International Journal of Applied Mathematics and Computer Science最新文献

Travelling Waves for Low–Grade Glioma Growth and Response to A Chemotherapy Model 低级别胶质瘤生长和对化疗模型反应的游走波

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0041

Agnieszka Bartłomiejczyk, Marek Bodnar, Magdalena U. Bogdańska, M. Piotrowska

引用次数: 0

Robust Flat Filtering Control of a Two Degrees of Freedom Helicopter Subject to Tail Rotor Disturbances 受尾桨扰动影响的双自由度直升机的稳健平滤波控制

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0038

Victor G. Sánchez-Meza, Yair Lozano-Hernández, Octavio Gutiérrez-Frías, N. Lozada-Castillo, A. Luviano‐Juárez

{"title":"Robust Flat Filtering Control of a Two Degrees of Freedom Helicopter Subject to Tail Rotor Disturbances","authors":"Victor G. Sánchez-Meza, Yair Lozano-Hernández, Octavio Gutiérrez-Frías, N. Lozada-Castillo, A. Luviano‐Juárez","doi":"10.34768/amcs-2023-0038","DOIUrl":"https://doi.org/10.34768/amcs-2023-0038","url":null,"abstract":"Abstract This article deals with modelling and a flatness-based robust trajectory tracking scheme for a two degrees of freedom helicopter, which is subject to four types of tail rotor disturbances to validate the control scheme robustness. A mathematical model of the system, its differential flatness and a differential parametrization are obtained. The flat filtering control is designed for the system control with a partially known model, assuming the non-modelled dynamics and the external disturbances (specially the tail rotor ones) to be rejected by means of an extended state model (ultra-local model). Numerical and experimental assessments are carried out on a characterized prototype whose yaw angle (ψ), given by the z axis, is in free form, while the pitch angle (θ), which results from rotation about the y axis, is mechanically restricted. The proposed controller performance is tested through a set of experiments in trajectory tracking tasks with different disturbances in the tail rotor, showing robust behaviour for the different disturbances. Besides, a comparison study against a widely used controller of LQR type is carried out, in which the proposed controller achieves better results, as illustrated by a performance index.","PeriodicalId":50339,"journal":{"name":"International Journal of Applied Mathematics and Computer Science","volume":"457 ","pages":"521 - 535"},"PeriodicalIF":1.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139013718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Choice of the p-norm for High Level Classification Features Pruning in Modern Convolutional Neural Networks With Local Sensitivity Analysis 利用局部灵敏度分析为现代卷积神经网络的高层分类特征剪枝选择 p 准则

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0047

Ernest Jeczmionek, Piotr A. Kowalski

{"title":"Choice of the p-norm for High Level Classification Features Pruning in Modern Convolutional Neural Networks With Local Sensitivity Analysis","authors":"Ernest Jeczmionek, Piotr A. Kowalski","doi":"10.34768/amcs-2023-0047","DOIUrl":"https://doi.org/10.34768/amcs-2023-0047","url":null,"abstract":"Abstract Transfer learning has surfaced as a compelling technique in machine learning, enabling the transfer of knowledge across networks. This study evaluates the efficacy of ImageNet pretrained state-of-the-art networks, including DenseNet, ResNet, and VGG, in implementing transfer learning for prepruned models on compact datasets, such as Fashion MNIST, CIFAR10, and CIFAR100. The primary objective is to reduce the number of neurons while preserving high-level features. To this end, local sensitivity analysis is employed alongside p-norms and various reduction levels. This investigation discovers that VGG16, a network rich in parameters, displays resilience to high-level feature pruning. Conversely, the ResNet architectures reveal an interesting pattern of increased volatility. These observations assist in identifying an optimal combination of the norm and the reduction level for each network architecture, thus offering valuable directions for model-specific optimization. This study marks a significant advance in understanding and implementing effective pruning strategies across diverse network architectures, paving the way for future research and applications.","PeriodicalId":50339,"journal":{"name":"International Journal of Applied Mathematics and Computer Science","volume":"312 1","pages":"663 - 672"},"PeriodicalIF":1.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139019907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distributed Model Reference Control for Synchronization of a Vehicle Platoon with Limited Output Information and Subject to Periodical Intermittent Information 在输出信息有限且受周期性间歇信息影响的情况下，对车辆排进行同步的分布式模型参考控制

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0039

A. Prayitno, V. Indrawati, I. Nilkhamhang

{"title":"Distributed Model Reference Control for Synchronization of a Vehicle Platoon with Limited Output Information and Subject to Periodical Intermittent Information","authors":"A. Prayitno, V. Indrawati, I. Nilkhamhang","doi":"10.34768/amcs-2023-0039","DOIUrl":"https://doi.org/10.34768/amcs-2023-0039","url":null,"abstract":"Abstract Vehicles involved in platoon formation may experience difficulties in obtaining full-state information that can be exchanged and used for controller synthesis. Therefore, a distributed controller based on a model reference and designed utilizing a cooperative observer is proposed for vehicle platoon synchronization. The proposed controller is composed of three main blocks, namely, the reference model, the cooperative observer and the main controller. The reference model is developed by using a homogeneous vehicle platoon that utilizes cooperative full-state information. The cooperative observer is a state estimator which is constructed based on the cooperative output estimation error. It provides state estimates to be used by the main controller. The main controller is constructed from a nominal control and a synchronization input. The nominal control has the main task of tracking the lead vehicle, while in order to reduce the synchronization error, the synchronization input is added by utilizing the cooperative disagreement error. Stability analysis is focused on the vehicle platoon when it is subjected to completely periodical intermittent information. The condition on the information rate is derived for guaranteeing the synchronization of the platoon. Numerical simulation of a vehicle platoon consisting of one leader and five followers is used to examine the performance of the controller.","PeriodicalId":50339,"journal":{"name":"International Journal of Applied Mathematics and Computer Science","volume":"890 ","pages":"537 - 551"},"PeriodicalIF":1.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139022637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Hybrid Mathematical Model for an Optimal Border Closure Policy During a Pandemic 大流行病期间最佳边境关闭政策的混合数学模型

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0042

T. Lazebnik, Labib Shami, S. Bunimovich-Mendrazitsky

{"title":"A Hybrid Mathematical Model for an Optimal Border Closure Policy During a Pandemic","authors":"T. Lazebnik, Labib Shami, S. Bunimovich-Mendrazitsky","doi":"10.34768/amcs-2023-0042","DOIUrl":"https://doi.org/10.34768/amcs-2023-0042","url":null,"abstract":"Abstract During a global health crisis, a country’s borders are a weak point through which carriers from countries with high morbidity rates can enter, endangering the health of the local community and undermining the authorities’ efforts to prevent the spread of the pathogen. Therefore, most countries have adopted some level of border closure policies as one of the first steps in handling pandemics. However, this step involves a significant economic loss, especially for countries that rely on tourism as a source of income. We developed a pioneering model to help decision-makers determine the optimal border closure policies during a health crisis that minimize the magnitude of the outbreak and maximize the revenue of the tourism industry. This approach is based on a hybrid mathematical model that consists of an epidemiological sub-model with tourism and a pandemic-focused economic sub-model, which relies on elements from the field of artificial intelligence to provide policymakers with a data-driven model for a border closure strategy for tourism during a global pandemic.","PeriodicalId":50339,"journal":{"name":"International Journal of Applied Mathematics and Computer Science","volume":"143 ","pages":"583 - 601"},"PeriodicalIF":1.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139024288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

2–D Lossless FIR Filter Design Using Synthesis of the Paraunitary Transfer Function Matrix 利用准单元传递函数矩阵合成的二维无损 FIR 滤波器设计

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0048

Krzysztof Wawryn, P. Poczekajlo

引用次数: 0

Improving Security Performance of Healthcare Data in the Internet of Medical Things using a Hybrid Metaheuristic Model 利用混合元搜索模型提高医疗物联网中医疗数据的安全性能

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0044

Kanneboina Ashok, Sundaram Gopikrishnan

{"title":"Improving Security Performance of Healthcare Data in the Internet of Medical Things using a Hybrid Metaheuristic Model","authors":"Kanneboina Ashok, Sundaram Gopikrishnan","doi":"10.34768/amcs-2023-0044","DOIUrl":"https://doi.org/10.34768/amcs-2023-0044","url":null,"abstract":"Abstract Internet of medical things (IoMT) network design integrates multiple healthcare devices to improve patient monitoring and real-time care operations. These networks use a wide range of devices to make critical patient care decisions. Thus, researchers have deployed multiple high-security frameworks with encryption, hashing, privacy preservation, attribute based access control, and more to secure these devices and networks. However, real-time monitoring security models are either complex or unreconfigurable. The existing models’ security depends on their internal configuration, which is rarely extensible for new attacks. This paper introduces a hybrid metaheuristic model to improve healthcare IoT security performance. The blockchain based model can be dynamically reconfigured by changing its encryption and hashing standards. The proposed model then continuously optimizes blockchain based IoMT deployment security and QoS performance using elephant herding optimization (EHO) and grey wolf optimization (GWO). Dual fitness functions improve security and QoS for multiple attack types in the proposed model. These fitness functions help reconfigure encryption and hashing parameters to improve performance under different attack configurations. The hybrid integration of EH and GW optimization models can tune blockchain based deployment for dynamic attack scenarios, making it scalable and useful for real-time scenarios. The model is tested under masquerading, Sybil, man-in-the-middle, and DDoS attacks and is compared with state-of-the-art models. The proposed model has 8.3% faster attack detection and mitigation, 5.9% better throughput, a 6.5% higher packet delivery ratio, and 10.3% better network consistency under attack scenarios. This performance enables real-time healthcare use cases for the proposed model.","PeriodicalId":50339,"journal":{"name":"International Journal of Applied Mathematics and Computer Science","volume":"359 1","pages":"623 - 636"},"PeriodicalIF":1.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138989725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Claim Modeling and Insurance Premium Pricing Under A Bonus–Malus System in Motor Insurance 汽车保险中奖金-分红制度下的索赔建模和保险费定价

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0045

W. Ieosanurak, Banphatree Khomkham, A. Moumeesri

{"title":"Claim Modeling and Insurance Premium Pricing Under A Bonus–Malus System in Motor Insurance","authors":"W. Ieosanurak, Banphatree Khomkham, A. Moumeesri","doi":"10.34768/amcs-2023-0045","DOIUrl":"https://doi.org/10.34768/amcs-2023-0045","url":null,"abstract":"Abstract Accurately modeling claims data and determining appropriate insurance premiums are vital responsibilities for non-life insurance firms. This article presents novel models for claims that offer improved precision in fitting claim data, both in terms of claim frequency and severity. Specifically, we suggest the Poisson-GaL distribution for claim frequency and the exponential-GaL distribution for claim severity. The traditional method of assigning automobile premiums based on a bonus-malus system relies solely on the number of claims made. However, this may lead to unfair outcomes when an insured individual with a minor severity claim is charged the same premium as someone with a severe claim. The second aim of this article is to propose a new model for calculating bonus-malus premiums. Our proposed model takes into account both the number and size of claims, which follow the Poisson-GaL distribution and the exponential-GaL distribution, respectively. To calculate the premiums, we employ the Bayesian approach. Real-world data are used in practical examples to illustrate how the proposed model can be implemented. The results of our analysis indicate that the proposed premium model effectively resolves the issue of overcharging. Moreover, the proposed model produces premiums that are more tailored to policyholders’ claim histories, benefiting both the policyholders and the insurance companies. This advantage can contribute to the growth of the insurance industry and provide a competitive edge in the insurance market.","PeriodicalId":50339,"journal":{"name":"International Journal of Applied Mathematics and Computer Science","volume":"15 ","pages":"637 - 650"},"PeriodicalIF":1.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139024631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Denseformer for Single Image Deraining 用于单幅图像去毛刺的密集成形器

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0046

Tianming Wang, Kaige Wang, Qing Li

引用次数: 0

Zeroing the Transfer Matrix of the Roesser Model of 2–D Linear Systems 将二维线性系统罗塞模型的传递矩阵归零

IF 1.9 4区计算机科学

International Journal of Applied Mathematics and Computer Science Pub Date : 2023-12-01 DOI: 10.34768/amcs-2023-0037

Tadeusz Kaczorek

引用次数: 0