Assessment of the stability of the turbidity spectrum method to the effect of the dispersion of the particulate substance and the medium

1979 ◽  
Vol 31 (1) ◽  
pp. 893-896
Author(s):  
K. Ramazanov ◽  
S. Yu. Shchegolev

Author(s):  
Shweta S. Bhade

While analyzing a multistorey building frame, conventionally all the probable loads are applied after modeling the entire building frame. But in practice the frame is constructed in various stages. Accordingly, the stability of frame varies at every construction stage. Even during construction freshly placed concrete floor is supported by previously cast floor by formwork. Thus, the loads assumed in conventional analysis will vary in transient situation. Obviously, results obtained by the traditional analysis will be unsuitable. Therefore, the frame should be analyzed at every construction stage taking into account variation in loads. The phenomenon known as Construction Sequence Analysis considers these uncertainties precisely. Therefore, the building structure should be analysed at every stage of construction taking into account the load variations. In this project two cases have been considered. Whereas in Case 1 the multistoried building (G+22 storied) with floating columns and transfer girder will be analysed by response spectrum method and considering P-delta effect as a whole for the subjected loading and in Case 2 the multistoried building (G+22storied) with floating columns and transfer girder will be analysed by response spectrum method with reference to the construction sequence or staged construction and considering P-delta effect. In the present study a G+22 storey multistoried R.C.C building model is modelled using Etabs 2019 software. Response spectrum analysis is made by considering building situated in zone III.Building models are analyzed by Etabs 2019 software to study the effect of maximum positive moment, maximum negative moment, maximum shear forces, maximum deflection, maximum torsion moment of transfer girder beam and total axial load under transfer girder and floating column etc



1989 ◽  
Vol 21 (2) ◽  
pp. 171-173
Author(s):  
É. Z. Kipershlak ◽  
N. T. Butkova ◽  
G. E. Prozorova ◽  
N. Yu. Dolgopolova ◽  
Yu. Ya. Malyugin


Author(s):  
Ma Yunfei ◽  
Liu Xiaohua ◽  
Dakun Sun ◽  
Sun Xiaofeng

This paper is concerned with the prediction of stability inception of centrifugal compressor based on eigenvalue theory. A body force model has been developed to simulate the impellers of the compressor by applying the effect of the blade force on momentum change and energy loss and geometries of blades. Using spectrum method, the stability equations can be precisely transformed into a very large matrix equation due to the compressor configuration. Before computing with spectrum method, it is available to use Jacobi Transform when making a transformation between physical and computational regions. Afterwards, the Singular Value Decomposition is adopted to solve the resultant eigenvalue matrix, the roots of which can conveniently predict whether the flow is stable or not. It is found that the relative error of the computational model is smaller in comparison with CFD steady results, which indicates that the model can be used as a practical and reliable theoretical criterion during the compressor design phase without requiring any experiential formulas and data.



1987 ◽  
Vol 18 (4) ◽  
pp. 257-259
Author(s):  
V. N. Smirnova ◽  
T. A. Rozhdestvenskaya ◽  
L. Ya. Tikanova ◽  
V. G. Naumov




1981 ◽  
Vol 91 (4) ◽  
pp. 553-555 ◽  
Author(s):  
A. G. Bezrukova ◽  
O. A. Rozenberg


1982 ◽  
Vol 99 ◽  
pp. 605-613
Author(s):  
P. S. Conti

Conti: One of the main conclusions of the Wolf-Rayet symposium in Buenos Aires was that Wolf-Rayet stars are evolutionary products of massive objects. Some questions:–Do hot helium-rich stars, that are not Wolf-Rayet stars, exist?–What about the stability of helium rich stars of large mass? We know a helium rich star of ∼40 MO. Has the stability something to do with the wind?–Ring nebulae and bubbles : this seems to be a much more common phenomenon than we thought of some years age.–What is the origin of the subtypes? This is important to find a possible matching of scenarios to subtypes.



1999 ◽  
Vol 173 ◽  
pp. 309-314 ◽  
Author(s):  
T. Fukushima

AbstractBy using the stability condition and general formulas developed by Fukushima (1998 = Paper I) we discovered that, just as in the case of the explicit symmetric multistep methods (Quinlan and Tremaine, 1990), when integrating orbital motions of celestial bodies, the implicit symmetric multistep methods used in the predictor-corrector manner lead to integration errors in position which grow linearly with the integration time if the stepsizes adopted are sufficiently small and if the number of corrections is sufficiently large, say two or three. We confirmed also that the symmetric methods (explicit or implicit) would produce the stepsize-dependent instabilities/resonances, which was discovered by A. Toomre in 1991 and confirmed by G.D. Quinlan for some high order explicit methods. Although the implicit methods require twice or more computational time for the same stepsize than the explicit symmetric ones do, they seem to be preferable since they reduce these undesirable features significantly.



Author(s):  
Godfrey C. Hoskins ◽  
V. Williams ◽  
V. Allison

The method demonstrated is an adaptation of a proven procedure for accurately determining the magnification of light photomicrographs. Because of the stability of modern electrical lenses, the method is shown to be directly applicable for providing precise reproducibility of magnification in various models of electron microscopes.A readily recognizable area of a carbon replica of a crossed-line diffraction grating is used as a standard. The same area of the standard was photographed in Phillips EM 200, Hitachi HU-11B2, and RCA EMU 3F electron microscopes at taps representative of the range of magnification of each. Negatives from one microscope were selected as guides and printed at convenient magnifications; then negatives from each of the other microscopes were projected to register with these prints. By deferring measurement to the print rather than comparing negatives, correspondence of magnification of the specimen in the three microscopes could be brought to within 2%.



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