Ain Shams Engineering Journal最新文献

{"title":"Spatial knowledge acquisition in GPS vs. non-GPS navigation: A case study of Madinaty City, Egypt","authors":"Reem Al-srogy,&nbsp;Manal Abou El-Ela,&nbsp;Mohamed Al-Sherbiny","doi":"10.1016/j.asej.2025.103415","DOIUrl":"10.1016/j.asej.2025.103415","url":null,"abstract":"<div><div>The widespread use of GPS applications has significantly enhanced urban navigation. However, their impact on cognitive perception and recall of urban features is increasingly questioned. This study explores the effectiveness of GPS-based navigation versus direct wayfinding (non-GPS) in acquiring spatial knowledge. The theoretical part reviews the fundamental concepts and key findings of previous studies, while the case study presents an experimental investigation conducted in Madinaty city in Egypt. Thirty-six participants were divided into two groups: GPS and non-GPS. Each participant navigated seven paths to locate five specific destinations. The results showed that GPS users demonstrated lower path recognition and weaker landmark identification compared to those who navigated without technological assistance. These findings suggest that reliance on GPS may impede the development of spatial and landmark knowledge, as users tend to focus on the prescribed GPS route rather than engaging with real-world urban features.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103415"},"PeriodicalIF":6.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864521","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":"Advancing durability in the energy sector: Novel high-temperature resistant coatings and their challenges","authors":"Ali Akbar Firoozi ,&nbsp;Ali Asghar Firoozi ,&nbsp;Taoufik Saidani","doi":"10.1016/j.asej.2025.103431","DOIUrl":"10.1016/j.asej.2025.103431","url":null,"abstract":"<div><div>In the burgeoning energy sector, the deployment of high-temperature resistant coatings is crucial for enhancing the durability and efficiency of components operating under extreme conditions. This research delves into an array of innovative coating materials—ceramics, composites, and metallic alloys—and examines their application through state-of-the-art deposition techniques, including thermal spraying, physical vapor deposition (PVD), and chemical vapor deposition (CVD). Through a synthesis of experimental data and computational modeling (thermodynamic and kinetic modeling, finite element analysis, and molecular dynamics simulations), this study evaluates the coatings’ performance in harsh environments. The findings reveal significant improvements in component longevity and functionality; however, issues related to cost-effectiveness, scalability, and environmental impacts are identified. The study highlights the potential of nanostructured materials and green manufacturing processes as viable solutions to these challenges, advocating for their adoption to ensure scalability and sustainability in future applications. This research underscores the essential role of advanced coatings in meeting the energy sector’s rigorous demands and sets the stage for integrating more sustainable practices into the field’s progression.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103431"},"PeriodicalIF":6.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864523","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":"Free end drop for measuring flow rate in striped sides triangular channels","authors":"Bahzad Mohammad Ali Noori ,&nbsp;Karzan Abdullah Muhsin","doi":"10.1016/j.asej.2025.103421","DOIUrl":"10.1016/j.asej.2025.103421","url":null,"abstract":"<div><div>Free end water drop in striped sides triangular channels has been used as a tool for measuring end depth flow rate with its practical applications in triangular trenches. The current study’s laboratory work includes testing twelve channel models with striped sides in which strips have 1 cm x 1 cm square cross sections arranged in seven patterns of strips concentrations h_s/L_s ranging from 1/128 to 1/2 for various side slopes Z_T and channel slopes S_T. Five hundred fifty-four experiments are performed on the channel models covering a wide range of Froude numbers. It is important to note that roughness coefficient n_T achieves its maximum value at strips concentration = 1/8 across all channel slopes. Curves of the end drop discharge (EDD) are presented for varied channel’s side slopes and bed slopes at h_s/L_s = 1/8. Ratio of end drop water depth D_e to critical depth D_c (EDR) demonstrated straight line correlations. D_e/D_c grows as h_s/L_s decreases, reaching a maximum value at h_s/L_s = 1/8. Variations of D_e with uniform depth D_n yielded straight line connections. A quadratic equation was found to exist between D_e/D_c and S_T/n_T with determination coefficient R² = 0.997. An empirical correlation for the fluctuation of dimensionless discharge in terms of D_e/D_c and S_T/n_T is obtained for different channel side slopes, channel bed slopes, h_s/L_s = 1/8, and a Froude number range of 0.39 to 0.87. Two empirical approaches are proposed for predicting flow rate in striped sides triangular channels.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103421"},"PeriodicalIF":6.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864522","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":"Evaluating heat transfer and pressure drop in circular multiple impingement jets using hybrid nanofluids","authors":"Raheem K. Ajeel ,&nbsp;Saba N. Fayyadh ,&nbsp;Hayder Kareem Talla ,&nbsp;Sakhr M. Sultan ,&nbsp;C.P. Tso","doi":"10.1016/j.asej.2025.103413","DOIUrl":"10.1016/j.asej.2025.103413","url":null,"abstract":"<div><div>Utilisation of multiple impingement jet cooling structures is a prevalent practise in various industrial applications, including gas turbine engines, with the primary objective of augmenting heat transfer. The numerical procedure entails using Computational Fluid Dynamics (CFD) techniques to simulate the flow and heat transfer characteristics within the impingement region. The governing equations for fluid flow and the heat transfer are discretized using finite volume method on a structured grid. The turbulence effects were represented using SST k-omega model. Al₂O_3-Cu / water with different volume fractions (<span><math><msub><mi>φ</mi><mrow><mi>hnf</mi></mrow></msub></math></span>) such as 0.1 %, 0.33 %, 0.75 %, and 1.0 % are employed as a working fluid. The purpose of the study is to clarify the impact of the jet angle (β), the jet Reynolds number (Re), extended jet height <span><math><msub><mrow><mo>(</mo><mi>E</mi></mrow><mi>j</mi></msub></math></span>), and different volume fraction (<span><math><msub><mi>φ</mi><mrow><mi>hnf</mi></mrow></msub></math></span>) on the heat transfer behaviours of the curved target surface. The jet Reynolds number varies from 8,000 to 24,000, and five different jet angles (β = 15 <span><math><msup><mrow><mspace></mspace></mrow><mo>°</mo></msup></math></span>, 30°, 45°, 60°, 90 <span><math><msup><mrow><mspace></mspace></mrow><mo>°</mo></msup></math></span>) and three extended jet heights<span><math><msub><mrow><mo>(</mo><mi>E</mi></mrow><mi>j</mi></msub></math></span> = 0.2H, 0.4H, and 0.6H) are adopted. Within the range of studied parameters, the maximum Nusselt number occurs at the highest value of <span><math><msub><mi>φ</mi><mrow><mi>hnf</mi></mrow></msub></math></span> at all values of Re. The heat transfer rate and pressure drop of the system are enhanced significantly by the highest values of Re and <span><math><msub><mi>φ</mi><mrow><mi>hnf</mi></mrow></msub></math></span>. For all jet angle and Reynolds number, the heat transfer rate of binary hybrid nanofluids improve with the increase of volume fraction. The angle of jet, 45°, in this study gives a higher Nusselt number than other jet angles and the maximum is 29 %. Placing axial jet at a height less than maximum Nusselt number of a 90° extended jet will enhance heat transfer rate in comparison with other methods, while simultaneously, increases pressure drop.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103413"},"PeriodicalIF":6.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864520","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":"Thermoelastic behavior of infinite porous media with voids subjected to instantaneous heat Sources: A Spatio-Temporal nonlocal and fractional heat transfer approach","authors":"Kareem Alanazi ,&nbsp;Ahmed E. Abouelregal","doi":"10.1016/j.asej.2025.103377","DOIUrl":"10.1016/j.asej.2025.103377","url":null,"abstract":"<div><div>This paper presents a novel nonlocal thermoelastic model designed to capture the behavior of porous materials containing voids, effectively addressing the limitations of prior thermoelastic frameworks. The enhanced dual-phase lag (DPL) thermoelastic theory is extended by integrating the Rabotnov fractional differential operator, providing a more accurate representation of equations involving memory effects and nonlocal interactions. Additionally, a poro-thermoelastic model is formulated to account for both spatial and temporal nonlocal effects, enabling the analysis of microscale phenomena and memory-dependent behaviors in porous structures. This advanced mathematical framework offers a more refined and accurate depiction of the dynamic thermomechanical responses of elastic materials with voids. The proposed model is subsequently employed to investigate transient wave propagation in an infinite thermoelastic porous medium containing voids, subjected to time-dependent instantaneous heat supply distributed over the free surface area. To derive the solution in the transformed domain, the Laplace transform method is combined with the eigenvalue approach. Numerical results are presented for specific cases, providing a clear visual representation of the outcomes, which are analyzed in depth. Additionally, various scenarios are compared to enable a thorough evaluation of the results. These comparisons offer valuable insights into the system’s behavior under different conditions.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103377"},"PeriodicalIF":6.0,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143851810","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":"Cylindrical protuberance’s effect on supersonic jet’s flow control: Unveiling protuberance penetration and position on jet deflection through comprehensive turbulence simulation","authors":"Mohammad Hojaji ,&nbsp;Mohammad Eydizadeh ,&nbsp;Mohammadreza Soufivand ,&nbsp;Annunziata D’Orazio ,&nbsp;Sayed Ali Hosseini ,&nbsp;Arash Karimipour ,&nbsp;Aliakbar Karimipour","doi":"10.1016/j.asej.2025.103399","DOIUrl":"10.1016/j.asej.2025.103399","url":null,"abstract":"<div><div>Thrust vector control (TVC) through exhaust gas deflection is crucial for enhancing maneuverability, especially when aerodynamic control surfaces are ineffective. This study numerically investigates the influence of a cylindrical protuberance on the thrust vectoring of a supersonic jet as a passive, efficient TVC method. The effects of Nozzle Pressure Ratio (NPR), protuberance position, and penetration ratio on the nozzle exit flow, shock structure, and thrust deflection angle are analyzed. A convergent-divergent (C-D) nozzle is designed for a nominal Mach number of 2, and the three-dimensional, steady, compressible Navier-Stokes equations are solved using the SST k-ω turbulence model. Results reveal that protuberance-induced shocks and shock-wave/boundary-layer interaction significantly alter the flow structure and thrust deviation. The optimal protuberance position is found at 90 % of the divergent section length (X_p/L = 0.9), where increasing the penetration ratio (H/D*) up to 0.22 yields a maximum thrust deflection angle of 8.1°. Additionally, higher penetration ratios generate stronger vortical structures, which, at H/D* = 0.2, become more prominent and susceptible to downstream jet-fin interactions. The thrust vector deflection exhibits a near-linear relationship with the penetration ratio, with thrust losses reaching up to 6.5 % at maximum penetration. These findings provide valuable insights into shock-vector control mechanisms, offering a benchmark for future aerospace propulsion studies and enabling the development of advanced TVC systems for high-speed applications.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103399"},"PeriodicalIF":6.0,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848507","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":"Recent advancements in biomimetic application in underwater glider development: Current opportunities and future trends","authors":"Gazi Arman Hossain,&nbsp;Nayem Zaman Saimoon,&nbsp;Md. Nazmus Salehin,&nbsp;Mim Mashrur Ahmed,&nbsp;Mahadi Hasan Masud","doi":"10.1016/j.asej.2025.103410","DOIUrl":"10.1016/j.asej.2025.103410","url":null,"abstract":"<div><div>The underwater gliders (UWGs) have emerged as an attractive tool for oceanographic exploration, and marine and aquatic research because of their reduced energy consumption, lower operational noise levels, and extended operational ranges compared to conventional autonomous underwater vehicles (AUVs). This research sheds light on the recent advancements and challenges in biomimetic UWG designs, which are aimed to enhance performance through inspiration from biological lifeforms. Despite reaching an operational depth of up to 11 km, current UWG technologies still face numerous limitations as the fields of UWG applications nowadays require special adaptations as per specific conditions that revolve around better manoeuvrability, higher speed, and operational variability. This review highlights various biomimetic strategies, such as dolphin-inspired flappers and manta ray-like propulsion systems, which offer promising solutions to the challenges. A bibliometric analysis underscores a growing research interest in UWG technology in past decades. Yet, it reveals a substantial gap in biomimetic application studies regarding the limiting issues, suggesting a need for intensified research efforts. Future trends indicate the need to shift the research and investigations towards more hydrodynamically efficient designs, integrating advanced control systems to overcome existing limitations and enhance the utility of the UWGs in adverse underwater environments and challenges.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103410"},"PeriodicalIF":6.0,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850334","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":"Integrated energy management and harmonic mitigation in a microgrid using sea gull-ANN MPPT and advanced multi-level inverter","authors":"Vijaykumar G ,&nbsp;GeethaV","doi":"10.1016/j.asej.2025.103397","DOIUrl":"10.1016/j.asej.2025.103397","url":null,"abstract":"<div><div>In the relentless quest for sustainable energy solutions on a global scale, a dynamic surge of research and innovation has been ignited within the domain of micro-grid systems. This research introduces a self-contained micro-grid system that seamlessly integrates a Solar Photovoltaic (PV) source with an emphasis on achieving effective management. The proposed approach exploits a novel Hybridized Seagull Optimization Algorithm (SOA) in conjunction with an Artificial Neural Network (ANN) for Maximum Power Point Tracking (MPPT). This hybridized approach ensures more accurate and faster tracking thereby achieving a highly adaptive and efficient mechanism. The SOA-ANN strategy is implemented through a high-gain Single-Ended Primary Inductor Converter (SEPIC)-Cuk converter, enabling efficient extraction with improved power transfer. A surplus energy management mechanism directs excess energy from hybrid sources towards battery charging when it exceeds load requirements. Harmonics mitigation is addressed by channeling DC power from the converter into an advanced Reduced Switch 11-Level Multi-Level Inverter (MLI) incorporating a switched capacitor topology for boosting and self-voltage balancing. Particle Swarm Optimized Proportional Integral (PSO-PI) controller with Sinusoidal Pulse Width Modulation (SPWM) meticulously controls the inverter, ensuring elimination of undesirable harmonics. The resulting controlled AC power, passed through an LC filter, facilitates seamless grid synchronization with a substantial reduction in harmonics. MATLAB validation demonstrate the enhanced performance of strategies and components in optimizing energy extraction, regulation, and overall system efficiency. Overall, the combination of the hybrid MPPT with advanced converter and inverter topologies offer efficient energy management with improved adaptability and power quality.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103397"},"PeriodicalIF":6.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytical solution of Boltzmann-Maxwell PDE for plasma Couette flow among two coaxial rotating cylinders: Novel velocity dependent enhanced collision frequency","authors":"Zaki Mrzog Alaofi ,&nbsp;Taha Zakaraia Abdel Wahid","doi":"10.1016/j.asej.2025.103392","DOIUrl":"10.1016/j.asej.2025.103392","url":null,"abstract":"<div><div>Unfortunately, research on micro-scale computational models in plasma is relatively scarce and related to other mathematical representations. All modern technologies, including quantum computers, nanotechnology, microtechnology, and other essential minuscule-scale applications, are linked to the microscopic domains. The main goal of this study is to use math to look at a small-scale framework of Boltzmann-Maxwell partial differential equations (PDE) that describe plasma flow with a new collision frequency that depends on velocity. This study mostly looks at the Couette flow of Argon plasma that is bound between two rigid circular cylinders that rotate in the same direction. We can resolve the Boltzmann-Maxwell PDE structure by using small parameters along with Lee’s moments’ technique and a two-stream electron velocity distribution function (VDF). An analytical solution is obtained for nonlinear, non-homogeneous PDE in cylindrical coordinates. We are considering laboratory argon plasma as a significant commercial-industrial application. This study examines the impact of electrons’ velocity-dependent growth collision frequency (VDCF) for the first time, a factor overlooked in comparable research for simplification. With the new techniques, research projects will be more successful, especially those that use micro- and nano-electromechanical systems. The relationships among the different plasma variables are examined.</div><div>The irreversible thermodynamic properties of the complete system are delineated. The structure seeks to achieve equilibrium within a timescale that aligns with Le Chatelier’s premise. We accomplished that; we precisely determined the system’s equilibrium time, designated as (<span><math><mrow><msub><mi>t</mi><mrow><mi>e</mi><mi>q</mi><mi>u</mi></mrow></msub><mo>≅</mo><mn>2.01</mn></mrow></math></span>). We conclude that our pattern is consistent with Boltzmann’s H-theorem, the second rule of NIT, Le Chatelier’s rule, and the Onsager-Casimir reciprocity relation (OCRR). We presented the various contributions to the Internal Energy Change (IEC). We think the change in the system’s IEC related to entropy variability is the most important thing compared to looking at electric and magnetic fields since both electromagnetic fields are self-consistent. We thoroughly compare our new pattern and our previous velocity-independent collision frequency approach. The importance of this search arises from its extensive applications across multiple domains, including plasma physics, electrical engineering, medicine, and biological systems.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103392"},"PeriodicalIF":6.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842606","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 review on corrosion modelling for submarine pipeline","authors":"Ziheng Zhao,&nbsp;Mohammad Nishat Akhtar,&nbsp;Elmi Abu Bakar,&nbsp;Norizham Bin Abdul Razak","doi":"10.1016/j.asej.2025.103411","DOIUrl":"10.1016/j.asej.2025.103411","url":null,"abstract":"<div><div>Undersea pipelines are susceptible to corrosion, leading to resource loss and significant harm to the natural ecosystem. Hence, it is necessary to construct a corrosion model for detection and maintenance. This research primarily examines the existing literature on data-driven models utilising Machine Learning (ML) methods, particularly Artificial Neural Networks (NN’s) and also considers the models based on other theories to provide references for corrosion models. An initial stage involves analysing the main cause of corrosion and identifying the key factors contributing to this structural failure. Then, the review highlights the benefits of ML by listing their composition and current applications. Furthermore, the article analyses corrosion modelling using other methods and examines the potential avenues for optimisation that may provide to ML. Additionally, it considers the cost aspect and provides potential methods and suggestions for reducing costs. This review can serve as a valuable reference for researchers studying corrosive pipeline<!--> <!-->modelling.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103411"},"PeriodicalIF":6.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842843","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}