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  • Open Access

    ARTICLE

    A New Approach for Evaluating and Optimizing Hydraulic Fracturing in Coalbed Methane Reservoirs

    Xia Yan1, Wei Wang1, Kai Shen2,*, Yanqing Feng1, Junyi Sun1, Xiaogang Li1, Wentao Zhu1, Binbin Shi1, Guanglong Sheng2,3

    Energy Engineering, Vol.123, No.1, 2026, DOI:10.32604/ee.2025.070360 - 27 December 2025

    Abstract In the development of coalbed methane (CBM) reservoirs using multistage fractured horizontal wells, there often exist areas that are either repeatedly stimulated or completely unstimulated between fracturing stages, leading to suboptimal reservoir performance. Currently, there is no well-established method for accurately evaluating the effectiveness of such stimulation. This study introduces, for the first time, the concept of the Fracture Network Bridging Coefficient (FNBC) as a novel metric to assess stimulation performance. By quantitatively coupling the proportions of unstimulated and overstimulated volumes, the FNBC effectively characterizes the connectivity and efficiency of the fracture network. A background… More >

  • Open Access

    ARTICLE

    First-Principles Study on the Mechanical and Thermodynamic Properties of (NbZrHfTi)C High-Entropy Ceramics

    Yonggang Tong1,*, Kai Yang1, Pengfei Li1, Yongle Hu1, Xiubing Liang2,*, Jian Liu3, Yejun Li4, Jingzhong Fang1

    CMC-Computers, Materials & Continua, Vol.86, No.1, pp. 1-15, 2026, DOI:10.32604/cmc.2025.071890 - 10 November 2025

    Abstract (NbZrHfTi)C high-entropy ceramics, as an emerging class of ultra-high-temperature materials, have garnered significant interest due to their unique multi-principal-element crystal structure and exceptional high-temperature properties. This study systematically investigates the mechanical properties of (NbZrHfTi)C high-entropy ceramics by employing first-principles density functional theory, combined with the Debye-Grüneisen model, to explore the variations in their thermophysical properties with temperature (0–2000 K) and pressure (0–30 GPa). Thermodynamically, the calculated mixing enthalpy and Gibbs free energy confirm the feasibility of forming a stable single-phase solid solution in (NbZrHfTi)C. The calculated results of the elastic stiffness constant indicate that the… More >

  • Open Access

    ARTICLE

    Unbuckling: an answer to address cuff-related challenges in urethral instrumentation with an artificial urinary sphincter

    Hasan Jhaveri*, Mariela Martinez-Rivera, Brent Nose, Jordan Foreman, Aaron C. Lentz

    Canadian Journal of Urology, Vol.32, No.6, pp. 597-603, 2025, DOI:10.32604/cju.2025.068095 - 30 December 2025

    Abstract Objectives: There is limited in vivo data on the maximum safe instrument size that can be passed through an artificial urinary sphincter (AUS) cuff. While 21 French instruments are generally safe with the commonly used 4.5 cm cuff, larger instruments or smaller cuffs may require unbuckling to avoid urethral erosion. This study aimed to identify if artificial urinary sphincter cuff ‘unbuckling’ affects device longevity and risk of erosion. Methods: A retrospective study of patients at a quaternary health system who underwent unbuckling was conducted. Using the Epic Clarity database and Duke Enterprise Data Unified Content Explorer… More >

  • Open Access

    ARTICLE

    Structural and Vibration Characteristics of Rotating Packed Beds System for Carbon Capture Applications Using Finite Element Method

    Yunjun Lee1, Sanggyu Cheon2, Woo Chul Chung1,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.145, No.3, pp. 3381-3403, 2025, DOI:10.32604/cmes.2025.073729 - 23 December 2025

    Abstract The application of carbon capture systems on ships is technically constrained by limited onboard space and the weight of the conventional absorption tower. The rotating packed bed (RPB) has emerged as a promising alternative due to its small footprint and high mass transfer performance. However, despite its advantages, the structural and vibration stability of RPBs at high rotational speed remains insufficiently studied, and no international design standards currently exist for RPBs. To address this gap, this study performed a comprehensive finite element analysis (FEA) using ANSYS to investigate the structural and dynamic characteristics of an… More >

  • Open Access

    ARTICLE

    Fluid-Dynamic Loads on Turbine Blades in Downburst Wind Fields

    Yan Wang1,2,*, Fuqiang Zhang1, Long An1, Bo Wang1, Xueya Yang1, Jie Jin3,4

    FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.11, pp. 2651-2671, 2025, DOI:10.32604/fdmp.2025.070122 - 01 December 2025

    Abstract A downburst is a strong downdraft generated by intense thunderstorm clouds, producing radially divergent and highly destructive winds near the ground. Its characteristic scales are expressed through random variations in jet height, velocity, and diameter during an event. In this study, a reduced-scale parked wind turbine is exposed to downburst wind fields to investigate the resulting extreme wind loads. The analysis emphasizes both the flow structure of downbursts and the variations of surface wind pressure on turbine blades under different jet parameters. Results show that increasing jet velocity markedly enhances the maximum horizontal wind speed,… More > Graphic Abstract

    Fluid-Dynamic Loads on Turbine Blades in Downburst Wind Fields

  • Open Access

    ARTICLE

    Cross-Dataset Transformer-IDS with Calibration and AUC Optimization (Evaluated on NSL-KDD, UNSW-NB15, CIC-IDS2017)

    Chaonan Xin*, Keqing Xu

    Journal of Cyber Security, Vol.7, pp. 483-503, 2025, DOI:10.32604/jcs.2025.071627 - 28 November 2025

    Abstract Intrusion Detection Systems (IDS) have achieved high accuracy on benchmark datasets, yet models often fail to generalize across different network environments. In this paper, we propose Transformer-IDS, a transformer-based network intrusion detection model designed for cross-dataset generalization. The model incorporates a classification token, multi-head self-attention, and embedding layers to learn versatile features, and it introduces a calibration module and an AUC-oriented optimization objective to improve reliability and ranking performance. We evaluate Transformer-IDS on three prominent datasets (NSL-KDD, UNSW-NB15, CIC-IDS2017) in both within-dataset and cross-dataset scenarios. Results demonstrate that while conventional deep IDS models (e.g., CNN-LSTM More >

  • Open Access

    ARTICLE

    Credit Card Fraud Detection Method Based on RF-WGAN-TCN

    Ao Zhang1, Hongzhen Xu1,*, Ruxin Liu2

    CMC-Computers, Materials & Continua, Vol.85, No.3, pp. 5159-5181, 2025, DOI:10.32604/cmc.2025.067241 - 23 October 2025

    Abstract Credit card fraud is one of the primary sources of operational risk in banks, and accurate prediction of fraudulent credit card transactions is essential to minimize banks’ economic losses. Two key issues are faced in credit card fraud detection research, i.e., data category imbalance and data drift. However, the oversampling algorithm used in current research suffers from excessive noise, and the Long Short-Term Memory Network (LSTM) based temporal model suffers from gradient dispersion, which can lead to loss of model performance. To address the above problems, a credit card fraud detection method based on Random… More >

  • Open Access

    ARTICLE

    Load Balancing Control Strategy for Multi-Substation Flexible Interconnection Distribution Networks Considering Unbalanced Power Compensation

    Qiji Dai1, Jikai Li2,*, Bohui Ning1, Yutao Xu1, Chang Liu2, Xuan Zhang1

    Energy Engineering, Vol.122, No.10, pp. 4061-4080, 2025, DOI:10.32604/ee.2025.067304 - 30 September 2025

    Abstract Aiming at the challenge of complex load balancing coordination for a three-phase four-leg (3P4L) based multi-ended low voltage flexible DC distribution system (M-LVDC) considering unbalanced power compensation, this paper proposes a phase-split power decoupling unbalanced compensation strategy based load balancing strategy for 3P4L based M-LVDC. Firstly, the topology and operation principle of the 3P4L-based M-LVDC system is introduced, and quasi-proportional resonant (QPR) based phase-split power current control for the 3P4L converter is proposed. Secondly, a load-balancing control strategy considering unbalanced compensation for 3P4L-based M-LVDC is presented, in which the control diagrams for each 3P4L-based converter… More >

  • Open Access

    ARTICLE

    Physiological and Biochemical Responses and Non-Parametric Transcriptome Analysis for the Curcumin-Induced Improvement of Saline-Alkali Resistance in Akebia trifoliate (Thunb.) Koidz

    Xiaoqin Li, Yongfu Zhang*, Zhen Ren, Jiao Chen, Zuqin Qiao, Xingmei Tao, Xuan Yi, Kai Wang, Zhao Liu

    Phyton-International Journal of Experimental Botany, Vol.94, No.8, pp. 2529-2550, 2025, DOI:10.32604/phyton.2025.066894 - 29 August 2025

    Abstract Soil salinization is a major abiotic stress that hampers plant development and significantly reduces agricultural productivity, posing a serious challenge to global food security. Akebia trifoliata (Thunb.) Koidz, a species within the genus Akebia Decne., is valued for its use in food, traditional medicine, oil production, and as an ornamental plant. Curcumin, widely recognized for its pharmacological properties including anti-cancer, anti-neuroinflammatory, and anti-fibrotic effects, has recently drawn interest for its potential roles in plant stress responses. However, its impact on plant tolerance to saline-alkali stress remains poorly understood. In this study, the effects of curcumin on… More >

  • Open Access

    ARTICLE

    Strengthening Efficacy of External FRP Laminates on Aged Prestressed Beams with Unbonded Strands

    Phuong Phan-Vu*, Thanh Q. Nguyen, Phuoc Trong Nguyen

    Structural Durability & Health Monitoring, Vol.19, No.5, pp. 1111-1125, 2025, DOI:10.32604/sdhm.2025.070179 - 05 September 2025

    Abstract As prestressed concrete (PC) structures age, long-term effects, e.g., creep, shrinkage, and prestress losses, compromise their structural performance. Strengthening these aged PC beams has become a crucial matter. One effective solution is to use externally bonded fiber-reinforced polymer (FRP) sheets; however, limited research has been done on aged PC beams using the FRP, especially for beams with unbonded prestressing strands (UPC beams). Therefore, this research investigates the flexural strengthening efficacy of external FRP sheets on aged UPC beams with unbonded tendons. Aging minimally affected the failure modes of UPC beams, with nonstrengthened beams showing flexural… More >

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