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  • Open Access

    ARTICLE

    Thermal Performance Analysis of Shell and Tube Heat Exchanger Using Hybrid Nanofluids Based on Al2O3, TiO2, and ZnO Nanoparticles

    Ans Ahmed Memon1, Laveet Kumar1,2,*, Abdul Ghafoor Memon1, Khanji Harijan1, Ahmad K. Sleiti2

    Frontiers in Heat and Mass Transfer, Vol.23, No.3, pp. 833-856, 2025, DOI:10.32604/fhmt.2025.064805 - 30 June 2025

    Abstract Climate change, rising fuel prices, and fuel security are some challenges that have emerged and have grown worldwide. Therefore, to overcome these obstacles, highly efficient thermodynamic devices and heat recovery systems must be introduced. According to reports, much industrial waste heat is lost as flue gas from boilers, heating plants, etc. The primary objective of this study is to investigate and compare unary (Al2O3) thermodynamically, binary with three different combinations of nanoparticles namely (Al2O3 + TiO2, TiO2 + ZnO, Al2O3 + ZnO) and ternary (Al2O3 + TiO2 + ZnO) as a heat transfer fluid. Initially, three different types of… More > Graphic Abstract

    Thermal Performance Analysis of Shell and Tube Heat Exchanger Using Hybrid Nanofluids Based on Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub>, and ZnO Nanoparticles

  • Open Access

    ARTICLE

    The Study of Long-Term Trading Revenue Distribution Models in Wind-Photovoltaic-Thermal Complementary Systems Based on the Improved Shapley Value Method

    Dongfeng Yang, Ruirui Zhang, Chuang Liu*, Guoliang Bian

    Energy Engineering, Vol.122, No.7, pp. 2673-2694, 2025, DOI:10.32604/ee.2025.062154 - 27 June 2025

    Abstract Under the current long-term electricity market mechanism, new energy and thermal power face issues such as deviation assessment and compression of generation space. The profitability of market players is limited. Simultaneously, the cooperation model among various energy sources will have a direct impact on the alliance’s revenue and the equity of income distribution within the alliance. Therefore, integrating new energy with thermal power units into an integrated multi-energy complementary system to participate in the long-term electricity market holds significant potential. To simulate and evaluate the benefits and internal distribution methods of a multi-energy complementary system… More >

  • Open Access

    MINI REVIEW

    Review of techniques and approaches for ectopic reservoir placement in inflatable penile implant

    Etan Eigner1,*, Yacov Reisman2, Nicola Fazza1, Ameer Nsair1, Valentin Shabataev1, Ariel Zisman1

    Canadian Journal of Urology, Vol.32, No.3, pp. 229-235, 2025, DOI:10.32604/cju.2025.063332 - 27 June 2025

    Abstract Inflatable penile prosthesis (IPP) implantation is the gold standard treatment for patients with erectile dysfunction who are refractory to medical therapy. The standard placement of the reservoir in the space of Retzius (SOR) may be contraindicated in patients with prior pelvic or abdominal surgery due to altered anatomy and increased risk of complications. This has led to the development of alternative ectopic reservoir placement techniques. In this narrative review, we summarize the literature on various ectopic reservoir approaches, including low and high submuscular placements, submuscular techniques with counter incisions or transfascial fixation, midline submuscular placement, More >

  • Open Access

    REVIEW

    Performance Enhancement of Chitosan for Food Packaging: Impact of Additives and Nanotechnology

    Panji Setya Utama Putra1, Damar Rastri Adhika2,3,*, Lia Amelia Tresna Wulan Asri4, Suprijadi Suprijadi3,5

    Journal of Renewable Materials, Vol.13, No.6, pp. 1043-1070, 2025, DOI:10.32604/jrm.2025.02024-0002 - 23 June 2025

    Abstract The continuous increase in petroleum-based plastic food packaging has led to numerous environmental concerns. One effort to reduce the use of plastic packaging in food is through preservation using biopolymer-based packaging. Among the many types of biopolymers, chitosan is widely used and researched due to its non-toxic, antimicrobial, and antifungal properties. Chitosan is widely available since it is a compound extracted from seafood waste, especially shrimps and crabs. The biodegradability and biocompatibility of chitosan also showed good potential for various applications. These characteristics and properties make chitosan an attractive biopolymer to be implemented as food… More > Graphic Abstract

    Performance Enhancement of Chitosan for Food Packaging: Impact of Additives and Nanotechnology

  • Open Access

    ARTICLE

    Intelligent Scheduling of Virtual Power Plants Based on Deep Reinforcement Learning

    Shaowei He, Wenchao Cui*, Gang Li, Hairun Xu, Xiang Chen, Yu Tai

    CMC-Computers, Materials & Continua, Vol.84, No.1, pp. 861-886, 2025, DOI:10.32604/cmc.2025.063979 - 09 June 2025

    Abstract The Virtual Power Plant (VPP), as an innovative power management architecture, achieves flexible dispatch and resource optimization of power systems by integrating distributed energy resources. However, due to significant differences in operational costs and flexibility of various types of generation resources, as well as the volatility and uncertainty of renewable energy sources (such as wind and solar power) and the complex variability of load demand, the scheduling optimization of virtual power plants has become a critical issue that needs to be addressed. To solve this, this paper proposes an intelligent scheduling method for virtual power… More >

  • Open Access

    ARTICLE

    DNEFNET: Denoising and Frequency Domain Feature Enhancement Event Fusion Network for Image Deblurring

    Kangkang Zhao1, Yaojie Chen1,*, Jianbo Li2

    CMC-Computers, Materials & Continua, Vol.84, No.1, pp. 745-762, 2025, DOI:10.32604/cmc.2025.063906 - 09 June 2025

    Abstract Traditional cameras inevitably suffer from motion blur when facing high-speed moving objects. Event cameras, as high temporal resolution bionic cameras, record intensity changes in an asynchronous manner, and their recorded high temporal resolution information can effectively solve the problem of time information loss in motion blur. Existing event-based deblurring methods still face challenges when facing high-speed moving objects. We conducted an in-depth study of the imaging principle of event cameras. We found that the event stream contains excessive noise. The valid information is sparse. Invalid event features hinder the expression of valid features due to… More >

  • Open Access

    ARTICLE

    Reinforcement Learning for Solving the Knapsack Problem

    Zhenfu Zhang1, Haiyan Yin2, Liudong Zuo3, Pan Lai1,*

    CMC-Computers, Materials & Continua, Vol.84, No.1, pp. 919-936, 2025, DOI:10.32604/cmc.2025.062980 - 09 June 2025

    Abstract The knapsack problem is a classical combinatorial optimization problem widely encountered in areas such as logistics, resource allocation, and portfolio optimization. Traditional methods, including dynamic programming (DP) and greedy algorithms, have been effective in solving small problem instances but often struggle with scalability and efficiency as the problem size increases. DP, for instance, has exponential time complexity and can become computationally prohibitive for large problem instances. On the other hand, greedy algorithms offer faster solutions but may not always yield the optimal results, especially when the problem involves complex constraints or large numbers of items.… More >

  • Open Access

    ARTICLE

    CerfeVPR: Cross-Environment Robust Feature Enhancement for Visual Place Recognition

    Lingyun Xiang1, Hang Fu1, Chunfang Yang2,*

    CMC-Computers, Materials & Continua, Vol.84, No.1, pp. 325-345, 2025, DOI:10.32604/cmc.2025.062834 - 09 June 2025

    Abstract In the Visual Place Recognition (VPR) task, existing research has leveraged large-scale pre-trained models to improve the performance of place recognition. However, when there are significant environmental differences between query images and reference images, a large number of ineffective local features will interfere with the extraction of key landmark features, leading to the retrieval of visually similar but geographically different images. To address this perceptual aliasing problem caused by environmental condition changes, we propose a novel Visual Place Recognition method with Cross-Environment Robust Feature Enhancement (CerfeVPR). This method uses the GAN network to generate similar… More >

  • Open Access

    ARTICLE

    A Data-Enhanced Deep Learning Approach for Emergency Domain Question Intention Recognition in Urban Rail Transit

    Yinuo Chen1, Xu Wu1, Jiaxin Fan1, Guangyu Zhu2,*

    CMC-Computers, Materials & Continua, Vol.84, No.1, pp. 1597-1613, 2025, DOI:10.32604/cmc.2025.062779 - 09 June 2025

    Abstract The consultation intention of emergency decision-makers in urban rail transit (URT) is input into the emergency knowledge base in the form of domain questions to obtain emergency decision support services. This approach facilitates the rapid collection of complete knowledge and rules to form effective decisions. However, the current structured degree of the URT emergency knowledge base remains low, and the domain questions lack labeled datasets, resulting in a large deviation between the consultation outcomes and the intended objectives. To address this issue, this paper proposes a question intention recognition model for the URT emergency domain,… More >

  • Open Access

    ARTICLE

    Image Style Transfer for Exhibition Hall Design Based on Multimodal Semantic-Enhanced Algorithm

    Qing Xie*, Ruiyun Yu

    CMC-Computers, Materials & Continua, Vol.84, No.1, pp. 1123-1144, 2025, DOI:10.32604/cmc.2025.062712 - 09 June 2025

    Abstract Although existing style transfer techniques have made significant progress in the field of image generation, there are still some challenges in the field of exhibition hall design. The existing style transfer methods mainly focus on the transformation of single dimensional features, but ignore the deep integration of content and style features in exhibition hall design. In addition, existing methods are deficient in detail retention, especially in accurately capturing and reproducing local textures and details while preserving the content image structure. In addition, point-based attention mechanisms tend to ignore the complexity and diversity of image features… More >

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