As analyses of system behavior and complexity through computer modeling and simulation have been growing, high performance modeling is noticed to handle behavior and complexity of modern large-scale systems. The high performance modeling focuses on high resolution representation of system and performance improvement. This paper presents a quantized system modeling as an effective high performan...

A quantized controller is a model-free controller which can provide a nonlinear control. This paper conduct a preliminary study on using the quantized controller in the Static VAR Compensators (SVC) control to enhance the damping of the power-swing. The test system used is a two area multi-machine system. A severe disturbance is introduced into the power system and the quantized controller cont...

Applying a pulse-train input to a spiking chaotic oscillator, the chaotic dynamics is quantized. The quantized system can output various pulse-trains that can be used as a rich coding source. Such quantized dynamics is analyzed rigorously using the computer. As an application, a basic multiplex communication system with pulse interval modulation is also shown.

In this paper, a new Hidden Markov Model (HMM)-based face recognition system is proposed. As a novel point despite of five-state HMM used in pervious researches, we used 7-state HMM to cover more details. Indeed we add two new face regions, eyebrows and chin, to the model. As another novel point, we used a small number of quantized Singular Values Decomposition (SVD) coefficients as feature...

This paper analyzes the quantized feedback stabilization problem for a class of linear system with nonlinear disturbance, where the system and controller are connected via a communication channel. In this case, the effect of quantization errors is studied. A practical quantized scheme is designed such that the transmission error decays to zero exponentially. Meanwhile, a sufficient condition in...

This paper presents a systematic approach to designing a naïve quantized control law that combines a regular round-to-nearest quantizer with a closed-loop dynamic system to generate a coarsely quantized control force for reference tracking. The naïve quantized control law is derived from minimizing an instantaneous absolute value of a performance-index signal. The stability and performance of t...

Starting from the Schrödinger-equation of a composite system, we derive unified dynamics of a classical harmonic system coupled to an arbitrary quantized system. The classical subsystem is described by random phase-space coordinates entangled with the quantized variables of the complementary subsystem. Our semiclassical equation is true in a sense that its predictions are identical to those of ...