检索结果-内蒙古大学图书馆

Multi-fidelity Gaussian process based empirical potential development for Si:H nanowires

Theoretical & Applied Mechanics Letters 2020年第3期10卷 195-201页

作者： Moonseop Kim Huayi Yin Guang Lin School of Mechanical Engineering Purdue UniversityWest LafayetteIN 47906-2045USA School of Computer and Information Engineering Xiamen University of TechnologyXiamen 361024China Department of Mathematics Purdue UniversityWest LafayetteIN 47906-2045USA

In material modeling,the calculation speed using the empirical potentials is fast compared to the first principle calculations,but the results are not as accurate as of the first principle *** principle calculations are accurate but slow and very expensive to *** this work,first,the H-H binding energy and H2-H2 interaction energy are calculated using the first principle calculations which can be applied to the Tersoff empirical ***,the H-H parameters are *** fitting H-H parameters,the mechanical properties are ***,to integrate both the low-fidelity empirical potential data and the data from the high-fidelity firstprinciple calculations,the multi-fidelity Gaussian process regression is employed to predict the HH binding energy and the H2-H2 interaction *** results demonstrate the accuracy of the developed empirical potentials.

关键词： Multi-fidelity Gaussian process regression Inter-atomic potential and forces Elasticity

来源：评论

学校读者我要写书评

暂无评论

Secured Banking Systems for Critical Fraud Detection using Machine Learning Model

Secured Banking Systems for Critical Fraud Detection using M...

引用

International Conference on Computing and Networking technology (ICCNT)

作者： Sagar Varma Samanthapudi Piyush Rohella Sheetal Temara T. Kiruthiga Applied Data Science The Polis Center at Indiana University Purdue University Indianapolis Indiana polis Indiana USA Payments & Commerce GoDaddy Edmonds Washington USA Dept of Computer & Information Sciences University of the Cumberlands Williamsburg KY USA Department of ECE Vetri Vinayaha College of Engineering and Technology Trichy Tamil Nadu INDIA

ISBN: (数字)9798350370249

ISBN: (纸本)9798350370270

The goal of computerized fraud detection in online banking systems is to identify and save you fraudulent transactions in actual time. Device-gaining knowledge of strategies can provide a powerful means to detect anomalies in consumer behavior that might suggest feasible fraud. This consists of spotting transactions that can be out of the norm, primarily based on purchaser spending habits, and using exceptionally sophisticated algorithms to discover complex styles of fraudulent pastimes. Similarly, gadgets gaining knowledge of fashions may be used to identify suspicious consumer behavior and expect future fraudulent sports. With the aid of leveraging device learning, banks can proactively screen accounts for signs of fraud and speedy cope with online safety threats.

关键词： Consumer behavior Online banking Computational modeling Machine learning Fraud Safety Sports

来源：评论

学校读者我要写书评

暂无评论

Path Tracking Using Echoes in an Unknown Environment: The Issue of Symmetries and How to Break Them

引用

International Journal of Computational Geometry and Applications 2024年第3-4期34卷 89-111页

作者： Boutin, Mireille Kemper, Gregor Department of Mathematics and Computer Science Technische Universiteit Eindhoven P.O. Box 513 Eindhoven 5600 MB Netherlands Department of Mathematics Purdue University 150 N. University St. West Lafayette 47907 IN United States Technical University of Munich Germany TUM School of Computation Information and Technology Department of Mathematics Boltzmannstr. 3 Garching bei München 85748 Germany

This paper deals with the problem of reconstructing the path of a vehicle in an unknown environment consisting of planar structures using sound. Many systems in the literature do this by using a loudspeaker and microphones mounted on a vehicle. Symmetries in the environment lead to solution ambiguities for such systems. We propose to resolve this issue by placing the loudspeaker at a fixed location in the environment rather than on the vehicle. The question of whether this will remove ambiguities regardless of the environment geometry leads to a question about breaking symmetries that can be phrased in purely mathematical terms. We solve this question in the affirmative if the geometry is in dimension three or bigger, and give counterexamples in dimension two. Excluding the rare situations where the counterexamples arise, we also give an affirmative answer in dimension two. Our results lead to a simple path reconstruction algorithm for a vehicle carrying four microphones navigating within an environment in which a loudspeaker at a fixed position emits short bursts of sounds. This algorithm could be combined with other methods from the literature to construct a path tracking system for vehicles navigating within a potentially symmetric environment. © 2024 World Scientific Publishing Company.

关键词： acoustic SLAM Cayley-Menger matrix Euclidean symmetries hyperplane arrangements localization path reconstruction SLAM

来源：评论

学校读者我要写书评

暂无评论

Design of Solar Panels Efficiency Monitoring System

Design of Solar Panels Efficiency Monitoring System

引用

2020 IEEE International Conference on Consumer Electronics - Asia, ICCE-Asia 2020

作者： Lee, Soomin Lee, Sehyeong Ellis, Laith Smith, Anthony H Lee, Minsun Chungnam National University Dept. Computer Science and Engineering Korea Republic of Purdue University Dept. Computer and Information Technology United States

ISBN: (纸本)9781728161648

Agriculture has seen new technological advances with its implementation of the Internet of Things (IoT). These new technologies come with unique challenges, such as maintaining reliable power supply for IoT. Farmers need to achieve stable power delivery and a consistent quantity of power. This paper describes a software based on system architecture for continuous monitoring of solar panels efficiency. The system collects various data, including the surface temperature of the solar panels, degree of power charge, weather information, and other technical data. The different components that carry out this data collection include a Wireless Sensor Network (WSN), OpenWeatherMap Application Programming Interface (API), and the equipment of Victron Energy and Dragino. The final result is a web-based GUI that displays all of the data collected, which can be easily presented to farmers allowing them to monitor solar energy efficiency in real-time. © 2020 IEEE.

关键词： Internet of things

来源：评论

学校读者我要写书评

暂无评论

Control of Reaction-Diffusion Processes Under Communication Delays

Control of Reaction-Diffusion Processes Under Communication ...

引用

European Control Conference (ECC)

作者： Luca Ballotta Juncal Arbelaiz Vijay Gupta Luca Schenato Mihailo R. Jovanović Delft Center for Systems and Control Delft University of Technology Delft The Netherlands Department of Mechanical and Aerospace Engineering Center for Statistics and Machine Learning Princeton University Princeton NJ USA Elmore Family School of Electrical and Computer Engineering Purdue University West Lafayette IN USA Department of Information Engineering University of Padova Padova Italy Ming Hsieh Department of Electrical and Computer Engineering University of Southern California Los Angeles CA USA

ISBN: (数字)9783907144107

ISBN: (纸本)9798331540920

In this paper we investigate the design of optimal spatially distributed controllers for a linear and spatially invariant reaction-diffusion process over the real line. The controller receives state measurements from different spatial locations with non-negligible delays. In this set-up and for the class of proportional spatially invariant state feedback controllers, the optimal control synthesis problem is equivalent to a feedback gain optimization for a spatially distributed delay system. We show that the spatial locality of optimal feedback gains is affected not only by diffusion and reaction coefficients, but also by the parameter representing communication time-delay that causes a sharp flattening of the control gains. In the expensive control regime, the optimal controller is solved analytically, yielding some practical design guidelines.

关键词： State feedback Delay systems Design methodology Process control Optimal control Europe Delays

来源：评论

学校读者我要写书评

暂无评论

Event Detection Explorer: An Interactive Tool for Event Detection Exploration

arXiv

引用

arXiv 2022年

作者： Zhang, Wenlong Ingale, Bhagyashree Shabir, Hamza Li, Tianyi Shi, Tian Wang, Ping Dept. of Computer Science Stevens Institute of Technology HobokenNJ United States Dept. of Computer and Information Technology Purdue University West LafayetteIN United States Moody’s Analytics New YorkNY United States

Event Detection (ED) is an important task in natural language processing. In the past few years, many datasets have been introduced for advancing ED machine learning models. However, most of these datasets are under-explored because not many tools are available for people to study events, trigger words, and event mention instances systematically and efficiently. In this paper, we present an interactive and easy-to-use tool, namely ED Explorer, for ED dataset and model exploration. ED Explorer consists of an interactive web application, an API, and an NLP toolkit, which can help both domain experts and non-experts to better understand the ED task. We use ED Explorer to analyze a recent proposed large-scale ED datasets (referred to as MAVEN), and discover several underlying problems, including sparsity, label bias, label imbalance, and debatable annotations, which provide us with directions to improve the MAVEN dataset. The ED Explorer can be publicly accessed through http://***/. The demonstration video is available here https://***/watch?v=6QPnxPwxg50. Copyright © 2022, The Authors. All rights reserved.

关键词： Natural language processing systems

来源：评论

学校读者我要写书评

暂无评论

Image deconvolution for optical small satellite with deep learning and real-time GPU acceleration

Image deconvolution for optical small satellite with deep le...

引用

作者： Ngo, Tan D. Bui, Tuyen T. Pham, Tuan M. Thai, Hong T. B. Nguyen, Giang L. Nguyen, Tu N. Space Technology Institute Vietnam Academy of Science and Technology Hanoi Viet Nam Institute of Science and Technology Ministry of Public Security Hanoi Viet Nam Institute of Information Technology Vietnam Academy of Science and Technology Hanoi Viet Nam Department of Computer Science Purdue University Fort Wayne Fort WayneIN46805 United States

In-orbit optical-imaging instruments may suffer from degradations due to space environment impacts or long-time operation. The degradation causes blurring on the image received from the ground. Degradations come from defocus and spherical aberrations cause blurring on the received image. Image deblurring should be done in pre-processing step to compensate the sensor bad impacts. The aberrations are modeled by Zernike polynomials and treated by deep learning in deblurring method. This paper presents a method to deconvolve the acquired data to improve the image quality. A convolution neural network is trained to estimate the point spread function (PSF) parameters using acquired images over satellite calibration site with specific pattern. Image deconvolution is performed to obtain image signal-to-noise (SNR) and modulation transfer function (MTF) improvement. Technical and image data used for modeling and experiment are used from VNREDSat-1 satellite (the first operational Vietnam Earth observation optical small satellite). The experiment is performed on computers accelerated by graphics processing units (GPU) to ensure fast computation. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Optical transfer function

来源：评论

学校读者我要写书评

暂无评论

Mixed Motivation Driven Social Multi-Agent Reinforcement Learning for Autonomous Driving

引用

IEEE/CAA Journal of Automatica Sinica 2025年第6期12卷 1272-1282页

作者： Long Chen Peng Deng Lingxi Li Xuemin Hu State Key Laboratory of Multimodal Artificial Intelligence Systems and the State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing WAYTOUS Inc. Beijing Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ) Shenzhen Institute of Artificial Intelligence and Robotics Xi'an Jiaotong University Xi'an China School of Computer Science and Information Engineering Hubei University Wuhan China Purdue School of Engineering and Technology Indiana University-Purdue University Indianapolis Indianapolis IN USA School of Artificial Intelligence Hubei University Wuhan Key Laboratory of Intelligent Sensing System and Security (Hubei University) Ministry of Education Wuhan China

Despite great achievement has been made in autonomous driving technologies, autonomous vehicles (AVs) still exhibit limitations in intelligence and lack social coordination, which is primarily attributed to their reliance on single-agent technologies, neglecting inter-AV interactions. Current research on multi-agent autonomous driving (MAAD) predominantly focuses on either distributed individual learning or centralized cooperative learning, ignoring the mixed-motive nature of MAAD systems, where each agent is not only self-interested in reaching its own destination but also needs to coordinate with other traffic participants to enhance efficiency and safety. Inspired by the mixed motivation of human driving behavior and their learning process, we propose a novel mixed motivation driven social multi-agent reinforcement learning method for autonomous driving. In our method, a multi-agent reinforcement learning (MARL) algorithm, called Social Learning Policy Optimization (SoLPO), which takes advantage of both the individual and social learning paradigms, is proposed to empower agents to rapidly acquire self-interested policies and effectively learn socially coordinated behavior. Based on the proposed SoLPO, we further develop a mixed-motive MARL method for autonomous driving combined with a social reward integration module that can model the mixed-motive nature of MAAD systems by integrating individual and neighbor rewards into a social learning objective for improved learning speed and effectiveness. Experiments conducted on the MetaDrive simulator show that our proposed method outperforms existing state-of-the-art MARL approaches in metrics including the success rate, safety, and efficiency. More-over, the AVs trained by our method form coordinated social norms and exhibit human-like driving behavior, demonstrating a high degree of social coordination.

关键词： Measurement Reinforcement learning Safety Driver behavior Autonomous vehicles Optimization

来源：评论

学校读者我要写书评

暂无评论

Characterization of Quantum Frequency Processors

arXiv

引用

arXiv 2023年

作者： Lu, Hsuan-Hao Peters, Nicholas A. Weiner, Andrew M. Lukens, Joseph M. Quantum Information Science Section Oak Ridge National Laboratory Oak RidgeTN37831 United States School of Electrical and Computer Engineering Purdue Quantum Science and Engineering Institute Purdue University West LafayetteIN47907 United States Research Technology Office and Quantum Collaborative Arizona State University TempeAZ85287 United States

Frequency-bin qubits possess unique synergies with wavelength-multiplexed lightwave communications, suggesting valuable opportunities for quantum networking with the existing fiber-optic infrastructure. Although the coherent manipulation of frequency-bin states requires highly controllable multi-spectral-mode interference, the quantum frequency processor (QFP) provides a scalable path for gate synthesis leveraging standard telecom components. Here we summarize the state of the art in experimental QFP characterization. Distinguishing between physically motivated "open box" approaches that treat the QFP as a multiport interferometer, and "black box" approaches that view the QFP as a general quantum operation, we highlight the assumptions and results of multiple techniques, including quantum process tomography of a tunable beamsplitter—to our knowledge the first full process tomography of any frequency-bin operation. Our findings should inform future characterization efforts as the QFP increasingly moves beyond proof-of-principle tabletop demonstrations toward integrated devices and deployed quantum networking experiments. © 2023, CC BY.

关键词： Tomography

来源：评论

学校读者我要写书评

暂无评论

On Relaxed Locally Decodable Codes for Hamming and Insertion-Deletion Errors

arXiv

引用

arXiv 2022年

作者： Block, Alex Blocki, Jeremiah Cheng, Kuan Grigorescu, Elena Li, Xin Zheng, Yu Zhu, Minshen Department of Computer Science Purdue University United States Center on Frontiers of Computing Studies Peking University United States Advanced Institute of Information Technology Peking University United States Department of Computer Science Johns Hopkins University United States

Locally Decodable Codes (LDCs) are error-correcting codes C: Σn → Σm, encoding messages in Σn to codewords in Σm, with super-fast decoding algorithms. They are important mathematical objects in many areas of theoretical computer science, yet the best constructions so far have codeword length m that is super-polynomial in n, for codes with constant query complexity and constant alphabet size. In a very surprising result, Ben-Sasson, Goldreich, Harsha, Sudan, and Vadhan (SICOMP 2006) show how to construct a relaxed version of LDCs (RLDCs) with constant query complexity and almost linear codeword length over the binary alphabet, and used them to obtain significantly-improved constructions of Probabilistically Checkable Proofs. In this work, we study RLDCs in the standard Hamming-error setting, and introduce their variants in the insertion and deletion (Insdel) error setting. Standard LDCs for Insdel errors were first studied by Ostrovsky and Paskin-Cherniavsky (information Theoretic Security, 2015), and are further motivated by recent advances in DNA random access bio-technologies (Banal et al., Nature Materials, 2021), in which the goal is to retrieve individual files from a DNA storage database. Our first result is an exponential lower bound on the length of Hamming RLDCs making 2 queries (even adaptively), over the binary alphabet. This answers a question explicitly raised by Gur and Lachish (SICOMP 2021) and is the first exponential lower bound for RLDCs. Combined with the results of Ben-Sasson et al., our result exhibits a "phase-transition"-type behavior on the codeword length for some constant-query complexity. We achieve these lower bounds via a transformation of RLDCs to standard Hamming LDCs, using a careful analysis of restrictions of message bits that fix codeword bits. We further define two variants of RLDCs in the Insdel-error setting, a weak and a strong version. On the one hand, we construct weak Insdel RLDCs with almost linear codeword length and const

关键词： Decoding

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：