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  • Open Access

    ARTICLE

    Three-Dimensional Trajectory Planning for Robotic Manipulators Using Model Predictive Control and Point Cloud Optimization

    Zeinel Momynkulov1,2, Azhar Tursynova1,2,*, Olzhas Olzhayev1,2, Akhanseri Ikramov1,2, Sayat Ibrayev1, Batyrkhan Omarov1,2,3,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.145, No.1, pp. 891-918, 2025, DOI:10.32604/cmes.2025.068615 - 30 October 2025

    Abstract Robotic manipulators increasingly operate in complex three-dimensional workspaces where accuracy and strict limits on position, velocity, and acceleration must be satisfied. Conventional geometric planners emphasize path smoothness but often ignore dynamic feasibility, motivating control-aware trajectory generation. This study presents a novel model predictive control (MPC) framework for three-dimensional trajectory planning of robotic manipulators that integrates second-order dynamic modeling and multi-objective parameter optimization. Unlike conventional interpolation techniques such as cubic splines, B-splines, and linear interpolation, which neglect physical constraints and system dynamics, the proposed method generates dynamically feasible trajectories by directly optimizing over acceleration inputs while… More >

  • Open Access

    PROCEEDINGS

    A Deep-Learning Based Model with Intra- and Inter-Well Constraints for Intelligent Identification of Stratigraphic Layers

    Jinghua Yang1, Bin Gong1,2,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.33, No.3, pp. 1-2, 2025, DOI: 10.32604/icces.2025.011889

    Abstract Geological stratification interpretation divides geological strata based on acquired well-logging data, providing comparative analysis results for strata and structures. This process serves as a fundamental framework for subsequent drilling and development design plans, making it a crucial step in oil exploration and development process. Traditional geological stratification interpretation methods are based primarily on geological, logging, and experimental data, with manual determination of strata boundaries to obtain interpretation results. However, manual interpretation is characterized by strong subjectivity and reliance on experience, which may compromise the quality and consistency of the results. To eliminate the dependency on… More >

  • Open Access

    PROCEEDINGS

    Quantitative Assessment of Irreversible Deformation and Fatigue Damage Based on DIC

    Chenghuan Liu, Xiangbo Hu, Xiaogang Wang*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.33, No.3, pp. 1-1, 2025, DOI:10.32604/icces.2025.010910

    Abstract Digital image correlation (DIC) is an emerging non-contact optical measurement method that tracks speckle patterns on the specimen surface to obtain the deformation, providing an advanced methodology for the quantitative evaluation of full-field strain. The present work focuses on the quantitative assessment of deformation from micro to macro scales based on the DIC method and examines damage evolution in metal materials under static and cyclic loading conditions. First, an SEM-based DIC method allowing high-resolution strain measurement at subgrain scales is developed for investigating strain partitioning in dual-phase steel. The results reveal that the strain distribution… More >

  • Open Access

    ARTICLE

    An Active Safe Semi-Supervised Fuzzy Clustering with Pairwise Constraints Based on Cluster Boundary

    Duong Tien Dung1,2,3, Ha Hai Nam4, Nguyen Long Giang3, Luong Thi Hong Lan5,*

    CMC-Computers, Materials & Continua, Vol.85, No.3, pp. 5625-5642, 2025, DOI:10.32604/cmc.2025.069636 - 23 October 2025

    Abstract Semi-supervised clustering techniques attempt to improve clustering accuracy by utilizing a limited number of labeled data for guidance. This method effectively integrates prior knowledge using pre-labeled data. While semi-supervised fuzzy clustering (SSFC) methods leverage limited labeled data to enhance accuracy, they remain highly susceptible to inappropriate or mislabeled prior knowledge, especially in noisy or overlapping datasets where cluster boundaries are ambiguous. To enhance the effectiveness of clustering algorithms, it is essential to leverage labeled data while ensuring the safety of the previous knowledge. Existing solutions, such as the Trusted Safe Semi-Supervised Fuzzy Clustering Method (TS3FCM),… More >

  • Open Access

    ARTICLE

    Neighbor Dual-Consistency Constrained Attribute-Graph Clustering#

    Tian Tian1,2, Boyue Wang1,2, Xiaxia He1,2,*, Wentong Wang3, Meng Wang1

    CMC-Computers, Materials & Continua, Vol.85, No.3, pp. 4885-4898, 2025, DOI:10.32604/cmc.2025.067795 - 23 October 2025

    Abstract Attribute-graph clustering aims to divide the graph nodes into distinct clusters in an unsupervised manner, which usually encodes the node attribute feature and the corresponding graph structure into a latent feature space. However, traditional attribute-graph clustering methods often neglect the effect of neighbor information on clustering, leading to suboptimal clustering results as they fail to fully leverage the rich contextual information provided by neighboring nodes, which is crucial for capturing the intrinsic relationships between nodes and improving clustering performance. In this paper, we propose a novel Neighbor Dual-Consistency Constrained Attribute-Graph Clustering that leverages information from… More >

  • Open Access

    PROCEEDINGS

    Nonlinear Variation of Chord Modulus of Mild Steel During Cyclic Loading-Unloading at Different Temperatures

    Liwen Guan1, Xiaoteng Wang2,*, Tang Biao2

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.33, No.2, pp. 1-4, 2025, DOI:10.32604/icces.2025.012534

    Abstract By using the continuous cyclic loading-unloading tensile test method, the nonlinear variation behavior of the chord modulus of mild steel under different temperature conditions was systematically investigated, and the corresponding relationship between plastic strain and chord modulus during the cyclic loading-unloading process was clarified. Through the analysis of test data, the variation trends and quantitative corresponding models of plastic strain and chord modulus at different temperatures were established. The research results show that under constant temperature conditions, as the plastic strain increases to 10%, the chord modulus attenuation process presents a significant two-stage characteristic -… More >

  • Open Access

    ARTICLE

    Strain-Specific Trajectories of Behavioural, Neuroinflammatory, and Microbiota Changes under Chronic Stress in Rats with Contrast Levels of Nervous System Excitability

    Anastasia Vylegzhanina1,2, Irina Shalaginova2,*, Dana Korolevich1, Dmitry Katserov1, Alexandra Semenova1, Maria Sidorova1, Sergey Eresko3, Marat Airapetov3, Marina Pavlova2, Anna Levina2, Natalia Dyuzhikova2

    BIOCELL, Vol.49, No.10, pp. 2007-2031, 2025, DOI:10.32604/biocell.2025.071198 - 22 October 2025

    Abstract Objectives: Chronic stress can trigger neuroinflammation and gut microbiota alterations, contributing to post-stress disorders. Individual differences in stress responses, shaped by genetic and physiological factors, require better characterization. We aimed to investigate the long-term effects of chronic stress in rats selectively bred for high and low nervous system excitability. Methods: Adult male rats from two strains selectively bred for high (HT) and low (LT) excitability thresholds of the nervous system underwent a 15-day chronic emotional-pain stress protocol. Behavioral assessments (elevated plus maze), cytokine levels (TNF, IL-1β, IL-6, IL-10) in the hippocampus and amygdala measured by… More >

  • Open Access

    RETRACTION

    Retraction: Silencing of lncRNA CCDC26 Restrains the Growth and Migration of Glioma Cells In Vitro and In Vivo via Targeting miR-203

    Oncology Research Editorial Office

    Oncology Research, Vol.33, No.10, pp. 3157-3157, 2025, DOI:10.32604/or.2025.073033 - 26 September 2025

    Abstract This article has no abstract. More >

  • Open Access

    ARTICLE

    A Novel Multi-Objective Topology Optimization Method for Stiffness and Strength-Constrained Design Using the SIMP Approach

    Jianchang Hou1, Zhanpeng Jiang1, Fenghe Wu1, Hui Lian1, Zhaohua Wang2, Zijian Liu3, Weicheng Li1,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.144, No.2, pp. 1545-1572, 2025, DOI:10.32604/cmes.2025.068482 - 31 August 2025

    Abstract In this paper, a topology optimization method for coordinated stiffness and strength design is proposed under mass constraints, utilizing the Solid Isotropic Material with Penalization approach. Element densities are regulated through sensitivity filtering to mitigate numerical instabilities associated with stress concentrations. A p-norm aggregation function is employed to globalize local stress constraints, and a normalization technique linearly weights strain energy and stress, transforming the multi-objective problem into a single-objective formulation. The sensitivity of the objective function with respect to design variables is rigorously derived. Three numerical examples are presented, comparing the optimized structures in terms More >

  • Open Access

    REVIEW

    Beyond Classical Elasticity: A Review of Strain Gradient Theories, Emphasizing Computer Modeling, Physical Interpretations, and Multifunctional Applications

    Shubham Desai, Sai Sidhardh*

    CMES-Computer Modeling in Engineering & Sciences, Vol.144, No.2, pp. 1271-1334, 2025, DOI:10.32604/cmes.2025.068141 - 31 August 2025

    Abstract The increasing integration of small-scale structures in engineering, particularly in Micro-Electro-Mechanical Systems (MEMS), necessitates advanced modeling approaches to accurately capture their complex mechanical behavior. Classical continuum theories are inadequate at micro- and nanoscales, particularly concerning size effects, singularities, and phenomena like strain softening or phase transitions. This limitation follows from their lack of intrinsic length scale parameters, crucial for representing microstructural features. Theoretical and experimental findings emphasize the critical role of these parameters on small scales. This review thoroughly examines various strain gradient elasticity (SGE) theories commonly employed in literature to capture these size-dependent effects… More >

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