Fractals最新文献_第2页

Pyramid Channel-based Feature Attention Network with Ensemble Learning based UAV Image Classification on IoT Assisted Remote Sensing Environment 基于金字塔通道的特征注意网络与基于物联网辅助遥感环境的无人机图像分类的集合学习

Fractals Pub Date : 2024-07-17 DOI: 10.1142/s0218348x25400122

Saud S. Alotaibi, Sana Alazwari, Iman Basheti, Omar Alghushairy, Ayman Yafoz, Raed Alsini, F. Alallah

引用次数: 0

FUZZY FRACTIONAL ORDER SLIDING MODE CONTROL FOR OPTIMAL ENERGY CONSUMPTION-TRANSIENT RESPONSE TRADE-OFF IN ROBOTIC SYSTEMS 在机器人系统中实现能耗-瞬态响应权衡最优的模糊分数阶滑动模式控制

Fractals Pub Date : 2024-07-16 DOI: 10.1142/s0218348x24500944

Fatma Abdelhédi, Rim Jallouli Khlif, Ahmed Said Nouri, Nabil Derbel

{"title":"FUZZY FRACTIONAL ORDER SLIDING MODE CONTROL FOR OPTIMAL ENERGY CONSUMPTION-TRANSIENT RESPONSE TRADE-OFF IN ROBOTIC SYSTEMS","authors":"Fatma Abdelhédi, Rim Jallouli Khlif, Ahmed Said Nouri, Nabil Derbel","doi":"10.1142/s0218348x24500944","DOIUrl":"https://doi.org/10.1142/s0218348x24500944","url":null,"abstract":"This work presents a new fuzzy logic parameter tuning-based fractional order sliding mode control (F-FOSMC) strategy for the trajectory tracking of robotic systems. The primary objective is to achieve an optimal control compromise seeking to minimize energy consumption for required motions, all while increasing both accuracy and rapidity of the transient response, addressing therefore a critical challenge in the field of robotics. Our approach integrates a sophisticated fuzzy logic fractional order mechanism to dynamically fine-tune the noninteger derivation parameter of the FOSMC, offering adaptability to varying operational conditions. This intelligent fuzzy logic controller tuning optimizes the FOSMC performance, demonstrates a remarkable capacity to handle uncertainties and disturbances intrinsic to robotic applications and allows to optimize the trade-off between the energy consumption and transient response efficiency throughout the robot’s motion. The effectiveness of the proposed study is thoroughly examined via simulations conducted on a 3 DOF manipulator robotic system. Results showcase that F-FOSMC significantly reduces control energy consumption while preserving rapid and efficient transient response characteristics.","PeriodicalId":501262,"journal":{"name":"Fractals","volume":" 0","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141831824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

USING IFS TO REVEAL BIASES IN THE DISTRIBUTION OF PRIME NUMBERS 用ifs揭示质数分布的偏差

Fractals Pub Date : 2024-07-16 DOI: 10.1142/s0218348x24501032

Harlan J. Brothers

{"title":"USING IFS TO REVEAL BIASES IN THE DISTRIBUTION OF PRIME NUMBERS","authors":"Harlan J. Brothers","doi":"10.1142/s0218348x24501032","DOIUrl":"https://doi.org/10.1142/s0218348x24501032","url":null,"abstract":"It was long assumed that the pseudorandom distribution of prime numbers was free of biases. Specifically, while the prime number theorem gives an asymptotic measure of the probability of finding a prime number and Dirichlet’s theorem on arithmetic progressions tells us about the distribution of primes across residue classes, there was no reason to believe that consecutive primes might “know” anything about each other — that they might, for example, tend to avoid ending in the same digit. Here, we show that the Iterated Function System method (IFS) can be a surprisingly useful tool for revealing such unintuitive results and for more generally studying structure in number theory. Our experimental findings from a study in 2013 include fractal patterns that reveal “repulsive” phenomena among primes in a wide range of classes having specific congruence properties. Some of the phenomena shown in our computations and interpretation relate to more recent work by Lemke Oliver and Soundararajan on biases between consecutive primes. Here, we explore and extend those results by demonstrating how IFS points to the precise manner in which such biases behave from a dynamic standpoint. We also show that, surprisingly, composite numbers can exhibit a notably similar bias.","PeriodicalId":501262,"journal":{"name":"Fractals","volume":" 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141832403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Complexity-Based Analysis in Biomedical Image Analysis: A Review 生物医学图像分析中基于复杂性的分析：综述

Fractals Pub Date : 2024-07-12 DOI: 10.1142/s0218348x24300022

Najmeh Pakniyat, Jamaluddin Abdullah, Ondrej Krejcar, H. Namazi

引用次数: 0

Enhancing Natural Language Processing Using Walrus Optimizer with Self-Attention Deep Learning Model in Applied Linguistics 在应用语言学中使用具有自我注意力深度学习模型的 Walrus 优化器增强自然语言处理能力

Fractals Pub Date : 2024-07-10 DOI: 10.1142/s0218348x25400067

Abdulkhaleq Q. A. Hassan, Alya Alshammari, B. Zaqaibeh, Muhammad Swaileh A. Alzaidi, Randa Allafi, Sana Alazwari, Jawhara Aljabri, Amal M. Nouri

引用次数: 0

MULTIFRACTAL CHARACTERISTICS OF THE MITOCHONDRIAL BK CHANNEL ACTIVITY IN THE PRESENCE OF THE CHANNEL-ACTIVATING FLAVONOIDS 线粒体 bk 通道活性在通道激活类黄酮存在下的多分形特征

Fractals Pub Date : 2024-07-06 DOI: 10.1142/s0218348x24501019

P. Trybek, Ł. Machura, Piotr Bednarczyk, Urszula Cojg, Patrycja Podleśny, Kamila Szumała, Agata WAWRZKIEWICZ-JAŁOWIECKA

{"title":"MULTIFRACTAL CHARACTERISTICS OF THE MITOCHONDRIAL BK CHANNEL ACTIVITY IN THE PRESENCE OF THE CHANNEL-ACTIVATING FLAVONOIDS","authors":"P. Trybek, Ł. Machura, Piotr Bednarczyk, Urszula Cojg, Patrycja Podleśny, Kamila Szumała, Agata WAWRZKIEWICZ-JAŁOWIECKA","doi":"10.1142/s0218348x24501019","DOIUrl":"https://doi.org/10.1142/s0218348x24501019","url":null,"abstract":"Over the years, the (multi)fractal nature of signals describing the activity of ion channels has been observed both at the level of single-channel currents and the temporal scaling of the corresponding sojourns in conducting and non-conducting states. The recognized nonlinear and self-similar properties were interpreted regarding the underlying channel gating machinery. Nevertheless, the literature lacks in (multi)fractal description of the biochemical stimulation of ion channels. Therefore, in this work, we provide a multifractal description of the effects exerted by two different flavonoids — naringenin (Nar) and quercetin (Que) — being the regulators of the large-conductance voltage- and Ca[Formula: see text]-activated K[Formula: see text] channels from the inner mitochondrial membrane (mitoBK). Toward this aim, the focus-based multifractal detrended fluctuation analysis (MFDFA) was applied to the patch-clamp data obtained in the presence of Nar and Que in micromolar concentrations and the corresponding controls. Our results show that mitoBK channel activity has well-pronounced multifractal characteristics and long-range memory (measured by the generalized Hurst exponent) under biochemical stimulation by Nar and Que and in the absence of these substances. The spectral properties significantly change after the randomization of the analyzed series. Therefore, multifractality is an inherent feature of the mitoBK channel currents, which stems from their statistical distribution and temporal organization. Both flavonoids have similar structures and exert channel-activating effects, but they differently affect the parameters of the multifractal spectra of the corresponding patch-clamp signals. Coordination of Que leads to more prominent changes in signal complexity than Nar at membrane hyper- and depolarization. It suggests that this flavonoid has a stronger impact on the conformational dynamics of the mitoBK channels in comparison with naringenin.","PeriodicalId":501262,"journal":{"name":"Fractals","volume":" 45","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141672642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated Indoor Activity Monitoring for Elderly and Visually Impaired People using Quantum Salp Swarm Algorithm with Machine Learning 利用量子 Salp 蜂群算法和机器学习对老年人和视障人士的室内活动进行自动监测

Fractals Pub Date : 2024-07-05 DOI: 10.1142/s0218348x2540002x

Jaber S. Alzahrani, Mohammed Rizwanullah, A. Osman

引用次数: 0

Neutron Point Kinetics Model with a Distributed-Order Fractional Derivative 中子点动力学模型与分布阶分数衍生物

Fractals Pub Date : 2024-07-03 DOI: 10.1142/s0218348x24501068

F. A. Godinez, G. Fernández-Anaya, S. Quezada-García, L. A. Quezada-Téllez, M. Polo-Labarrios

引用次数: 0

Katugampola fractional parameterized inequalities for s-convex function in the fourth sense 第四维 s-凸函数的卡图甘波拉分型参数化不等式

Fractals Pub Date : 2024-07-03 DOI: 10.1142/s0218348x24501081

Yongfang Qi, Guoping Li