Pressure Broadening of the Microwave Absorption Lines of Oxygen

1973 ◽  
Vol 51 (22) ◽  
pp. 2329-2331 ◽  
Author(s):  
Y. Yamamoto ◽  
M. Cattani
Keyword(s):  
Microwave Absorption ◽  
Quadrupole Moment ◽  
Microwave Spectrum ◽  
The Self ◽  
Experimental Results ◽  
Dispersion Interactions ◽  
Pressure Broadening ◽  
Line Widths ◽  
Theoretical Results ◽  
Good Agreement

We calculate the line widths for the self-broadening of the microwave spectrum of oxygen taking into account simultaneously quadrupole–quadrupole and dispersion interactions. Our theoretical results are compared with the more recent experimental results. A good agreement is obtained between them if the oxygen quadrupole moment is taken as Q = 1.21 ± 0.05 D Å.

Spectroscopie par Source Laser. IV. Application de la Théorie d'Anderson au Calcul des Largeurs des Raies de la Transition 10°0–00°1 de N2O. Influence de l'Octupôle sur la Détermination du Moment Quadrupolaire de N2O

1973 ◽  
Vol 51 (6) ◽  
pp. 605-609 ◽  
Author(s):  
C. Boulet ◽  
N. Lacome ◽  
P. Isnard
Keyword(s):  
Quadrupole Moment ◽  
Experimental Results ◽  
Molecular Parameters ◽  
Line Widths

From the analysis of the available experimental results, a vibrational dependence of N2O line widths is shown, which can be explained, applying the Anderson–Tsao–Curnutte theory. But no dependence on ν of any of the molecular parameters can be deduced. In the last part, we have pointed out the effect on the determination of the quadrupole moment of assuming a nonvanishing octupole moment for N2O.

Surface Roughness Effects in High-Speed Hydrodynamic Journal Bearings

1997 ◽  
Vol 119 (4) ◽  
pp. 776-780 ◽  
Author(s):  
H. Hashimoto
Keyword(s):  
Surface Roughness ◽  
High Speed ◽  
Reynolds Equation ◽  
Computation Time ◽  
Experimental Results ◽  
Roughness Effects ◽  
Modified Reynolds Equation ◽  
Nonlinear Simultaneous Equations ◽  
Theoretical Results ◽  
Good Agreement

This paper describes an applicability of modified Reynolds equation considering the combined effects of turbulence and surface roughness, which was derived by Hashimoto and Wada (1989), to high-speed journal bearing analysis by comparing the theoretical results with experimental ones. In the numerical analysis of modified Reynolds equation, the nonlinear simultaneous equations for the turbulent correction coefficients are greatly simplified to save computation time with a satisfactory accuracy under the assumption that the shear flow is superior to the pressure flow in the lubricant films. The numerical results of Sommerfeld number and attitude angle are compared with the experimental results to confirm the applicability of the modified Reynolds equation in the case of two types of bearings with different relative roughness heights. Good agreement was obtained between theoretical and experimental results.

scholarly journals Theoretical and Experimental Study of Optimization of Polarization Spectroscopy for the D2 Closed Transition Line of 87Rb Atoms

2021 ◽  
Vol 11 (16) ◽  
pp. 7219
Author(s):  
Jeongyoun Jeong ◽  
Sanglok Lee ◽  
Sungi Hwang ◽  
Jaeuk Baek ◽  
Heung-Ryoul Noh ◽  
...  
Keyword(s):  
Pump Beam ◽  
Experimental Results ◽  
Transition Line ◽  
Matrix Equations ◽  
Optimal Parameters ◽  
Cell Temperature ◽  
Vapor Cell ◽  
Polarization Spectroscopy ◽  
Theoretical Results ◽  
Good Agreement

We experimentally and theoretically investigated the optimal condition of polarization spectroscopy for frequency stabilization on various pump beam intensities and vapor cell temperatures for the D2 closed transition line of 87Rb atoms. We compared the experimental results, such as the amplitude, width, and slope, of the polarization spectroscopy signal with the theoretical results obtained from the numerical calculation of temporal density matrix equations. Based on the results, we found the optimal parameters, such as the pump beam intensity and vapor cell temperature, for polarization spectroscopy. The theoretically expected optimal parameters were, qualitatively, in good agreement with the experimental results.

Instability of Elastically Suspended Tainter-Gate System Caused by Surface Waves on the Reservoir of a Dam

1977 ◽  
Vol 99 (4) ◽  
pp. 699-708 ◽  
Author(s):  
Noriaki Ishii ◽  
Kensaku Imaichi ◽  
Akio Hirose
Keyword(s):  
Surface Waves ◽  
Dynamical Behavior ◽  
The Self ◽  
Excited Oscillation ◽  
Gate System ◽  
Damping Effects ◽  
Theoretical Results ◽  
Good Agreement

In this study, it is theoretically shown that an elastically suspended Tainter-gate system with damping effects possesses the property of a self-excited oscillation, provided that the center of the curved weir plate is not in agreement with the location of the trunnion pin. Moreover, the theoretically obtained characteristics for the self-excited oscillation are confirmed with experiments, and it is shown that the theoretical results are in good agreement with experiments. It is concluded that when designing a dam system with Tainter-gates or other similar devices, more interest and attention to the dynamical behavior of Tainter-gates should be taken in order to prevent disasters such as that which occurred in Japan.

INVESTIGATION OF THE ENTROPY AND SPECIFIC HEAT CAPACITY OF GaN USING INCOMPLETE GAMMA FUNCTIONS

2008 ◽  
Vol 22 (30) ◽  
pp. 5349-5355 ◽  
Author(s):  
SAVAŞ SÖNMEZOǦLU
Keyword(s):  
Heat Capacity ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Experimental Results ◽  
Analytical Relation ◽  
Gamma Functions ◽  
Temperature Range ◽  
Incomplete Gamma Functions ◽  
Theoretical Results ◽  
Good Agreement

The aim of this paper is to provide validity and reliable analytical relation for the thermodynamic functions calculated in terms of the Debye temperature using incomplete gamma functions, and examines the entropy and specific heat capacity of hexagonal single crystals of GaN in the 0–1800 K temperature range. The obtained results have been compared with the corresponding experimental and theoretical results. Our results are in excellent agreement with the theoretical results over the entire temperature range. It has also shown that at low temperature, our results are in very good agreement with the experimental results, however, at high temperature, our results are lower than other experimental results.

scholarly journals Analysis and Experimental Study on Bearing Capacity of “All-Inclusive” Underpinning Joint

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Kefeng Yue ◽  
Lei Yan
Keyword(s):  
Bearing Capacity ◽  
Experimental Results ◽  
Calculation Formula ◽  
Connection Method ◽  
New Type ◽  
Punching Failure ◽  
Simplified Calculation ◽  
Theoretical Results ◽  
Concrete Interface ◽  
Good Agreement

Aiming at the phenomenon of punching failure and large slip at the new-to-old concrete interface of “beam-column” underpinning joint, a new type of “all-inclusive” underpinning joint is tested and numerically analyzed, which adopts the spraying glue + grooving + planting bars + prestressed + hooping connection method. The experimental and numerical analysis results show that the connection method of “all-inclusive” underpinning joint can effectively avoid punching failure of the joint, and the failure mode is mainly flexure-shear. Then, the “all-inclusive” underpinning joint can delay the initial slip at the new-to-old concrete interface and reduce the overall slip. Finally, combining the theoretical and experimental results, a simplified calculation formula for the bearing capacity of the “all-inclusive” underpinning joint is improved. The theoretical results are in good agreement with the experimental results, which indicates that the calculation of the bearing capacity of the underpinning joint using the formula in this paper is feasible and can provide experimental and theoretical references for similar projects.

Formation of Steady Dimples in Point TEHL Contacts

2000 ◽  
Vol 123 (1) ◽  
pp. 42-49 ◽  
Author(s):  
P. Yang ◽  
S. Qu ◽  
M. Kaneta ◽  
H. Nishikawa
Keyword(s):  
Complete Solution ◽  
Elastohydrodynamic Lubrication ◽  
Experimental Results ◽  
Major Radius ◽  
Theoretical Results ◽  
Good Agreement ◽  
Contact Ellipse

Experimental results of steady dimples measured in elliptical glass-steel contact under pure sliding conditions are presented. It is found that two dimples connected with a shallower furrow are generated, each near an end of the major radius of the contact ellipse. The complete solution of the corresponding thermal elastohydrodynamic lubrication (TEHL) problem is calculated numerically. Good agreement is obtained between the experimental and theoretical results. This agreement can be explained by the temperature-viscosity wedge mechanism. Correctness of this mechanism is demonstrated using additional experiments with ceramic balls in contact with glass and sapphire disks.

scholarly journals Crystal - Rotator-I - Rotator-II Phase Transitions in the Mixtures of Alkanes

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Prabir Kumar Mukherjee
Keyword(s):  
Phase Transitions ◽  
Binary Mixture ◽  
Landau Theory ◽  
Order Parameters ◽  
Experimental Results ◽  
Transition Temperatures ◽  
First Order ◽  
Isotropic Mixing ◽  
Theoretical Results ◽  
Good Agreement

Using the combination of Flory–Huggins theory of isotropic mixing and Landau theory, we discuss the crystal – rotator-I – rotator-II phase transitions in the binary mixture of alkanes. The influence of concentration on the order parameters and the transition temperatures is discussed. Theoretical results show the first order character of both the rotator-I to crystal and rotator-II to rotator-I phase transitions in the mixture of alkanes. A good agreement between theoretical and experimental results are presented in this paper.

Computing and Analyzing the Sensitivity of Radial-Basis Function Neural Network

2013 ◽  
Vol 321-324 ◽  
pp. 1957-1961
Author(s):  
Jie Li ◽  
Jun Li ◽  
Ying Liu
Keyword(s):  
Neural Network ◽  
Radial Basis Function ◽  
Uniform Distribution ◽  
Basis Function ◽  
Experimental Results ◽  
Radial Basis ◽  
The Relationship ◽  
Theoretical Results ◽  
Input Error ◽  
Good Agreement

This paper proposes an algorithm to compute the sensitivity of the Radial-Basis Function Neural Network (RBFNN) due to the errors of the inputs and others parameters of the net works. For simplicity and practicality, all inputs and weights are assumed to be independent and identically distributed (i.i.d) with uniform distribution. A number of simulations are conducted and the good agreement between the experimental results and the theoretical results verifies the reliability and feasibility of the proposed algorithm. The relationship between the sensitivity of RBFNN and input error and the perturbation of others parameters is given.

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