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Mathematics, Volume 9, Issue 22

November-2 2021 - 153 articles

Cover Story: The problem of multicriteria optimization of a dynamic model is solved using the methods of similarity theory and criteria importance theory. The authors propose an original model of a positional system with two hydraulic actuators, synchronously moving a heavy object with a given accuracy. In order to reduce the number of optimizing parameters, the mathematical model of the system is presented in a dimensionless form. Three dimensionless optimization criteria that characterize the accuracy, size, and quality of the dynamic positioning process are considered. It is shown that the application of the criteria importance method significantly reduces the Pareto set (the set of the best solutions). This opens up the possibility of reducing many optimal solutions to one solution, which greatly facilitates the choice of parameters when designing a mechanical object. View this paper
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Articles (153)

  • Article
  • Open Access
2 Citations
2,269 Views
9 Pages

22 November 2021

In this paper, we consider the validity of the strong maximum principle for weakly coupled, degenerate and cooperative elliptic systems in a bounded domain. In particular, we are interested in the viscosity solutions of elliptic systems with fully no...

  • Article
  • Open Access
46 Citations
4,594 Views
17 Pages

Ensemble of Deep Learning-Based Multimodal Remote Sensing Image Classification Model on Unmanned Aerial Vehicle Networks

  • Gyanendra Prasad Joshi,
  • Fayadh Alenezi,
  • Gopalakrishnan Thirumoorthy,
  • Ashit Kumar Dutta and
  • Jinsang You

22 November 2021

Recently, unmanned aerial vehicles (UAVs) have been used in several applications of environmental modeling and land use inventories. At the same time, the computer vision-based remote sensing image classification models are needed to monitor the modi...

  • Article
  • Open Access
3 Citations
2,670 Views
14 Pages

22 November 2021

In the present paper, we propose to study generalized weighted backward shifts BB over non-Archimedean c0(N) spaces; here, B=(bij) is an upper triangular matrix with supi,j|bij|<∞. We investigate the sypercyclic and hypercyclic properties of...

  • Article
  • Open Access
5 Citations
3,476 Views
13 Pages

Graph, Spectra, Control and Epidemics: An Example with a SEIR Model

  • Giacomo Aletti,
  • Alessandro Benfenati and
  • Giovanni Naldi

22 November 2021

Networks and graphs offer a suitable and powerful framework for studying the spread of infection in human and animal populations. In the case of a heterogeneous population, the social contact network has a pivotal role in the analysis of directly tra...

  • Article
  • Open Access
8 Citations
4,921 Views
27 Pages

22 November 2021

The negative impact of false information on social networks is rapidly growing. Current research on the topic focused on the detection of fake news in a particular context or event (such as elections) or using data from a short period of time. Theref...

  • Article
  • Open Access
13 Citations
3,026 Views
17 Pages

22 November 2021

In this paper, we propose an approach to inverse spectral problems for the n-th order (n≥2) ordinary differential operators with distribution coefficients. The inverse problems which consist in the reconstruction of the differential expression coe...

  • Article
  • Open Access
2 Citations
4,358 Views
21 Pages

21 November 2021

The purpose of this paper is to investigate the linear stability analysis for the laminar-turbulent transition region of the high-Reynolds-number instabilities for the boundary layer flow on a rotating disk. This investigation considers axial flow al...

  • Article
  • Open Access
4 Citations
2,449 Views
25 Pages

Observer-Based Control for Nonlinear Time-Delayed Asynchronously Switching Systems: A New LMI Approach

  • Amin Taghieh,
  • Ardashir Mohammadzadeh,
  • Jafar Tavoosi,
  • Saleh Mobayen,
  • Thaned Rojsiraphisal,
  • Jihad H. Asad and
  • Anton Zhilenkov

21 November 2021

This paper designs an observer-based controller for switched systems (SSs) with nonlinear dynamics, exogenous disturbances, parametric uncertainties, and time-delay. Based on the multiple Lyapunov–Krasovskii and average dwell time (DT) approach...

  • Review
  • Open Access
168 Citations
28,017 Views
52 Pages

Machine Learning (ML) in Medicine: Review, Applications, and Challenges

  • Amir Masoud Rahmani,
  • Efat Yousefpoor,
  • Mohammad Sadegh Yousefpoor,
  • Zahid Mehmood,
  • Amir Haider,
  • Mehdi Hosseinzadeh and
  • Rizwan Ali Naqvi

21 November 2021

Today, artificial intelligence (AI) and machine learning (ML) have dramatically advanced in various industries, especially medicine. AI describes computational programs that mimic and simulate human intelligence, for example, a person’s behavio...

  • Article
  • Open Access
12 Citations
2,216 Views
18 Pages

21 November 2021

Thermoelectric generation systems (TEGSs) are used to convert temperature difference and heat flow into DC power based on the Seebeck theorem. The basic unit of TEGS is the thermoelectric module (TEM). TEGSs have gained increasing interest in the res...

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Mathematics - ISSN 2227-7390