Journal of Wind Engineering and Industrial Aerodynamics最新文献

{"title":"Estimating peak pressure coefficients for high-rise buildings: LES-based evaluation of Gumbel and XIMIS methods","authors":"Latife Atar,&nbsp;Jack K. Wong,&nbsp;Oya Mercan","doi":"10.1016/j.jweia.2025.106161","DOIUrl":"10.1016/j.jweia.2025.106161","url":null,"abstract":"<div><div>Accurately estimating peak wind pressures is essential for the safe and cost-effective design of high-rise buildings. This study evaluates LES-based peak pressure coefficient predictions for high-rise buildings, using 1-h equivalent full-scale wind tunnel data from Tokyo Polytechnic University as a reference. The research examines the effects of segment durations, number of segments, total EFS durations, and wall-specific error analysis and prediction uncertainties in LES. The Cook-Mayne conversion standardized shorter segments to a 60-min EFS duration but introduced prediction discrepancies, particularly for negative peak pressures. Findings indicate that longer total durations with moderate segment lengths yield reliable maximum pressure predictions, while shorter segment durations are more effective for minimum pressures. Wall-specific analysis reveals greater uncertainties near the ground on side and leeward walls due to recirculation and separation, and at higher elevations on the windward wall from stagnation effects. The XIMIS method yields peak estimates comparable to the Gumbel method, effectively handles limited data. While LES shows strong potential for capturing peak pressures, its accuracy in Gumbel based analysis is sensitive to segment and total simulation durations. In contrast, XIMIS offers consistent results without need for segmentation, making it particularly valuable when data availability is limited.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106161"},"PeriodicalIF":4.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534457","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 multiscale framework for the risk analysis of urban building envelope systems subject to windborne debris considering the directional effect of tropical cyclones","authors":"Xu Hong ,&nbsp;Xi-Zhong Cui ,&nbsp;Meng-Ze Lyu ,&nbsp;Fan Kong","doi":"10.1016/j.jweia.2025.106160","DOIUrl":"10.1016/j.jweia.2025.106160","url":null,"abstract":"<div><div>Windborne debris poses a significant threat to the envelope systems of urban high-rise buildings during tropical cyclones (TCs). The time varying feature of TC surface wind makes it inadequate to ignore the wind direction effect in the analysis of the windborne debris risk to envelop systems. To address this issue, this paper proposes an integrated framework that spans the entire process from TC generation based on physical stochastic sources, to local urban wind environment simulations, and to detailed debris flight trajectory modeling and impact fragility analysis of envelope systems. This framework establishes a multiscale perspective for analyzing the uncertainty propagation associated with the windborne debris risk from regional meteorological scale to local urban scale and debris scale. First, the joint probability distribution of TC maximum wind speed and surface wind direction is derived based on TC wind hazard assessment technique. Next, the urban wind field is simulated by a computational fluid dynamics (CFD) model, and the debris flight trajectory in the local wind environment is simulated by a rigid-body dynamical model. The urban wind field model and debris flight trajectory model are then used to estimate the fragility of the envelope system given specific wind speeds and directions. Finally, the annual occurrence rate that the number of damaged glazing units exceeds certain thresholds is derived using the total probability theorem. A 100-m high-rise building located in Shanghai is used to illustrate the application of the proposed framework. A detailed analysis of the illustrative application is presented and the results show that ignoring wind direction effects may overestimate the risk of windborne debris to envelope systems.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106160"},"PeriodicalIF":4.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534458","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 assessment of train slipstream in tunnels: Stochastic analysis from CFD data","authors":"S. Negri ,&nbsp;G. Tomasini ,&nbsp;D. Rocchi ,&nbsp;P. Schito ,&nbsp;D. Soper ,&nbsp;H. Hemida","doi":"10.1016/j.jweia.2025.106130","DOIUrl":"10.1016/j.jweia.2025.106130","url":null,"abstract":"<div><div>The train slipstream, referring to the dynamic airflow induced by moving trains, presents significant safety risks in confined environments like tunnels. While much research has focused on slipstream effects in open air, studies in tunnels are limited due to the challenges of simulating these complex aerodynamic conditions. This study aims to address these challenges by validating a CFD model based on URANS for train slipstream analysis in tunnels, comparing it against experimental data. A novel numerical statistical approach is introduced, enabling the robust characterization of slipstream phenomena using extended tunnel configurations, allowing the collection of multiple independent velocity profiles from a single simulation. The results highlight the differences in slipstream behavior between short and extended tunnels, emphasizing the impact of tunnel length on piston wind and wake development. By focusing on statistical comparisons, including ensemble mean, standard deviation, and peak distribution, the study demonstrates that the multiple-probe approach offers a robust and detailed representation of slipstream behavior. This methodology provides a general and replicable framework for characterizing slipstream flow statistics, proving especially valuable during early train and tunnel design stages where experimental data are lacking, and showing promising potential in the context of train homologation processes.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"264 ","pages":"Article 106130"},"PeriodicalIF":4.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535644","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":"Investigation on a good combination of inlet air spray pre-cooling and Y-type windbreak in a natural draft dry cooling tower","authors":"Yu Luo ,&nbsp;Weiran Shi ,&nbsp;Ke Sun ,&nbsp;Huimin Pang ,&nbsp;Suoying He ,&nbsp;Yang Gao ,&nbsp;Chao Wang ,&nbsp;Jingrun Zhang ,&nbsp;Bing Han ,&nbsp;Ghulam Qadir Chaudhary ,&nbsp;Muzaffar Ali ,&nbsp;Ming Gao","doi":"10.1016/j.jweia.2025.106159","DOIUrl":"10.1016/j.jweia.2025.106159","url":null,"abstract":"<div><div>Crosswind affects the airflow of natural draft dry cooling towers (NDDCTs), which will in turn affect the trajectory of spray water droplets and will impair the pre-cooling effect of NDDCTs. This study develops 3-D models to simulate the operation of a 120 m high NDDCT with seven spray pre-cooling schemes and Y-type windbreak, aiming to optimize their combination. The simulation finds that: (1) The one-circle arranged spray nozzles increase the tower's heat rejection rate up to 7.01 % (increased from 123.68 MW to 132.35 MW) compared with no spray while the linear-arranged spray nozzles increase the heat rejection rate up to 5.84 % (increased from 123.68 MW to 130.90 MW); (2) The three-circle nozzle arrangement produces the highest heat rejection rate as 147.99 MW with an 22.89 % improvement compared with no spray, while the one-circle nozzle arrangement with the radius of 21.50 m produces the lowest heat rejection rate as 129.10 MW with an 7.21 % improvement; the water evaporation ratio follows the order of one-circle at the radius 41.50 m as 100.00 %, two-circle as 99.00 % and three-circle as 98.52 % is the last; (3) The two-circle arranged spray nozzles with the radii of 31.50 m and 41.50 m, the total water flowrate of 14.8 kg/s and nozzle number of 74 are found to be a good combination with the Y-type windbreak for performance improvement of the NDDCT, which improves the heat rejection performance of the NDDCT well (with 15.84 % improvement, i.e., increased from 120.42 MW at no spray to 139.49 MW) with moderate water consumption (not too high and not too low) of 14.8 kg/s and high water evaporation ratio of 99.00 %.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106159"},"PeriodicalIF":4.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534456","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":"Impact of sloped terrain on wind loads in high-rise Buildings: An experimental wind tunnel investigation","authors":"Zengshun Chen ,&nbsp;Zhihang Zhao ,&nbsp;Siyu Wang ,&nbsp;Yemeng Xu ,&nbsp;Zhangchen Qin ,&nbsp;Ke Li ,&nbsp;Bubryur Kim","doi":"10.1016/j.jweia.2025.106156","DOIUrl":"10.1016/j.jweia.2025.106156","url":null,"abstract":"<div><div>Topographic wind effects can significantly enhance wind loads on high-rise buildings, leading to structural damage, occupant discomfort, and increased safety risks. This study investigates the impact of sloped terrain on wind loads through synchronized pressure measurements in a wind tunnel. We tested square-sectioned high-rise building models under various slope gradients and building-slope spacings. Our analysis systematically compared disturbed wind profiles, surface pressure distributions, and wind forces on the building model across different terrains. The findings indicate that sloped terrains intensify flow acceleration, amplifying mean wind pressures by approximately 20 % on upper building sections (z/H &gt; 0.7) compared to flat terrain. Moreover, terrain-induced turbulence increases fluctuating pressures and alters flow structures near a building's base. Interestingly, the increase in terrain slope is positively associated with the intensity of terrain-induced turbulence; however, flow acceleration does not exhibit a linear relationship with the terrain slope. Under identical terrain heights, a mild slope may induce a great degree of acceleration, leading to a more substantial increase in wind loading. These results provide direct evidence for wind load regulations for buildings situated in sloped terrain.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"264 ","pages":"Article 106156"},"PeriodicalIF":4.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524299","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":"Development of cost-effective CFD modeling techniques for transient missions of hyperloop vehicles","authors":"J. Galindo,&nbsp;R. Navarro,&nbsp;L. García-Cuevas,&nbsp;B. Pallás","doi":"10.1016/j.jweia.2025.106153","DOIUrl":"10.1016/j.jweia.2025.106153","url":null,"abstract":"<div><div>Hyperloop system represents a promising alternative to the conventional means of transportation to face the critical environmental situation. Unfortunately, CFD modeling of hyperloop transient missions with a standard overset approach presents a high computational effort. This work aims to develop a methodology that reduces the cost of modeling a simplified pod with a three-phase operation: acceleration, cruise and deceleration. Firstly, a comparison between an overset domain and one employing Non-Reflecting Boundary Conditions (NRBCs) is conducted, resulting in a halving of the computational time and obtaining deviations of just 2.4% in vehicle drag. However, the larger reduction in cost comes with the development of an equivalent quasi-steady state configuration for hyperloop systems. The leading contribution of this paper is that the proposed approach considers the effect of the induced mass flow generated by the effect of moving a pod inside a tube, a non-negligible effect. Such a novel method helps reduce the error in terms of drag coefficient, which can achieve values higher than 40% if the boundary conditions for the steady state are not properly corrected. Consequently, the proposed method reduces simulations cost up to 35 times with an average error of only the 4% in power requirement predictions.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"264 ","pages":"Article 106153"},"PeriodicalIF":4.2,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513682","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":"Gap effects on the aerodynamic characteristics and flow patterns of a long-span rail-cum-road bridge girder with three separated boxes","authors":"Yize Ran ,&nbsp;Wen-Li Chen ,&nbsp;Hui Li ,&nbsp;Donglai Gao","doi":"10.1016/j.jweia.2025.106137","DOIUrl":"10.1016/j.jweia.2025.106137","url":null,"abstract":"<div><div>Separated box girder configurations enhance flutter stability in long-span bridges but introduce more complex flow interactions within the gaps, potentially inducing vortex-induced vibrations (VIV) at lower wind velocities. This study investigates the effects of gap ratios (<span><math><mrow><mi>G</mi><mo>/</mo><mi>H</mi></mrow></math></span>) on the aerodynamic characteristics and flow patterns of a long-span rail-cum-road bridge girder with three separated boxes. Stationary wind tunnel tests were conducted for <span><math><mrow><mi>G</mi><mo>/</mo><mi>H</mi></mrow></math></span> ranging from 0.000 to 7.752. Combined time–frequency analysis, pressure measurements, and smoke–wire visualizations revealed distinct flow characteristics for various gap ratio cases. As <span><math><mrow><mi>G</mi><mo>/</mo><mi>H</mi></mrow></math></span> increased, the upstream and middle box girders successively influenced the flow through vortex impingement on the windward sides of the downstream box girders. When <span><math><mrow><mi>G</mi><mo>/</mo><mi>H</mi></mrow></math></span> exceeded a critical threshold, the dominant frequency of the wake flow behind the downstream box girder became pronounced, indicating a general reduction in the influence of the upstream wake. The surface pressure distributions corroborated the observed vortex dynamics. Four distinct gap flow patterns were categorized: Pattern A exhibited overshoot flows in both upstream and downstream gaps for <span><math><mrow><mi>G</mi><mo>/</mo><mi>H</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>000</mn></mrow></math></span> to 0.678; Pattern B featured shear layer impingement in the upstream gap combined with vortex impingement in the downstream gap for <span><math><mrow><mi>G</mi><mo>/</mo><mi>H</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>775</mn></mrow></math></span> to 1.260; Pattern C displayed vortex impingement in the upstream gap and a secondary vortex street in the downstream gap for <span><math><mrow><mi>G</mi><mo>/</mo><mi>H</mi><mo>=</mo><mn>1</mn><mo>.</mo><mn>357</mn></mrow></math></span> to 1.841; Pattern D demonstrated alternate vortex shedding in both upstream and downstream gaps for <span><math><mrow><mi>G</mi><mo>/</mo><mi>H</mi><mo>=</mo><mn>1</mn><mo>.</mo><mn>938</mn></mrow></math></span> to 7.752. The phase lag between the fluctuating lift coefficients of adjacent box girders and the spanwise coherence coefficient elucidated the aerodynamic characteristics of the three-box girder under different gap flow patterns.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"264 ","pages":"Article 106137"},"PeriodicalIF":4.2,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365806","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 design method of aeroelastic model for long-span three-tower steel truss girder cable-stayed bridges","authors":"Shang Congjie ,&nbsp;Xiang Huoyue ,&nbsp;Tian Xiangfu ,&nbsp;Bao Yulong ,&nbsp;Li Yongle ,&nbsp;Luo Kou","doi":"10.1016/j.jweia.2025.106152","DOIUrl":"10.1016/j.jweia.2025.106152","url":null,"abstract":"<div><div>Traditional design methods of aeroelastic model for bridges do not strictly consider the similarity requirements of the axial and torsional stiffness of bridge towers, and are not suitable for simulating three-tower cable-stayed bridges. Moreover, the damping ratios of the aeroelastic model for steel truss cable-stayed bridges are usually difficult to control. In this paper, a design method of aeroelastic model for long-span three-tower steel truss girder cable-stayed bridge is proposed for the first time. For the bridge tower model, the multiaxial stiffness decoupling is realized by deducing the mechanical principle of the Uniaxial Multi-point Elastic Constraint (UMEC) model. For the steel truss girder model, the simulation of low damping ratio is realized by separating the shape system from the stiffness system. a full-bridge aeroelastic model with a geometric scale ratio of 1/160 was fabricated. The approximate mode shape, frequency and damping ratio of the mode are identified by the time history and phase of the signal. The modal test results and the buffeting characteristics in the turbulent flow field further verify the feasibility and reliability of the proposed design method. The research results can provide valuable reference for the aeroelastic model design and wind resistance research of similar bridges.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"264 ","pages":"Article 106152"},"PeriodicalIF":4.2,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331151","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":"Long-span bridge flutter analysis in non-stationary downburst-like flows by Floquet Theory","authors":"Luca Caracoglia","doi":"10.1016/j.jweia.2025.106138","DOIUrl":"10.1016/j.jweia.2025.106138","url":null,"abstract":"<div><div>This study examines the research question whether bridge flutter instability can be triggered by thunderstorm downburst-like flows. The Floquet Theory is used to formulate a new analytically-based model, in which the loads are simulated using a transient periodic mean wind speed. This feature imitates the touchdowns of subsequent downbursts in the proximity of the deck at a relative distance <span><math><mi>r</mi></math></span> corresponding to the maximum spatial intensification (equal to about <span><math><mrow><mi>r</mi><mo>/</mo><msub><mrow><mi>D</mi></mrow><mrow><mstyle><mi>d</mi><mi>b</mi></mstyle></mrow></msub><mo>=</mo><mn>1</mn><mo>.</mo><mn>0</mn></mrow></math></span> with <span><math><msub><mrow><mi>D</mi></mrow><mrow><mstyle><mi>d</mi><mi>b</mi></mstyle></mrow></msub></math></span> downburst horizontal core or “jet” diameter). The model accounts for the slow variations in the mean-wind flow velocity to evaluate flutter. Although this assumption may lead to a conservative estimation of the instability threshold, the study demonstrates that the critical flutter velocity is finite. Specifically, the model quantifies in closed form the minimum downburst intensity, i.e., the magnitude of the mean, horizontal along-wind velocity component, which causes the deck vibration to diverge. Two bridge models are used to illustrate the method: the Golden Gate Bridge and the Messina Strait Bridge (1992 design).</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"264 ","pages":"Article 106138"},"PeriodicalIF":4.2,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306417","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":"On enhancing anti-overturning performance of a high-speed train with side airfoils in crosswinds","authors":"Jiazheng Chen ,&nbsp;Ao Xu ,&nbsp;Tanghong Liu ,&nbsp;Guangjun Gao ,&nbsp;Jie Zhang","doi":"10.1016/j.jweia.2025.106151","DOIUrl":"10.1016/j.jweia.2025.106151","url":null,"abstract":"<div><div>The aerodynamic issue in crosswind has become a serious challenge for the operational safety and stability of high-speed trains (HSTs). It's urgent to find out a new strategy to enhance the anti-overturning performance of HSTs. This study proposed a new flow control design with side airfoils (SAs) installed on the leeward side (LWS) of HSTs to improve the vortex structure adjacent the train's leeward side. The results show that the SAs have a beneficial impact on the crosswind aerodynamic loads of the HST with the decrease in the lateral force and overturning moment. The SAs also disturb the airflow over the train top and bottom, and contribute to a large pressure difference, resulting in an extra lift force to resist the overturning moment. Consequently, for the HST, the lift force coefficient is increased by 16.39 %, while the lateral force and overturning moment coefficients are decreased by 5.71 % and 9.41 %, respectively. In addition, the SAs have a considerable influence on the aerodynamic performance of the head car. The lift force coefficient is increased by 39.47 %, while the overturning moment coefficient is reduced by 11.44 %. Therefore, the findings of this study confirm that the SAs can obviously enhance the anti-overturning performance of the HST, which provides a new design method for the next generation higher-speed train travelling in windy regions.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"264 ","pages":"Article 106151"},"PeriodicalIF":4.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291585","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}