this paper presents a solution of non-linear viscoelastic bar systems transversal vibrations
problems in presence of biological factor. Governing differential equations were built, then
analytical expressions of the solution of this equations were found, which describe
transversal vibrations of a thin finite length bar
In this research, we have done Theoretical study, how to use
perturbation theory in order to obtain approximate solutions of the
time dependent Schrödinger equation.
We also considered application of time dependent perturbation theory to case where the
atomic quantum system interacts with electromagnetic radiation.
In this paper, the development of the drive system of the motor Wire port Crane
according to the principle of the indirect field orientation.
Require the operation of the port Crane operations, different operation situations of
variable speed and
Torque with time, which is a case dynamic electro and electro-magnetic
transient, may affect the performance of operations, so therefore been building motor Wire
port Crane operations system corps in winches achieve:
- High performance and Efficiency.
- Build the desired control system according to the principle of the Pulse Width
Modulation (PWM) and the main power system, taking into account the reduction of
changes DC-Link voltage and achieve maximum flux before starting the motor.
- Reduction of excess Voltage that may appear on a DC-Link, using the brake
Transistor with Brake resisters.
At the end of the research has been reviewed and the search results that indicate the
outstanding performance of the proposed system with the ability to use the same system to
run automated processes different.
The goal of the presented research in this paper is finding a unified way to solve cross vibration problems in nonlinear elastic fields with a biological factor. We obtained the equations of cross vibration for elastic systems by using known mathemat
ical models, and then we solved the nonlinear cross harmonic vibration problem for a finite length of effective bar.
In this paper, an optical setup to produce harmonic hyper-Rayleigh light
scattering (HRS) from organic molecules in solution has been built up. In
principle, HRS measures contribution coefficients of dipole and octupole parts.
The nonlinear suscep
tibility of the second order of six organic molecules in
solution from different chemical components such as Pyridinium, Quinolinium
groups and organic Borone complexes has been determined. The nonlinear
susceptibility measurements help to discover and select the most efficient
molecules which can be used later as polymer matrices.
Photonic crystals is a low-loss periodic medium with periodic changes of
refractive index, which is used to control the light.
Theoretically, Photonic crystals can be studied using Maxwell equations, but
it’s difficult to find a general analytical
solution for these equations, since we
are dealing with vectors. So we resort to the numerical solutions for Maxwell’s
equations to calculate the reflection and transmission coefficients and the
Photonic band gap.
