Showing 1,041 - 1,060 results of 2,557 for search '(functional OR function) gradient', query time: 0.22s Refine Results
  1. 1041

    A Fractional Anomalous Diffusion Model and Numerical Simulation for Sodium Ion Transport in the Intestinal Wall by Bo Yu, Xiaoyun Jiang

    Published 2013-01-01
    “…The concentrations of sodium ions in the interstitial space and in the cells have been studied as a function of time, and the mean concentration of sodium ions available for absorption by the blood capillaries has also been studied. …”
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    Article
  2. 1042

    Further Investigations on the Dynamics and Multistability Coexisted in a Memory-Based Cobweb Model by S. S. Askar

    Published 2021-01-01
    “…Based on a nonlinear demand function and a market-clearing price, a cobweb model is introduced in this paper. …”
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  3. 1043

    Evolutionary learning in neural networks by heterosynaptic plasticity by Zedong Bi, Ruiqi Fu, Guozhang Chen, Dongping Yang, Yu Zhou, Liang Tian

    Published 2025-05-01
    “…Traditional training methods like backpropagation face challenges with complex models due to instability and gradient issues. We explore evolutionary algorithms (EAs) combined with heterosynaptic plasticity as a gradient-free alternative. …”
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  4. 1044

    Multiple Solutions for a Class of Fractional Boundary Value Problems by Ge Bin

    Published 2012-01-01
    “…We study the multiplicity of solutions for the following fractional boundary value problem: where and are the left and right Riemann-Liouville fractional integrals of order , respectively, is a real number, is a given function, and is the gradient of at . The approach used in this paper is the variational method. …”
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  5. 1045

    The Application of Dextran Sedimentation as an Initial Step in Neutrophil Purification Promotes Their Stimulation, due to the Presence of Monocytes by Alex Quach, Antonio Ferrante

    Published 2017-01-01
    “…Our findings suggest that care needs to be exercised in choosing the method of neutrophil purification for functional studies.…”
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  6. 1046

    Transient Gel Diffusiophoresis of a Spherical Colloidal Particle by Hiroyuki Ohshima

    Published 2025-02-01
    “…A general theory is presented to analyze the time-dependent, transient diffusiophoresis of a charged spherical colloidal particle in an uncharged gel medium containing a symmetrical electrolyte when an electrolyte concentration gradient is suddenly applied. We derive the inverse Laplace transform of an approximate expression for the relaxation function <i>R</i>(<i>t</i>), which describes the time-course of the ratio of the diffusiophoretic mobility of a weakly charged spherical colloidal particle, possessing a thin electrical double layer, to its steady-state diffusiophoretic mobility. …”
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  7. 1047

    Trajectory Optimization for Velocity Jumps Reduction considering the Unexpectedness Characteristics of Space Manipulator Joint-Locked Failure by Qingxuan Jia, Tong Li, Gang Chen, Hanxu Sun, Jian Zhang

    Published 2016-01-01
    “…In the strategy, velocity in operation space concerning task completion directly is treated as equality constraints, and velocity in joint space concerning motion performance is treated as objective function. Global compensation vector which consists of coefficient, gradient of manipulability, and orthogonal matrix of null space is constructed to minimize the objective function. …”
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  8. 1048

    The results of alcohol septal ablation in patients with hypertrophic cardiomiopathy and arterial hypertension by K. V. Rudenko, L. O. Nevmerzhytska, O. Yu. Dudnyk, S. M. Fanta, P. A. Danchenko, I. M. Kurpaianidi, V. V. Lazoryshynets

    Published 2020-02-01
    “…Statistically significant decreases in the systolic pressure gradient, mitral regurgitation, NYHA functional class in both groups within short- and long-term periods were proved. …”
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  9. 1049

    Short Paper - A note on the Frank–Wolfe algorithm for a class of nonconvex and nonsmooth optimization problems by de Oliveira, Welington

    Published 2023-01-01
    “…Frank and Wolfe’s celebrated conditional gradient method is a well-known tool for solving smooth optimization problems for which minimizing a linear function over the feasible set is computationally cheap. …”
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  10. 1050

    USING REINFORCEMENT LEARNING ALGORITHMS FOR UAV FLIGHT OPTIMIZATION by O. Dutsiak, V. Yuzevych

    Published 2024-12-01
    “…The algorithm is used to determine the optimal policy by treating each raster as a state, the 26 possible directions as action sets, and the action value function as the objective function. When studying the results of the conducted experiment, it was found that after 160 experiments, thanks to the use of the RL gradient method, it was possible to determine the path from the starting point to the final point and successfully overcome all obstacles within a 84 seconds time period. …”
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  11. 1051

    New Index to Characterize Ionospheric Irregularity Distribution by Endawoke Yizengaw

    Published 2023-09-01
    “…Abstract Characterization of the global ionospheric irregularities as a function of local time, longitude, altitude, and magnetic activities is still a challenge for radio frequency operations, especially at the low‐latitude region. …”
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  12. 1052

    Spectroscopic Properties and Computational Studies of Phosphosilicate-Doped Compounds Including (F, Cl, Br) by Rebaz obaid kareem, Othman Hamad, Hanifi Kebiroglu, Bast Mohammed

    Published 2024-10-01
    “…In this work, we added Cl, Br, and F atoms to the phosphate-silicate (PHS) molecule using the density functional theory (DFT) approach using a 6-31G basis set and the B3LYP level of theory. …”
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  13. 1053

    Traces of a Primitive RNA Ring in Current Genomes by Jacques Demongeot

    Published 2025-05-01
    “…Then, we started to systematically track AL relics in current genomes in the form of motifs like pentamers or pairs of consecutive codons in common with AL. (3) Results: The sequence correspondence between AL and RNA sequences of organisms from different kingdoms of life (Archaea, Bacteria, and Eukarya) was found with high statistical significance, with a frequency gradient depending on both the antiquity of the species and the functional necessity of the genes. (4) Conclusions: Considering the suitability of AL as a candidate for being a primitive sequence, and the evolution of the different species considered, we can consider the AL RNA as a possible actor that favored the appearance of life on Earth.…”
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  14. 1054

    An efficient parallel DCNN algorithm in big data environment by Yimin Mao, Yaser Ahangari Nanehkaran, Neelakandan Chandrasekaran, Ying Huo, Zhan Qing Wen, ke Gong, Miao Decheng

    Published 2025-05-01
    “…Finally, a small batch gradient descent strategy (IMBGD) is presented to exclude the influence of training data of anomalous nodes on the batch gradient and solve the problem of poor convergence of the loss function. …”
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  15. 1055

    Pressure dependence of the structural and optoelectronic properties of Pb-free perovskites LiSnX3 (X = Br and Cl): A DFT approach. by Mohammed Noor S Rammoo, Hameed T Abdulla, Bewar M Ahmad, Nawzad A Abdulkareem

    Published 2025-01-01
    “…The first-principle approach based on density functional theory (DFT) is employed. The exchange-correlation functional is treated using the generalized gradient approximation (GGA), specifically a variant of the Perdew-Burke-Ernzerhof (PBE) method. …”
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  16. 1056

    An intelligent prediction method of gas concentration in coal mines based onimproved TCN-TimeGAN by Qingsong HU, Shuo ZHENG, Shiyin LI, Yanjing SUN

    Published 2024-12-01
    “…In the design of loss function, Wasserstein distance is used to measure the distribution of gas data, and the gradient penalty term of adaptive weight is added to the identification network loss function, so as to solve the problems of data irregularity and gradient disappearance, and improve training stability and prediction accuracy. …”
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  17. 1057

    Well Placement Optimization for Fractured Reservoirs: Coupling StoSAG and EDFM by Jianchun Xu, Wanhang Guo, Wenxin Zhou

    Published 2022-01-01
    “…Well placement optimization is a significant task in oil field development which aims to find the optimal well locations by maximizing the net present value (NPV) or other objective function. It is a highly nonlinear problem involving large number of variables. …”
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  18. 1058

    Effect of the Velocity Second Slip Boundary Condition on the Peristaltic Flow of Nanofluids in an Asymmetric Channel: Exact Solution by Emad H. Aly, Abdelhalim Ebaid

    Published 2014-01-01
    “…The system governing the current flow was found as a set of nonlinear partial differential equations in the stream function, pressure gradient, nanoparticle concentration, and temperature distribution. …”
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  19. 1059

    Heuristic optimization in classification atoms in molecules using GCN via uniform simulated annealing by Agnieszka Polowczyk, Alicja Polowczyk, Marcin Woźniak

    Published 2025-05-01
    “…Experimental results confirm that our proposed optimization method outperformed other standalone SOTA optimization models, including gradient and heuristics methods, demonstrating in each case to lower loss function values, higher accuracy values for balanced dataset and higher AUC (macro) values for imbalanced dataset.…”
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  20. 1060

    Distribution et dynamique de la flore ligneuse à la périphérie du Parc national de Waza (Cameroun) by Evaliste Remi Jiagho, Louis Zapfack, Arnaud Ulrich Choumele Kana Jumo

    Published 2019-12-01
    “…On the other hand, the spatial distribution of woody flora is a function of the anthropogenic pressure gradient. However, factors such as insufficient controls and high livestock carrying capacity on the periphery may result in illegal incursions into the park and the consequence may be the reversal of this gradient. …”
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