Experimental study of vertical slat screens effects on reducing shallow water sloshing in a tank under horizontal excitation with a wide frequency range

2019 ◽  
Vol 173 ◽  
pp. 131-141 ◽  
Author(s):  
Liting Yu ◽  
Mi-An Xue ◽  
Jinhai Zheng
Keyword(s):  
Experimental Study ◽  
Shallow Water ◽  
Wide Frequency Range ◽  
Frequency Range

scholarly journals Experimental Study of Raman Spectra of Some Aromatic Hydrocarbons

2020 ◽  
Vol 65 (4) ◽  
pp. 284
Author(s):  
B. Eshchanov ◽  
Sh. Otajonov ◽  
G. Mukhamedov ◽  
I. Doroshenko ◽  
O. Karpova ◽  
...  
Keyword(s):  
Experimental Study ◽  
Aromatic Hydrocarbons ◽  
Low Frequency ◽  
Semiempirical Method ◽  
Wide Frequency Range ◽  
Torsional Vibrations ◽  
Benzene Derivatives ◽  
Frequency Range ◽  
Frequency Spectra ◽  
Potential Barriers

The vibrational spectra of liquid aromatic hydrocarbons – bromobenzene, dioxane, toluene – are studied in a wide frequency range by means of Raman spectroscopy. The manifestation of torsional vibrations of individual groups of atoms is established from the obtained data on the low-frequency spectra. The possibility of using a semiempirical method for calculating the potential barriers of methyl and halide groups in benzene derivatives is shown.

scholarly journals Radiating Slot in the Coaxial Cable Shield: Measurement Based Characterization

2015 ◽  
Vol 11 (3) ◽  
pp. 136
Author(s):  
Antonio Šarolić ◽  
Zlatko Živković ◽  
Damir Senić ◽  
Niko Ištuk
Keyword(s):  
Experimental Study ◽  
Electric Field ◽  
Communication Systems ◽  
Wide Frequency Range ◽  
Coaxial Cable ◽  
Wireless Communication Systems ◽  
Frequency Range ◽  
Radiation Characteristics ◽  
Orthogonal Components ◽  
The Common

The paper presents the comprehensive experimental study of radiation characteristics of a single slot in a coaxial cable shield. The slot was realized in four different embodiments, which varied by slot orientation and length. Three orthogonal polarizations of radiated electric field were analyzed along the axis perpendicular to cable, broadside to the slot, in a broadband frequency range (80-1000 MHz). The analysis was based on thorough measurements of the coupling loss, which is the common parameter for the leaky cable characterization. The obtained results showed that the electric field component longitudinal to the cable axis considerably dominates over other two orthogonal components, for all four slot types. Doubling the length of the slot caused a ca. 20 dB increase of the radiated field. Different slot orientations, having the same length in the cross-section projection, yielded approximately equal field strengths. The results of this experimental study clearly and visibly demonstrate the radiating slot field dependence on polarization and slot geometry in a wide frequency range. Thus they are useful for planning of wireless communication systems based on radiating cables, as well as for understanding polarization related issues in such systems.

Installation for testing electronic voltmeters over a wide frequency range

1976 ◽  
Vol 19 (10) ◽  
pp. 1525-1526
Author(s):  
A. M. Fedorov ◽  
V. V. Krestovskii ◽  
V. S. Kiselev ◽  
S. A. Razumovskii ◽  
V. A. Shcheglov
Keyword(s):  
Wide Frequency Range ◽  
Frequency Range

Experimental Study of a Tanker Ship Squat in Shallow Water

2014 ◽  
Vol 66 (2) ◽  
Author(s):  
Mohammadreza Fathi Kazerooni ◽  
Mohammad Saeed Seif
Keyword(s):  
Experimental Study ◽  
Shallow Water ◽  
Experimental Approach ◽  
Model Tests ◽  
Ship Hull ◽  
Experimental Results ◽  
Shallow Waters ◽  
Towing Tank ◽  
Ship Model

One of the phenomena restricting the tanker navigation in shallow waters is reduction of under keel clearance in the terms of sinkage and dynamic trim that is called squatting. According to the complexity of flow around ship hull, one of the best methods to predict the ship squat is experimental approach based on model tests in the towing tank. In this study model tests for tanker ship model had been held in the towing tank and squat of the model are measured and analyzed. Based on experimental results suitable formulae for prediction of these types of ship squat in fairways are obtained.

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