scholarly journals Acoustic dissipation in wooden pipes of different species used in wind instrument making: An experimental study

2017 ◽  
Vol 141 (4) ◽  
pp. 2840-2848 ◽  
Author(s):  
Henri Boutin ◽  
Sandie Le Conte ◽  
Stéphane Vaiedelich ◽  
Benoit Fabre ◽  
Jean-Loïc Le Carrou
Keyword(s):  
Experimental Study ◽  
Instrument Making ◽  
Wind Instrument ◽  
Acoustic Dissipation

Experimental study of the error in the height of the contour of box-shaped parts, obtained by drawing from welded blanks of different thickness

2020 ◽  
pp. 49-54
Author(s):  
A. N. Malyshev ◽  
◽  
S. A. Bysov ◽  
A. G. Orlik ◽  
Yu. V. Bessmertnaya ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Strength ◽  
Machine Building ◽  
Geometric Parameters ◽  
Instrument Making ◽  
Shaping Process ◽  
Sheet Stamping ◽  
Production Technologies ◽  
Time Required ◽  
Different Thickness

The development of sheet-stamping production within the framework of meeting the needs of modern mechanical engineering involves the use of advanced technologies, materials and blanks, which makes certain requirements for the level of blank production technologies in general. In modern conditions, sheet-stamping production involves the manufacture of stamped parts in limited quantities due to their constantly changing design, which, in turn, requires optimization of the volume of investments and reduction of the time required for the implementation of technological preparation of production, flexibility of technological and design solutions, as well as the maximum approximation of all parameters of stamped parts to parameters of the finished product in order to reduce subsequent processing. Box-shaped sheet metal stamped parts obtained during the implementation of the drawing operation are actively used in the medical, light, watchmaking, food machine-building, electrical, instrument-making, and automotive industries. One of the main tasks for obtaining high-quality box-shaped sheet-stamped parts is the creation of a stamping technology that meets modern production requirements based on progressive methods for calculating shaping operations, as well as designing the contour of the original blank taking into account the peculiarities of the shaping process and the required geometric parameters of parts. Depending on the purpose of the box-shaped sheet-stamped part, the main geometric parameters are determined, the correspondence of the actual values of which to the required ones allows to make a conclusion regarding the quality of the obtained stamped product. As a rule, such a parameter is the height of the box-shaped part, the error of which ultimately should not exceed the tolerance assigned by the designer. For example, in the automotive industry, one of the promising directions for reducing the weight of a car while maintaining the strength parameters of its units and elements, as well as reducing their cost, is the introduction of sheet welded blanks of different thickness. This article is devoted to an experimental study of the error in the height of the contour of tall boxes with relatively large radii of corner curvatures, obtained by drawing from these blanks made of high-strength steel. This work was carried out within the framework of the grant NSh-2601.2020.8.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study

Experimental study of total body washout employing extracorporeal circulation and hypothermia

1974 ◽  
Vol 126 (2) ◽  
pp. 243-248
Author(s):  
A WAKABAYASHI ◽  
T KUBO ◽  
K CHARNEY ◽  
Y NAKAMURA ◽  
J CONNOLLY
Keyword(s):  
Experimental Study ◽  
Extracorporeal Circulation ◽  
Total Body

Gastric Freezing: An Experimental Study

1963 ◽  
Vol 45 (3) ◽  
pp. 374-383 ◽  
Author(s):  
Donald C. McIlrath ◽  
George A. Hallenbeck ◽  
Hubert A. Allen ◽  
Charles V. Mann ◽  
Edward J. Baldes ◽  
...  
Keyword(s):  
Experimental Study

The Effect of Cortisone and Corticotropin on The Healing of Gastric Ulcer: An Experimental Study

1958 ◽  
Vol 34 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Henry D. Janowitz ◽  
Vernon A. Weinstein ◽  
Rhoda G. Shaer ◽  
James F. Cereghini ◽  
Franklin Hollander
Keyword(s):  
Experimental Study ◽  
Gastric Ulcer
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