We study the problem of distributed and rateadaptive feature compression for linear regression. A set of distributed sensors collect disjoint features of regressor data. A fusion center is assumed to contain a pretrai...
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We have demonstrated InGaAs/AlInAsSb separate absorption, charge, and multiplication avalanche photodiodes. The multiplication gain, excess noise, and temperature-dependent dark current have been characterized. InGaAs...
We have demonstrated InGaAs/AlInAsSb separate absorption, charge, and multiplication avalanche photodiodes. The multiplication gain, excess noise, and temperature-dependent dark current have been characterized. InGaAs/AlInAsSb APDs were grown on semi-insulating InP substrates, which is beneficial for bandwidth improvement compared to AlInAsSb APDs grown on GaSb substrates.
In ultrasonic nondestructive evaluation (NDE) of materials an essential step in characterizing an ultrasonic signal is decomposing the patterns of multiple interfering echoes. The Chirplet Transform (CT) is a powerful...
In ultrasonic nondestructive evaluation (NDE) of materials an essential step in characterizing an ultrasonic signal is decomposing the patterns of multiple interfering echoes. The Chirplet Transform (CT) is a powerful method to analyze the echoes in an ultrasonic signal. However, CT analysis is computationally heavy and impractical. Motivated by achieving real-time execution of the CT this research presents a speed-optimized implementation of the chirplet functions on FPGA. Chirplet echo generation used in Fast Chirplet Decomposition (FCD) Algorithm for ultrasonic signal analysis necessitates the frequent generation of chirplet functions with a 6-degree of freedom associated with chirplet parameters including the amplitude scaler; the time of arrival; the Gaussian envelope scaler; the phase of the chirplet; the center frequency and the frequency sweep. By minimizing the processing time of the chirplet generation, the FCD algorithm can be implemented efficiently on FPGA System-on-Chip (SoC). This study presents the hardware realization of the chirplet function on FPGA which is 37 times faster compared to using a Teensy 4.0 microcontroller, and 146 times faster than a highly popular Raspberry Pi 4.0 single board computer.
The utilization of data analytics to gain insights into the game of basketball has seen a remarkable surge in the past decade. Leagues such as the National Basketball Association are continuously exploring innovative ...
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ISBN:
(数字)9798350330649
ISBN:
(纸本)9798350330656
The utilization of data analytics to gain insights into the game of basketball has seen a remarkable surge in the past decade. Leagues such as the National Basketball Association are continuously exploring innovative methods to analyze game data, an approach that has significantly influenced the dynamics of the game. But to perform these analyses, a growing amount of data is needed, which is traditionally annotated by humans. This work proposes a 3-stage system able to automatically acquire relevant basketball game data from a broadcast video. The first stage is an object detector combined with a tracking algorithm to extract the main elements present in a basketball game video. Then, the players' visual information is analyzed to identify the players based on pixel color analysis and number recognition. Finally, a statistics generation algorithm assigns the game events to the corresponding player and team, so that the system can be used as an aid for box score annotation in major leagues, low-cost annotation in amateur games, or in-depth game video analysis.
This paper presents a multifunctional quadruped robot, specifically engineered for comprehensive air quality monitoring and emergency assistance. Designed to navigate through urban environments, the robot autonomously...
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ISBN:
(数字)9798350330649
ISBN:
(纸本)9798350330656
This paper presents a multifunctional quadruped robot, specifically engineered for comprehensive air quality monitoring and emergency assistance. Designed to navigate through urban environments, the robot autonomously collects and transmits real-time air quality data to a centralized database. This interdisciplinary paper integrates robotics, environmental science, and emergency response protocols to propose novel solutions for smart city infrastructure, public health, and disaster management. Specifically, this research highlights the critical role that autonomous systems play in monitoring environmental conditions and advancing safety protocols. This research leverages a comprehensive array of sensors including CO2 (MH-Z19), particle (SDS 011), GPS (ADA 746), DHT 22, MQ 9, and ADS 1115 converter, each meticulously implemented to ensure precise environmental data collection and analysis. Furthermore, the integration of cutting-edge technologies such as Robot Operating System (ROS), .NET MAUI, Python, and MariaDB establishes a robust framework for seamless operation, data processing, and secure storage within the quadruped robot system.
In this paper, we investigate the fault-tolerant path following control problem for an overactuated underwater vehicle subject to input saturation and rate of change constraints, actuator faults and parametric (mass a...
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In this paper, we investigate the fault-tolerant path following control problem for an overactuated underwater vehicle subject to input saturation and rate of change constraints, actuator faults and parametric (mass and inertia) uncertainty. A robust adaptive control allocation strategy is proposed capable to reconfigure the distribution of the control effort among the remaining healthy actuators in the case some of them failed. The online estimation of actuators' effectiveness and bias fault parameters is integrated with the control allocation and reconfiguration unit. The robustness and performance of the scheme are shown by evaluating the results of simulations and pool experiments of different path-following control problems using overactuated underwater vehicles.
Tin-vacancy centres in diamond are spin-photon interfaces with intrinsic environmental noise insensitivity. We reveal their high optical coherence in a nanostructured environment and generate single photons with a 99....
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ISBN:
(纸本)9781957171258
Tin-vacancy centres in diamond are spin-photon interfaces with intrinsic environmental noise insensitivity. We reveal their high optical coherence in a nanostructured environment and generate single photons with a 99.7% purity and an indistinguishability of 63(9)%. [1]
Bilevel optimization is an important class of optimization problems where one optimization problem is nested within another. While various methods have emerged to address unconstrained general bilevel optimization pro...
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Distributed detection (DD) is an area of interest in the Cognitive Radio (CR) Network domain. With the help of dispersed sensors and a Fusion Center (FC), a DD system can detect the presence or absence of a primary us...
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Distributed detection (DD) is an area of interest in the Cognitive Radio (CR) Network domain. With the help of dispersed sensors and a Fusion Center (FC), a DD system can detect the presence or absence of a primary user in a licensed band. But this process can be hindered by fading which is a significant issue in wireless communications. In this paper, we study the detection of a Rayleigh faded signal with a two-sensor network. The problem is equivalent to the detection of bivariate exponential distributions. By calculating the probability of detection error (P e ), we examine how accurately a DD system can detect a signal in that condition. We apply Genetic Algorithm (GA) to find a sub-optimal solution for the local quantizers.
The three-phase dual active bridge plays a pivotal role in the power transfer, owing to its higher-power density with respect to single phase variant. However, it suffers from a low efficiency during operation at ligh...
The three-phase dual active bridge plays a pivotal role in the power transfer, owing to its higher-power density with respect to single phase variant. However, it suffers from a low efficiency during operation at light load conditions due to loss of soft device switching. By dividing the phase secondary winding into two, unevenly, the efficiency can be improved by ensuring soft switching at low load conditions with appropriate phase shift angles between the primary and secondary voltages. Thus, this paper provides a detailed mathematical analysis for three phase transformers, which shows the effect of phase secondary windings partitioning on the phase shift angles of induced voltages.
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