Numerical investigation of zeros of some dispersion relations appearing in sound attenuation problems in a circular lined duct [PDF]
In this paper the zeros of some dispersion relations apperaring in sound attenuation problems in circular lined ducts, carrying a gas flow, are investigated numerically.
Loredana TANASIE, Agneta M. BALINT
doaj +1 more source
INCREASE OF INDEXES OF CAR ENGINE OPERATION AT EXPENSE OF FOUR-VALVE CYLINDER HEAD APPLICATION [PDF]
The results of research of car engine operation index at transition from two-valve to fourvalve cylinder head of MeMЗ-307 car engine are presented.
F. Abramchuk, S. Kots, A. Merzlyakov
doaj
Hybrid Electric Aircraft Propulsion Case Study for Skydiving Mission
This paper describes a case study for applying innovative architectures related to electrified propulsion for aircraft. Electric and hybrid electric propulsion for aircraft has gained widespread and significant attention over the past decade.
Richard Glassock+3 more
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Study of natural and forced heat transfer coefficients on a vertical heated plate [PDF]
Infrared thermography measurement technique is a methodology which detects infrared energy emitted from an object, converts it to temperature, and displays images of temperature distribution.
Stefan-Mugur SIMIONESCU, Corneliu BALAN
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INCREASING THE EDUCATIONAL BUILDING ELECTRIC SUPPLY EFFECTIVENESS WITH THE USE OF SOLAR BATTERIES [PDF]
The average annual potential of solar energy in Ukraine, in particular, in the Kharkov region, is analyzed. A scheme is chosen for autonomous power supply to illuminate a particular room. Calculations for the introduction of LED lighting are carried out.
T. Gavrilova, D. Kasyanenko
doaj
High Fidelity Multi-Objective Design Optimization of a Downscaled Cusped Field Thruster
The Cusped Field Thruster (CFT) concept has demonstrated significantly improved performance over the Hall Effect Thruster and the Gridded Ion Thruster; however, little is understood about the complexities of the interactions and interdependencies of the ...
Thomas Fahey+2 more
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A novel hovering type of fixed wing aircraft with stealth capability [PDF]
The tactical need for fixed wing aircraft with hovering capably has long been recognized bythe military for two reasons: increased safety when landing on aircraft carriers and higher velocitiesthat the ones obtainable with rotary wing aircraft.Thus far ...
Valeriu DRĂGAN
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Triangle singularities in B¯0→χc1K−π+ relevant to Z1(4050) and Z2(4250) [PDF]
Z1(4050) and Z2(4250) observed in B¯0→χc1K-π+ by the Belle Collaboration are candidates of charged charmoniumlike states that minimally include two quarks and two antiquarks.
Satoshi X. Nakamura
semanticscholar +1 more source
CHANGE OF EFFECTIVE ENERGY INDEXES OF PNEUMATIC ENGINE OPERATION ASSERDING TO SPEED CHARACTERISTICS [PDF]
The effective indexes of the working process of the pnevmatic engine with an air-distributor valve obtained according to the results of experimental research are presented.
A. Voronkov
doaj
EVALUTION OF THE SINGLE INTERCITY FREIGHT TRANSPORTATION WAITING TIME [PDF]
The example of vechicle operation on the pendulum intercity route during single freightages processing is considered. Two approaches to the definition of the single freightage waiting time by the carrier are proposed.
N. Ponomariova+2 more
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