IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-15 DOI: 10.3390/e27070753

Mengdi Zhao, Huiyan Chen

{"title":"Identity-Based Provable Data Possession with Designated Verifier from Lattices for Cloud Computing.","authors":"Mengdi Zhao, Huiyan Chen","doi":"10.3390/e27070753","DOIUrl":"10.3390/e27070753","url":null,"abstract":"Provable data possession (PDP) is a technique that enables the verification of data integrity in cloud storage without the need to download the data. PDP schemes are generally categorized into public and private verification. Public verification allows third parties to assess the integrity of outsourced data, offering good openness and flexibility, but it may lead to privacy leakage and security risks. In contrast, private verification restricts the auditing capability to the data owner, providing better privacy protection but often resulting in higher verification costs and operational complexity due to limited local resources. Moreover, most existing PDP schemes are based on classical number-theoretic assumptions, making them vulnerable to quantum attacks. To address these challenges, this paper proposes an identity-based PDP with a designated verifier over lattices, utilizing a specially leveled identity-based fully homomorphic signature (IB-FHS) scheme. We provide a formal security proof of the proposed scheme under the small-integer solution (SIS) and learning with errors (LWE) within the random oracle model. Theoretical analysis confirms that the scheme achieves security guarantees while maintaining practical feasibility. Furthermore, simulation-based experiments show that for a 1 MB file and lattice dimension of n = 128, the computation times for core algorithms such as TagGen, GenProof, and CheckProof are approximately 20.76 s, 13.75 s, and 3.33 s, respectively. Compared to existing lattice-based PDP schemes, the proposed scheme introduces additional overhead due to the designated verifier mechanism; however, it achieves a well-balanced optimization among functionality, security, and efficiency.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12294395/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144728859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Statistical Mechanics of Linear k-mer Lattice Gases: From Theory to Applications. 线性k-mer晶格气体的统计力学：从理论到应用。

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-14 DOI: 10.3390/e27070750

Julian Jose Riccardo, Pedro Marcelo Pasinetti, Jose Luis Riccardo, Antonio Jose Ramirez-Pastor

{"title":"Statistical Mechanics of Linear k-mer Lattice Gases: From Theory to Applications.","authors":"Julian Jose Riccardo, Pedro Marcelo Pasinetti, Jose Luis Riccardo, Antonio Jose Ramirez-Pastor","doi":"10.3390/e27070750","DOIUrl":"10.3390/e27070750","url":null,"abstract":"The statistical mechanics of structured particles with arbitrary size and shape adsorbed onto discrete lattices presents a longstanding theoretical challenge, mainly due to complex spatial correlations and entropic effects that emerge at finite densities. Even for simplified systems such as hard-core linear k-mers, exact solutions remain limited to low-dimensional or highly constrained cases. In this review, we summarize the main theoretical approaches developed by our research group over the past three decades to describe adsorption phenomena involving linear k-mers-also known as multisite occupancy adsorption-on regular lattices. We examine modern approximations such as an extension to two dimensions of the exact thermodynamic functions obtained in one dimension, the Fractional Statistical Theory of Adsorption based on Haldane's fractional statistics, and the so-called Occupation Balance based on expansion of the reciprocal of the fugacity, and hybrid approaches such as the semi-empirical model obtained by combining exact one-dimensional calculations and the Guggenheim-DiMarzio approach. For interacting systems, statistical thermodynamics is explored within generalized Bragg-Williams and quasi-chemical frameworks. Particular focus is given to the recently proposed Multiple Exclusion statistics, which capture the correlated exclusion effects inherent to non-monomeric particles. Applications to monolayer and multilayer adsorption are analyzed, with relevance to hydrocarbon separation technologies. Finally, computational strategies, including advanced Monte Carlo techniques, are reviewed in the context of high-density regimes. This work provides a unified framework for understanding entropic and cooperative effects in lattice-adsorbed polyatomic systems and highlights promising directions for future theoretical and computational research.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12294319/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144728923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Revised Bimodal Generalized Extreme Value Distribution: Theory and Climate Data Application. 修正的双峰广义极值分布：理论与气候资料应用。

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-14 DOI: 10.3390/e27070749

Cira E G Otiniano, Mathews N S Lisboa, Terezinha K A Ribeiro

引用次数: 0

An Exergy-Enhanced Improved IGDT-Based Optimal Scheduling Model for Electricity-Hydrogen Urban Integrated Energy Systems. 基于火用增强的改进igdt的电氢城市综合能源系统最优调度模型。

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-13 DOI: 10.3390/e27070748

Min Xie, Lei Qing, Jia-Nan Ye, Yan-Xuan Lu

{"title":"An Exergy-Enhanced Improved IGDT-Based Optimal Scheduling Model for Electricity-Hydrogen Urban Integrated Energy Systems.","authors":"Min Xie, Lei Qing, Jia-Nan Ye, Yan-Xuan Lu","doi":"10.3390/e27070748","DOIUrl":"10.3390/e27070748","url":null,"abstract":"Urban integrated energy systems (UIESs) play a critical role in facilitating low-carbon and high-efficiency energy transitions. However, existing scheduling strategies predominantly focus on energy quantity and cost, often neglecting the heterogeneity of energy quality across electricity, heat, gas, and hydrogen. This paper presents an exergy-enhanced stochastic optimization framework for the optimal scheduling of electricity-hydrogen urban integrated energy systems (EHUIESs) under multiple uncertainties. By incorporating exergy efficiency evaluation into a Stochastic Optimization-Improved Information Gap Decision Theory (SOI-IGDT) framework, the model dynamically balances economic cost with thermodynamic performance. A penalty-based iterative mechanism is introduced to track exergy deviations and guide the system toward higher energy quality. The proposed approach accounts for uncertainties in renewable output, load variation, and Hydrogen-enriched compressed natural gas (HCNG) combustion. Case studies based on a 186-bus UIES coupled with a 20-node HCNG network show that the method improves exergy efficiency by up to 2.18% while maintaining cost robustness across varying confidence levels. These results underscore the significance of integrating exergy into real-time robust optimization for resilient and high-quality energy scheduling.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12295888/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144728822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Multimodal Semantic-Enhanced Attention Network for Fake News Detection. 一种用于假新闻检测的多模态语义增强注意网络。

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-12 DOI: 10.3390/e27070746

Weijie Chen, Yuzhuo Dang, Xin Zhang

{"title":"A Multimodal Semantic-Enhanced Attention Network for Fake News Detection.","authors":"Weijie Chen, Yuzhuo Dang, Xin Zhang","doi":"10.3390/e27070746","DOIUrl":"10.3390/e27070746","url":null,"abstract":"The proliferation of social media platforms has triggered an unprecedented increase in multimodal fake news, creating pressing challenges for content authenticity verification. Current fake news detection systems predominantly rely on isolated unimodal analysis (text or image), failing to exploit critical cross-modal correlations or leverage latent social context cues. To bridge this gap, we introduce the SCCN (Semantic-enhanced Cross-modal Co-attention Network), a novel framework that synergistically combines multimodal features with refined social graph signals. Our approach innovatively combines text, image, and social relation features through a hierarchical fusion framework. First, we extract modality-specific features and enhance semantics by identifying entities in both text and visual data. Second, an improved co-attention mechanism selectively integrates social relations while removing irrelevant connections to reduce noise and exploring latent informative links. Finally, the model is optimized via cross-entropy loss with entropy minimization. Experimental results for benchmark datasets (PHEME and Weibo) show that SCCN consistently outperforms existing approaches, achieving relative accuracy enhancements of 1.7% and 1.6% over the best-performing baseline methods in each dataset.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12294598/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144728817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Grain Size Distribution on Frictional Wear and Corrosion Properties of (FeCoNi)₈₆Al₇Ti₇ High-Entropy Alloys. 晶粒尺寸分布对（FeCoNi）86Al7Ti7高熵合金摩擦磨损和腐蚀性能的影响

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-12 DOI: 10.3390/e27070747

Qinhu Sun, Pan Ma, Hong Yang, Kaiqiang Xie, Shiguang Wan, Chunqi Sheng, Zhibo Chen, Hongji Yang, Yandong Jia, Konda Gokuldoss Prashanth

{"title":"Effect of Grain Size Distribution on Frictional Wear and Corrosion Properties of (FeCoNi)86Al7Ti7 High-Entropy Alloys.","authors":"Qinhu Sun, Pan Ma, Hong Yang, Kaiqiang Xie, Shiguang Wan, Chunqi Sheng, Zhibo Chen, Hongji Yang, Yandong Jia, Konda Gokuldoss Prashanth","doi":"10.3390/e27070747","DOIUrl":"10.3390/e27070747","url":null,"abstract":"Optimization of grain size distribution in high-entropy alloys (HEAs) is a promising design strategy to overcome wear and corrosion resistance. In this study, a (FeCoNi)86Al7Ti7 high-entropy alloy with customized isometric and heterogeneous structure, as well as fine-crystal isometric design by SPS, is investigated for microstructure, surface morphology, hardness, frictional wear, and corrosion resistance. The effects of the SPS process on the microstructure and mechanical behavior are elucidated, and the frictional wear and corrosion resistance of the alloys are improved with heterogeneous structural fine-grain strengthening and uniform fine-grain strengthening. The wear mechanisms and corrosion behavior mechanisms of (FeCoNi)86Al7Ti7 HEAs with different phase structure designs are elaborated. This work highlights the potential of using powder metallurgy to efficiently and precisely control and optimize the multi-scale microstructure of high-entropy alloys, thereby improving their frictional wear and corrosion properties in demanding applications.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12295256/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144728796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermalization in Asymmetric Harmonic Chains. 不对称谐波链中的热化现象。

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-11 DOI: 10.3390/e27070741

Weicheng Fu, Sihan Feng, Yong Zhang, Hong Zhao

引用次数: 0

Dynamic Balance: A Thermodynamic Principle for the Emergence of the Golden Ratio in Open Non-Equilibrium Steady States. 动态平衡：开放非平衡稳态中黄金比例出现的热力学原理。

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-11 DOI: 10.3390/e27070745

Alejandro Ruiz

{"title":"Dynamic Balance: A Thermodynamic Principle for the Emergence of the Golden Ratio in Open Non-Equilibrium Steady States.","authors":"Alejandro Ruiz","doi":"10.3390/e27070745","DOIUrl":"10.3390/e27070745","url":null,"abstract":"We develop a symmetry-based variational theory that shows the coarse-grained balance of work inflow to heat outflow in a driven, dissipative system relaxed to the golden ratio. Two order-2 Möbius transformations-a self-dual flip and a self-similar shift-generate a discrete non-abelian subgroup of PGL(2,Q(5)). Requiring any smooth, strictly convex Lyapunov functional to be invariant under both maps enforces a single non-equilibrium fixed point: the golden mean. We confirm this result by (i) a gradient-flow partial-differential equation, (ii) a birth-death Markov chain whose continuum limit is Fokker-Planck, (iii) a Martin-Siggia-Rose field theory, and (iv) exact Ward identities that protect the fixed point against noise. Microscopic kinetics merely set the approach rate; three parameter-free invariants emerge: a 62%:38% split between entropy production and useful power, an RG-invariant diffusion coefficient linking relaxation time and correlation length Dα=ξz/τ, and a ϑ=45∘ eigen-angle that maps to the golden logarithmic spiral. The same dual symmetry underlies scaling laws in rotating turbulence, plant phyllotaxis, cortical avalanches, quantum critical metals, and even de-Sitter cosmology, providing a falsifiable, unifying principle for pattern formation far from equilibrium.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12294351/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144728794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing s-CO₂ Brayton Power Cycle Efficiency in Cold Ambient Conditions Through Working Fluid Blends. 通过工作流体混合物提高冷环境条件下s-CO2布雷顿动力循环效率。

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-11 DOI: 10.3390/e27070744

Paul Tafur-Escanta, Luis Coco-Enríquez, Robert Valencia-Chapi, Javier Muñoz-Antón

{"title":"Enhancing s-CO2 Brayton Power Cycle Efficiency in Cold Ambient Conditions Through Working Fluid Blends.","authors":"Paul Tafur-Escanta, Luis Coco-Enríquez, Robert Valencia-Chapi, Javier Muñoz-Antón","doi":"10.3390/e27070744","DOIUrl":"10.3390/e27070744","url":null,"abstract":"Supercritical carbon dioxide (s-CO2) Brayton cycles have emerged as a promising technology for high-efficiency power generation, owing to their compact architecture and favorable thermophysical properties. However, their performance degrades significantly under cold-climate conditions-such as those encountered in Greenland, Russia, Canada, Scandinavia, and Alaska-due to the proximity to the fluid's critical point. This study investigates the behavior of the recompression Brayton cycle (RBC) under subzero ambient temperatures through the incorporation of low-critical-temperature additives to create CO2-based binary mixtures. The working fluids examined include methane (CH4), tetrafluoromethane (CF4), nitrogen trifluoride (NF3), and krypton (Kr). Simulation results show that CH4- and CF4-rich mixtures can achieve thermal efficiency improvements of up to 10 percentage points over pure CO2. NF3-containing blends yield solid performance in moderately cold environments, while Kr-based mixtures provide modest but consistent efficiency gains. At low compressor inlet temperatures, the high-temperature recuperator (HTR) becomes the dominant performance-limiting component. Optimal distribution of recuperator conductance (UA) favors increased HTR sizing when mixtures are employed, ensuring effective heat recovery across larger temperature differentials. The study concludes with a comparative exergy analysis between pure CO2 and mixture-based cycles in RBC architecture. The findings highlight the potential of custom-tailored working fluids to enhance thermodynamic performance and operational stability of s-CO2 power systems under cold-climate conditions.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12294155/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144728801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust Fractional Low Order Adaptive Linear Chirplet Transform and Its Application to Fault Analysis. 鲁棒分数阶低阶自适应线性小波变换及其在故障分析中的应用。

IF 2 3区物理与天体物理

Entropy Pub Date : 2025-07-11 DOI: 10.3390/e27070742

Junbo Long, Changshou Deng, Haibin Wang, Youxue Zhou

{"title":"Robust Fractional Low Order Adaptive Linear Chirplet Transform and Its Application to Fault Analysis.","authors":"Junbo Long, Changshou Deng, Haibin Wang, Youxue Zhou","doi":"10.3390/e27070742","DOIUrl":"10.3390/e27070742","url":null,"abstract":"Time-frequency analysis (TFA) technology is an important tool for analyzing non-Gaussian mechanical fault vibration signals. In the complex background of infinite variance process noise and Gaussian colored noise, it is difficult for traditional methods to obtain the highly concentrated time-frequency representation (TFR) of fault vibration signals. Based on the insensitive property of fractional low-order statistics for infinite variance and Gaussian processes, robust fractional lower order adaptive linear chirplet transform (FLOACT) and fractional lower order adaptive scaling chirplet transform (FLOASCT) methods are proposed to suppress the mixed complex noise in this paper. The calculation steps and processes of the algorithms are summarized and deduced in detail. The experimental simulation results show that the improved FLOACT and FLOASCT methods have good effects on multi-component signals with short frequency intervals in the time-frequency domain and even cross-frequency trajectories in the strong impulse background noise environment. Finally, the proposed methods are applied to the feature analysis and extraction of the mechanical outer race fault vibration signals in complex background environments, and the results show that they have good estimation accuracy and effectiveness in lower MSNR, which indicate their robustness and adaptability.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"27 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12294206/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144728918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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