IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-11 DOI: 10.3390/e26100858

Tobias Wand, Oliver Kamps, Hiroshi Iyetomi

引用次数: 0

Maxpro Designs for Experiments with Multiple Types of Branching and Nested Factors. Maxpro 设计具有多种类型分支和嵌套因素的实验。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-10 DOI: 10.3390/e26100856

Feng Yang, Zheng Zhou

引用次数: 0

Hierarchical Controlled Joint Remote Implementation of the Partially Unknown Operations of m Qudits via m High-Dimensional Entangled States. 通过 m 个高维纠缠态实现 m 个 Qudits 的部分未知操作的分层受控联合远程实施。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-10 DOI: 10.3390/e26100857

Ruiheng Jing, Qi Lan, Ping Zhou

引用次数: 0

Density-Density Correlation Spectra of Ultracold Bosonic Gas Released from a Deep 1D Optical Lattice. 从深一维光学晶格中释放的超冷玻色子气体的密度-密度相关光谱

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-10 DOI: 10.3390/e26100854

Yunzhi Tan, Qiang Zhu, Bing Wang, Jingran Shi, Dezhi Xiong, Baolong Lyu

引用次数: 0

Deep Learning for Epileptic Seizure Detection Using a Causal-Spatio-Temporal Model Based on Transfer Entropy. 利用基于转移熵的因果时空模型进行深度学习以检测癫痫发作

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-10 DOI: 10.3390/e26100853

Jie Sun, Jie Xiang, Yanqing Dong, Bin Wang, Mengni Zhou, Jiuhong Ma, Yan Niu

{"title":"Deep Learning for Epileptic Seizure Detection Using a Causal-Spatio-Temporal Model Based on Transfer Entropy.","authors":"Jie Sun, Jie Xiang, Yanqing Dong, Bin Wang, Mengni Zhou, Jiuhong Ma, Yan Niu","doi":"10.3390/e26100853","DOIUrl":"https://doi.org/10.3390/e26100853","url":null,"abstract":"Drug-resistant epilepsy is frequent, persistent, and brings a heavy economic burden to patients and their families. Traditional epilepsy detection methods ignore the causal relationship of seizures and focus on a single time or spatial dimension, and the effect varies greatly in different patients. Therefore, it is necessary to research accurate automatic detection technology of epilepsy in different patients. We propose a causal-spatio-temporal graph attention network (CSTGAT), which uses transfer entropy (TE) to construct a causal graph between multiple channels, combining graph attention network (GAT) and bi-directional long short-term memory (BiLSTM) to capture temporal dynamic correlation and spatial topological structure information. The accuracy, specificity, and sensitivity of the SWEZ dataset were 97.24%, 97.92%, and 98.11%. The accuracy of the private dataset reached 98.55%. The effectiveness of each module was proven through ablation experiments and the impact of different network construction methods was compared. The experimental results indicate that the causal relationship network constructed by TE could accurately capture the information flow of epileptic seizures, and GAT and BiLSTM could capture spatiotemporal dynamic correlations. This model accurately captures causal relationships and spatiotemporal correlations on two datasets, and it overcomes the variability of epileptic seizures in different patients, which may contribute to clinical surgical planning.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"26 10","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11506882/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497275","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

RBFNN-PSO Intelligent Synchronisation Method for Sprott B Chaotic Systems with External Noise and Its Application in an Image Encryption System. 具有外部噪声的 Sprott B 混沌系统的 RBFNN-PSO 智能同步方法及其在图像加密系统中的应用

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-10 DOI: 10.3390/e26100855

Yanpeng Zhang, Jian Zeng, Wenhao Yan, Qun Ding

{"title":"RBFNN-PSO Intelligent Synchronisation Method for Sprott B Chaotic Systems with External Noise and Its Application in an Image Encryption System.","authors":"Yanpeng Zhang, Jian Zeng, Wenhao Yan, Qun Ding","doi":"10.3390/e26100855","DOIUrl":"https://doi.org/10.3390/e26100855","url":null,"abstract":"In the past two decades, research in the field of chaotic synchronization has attracted extensive attention from scholars, and at the same time, more synchronization methods, such as chaotic master-slave synchronization, projection synchronization, sliding film synchronization, fractional-order synchronization and so on, have been proposed and applied to chaotic secure communication. In this paper, based on radial basis function neural network theory and the particle swarm optimisation algorithm, the RBFNN-PSO synchronisation method is proposed for the Sprott B chaotic system with external noise. The RBFNN controller is constructed, and its parameters are used as the particle swarm particle optimisation parameters, and the optimal values of the controller parameters are obtained by the PSO training method, which overcomes the influence of external noise and achieves the synchronisation of the master-slave system. Then, it is shown by numerical simulation and analysis that the scheme has a good performance against external noise. Because the Sprott B system has multiple chaotic attractors with richer dynamics, the synchronization system based on Sprott B chaos is applied to the image encryption system. In particular, the Zigzag disambiguation method for top corner rotation and RGB channel selection is proposed, and the master-slave chaotic system synchronisation sequences are diffused to the disambiguated data streams, respectively. Therefore, the encryption and decryption of image transmission are implemented and the numerical simulation results are given, the random distribution characteristics of encrypted images are analysed using histogram and Shannon entropy methods, and the final results achieve the expected results.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"26 10","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11507833/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497313","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

Enhanced Model for the Analysis of Thermoelectric Effects at Nanoscale: Onsager's Method and Liu's Technique in Comparison. 用于分析纳米尺度热电效应的增强模型：Onsager 方法与 Liu 技术的比较。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-09 DOI: 10.3390/e26100852

Maria Di Domenico, Antonio Sellitto

引用次数: 0

Intelligent-Reflecting-Surface-Assisted Single-Input Single-Output Secure Transmission: A Joint Multiplicative Perturbation and Constructive Reflection Perspective. 智能反射面辅助单输入单输出安全传输：乘法扰动和构造反射的联合视角。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-08 DOI: 10.3390/e26100849

Chaowen Liu, Anling Zeng, Fei Yu, Zhengmin Shi, Mingyang Liu, Boyang Liu

{"title":"Intelligent-Reflecting-Surface-Assisted Single-Input Single-Output Secure Transmission: A Joint Multiplicative Perturbation and Constructive Reflection Perspective.","authors":"Chaowen Liu, Anling Zeng, Fei Yu, Zhengmin Shi, Mingyang Liu, Boyang Liu","doi":"10.3390/e26100849","DOIUrl":"https://doi.org/10.3390/e26100849","url":null,"abstract":"Due to the inherent broadcasting nature and openness of wireless transmission channels, wireless communication systems are vulnerable to the eavesdropping of malicious attackers and usually encounter undesirable situations of information leakage. The problem may be more serious when a passive eavesdropping device is directly connected to the transmitter of a single-input single-output (SISO) system. To deal with this urgent situation, a novel IRS-assisted physical-layer secure transmission scheme based on joint transmitter perturbation and IRS reflection (JPR) is proposed, such that the secrecy of wireless SISO systems can be comprehensively guaranteed regardless of whether the reflection-based jamming from the IRS to the eavesdropper is blocked or not. Moreover, to develop a trade-off between the achievable performance and implementation complexity, we propose both element-wise and group-wise reflected perturbation alignment (ERPA/GRPA)-based IRS reflection strategies, respectively. In order to evaluate the achievable performance, we analyze the ergodic secrecy rate (ESR) and secrecy outage probability (SOP) of the SISO secure systems with the ERPA/GRPA-based JPRs, respectively. Finally, by characterizing the simulated and numerical ESR and SOP performance results, our proposed scheme is compared with the benchmark scheme of random phase-based reflection, which strongly demonstrates the effectiveness of our proposed scheme.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"26 10","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11507133/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497296","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

Development and Experimental Study of Supercritical Flow Payload for Extravehicular Mounting on TZ-6. 用于在 TZ-6 上进行舱外安装的超临界流有效载荷的开发和实验研究。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-08 DOI: 10.3390/e26100847

Liang Guo, Li Duan, Xuemei Zou, Yang Gao, Xiang Zhang, Yewang Su, Jia Wang, Di Wu, Qi Kang

{"title":"Development and Experimental Study of Supercritical Flow Payload for Extravehicular Mounting on TZ-6.","authors":"Liang Guo, Li Duan, Xuemei Zou, Yang Gao, Xiang Zhang, Yewang Su, Jia Wang, Di Wu, Qi Kang","doi":"10.3390/e26100847","DOIUrl":"https://doi.org/10.3390/e26100847","url":null,"abstract":"This paper provides a detailed description of the development and experimental results of the supercritical flow experiment payload carried on the TZ-6 cargo spacecraft, as well as a systematic verification of the out-of-cabin deployment experiment. The technical and engineering indicators of the payload deployment experiment are analyzed, and the functional modules of the payload are shown. The paper provides a detailed description of the design, installation location, size, weight, temperature, illumination, pressure, radiation, control, command reception, telemetry data, downlink data, and experimental procedures for the out-of-cabin payload in the extreme conditions of space. The paper presents the annular liquid surface state and temperature oscillation signals obtained from the space experiment and conducts ground matching experiments to verify the results, providing scientific references for the design and condition setting of space experiments and comparisons for the experimental results to obtain the flow field structure under supercritical conditions. The paper provides a specific summary and discussion of the space fluid science experiment project, providing useful references for future long-term in-orbit scientific research using cargo spacecraft.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"26 10","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11508030/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497278","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

Functional Hypergraphs of Stock Markets. 股票市场的功能超图。

IF 2.1 3区物理与天体物理

Entropy Pub Date : 2024-10-08 DOI: 10.3390/e26100848

Jerry Jones David, Narayan G Sabhahit, Sebastiano Stramaglia, T Di Matteo, Stefano Boccaletti, Sarika Jalan

{"title":"Functional Hypergraphs of Stock Markets.","authors":"Jerry Jones David, Narayan G Sabhahit, Sebastiano Stramaglia, T Di Matteo, Stefano Boccaletti, Sarika Jalan","doi":"10.3390/e26100848","DOIUrl":"https://doi.org/10.3390/e26100848","url":null,"abstract":"In stock markets, nonlinear interdependencies between various companies result in nontrivial time-varying patterns in stock prices. A network representation of these interdependencies has been successful in identifying and understanding hidden signals before major events like stock market crashes. However, these studies have revolved around the assumption that correlations are mediated in a pairwise manner, whereas, in a system as intricate as this, the interactions need not be limited to pairwise only. Here, we introduce a general methodology using information-theoretic tools to construct a higher-order representation of the stock market data, which we call functional hypergraphs. This framework enables us to examine stock market events by analyzing the following functional hypergraph quantities: Forman-Ricci curvature, von Neumann entropy, and eigenvector centrality. We compare the corresponding quantities of networks and hypergraphs to analyze the evolution of both structures and observe features like robustness towards events like crashes during the course of a time period.","PeriodicalId":11694,"journal":{"name":"Entropy","volume":"26 10","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11507234/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497288","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

Entropy最新文献