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Fall Meeting of the Eastern States Section of the Combustion institute 2009

作者： Rockwell, S. Rangwala, A. Klein, A. Department of Fire Protection Engineering Worcester Polytechnic Institute WorcesterMA01609 United States Department of Electrical and Computer Engineering Worcester Polytechnic Institute WorcesterMassachusetts01609 United States

ISBN: (纸本)9781615676682

Since the early 1970's Cross Correlation Velocimetry (CCV) has been used to measure velocity of turbulent flows. This study explores the use of the cross correlation coefficient decay towards estimation of characteristic turbulent length scales typically found in a fire. To test the theory, experiments were performed in a turbulent free jet and a natural gas fire plume. The experiments showed that CCV measurements were comparable to the velocity decay obtained using Laser Doppler Anemometer (LDA). Ultimately, a prototype probe was developed that could measure temperature, velocity, and flow width simultaneously in the plume of a natural gas burner. This allows for a direct estimation of the mass flow in a fire plume. Copyright © 2009 by The Combustion institute.

关键词： Velocity measurement

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Memristor state to logic mapping for optimal noise margin in memristor memories 14

Memristor state to logic mapping for optimal noise margin in...

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2014 14th IEEE International Conference on Nanotechnology, IEEE-NANO 2014

作者： Smaili, Sami Massoud, Yehia Electrical and Computer Engineering Department Worcester Polytechnic Institute WorcesterMA01609 United States

ISBN: (纸本)9781479956227

Memristor memories provide non-volatile and high density solutions that can overcome some of the challenges faced by CMOS technology. Memristor memories use the memristor as a resistor and depict a logic 1 by a high resistance state and a logic 0 by a low resistance state. Typically, the memristor's resistance range is divided in half, and a state falling in the lower half depicts a logic 0 and the higher half depicts a logic 1. We show in this paper that it is better to use an unequal division of the range to define the resistance state corresponding to a given logic state. We show how this division can be optimized to provide the highest noise margin. © 2014 IEEE.

关键词： Memristors

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Time-slotted round-trip carrier synchronization

Time-slotted round-trip carrier synchronization

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41st Asilomar Conference on Signals, Systems and computers, ACSSC

作者： Ozil, Ipek Brown III, D. Richard Electrical and Computer Engineering Department Worcester Polytechnic Institute Worcester MA 01609 United States

ISBN: (纸本)9781424421107

We consider the problem of synchronizing the carriers of two sources in a wireless communication system with one destination. Carrier synchronization has been considered recently in cooperative communication systems where the sources wish to pool their antenna resources and transmit as a "distributed beamformer". Based on the concept of round-trip carrier synchronization first described in [1], we propose a new time-slotted round-trip carrier synchronization system and describe its implementation in systems with single-path or multipath channels. The performance of the time-slotted round-trip carrier synchronization system is investigated in terms of the phase offset at the destination and the expected beamforming time before resynchronization is required. Our results suggest that the synchronization overhead can be small with respect to the potential beamforming gains. © 2007 IEEE.

关键词： Beamforming

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Retrodirective distributed transmit beamforming with two-way source synchronization

Retrodirective distributed transmit beamforming with two-way...

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44th Annual Conference on Information Sciences and Systems, CISS 2010

作者： Preuss, Robert D. Brown III, D. Richard Electrical and Computer Engineering Department Worcester Polytechnic Institute Worcester MA 01609 United States

ISBN: (纸本)9781424474172

Distributed transmit beamforming has recently been proposed as a technique in which several single-antenna sources cooperate to form a virtual antenna array and simultaneously transmit with phase-aligned carriers such that the passband signals coherently combine at an intended destination. The power gains of distributed transmit beamforming can provide increased range, rate, energy efficiency, and/or security, as well as reduce interference. Distributed transmit beamforming, however, typically requires precise synchronization between the sources with timing errors on the order of picoseconds. In this paper, a new two-way synchronization protocol is developed to facilitate precise source synchronization and retrodirective distributed transmit beamforming. The two-way synchronization protocol is developed under the assumption that all processing at each source node is performed with local observations in local time. An analysis of the statistical properties of the phase and frequency estimation errors in the two-way synchronization protocol and the resulting power gain of a distributed transmit beamformer using this protocol is provided. Numerical examples are also presented characterizing the performance of distributed transmit beamforming in a system using two-way source synchronization. The numerical results demonstrate that near-ideal beamforming performance can be achieved with low synchronization overhead. ©2010 IEEE.

关键词： Synchronization

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Quickest change point identification across a sensor array

Quickest change point identification across a sensor array

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2012 IEEE Military Communications Conference, MILCOM 2012

作者： Lai, Lifeng Department of Electrical and Computer Engineering Worcester Polytechnic Institute Worcester MA 01609 United States

ISBN: (纸本)9781467317290

The problem of quickly detecting a statistical change and identifying the change source is considered. In the problem studied, there are multiple sensors. A change can first occur at any one of these sensors and propagate to other sensors. One is required to detect the presence of such change with a minimal delay and furthermore identify the sensor that first observes the change. Three performance metrics, namely detection delay, false alarm probability and false identification probability, are of interest. The optimal stopping rule, determining when one should stop sampling and claim a change has occurred, and the optimal terminal decision rule, determining which sensor first observes the change, that minimize a weighted sum of these three performance metrics are characterized. We obtain the optimal solution by first converting the problem at the hand to a Markovian stopping time problem and then solving the problem using tools from the optimal stopping theory. © 2012 IEEE.

关键词： Problem solving

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Outlier Detection and Removal Signal Processing for Wearable Transcutaneous Oxygen Sensor

Outlier Detection and Removal Signal Processing for Wearable...

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2023 IEEE MIT Undergraduate Research Technology Conference, URTC 2023

作者： Leonardi, Abigail Murphy, Ciara Hobson, Sydney Rohera, Vanshika Guler, Ulkuhan Worcester Polytechnic Institute Electrical and Computer Engineering Department WorcesterMA01609 United States

ISBN: (纸本)9798350308600

Respiratory diseases impact millions of people worldwide. In the smart and connected health era, there is a pressing need for reliable medical devices for remote monitoring of patients with respiratory disorders and patients with chronic diseases in general. For respiratory monitoring, there exist widely-used miniaturized photoplethysmography devices to measure peripheral blood oxygen saturation. More recently, transcutaneous oxygen monitors have been designed in a small form factor to be used as wearable devices to enable remote and continuous measurement of transcutaneous oxygen. In this study, we focus on processing the raw data collected from a noninvasive transcutaneous blood gas monitor that is in the development phase. Post-processing should be applied to remove the outliers in the measurements and smooth out the measurement noise. Various filters to remove outliers were tested in MATLAB, including the Hampel, rmoutliers, filloutliers, and moving average filters. The Hampel filter yielded the best results while maintaining the integrity of the data. The fillmissing function in MATLAB using the previous or linear interpolation methods is used to replace outlier data. The comparison of the raw data and the result of the data processing is presented. © 2023 IEEE.

关键词： Blood

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A Survey on 3D LiDAR Localization for Autonomous Vehicles 31

A Survey on 3D LiDAR Localization for Autonomous Vehicles

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31st IEEE Intelligent Vehicles Symposium, IV 2020

作者： Elhousni, Mahdi Huang, Xinming Worcester Polytechnic Institute Electrical and Computer Engineering Department WorcesterMA01609 United States

LiDAR sensors are becoming one of the most essential sensors in achieving full autonomy for self driving cars. LiDARs are able to produce rich, dense and precise spatial data, which can tremendously help in localizing and tracking a moving vehicle. In this paper, we review the latest finding in 3D LiDAR localization for autonomous driving cars, and analyse the results obtained by each method, in an effort to guide the research community towards the path that seems to be the most promising. © 2020 IEEE.

关键词： Autonomous vehicles

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Additively Manufactured Receiver Design for Wirelessly-Powered Biomedical Applications

Additively Manufactured Receiver Design for Wirelessly-Power...

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2023 IEEE Biomedical Circuits and Systems Conference, BioCAS 2023

作者： Marangalou, Amin Hazrati Arturo Gonzalez, Miguel Guler, Ulkuhan Worcester Polytechnic Institute Department of Electrical and Computer Engineering WorcesterMA01609 United States

ISBN: (纸本)9798350300260

This paper presents a miniaturized receiver prototype fabricated using an additive manufacturing electronics process. We aim to demonstrate the feasibility and advantages of using additive manufacturing for embedding the essential components of an inductive link in a compact form factor for miniaturized biomedical devices. We demonstrated various geometries of planar and helical coils, with average diameters of 20 mm. The wireless power transfer system comprises a class-E power amplifier operating at 6.78 MHz, a 10 μH transmitter coil, and a full-wave active rectifier fabricated in TSMC 180 nm CMOS process technology. The power delivered to a 500 Ω load at the output of the active rectifier varies from 2.7 mW to 42 mW for planar coils and 3 mW to 45 mW for helical coils, over a range of 1 cm to 4 cm. The transmitter's power consumption is kept constant at 1.25 W throughout the experiments. Furthermore, in the case of helical coils, a lateral center-to-center misalignment of 1 cm at a distance of 2 cm between the receiver and transmitter results in a 10 mW drop in the output power. © 2023 IEEE.

关键词： Additive manufacturing electronics Coils Implantables Inductive link Power transfer efficiency Wearables Wireless power transfer system

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An Integrated Signal Acquisition AFE for Latency Quantification of ENG Signals

An Integrated Signal Acquisition AFE for Latency Quantificat...

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2019 IEEE MIT Undergraduate Research Technology Conference, URTC 2019

作者： Zhang, Yuchang Chakravarti, Aatreya Tasellari, Michael Guler, Ulkuhan Worcester Polytechnic Institute Department of Electrical and Computer Engineering WorcesterMA01609 United States

ISBN: (纸本)9781728158181

This paper covers the design and simulation results of an analog front-end (AFE) designed for capturing electroneurogram (ENG) signals. The AFE outputs a latency value that can be used by physicians to diagnose disorders affecting the nervous system such as muscular dystrophy. The latency value is calculated as the time between the peaks of two subsequent ENG triphasic responses. To extract an accurate latency, a set of filtering stages are required before the final processing stage. A Verilog analog-mixed signal (-AMS) model is constructed prior to the circuit design to examine the feasibility of the applied technic. The circuit designed and laid out in 0.18 μm TSMC Mixed Signal 5 V process and post-layout results demonstrate a 90 dB increase in the ENG amplitude achieved with a 0.92 mW power consumption showing the success of the filtering stages in removing unwanted noise such as stray electromyogram signals. © 2019 IEEE.

关键词： Integrated circuit manufacture

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People in control

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IEEE Control Systems Magazine 2007年第6期27卷 39-45页

作者： Wang, Yue Liberzon, Daniel Castañón, David Worcester Polytechnic Institute Worcester MA United States Electrical and Computer Engineering Department University of Illinois at Urbana-Champaign Urbana IL United States Electrical and Computer Engineering Department Boston University Boston MA United States

Yue Wang is a graduate student in the Mechanical engineering department of the worcester polytechnic institute. She is currently pursuing her PhD degree in cooperative control. She has studied in Shanghai University where she learned classical and modern control. Daniel Liberzon is involved with the Electrical and computer engineering department of the University of Illinois at Urbana-Champaign. Being a 2007 recipient of the Donald P. Eckman Award, he is the author of Switching in Systems and Control published in 2003 by Birkhauser. David Castanon is the President of the IEEE Control Systems Society (CSS). At the same time, he is a professor in the Electrical engineering department of Boston University.

关键词： Students

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