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On Connectivity of Wireless Sensor Networks with Directional Antennas

ABSTRACT

In this paper, we investigate the network connectivity of wireless sensor networks with directional antennas. In particular, we establish a general framework to analyze the network connectivity while considering various antenna models and the Continue reading

“Auto-Tuned” Stereo

ABSTRACT

The purpose of this project was to determine the capability of introducing delay and gain to audio signals to synthesize a “tuned” experience. The project uses audio operational amplifiers, field effect transistors, a class D amplifier, microphones, speakers, Continue reading

Face and Lip Tracking in Unconstrained Imagery for Improved Automatic Speech Recognition

ABSTRACT

When combined with acoustical speech information, visual speech information (lip movement) significantly improves Automatic Speech Recognition (ASR) in acoustically noisy environments. Previous research has demonstrated that visual modality is a Continue reading

Control Strategy for a Grid-Connected Inverter under Unbalanced Network Conditions—A Disturbance Observer-based Decoupled Current Approach

ABSTRACT

This paper proposes a new approach on the novel current control strategy for grid-tied voltage-source inverters (VSIs) with circumstances of asymmetrical voltage conditions. A standard grid-connected inverter (GCI) allows the degree of freedom to integrate Continue reading

DDC Control Techniques for Three-Phase BLDC Motor Position Control

ABSTRACT

In this article, a novel hybrid control scheme is proposed for controlling the position of a three-phase brushless direct current (BLDC) motor. The hybrid controller consists of discrete time sliding mode control (SMC) with model free adaptive control (MFAC) Continue reading

A Comparative Reliability Study of Three Fundamental Multilevel Inverters using Two Different Approaches

ABSTRACT

The reliability of power electronic devices and components is very important to manufacturers. In recent years, many researchers have conducted reliability assessments of power electronic devices, yet the reliability of numerous Continue reading

DC-Link Capacitor Voltage Regulation for Three-Phase Three-Level Inverter-based Shunt Active Power Filter with Inverted Error Deviation Control

ABSTRACT

A new control technique known as inverted error deviation (IED) control is incorporated into the main DC-link capacitor voltage regulation algorithm of a three-level neutral-point diode clamped (NPC) inverter-based shunt active power filter (SAPF) to Continue reading

Traction Power System Capacity Limitations at Various Traffic Levels

The aim, and main contribution, of this paper is to propose a fine-tuned fast approximator, based on neural networks, that uses aggregated traction system information as inputs and outputs. This approximator can be used as an Continue reading

Real-Time Simulation of Passage-of-Time Encoding in Cerebellum Using a Scalable FPGA-Based System

The cerebellum plays a critical role for sensorimotor control and learning. However, dysmetria or delays in movements’ onsets consequent to damages in cerebellum cannot be Continue reading