scholarly journals Theoretical Analysis of Stability of Axially Symmetric Rotating Objects with Regard to Orienting Apples

2008 ◽  
Vol 51 (4) ◽  
pp. 1353-1364 ◽  
Author(s):  
P. Narayanan ◽  
A. M. Lefcourt ◽  
U. Tasch ◽  
R. Rostamian ◽  
A. Grinblat ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Axially Symmetric ◽  
Analysis Of Stability ◽  
Rotating Objects

Theoretical Analysis and Research of Large Diameter Silos

2011 ◽  
Vol 99-100 ◽  
pp. 1203-1208 ◽  
Author(s):  
Rui Ting Ma ◽  
Yun Fang Meng
Keyword(s):  
Reinforced Concrete ◽  
Theoretical Analysis ◽  
Large Diameter ◽  
Axially Symmetric ◽  
Actual Working ◽  
Calculation Results ◽  
Internal Forces ◽  
Differential Element ◽  
Working Status ◽  
Symmetric Load

In this paper, through analyzing the differential element of silos wall suffering from axially symmetric load according to their actual working status, the author applies the theory of taking account of moment to getting silos internal forces and displacements ,and gives the differences in the calculation results gotten respectively using nonmoment theory and the theory of taking account of moment through an example. What to be thought, during the course of designing to code for design of reinforced concrete silos, is brought.

scholarly journals A New Numerical Approach for Solving 1D Fractional Diffusion-Wave Equation

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Mostafa M. A. Khater ◽  
Umair Ali ◽  
Muhammad Asim Khan ◽  
A. A. Mousa ◽  
Raghda A. M. Attia
Keyword(s):  
Wave Equation ◽  
Theoretical Analysis ◽  
Numerical Approach ◽  
Fractional Diffusion ◽  
Diffusion Wave ◽  
Numerical Examples ◽  
Physical Systems ◽  
Analysis Of Stability ◽  
Physical Phenomena ◽  
Earthquake Vibration

Fractional derivative is nonlocal, which is more suitable to simulate physical phenomena and provides more accurate models of physical systems such as earthquake vibration and polymers. The present study suggested a new numerical approach for the fractional diffusion-wave equation (FDWE). The fractional-order derivative is in the Riemann-Liouville (R-L) sense. Discussed the theoretical analysis of stability, consistency, and convergence. The numerical examples demonstrate that the method is more workable and excellently holds the theoretical analysis, showing the scheme’s feasibility.

Theoretical analysis of short backfire antenna by using Moment of method

2021 ◽  
Vol 13 (01) ◽  
pp. 24-32
Author(s):  
Ali K Al-zuwaini ◽  
◽  
Zeki A. Ahmed ◽  
Wa'i A. Godaymi ◽  
◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Mathematical Analysis ◽  
Moment Method ◽  
Theoretical Study ◽  
The Other ◽  
Axially Symmetric ◽  
Radiation Fields ◽  
Best Value ◽  
Back Reflector ◽  
The Moment

The short backfire antenna is one of the important types of antennas due to its high directional and other characteristics. Therefore, this research deals with, a theoretical study to calculate the radiative structures of a short backfire antenna as an axially symmetric body using the moment method. The main goal is to theoretically calculate the radiation fields and compare them with previous practical researches. Where the mathematical analysis with the used software was verified by comparing the results and noting the extent of the match. The other goal is to study the effect of the antenna dimensions on its performance by studying the effect of adding a rim to the edge of the large back reflector, as well as studying the change of the radius of the two reflectors (large and small), where it was confirmed that the best value for the radius of the large reflectors and small (Rm=1λ) (Rs= 0.25 λ) respectively.

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