IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-12 DOI: 10.3390/e27050516

Qiujuan Tong, Xiaolong Xu, Jianke Zhang, Huawei Xu

{"title":"Public Opinion Propagation Prediction Model Based on Dynamic Time-Weighted Rényi Entropy and Graph Neural Network.","authors":"Qiujuan Tong, Xiaolong Xu, Jianke Zhang, Huawei Xu","doi":"10.3390/e27050516","DOIUrl":"https://doi.org/10.3390/e27050516","url":null,"abstract":"Current methods for public opinion propagation prediction struggle to jointly model temporal dynamics, structural complexity, and dynamic node influence in evolving social networks. To overcome these limitations, this paper proposes a public opinion dissemination prediction model based on the integration of dynamic time-weighted Rényi entropy (DTWRE) and graph neural networks. By incorporating a time-weighted mechanism, the model devises two tiers of Rényi entropy metrics-local node entropy and global time-step entropy-to effectively quantify the uncertainty and complexity of network topology at different time points. Simultaneously, by integrating DTWRE features with high-dimensional node embeddings generated by Node2Vec and utilizing GraphSAGE to construct a spatiotemporal fusion modeling framework, the model achieves precise prediction of link formation and key node identification in public opinion dissemination. The model was validated on multiple public opinion datasets, and the results indicate that, compared to baseline methods, it exhibits significant advantages in several evaluation metrics such as AUC, thereby fully demonstrating the effectiveness of the dynamic time-weighted mechanism in capturing the temporal evolution of public opinion dissemination and the dynamic changes in network structure.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 5","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144149464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparing Singlet Testing Schemes. 单线态测试方案比较。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-11 DOI: 10.3390/e27050515

George Cowperthwaite, Adrian Kent

引用次数: 0

A Deflationary Account of Information in Terms of Probability. 从概率的角度对信息进行通货紧缩的描述。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-11 DOI: 10.3390/e27050514

Riccardo Manzotti

引用次数: 0

Characterization of the Performance of an XXZ Three-Spin Quantum Battery. XXZ三自旋量子电池的性能表征。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-10 DOI: 10.3390/e27050511

Suman Chand, Dario Ferraro, Niccolò Traverso Ziani

{"title":"Characterization of the Performance of an XXZ Three-Spin Quantum Battery.","authors":"Suman Chand, Dario Ferraro, Niccolò Traverso Ziani","doi":"10.3390/e27050511","DOIUrl":"https://doi.org/10.3390/e27050511","url":null,"abstract":"Quantum batteries represent a new and promising technological application of quantum mechanics, offering the potential for enhanced energy storage and fast charging. In this work, we study a quantum battery composed of three two-level systems with XXZ coupling operating under open boundary conditions. We investigate the role played by ferromagnetic and antiferromagnetic initial configurations on the charging dynamics of the battery. Two charging mechanisms are explored: static charging, where the battery interacts with a constant classical external field, and harmonic charging, where the field oscillates periodically over time. Our results demonstrate that static charging can be more efficient in the ferromagnetic case, achieving maximum energy due to complete population inversion between the ground and excited states. In contrast, harmonic charging excels in the antiferromagnetic case. By analyzing the stored energy and the average charging power in these two regimes, we highlight the impact of anisotropy on the performance of quantum batteries. Our findings provide valuable insights for optimizing quantum battery performance based on the system's initial state and coupling configuration, paving the way for the study of more efficient quantum devices for energy storage.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 5","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144149712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fault Diagnosis of Planetary Gearbox Based on Hierarchical Refined Composite Multiscale Fuzzy Entropy and Optimized LSSVM. 基于层次精化复合多尺度模糊熵和优化LSSVM的行星齿轮箱故障诊断。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-10 DOI: 10.3390/e27050512

Xin Xia, Xiaolu Wang

引用次数: 0

A Novel One-Dimensional Chaotic System for Image Encryption in Network Transmission Through Base64 Encoding. 基于Base64编码的网络传输图像加密的一维混沌系统。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-10 DOI: 10.3390/e27050513

Linqing Huang, Qingye Huang, Han Chen, Shuting Cai, Xiaoming Xiong, Jian Yang

{"title":"A Novel One-Dimensional Chaotic System for Image Encryption in Network Transmission Through Base64 Encoding.","authors":"Linqing Huang, Qingye Huang, Han Chen, Shuting Cai, Xiaoming Xiong, Jian Yang","doi":"10.3390/e27050513","DOIUrl":"https://doi.org/10.3390/e27050513","url":null,"abstract":"Continuous advancements in digital image transmission technology within network environments have heightened the necessity for secure, convenient, and well-suited image encryption systems. Base64 encoding possesses the ability to convert raw data into printable ASCII characters, facilitating excellent stability transmission across various communication protocols. In this paper, base64 encoding is first used in image encryption to pursue high application value in network transmission. First, a novel one-dimensional discrete chaotic system (1D-LSCM) with complex chaotic behavior is introduced and extensively tested. Second, a new multi-image encryption algorithm based on the proposed 1D-LSCM and base64 encoding is presented. Technically, three original grayscale images are constructed as a color image and encoded in base64 characters. To purse high plaintext sensitivity, the original image is input to the SHA-256 hash function and its output is used to influence the generated keystream employed in the permutation and diffusion process. After scramble and diffusion operations, the base64 ciphertext is obtained. Finally, test results derived from comprehensive tests prove that our proposed algorithm has remarkable security and encryption efficiency.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 5","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144149672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-Plane Gradient Magnetic Field-Induced Topological Defects in Rotating Spin-1 Bose-Einstein Condensates with SU(3) Spin-Orbit Coupling. SU(3)自旋-轨道耦合旋转自旋-1玻色-爱因斯坦凝聚体的面内梯度磁场诱导拓扑缺陷。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-09 DOI: 10.3390/e27050508

Hui Yang, Peng-Yu Li, Bo Yu

{"title":"In-Plane Gradient Magnetic Field-Induced Topological Defects in Rotating Spin-1 Bose-Einstein Condensates with SU(3) Spin-Orbit Coupling.","authors":"Hui Yang, Peng-Yu Li, Bo Yu","doi":"10.3390/e27050508","DOIUrl":"https://doi.org/10.3390/e27050508","url":null,"abstract":"We study the topological defects and spin structures of rotating SU(3) spin-orbit-coupled spin F=1 Bose-Einstein condensates (BECs) in an in-plane quadrupole field with ferromagnetic spin interaction, and the BECs is confined by a harmonic trap. Without rotation, as the quadrupole field strength is increased, the spin F=1 BECs with SU(3) spin-orbit coupling (SOC) evolves from the initial Thomas-Fermi phase into the stripe phase; then, it enters a vortex-antivortex cluster state and eventually a polar-core vortex state. In the absence of rotation with the given quadrupole field, the enhancing SU(3) SOC strength can cause a phase transition from a central Mermin-Ho vortex to a vortex-antivortex cluster, subsequently converting to a bending vortex-antivortex chain. In addition, when considering rotation, it is found that this system generates the following five typical quantum phases: a three-vortex-chain cluster structure with mutual angles of approximately 2π3, a tree-fork-like vortex chain cluster, a rotationally symmetric vortex necklace, a diagonal vortex chain cluster, and a density hole vortex cluster. Particularly, the system exhibits unusual topological structures and spin textures, such as a bending half-skyrmion-half-antiskyrmion (meron-antimeron) chain, three half-skyrmion (meron) chains with mutual angles of an approximately 2π3, slightly curved diagonal half-skyrmion (meron) cluster lattice, a skyrmion-half-skyrmion (skyrmion-meron) necklace, and a tree-fork-like half-skyrmion (meron) chain cluster lattice.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 5","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144149796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Underlying Geometric Flow in Hamiltonian Evolution. 哈密顿演化中的潜在几何流。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-09 DOI: 10.3390/e27050510

Gil Elgressy, Lawrence Horwitz

引用次数: 0

Jean-Marie Souriau's Symplectic Foliation Model of Sadi Carnot's Thermodynamics. Jean-Marie Souriau的Sadi Carnot热力学的辛叶分模型。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-09 DOI: 10.3390/e27050509

Frédéric Barbaresco

{"title":"Jean-Marie Souriau's Symplectic Foliation Model of Sadi Carnot's Thermodynamics.","authors":"Frédéric Barbaresco","doi":"10.3390/e27050509","DOIUrl":"https://doi.org/10.3390/e27050509","url":null,"abstract":"The explanation of thermodynamics through geometric models was initiated by seminal figures such as Carnot, Gibbs, Duhem, Reeb, and Carathéodory. Only recently, however, has the symplectic foliation model, introduced within the domain of geometric statistical mechanics, provided a geometric definition of entropy as an invariant Casimir function on symplectic leaves-specifically, the coadjoint orbits of the Lie group acting on the system, where these orbits are interpreted as level sets of entropy. We present a symplectic foliation interpretation of thermodynamics, based on Jean-Marie Souriau's Lie group thermodynamics. This model offers a Lie algebra cohomological characterization of entropy, viewed as an invariant Casimir function in the coadjoint representation. The dual space of the Lie algebra is foliated into coadjoint orbits, which are identified with the level sets of entropy. Within the framework of thermodynamics, dynamics on symplectic leaves-described by the Poisson bracket-are associated with non-dissipative phenomena. Conversely, on the transversal Riemannian foliation (defined by the level sets of energy), the dynamics, characterized by the metric flow bracket, induce entropy production as transitions occur from one symplectic leaf to another.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 5","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144150004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative Assessment of the Trigger Effect of Proton Flux on Seismicity. 质子通量对地震活动性触发效应的定量评估。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2025-05-08 DOI: 10.3390/e27050505

Alexey Lyubushin, Eugeny Rodionov

{"title":"Quantitative Assessment of the Trigger Effect of Proton Flux on Seismicity.","authors":"Alexey Lyubushin, Eugeny Rodionov","doi":"10.3390/e27050505","DOIUrl":"https://doi.org/10.3390/e27050505","url":null,"abstract":"An estimate of the trigger effect of the proton flux on seismicity was obtained. The proton flux time series with a time step of 5 min, 2000-2024, was analyzed. In each time interval of 5 days, statistics of the proton flux time series were calculated: mean values, logarithm of kurtosis, spectral slope, singularities spectrum support width, wavelet-based entropy, and the Donoho-Johnston wavelet-based index. For each of the used statistics, time points of local extrema were found, and for each pair of time sequences of proton flux statistics and earthquakes with a magnitude of at least 6.5 in sliding time windows, the \"advance measures\" of each time sequence relative to the other were estimated using a model of the intensity of interacting point processes. The difference between the \"direct\" measure of the advance of time points of local extrema of proton flux statistics relative to the time moments of earthquakes and the \"inverse\" measure of the advance was calculated. The maximum proportion of the intensity of seismic events for which the proton flux was a trigger was estimated as 0.28 for using the points of the local minima of the singularities spectrum support width.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 5","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144149473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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