authors":"Yanni Zheng,&nbsp;Sheng Zhang,&nbsp;Chaojun Jia,&nbsp;Chenghua Shi,&nbsp;Mingfeng Lei","doi":"10.1002/nag.70035","DOIUrl":"10.1002/nag.70035","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;p&gt;The shear mechanical behavior of rock-concrete interfaces (RCIs) critically governs the stability of support structures in tunnel and underground engineering. However, these interfaces represent the weakest link in composite systems, especially under high geothermal conditions. In such environments, post-construction concrete is subjected to high-temperature curing in direct contact with hot surrounding rock, leading to thermal damage. During tunnel operation, geothermal water infiltration induces further interface degradation through thermo-hydro-mechanical (T–H–M) coupling. To address these challenges, this study develops a novel shear damage constitutive model for RCIs under T–H–M coupling by integrating statistical damage theory with the JRC-JCS joint strength criterion. A systematic parameter calibration methodology is established to ensure model accuracy and reliability. Comprehensive shear tests on concrete-granite interfaces demonstrate the model's strong capability to replicate the full-range shear stress–strain behavior under T–H–M coupling. Furthermore, the model was further modified to overcome two critical limitations of compressive-type statistical damage approaches: (1) inadequate representation of nonlinear concave curvature during pre-peak yielding, and (2) poor characterization of residual strength evolution post-peak. Based on the developed shear damage constitutive model, the evolution of interface damage during high-temperature curing in the construction stage and the subsequent T–H–M-induced degradation operation are systematically analyzed. These findings provide theoretical foundations for optimizing tunnel support design in geothermal environments, particularly by identifying early microcrack initiation thresholds and guiding damage-informed reinforcement strategies.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Summary&lt;/h3&gt;\u0000 \u0000 &lt;div&gt;\u0000 &lt;ul&gt;\u0000 \u0000 &lt;li&gt;\u0000 &lt;p&gt;Shear tests identify four-phase T–H–M behavior: compaction, elasticity, hardening, and softening.&lt;/p&gt;\u0000 &lt;/li&gt;\u0000 \u0000 &lt;li&gt;\u0000 &lt;p&gt;Novel T–H–M-coupled shear damage model integrating JRC-JCS criterion with statistical damage theory.&lt;/p&gt;\u0000 &lt;/li&gt;\u0000 \u0000 &lt;li&gt;\u0000 &lt;p&gt;Modified statistical formulation resolves pre-peak nonlinearity and post-softening limitations.&lt;/p&gt;\u0000 &lt;/li&gt;\u0000 \u0000 &lt;li&gt;\u0000 &lt;p&gt;Experimental validation shows &lt;2% error in peak strength and residual stress prediction.&lt;/p&gt;\u0000 &lt;/li&gt;\u0000 \u0000 &lt;li&gt;\u0000 &lt;p&gt;Critical damage thresholds identified (D = 0.32 for microcracks, D = 0.6 for macro-fractures).&lt;/p&gt;\u0000 &lt;/li&gt;\u0000 ","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"3590-3611"},"PeriodicalIF":3.6,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144850799","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}