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Temperature (20–100 °C) and excitation power (10–700 mW)-dependent photoluminescence (PL) measurements have been carried out on the 1.3 μm GaAs-based InAs quantum dot (QD) laser structures. Rate equation was used to interpret the PL behavior of the QD. The exciton behavior of the carriers in InAs QD has been verified. The excitonic modal gain has been calculated (under exciton picture) and compared...
In this paper a real time quality control strategy is studied for non-Gaussian chemical processes using the molecular weight distribution control of styrene polymerization process as a case study. At first the system model is derived and this is then followed by the model reduction and then the required controller design. Simulated results have been obtained to show the effectiveness of the proposed...
Chaos anti-control is considered for mechanical vibration control. The linear system under period excitation is guided to a chaotic system by a traditional control method. After the dynamic equation of the system is transferred to a dimensionless one, it was made to track Duffing system by adding a controller. The control parameters were selected according to Mélnikov criterion instead of calculation...
This paper discusses a vision problem for the detection of lift operation panel which is a plane subject to deformation due to viewing angle change. The key problem in this project is the large scale change where the panel detection has to start at a significant distance away, and end up with the camera very near to the panel button. The process has three steps: (1) hunting for the panel using a coarse...
A new two-dimensional (2-D) finite-difference method with condensed nodes is presented for guided wave structures in frequency-domain. By solving the four transverse field component eigen equations, the dispersion characteristics and mode fields are obtained. The new method is verified by two application examples, and it can get more accurate fields at boundaries or interfaces than those by conventional...
We demonstrate for the first time a pulse shape frequency transfer scheme using type II second harmonic generation (SHG). Our technique allows general control of both the intensity and phase profiles of the output waveform.
We study the rate of convergence of a coupled wave systems under two different boundary conditions, energy absorbing in two ends for one and free or fixed boundary controls in two ends for the other one. We will observe the theoretical results by numerical computations as well.
We study the linearised self-excited wave equation xtt - ?? x-P(x) xt=0, where P(x)??0, P(x) L??(??), in a bounded domain ?? ?? Rn with smooth boundary ?? where boundary damping is present. Considering the partition {??+, ??-} of the boundary ?? on which x=0 on ??, and un+ Kut + Lu= 0, on ??, we find two different bounds for P such that the energy decays exponentially in the energy space as t tends...
Equations for the loop transmission bound for the multivariable Quantitative Feedback Theory are presented nere. These equations are useful in the computer - aided design of multivariable control systems.
This paper deals with the identification of a special kind of non-linear systems, bilinear systems. A new formulation of discrete bilinear systems is developed. An improved recursive identification method for these systems is presented.
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