Ocean Engineering最新文献_第2页

Vertical dynamic response of a pile in three-dimensional saturated soils considering construction disturbance

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-05 DOI: 10.1016/j.oceaneng.2025.121097

Chaofan Liu , Zhang-Long Chen , Yun Zhao , Jian-Ping Li , Wei Wang , Jiangtao Yi

{"title":"Vertical dynamic response of a pile in three-dimensional saturated soils considering construction disturbance","authors":"Chaofan Liu , Zhang-Long Chen , Yun Zhao , Jian-Ping Li , Wei Wang , Jiangtao Yi","doi":"10.1016/j.oceaneng.2025.121097","DOIUrl":"10.1016/j.oceaneng.2025.121097","url":null,"abstract":"<div><div>During pile installation, construction disturbances alter soil mechanical properties near the pile, significantly affecting the dynamic response of the pile. This paper develops a three-dimensional (3D) analytical model to investigate the vertical dynamic response (VDR) of a pile in radially inhomogeneous saturated soil. Firstly, by employing the separation variable method and incorporating the continuity and boundary conditions of the soil-pile system, the exact solution of the whole system in the frequency domain was derived. Subsequently, the time-domain velocity response under semi-sinusoidal vertical excitation is obtained using Fourier inverse transform and the convolution theorem. The accuracy and superiority of the proposed solution were validated through comparison with previous analytical solutions. Finally, the developed solution is then used to examine the impact of parameters of saturated soil and pile on the VDR of a pile. The results demonstrate that the proposed saturated model better captures the VDR of a pile in radially inhomogeneous saturated soil compared to the single-phase model. The VDR of a pile is significantly influenced by the pore water, porosity, disturbed degree and range of the saturated soil, as well as the elastic modulus of the pile.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 121097"},"PeriodicalIF":4.6,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777198","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

Investigation on the influence of the adjacent shoreline topography on harbor oscillations

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-05 DOI: 10.1016/j.oceaneng.2025.120961

Yujin Dong, Shixiao Fu, Bin Song, Leijian Song, Tongxiao Sun

{"title":"Investigation on the influence of the adjacent shoreline topography on harbor oscillations","authors":"Yujin Dong, Shixiao Fu, Bin Song, Leijian Song, Tongxiao Sun","doi":"10.1016/j.oceaneng.2025.120961","DOIUrl":"10.1016/j.oceaneng.2025.120961","url":null,"abstract":"<div><div>In the realm of harbor oscillation studies, low-frequency (1/500–1/30 Hz) oscillations are of particular concern. These oscillations have the potential to induce excessive motions in moored vessels, resulting in disruption of maritime docking and navigation, and even casualties. To address the operational challenges associated with low-frequency harbor oscillations, extensive numerical simulations are carried out in this study to explore the influence of adjacent shoreline topographies on long-wave-induced harbor oscillations. By integrating wave surface elevations in the time and frequency domains, wave energy distributions at various frequencies for harbors with different adjacent boundaries are identified. The spatial distribution features of the first four resonant modes are examined through an improved linear wave model. Then, the band-pass filtered surface elevations of a cross-section close to the dock for harbors with different layouts at various frequency bands are compared and analyzed utilizing the FUNWAVE-TVD wave model. The results indicate that the harbor with an adjacent slope boundary is safer than the harbor with a vertical revetment on the adjacent slope boundary in terms of low-frequency harbor oscillations. Finally, the impact of the incident significant wave height on infragravity waves inside the harbor under different adjacent boundary conditions is explored.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 120961"},"PeriodicalIF":4.6,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777197","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

Steady streaming in front of Jarlan-type perforated caisson breakwaters

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-05 DOI: 10.1016/j.oceaneng.2025.121075

Seyed Ramtin Mohammadi , Abbas Yeganeh-Bakhtiary

{"title":"Steady streaming in front of Jarlan-type perforated caisson breakwaters","authors":"Seyed Ramtin Mohammadi , Abbas Yeganeh-Bakhtiary","doi":"10.1016/j.oceaneng.2025.121075","DOIUrl":"10.1016/j.oceaneng.2025.121075","url":null,"abstract":"<div><div>This study numerically explores the impact of perforated walls on the steady streaming formation in front of Jarlan-type perforated caisson breakwaters (JTCBs). A two-dimensional VOF-RANS hydrodynamic model with the RNG turbulence closure was developed to simulate turbulence field near the caisson breakwaters. The model incorporated a specific wall geometry with horizontal slots to accurately represent a porosity of <em>e</em> = 20 %, for maximizing wave energy dissipation. The model predictions were validated against experimental data and analytical solutions for standing waves, showing excellent agreement. Key findings indicated that the steady streaming pattern in front of JTCBs is significantly altered from that of the vertical breakwaters. Specifically, the turbulence field near the perforated wall and destructive interference of reflected waves from the perforated and rear walls substantially modify the steady streaming pattern. A reduction in the reflection coefficient was associated with decreased steady streaming intensity indicated by smaller and fewer recirculating cells. Quantitatively, the JTCBs with <em>B</em>/<em>L</em> = 0.21 and 0.12 reduced the maximum near-bed horizontal velocity at the second wave node by approximately 48 % and 31 % respectively, relative to vertical breakwaters. These reductions suggest a distinct scour/deposition pattern in front of JTCBs and highlighting their potential advantages in coastal protection applications.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 121075"},"PeriodicalIF":4.6,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777200","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

A comparative life cycle assessment of three wave energy converters with an economic-environmental approach

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-05 DOI: 10.1016/j.oceaneng.2025.121080

Mohammad Hossein Jahangir , Mehrsasadat Tayebi , Sepideh Ghayour Najafabadi

{"title":"A comparative life cycle assessment of three wave energy converters with an economic-environmental approach","authors":"Mohammad Hossein Jahangir , Mehrsasadat Tayebi , Sepideh Ghayour Najafabadi","doi":"10.1016/j.oceaneng.2025.121080","DOIUrl":"10.1016/j.oceaneng.2025.121080","url":null,"abstract":"<div><div>This study evaluates the environmental and economic performance of three wave energy converters (WECs)—WaveStar, MegaRoller, and Pelamis—using life cycle assessment (LCA) in SimaPro and economic analysis in HOMER PRO. A new index, the Net Present Cost and Carbon Intensity Ratio (NPCCIR), is introduced to integrate financial and environmental factors, offering a more comprehensive decision-making tool. NPCCIR offers a valuable approach for selecting WECs that minimize both Net Present Cost (NPC) and carbon footprints. A sensitivity analysis was conducted to assess the impact of key variables, including steel recycling rates, transportation distances, maintenance schedules, and capital costs, on energy consumption, CO<sub>2</sub> emissions, and economic viability. The environmental sensitivity findings highlight that steel recycling rates significantly influence the outcomes. Economic sensitivity analysis revealed that WaveStar is the most sensitive to cost variations, with NPC reaching up to $25 million under high capital costs and loads, compared to around $6 million for MegaRoller and Pelamis. Results indicate that Pelamis had the lowest greenhouse gas emissions (21 g CO<sub>2</sub> eq/kWh) during its lifetime. The carbon payback time was 10.5 months for Pelamis and 22.5 months for MegaRoller and WaveStar. MegaRoller demonstrated the lowest NPC ($1.68 M) and NPCCIR (0.063), making it the most cost-effective choice.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 121080"},"PeriodicalIF":4.6,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777330","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

Auto-tuning of controller parameters based on a probabilistic dynamic model with application in boat path following

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-05 DOI: 10.1016/j.oceaneng.2025.121083

Kegang Zhao, Yuyuan Hao, Zhihao Liang

{"title":"Auto-tuning of controller parameters based on a probabilistic dynamic model with application in boat path following","authors":"Kegang Zhao, Yuyuan Hao, Zhihao Liang","doi":"10.1016/j.oceaneng.2025.121083","DOIUrl":"10.1016/j.oceaneng.2025.121083","url":null,"abstract":"<div><div>Tuning the parameters of controllers for intelligent boats poses a formidable challenge for engineers, demanding substantial time and effort. Traditionally, engineers rely heavily on their theoretical knowledge and professional expertise, coupled with trial-and-error approach, to fine-tune these settings. To alleviate this burden, this paper introduces an auto-tuning algorithm for boat path following controllers based on a probabilistic dynamic model. This algorithm adopts a model-based reinforcement learning paradigm, facilitating the autonomous calibration of controller parameters even with limited datasets. We use probabilistic ensemble method to construct the boat's probabilistic dynamic model which incorporates uncertainties in a principled manner, perform state propagation using particle-based methods, and optimize controller with particle swarm optimization. To validate the efficacy of our approach, we applied the proposed method to optimize two lateral controllers--a proportion-differentiation controller and a neural network controller--within the Gazebo simulation environment. The experimental outcomes underscore the high data efficiency of our method, demonstrating its ability to optimize controller parameters with minimal data requirements, thereby eliminating the need for manual expertise and time-intensive tuning procedures.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776264","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

Statistical spatial downscaling of significant wave height in a regional sea from the global ERA5 dataset

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-05 DOI: 10.1016/j.oceaneng.2025.121100

Bing Yuan, Marcel Ricker, Wei Chen, Benjamin Jacob, Nam Thanh Pham, Joanna Staneva

{"title":"Statistical spatial downscaling of significant wave height in a regional sea from the global ERA5 dataset","authors":"Bing Yuan, Marcel Ricker, Wei Chen, Benjamin Jacob, Nam Thanh Pham, Joanna Staneva","doi":"10.1016/j.oceaneng.2025.121100","DOIUrl":"10.1016/j.oceaneng.2025.121100","url":null,"abstract":"<div><div>Global wave datasets typically provide coarse spatial resolution, which is insufficient for detailed regional applications. Recently, neural networks have been used for fast downscaling of environmental fields, while their inherent randomness can induce prediction instability. This study aims to enhance the spatial resolution of significant wave height (SWH) in a regional sea by proposing an ensemble neural network and multivariate linear regression. Model performance is evaluated for both self-variable downscaling from low-resolution SWH and cross-variable downscaling from low-resolution wind fields. SWH and wind data from the global ERA5 dataset in the western Black Sea are used as the low-resolution input, and high-resolution SWH data from a regional model are used as the reference. The results indicate that both models perform well in self-variable SWH downscaling. In cross-variable downscaling, the ensemble model yields reasonable results, while linear regression gives significantly higher errors. The ensemble method effectively reduces the prediction instability of the base neural network, while linear regression can serve as a simple and efficient baseline for spatial downscaling in the self-variable approach. This work provides valuable insights into downscaling methodologies, which are crucial for improving spatial wave predictions and supporting diverse coastal applications.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 121100"},"PeriodicalIF":4.6,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777184","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}

引用次数: 0

A moving obstacle avoidance strategy-based collaborative formation for the bionic multi-underwater spherical robot control system

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-05 DOI: 10.1016/j.oceaneng.2025.121120

Ao Li , Shuxiang Guo , Chunying Li , He Yin , Meng Liu , Liwei Shi

{"title":"A moving obstacle avoidance strategy-based collaborative formation for the bionic multi-underwater spherical robot control system","authors":"Ao Li , Shuxiang Guo , Chunying Li , He Yin , Meng Liu , Liwei Shi","doi":"10.1016/j.oceaneng.2025.121120","DOIUrl":"10.1016/j.oceaneng.2025.121120","url":null,"abstract":"<div><div>The collaborative operation of multi-underwater robot formation is an effective way to deal with the complex underwater environment. A formation control strategy with high efficiency and accuracy in moving obstacle avoidance is very important. Based on the multi-robot experiment platform, a moving obstacle avoidance-constrained adaptive model predictive control (MOAC-AMPC) strategy is proposed for Underwater Spherical Robots (USRs). The strategy is optimized in two main aspects: Firstly, based on model predictive control, an adaptive weight matrix based on tracking error is designed to solve the tedious parameter tuning problem and reduce the tracking time. Then, the Velocity Obstacle (VO)-based dynamic constraints are designed to avoid multiple moving obstacles. Finally, the multi-underwater spherical robots experiment platform is built. Pool experiments are set up on the platform to verify the multi-robot formation with obstacles avoidance. The feasibility and superiority of the proposed strategy are verified by simulations and experiments. The application of the proposed multi-USRs strategy has certain practical value in multi-robot trajectory tracking and obstacle avoidance.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 121120"},"PeriodicalIF":4.6,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777199","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

Passive control of vortex breakdown on slender delta wing using control bump and cavity at low Reynolds number

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-05 DOI: 10.1016/j.oceaneng.2025.121086

Fardin J. Shojae , Mehdi Salehi , Mohammad Ja'fari , Artur J. Jaworski , Bahador Bakhtiari Nia

{"title":"Passive control of vortex breakdown on slender delta wing using control bump and cavity at low Reynolds number","authors":"Fardin J. Shojae , Mehdi Salehi , Mohammad Ja'fari , Artur J. Jaworski , Bahador Bakhtiari Nia","doi":"10.1016/j.oceaneng.2025.121086","DOIUrl":"10.1016/j.oceaneng.2025.121086","url":null,"abstract":"<div><div>Vortex breakdown and stall are frequent occurrence on delta wings which have prompted the development of various methods to improve stability and manoeuvrability of vehicles equipped with such wings. This study investigates an in-house developed slender delta wing modified with bump and cavity geometries, examined through Reynolds-averaged Navier-Stokes (RANS) method at a Reynolds number of <span><math><mrow><mn>1.4</mn><mo>×</mo><msup><mn>10</mn><mn>5</mn></msup></mrow></math></span>. The modifications were applied to the suction side of the wing to analyse their effects on vortex breakdown and flow morphology. Results indicate that the bump geometrical modification alters the streamline patterns, shifting the location and structure of vortex breakdown downstream and causing drag reduction of up to 20 % in certain configurations. Although these modifications don't significantly increase the lift force, they effectively reduce the drag force in certain configurations by relocating the breakdown formation further downstream and higher up above the wing surface. The reduction in the drag force by the bump modification leads to an improvement in the aerodynamic efficiency, which translates to a reduction in fuel consumption and greenhouse gas emissions. In comparison, the cavity modification causes the formation of a vortex trap area, which moves the vortex breakdown closer to the suction surface of the wing.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 121086"},"PeriodicalIF":4.6,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777201","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}

引用次数: 0

Numerical study on whipping response in irregular waves with asymmetric slamming for ultra large container ships

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-04 DOI: 10.1016/j.oceaneng.2025.120681

Lin Lu , Huilong Ren , Penghao Shan , Hui Li , Jian Zou , Zhiyong Sun

{"title":"Numerical study on whipping response in irregular waves with asymmetric slamming for ultra large container ships","authors":"Lin Lu , Huilong Ren , Penghao Shan , Hui Li , Jian Zou , Zhiyong Sun","doi":"10.1016/j.oceaneng.2025.120681","DOIUrl":"10.1016/j.oceaneng.2025.120681","url":null,"abstract":"<div><div>The occurrence of asymmetric slamming in oblique waves poses a challenge for ultra-large container ships, resulting in torsional and horizontal bending whipping. In this study, a 3D nonlinear time-domain hydroelastic analysis method considering asymmetric slamming is used to simulate the torsional and horizontal bending whipping of a 20,000 TEU container ship in oblique irregular waves. The irregular incident waves are described by the ISSC spectrum. The characteristics of torsional moments and horizontal bending moments in oblique irregular waves are discussed in detail. The load time histories, frequency spectra, time-frequency spectrums, and significant values are analyzed and it is revealed that the high-frequency components of torsional moment and horizontal bending moment exhibit randomness due to the unpredictable occurrence of large wave height components in irregular waves, leading to slamming and whipping responses of ships. Furthermore, the effects of ship speed, heading angle, significant wave height, wave mean period on the whipping response are analyzed through a comprehensive set of numerical simulations, as well as the characteristics of the bending and torsional moment along the ship.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 120681"},"PeriodicalIF":4.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768857","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

Grey wolf optimization enhanced collaborative path planning for UUV swarms

IF 4.6 2区工程技术

Ocean Engineering Pub Date : 2025-04-04 DOI: 10.1016/j.oceaneng.2025.121082

Heda Xu , Xiaojia Xiang , Chao Yan , Zixing Li , Han Zhou , Ning Wang

{"title":"Grey wolf optimization enhanced collaborative path planning for UUV swarms","authors":"Heda Xu , Xiaojia Xiang , Chao Yan , Zixing Li , Han Zhou , Ning Wang","doi":"10.1016/j.oceaneng.2025.121082","DOIUrl":"10.1016/j.oceaneng.2025.121082","url":null,"abstract":"<div><div>Path planning is critical for enabling efficient and collaborative operations in unmanned underwater vehicle (UUV) swarms, particularly in complex and dynamic underwater environments. This study proposes a novel three-dimensional (3D) collaborative path planning framework for UUV swarms, grounded in an advanced grey wolf optimization (GWO) algorithm. The framework integrates a comprehensive 3D model that incorporates kinematic constraints, threat avoidance, swarm collaboration, and path smoothness, tailored specifically for the complex dynamics of UUV swarms. By combining the global search mechanism of Cuckoo Search (CS) and the local refinement mechanism of a multi-population (MP) strategy, the proposed method achieves a robust balance between exploration and exploitation. Additionally, a nonlinear search strategy dynamically adjusts the convergence factor, further enhancing performance in complex 3D environments. Extensive experiments demonstrate that the proposed algorithm significantly improves convergence speed, solution quality, task completion time, and travel distance, highlighting its efficiency and practical applicability in UUV swarm applications.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"329 ","pages":"Article 121082"},"PeriodicalIF":4.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768855","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