Showing 9,501 - 9,520 results of 12,472 for search '"theories"', query time: 0.22s Refine Results
  1. 9501

    Research on the influence of g-C3N4 microstructure changes on the efficiency of visible light photocatalytic degradation by Hong Tu, Bihong Tian, Zhichao Zhao, Renjiang Guo, Ya Wang, Shunhong Chen, Jian Wu

    Published 2025-09-01
    “…Through density functional theory calculations and investigations of the structure-function relationship, it is confirmed that the superior catalytic activity of CN-8 lies in modifying the amino position, which alters the electron cloud distribution and promotes the efficient separation of photo-generated electron-hole pairs. …”
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  2. 9502

    Z Specification of Gate and Apron Control Management at Airport by Nazir Ahmad Zafar, Fahad Alhumaidan, Sher Afzal Khan

    Published 2014-01-01
    “…An integration of gate and apron controllers is described to manipulate the information for correct decision making and flow management. Graph theory is used for representation of airport topology and appropriate routs. …”
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  3. 9503

    Leveraging green human resource management for sustainable tourism and hospitality: a mediation model for enhancing green reputation by Bassam Samir Al-Romeedy, Thaib Alharethi

    Published 2025-01-01
    “…Abstract This study examines the critical role of green entrepreneurial orientation (GEO), green innovation (GI), and green organizational identity (GOI) in mediating the relationship between green human resource management (GHRM) and green reputation (GR) through the lens of institutional theory. These elements are significant as they underscore how organizations can strategically enhance their green reputation, a critical factor for sustainability-focused industries like tourism and hospitality. …”
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  4. 9504

    Entropy Production in an Electro-Membrane Process at Underlimiting Currents—Influence of Temperature by Juan Carlos Maroto, Sagrario Muñoz, Vicenta María Barragán

    Published 2024-12-01
    “…Classical polarization theory and the irreversible thermodynamics approach have been used to determine the total electric potential drop and the entropy generation, respectively, associated with the different transport mechanisms in each part of the system. …”
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  5. 9505

    The Characteristic Transient Response of a Pressurized Cantilever Pipe Subjected to Transverse Impact at Its Tip by Feng Liu, Yuchao Yang, Yuelei Wu

    Published 2019-01-01
    “…To describe the effects of pipe contents and internal pressure, the governing equations were derived based on large deformation theory. Bending moment and axial force were uncoupled in the constitutive equation, and an experiment-based relationship between moment and curvature was adopted. …”
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  6. 9506

    Filter Estimator Based on the Probability Distribution by Romeo Urbieta Parrazalez, Rosaura Palma Orozco, Maria Teresa Zagaceta Alvarez, Jose Luis Fernandez Munoz, Karen Alicia Aguilar Cruz

    Published 2025-01-01
    “…Commonly, all estimates are assumed in the Second Moment of Probability (SMP) with equiprobable conditions, but in this case, a specific description of the Probability Distribution Function (PDF) is considered a priori, which is a contribution to the theory of digital filtering in estimation for signal reconstruction. …”
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  7. 9507

    Shaping Outflows and Jets by Ambient Pressure: A Unified Framework by Willem A. Baan, Tao An

    Published 2025-01-01
    “…By extending classical de Laval nozzle theory to account for ambient pressure gradients, we present a unified framework that successfully describes outflows from young stellar objects to active galactic nuclei. …”
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  8. 9508

    Fractional-Order Sliding Mode Terrain-Tracking Control of Autonomous Underwater Vehicle with Sparse Identification by Zheping Yan, Lichao Hao, Qiqi Pi, Tao Chen

    Published 2024-12-01
    “…Then, a fractional-order sliding mode controller is proposed to enable accurate tracking of the path planned and Lyapunov-based theory is utilized to prove the stability of the control algorithm. …”
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  9. 9509

    A Microstructure Based Strength Model for Slag Blended Concrete with Various Curing Temperatures by Li-Na Zhang, Wang Xiao-Yong, Kyung-Taek Koh

    Published 2016-01-01
    “…Using a modified Powers’ gel-space ratio strength theory, the strength of slag blended concrete is evaluated considering both strengthening factors and weakening factors involved in strength development process. …”
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  10. 9510

    Visualizing stepwise evolution of carbon hybridization from sp 3 to sp 2 and to sp by Wei Xiong, Guang Zhang, De-Liang Bao, Jianchen Lu, Lei Gao, Yusen Li, Hui Zhang, Zilin Ruan, Zhenliang Hao, Hong-Jun Gao, Long Chen, Jinming Cai

    Published 2025-01-01
    “…Utilizing scanning probing microscopy, we distinguish three distinct carbon-carbon bond types within polymers induced by annealing at elevated temperatures. Density-functional-theory calculations unveil the pivotal role of the electron-withdrawing cyano group in activating neighboring methylene to form C(sp 3 )–C(sp 3 ) bonds, and in facilitating subsequent stepwise HCN eliminations to realize the transformation across three carbon-carbon bond types. …”
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  11. 9511

    Observed Sprite Streamer Growth Rates by H. C. Stenbaek‐Nielsen, M. G. McHarg, N. Y. Liu

    Published 2025-01-01
    “…The initial velocity increase is exponential as predicted by theory. Growth rates could be determined for 76 downward and 46 upward propagating streamers, and, in individual streamers, they are independent of altitude. …”
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  12. 9512

    Practical Aspects of Broken Rotor Bars Detection in PWM Voltage-Source-Inverter-Fed Squirrel-Cage Induction Motors by Hong-yu Zhu, Jing-tao Hu, Lei Gao, Hao Huang

    Published 2013-01-01
    “…Switching function concept and frequency modulation theory are firstly used to model fault current signal. …”
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  13. 9513

    A two-layer network model of the evolution of public risk perception of emerging technologies by Xiaqun Liu, Xiaoyue Qiu, Yaming Zhuang

    Published 2025-02-01
    “…Considering the impact of the spread of risk events on public risk perception of emerging technologies, this study adopts complex network theory to construct a two-layer network model consisting of “the spread of risk events–the evolution of public risk perception” of emerging technologies. …”
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  14. 9514

    A simplified kinetic model for the tropospheric ozone cycle by J. K. Conceição, T. S. F. Alves, E. M. D. Moya, S. A. Pozza, D. S. Rodrigues

    Published 2025-02-01
    “…A novel study of the model is presented in terms of the qualitative theory of ordinary differential equations, for which the steady state of interest is non-hyperbolic. …”
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  15. 9515

    Theoretical study of the Sb-substitution effect on the optoelectronic properties of Cs2AgBiBr6 double perovskite by Lhouceine Moulaoui, Abdelhafid Najim, Marouane Archi, Mohamed Al-Hattab, Omar Bajjou, Anass Bakour, Youssef Lachtioui, Khalid Rahmani, Bouzid Manaut

    Published 2025-01-01
    “…We analyzed the structure of the double perovskite Cs2AgBiBr6 utilizing Density Functional Theory (DFT), adding different doping concentrations of the Sb atom (Cs2AgBi1-x SbxBr6, with x = 0.0625, 0.125, 0.1875). …”
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  16. 9516

    An Extension of the Double G′/G, 1/G-Expansion Method for Conformable Fractional Differential Equations by Altaf A. Al-Shawba, Farah A. Abdullah, Amirah Azmi, M. Ali Akbar

    Published 2020-01-01
    “…The phenomena, molecular path in a liquid or a gas, fluctuating price stoke, fission and fusion, quantum field theory, relativistic wave motion, etc., are modeled through the nonlinear time fractional clannish random Walker’s parabolic (CRWP) equation, nonlinear time fractional SharmaTassoOlver (STO) equation, and the nonlinear space-time fractional KleinGordon equation. …”
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  17. 9517

    Optimal control problems with time delays: Two case studies in biomedicine by Laurenz Göllmann, Helmut Maurer

    Published 2018-09-01
    “…There exists an extensive literature on delay differential models in biology and biomedicine, but only a few papers study such models in the framework of optimal control theory. In this paper, we consider optimal control problems with multiple time delays in state and control variables and present two applications in biomedicine. …”
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  18. 9518

    Numerical Simulation of Recycled Concrete Using Convex Aggregate Model and Base Force Element Method by Yijiang Peng, Hao Chu, Jiwei Pu

    Published 2016-01-01
    “…In order to simulate the damage processes of RAC, a curve damage model was adopted as the damage constitutive model and the strength theory of maximum tensile strain was used as the failure criterion in the BFEM on mesomechanics. …”
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  19. 9519

    A novel technique for the synthesis of Au3N and its characterization using X-ray diffraction and Raman scattering techniques by S. Giri, P. Mallick, B. Mallick

    Published 2025-01-01
    “…The Raman shift of Au3N was found to be 1127.5 ± 0.3 cm−1, which is in good agreement with the theoretically calculated value obtained using density-functional theory. The prospects and future directions for the development of this novel gold nitride material are discussed.…”
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  20. 9520

    Enhancing the quality of low-light images via the coefficient bounds derived for a subclass of Sakaguchi-type function by K. Sivagami Sundari, B. Srutha Keerthi

    Published 2025-02-01
    “…Abstract This paper introduces a new approach for enhancing low-light images by utilizing coefficient bounds from a specific subclass of analytic functions, a concept rooted in geometric function theory. Our method is designed to adapt dynamically to different lighting conditions, ensuring effective image enhancement in both uniformly and non-uniformly illuminated environments. …”
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