Results 11 to 20 of about 645,324 (291)

MATHEMATICAL MODELING OF HEAT EXCHANGE IN DIRECT FLAT CHANNELS AND DIRECT ROUND PIPES WITH ROUGH WALLS UNDER THE SYMMETRIC HEAT SUPPLY

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2017
Objectives. The aim of present work was to carry out mathematical modelling of heat transfer with symmetrical heating in flat channels and round pipes with rough walls.Methods. The calculation was carried out using the L'Hôpital-Bernoulli's method.
I E. Lobanov
doaj   +1 more source

MODELING OF HEAT EXCHANGE AT TURBULENT FLOW IN FLAT CHANNELS WITH SYMMETRIC TURBULIZERS ON BOTH PARTIES

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2019
Objectives. Mathematical modeling of heat transfer in flat channels with turbulators symmetrically located on both its sides, depending on the cross section of the turbulators.Methods.
I. E. Lobanov
doaj   +1 more source

REGULARITIES OF THE AVERAGE HEAT EXCHANGE FOR PIPES WITH ROUGH WALLS AND ROUGH FLAT CHANNELS UNDER ONE-SIDED THERMAL LOADING

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2018
. Objectives The aim of the present work is to carry out mathematical modelling of heat exchange in rough flat channels and round pipes with rough walls during one-sided heating.
Igor' E. Lobanov
doaj   +1 more source

THE SIMULATION OF ONE-DIMENSIONAL SHALLOW WATER WAVE EQUATION WITH MACCORMACK SCHEMES

open access: yesBarekeng, 2022
Many practical problems can be modeled using the one-dimensional shallow water wave equation. Therefore, the solution to the one-dimensional shallow water wave equation will be discussed to solve this problem.
Iffah Nurlathifah Fikri, Sumardi Sumardi
doaj   +1 more source

PLANNING TO PLEASE CUSTOMERS [PDF]

open access: yes, 2001
- The achievable rate of a coherent coded modulation (CM) digital communication system with data-aided channel estimation and a discrete, equiprobable symbol alphabet is derived under the assumption that the system operates on a flat fading MIMO channel ...
Gunnar Fock   +2 more
core   +2 more sources

MATHEMATICAL LOW-REYNOLDS MODELING OF HEAT EXCHANGE IIN TURBULENT FLOW IN FLAT CHANNELS WITH TURBULATORS SYMMETRICALLY LOCATED ON BOTH SIDES

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2018
Objectives The aim of the study was to simulate the heat transfer in flat channel with turbulators, symmetrically located on its both sides, depending on the channel's geometric parameters and the coolant flow modes followed by the verification of the ...
I. E. Lobanov
doaj   +1 more source

On flat lossy channel machines

open access: yesCoRR, 2020
We show that reachability, repeated reachability, nontermination and unboundedness are NP-complete for Lossy Channel Machines that are flat, i.e., with no nested cycles in the control graph. The upper complexity bound relies on a fine analysis of iterations of lossy channel actions and uses compressed word techniques for efficiently reasoning with ...
openaire   +4 more sources

CHANNEL ESTIMATION AND DETECTION FOR OFDM MASSIVE-MIMO IN FLAT AND FREQUENCY-SELECTIVE FADING CHANNELS

open access: yesJordanian Journal of Computers and Information Technology, 2020
In this paper, the least-squares channel estimation (LSCE) is investigated for Massive-Multiple-Input Multiple-Output (Ma-MIMO) OFDM systems based on pilot tones.
Abdelhamid Riadi   +2 more
doaj   +1 more source

Transport through quasi-ballistic quantum wires: the role of contacts [PDF]

open access: yes, 2000
We model one-dimensional transport through each open channel of a quantum wire by a Luttinger liquid with three different interaction parameters for the leads, the contact regions and the wire, and with two barriers at the contacts.
A. Furusaki   +23 more
core   +2 more sources

Nearest Neighbor Decoding and Pilot-Aided Channel Estimation for Fading Channels

open access: yesEntropy, 2020
We study the information rates of noncoherent, stationary, Gaussian, and multiple-input multiple-output (MIMO) flat-fading channels that are achievable with nearest neighbor decoding and pilot-aided channel estimation.
A. Taufiq Asyhari   +2 more
doaj   +1 more source

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