检索结果-内蒙古大学图书馆

Mathematical model of COVID-19 dynamics in the presence of multiple controls

Quality and Quantity 2024年第1期59卷 261-290页

作者： Akanni, J.O. Fatmawati Ajao, S. Asamoah, J.K.K. Abimbade, S.F. Department of Mathematical and Computing Sciences Koladaisi University Oyo State Ibadan Nigeria Department of Mathematics Faculty of Science and Technology Universitas Airlangga Surabaya 60115 Indonesia Department of Mathematics and Computer Science Elizade University Ondo State Ilara-Mokin Nigeria Department of Mathematics Saveetha School of Engineering SIMATS Chennai India Department of Mathematics Kwame Nkrumah University of Science and Technology Kumasi Ghana Department of Pure and Applied Mathematics Ladoke Akintola University of Technology Oyo State Ogbomoso Nigeria

The coronavirus disease 19 (COVID-19), caused by the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-COV-2), is an infectious disease constituting the most significant challenge to human and socio-economic development across the globe. Many studies have been conducted to gain more knowledge on the dynamic spread of SARS-COV-2 in the community of people. In this study, a new mathematical model made up of a system of non-linear ODEs is designed and meticulously analyzed to understand the dynamics of transmission of COVID-19. Specific necessary properties exhibited by the COVID-19 model are examined through the theory of non-negativity and boundedness of solutions. The threshold parameter measuring the invasion potential of COVID-19 in the population is worked out by employing the Next Generation Matrix approach. The model is shown to have two endemic equilibria whenever basic reproduction number R₀<1. The analysis of the endemic equilibrium stability is explored using a suitably constructed Lyapunov function. It is shown that the COVID-19 model is globally asymptotically stable whenever the associated basic reproduction number is beyond unity. The Latin Hypercube Sampling or Partial Rank Correlation Coefficient is utilized to examine how parameter changes affect the COVID-19 spread in the population. Furthermore, the study considers six optimal control interventions to flatten the curve of the coronavirus pandemic in society. Numerical experiments of the COVID-19 model are executed in MatLab to corroborate the qualitative analysis of the model. © The Author(s), under exclusive licence to Springer Nature B.V. 2024.

关键词： 49J15 cost-effectiveness analysis COVID-19 Dynamical system LHS/PRCC Mathematical modelling Optimal control analysis Sensitivity analysis

来源：评论

学校读者我要写书评

暂无评论

Process Flow and Design Optimization of a Microbolometer 6

Process Flow and Design Optimization of a Microbolometer

引用

6th International Conference on Electrical Information and Communication Technology, EICT 2023

作者： Rana, Mukti Almaktoom, Abdulaziz T. Delaware State University Division of Physics Engineering Mathematics and Computer Sciences and Optical Science Center for Applied Research Dover United States Department of Operations and Supply Chain Management Jeddah Saudi Arabia

ISBN: (纸本)9798350370836

Microbolometers using a-Si0.15Ge0.85O0.0236 thin films were fabricated using radio frequency magnetron sputtering and lift of technique. When a 200 nm-thick and 40 × 40 μm2 Si0.15Ge0.85O0.0236 pixels on top of the electrode arm was used, it was observed that the electrode arms and the pixels were wrapped after they were subjected to the surface micromachining process. In order to fix this problem, the design and process flow of the microbolometer array were optimized to obtain mechanically stable microbolometers. We used GexSi1-xOy, silicon nitride, NiCr and silicon nitride to provide mechanical strength and stability to the microbolometer pixels. With the modified structure and process flow optimization it was found that the detectors of bridge structure were suspended on top of the substrate. We performed forming gas passivation at 250 oC for seven hours to minimize the 1/f-noise. A temperature coefficient of resistance (TCR) of 4.8%/K was obtained at 295 K. We obtained the highest detectivity and responsivity values 1 × 104 V/W and 8.3 × 106 cm-Hz1/2/W. © 2023 IEEE.

关键词： Pixels

来源：评论

学校读者我要写书评

暂无评论

Digital-Twin Enabled Time Ahead Resource Allocation for Integrated Fiber-Wireless Connected Vehicular Network

引用

Journal of Communications and Information Networks 2024年第3期9卷 296-308页

作者： Akshita Gupta Saurabh Jaiswal Martin Maier Vivek Ashok Bohara Anand Srivastava Wirocomm Research Group Department of Electronics&Communication EngineeringIndraprastha Institute of Information Technology Delhi(IIITD)New Delhi 110020India Department of Computer Science&Applied Mathematics Indraprastha Institute of Information Technology Delhi(IIITD)New Delhi 110020India Optical Zeitgeist Laboratory Institute National de la Recherche ScientifiqueMontreal H5A 1K6Canada

The digital twin(DT)is envisaged as a catalyst for pioneering ecosystems of service provision within an immersive environment born from the convergence of virtual and physical ***,DT could enhance the performance of edge-intelligent connected vehicular networks by allocating network resources efficiently based on the key performance indicators(KPIs)of vehicular data ***,this work addresses the key challenge of computation and spectrum resource allocation for vehicular *** allocate the optimal resource allocation,we subdivided the problem into:traffic classification,collective learning,and resource allocation *** order to do so,this paper concentrates on two crucial vehicular applications:brake application and lane-change *** utilize a random forest model to collectively learn vehicular data traffic in the upcoming time ***,a time-ahead resource allocation algorithm is proposed to improve the quality of service(QoS)by intelligently offloading vehicular data traffic to a DT-based integrated fiber-wireless(Fi-Wi)connected vehicular *** evaluate the performance of the resource allocation strategy in terms of resources required by the network alongside the packet loss *** was observed that there was a 44.74%increase in cost as the total computation resources increased from F=50 to 100 GHz,whereas the PLR of the network decreased by 71.43%.

关键词： connected vehicles digital twin edgeintelligence fiber-wireless machine learning resource allocation

来源：评论

学校读者我要写书评

暂无评论

The Neural Network Controller for the Dry Low Emission Combustor of Gas-Turbine Power Plants

The Neural Network Controller for the Dry Low Emission Combu...

引用

2023 International Russian Smart Industry Conference, SmartIndustryCon 2023

作者： Kuznetsova, T.A. Sukharev, A.A. Perm National Research Polytechnic University Department of Design and Technology in Electrical Engineering Perm Russia Perm National Research Polytechnic University Department of Applied Mathematics Perm Russia

ISBN: (纸本)9781665464291

The study is devoted to the development and testing of the harmful substances' emission controller for a gas turbine power plant with a capacity of 16 MW (GTP-16) based on the built-in neural network mathematical model of a dry low emission (DLE) combustor. The developed algorithms for the neural network controller of the emission of nitrogen oxides, carbon monoxide and pressure pulsations in the DLE-combustor flame tubes are implemented in MATLAB R2018b Simulink and integrated into the GTP-16 automatic control system (ACS) on the hardware/software platform PXI NI. The efficiency of the emissions controller was checked during bench tests on the GTP-16 simulator, with the DLE-combustor neural network model performing the functions of a virtual emissions sensor. The errors in the estimation of emissions and pressure pulsations that meet the accepted requirements are determined. The normal error distribution of the developed neural network model of the combustion chamber is proved. The resulting emission control quality corresponds to the desired one. The conclusion about the possibility and prospects of using neural networks for the development of an adaptive emission control system for DLE-combustors of the gas turbine power plants was made. © 2023 IEEE.

关键词： Carbon monoxide

来源：评论

学校读者我要写书评

暂无评论

Prescribing Decision Conservativeness in Two-Stage Power Markets: A Distributionally Robust End-to-End Approach 59

Prescribing Decision Conservativeness in Two-Stage Power Mar...

引用

59th Annual Conference on Information Sciences and Systems, CISS 2025

作者： Liang, Zhirui Li, Qi Liu, Anqi Dvorkin, Yury Johns Hopkins University Department of Applied Mathematics and Statistics BaltimoreMD United States Johns Hopkins University Department of Computer Science BaltimoreMD United States Johns Hopkins University Department of Electrical and Computer Engineering BaltimoreMD United States Johns Hopkins University Department of Civil and System Engineering BaltimoreMD United States

ISBN: (纸本)9798331513269

This paper presents an end-to-end framework for calibrating wind power forecast models to minimize operational costs in two-stage power markets, where the first stage involves a distributionally robust optimal power flow (DR-OPF) model. Unlike traditional methods that adjust forecast parameters and uncertainty quantification (UQ) separately, this framework jointly optimizes both the forecast model parameters and the decision conservativeness, which determines the size of the ambiguity set in the DR-OPF model. The framework aligns UQ with actual uncertainty realizations by directly optimizing downstream operational costs, a process referred to as cost-oriented calibration. The calibration is achieved using a gradient descent approach. To enable efficient differentiation, the DR-OPF problem is reformulated into a convex form, and the Envelope Theorem is leveraged to simplify gradient derivation in the two-stage setting. Additionally, the framework supports distributed implementation, effectively reducing computational overhead and enhancing efficiency. By proactively calibrating forecast parameters and prescribing optimal decision conservativeness, the framework significantly enhances cost efficiency and reliability in power system operations. Numerical experiments on an IEEE 5-bus system demonstrate the effectiveness and efficiency of the proposed approach. © 2025 IEEE.

关键词： Wind forecasting

来源：评论

学校读者我要写书评

暂无评论

Sigma-Mixed Unscented Kalman Filter-Based Fault Detection for Traction Systems in High-Speed Trains

引用

Chinese Journal of Electronics 2023年第5期32卷 982-991页

作者： CHENG Chao WANG Weijun MENG Xiangxi SHAO Haidong CHEN Hongtian Department of Computer Science and Technology Changchun University of Technology Department of Mathematics and Statistics Changchun University of Technology Institute of System Research China Industrial Control Systems Cyber Emergency Response Team Department of Mechanical and Vehicle Engineering Hunan University Department of Chemical and Materials Engineering University of Alberta

Fault detection(FD) for traction systems is one of the active topics in the railway and academia because it is the initial step for the running reliability and safety of high-speed trains. Heterogeneity of data and complexity of systems have brought new challenges to the traditional FD methods. For addressing these challenges, this paper designs an FD algorithm based on the improved unscented Kalman filter(UKF) with consideration of performance degradation. It is derived by incorporating a degradation process into the state-space *** network topology of traction systems is taken into consideration for improving the performance of state estimation. We first obtain the mixture distribution by the mixture of sigma points in UKF. Then, the Lévy process with jump points is introduced to construct the degradation model. Finally, the moving average interstate standard deviation(MAISD) is designed for detecting *** the proposed methods via a traction systems in a certain type of trains obtains satisfactory results.

关键词： Degradation Network topology Fault detection Rail transportation State-space methods Safety Kalman filters

来源：评论

学校读者我要写书评

暂无评论

On the Use of Multi-agent Reinforcement Learning in Cyber-physical and Internet of Thing Systems 12

On the Use of Multi-agent Reinforcement Learning in Cyber-ph...

引用

12th Mediterranean Conference on Embedded Computing, MECO 2023

作者： Yarahmadi, Hossein Shiri, Mohammad Ebrahim Challenger, Moharram Navidi, Hamidreza Sharifi, Arash University of Antwerp and Flanders Make Strategic Research Center Department of Computer Science Belgium Islamic Azad University Science and Research Branch Department of Computer Engineering Tehran Iran Shahed University Department of Mathematics and Computer Science Tehran Iran

ISBN: (纸本)9798350322910

In this paper, we provide a review of cyber-physical systems (CPSs) and explore the applications of Multi-Agent Systems (MAS), Multi-Agent Reinforcement Learning (MARL), and Multi-Agent Credit Assignment Problem (MCA) in CPSs. Our primary focus is on mapping specific domains, including job scheduling, energy management, and smart transport systems, to MAS and applying MARL and MCA techniques to solve the problems. To evaluate the effectiveness of our proposed method, we applied it to the job scheduling problem, using two parameters, CPU and bandwidth, and tested its performance for four different tasks: Face Detection and Window Blind Control (FDWC), Finger Touch and Gate Control (FTGC), Weather Check and Thermostat Control (WCTC), and Temperature Check and Start Fan (TCSF). The results indicate that prioritizing tasks significantly improves the performance of the proposed method. We conclude that MAS, MARL, and MCA are powerful tools for solving problems in CPSs and IoT. Mapping these problems to MAS can help overcome the challenges associated with CPSs and IoT, and improve system performance. © 2023 IEEE.

关键词： Multi agent systems

来源：评论

学校读者我要写书评

暂无评论

Towards Secure and Private Smart Contracts in Ethereum: SafeSC ChatGPT-based Tool in Action

Towards Secure and Private Smart Contracts in Ethereum: Safe...

引用

2024 IEEE Global Communications Conference, GLOBECOM 2024

作者： Elghazaly, Osama Nasser, Nidal El Ouadrhiri, Ahmed Ali, Asmaa Alfaisal University IoT Research Lab Riyadh Saudi Arabia Rockford University Department of Mathematics Computer Science and Physics RockfordIL United States Wastern University Electrical and Computer Engineering Department London Canada

ISBN: (纸本)9798350351255

Blockchain-based smart contracts, while transformative, pose privacy concerns due to Ethereum's transparency. To address this, we present Safe Smart Contracts (SafeSC), leveraging zk-SNARKs for privacy without compromising Ethereum's transparency. SafeSC's Python tool facilitates contract understanding and verification without accessing the source code. Our paper explores privacy preservation techniques, favoring Zero-Knowledge Proofs (ZKPs). SafeSC employs zk-SNARKs and Groth-16, achieving a delicate balance between transparency and privacy in smart contract development. The tool's design, covering architecture, assumptions, data flow, and zero-knowledge proof workflow, marks a step toward secure smart contract solutions. We advocate for continued exploration and refinement to enhance blockchain technologies. © 2024 IEEE.

关键词： Blockchain ChatGPT Ethereum Smart Contracts

来源：评论

学校读者我要写书评

暂无评论

Temporally consistent video colorization with deep feature propagation and self-regularization learning

引用

Computational Visual Media 2024年第2期10卷 375-395页

作者： Yihao Liu Hengyuan Zhao Kelvin CKChan Xintao Wang Chen Change Loy Yu Qiao Chao Dong Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China Department of Electrical&Computer Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798 Applied Research Center Tencent PCGShenzhenChina

Video colorization is a challenging and highly ill-posed *** recent years have witnessed remarkable progress in single image colorization,there is relatively less research effort on video colorization,and existing methods always suffer from severe flickering artifacts(temporal inconsistency)or unsatisfactory *** address this problem from a new perspective,by jointly considering colorization and temporal consistency in a unified ***,we propose a novel temporally consistent video colorization(TCVC)*** effectively propagates frame-level deep features in a bidirectional way to enhance the temporal consistency of ***,TCVC introduces a self-regularization learning(SRL)scheme to minimize the differences in predictions obtained using different time *** does not require any ground-truth color videos for training and can further improve temporal *** demonstrate that our method can not only provide visually pleasing colorized video,but also with clearly better temporal consistency than state-of-the-art methods.A video demo is provided at https://***/watch?v=c7dczMs-olE,while code is available at https://***/lyh-18/TCVC-Tem porally-Consistent-Video-Colorization.

关键词： video colorization temporal consistency feature propagation self-regularization

来源：评论

学校读者我要写书评

暂无评论

Human-computer Interaction in IoT System for Water Tank Monitoring and Controlling 18

Human-Computer Interaction in IoT System for Water Tank Moni...

引用

18th IEEE International Conference on computer Science and Information Technologies, CSIT 2023

作者： Zhukovskyy, Viktor Printz, Damon Zhukovska, Nataliia The National University of Water and Environmental Engineering Department of Computer Science and Applied Mathematics Rivne Ukraine Meadowlark Solutions LLC AlbinWY United States

ISBN: (纸本)9798350360462

Building scalable infrastructure capable of processing large amounts of data from remote IoT devices is a significant challenge in industry today. This article examines one solution to this problem through a case study of Meadowlark Solution's extensive IoT network. Meadowlark Solutions designs, produces and deploys the Tank Toad, a remote water management device for agriculture. Livestock producers need to check water storage levels and operate pumps to effectively care for livestock. The Tank Toad automates the task of data collection and remote control, reducing workload and drive time. Information flows in both directions, giving the customer real-time authority over the water supply. The system as a whole, including remote devices, endpoints, data storage, dashboard elements, information distribution and customer interaction, is described below. © 2023 IEEE.

关键词： Human computer interaction

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：