Special Issues

Symmetry publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue polices and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Symmetry/Asymmetry in Evolutionary Algorithms
edited by Enrique Naredo and
submission deadline 30 Nov 2024 | Viewed by 154 | Submission Open
Keywords: genetic algorithms; genetic programming; grammatical evolution; evolutionary computation; evolutionary programming; evolution strategies; differential evolution; swarm intelligence; particle swarm optimization; artificial bee colony; ant colony optimization; artificial immune systems; memetic algorithms; large-scale optimization problems; cuckoo search algorithms; symbiotic organisms search; whale optimization algorithms; butterfly optimization algorithms; medical image processing and analysis; fundamentals of evolutionary algorithms; biometric recognition; optimization and learning methods; document analysis and recognition; video analysis and understanding; character recognition; visual applications and systems; face recognition and pose estimation; vision problems in robotics and autonomous driving; pattern classification and clustering analysis; object detection; tracking; and recognition; machine learning; action recognition; neural networks and deep learning; multimedia analysis and reasoning; feature extraction and feature selection; GPU implementation of evolutionary computing; symmetry
(This special issue belongs to the Section Computer)
Advances in Chemical Engineering with Symmetry/Asymmetry: A Focus on Clean Processes and Bio-Waste Valorization submission deadline 30 Nov 2024 | Viewed by 144 | Submission Open
Keywords: symmetry; chemical engineering; bio-waste valorization; clean processes; optimization; multiphysics modeling; efficiency systems; sustainability; exergetic analysis; numerical simulation
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetry in Cosmological Theories and Observations
edited by and Gansukh Tumurtushaa
submission deadline 30 Nov 2024 | Viewed by 116 | Submission Open
Keywords: inflationary models and primordial symmetries; symmetry breaking in the early Universe; dark matter and dark energy models; cosmic microwave background radiation; gravitational waves and their implications for symmetry; galaxy formation and the large-scale structure of the Universe; baryogenesis and leptogenesis; symmetries in high-energy astrophysics; black holes and their symmetries; tests of fundamental symmetries using astronomical observations; symmetry principles in modified gravity theories; topological defects and cosmic strings; constraints on symmetry from cosmological data; symmetries in the evolution of the universe; role of symmetry in cosmological perturbations; asymmetry in cosmic baryon and lepton numbers; probing cosmological symmetries with next-generation observatories
(This special issue belongs to the Section Physics)
Challenges and New Trends in Optimization and Control Theory in the Era of AI: Analysis, Modelling, and Symmetrical Mathematical Methods submission deadline 1 Dec 2024 | 2 articles | Viewed by 1923 | Submission Open
Keywords: symmetric methods for solving fractional and ordinary differential equations; fractals and fractional calculus; PDE: deterministic; stochastic; and fuzzy; symmetrical/asymmetrical models in biomathematics; symmetry analysis and methods; optimization; control theory; AI and ML
(This special issue belongs to the Section Computer)
Symmetry and Asymmetry: Shaping the Future of Power Grids
edited by Arturo R. Messina
submission deadline 1 Dec 2024 | Viewed by 163 | Submission Open
Keywords: controllability and observability; grid stability; power grids; power system dynamics; symmetry/asymmetry; re-silient grid infrastructure; risk assessment; robustness
(This special issue belongs to the Section Engineering and Materials)
Chemistry Using the Symmetry of Crystals
edited by
submission deadline 15 Dec 2024 | 1 articles | Viewed by 1155 | Submission Open
Keywords: crystallography; structural chemistry; crystal structure; symmetry; space group; chirality
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetric or Asymmetric Distributions and Its Applications
edited by Xuelong Hu
submission deadline 30 Dec 2024 | 5 articles | Viewed by 4252 | Submission Open
Keywords: symmetric or asymmetric distributions; univariate distributions; multivariate distributions
(This special issue belongs to the Section Mathematics)
Evolutionary Computation, Metaheuristics, Nature-Inspired Algorithms, and Symmetry
edited by , and Yang Yu
submission deadline 30 Dec 2024 | 4 articles | Viewed by 3723 | Submission Open
Keywords: evolutionary computation; metaheuristics; nature-inspired algorithms; single-objective optimization; multi-objective optimization; real-world engineering application; intelligent systems; Artificial Intelligence
(This special issue belongs to the Section Computer)
Recent Developments on Fuzzy Sets Extensions
edited by
submission deadline 31 Dec 2024 | 17 articles | Viewed by 21580 | Submission Open
(This special issue belongs to the Section Mathematics)
Symmetry and Asymmetry in Machine Learning
edited by Qinwei Fan, and
submission deadline 31 Dec 2024 | 5 articles | Viewed by 17937 | Submission Open
Keywords: machine learning; deep learning; convolutional neural networks; spiking neural network; recurrent neural networks; graph neural network; long short-term memory; extreme learning machine; generative adversarial networks; reinforcement learning; clustering analysis; computer vision; natural language processing; time series analysis; model-based clustering modeling high-dimensional
(This special issue belongs to the Section Computer)
Image Processing and Symmetry: Topics and Applications
edited by Jun Xu
submission deadline 31 Dec 2024 | 11 articles | Viewed by 17769 | Submission Open
Keywords: image processing; deep learning; lightweight network; super resolution; image denoising; image deblurring
(This special issue belongs to the Section Computer)
Symmetry in Computational Intelligence and Applications submission deadline 31 Dec 2024 | 3 articles | Viewed by 17720 | Submission Open
(This special issue belongs to the Section Computer)
Symmetry: Recent Developments in Engineering Science and Applications submission deadline 31 Dec 2024 | 10 articles | Viewed by 16615 | Submission Open
(This special issue belongs to the Section Engineering and Materials)
Golden Mean Number System and Fractal Theory for Physics and Materials Science
edited by and
submission deadline 31 Dec 2024 | 8 articles | Viewed by 14592 | Submission Open
(This special issue belongs to the Section Mathematics)
Mathematical Modeling in Biology and Life Sciences
edited by Yueping Dong, and Yasuhiro Takeuchi
submission deadline 31 Dec 2024 | 11 articles | Viewed by 13115 | Submission Open
Keywords: population dynamics; infectious disease modelling; complex network; virus dynamics and mutation; cancer immune modelling; potential symmetries; differential equations; dynamical systems
(This special issue belongs to the Section Mathematics)
Meta-Heuristics for Manufacturing Systems Optimization Ⅱ
edited by and
submission deadline 31 Dec 2024 | 8 articles | Viewed by 12972 | Submission Open
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Nonlinear Equations: Mathematical Models, Methods and Applications Ⅱ
edited by
submission deadline 31 Dec 2024 | 8 articles | Viewed by 12906 | Submission Open
Keywords: symmetry operators; mathematical modeling techniques; qualitative properties of solutions; oscillation theory; delay differential equations; ordinary differential/ difference equations; partial/functional equations; fractional differential and integral calculus; applications  
(This special issue belongs to the Section Mathematics)
Symmetry and Approximation Methods II
edited by
submission deadline 31 Dec 2024 | 5 articles | Viewed by 12348 | Submission Open
(This special issue belongs to the Section Mathematics)
Advances on Engineering Graphics: Improvements and New Proposals, Volume 2 submission deadline 31 Dec 2024 | 5 articles | Viewed by 12277 | Submission Open
(This special issue belongs to the Section Computer)
Asymmetric Membranes: Volume 2 submission deadline 31 Dec 2024 | 3 articles | Viewed by 10680 | Submission Open
Keywords: asymmetric membranes; inorganic membranes; polymeric membranes; porous membranes; membrane design
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Advances in Theoretical High Energy Physics - Solving Quantum Field Theory
edited by , Giulia Ricciardi, Francesco Sannino and Gian Paolo Vacca
submission deadline 31 Dec 2024 | 4 articles | Viewed by 10259 | Submission Open
(This special issue belongs to the Section Physics)
Symmetries and Anomalies in Flavour Physics
edited by , Thomas Blake and Farvah Nazila Mahmoudi
submission deadline 31 Dec 2024 | 8 articles | Viewed by 9579 | Submission Open
Keywords: flavor physics; physics beyond the standard model; anomalies; lepton flavor universality; lepto-quarks; Z’
(This special issue belongs to the Section Physics)
Data Driven and Intelligent Aerospace and Robotics Systems submission deadline 31 Dec 2024 | 6 articles | Viewed by 8933 | Submission Open
(This special issue belongs to the Section Computer)
Elementary Fixed Point Theory and Common Fixed Points II submission deadline 31 Dec 2024 | 9 articles | Viewed by 8757 | Submission Open
(This special issue belongs to the Section Mathematics)
Hidden Dark Sector in High Energy Physics
edited by Theodota Lagouri
submission deadline 31 Dec 2024 | 3 articles | Viewed by 8277 | Submission Open
Keywords: high energy collider physics; LHC; hidden dark sector; exotic Higgs decays; dark photon; dark matter (DM); beyond the Standard Model (BSM)
(This special issue belongs to the Section Physics)
Symmetry in Mechanical Engineering: Properties and Applications
edited by , Kun Xu and
submission deadline 31 Dec 2024 | 6 articles | Viewed by 8199 | Submission Open
Keywords: mechanical engineering; symmetric structure; asymmetric structure; mechanical design; machining; MEMS; structural reliability; thermal management; mass transfer; topology optimization
(This special issue belongs to the Section Engineering and Materials)
Symmetry/Asymmetry in Life Sciences: Feature Papers 2024
edited by
submission deadline 31 Dec 2024 | 8 articles | Viewed by 7429 | Submission Open
(This special issue belongs to the Section Life Sciences)
Symmetry in Discrete and Combinatorial Geometry submission deadline 31 Dec 2024 | 2 articles | Viewed by 7305 | Submission Open
Keywords: polyhedra and polytopes; polyhedra and crystallography; crystal nets; polyhedral graphs; and skeletal polyhedral structures; polyhedra and maps on surfaces; tiling; packing; and covering; soft packings; nested clusters; and condensed matter; symmetry groups and reflection groups; discrete point sets; abstract polytopes; polyhedral design
(This special issue belongs to the Section Mathematics)
Symmetry and Chaos in Quantum Mechanics
edited by
submission deadline 31 Dec 2024 | 5 articles | Viewed by 7243 | Submission Open
Keywords: supersymmetry; higher-spin symmetry; discrete symmetry; higher form symmetry; higher categorical symmetry; algebraic structures in quantum systems; quantum phase transition; disorder and quantum chaos; integrability; bootstrap
(This special issue belongs to the Section Physics)
Symmetric and Asymmetric Distributions: New Developments and Applications submission deadline 31 Dec 2024 | 6 articles | Viewed by 6908 | Submission Open
Keywords: applications; Bayesian; regression; reliability; simulation; skewness; survival analysis
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Civil Transportation Engineering
edited by and Renliang Shan
submission deadline 31 Dec 2024 | 5 articles | Viewed by 6582 | Submission Open
Keywords: new building structural systems; excavation and support of large cross-section tunnels; PBA construction method; surrounding rock– support interaction; surface settlement during tunnel excavation; new technologies for geotechnical testing; mechanical properties of frozen rock and soil; environmental geotechnical engineering
(This special issue belongs to the Section Engineering and Materials)
Cyber–Physical Co-regulation and Optimization Methods in Smart Power Systems from the Perspective of Cyber–Physical Symmetry
edited by Bo Zhang, Pei Liu, Yuanai Xie, Haiyan Zhao and
submission deadline 31 Dec 2024 | 5 articles | Viewed by 6500 | Submission Open
Keywords: application of emerging technologies (e.g.; federated learning; digital twin; blockchain; metaverse; AIGC; and B5G) in power systems; collaborative optimization of energy information resources for cyber– physical convergence of smart power systems; cyber– physical– social coupling system technology for smart power systems; smart power emergency communication system based on space– air– ground integration; attack detection and defense cyber– physical smart power systems; key technology for panoramic situation awareness of smart power systems; key technology for secure and efficient data transmission in smart power systems; key technology for safe/high-quality/economic operation and control of cyber– physical smart power systems; key technology for fault location and recovery of smart power systems under extreme disasters; key technology of cyber– physical cooperative defense for endogenous security problems of smart power systems; key technology of data privacy protection and trusted encryption for smart power systems
(This special issue belongs to the Section Engineering and Materials)
Symmetry Applied in Biometrics Technology submission deadline 31 Dec 2024 | 1 articles | Viewed by 6431 | Submission Open
Keywords: biometrics; identification; symmetry; pattern recognition; soft biometrics; safety; security
(This special issue belongs to the Section Computer)
Applications Based on Symmetry/Asymmetry in Fluid Mechanics
edited by Xi Chen
submission deadline 31 Dec 2024 | 7 articles | Viewed by 6263 | Submission Open
(This special issue belongs to the Section Engineering and Materials)
Symmetry and Its Application in Differential Geometry and Topology, 3rd Edition
edited by Tiehong Zhao and
submission deadline 31 Dec 2024 | 8 articles | Viewed by 6120 | Submission Open
Keywords: singularity theory; morse theory/discrete Morse Theory; singularities; singular submanifolds; lightlike submanifolds; biharmonic submanifolds; warped product submanifolds; differentiable manifolds; Submanifold Theory; Legendrian duality; front and frontal; physics; statistics; topological data analysis; computational topology; applied topology and geometry; topological and geometric methods in data analysis; spectral and geometric methods in machine learning and data analysis; persistent homology and cohomology; and applications; neuroscience; cancer biology; genomics; other sciences
(This special issue belongs to the Section Mathematics)
Nonlinear Science and Numerical Simulation with Symmetry submission deadline 31 Dec 2024 | 4 articles | Viewed by 5674 | Submission Open
Keywords: breathers; collapse; dynamical chaos; integrability; pattern formation; reaction– diffusion systems; rogue waves; shock waves; solitons; stability; topological dynamics; vortices; skyrmions; cardiac dynamics; biological applications
(This special issue belongs to the Section Mathematics)
Feature Papers in Mathematics Section
edited by
submission deadline 31 Dec 2024 | 5 articles | Viewed by 5660 | Submission Open
(This special issue belongs to the Section Mathematics)
New Trends on the Mathematical Models and Solitons Arising in Real-World Problems, 2nd Edition submission deadline 31 Dec 2024 | 5 articles | Viewed by 5591 | Submission Open
Keywords: mathematical physics; partial differential equations; epidemic models; basic reproduction number; fractional differential equations; dynamical systems; stability analysis; bifurcation; optimal control
(This special issue belongs to the Section Mathematics)
Symmetry in Green Technologies: Design, Optimization, and Applications submission deadline 31 Dec 2024 | 3 articles | Viewed by 5505 | Submission Open
Keywords: electricity generation with photovoltaic (PV) panels and/or fuel cell (FC) stacks; symmetric power electronics converters such as double dual topologies; power electronics topologies with symmetric switching ripple cancellation; optimization and management of resources in industrial applications; mathematical models for the optimization of symmetric or balanced phenomena; heuristic optimization algorithms and applications; metaheuristic optimization algorithms and applications; new optimization algorithms and applications; optimization of resources in industrial applications
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Functional Equations: Methods, Applications and Mathematical Models submission deadline 31 Dec 2024 | 3 articles | Viewed by 5259 | Submission Open
Keywords: mathematical modelling; numerical methods; random differential equations; optimization problems; engineering applications
(This special issue belongs to the Section Mathematics)
Symmetries and Ultra Dense Matter of Compact Stars II: Emergence of Symmetries in Strong Nuclear Correlations
edited by
submission deadline 31 Dec 2024 | 5 articles | Viewed by 4992 | Submission Open
Keywords: super dense matter; topology change; hadron-quark continuity; IR fixed point; dilatons; vector manifestation; emergent hidden symmetries; chiral-scale effective field theory; generalized density-functional theory; Landau– Migdal Fermi-liquid theory; un-Fermi liquids
(This special issue belongs to the Section Physics)
Symmetry in Hadron Physics
edited by
submission deadline 31 Dec 2024 | 6 articles | Viewed by 4965 | Submission Open
Keywords: hadrons; quantum chromodynamics; baryon spectrum; meson spectrum; multiquark states; exotic states
(This special issue belongs to the Section Physics)
Computational Intelligence and Soft Computing: Recent Applications—Second Volume
edited by
submission deadline 31 Dec 2024 | 4 articles | Viewed by 4898 | Submission Open
Keywords: computational intelligence; soft computing; fuzzy systems; artificial neural networks; connectionist systems; evolutionary algorithms; memetic algorithms; subjective probability; cognitive systems; deep learning; industrial applications; biomedical applications; logistics applications; environmental science applications; management science applications; decision support applications; image processing applications; modeling and algorithms
(This special issue belongs to the Section Computer)
Feature Papers in Section "Engineering and Materials" 2024 submission deadline 31 Dec 2024 | 6 articles | Viewed by 4682 | Submission Open
Keywords: materials engineering; nanotechnology; power systems and thermal engineering; mechanical engineering; mechatronics; and robotics; automation and control engineering; electronic engineering; communication engineering; chemical and molecular engineering; optical engineering and technology; fiber optics technology; mathematical and formal aspects of superconductivity; mechanochemical aspects of aqueous solutions; green chemistry fabrication of materials
(This special issue belongs to the Section Engineering and Materials)
Security Requirements and Challenges of Distributed Intelligent Devices and Applications
edited by Yu Jiang, , Shang Gao and Yuexiu Xing
submission deadline 31 Dec 2024 | 4 articles | Viewed by 4672 | Submission Open
Keywords: distributed device security; physical security of intelligent devices; power terminal security; device vulnerabilities; device data security; secure machine learning technique for data analysis; access authentication for distributed device; multi-agent devices security; new security challenges in distributed devices
(This special issue belongs to the Section Computer)
Symmetry/Asymmetry Studies in Modern Power Systems
edited by , Zhong Chen, Lei Chen and
submission deadline 31 Dec 2024 | 4 articles | Viewed by 4568 | Submission Open
Keywords: power systems; power electronics; symmetrical faults; asymmetrical faults; power system stability; balanced conditions; grid-forming converters
(This special issue belongs to the Section Engineering and Materials)
Advances in Symmetry and Complex Systems
edited by and Qunli Lei
submission deadline 31 Dec 2024 | 3 articles | Viewed by 4394 | Submission Open
Keywords: complex systems; social physics; statistical physics; soft matter physics; symmetry; complex networks; null models; community detection; information or disease spreading; active fluids; disordered hyperuniformity; critical phenomena
(This special issue belongs to the Section Physics)
From Nanoclusters to Nanoparticles: Symmetry, Theory, Experiments, and Applications submission deadline 31 Dec 2024 | 3 articles | Viewed by 3951 | Submission Open
Keywords: reaction dynamics; reaction mechanisms; symmetry properties of clusters; photochemistry; photodissociation dynamics; phase transitions; trajectory simulations; metal clusters; molecular clusters; ionic clusters
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetry/Asymmetry of Differential Equations in Biomathematics
edited by Liang Zhang, Junli Liu and Tailei Zhang
submission deadline 31 Dec 2024 | 4 articles | Viewed by 3881 | Submission Open
Keywords: differential equations; dynamical systems; symmetry/asymmetry; population model; epidemic model; dynamical behavior; simulation
(This special issue belongs to the Section Mathematics)
Symmetry in Mathematical Analysis and Functional Analysis: 3rd Edition submission deadline 31 Dec 2024 | 3 articles | Viewed by 3765 | Submission Open
Keywords: optimization; classical and generalized convexity; inequalities; extension of linear operators; sandwich conditions; moment problems; polynomial approximation; Banach lattices; self-adjoint operators; partial differential equations; dynamical systems; variational inequalities; evolutionary problems
(This special issue belongs to the Section Mathematics)
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