Ocean Engineering最新文献_第7页

VFIFE-based refined recoil model for deepwater drilling riser emergency disconnection considering drill pipe-riser coupling effects 考虑钻杆-隔水管耦合效应的深水钻井隔水管应急断接精细化后力模型

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.oceaneng.2025.122298

Rui Li, Yanbin Wang, Deli Gao

{"title":"VFIFE-based refined recoil model for deepwater drilling riser emergency disconnection considering drill pipe-riser coupling effects","authors":"Rui Li, Yanbin Wang, Deli Gao","doi":"10.1016/j.oceaneng.2025.122298","DOIUrl":"10.1016/j.oceaneng.2025.122298","url":null,"abstract":"<div><div>During deepwater drilling operations, the emergency disconnection of marine risers involves sequential processes of drill pipe severance and riser disconnection, with limited research existing on the coupling effects between these two strings. To address this, a refined recoil model for emergency disconnection is developed based on the Vector Form Intrinsic Finite Element Method (VFIFE), incorporating critical factors including collision between strings, independent mud discharge processes, and non-Newtonian fluid characteristics of mud. The calculation method of external force based on VFIFE considering the drill pipe-riser coupling effects is described in detail, and the established model has been validated. Case studies and parameter sensitivity analyses reveal that: The presence of drill pipe reduces discharge speed in the annulus after riser disconnection, increasing the clearance between Lower Marine Riser Package (LMRP) and Blowout Preventer (BOP), thereby mitigating collision risks. Intense vibration of the drill pipe and pipe-riser collisions occur immediately after pipe severance, which are damped rapidly over time. Collision-induced transverse motion and bending of the drill pipe couple with the riser, generating minor high-frequency vibrations, while axial vibrations remain relatively independent Increased drill pipe self-weight and equivalent downhole tension suppress transverse displacement of riser throughout the emergency disconnection process.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122298"},"PeriodicalIF":4.6,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An integrated CREAM and Dempster–Shafer (D-S) evidence theory for improving human reliability in maritime search and rescue (SAR) 综合CREAM和D-S证据理论提高海上搜救人员可靠性

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.oceaneng.2025.122241

Sukru Ilke Sezer , Emre Akyuz

{"title":"An integrated CREAM and Dempster–Shafer (D-S) evidence theory for improving human reliability in maritime search and rescue (SAR)","authors":"Sukru Ilke Sezer , Emre Akyuz","doi":"10.1016/j.oceaneng.2025.122241","DOIUrl":"10.1016/j.oceaneng.2025.122241","url":null,"abstract":"<div><div>Human reliability plays a critical role in the success of the maritime Search and Rescue (SAR) operation, where decisions under time pressure and uncertainty may have life-saving implications. This article proposes an integrated conceptual framework combining the CREAM (Cognitive reliability and error analysis method) with the Dempster–Shafer (D-S) evidence theory to improve operational safety and human reliability in the SAR operation. Besides its robust theoretical background, the CREAM provides a structured approach to evaluate cognitive errors based on performance shaping factors (PSFs), whilst D-S theory offers a robust mathematical tool for handling uncertainty and synthesizing diverse sources of evidence. To demonstrate the capability of the proposed method to quantify human reliability, a simulated maritime SAR operation scenario is applied. The findings of the article show that the human reliability for the maritime SAR operation is 8.75E-01. Also, it reveals that the proposed approach provides more nuanced and reliable assessments compared to conventional CREAM, offering decision support for training, operational planning, and adaptive system design in SAR missions. This work contributes to the advancement of human-centered risk assessment methodologies in safety-critical maritime domains.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122241"},"PeriodicalIF":4.6,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the prevention and control of the casing shear failure in offshore oil and gas 海洋油气套管剪切破坏的防治研究

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.oceaneng.2025.122236

Changshuai Shi , Ao Wang , Xiaohua Zhu , Xinqi Wang

{"title":"Research on the prevention and control of the casing shear failure in offshore oil and gas","authors":"Changshuai Shi , Ao Wang , Xiaohua Zhu , Xinqi Wang","doi":"10.1016/j.oceaneng.2025.122236","DOIUrl":"10.1016/j.oceaneng.2025.122236","url":null,"abstract":"<div><div>During the offshore oil and gas extraction process, the integrity of the wellbore is difficult to ensure, which severely affects the efficient development of offshore oil and gas. Therefore, a new measure combining solid expandable tubular (SET) technology and flexible cement sheath has been proposed to prevent and control casing shear deformation. The effectiveness of the new measure was verified through the expansion test and shear resistance test. The three-dimensional finite element model of fault-rubber-SET-cement sheath-casing were established. The influence of different prevention and control combinations on casing shear deformation was analyzed. The results show that the prevention and control effect of the flexible cement sheath-SET-rubber ring combination is the best. The fault slip distance that the casing can resist has increased from 3 mm to 40 mm. The maximum strain of the casing has decreased by 94.19 %. The shape of the casing has changed from an “S”to an “I”, significantly reducing the deformation curvature of the casing. This new measure has remarkable prevention and control effects, relatively mature processes, and good prospects for engineering applications. The research results can provide certain references for the prevention and control of wellbore failures in offshore oil and gas development.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122236"},"PeriodicalIF":4.6,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fatigue performance prediction methodology for marine foam core sandwich composite structures based on progressive damage theory 基于递进损伤理论的船用泡沫芯夹层复合材料结构疲劳性能预测方法

IF 5.5 2区工程技术

Ocean Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.oceaneng.2025.122147

Yu Qiu , Renjun Yan , Jiajing Lei , Lin Xu , Wei Shen , Shuangxi Xu

{"title":"Fatigue performance prediction methodology for marine foam core sandwich composite structures based on progressive damage theory","authors":"Yu Qiu , Renjun Yan , Jiajing Lei , Lin Xu , Wei Shen , Shuangxi Xu","doi":"10.1016/j.oceaneng.2025.122147","DOIUrl":"10.1016/j.oceaneng.2025.122147","url":null,"abstract":"<div><div>With the wide application of marine foam sandwich composite structure, its fatigue performance has been paid more and more attention. Most fatigue life prediction models used at present are based on <em>S</em>-<em>N</em> experimental data. However, large-scale structural testing is expensive, and the generated prediction model is not universal. The existing numerical prediction methods for assessing the fatigue performance of composite structures are primarily applicable to laminates, and they do not account for the fatigue failure processes of foam core. Drawing on the progressive failure theory, this paper distinguishes different components of foam core sandwich composite structures, and puts forward fatigue life prediction models of different components for complex sandwich structures. Combining with finite element software ABAQUS, considering the stress change during fatigue load cycle, and taking Miner's theory as the final failure criterion, a subroutine for predicting fatigue performance of sandwich composite structures is compiled. A constant amplitude fatigue performance method for foam core sandwich composite structures considering different stress ratios is formed. The comparison of numerical prediction results and test results shows that the prediction accuracy of the numerical prediction method proposed in this paper is high, the logarithmic error between the predicted life and the test life is within 10 %, and the fatigue failure modes are consistent.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122147"},"PeriodicalIF":5.5,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy analysis of battery/PV-powered all-electric ship in various operational conditions 电池/光伏全电动船舶各种工况能量分析

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.oceaneng.2025.122257

Yijian Sang, Yu Ding, Congbiao Sui, La Xiang

{"title":"Energy analysis of battery/PV-powered all-electric ship in various operational conditions","authors":"Yijian Sang, Yu Ding, Congbiao Sui, La Xiang","doi":"10.1016/j.oceaneng.2025.122257","DOIUrl":"10.1016/j.oceaneng.2025.122257","url":null,"abstract":"<div><div>Electrification has emerged as a major development trend in the shipping industry, driven by increasingly stringent environmental protection regulations and advancements in power and electronic technologies. Powered exclusively by batteries and photovoltaic (PV) systems, all-electric vessels are environmentally friendly, provide zero emissions, and possess significant potential for widespread adoption in the inland shipping industry. Considering the variable environmental conditions involved in navigation and maneuvering the power demand of an all-electric ship varies continuously. An integrated simulation model has been developed to examine the energy consumption and performance of all-electric ships utilizing batteries and PV systems under fluctuating voyage conditions. This model includes the electrical system of the ship, photovoltaic generation system, electric propulsion system, hull forces, and ship motion Simulation results indicate that solely optimizing voyage parameters yields minimal energy savings for short distance electric ships. However, the photovoltaic generation system offers substantial energy-saving potential for inland vessels.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122257"},"PeriodicalIF":4.6,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic frequency behavior of hybrid offshore systems under stochastic variations 随机变化下海上混合动力系统的动态频率特性

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.oceaneng.2025.122232

Abdullah Kürşat Demi̇r , Can Elmar Balas

{"title":"Dynamic frequency behavior of hybrid offshore systems under stochastic variations","authors":"Abdullah Kürşat Demi̇r , Can Elmar Balas","doi":"10.1016/j.oceaneng.2025.122232","DOIUrl":"10.1016/j.oceaneng.2025.122232","url":null,"abstract":"<div><div>This study investigates the stochastic frequency behavior of hybrid offshore energy systems composed of a 5 MW wind turbine and a 2 MW hydrokinetic turbine. A Monte Carlo Simulation (MCS) framework with 10,000 iterations was developed to account for uncertainties in soil, material, and environmental parameters. Unlike conventional methods that assume fixed effective mass coefficients, this study models them as random variables to reflect the variability induced by operational loads. A two-degree-of-freedom (2DOF) formulation was proposed and validated against results from an ANSYS-based finite element model, with deviations remaining below 2.5 % across varying monopile thicknesses. Sensitivity analysis identified the force ratio (impact score: 0.9731) and the second effective mass coefficient (0.4261) as key contributors to frequency variation. Notably, only 19.91 % of simulations yielded frequencies within the safe operational range, indicating frequent operation outside resonance-safe zones. These findings underscore the necessity of including full-range operational loads in dynamic assessments—particularly for hybrid systems where turbine thrust asymmetry can cause dynamic imbalance. The proposed approach offers a reliable framework for frequency-based design under uncertainty and contributes to safer and more efficient offshore energy infrastructure.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122232"},"PeriodicalIF":4.6,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-layer adaptive predictive control for wave compensation of electro-hydraulic Stewart platforms 电液Stewart平台波动补偿的双层自适应预测控制

IF 5.5 2区工程技术

Ocean Engineering Pub Date : 2025-07-28 DOI: 10.1016/j.oceaneng.2025.122293

Xiafei Chen , Hai Zeng , Qing Gu , Zening Chen , Zhaoliang Meng , Lijie Zhang

{"title":"Dual-layer adaptive predictive control for wave compensation of electro-hydraulic Stewart platforms","authors":"Xiafei Chen , Hai Zeng , Qing Gu , Zening Chen , Zhaoliang Meng , Lijie Zhang","doi":"10.1016/j.oceaneng.2025.122293","DOIUrl":"10.1016/j.oceaneng.2025.122293","url":null,"abstract":"<div><div>A shipborne electro-hydraulic servo Stewart platform is used to counteract attitude disturbances of the hull or superstructure induced by ocean waves, thereby providing a stable operational environment for offshore activities. However, achieving high-precision wave compensation remains a significant challenge due to the time-varying characteristics of electro-hydraulic servo system parameters under different operating conditions, strong coupling among the platform's actuator channels, and the stochastic nature of vessel motion. To address these issues, this paper proposes a novel dual-layer online adaptive predictive control strategy. The proposed framework comprises an outer and an inner layer. The outer layer employs an adaptive model predictive control (MPC) scheme based on a linear parameter-varying (LPV) model to perform anticipatory planning and compensation for wave-induced platform motion. The inner layer utilizes a model reference adaptive control (MRAC) approach to control each hydraulic leg, enabling high-frequency tracking of the reference commands generated by the outer layer and enhancing adaptability to variations in the electro-hydraulic system parameters. Finally, comparative experiments under Sea State 4 conditions were conducted on the electro-hydraulic Stewart platform. The results demonstrate that, compared with conventional single-layer MPC approaches, the proposed dual-layer strategy significantly improves attitude compensation accuracy, dynamic response speed, system stability, and computational efficiency.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122293"},"PeriodicalIF":5.5,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seismic hydrodynamic effects and predictive modelling framework for submerged circular bridge piers 沉水圆形桥墩地震水动力效应及预测模型框架

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-07-27 DOI: 10.1016/j.oceaneng.2025.122263

Yu Chen , Xin Huang , Kun Wu , Zhong-Xian Li

{"title":"Seismic hydrodynamic effects and predictive modelling framework for submerged circular bridge piers","authors":"Yu Chen , Xin Huang , Kun Wu , Zhong-Xian Li","doi":"10.1016/j.oceaneng.2025.122263","DOIUrl":"10.1016/j.oceaneng.2025.122263","url":null,"abstract":"<div><div>Circular cross-section bridge piers are common in submerged construction due to their streamlined shape, reducing wave impact. Developing a simple and effective predictive model for seismic hydrodynamic effects is essential for seismic design. This study employs numerical simulations to analyse fluid–structure interactions (FSIs) of reinforced concrete piers, considering the height‒width ratio, water depth, diameter, hollow ratio, and superstructure mass. A predictive modelling framework was proposed to quantify seismic hydrodynamic effects on submerged circular cross-section bridge piers. Results indicate that increases in the water depth, diameter, and hollow ratio increase the displacement, bending moment, and shear force. The shear force increases by 81 % when water depth equals pier height with a 3.0 m diameter and a hollow ratio of 0.64. The diameter has less influence than the water depth and hollow ratio. The effects range from 50 % to 80 % as the diameter increases from 1.0 to 3.0 m at a height‒width ratio of 10. Additionally, a higher superstructure mass reduces the hydrodynamic effects from 80 % to 30 % when the superstructure-to-pier mass ratio increases from 0.0 to 1.0. The proposed predictive model estimates hydrodynamic amplification within 10 % accuracy of full FSI simulations, simplifying seismic analysis and supporting safe submerged bridge designs.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122263"},"PeriodicalIF":4.6,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Event-triggered robust MPC for underactuated ships path following with roll constraint 带有侧滚约束的欠驱动船舶路径跟踪的事件触发鲁棒MPC

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-07-27 DOI: 10.1016/j.oceaneng.2025.122247

Quansheng Wang, Zhiquan Liu

{"title":"Event-triggered robust MPC for underactuated ships path following with roll constraint","authors":"Quansheng Wang, Zhiquan Liu","doi":"10.1016/j.oceaneng.2025.122247","DOIUrl":"10.1016/j.oceaneng.2025.122247","url":null,"abstract":"<div><div>This study proposes a novel path following control strategy for underactuated ships to address roll instability, actuator wear, and path following inaccuracy. The method integrates adaptive line-of-sight (ALOS) guidance, a finite-time extended state observer (FTESO), and event-triggered robust model predictive control (ET-RMPC). ALOS dynamically adjusts the acceptable radius at waypoints, enhancing maneuverability. The FTESO estimates ship motion states and unknown disturbances, while a radial basis function neural network (RBFNN) compensates the effect of sideslip angle. The ET-RMPC controller incorporates input and roll constraints, along with infinite time domain performance indices, into an optimization framework reformulated as a convex problem using linear matrix inequalities. An event-triggered mechanism is introduced to mitigate actuator wear. Compared with conventional RMPC, the proposed method has a 45.45 % reduction in roll and a 45.57 % reduction in communication efficiency. Lyapunov stability and homogeneity theories guarantee closed-loop stable and finite-time convergence. Simulation results demonstrate the proposed method’s effectiveness and robustness.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122247"},"PeriodicalIF":4.6,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data-driven Bayesian Network model for detecting fire safety non-conformities in detained ships under port state controls 基于数据驱动的贝叶斯网络模型的港口国管制下被扣押船舶消防安全不合格检测

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-07-26 DOI: 10.1016/j.oceaneng.2025.122249

Bunyamin Kamal , Coskan Sevgili

{"title":"Data-driven Bayesian Network model for detecting fire safety non-conformities in detained ships under port state controls","authors":"Bunyamin Kamal , Coskan Sevgili","doi":"10.1016/j.oceaneng.2025.122249","DOIUrl":"10.1016/j.oceaneng.2025.122249","url":null,"abstract":"<div><div>A shipboard fire can have a catastrophic impact on the marine environments in addition to posing a risk to the ship and its crew. In preventing fire occurrence on board ships, it is crucial to investigate the influential factors that lead to fire safety deficiency code-related detention of ships since fire safety deficiency code appear as the most frequent detention in ship inspections. For this purpose, this paper discloses and assesses the correlation of various influential factors and deficiency types and their impact on detention incidence that stems from fire safety deficiency under the port state controls. In this respect, this paper develops a data-driven Bayes network model approach utilizing 4541 PSC reports of Tokyo Mou performed between 2017 and 2023. Thus, one of the most widely used and high-performance data-driven Bayesian Network algorithms, Tree Augmented Naive Bayes (TAN) is employed. Findings of the research indicate that Singapore and Hong Kong as port states have the highest impact on the explanation of detention caused by fire safety deficiency. The outcomes of the paper may provide port authorities, ship operating firms, and other industry stakeholders an effective scheme in establishing priorities and developing policies for mitigating the risk of detention.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"340 ","pages":"Article 122249"},"PeriodicalIF":4.6,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0