检索结果-内蒙古大学图书馆

IoT environmental analyzer using sensors and machine learning for migraine occurrence prevention 18

学校读者我要写书评

暂无评论

IoT environmental analyzer using sensors and machine learnin...

18th IEEE International Conference on Machine Learning and Applications, ICMLA 2019

作者： Day, Rosemarie J. Salehi, Hassan Javadi, Mahsa Data Science Program Worcester Polytechnic Institute WorcesterMA United States Department of Electrical and Computer Engineering California State University Chico ChicoCA United States Division of Genetic Research University of Connecticut Health Center FarmingtonCT United States

ISBN: (纸本)9781728145495

Everyday migraines are affecting more than one billion people worldwide. This headache disorder is classified as the sixth most disabling disease in the world. Migraines are just one chronic illness affected by environmental triggers due to changes that occur inside the home. Migraines share this characteristic with sinus headaches and thus are often misdiagnosed. In this research work, an iOS-based environmental analyzer was designed, implemented and evaluated for migraine sufferers with the use of sensors. After the data collection and cleaning, five machine learning model were used to estimate prediction accuracy of migraines in terms of the environment. The data was evaluated against the models using K-Fold cross validation. The algorithm accuracy comparison showed that Linear Discriminant Analysis (LDA) produced highest accuracy for the testing data at a mean of 0.938. Preliminary results demonstrate the feasibility of using machine learning algorithms to perform the automated recognition of migraine trigger areas in the environment. © 2019 IEEE.

关键词： Internet of things

Age of Information: An Introduction and Survey

学校读者我要写书评

暂无评论

arXiv 2020年

作者： Yates, Roy D. Sun, Yin Richard Brown, D. Kaul, Sanjit K. Modiano, Eytan Ulukus, Sennur WINLAB ECE Department Rutgers University NJ United States Department of ECE Auburn University AuburnAL36849 United States Department of Electrical and Computer Engineering Worcester Polytechnic Institute WorcesterMA01609 United States Wireless Systems Lab IIIT-Delhi India CambridgeMA United States Department of Electrical and Computer Engineering University of Maryland College ParkMD20742 United States

We summarize recent contributions in the broad area of age of information (AoI). In particular, we describe the current state of the art in the design and optimization of low-latency cyberphysical systems and applications in which sources send time-stamped status updates to interested recipients. These applications desire status updates at the recipients to be as timely as possible;however, this is typically constrained by limited system resources. We describe AoI timeliness metrics and present general methods of AoI evaluation analysis that are applicable to a wide variety of sources and systems. Starting from elementary single-server queues, we apply these AoI methods to a range of increasingly complex systems, including energy harvesting sensors transmitting over noisy channels, parallel server systems, queueing networks, and various single-hop and multi-hop wireless networks. We also explore how update age is related to MMSE methods of sampling, estimation and control of stochastic processes. The paper concludes with a review of efforts to employ age optimization in cyberphysical applications. Copyright © 2020, The Authors. All rights reserved.

关键词： Energy harvesting

ON THE GRAPHON MEAN FIELD GAME EQUATIONS: INDIVIDUAL AGENT AFFINE DYNAMICS AND MEAN FIELD DEPENDENT PERFORMANCE FUNCTIONS

学校读者我要写书评

暂无评论

arXiv 2020年

作者： Caines, Peter E. Ho, Daniel Huang, Minyi Jian, Jiamin Song, Qingshuo The Department of Electrical and Computer Engineering McGill University Montreal Canada The Department of Mathematics City University of Hong Kong Hong Kong The School of Mathematics and Statistics Carleton University OttawaON Canada The Department of Mathematical Sciences Worcester Polytechnic Institute United States

This paper establishes unique solvability of a class of Graphon Mean Field Game equations. The special case of a constant graphon yields the result for the Mean Field Game *** Codes 35M30, 60J60 Copyright © 2020,...

关键词：

Maximum a posteriori probability (MAP) joint fine frequency offset and channel estimation for mimo systems with channels of arbitrary correlation

学校读者我要写书评

暂无评论

arXiv 2019年

作者： Zhou, Mingda Feng, Zhe Huang, Xinming Liu, Youjian [Eugene] Department of Electrical Computer & Energy Engineering University of Colorado Boulder United States Department of Electrical and Computer Engineering Worcester Polytechnic Institute

Channel and frequency offset estimation is a classic topic with a large body of prior work using mainly maximum likelihood (ML) approach together with Cramér-Rao Lower bounds (CRLB) analysis. We provide the maximum a posteriori (MAP) estimation solution which is particularly useful for for tracking where previous estimation can be used as prior knowledge. Unlike the ML cases, the corresponding Bayesian Cramér-Rao Lower bound (BCRLB) shows clear relation with parameters and a low complexity algorithm achieves the BCRLB in almost all SNR range. We allow the time invariant channel within a packet to have arbitrary correlation and mean. The estimation is based on pilot/training signals. An unexpected result is that the joint MAP estimation is equivalent to an individual MAP estimation of the frequency offset first, again different from the ML results. We provide insight on the pilot/training signal design based on the BCRLB. Unlike past algorithms that trade performance and/or complexity for the accommodation of time varying channels, the MAP solution provides a different route for dealing with time variation. Within a short enough (segment of) packet where the channel and CFO are approximately time invariant, the low complexity algorithm can be employed. Similar to belief propagation, the estimation of the previous (segment of) packet can serve as the prior knowledge for the next (segment of) packet. Copyright © 2019, The Authors. All rights reserved.

关键词： MIMO systems

Adaptable Energy Storage System Control for Microgrid Stability enhancement

学校读者我要写书评

暂无评论

Adaptable Energy Storage System Control for Microgrid Stabil...

2018 IEEE Power and Energy Society General Meeting, PESGM 2018

作者： Zhang, Tan Orr, John Andrew Eigeles Emanuel, Alexander Department of Electrical and Computer Engineering Worcester Polytechnic Institute WorcesterMA01609-2280 United States

ISBN: (纸本)9781538677032

This study highlights the potential benefits of flexibly utilizing a battery energy storage system (BESS) to enhance the stability of a microgrid. The goal of this paper is to propose an adaptable fast frequency regulation strategy using a BESS. This work presents a novel converter nonlinear droop control with droop gain dependent on the Phase-Locked Loop (PLL) frequency measurement. Compared with traditional linear droop control, this new adaptable nonlinear droop demonstrates additional stability margin of the controller without performance sacrifice. A fast secondary control loop works contemporaneously to help the microgrid frequency return to the nominal value with a zero steady state error. Simulation results reveal the robustness of the control under both fault induced islanding and load switching during microgrid autonomous operation. © 2018 IEEE.

关键词： System stability

Ultraheavy dark matter search with electron microscopy of geological quartz

学校读者我要写书评

暂无评论

Physical Review D 2021年第1期104卷 015041-015041页

作者： Reza Ebadi Anubhav Mathur Erwin H. Tanin Nicholas D. Tailby Mason C. Marshall Aakash Ravi Raisa Trubko Roger R. Fu David F. Phillips Surjeet Rajendran Ronald L. Walsworth Department of Physics University of Maryland College Park Maryland 20742 USA Quantum Technology Center University of Maryland College Park Maryland 20742 USA Department of Physics and Astronomy Johns Hopkins University 3400 N. Charles Street Baltimore Maryland 21218 USA Department of Earth and Planetary Sciences American Museum of Natural History New York New York 10024 USA Department of Electrical and Computer Engineering University of Maryland College Park Maryland 20742 USA Harvard-Smithsonian Center for Astrophysics Cambridge Massachusetts 02138 USA Department of Physics Worcester Polytechnic Institute Worcester Massachusetts 01609 USA Department of Physics Harvard University Cambridge Massachusetts 02138 USA Department of Earth and Planetary Sciences Harvard University Cambridge Massachusetts 02138 USA

Self-interactions within the dark sector could clump dark matter into heavy composite states with low number density, leading to a highly suppressed event rate in existing direct detection experiments. However, the large interaction cross section between such ultraheavy dark matter (UHDM) and standard model matter results in a distinctive and compelling signature; long, straight damage tracks as they pass through and scatter with matter. In this work, we propose using geologically old quartz samples as large-exposure detectors for UHDM. We describe a high-resolution readout method based on electron microscopy, characterize the most favorable geological samples for this approach, and study its reach in a simple model of the dark sector. The advantage of this search strategy is twofold; the age of geological quartz compensates for the low number density of ultraheavy composite dark matter, and the distinct geometry of the damage track serves as a high-fidelity background rejection tool.

关键词： Dark matter Particle dark matter Dark matter detectors

Linear temporal logic satisfaction in adversarial environments using secure control barrier certificates

学校读者我要写书评

暂无评论

arXiv 2019年

作者： Ramasubramanian, Bhaskar Niu, Luyao Clark, Andrew Bushnell, Linda Poovendran, Radha Department of Electrical and Computer Engineering University of Washington SeattleWA98195 United States Department of Electrical and Computer Engineering Worcester Polytechnic Institute WorcesterMA01609 United States

This paper studies the satisfaction of a class of temporal properties for cyber-physical systems (CPSs) over a finite-time horizon in the presence of an adversary, in an environment described by discrete-time dynamics. The temporal logic specification is given in saf e− LTLF, a fragment of linear temporal logic over traces of finite length. The interaction of the CPS with the adversary is modeled as a two-player zero-sum discrete-time dynamic stochastic game with the CPS as defender. We formulate a dynamic programming based approach to determine a stationary defender policy that maximizes the probability of satisfaction of a saf e−LTLF formula over a finite time-horizon under any stationary adversary policy. We introduce secure control barrier certificates (S-CBCs), a generalization of barrier certificates and control barrier certificates that accounts for the presence of an adversary, and use S-CBCs to provide a lower bound on the above satisfaction probability. When the dynamics of the evolution of the system state has a specific underlying structure, we present a way to determine an S-CBC as a polynomial in the state variables using sum-of-squares optimization. An illustrative example demonstrates our approach. Copyright © 2019, The Authors. All rights reserved.

关键词： Embedded systems

Learning to Estimate Centers of Mass of Arbitrary Objects

学校读者我要写书评

暂无评论

Learning to Estimate Centers of Mass of Arbitrary Objects

2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Sean McGovern Huitan Mao Jing Xiao Robotics Engineering Program Worcester Polytechnic Institute Department of Computer Science University of North Carolina at Charlotte

This paper introduces a reinforcement learning algorithm with robot manipulation to learn an arbitrary object's center of mass whose physical material composition is unknown. Robot learning is through manipulation of the object in a sequence of actions. The effectiveness of the algorithm is demonstrated in simulation to locate the centers of mass of rocks with complex shapes, with even or uneven mass distributions, and confirmed by vertically stacking the rocks along their learned centers of mass both in simulation and in real experiments.

关键词：

Robot Co-design: Beyond the Monotone Case

学校读者我要写书评

暂无评论

arXiv 2019年

作者： Carlone, Luca Pinciroli, Carlo Massachusetts Institute of Technology United States Robotics Engineering Department of Computer Science Worcester Polytechnic Institute United States

Recent advances in 3D printing and manufacturing of miniaturized robotic hardware and computing are paving the way to build inexpensive and disposable robots. This will have a large impact on several applications including scientific discovery (e.g., hurricane monitoring), search-and-rescue (e.g., operation in confined spaces), and entertainment (e.g., nano drones). The need for inexpensive and task-specific robots clashes with the current practice, where human experts are in charge of designing hardware and software aspects of the robotic platform. This makes the robot design process expensive and time consuming, and ultimately unsuitable for small-volumes low-cost applications. This paper considers the computational robot co-design problem, which aims to create an automatic algorithm that selects the best robotic modules (sensing, actuation, computing) in order to maximize the performance on a task, while satisfying given specifications (e.g., maximum cost of the resulting design). We propose a binary optimization formulation of the co-design problem and show that such formulation generalizes previous work based on strong modeling assumptions. We show that the proposed formulation can solve relatively large co-design problems in seconds and with minimal human intervention. We demonstrate the proposed approach in two applications: the co-design of an autonomous drone racing platform and the co-design of a multi-robot system.68T40, 70B15, 70E60, 46N10 Copyright © 2019, The Authors. All rights reserved.

关键词： 3D printers