scholarly journals Integration of measurement and simulation of film pressure for estimating deformation of a glass sheet on a noncontact air conveyor

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Rui YANG ◽  
Wei ZHONG ◽  
Rongyue WANG ◽  
Chong LI ◽  
Jiwen FANG
Keyword(s):  
Theoretical Model ◽  
Flow Behavior ◽  
Surface Damage ◽  
Glass Sheet ◽  
Thin Glass ◽  
Film Pressure ◽  
One Dimensional ◽  
Glass Substrates ◽  
The One ◽  
Air Film

Recently, large and thin glass substrates are transported by air film conveyors to reduce surface damage. On the production line, the glass substrates are desired to be transported flatly on the conveyor to ensure the quality inspection. A method by feedbacking film pressure to the theoretical model is proposed for estimation of the deformation of the glass sheet, and the validity of the method is theoretically and experimentally verified. First, a theoretical model including the flow behavior through a porous-walled gap is established, and the film pressure distribution can be predicted by solving the model. Then, an experimental setup that can simultaneously measure the film pressure and the flatness of the glass sheet is established, and, the validity of the model is verified experimentally. Next, with the pressure points at the grooves as the boundary and the pressure points at the flange area as the feedback, an algorithm is applied to shape the one-dimensional deformation at the centerlines in accordance with a quadratic curve. Furthermore, two-dimensional deformation of the glass sheet can then be estimated by an interpolation operation. Comparisons of the calculated results with the experimental data verify the effectiveness of the estimating method.

A theoretical model describing the one-dimensional growth of single crystals on free sustained substrates

2018 ◽  
Vol 271 ◽  
pp. 76-80 ◽  
Author(s):  
Ziran Ye ◽  
Ke Wang ◽  
Chenxi Lu ◽  
Ying Jin ◽  
Chenghua Sui ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Single Crystals ◽  
One Dimensional ◽  
Dimensional Growth ◽  
The One

Theoretical Model for the One-Dimensional Temperature and Stress Calculation of Simple Hot Plate Welded Geometries

2002 ◽  
Vol 287 (11) ◽  
pp. 843-853 ◽  
Author(s):  
Helmut Potente ◽  
Joachim Schnieders ◽  
Markus Bornemann
Keyword(s):  
Theoretical Model ◽  
Hot Plate ◽  
One Dimensional ◽  
Stress Calculation ◽  
The One

THE EFFECT OF DAMAGED VEHICLES EVACUATION ON TRAFFIC FLOW BEHAVIOR

2009 ◽  
Vol 20 (12) ◽  
pp. 1989-1998 ◽  
Author(s):  
ABDELAZIZ MHIRECH ◽  
HAMID EZ-ZAHRAOUY ◽  
ASSIA ALAOUI ISMAILI
Keyword(s):  
Steady State ◽  
Traffic Flow ◽  
Flow Behavior ◽  
Initial Density ◽  
Realistic Model ◽  
Collision Probability ◽  
One Dimensional ◽  
Parallel Dynamics ◽  
The One ◽  
High Initial Density

The effect of the damaged car evacuation on the traffic flow behavior is investigated, in the one-dimensional deterministic Nagel–Schreckenberg model, using parallel dynamics. A realistic model applied to the cars involved in collisions is considered. Indeed, in this model we suppose that the damaged cars must be removed from the ring with a probability P exit . This investigation enables us to understand how the combination of the two probabilities, namely P col and P exit , acts on density and current. It is found that the current and density at the steady state, depend strongly on the initial density of cars in the ring. However, for the intermediate initial density ρi, the current J decreases when increasing either P exit and/or P col . While, for high initial density, J increases passes through a maximum and decreases for large values of P exit . Furthermore, the current can decrease or increase with the collision probability depending on the initial density.

scholarly journals Resonance Raman Spectra of Erythrocytes: Vibron Model

2018 ◽  
Vol 34 (5) ◽  
pp. 2671-2672
Author(s):  
J. Vijayasekhar
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Resonance Raman ◽  
Theoretical Method ◽  
Vibrational Modes ◽  
One Dimensional ◽  
Resonance Raman Spectra ◽  
The One

In this paper, vibrational spectra (infrared and Raman) of oxygenated and deoxynated functional erythrocytes are calculated using theoretical method “Vibron model” in the one-dimensional [U(2)] framework. The determined vibrational modes by Vibron model are compared with experimental data. It has been observed that results from the theoretical model reveal near to the exact, reliable with the experimental data.

Steady Flow in Collapsible Tubes

1977 ◽  
Vol 99 (3) ◽  
pp. 126-147 ◽  
Author(s):  
Ascher H. Shapiro
Keyword(s):  
Steady Flow ◽  
Pressure Difference ◽  
Wave Speed ◽  
Flow Behavior ◽  
External Pressure ◽  
Surface Flow ◽  
Transmural Pressure ◽  
One Dimensional ◽  
Wall Stiffness ◽  
The One

The one-dimensional theory of steady flow in a thin-walled tube, partially collapsed by a negative transmural pressure difference, is developed in a general way. The mechanics of the flow is closely coupled to the mechanics of the tube. The latter is characterized by a “tube law”: the relationship between cross-sectional area and transmural pressure difference. Features analogous to those in gas dynamics and free-surface flow may manifest themselves: a characteristic wave propagation speed; opposite phenomena at flow speeds, respectively, less than and greater than the wave speed; choking; and shocklike transitions. There are many practical examples of such flows, mainly in physiology and medicine. The one-dimensional, steady analysis includes the effects of friction, lengthwise variations in external pressure, variations in elevation, resting area, wall stiffness, and mechanical properties. The speed index S (ratio of flow speed to wave speed), analogous to the Mach and Froude numbers, appears naturally in the results as a controlling parameter of behavior. Various practical ways of passing continuously from subcritical (S < 1) to supercritical (S > 1)speed are suggested. A preliminary theory of shocklike, dissipative transitions is developed, the results of which depend sensitively on the tube law. Explicit working formulas are developed for several simple types of flow (friction alone; changes in rest area alone; changes in external pressure or elevation alone) for a simple, approximate tube law. Various modes of flow behavior for a flow affected by both friction and gravity are explored.

scholarly journals Comparison of flow resistance relations for debris flows using a one-dimensional finite element simulation model

2006 ◽  
Vol 6 (1) ◽  
pp. 155-165 ◽  
Author(s):  
D. Naef ◽  
D. Rickenmann ◽  
P. Rutschmann ◽  
B. W McArdell
Keyword(s):  
Finite Element ◽  
Debris Flows ◽  
Flow Resistance ◽  
Flow Behavior ◽  
Equations Of Motion ◽  
One Dimensional ◽  
Averaged Equations ◽  
Dimensional Finite Element ◽  
To Come ◽  
The One

Abstract. This paper describes a one-dimensional finite element code for debris flows developed to model the flow within a steep channel and the stopping conditions on the fan. The code allows the systematic comparison of a wide variety of previously proposed one-phase flow resistance laws using the same finite element solution method. The one-dimensional depth-averaged equations of motion and the numerical model are explained. The model and implementation of the flow resistance relations was validated using published analytical results for the dam break case. Reasonable agreement for the front velocities and stopping location for a debris-flow event in the Kamikamihori torrent in Japan can be achieved with turbulent flow resistance relations including "stop" terms which allow the flow to come to rest on a gently sloping surface. While it is possible to match the overall bulk flow behavior using relatively simple flow resistance relations, they must be calibrated. A sensitivity analysis showed that the shape of the upstream input hydrograph does not much affect the flow conditions in the lower part of the flow path, whereas the event volume is much more important.

Exploring the Multidimensional Facets of Authoritarianism: Authoritarian Aggression and Social Dominance Orientation

2008 ◽  
Vol 67 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Stefano Passini
Keyword(s):  
Social Dominance ◽  
Factor Model ◽  
Three Dimensional ◽  
Social Dominance Orientation ◽  
Model Fit ◽  
Regression Analyses ◽  
One Dimensional ◽  
Confirmatory Factor ◽  
The One ◽  
Better Than

The relation between authoritarianism and social dominance orientation was analyzed, with authoritarianism measured using a three-dimensional scale. The implicit multidimensional structure (authoritarian submission, conventionalism, authoritarian aggression) of Altemeyer’s (1981, 1988) conceptualization of authoritarianism is inconsistent with its one-dimensional methodological operationalization. The dimensionality of authoritarianism was investigated using confirmatory factor analysis in a sample of 713 university students. As hypothesized, the three-factor model fit the data significantly better than the one-factor model. Regression analyses revealed that only authoritarian aggression was related to social dominance orientation. That is, only intolerance of deviance was related to high social dominance, whereas submissiveness was not.

Adiabatic large polarons in anisotropic molecular crystals

2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj
Keyword(s):  
Energy Transfer ◽  
Effective Mass ◽  
Molecular Crystals ◽  
Single Chain ◽  
Proper Understanding ◽  
One Dimensional ◽  
Interchain Coupling ◽  
Large Polaron ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.

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