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  • Article
  • Open Access

Nonlinear Receding Contact Mechanics of Functionally Graded Layers for Aerospace Structures: A Symmetry-Based Analytical and FEM Study

  • Ahmad Abushattal,
  • Merve Terzi,
  • Ayşegül Eyüboğlu,
  • Murat Yaylacı,
  • Dursun Murat Sekban,
  • Safa Nayır,
  • Ecren Uzun Yaylacı,
  • Deshinta Arrova Dewi and
  • Ahmet Birinci

19 February 2026

Functionally graded materials (FGMs) are widely applied in spacecraft structural design, thermal protection systems, and planetary landing mechanisms, benefiting from their ability to resist large thermal, pressure, and force gradients. To assess str...

  • Article
  • Open Access

18 February 2026

This article investigates the widespread occurrence of wave-like behavior in biological systems and reflects on the importance of reaction–diffusion frameworks to explain fast information transfer. Focusing on the classical Fisher–Kolmogo...

  • Article
  • Open Access

18 February 2026

To address the critical demand for real-time dynamic tracking of personnel in complex buildings during emergency rescue, a novel system was proposed integrating Back Propagation (BP) neural networks with Double-Sided Two-Way Ranging (DS-TWR) technolo...

  • Article
  • Open Access

Soliton Genesis in a Novel Gross–Pitaevskii System: Analytical Construction and Dynamical Control

  • Khaled Aldwoah,
  • L. M. Abdalgadir,
  • Shafqat Ur Rehman,
  • Muhammad Bilal,
  • Faez A. Alqarni,
  • Ria Egami and
  • M. M. Rashed

18 February 2026

The purpose of this study is to construct diverse forms of exact soliton solutions and conduct a comprehensive qualitative analysis. For this aim, we use the Gross–Pitaevskii system, which belongs to the family of nonlinear Schrödinger equ...

  • Article
  • Open Access

A Gradient-Norm-Aware Optimizer for Symmetry-Preserving and Stable Deep Learning

  • Hong Chen,
  • Xuefeng Zhang,
  • Haijing Sun and
  • Yichuan Shao

18 February 2026

The stability of deep neural networks during training is related to the structural symmetry between gradient dynamics and parameter updates. Existing Adam-type optimizers are prone to breaking this dynamic symmetry when the gradient scale changes dra...

  • Article
  • Open Access
44 Views
29 Pages

17 February 2026

Quantum biology is a multidiscipline which analyses possible critical aspects of life that could be based on the macroscopic expression of quantum phenomena. The high efficiency of light energy harvesting in green sulfur bacteria during photosynthesi...

  • Article
  • Open Access
110 Views
24 Pages

17 February 2026

Due to phenomena, such as refraction, reflection, and light scattering, the three-dimensional (3D) reconstruction of transparent objects with complex geometric symmetry or contours is confronted with the challenges of insufficient extraction of featu...

  • Article
  • Open Access
110 Views
17 Pages

17 February 2026

The expansion of urban rail transit has exacerbated environmental issues related to low-frequency noise (LFN), yet the impact of geometric symmetry breaking on structure-borne noise remains underexplored. This study aims to quantify the mechanism by...

  • Article
  • Open Access
65 Views
27 Pages

16 February 2026

Truck platooning enabled by V2X and cooperative driving can reduce aerodynamic drag and consequently decrease fuel consumption and CO2 emissions. Meanwhile, hub-and-spoke courier networks require strategic decisions on hub locations, allocation, and...

  • Article
  • Open Access
60 Views
36 Pages

16 February 2026

The eccentric permanent-magnet (PM) pole technique is widely recognized as an effective technique for reducing cogging torque in surface-mounted PM motors (SMPMMs). This paper proposes a novel analytical approach based on bilinear mapping to determin...

  • Article
  • Open Access
48 Views
25 Pages

16 February 2026

In this work, the Renormalization Method (RM) is used to analyze the dynamics of a nonlinear two-degree-of-freedom (2DOF) system under parametric excitation, with a focus on fractal vibration behavior. This procedure comprises transforming the system...

  • Article
  • Open Access
123 Views
28 Pages

15 February 2026

Traffic flow prediction is a pivotal task in intelligent transportation systems. The primary challenge lies in accurately modeling the dynamically evolving and directional spatio-temporal dependencies inherent in road networks. Existing graph neural...

  • Article
  • Open Access
122 Views
22 Pages

15 February 2026

Droplet impact dynamics is a critical subject in interfacial fluid mechanics, with applications in aerospace, energy transport, microfluidics, and chemical engineering. This study investigates the impact behavior of double droplets on cylindrical sur...

  • Article
  • Open Access
122 Views
27 Pages

15 February 2026

Differential network analysis provides a powerful framework for characterizing how biological networks change across different conditions or external stimuli. With recent advances in high-throughput technologies, matrix-valued data have become increa...

  • Article
  • Open Access
119 Views
25 Pages

15 February 2026

Continual learning of multivariate time series (MTS) forecasting is critical for process industries where working condition drift is frequent due to the variation in the feed properties and other factors. However, existing continual learning methods...

  • Article
  • Open Access
132 Views
12 Pages

14 February 2026

This study addresses the common challenges of complex soil behavior and the difficulties in achieving precise control during the construction of large open caissons. A centrifugal model test was conducted to investigate open caisson–fine sandy...

  • Article
  • Open Access
87 Views
20 Pages

14 February 2026

We considerthe single-machine group scheduling problem with controllable processing times (i.e., resource allocation) under a common due-window (condw) assignment. The objective is to minimize a total cost composed of earliness, tardiness, due-window...

  • Article
  • Open Access
129 Views
18 Pages

Thermoelastic Oscillations of a Solid Medium with Voids via the Influence of Atangana-Baleanu-Caputo Fractional Derivative

  • Abdelgabar Adam Hassan,
  • Ahmed Yahya,
  • Adam Zakria,
  • Shams A. Ahmed,
  • Ibrahim-Elkhalil Ahmed,
  • Ibrahim Omer Ahmed,
  • Eshraga Salih and
  • Muntasir Suhail

14 February 2026

This study employs the Atangana–Baleanu–Caputo fractional derivative within the Moore–Gibson–Thompson heat conduction model to analytically investigate the thermoelastic vibrations in solid medium-containing voids. The ABC&nda...

  • Article
  • Open Access
187 Views
22 Pages

Symmetry- and Asymmetry-Aware Domain Adaptation for Cross-Domain Sentiment Analysis

  • Chumsak Sibunruang,
  • Jantima Polpinij,
  • Manasawee Kaenampornpan,
  • Thananchai Khamket,
  • Jaturong Som-ard,
  • Anirut Chottanom,
  • Jatuphum Juanchaiyaphum,
  • Vuttichai Vichianchai and
  • Bancha Luaphol

14 February 2026

Cross-domain sentiment analysis remains challenging due to distributional shifts and heterogeneous sentiment expressions across platforms. Existing domain adaptation approaches primarily focus on enforcing domain-invariant representations. However, s...

  • Article
  • Open Access
94 Views
30 Pages

14 February 2026

The Multi-Objective Flexible Job Shop Scheduling Problem (MOFJSSP) represents a core challenge in modern manufacturing: achieving synergistic optimization of multiple conflicting objectives while pursuing production efficiency and energy sustainabili...

  • Article
  • Open Access
135 Views
18 Pages

Evaluation of Interference in 3D Groove Detection Using Reconstructed Triangular Patch Angles

  • Bin Zhou,
  • Hong Lu,
  • Yongquan Zhang,
  • Zidong Wu,
  • He Huang,
  • Shuoyan Qi and
  • Junyi Mao

14 February 2026

3D vision-based groove detection is playing a critical role in enabling autonomous recognition. However, most existing interference evaluation strategies rely on height-based statistics or handcrafted heuristics, which (i) confuse genuine groove geom...

  • Article
  • Open Access
93 Views
20 Pages

Kinematic Anisotropies in PTA Observations: Analytical Toolkit

  • Maximilian Blümke,
  • Kai Schmitz,
  • Tobias Schröder,
  • Deepali Agarwal and
  • Joseph D. Romano

14 February 2026

The reported evidence for an isotropic gravitational-wave background (GWB) from pulsar timing array (PTA) collaborations has motivated searches for extrinsic and intrinsic anisotropies. Kinematic anisotropies may arise as a consequence of a boosted o...

  • Article
  • Open Access
94 Views
24 Pages

14 February 2026

Multimodal named-entity recognition (MNER) aims to identify entity information by leveraging multimodal features. With recent research shifting to multi-image scenarios, existing methods overlook modality noise and lack effective cross-modal interact...

  • Article
  • Open Access
123 Views
31 Pages

A Generative AI-Driven Industrial Design Framework for Human–GenAI Co-Creation

  • Chen Chen,
  • Fangmin Cheng,
  • Boyi Zhang,
  • Ruozhen Jin,
  • Chaoyi Dong,
  • Zhixue Sun and
  • Yaxuan Zhou

13 February 2026

Generative AI (GenAI) is accelerating design space exploration and multimodal prototyping in industrial design (ID), bringing new efficiencies and possibilities to early-stage ideation and cross-media expression. Yet many studies do not clearly defin...

  • Article
  • Open Access
69 Views
32 Pages

13 February 2026

Traditional non-negative matrix factorization (NMF) faces challenges when dealing with complex data, primarily characterized by sensitivity to noise, neglect of data geometric structure, and inability to effectively utilize supervised information. To...

  • Article
  • Open Access
81 Views
24 Pages

13 February 2026

Distributed manufacturing introduces new challenges to traditional production shop scheduling, and the combination of machine learning and metaheuristic algorithms offers new approaches to solve these problems. To address the distributed hybrid flow...

  • Article
  • Open Access
56 Views
29 Pages

Finite Element Analysis and Optimization of Automotive Disk Brakes Using ANSYS

  • Yingshuai Liu,
  • Shufang Wang,
  • Shuo Shi and
  • Jianwei Tan

13 February 2026

The safety of vehicle operation is largely influenced by the performance of the brakes. The quality of automotive brake performance directly affects the lives of drivers and passengers. This paper conducts an in-depth study based on the structural ch...

  • Article
  • Open Access
119 Views
18 Pages

SAW-Based Active Cleaning Cover Lens for Physical AI Optical Sensors

  • Jiwoon Jeon,
  • Jungwoo Yoon,
  • Woochan Kim,
  • Youngkwang Kim and
  • Sangkug Chung

13 February 2026

This paper presents a cover lens concept for camera modules based on surface acoustic waves (SAW) to mitigate the degradation of physical AI optical sensor field-of-view performance caused by surface contamination. The proposed approach utilizes a si...

  • Article
  • Open Access
132 Views
19 Pages

13 February 2026

Sliding failure is a common form of instability for reverse rock slopes. The determination of the failure plane for such unstable slopes is currently a key and challenging issue in research. To pinpoint the position of the failure surface with higher...

  • Article
  • Open Access
119 Views
16 Pages

12 February 2026

Asymmetries in data distributions and performance across subgroups can induce systematic unfairness in real-world systems. A variety of previous studies have significantly ameliorated the fairness of deep learning models; however, most of them necess...

  • Article
  • Open Access
170 Views
48 Pages

Symmetry-Aware Optimized Fuzzy Deep Reinforcement Learning-GRU for Load Balancing in Smart Power Grids

  • Mohammad Mahdi Mohammad,
  • Mojdeh Sadat Najafi Zadeh,
  • Seyedkian Rezvanjou,
  • Nuria Serrano,
  • Francisco Hernando-Gallego,
  • Diego Martín and
  • José Vicente Álvarez-Bravo

12 February 2026

The rapid growth of renewable integration and active consumer participation has made modern power grids increasingly complex and dynamic, where maintaining balanced and efficient energy distribution remains a central challenge. This paper introduces...

  • Article
  • Open Access
106 Views
39 Pages

12 February 2026

To tackle the safety performance concerns of Squat shear walls in nuclear island structures (which serve as shields for powerhouses) under seismic action, this research endeavors to explore the seismic performance of such shear walls with different r...

  • Article
  • Open Access
130 Views
20 Pages

12 February 2026

This study focuses on analyzing the dynamic process, strength, and orientation of risk spillovers in the Chinese banking system under the exogenous shock of the COVID-19 pandemic. Using daily closing prices of 25 representative banks, it stratifies t...

  • Article
  • Open Access
145 Views
41 Pages

12 February 2026

To overcome the limitations of the standard Student Psychology-Based Optimization (SPBO) algorithm, such as strategy homogeneity, insufficient elite-guided diversity, and inefficient evolution of low-quality individuals, this paper proposes a Hierarc...

  • Article
  • Open Access
120 Views
24 Pages

HDIM-JER: Modeling Higher-Order Semantic Dependencies for Joint Entity–Relation Extraction in Threat Intelligence Texts

  • Siyu Zhu,
  • Weicheng Mao,
  • Lin Miao,
  • Jing Yin,
  • Chao Du,
  • Xin Li,
  • Xiangyun Guo,
  • Liang Wang and
  • Ning Li

12 February 2026

Extracting structured threat intelligence from unstructured cybersecurity texts requires accurate identification of entities together with their underlying semantic relations. However, threat reports often exhibit intricate sentence structures, long-...

  • Article
  • Open Access
253 Views
29 Pages

12 February 2026

This paper introduces an LLM-driven design-time workflow for Internet of Things (IoT) and network management system development that combines the generative and summarization capabilities of Large Language Models with the formal rigor of Model-Driven...

  • Article
  • Open Access
135 Views
20 Pages

12 February 2026

For businesses to optimize management decisions in the digital transformation, a process inherently characterized by symmetry between feedback collection and strategic adjustment, it is essential to automatically extract fine-grained opinions from la...

  • Article
  • Open Access
120 Views
15 Pages

Enhanced Estimation Methods Using Auxiliary Information for Rare and Clustered Populations

  • Pannarat Guayjarernpanishk,
  • Supawadee Wichitchan,
  • Chawalit Boonpok,
  • Monchaya Chiangpradit and
  • Nipaporn Chutiman

11 February 2026

This research proposes two new estimators which use auxiliary information to derive estimates of population means in cases where populations are considered rare and clustered in line with the General Inverse Adaptive Cluster Sampling (GIACS) framewor...

  • Article
  • Open Access
107 Views
34 Pages

11 February 2026

This paper develops a generalized Laplace transform framework on weighted function spaces Cδψ,γn[a,b], establishing a symmetry between integer-order δψ operators and fractional ψ-Hilfer derivatives at the level of transf...

  • Article
  • Open Access
97 Views
12 Pages

11 February 2026

The (2+1)-dimensional Caudrey–Dodd–Gibbon (CDG) equation, which can frequently be used to be describe the propagations of shallow-water waves and plasma physics, is solved by various methods in this paper, thereby revealing its nonlinear...

  • Article
  • Open Access
164 Views
21 Pages

CEVPDS: A Cooperative Emergency Vehicle Priority Driving Scheme for Improving Travel Efficiency Through V2X Communications

  • Yanchi Wang,
  • Mu Wang,
  • Mei Yang,
  • Chunxiao Li,
  • Jiajun Shen,
  • Haoyu Wang and
  • Wasinee Noonpakdee

11 February 2026

Emergency vehicles (EmVs) play a crucial role in providing prompt services to public rescue activities. However, due to the impacts of ordinary vehicles (OVs), EmVs are often blocked and cannot reach the rescue site in time. Therefore, a cooperative...

  • Article
  • Open Access
131 Views
27 Pages

11 February 2026

Shadow removal aims to restore photometric, chromatic, and structural consistency between shadowed and non-shadowed image regions. Although weakly supervised shadow removal methods reduce the reliance on densely paired training data, they still strug...

  • Article
  • Open Access
101 Views
27 Pages

11 February 2026

An advanced filtration technique for reusing greywater is a critical and essential procedure for solving water scarcity and meeting the rising demand for clean water in densely populated and urban areas. Greywater or wastewater from washing machines,...

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Symmetry - ISSN 2073-8994