Showing 1,601 - 1,620 results of 2,557 for search '(functional OR function) gradient', query time: 0.19s Refine Results
  1. 1601

    Restoration of Motion Blurred Images Based on Rich Edge Region Extraction Using a Gray-Level Co-Occurrence Matrix by Minghua Zhao, Xin Zhang, Zhenghao Shi, Peng Li, Bing Li

    Published 2018-01-01
    “…An image quality evaluation function and the operation time are used to evaluate the performance of the proposed method. …”
    Get full text
    Article
  2. 1602

    Spatial Variability and Periodicity of Precipitation in the Middle Reaches of the Yellow River, China by Yi He, Xingmin Mu, Peng Gao, Guangju Zhao, Fei Wang, Wenyi Sun, Yuqing Zhang

    Published 2016-01-01
    “…The empirical orthogonal function (EOF), ensemble empirical mode decomposition, and Hurst exponent are used to detect spatial, multiscale characteristics of periodicity and trend for precipitation. …”
    Get full text
    Article
  3. 1603

    Computerised Method of Multiparameter Optimisation of Predictive Control Algorithms for Asynchronous Electric Drives by Grygorii Diachenko, Serhii Semenov, Katarzyna Marczak, Gernot Schullerus, Ivan Laktionov

    Published 2025-07-01
    “…A computer model was designed in MATLAB and Simulink R2024a based on the gradient-based model predictive control strategy. A series of simulation experiments were carried out by varying the sampling step, number of iterations, prediction horizon, loss function parameters, and maximum linear search step to identify their impact on the control quality indicators. …”
    Get full text
    Article
  4. 1604

    Analysis of Parameterized Quantum Circuits: On the Connection Between Expressibility and Types of Quantum Gates by Yu Liu, Kazuya Kaneko, Kentaro Baba, Jumpei Koyama, Koichi Kimura, Naoyuki Takeda

    Published 2025-01-01
    “…In the context of variational-quantum-algorithm-based quantum machine learning (QML), a QML model composed of a highly expressible PQC and a sufficient number of qubits is theoretically capable of approximating any arbitrary continuous function. While much research has explored the relationship between expressibility and learning performance, as well as the number of layers in PQCs, the connection between expressibility and PQC structure has received comparatively less attention. …”
    Get full text
    Article
  5. 1605

    Transjugular intrahepatic portocaval shunting as a preparation phase for liver transplantation by P. G. Tarazov, D. A. Granov, A. A. Polikarpov, M. I. Generalov, I. O. Rutkin, O. A. Gerasimova, F. K. Zherebtsov

    Published 2018-08-01
    “…TIPS was successfully carried out in all the patients. The portovenous gradient was reduced by 2—3 times (to 9—12 mm Hg). …”
    Get full text
    Article
  6. 1606

    Enhancing Uplink Communication in Wireless Powered Communication Networks Through Rate-Splitting Multiple Access and Joint Resource Optimization by Iqra Hameed, Mario R. Camana, Mohammad Abrar Shakil Sejan, Hyoung Kyu Song

    Published 2025-03-01
    “…To solve this non-convex joint optimization problem, we employ the simultaneous perturbation stochastic approximation (SPSA) algorithm, a gradient-free method that efficiently estimates optimal parameters with minimal function evaluations. …”
    Get full text
    Article
  7. 1607
  8. 1608

    Friction and wear characteristics of acidic phosphate ester boundary layers analyzed by near-edge X-ray absorption fine structure by Naoko Takechi-Takahashi, Kensuke Matsushima, Noritake Isomura, Satoru Kosaka, Toshihide Ohmori, Toshinari Sano, Satoru Maegawa, Fumihiro Itoigawa

    Published 2025-06-01
    “…The maximum effective viscosity calculated from a function obtained by fitting the friction diagram was approximately 3,000 Pa·s, which was equivalent to that of common grease. …”
    Get full text
    Article
  9. 1609

    Detecting deformation mechanisms of metals from acoustic emission signals through knowledge-driven unsupervised learning by Boyuan Gou, Yan Chen, Songhua Xu, Jun Sun, Turab Lookman, Ekhard K. H. Salje, Xiangdong Ding

    Published 2025-07-01
    “…The novel method leverages a family of gradient-driven supervised base learners and integrates them with a knowledge-infused aggregate loss function, effectively transforming the approach into an unsupervised learning framework. …”
    Get full text
    Article
  10. 1610

    Inverse design of 3D nanophotonic devices with structural integrity using auxiliary thermal solvers by Kuster Oliver, Augenstein Yannick, Hernández Roberto Narváez, Rockstuhl Carsten, Sturges Thomas Jebb

    Published 2025-04-01
    “…Alongside the optical response, this heat metric becomes part of our objective function. We demonstrate the utility of our algorithm by designing two 3D nanophotonic devices. …”
    Get full text
    Article
  11. 1611

    Machine Learning for Enhanced COPD Diagnosis: A Comparative Analysis of Classification Algorithms by Walaa H. Elashmawi, Adel Djellal, Alaa Sheta, Salim Surani, Sultan Aljahdali

    Published 2024-12-01
    “…These models were applied to a dataset comprising 1603 patients after being referred for a pulmonary function test. <b>Results</b>: The RFC has achieved superior accuracy, reaching up to 82.06% in training and 70.47% in testing. …”
    Get full text
    Article
  12. 1612

    Modelling the spatial-temporal progression of the 2009 A/H1N1 influenza pandemic in Chile by Raimund Bürger, Gerardo Chowell, Pep Mulet, Luis M. Villada

    Published 2015-09-01
    “…A spatial-temporal transmission model of 2009 A/H1N1 pandemic influenza across Chile,a country that spans a large latitudinal range, is developed to characterize the spatial variation in peak timingof that pandemic as a function of local transmission rates, spatial connectivity assumptions for Chilean regions, andthe putative location of introduction of the novel virus into the country. …”
    Get full text
    Article
  13. 1613

    Coordinated Reentry Guidance with A* and Deep Reinforcement Learning for Hypersonic Morphing Vehicles Under Multiple No-Fly Zones by Cunyu Bao, Xingchen Li, Weile Xu, Guojian Tang, Wen Yao

    Published 2025-06-01
    “…The A* algorithm generates heuristic trajectories circumventing no-fly zones, reducing the evaluation function by 6.2% compared to greedy methods, while DDPG optimizes sweep angles to minimize velocity loss and terminal errors (0.09 km position, 0.01 m/s velocity). …”
    Get full text
    Article
  14. 1614

    Application of Machine Learning Techniques for Predicting Students’ Acoustic Evaluation in a University Library by Dadi Zhang, Kwok-Wai Mui, Massimiliano Masullo, Ling-Tim Wong

    Published 2024-07-01
    “…Using the collected personal information, room-related parameters, and sound pressure levels as input, six machine learning models (Support Vector Machine–Radial Basis Function (SVM (RBF)), Support Vector Machine–Sigmoid (SVM (Sigmoid)), Gradient Boosting Machine (GBM), Logistic Regression (LR), Random Forest (RF), and Naïve Bayes (NB)) were trained to predict students’ acoustic acceptance/satisfaction. …”
    Get full text
    Article
  15. 1615

    Multi-Agent Reinforcement Learning in Games: Research and Applications by Haiyang Li, Ping Yang, Weidong Liu, Shaoqiang Yan, Xinyi Zhang, Donglin Zhu

    Published 2025-06-01
    “…Building upon stochastic game and extensive-form game-theoretic frameworks, we establish a methodological taxonomy across three dimensions: value function optimization, policy gradient learning, and online search planning, thereby clarifying the evolutionary logic and innovation trajectories of algorithmic advancements. …”
    Get full text
    Article
  16. 1616

    Malaria Disease Prediction Based on Convolutional Neural Networks by Dhrgam AL Kafaf, Noor N. Thamir, Samara S. AL-Hadithy

    Published 2024-06-01
    “…In order to confront the challenge of diminishing gradient and facilitate the attainment of convergence, the activation function known as Rectified Linear Unit (ReLU) is ingeniously employed. …”
    Get full text
    Article
  17. 1617

    Utilising machine learning classification models for meteorological drought monitoring and analysis by Iqra Mumtaz, Rizwan Niaz, Zamama Sajid, Abdu Qaid Alameri, Zulfiqar Ali, Khaled A. Gepreel

    Published 2025-12-01
    “…To address model-specific challenges, ridge regression was applied to mitigate multicollinearity in Logistic Regression, while SVM incorporated the Radial Basis Function (RBF) kernel and isolation forest to manage non-linearity and outliers. …”
    Get full text
    Article
  18. 1618

    Mycorrhizal Fungi Influence on Mature Tree Growth: Stronger in High‐Nitrogen Soils for an EMF‐Associated Tree and in Low‐Nitrogen Soils for Two AMF‐Associated Trees by Inés Ibáñez, Morgan R. McPherson, Rima A. Upchurch, Donald R. Zak

    Published 2025-06-01
    “…ABSTRACT The plant–mycorrhizal fungi relationship can range from mutualistic to parasitic as a function of the fungal taxa involved, plant ontogeny, as well as the availability of resources. …”
    Get full text
    Article
  19. 1619

    RIS-Assisted CR-MEC Systems Using Deep Reinforcement Learning Approach by Pham Duy Thanh, Hoang Thi Huong Giang, Ic-Pyo Hong

    Published 2024-01-01
    “…A Markov decision process problem is formulated and then is firstly solved by a proposed deep policy gradient scheme, in which the system directly learns the policy from gradients of actions. …”
    Get full text
    Article
  20. 1620

    Study on shallow grain induced micro-region surface topography instability of bulk Sn alloys upon internal stress conditions by Bei Hu, Wenjun Zhou, Kensuke Tsuchiya

    Published 2025-06-01
    “…This work summarizes the fundamental understanding of SG behavior under varying internal stress conditions, elevating the function-oriented manufacturing process design on bulk Sn-alloy for ensuring the surface quality.…”
    Get full text
    Article