Browsing Moksliniai ir apžvalginiai straipsniai / Research and Review Articles by Publisher "MDPI"

Now showing items 1-20 of 1006

    • 0.13 μm CMOS traveling-wave power amplifier with on- and off-chip gate-line termination 

      Vasjanov, Aleksandr; Barzdėnas, Vaidotas (Electronics, 2020)
      Broadband amplifiers are essential building blocks used in high data rate wireless, radar, and instrumentation systems, as well as in optical communication systems. Only a traveling-wave amplifier (TWA) provides sufficient ...

    • 2-DOF small-size piezoelectric locomotion platform with the unlimited motion range 

      Čeponis, Andrius; Mažeika, Dalius; Jūrėnas, Vytautas (Micromachines, 2021)
      This paper presents numerical and experimental investigations of a small size piezoelectric locomotion platform that provides unlimited planar motion. The platform consists of three piezoelectric bimorph plates attached ...

    • 2D CFD simulation of dynamic heat transfer in an open-type refrigerated display cabinet 

      Vengalis, Tadas; Mokšin, Vadim (Applied sciences, 2022)
      This study uses a simplified two-dimensional time-dependent computational fluid dynamic (CFD) model to study the influence of wall shelf configuration and outtake honeycomb inclination angle on the performance of the air ...

    • 3DOF ultrasonic motor with two piezoelectric rings 

      Jūrėnas, Vytautas; Kazokaitis, Gražvydas; Mažeika, Dalius (Sensors, 2020)
      A novel design of a multiple degrees of freedom (multi-DOF) piezoelectric ultrasonic motor (USM) is presented in the paper. The main idea of the motor design is to combine the magnetic sphere type rotor and two oppositely ...

    • 5G standalone and 4G multi-carrier network-in-a-box using a software defined radio framework 

      Kiela, Karolis; Jurgo, Marijan; Mačaitis, Vytautas; Navickas, Romualdas (Sensors: Special issue: Experimentation in 5G and beyond networks: State of the art and the way forward, 2021)
      In this work, an open Radio Access Network (RAN), compatible, scalable and highly flexible Software Defined Radio (SDR)-based Remote Radio Head (RRH) framework is proposed and designed. Such framework can be used to implement ...

    • A bender’s algorithm of decomposition used for the parallel machine problem of robotic cell 

      Komari Alaei, Mohammad Reza; Soysal, Mehmet; Elmi, Atabak; Banaitis, Audrius; Banaitienė, Nerija; Rostamzadeh, Reza; Javanmard, Shima (Mathematics, 2021)
      The present research addresses the single transportation robot used to alleviate problems of robotic cell scheduling of the machines. For the purpose of minimizing the make-span, a model of mixed-integer linear programming ...

    • A bi-objective model for scheduling construction projects using critical chain method and interval-valued fuzzy sets 

      Dalouchei, Fatemeh; Mousavi, Seyed Meysam; Antuchevičienė, Jurgita; Minaei, Ahmad (Buildings: Intelligent Multi-Criteria Decision-Making Methodologies in Building and Construction Management, 2022)
      Numerous constraints affect construction projects, and lack of management may lead to schedule deviation. In the execution phase of the project, due to the lack of timely access to the required resources and the existence ...

    • A bibliometric analysis of Symmetry (2009–2019) 

      Li, Bo; Xu, Zeshui; Zavadskas, Edmundas Kazimieras; Antuchevičienė, Jurgita; Turskis, Zenonas (Symmetry, 2020)
      Symmetry is an international journal in the research fields of physics, chemistry, biology, mathematics, computer science, theory and methods, and other scientific disciplines and engineering. The first paper was published ...

    • A case study on the assessment of chemical and physical pollution levels during the copying process 

      Vasiliauskienė, Vaida; Vasilis Vasiliauskas, Aidas (Sustainability: Job Design for Human and Organisational Sustainability in the Context of Emerging Technologies, 2022)
      In accordance with sustainable development goals (SDG’s), urgent action should be taken to make the societal and natural environments better for human beings. People spend most of their time indoors, therefore growing ...

    • A combined interval Type-2 Fuzzy MCDM framework for the resilient supplier selection problem 

      Hoseini, Seyed Amirali; Zolfani, Sarfaraz Hashemkhani; Skačkauskas, Paulius; Fallahpour, Alireza; Saberi, Sara (Mathematics: Multi-criteria decision making and data mining, 2022)
      Selecting the most resilient supplier is a crucial problem for organizations and managers in the supply chain. However, due to the inherited high degree of uncertainty in real-life projects, developing a decision-making ...

    • A comparison of discrete schemes for numerical solution of parabolic problems with fractional power elliptic operators 

      Čiegis, Raimondas; Čiegis, Remigijus; Dapšys, Ignas (Mathematics: Section Computational and Applied Mathematics, 2021)
      The main aim of this article is to analyze the efficiency of general solvers for parabolic problems with fractional power elliptic operators. Such discrete schemes can be used in the cases of non-constant elliptic operators, ...

    • A comparison of parallel algorithms for numerical solution of parabolic problems with fractional power elliptic operators 

      Čiegis, Raimondas; Dapšys, Ignas; Čiegis, Remigijus (Axioms, 2022)
      In this article we construct parallel solvers analyze the efficiency and accuracy of general parallel solvers for three dimensional parabolic problems with the fractional power of elliptic operators. The proposed discrete ...

    • A current spectrum-based algorithm for fault detection of electrical machines using low-power data acquisition devices 

      Asad, Bilal; Raja, Hadi Ashraf; Vainmann, Toomas; Kallaste, Ants; Pomarnacki, Raimondas; Hyunh, Van Khang (Electronics: Advanced Fault Detection, Diagnosis and Prognosis in a Context of Renewable Power Generation, 2023)
      An algorithm to improve the resolution of the frequency spectrum by detecting the number of complete cycles, removing any fractional components of the signal, signal discontinuities, and interpolating the signal for fault ...

    • A cylinder-type multimodal traveling wave piezoelectric actuator 

      Mažeika, Dalius; Čeponis, Andrius; Makutėnienė, Daiva (Applied sciences, 2020)
      Numerical and experimental investigations of a multimodal piezoelectric traveling wave actuator are presented. The actuator consists of a cylindrical stator with a conical hole and piezoceramic rings that are located at ...

    • A decision framework under a linguistic hesitant fuzzy set for solving multi-criteria group decision making problems 

      Krishankumar, Raghunathan; Ravichandran, Kattur Soundarapandi; Premaladha, Jayaraman; Kar, Samarjit; Zavadskas, Edmundas Kazimieras; Antuchevičienė, Jurgita (Sustainability, 2018)
      With fast-growing interest in sustainable healthcare management, proper selection and evaluation of hospitals become highly essential. Generally, experts/decision-makers (DMs) prefer qualitative information for rating ...

    • A deep-learning-based approach to keystroke-injection payload generation 

      Gurčinas, Vitalijus; Dautartas, Juozas; Janulevičius, Justinas; Goranin, Nikolaj; Čenys, Antanas (Electronics: Special issue: Data driven security, 2023)
      Investigation and detection of cybercrimes has been in the spotlight of cybersecurity research for as long as the topic has existed. Modern methods are required to keep up with the pace of the technology and toolset used ...

    • A disc-type high speed rotary ultrasonic motor with internal contact teeth 

      Qiu, Jianmin; Yang, Ying; Hong, Xin; Vasiljev, Piotr; Mažeika, Dalius; Borodinas, Sergejus (Applied sciences: Special issue: IWPMA (International Workshop on Piezoelectric Materials and Applications in Actuators), 2021)
      This paper presents a disc-type ultrasonic piezoelectric motor, which is designed for micro flying vehicles. It provides a high output rotation speed under low operating voltage, compared with common piezoelectric devices, ...

    • A dynamic fuzzy approach based on the EDAS method for multi-criteria subcontractor evaluation 

      Keshavarz-Ghorabaee, Mehdi; Amiri, Maghsoud; Zavadskas, Edmundas Kazimieras; Turskis, Zenonas; Antuchevičienė, Jurgita (Information, 2018)
      Selection of appropriate subcontractors for outsourcing is very important for the success of construction projects. This can improve the overall quality of projects and promote the qualification and reputation of the main ...

    • A framework for project delivery systems via hybrid fuzzy risk analysis: Application and extension in ICT 

      Bidel, Mohammad Javad; Safari, Hossein; Amoozad Mahdiraji, Hannan; Zavadskas, Edmundas Kazimieras; Antuchevičienė, Jurgita (Mathematics: Special issue: Data driven decision-making under uncertainty (D3U), 2022)
      One of the essential factors of project success is selecting the proper delivery method. This study aimed to provide a new hybrid decision-making framework to assist project stakeholders in evaluating and selecting the ...

    • A fuzzy extension of simplified best-worst method (F-SBWM) and its applications to decision-making problems 

      Amiri, Maghsoud; Hashemi-Tabatabaei, Mohammad; Keshavarz-Ghorabaee, Mehdi; Kaklauskas, Artūras; Zavadskas, Edmundas Kazimieras; Antuchevičienė, Jurgita (Symmetry: Special issue: Symmetric and asymmetric data in solution models, Part II), 2023)
      Today, most of the issues and challenges faced by managers and decision makers are complex and multifaceted. More clearly, due to the developments of technologies, emerging trends in various industries, competitive markets, ...