Tunnelling and Underground Space Technology最新文献

{"title":"Attention-enhanced generative design of disc cutter layout for shield TBM considering multi-working conditions","authors":"Zhuang Xia ,&nbsp;Jiaqi Wang ,&nbsp;Yongsheng Li ,&nbsp;Limao Zhang","doi":"10.1016/j.tust.2025.107166","DOIUrl":"10.1016/j.tust.2025.107166","url":null,"abstract":"<div><div>The widespread application of Tunnel Boring Machines (TBMs) in composite strata and variable geological conditions poses significant challenges to the generalizability and robustness of cutter layout design. This paper introduces a robust generative design method for cutter layouts considering multi-working conditions, aiming to enhance excavation efficiency and safety in diverse geological settings. An attention-enhanced meta-model is trained using the dataset constructed via parametric dynamic analysis and subsequent post-processing. A multi-objective optimization (MOO) method, guided by a multi-condition evaluation, generates a Pareto optimal set, from which the optimal solution is selected using multi-attribute decision-making (MADM). A case study involving a TBM excavating through representative ground conditions validated the method’s feasibility, demonstrating 14.34 %, 33.71 %, and 2.63 % improvements across different working conditions while maintaining safety standards. This study contributes a generative design method integrating a graph attention meta-model and multi-condition evaluation strategy, and an efficient generative system based on a co-simulation platform.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107166"},"PeriodicalIF":7.4,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290044","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":"Three-dimensional interaction between shallow foundations and mechanized tunneling in soft ground: A case study of Tehran Metro Line 6, South Extension","authors":"Alireza Seghateh Mojtahedi ,&nbsp;Meysam Imani ,&nbsp;Ahmad Fahimifar","doi":"10.1016/j.tust.2025.107153","DOIUrl":"10.1016/j.tust.2025.107153","url":null,"abstract":"<div><div>In recent years, the effects of mechanized tunneling using Earth Pressure Balance Shield (EPBS) machines on existing surface structures have received increasing attention. However, limited studies have addressed the interaction between tunnel step-by-step advancement and the shallow foundations under realistic three-dimensional loading conditions. In this research, comprehensive three-dimensional finite element models were employed to investigate some important aspects of surface footings resting above a mechanized tunnel. The study focused on the ultimate bearing capacity under vertical and inclined loads; the failure envelope under combined vertical (<em>V</em>), horizontal (<em>H</em>), and bending moment (<em>M</em>) loads; the surface displacements; the influence of the tunnel embedment depth; the soil arching effects; and the loosened zone around the tunnel-footing system. A case study of Tehran Metro Line 6-Southern Extension (TML6-SE) was considered in which the EPBS cutterhead was considered at different distances to the surface footing. According to the results, when the cutterhead reached the beginning of the footing, the ultimate vertical bearing capacity was reduced by more than 45% compared to the no-tunnel scenario. As the cutterhead advanced beyond the footing, this reduction in the ultimate bearing capacity gradually diminished, eventually reaching only 3%. At the same relative position of the cutterhead to the footing, the maximum failure bending moment under combined loading also experienced a reduction of approximately 29.2%. Additionally, based on significant variations in the ratio of shear strain to failure shear strain, as a quantitative criterion, the soil was considered loosened within a zone extending approximately to 0.30<em>D</em> (<em>D</em>: tunnel diameter) above the tunnel crown. The bearing capacity of the surface footing was not affected when the tunnel depth exceeds approximately 2<em>D</em>. These findings offer valuable insights for the design, performance evaluation, and risk assessment of shallow foundations in urban tunneling environments.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107153"},"PeriodicalIF":7.4,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145315086","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":"Computational fluid dynamics analysis of the dust-reduction performance of a high-speed airflow negative pressure ejector spray device","authors":"Wen Nie ,&nbsp;Yifei Wang ,&nbsp;Fei Liu ,&nbsp;Jianguo Liu ,&nbsp;Huitian Peng ,&nbsp;Yifei Peng ,&nbsp;Guilin Liu ,&nbsp;Guangshuo Zhang","doi":"10.1016/j.tust.2025.107163","DOIUrl":"10.1016/j.tust.2025.107163","url":null,"abstract":"<div><div>To address the issue of poor dust suppression effects of traditional spray systems in high longwall mining faces, we propose a high-speed airflow negative pressure induction spray dust suppression technology based on the Coanda effect and negative pressure entrainment and have developed a corresponding device. Using computational fluid dynamics simulations, the airflow changes inside and outside the air amplifier, the spray distribution, and the effects of various parameters on droplet size distribution were analyzed under different supply air pressures. Experiments were then conducted, in which the air velocity at different positions of the air amplifier was measured, the fragmentation condition of the liquid film near the nozzle and the change in spray angle were observed, and the experimental results of spray concentration and droplet size were compared with the numerical simulation results to verify the reliability of the simulation. Finally, through dust suppression experiments, we determined that a supply air pressure of 0.2 MPa and a spray pressure of 6 MPa were the optimal dust suppression parameters, increasing the spray coverage area and dust suppression efficiency by 66.7 % and 29.8 %, respectively. This device provides an efficient solution for dust control in the coal industry.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107163"},"PeriodicalIF":7.4,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145315222","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":"ITA-AITES − BIM in tunnelling – Guideline for mechanised and conventional tunnels","authors":"Wolfgang Angerer ,&nbsp;Vojtěch Ernst Gall ,&nbsp;Jurij Karlovšek ,&nbsp;Wojciech Mleczko ,&nbsp;Florent Robert ,&nbsp;Jyrki Salmi ,&nbsp;Wolfgang Aldrian ,&nbsp;Philipp Dohmen ,&nbsp;Jacob Grasmick ,&nbsp;Anne Jacobs ,&nbsp;Jelena Ninic ,&nbsp;Michel Rives ,&nbsp;Zehao Ye","doi":"10.1016/j.tust.2025.106714","DOIUrl":"10.1016/j.tust.2025.106714","url":null,"abstract":"<div><div>This guideline has been initiated by the International Tunnelling Association (ITA) Working Group (WG) 22 to support BIM implementation in the tunnelling industry. It provides recommendations which are to be adapted according to the availability of corresponding best practice experiences for all Project parties in order to support the adoption of BIM within a tunnelling Project.</div><div>This guideline is intended to be used by all engineers and owners to provide a reference framework for the implementation of BIM for tunnel Projects. It focuses on the implementation of BIM for segmentally lined mechanically bored tunnels and conventional tunnels. This guideline primarily covers the implementation of heavy civil elements for a tunnel Project. For more general information concerning BIM and its use in underground construction, the reader is referred to more general guidelines such as The German Tunnelling Committee’s (DAUB’s) “Building and Operation of Underground Structures – BIM in Tunnelling” or similar documents as provided in Section 16.</div><div>Specific recommendations concerning the modelling of non-civil works, e.g., mechanical, electrical, automation, or control systems, or Project-specific internal structures, e.g., concrete infills, plenum walls, duct-banks, smoke ducts, etc. are not provided.</div><div>This guideline is not intended to contest Employer’s Information Requirements or local best practise. It is only intended to alleviate ambiguity that may exist due to general definitions in the Employer’s Information Requirements or provide reference to owners for the development of their Requirements.</div><div>It is expected that the BIM’s capabilities will continue to expand as new BIM technology is developed. This version of this guideline is, however, based on a review of current international practise of BIM in tunnelling. As such, this document is subject to updates in consequent versions.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 106714"},"PeriodicalIF":7.4,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145315118","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":"Assessing subway station flood risks with a resilience Framework: Combining weighting methods and two-dimensional cloud model","authors":"De-Sai Guo ,&nbsp;Xin-Xin Yang ,&nbsp;Jin-Chen Yang ,&nbsp;Huai-Na Wu ,&nbsp;Fan-Yan Meng ,&nbsp;Ren-Peng Chen","doi":"10.1016/j.tust.2025.107170","DOIUrl":"10.1016/j.tust.2025.107170","url":null,"abstract":"<div><div>This study proposes a resilience-based flood risk assessment framework for subway stations. Grounded in resilience theory, the TOSE-4Rs framework systematically identifies risk factors across Technical, Organizational, Social, and Economic dimensions, establishing a comprehensive evaluation index system. A combined weighting approach integrating Lagrange optimization, the C-OWA operator, and entropy weighting mitigates subjective or objective bias inherent in single methods. Addressing the probability and loss of flood disasters concurrently in the subway station, a two-dimensional cloud model quantifies assessment uncertainty and fuzziness. Risk levels are determined by comparing evaluation cloud maps against standard evaluation cloud map, with closeness degree validating result accuracy. The new method is applied to the flood risk analysis of 8 subway stations in the Changsha Subway, and the calculation results show that: (<em>i</em>) The result was consistent with the actual situation. And compared with the FAHP, which validates the applicability and accuracy of the employed methodology. (<em>ii</em>) Based on assessment results, corresponding flood control measures are put forward for subway stations with higher risk assessment levels. Therefore, this new method has high theoretical value and practical significance and can provide a reference for the flood risk assessment of subway stations in other engineering fields.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107170"},"PeriodicalIF":7.4,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145315117","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":"Investigation on the mechanical properties and support performance of styrene-acrylic emulsion-modified thin spray-on liners as skin support in underground engineering","authors":"Shuchen Li ,&nbsp;Yong Han ,&nbsp;Chao Yuan ,&nbsp;Xianda Feng ,&nbsp;Xiaotian Wang","doi":"10.1016/j.tust.2025.107165","DOIUrl":"10.1016/j.tust.2025.107165","url":null,"abstract":"<div><div>Thin spray-on liners (TSLs) are recognized as critical innovations in underground engineering, offering rapid-deployment skin support for diverse geotechnical applications. However, cement-based TSLs often suffer from brittleness and limited flexibility. This study investigated the effects of styrene‒acrylic emulsions (SAEs) on the mechanical properties, crack resistance and support performance of cement-based TSLs. Two SAEs with different styrene to butyl acrylate ratios were incorporated at varying contents (0–70 % by liquid mass) into the TSL mixture. A series of mechanical and microstructure tests, including tensile, compressive, flexural, and shear strength tests, XRD, SEM, and MIP, were conducted. The results revealed that both SAEs can enhance the deformation resistance of cement-based TSLs, with SAE1 demonstrating a more pronounced improvement effect. Moreover, both SAEs improved the tensile strength and flexural strength. SAE2 outperformed SAE1 in enhancing the tensile strength (peaking at 40 % SAE2 with 3.6300 MPa) and flexural strength (8.3789 MPa at 40 % SAE2). SAE1 decreased the compressive and shear strengths, whereas SAE2 increased the compressive strength and shear strength. Microstructural analysis showed that the polymer films formed by SAEs bridged the hydration products, densified the matrix, and improved the crack resistance. Moreover, the support performance of SAE-modified TSLs was evaluated through load-bearing compression tests on TSL-coated granite. The results showed that both SAE1- and SAE2-modified TSLs can improve the peak strength and strain of flawed granite. Compared with the uncoated specimens, the TSL-coated specimens showed higher total and elastic energies, but lower brittleness indices. This study provides critical insights into SAE-modified TSLs, offering practical guidelines for optimizing underground support systems.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107165"},"PeriodicalIF":7.4,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145315015","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":"Development and application of dynamic configuration and intelligent scheduling system for drilling and blasting tunnel construction equipment","authors":"Ronghua Wei ,&nbsp;Zhiqiang Zhang ,&nbsp;Kangjian Zhang ,&nbsp;Xiao Gou ,&nbsp;Xingyu Zhu","doi":"10.1016/j.tust.2025.107164","DOIUrl":"10.1016/j.tust.2025.107164","url":null,"abstract":"<div><div>Reasonable configuration and efficient scheduling of construction equipment is an important way to realize intelligent and automated construction of drilling and blasting tunnel. This study aims to develop a set of construction equipment management system to solve the current poor adaptability of tunnel construction equipment configuration and scheduling problems. On the one hand, an improved Astar multi-machine scheduling algorithm is proposed for the access characteristics of drilling and blasting tunnel construction equipment. Combined with the proposed two-dimensional percise positioning method of tunnel based on Ultra Wideband (UWB) and Time of Flight (TOF) fusion, the dynamic planning of equipment path can be realized. Based on the simulation and analysis of MATLAB software, it verifies the feasibility and high efficiency of this optimization algorithm for the dynamic planning of tunnel equipment path. On the other hand, a time–cost multi-objective optimization key equipment configuration model based on NSGA-II algorithm and entropy weight-TOPSIS decision-making has been established, and a set of equipment configuration method for the whole process of drilling and blasting tunnel construction has been formed, which comprehensively considers the tunnel section type, surrounding rock conditions, excavation mileage, construction progress requirements. Finally, the developed dynamic configuration and intelligent scheduling system of drilling and blasting tunnel equipment was applied to a railway tunnel project in China. Compared with the traditional construction, the connection time was reduced by 38.9%, the operation time was reduced by 19.7%, and the overall construction efficiency was increased by 21.5%, which demonstrates the significant value of the system for drilling and blasting tunnel project.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107164"},"PeriodicalIF":7.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261986","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":"Smoke bifurcation-induced low-temperature region in longitudinally ventilated tunnel fires: Phenomenon, modelling, and full-scale demonstration","authors":"Ke Wu ,&nbsp;Ganyu Wang ,&nbsp;Jiangdong Li ,&nbsp;Liming Jiang ,&nbsp;Guannan Wang ,&nbsp;Tianhang Zhang","doi":"10.1016/j.tust.2025.107147","DOIUrl":"10.1016/j.tust.2025.107147","url":null,"abstract":"<div><div>Understanding smoke behavior in tunnel fires is essential for designing effective smoke control and evacuation strategies. This study investigates the behavior of smoke spread and bifurcation in longitudinally ventilated tunnel fires through a combination of full-scale fire experiments and numerical simulations. The findings show that intense ventilation disrupts the continuity of the downstream smoke layer and triggers the smoke layer bifurcation. This process is characterized by a three-dimensional spiral vortex structure, involving both radial and longitudinal diffusion, driven by the combined effects of thermal buoyancy, inertial forces, and sidewall confinement. The smoke bifurcation leads to a redistribution of mass and heat within the smoke layer, forming a central low-temperature region beneath the tunnel ceiling. The range of the smoke layer expands with increasing tunnel aspect ratio and ventilation velocity but decreases with higher heat release rates. Finally, a theoretical model to estimate the length of low-temperature region is proposed and validated, accounting for the complex interactions between the Coanda effect, anti-buoyancy sidewall jets, and plume behavior. This work challenges the traditional one-dimensional smoke flow assumption and offers a new understanding of the complex three-dimensional nature of smoke transport in tunnel fires, providing a more robust foundation for tunnel ventilation design and emergency response planning.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107147"},"PeriodicalIF":7.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261985","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":"Machine learning-based optimization of foundation pit dewatering to reduce environmental impact","authors":"Xiao-Wei Li ,&nbsp;Ye-Shuang Xu","doi":"10.1016/j.tust.2025.107167","DOIUrl":"10.1016/j.tust.2025.107167","url":null,"abstract":"<div><div>Foundation pit dewatering that combines waterproof curtain and dewatering well is typically adopted to ensure safety in foundation pit engineering, resulting in groundwater level drawdown (Δ<em>H</em>) and ground settlement (Δ<em>s</em>) outside the foundation pit. The parameters of the waterproof curtain and dewatering must be optimized to reduce the value of Δ<em>H</em> and Δ<em>s</em>. Conventionally, numerical simulations are used for design optimization. However, a substantially long computation time is required to simulate a large number of working conditions. This paper proposes an evolutionary multi-layer neural network (EMNN)-based model that combines the differential evolution algorithm (DEA) and multi-layer neural network (MNN) to optimize the design of foundation pit dewatering, considering Δ<em>H</em> as the control target. Based on the foundation pit dewatering engineering database in Shanghai, an optimization scheme is developed using the EMNN for a dewatering case in Shanghai. Compared with the original scheme, the filter length (<em>L</em>) of the optimal scheme is reduced by 2 m and the vertical position relative to the waterproof curtain (<em>R_p</em>) decreased by 4 m, and Δ<em>H</em> at an observation well outside the pit (5 m away from the waterproof curtain) reduced by 0.08 m. Numerical simulations are employed to calculate Δ<em>s</em> due to dewatering. Compared with the original scheme, the maximum value of Δ<em>s</em> at the observation well outside the pit and the influence range of ground settlement outside the pit of the optimal scheme are simultaneously reduced.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107167"},"PeriodicalIF":7.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261967","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 multi-method risk assessment framework to enhancing the safety of urban underground private sewage treatment systems","authors":"Hee Eun Lee,&nbsp;Chankyu Kang","doi":"10.1016/j.tust.2025.107162","DOIUrl":"10.1016/j.tust.2025.107162","url":null,"abstract":"<div><div>Urban underground sewage systems present unique safety challenges due to confined spaces, accumulation of toxic gas, aging infrastructure, and insufficient operational oversight. Despite their increasing prevalence in dense metropolitan areas, systematic risk-evaluation methods tailored to these systems remain limited. This study proposes an integrated, three-step risk-assessment framework that combines 4 M analysis, Bow-Tie analysis, and a Hazard and Operability Study (HAZOP) to identify, visualize, and mitigate risk factors in private underground sewage treatment facilities. Quantitative analysis was carried out on 40 accident cases, and the framework was further validated using a separate real-life methane explosion that occurred in Seoul. Quantitative analysis using a 6 × 5 risk matrix revealed that major risks stemmed from environmental hazards and mechanical failure. The proposed framework eliminated all high- and medium–high-risk elements by redistributing them into lower-risk categories through the implementation of prevention and mitigation barriers. HAZOP analysis confirmed previously unidentified process-level deviations, enhancing the overall system robustness. The proposed methodology provides a structured and replicable approach for improving safety in urban underground infrastructures. It also supports proactive, data-driven risk management strategies that have been demonstrated as feasible in recent studies.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"168 ","pages":"Article 107162"},"PeriodicalIF":7.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261971","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}