Results 1 to 10 of about 15,485 (117)

Search Engine Optimization [PDF]

open access: yesFuture Internet, 2018
In this article, we will discuss at length the subject of Search Engine Optimization (SEO), its different characteristics and why basic SEO knowledge is considered as a useful tool for any web business. The article will address both the theoretical and practical issues related to the design and implementation of SEO and also will cover previous ...
Andreas A. Veglis, Dimitrios Giomelakis
openaire   +2 more sources

High-efficacy global optimization of antenna structures by means of simplex-based predictors

open access: yesScientific Reports, 2023
Design of modern antenna systems has become highly dependent on computational tools, especially full-wave electromagnetic (EM) simulation models. EM analysis is capable of yielding accurate representation of antenna characteristics at the expense of ...
Slawomir Koziel   +1 more
doaj   +1 more source

Optimizing the Classical Heat Engine [PDF]

open access: yesPhysical Review Letters, 2000
A pair of systems at different temperatures is a classic environment for a heat engine, which produces work during the relaxation to a common equilibrium. It is generally believed that a direct interaction between the two systems will always decrease the amount of the obtainable work, due to inevitable dissipation.
Allahverdyan, A. E.   +1 more
openaire   +5 more sources

Rapid and reliable re-design of miniaturized microwave passives by means of concurrent parameter scaling and intermittent local tuning

open access: yesScientific Reports, 2023
Re-design of microwave passive components for the assumed operating frequencies or substrate parameters is an important yet a tedious process. It requires simultaneous tuning of relevant circuit variables, often over broad ranges thereof, to ensure ...
Slawomir Koziel   +1 more
doaj   +1 more source

Explicit Size-Reduction of Circularly Polarized Antennas Through Constrained Optimization With Penalty Factor Adjustment

open access: yesIEEE Access, 2021
Modern communication systems of high data capacity incorporate circular polarization (CP) as the preferred antenna radiation field configuration. In many applications, integration of the system circuitry with antennas imposes size limitations on CP ...
Marzieh Mahrokh, Slawomir Koziel
doaj   +1 more source

Computationally-efficient statistical design and yield optimization of resonator-based notch filters using feature-based surrogates

open access: yesScientific Reports, 2023
Modern microwave devices are designed to fulfill stringent requirements pertaining to electrical performance, which requires, among others, a meticulous tuning of their geometry parameters.
Slawomir Koziel, Tanveerul Haq
doaj   +1 more source

Secure Communication for Uplink Cellular Networks Assisted with Full-Duplex Device-to-Device User

open access: yesFuture Internet, 2020
In this paper, the secure communication based on the full-duplex (FD) device-to-device (D2D) in cellular networks is proposed. For the proposed scheme, the novel model is established, in which a D2D user is played as a relay operating in FD mode to ...
Xin Song, Lin Xia, Siyang Xu, Yue Wang
doaj   +1 more source

Low-cost quasi-global optimization of expensive electromagnetic simulation models by inverse surrogates and response features

open access: yesScientific Reports, 2022
Conceptual design of contemporary high-frequency structures is typically followed by a careful tuning of their parameters, predominantly the geometry ones. The process aims at improving the relevant performance figures, and may be quite expensive.
Slawomir Koziel   +1 more
doaj   +1 more source

Design optimization of baffle in heat exchanger for improving flow maldistribution and pressure drop

open access: yesNihon Kikai Gakkai ronbunshu, 2022
Heat exchangers (HEs) are used in process industries such as power plants and petroleum refineries. It is important to minimize flow maldistribution as well as pressure drop for high performance of HE. A baffle is often installed in the header part of HE
Kohei MIYAMOTO   +4 more
doaj   +1 more source

Suppressing Side-Lobes of Linear Phased Array of Micro-Strip Antennas with Simulation-Based Optimization

open access: yesMetrology and Measurement Systems, 2016
A simulation-based optimization approach to design of phase excitation tapers for linear phased antenna arrays is presented. The design optimization process is accelerated by means of Surrogate-Based Optimization (SBO); it uses a coarse-mesh surrogate of
Kozieł Sławomir   +2 more
doaj   +1 more source

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