检索结果-内蒙古大学图书馆

2023 International Conference on Sampling Theory and Applications, SampTA 2023

作者： Leone, Samuel Venkat, Aarthi Huguet, Guillaume Tong, Alexander Wolf, Guy Krishnaswamy, Smita Applied Math Program New HavenCT United States Yale University Computational Biology & Bioinformatics Program New HavenCT United States Université de Montréal Mila - Quebec Ai Institute Dept. of Math. & Stat Montreal Canada Université de Montréal Mila-Quebec Ai Institute Dept. of Comp. Sci. & Oper. Res. Montreal Canada Yale University Department of Computer Science Department of Genetics New HavenCT United States

ISBN: (纸本)9798350328851

While numerous methods have been proposed for computing distances between probability distributions in Euclidean space, relatively little attention has been given to computing such distances for distributions on graphs. However, there has been a marked increase in data that either lies on graph (such as protein interaction networks) or can be modeled as a graph (single cell data), particularly in the biomedical sciences. Thus, it becomes important to find ways to compare signals defined on such graphs. Here, we propose Graph Fourier MMD (GFMMD), a novel distance between distributions and signals on graphs. GFMMD is defined via an optimal witness function that is both smooth on the graph and maximizes the difference in expectation between the pair of distributions on the graph. We find an analytical solution to this optimization problem as well as an embedding of distributions that results from this method. We also prove several properties of this method including scale invariance and applicability to disconnected graphs. We showcase it on graph benchmark datasets as well on single cell RNA-sequencing data analysis. In the latter, we use the GFMMD-based gene embeddings to find meaningful gene clusters. We also propose a novel type of score for gene selection called gene localization score which helps select genes for cellular state space characterization. © 2023 IEEE.

关键词： Genes

来源：评论

学校读者我要写书评

暂无评论

Work in Progress: Utilizing Decision Tree Analysis for Engineering Students’ GPA Prediction

Work in Progress: Utilizing Decision Tree Analysis for Engin...

引用

IEEE World Engineering Education Conference (EDUNINE)

作者： Prateek Shekhar Md Tarique Hasan Khan Sanjeet Gajjar School of Applied Engineering and Technology New Jersey Institute of Technology Newark NJ USA School of Math Engineering & Technology Navajo Technical University Crownpoint NM USA Department of Computer Science New Jersey Institute of Technology Newark NJ USA

Students’ grade point average (GPA) is an important indicator of students’ academic success. In our work-in-progress study, we utilized decision tree analysis to investigate patterns in predicting the GPA of engineering students, considering various demographic, socioeconomic, and academic aspects. Our analysis of the dataset consisting of engineering students’ academic records revealed several key insights. First, SAT scores emerged as a central factor in GPA prediction, with higher scores predicting better GPAs. Second, socioeconomic status also became evident among students with high SAT scores, reflecting the impact of background characteristics on academic achievements. Lastly, parent education level also stood out as significant, showing that students with highly educated parents generally achieved higher GPAs, underlining family educational background's role in success. Overall, our research adds to the existing literature by illuminating the intricate factors influencing engineering students’ GPA and provides an example of utilizing decision tree-based quantitative methods in engineering education research.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Beam Maps of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Measured with a Drone

IEEE Open Journal of Antennas and Propagation

引用

IEEE Open Journal of Antennas and Propagation 2025年第3期6卷 928-940页

作者： Tyndall, Will Reda, Alex Shaw, J. Richard Bandura, Kevin Chakraborty, Arnab Halpern, Mark Harris, Maile Kuhn, Emily MacEachern, Joshua Mena-Parra, Juan Newburgh, Laura Ordog, Anna Pinsonneault-Marotte, Tristan Polish, Anna Rose Saliwanchik, Ben Sanghavi, Pranav Siegel, Seth R. Whitmer, Audrey Wulf, Dallas Yale University Department of Physics New HavenCT06511 United States McGill University Department of Physics MontrealQC Canada McGill University Trottier Space Institute MontrealQC Canada University of British Columbia Department of Physics and Astronomy VancouverBC Canada West Virginia University Department of Computer Science and Electrical Engineering MorgantownWV United States West Virginia University Center for Gravitational Waves and Cosmology MorgantownWV United States Johns Hopkins University Applied Physics Laboratory LaurelMD United States Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive PasadenaCA91109 United States University of Toronto Dunlap Institute for Astronomy and Astrophysics TorontoON Canada David A. Dunlap Department of Astronomy and Astrophysics University of Toronto TorontoON Canada Department of Computer Science Math Physics and Statistics University of British Columbia Okanagan Campus KelownaBC Canada Dominion Radio Astrophysical Observatory Herzberg Astronomy and Astrophysics Research Center National Research Council Canada PentictonBC Canada Center for Astrophysics Harvard and Smithsonian CambridgeMA02138 United States Brookhaven National Laboratory Instrumentation Division UptonNY11973 United States Perimeter Institute for Theoretical Physics WaterlooON Canada

We present beam measurements of the CHIME telescope using a radio calibration source deployed on a drone payload. During test flights, the pulsing calibration source and the telescope were synchronized to GPS time, enabling in-situ background subtraction for the full N2 visibility matrix for one CHIME cylindrical reflector. We use the autocorrelation products to estimate the primary beam width and centroid location, and compare these quantities to solar transit measurements and holographic measurements where they overlap on the sky. We find that the drone, solar, and holography data have similar beam parameter evolution across frequency and both spatial coordinates. This paper presents the first drone-based beam measurement of a large cylindrical radio interferometer. Furthermore, the unique analysis and instrumentation described in this paper lays the foundation for near-field measurements of experiments like CHIME. © 2020 IEEE.

关键词： Drones

来源：评论

学校读者我要写书评

暂无评论

Crystallography of honeycomb formation under geometric frustration

引用

Proceedings of the National Academy of sciences of the United States of America 2022年第48期119卷 e2205043119-e2205043119页

作者： Fard, Golnar Gharooni Zhang, Daisy Jiménez, Francisco López Peleg, Orit Department of Computer Science University of Colorado Boulder 80309 CO United States Department of Computer Science Princeton University 08544 NJ United States Ann and H.J. Smead Department of Aerospace Engineering Sciences University of Colorado Boulder 80309 CO United States Department of Physics University of Colorado Boulder 80309 CO United States Department of Applied Math University of Colorado Boulder 80309 CO United States Department of Ecology and Evolutionary Biology University of Colorado Boulder 80309 CO United States BioFrontiers Institute University of Colorado Boulder 80309 CO United States Santa Fe Institute Santa Fe 87501 NM United States

As honeybees build their nests in preexisting tree cavities, they must deal with the presence of geometric constraints, resulting in nonregular hexagons and topological defects in the comb. In this work, we study how bees adapt to their environment in order to regulate the comb structure. Specifically, we identify the irregularities in honeycomb structure in the presence of various geometric frustrations. We 3D-print experimental frames with a variety of constraints imposed on the imprinted foundations. The combs constructed by the bees show clear evidence of recurring patterns in response to specific geometric frustrations on these starter frames. Furthermore, using an experimental-modeling framework, we demonstrate that these patterns can be successfully modeled and replicated through a simulated annealing process, in which the minimized potential is a variation of the Lennard-Jones potential that considers only first-neighbor interactions according to a Delaunay triangulation. Our simulation results not only confirm the connection between honeycomb structures and other crystal systems such as graphene, but also show that irregularities in the honeycomb structure can be explained as the result of analogous interactions between cells and their immediate surroundings, leading to emergent global order. Additionally, our computational model can be used as a first step to describe specific strategies that bees use to effectively solve geometric mismatches while minimizing cost of comb building. Copyright © 2022 the Author(s). Published by PNAS.

关键词： behavioral assays collective behavior honey bees honeycomb mathematical modelling

来源：评论

学校读者我要写书评

暂无评论

Numerical and analytical calculations of orbit-wise synthetic spectra from two-step gamma-ray fusion reactions 50

Numerical and analytical calculations of orbit-wise syntheti...

引用

50th EPS Conference on Plasma Physics, EPS 2024

作者： Valentini, A. Nocente, M. Eriksson, J. Järleblad, H. Moseev, D. Reman, B.C.G. Rud, M. Snicker, A. Stagner, L. Salewski, M. Department of Physics Technical University of Denmark Kgs Lyngby2800 Denmark Department of Physics University of Milano-Bicocca Milan20126 Italy Department of Physics and Astronomy Uppsala University Uppsala75120 Sweden Department of Appl. Math. & Computer Science Technical University of Denmark Kgs Lyngby2800 Denmark Max-Planck-Institut fur Plasmaphysik Wendelsteinstr. 1 Greifswald17491 Germany Laboratory for Plasma Physics LPP-ERM/KMS BrusselsB-1000 Belgium Department of Applied Physics Aalto University AaltoFI-00076 Finland General Atomics P.O. Box 85608 San DiegoCA92186-5609 United States

来源：评论

学校读者我要写书评

暂无评论

A graph-based convolutional neural network stock price prediction with leading indicators

A graph-based convolutional neural network stock price predi...

引用

作者： Wu, Jimmy Ming-Tai Li, Zhongcui Srivastava, Gautam Tasi, Meng-Hsiun Lin, Jerry Chun-Wei College of Computer Science and Engineering Shandong University of Science and Technology Shandong China Department of Math and Computer Science Brandon University Brandon Canada Research Centre for Interneural Computing China Medical University Taichung Taiwan Department of Management Information Systems National Chung Hsing University Taichung Taiwan Department of Computer Science Electrical Engineering and Mathematical Sciences Western Norway University of Applied Sciences Bergen Norway

The stock market is a capitalistic haven where the issued shares are transferred, traded, and circulated. It bases stock prices on the issue market, however, the structure and trading activities of the stock market are much more complicated than the issue market itself. Therefore, making an accurate prediction becomes an intricate as well as highly difficult task. On the other hand, because of the potential benefits of stock prediction, it attracts generation after generation of scholars as well as investors to continuously develop various prediction methods from different perspectives, a myriad of theories, a multitude of investment strategies, and different practical experiences. In this article, aiming at the task of time series (financial) feature extraction and prediction of price movements, a new convolutional novel neural network that can be called a framework to improve the prediction accuracy of stock trading is proposed. The method that is proposed is called SSACNN, a short form of stock sequence array convolutional neural network. SSACNN collects data including historical data of prices and its leading indicators (options/futures) for a stock to take an array as the input graph of the convolutional neural network framework. In our experimental results, five Taiwanese and American stocks were used as a benchmark to compare with the previous algorithms and proposed algorithm, the motion prediction performance of SSACNN has been improved significantly and proved that it has the potential to be applied in the real financial market. © 2020 John Wiley & Sons Ltd

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

Semi-Implicit Lagrangian Voronoi Approximation for Compressible Viscous Fluid Flows

arXiv

引用

arXiv 2024年

作者： Kincl, Ondřej Peshkov, Ilya Boscheri, Walter Laboratory of Applied Mathematics DICAM University of Trento Trento38123 Italy Laboratoire de Mathématiques UMR 5127 CNRS Université Savoie Mont Blanc Le Bourget du Lac73376 France Department of Mathematics and Computer Science University of Ferrara Ferrara44121 Italy

This paper contributes to the recent investigations of Lagrangian methods based on Voronoi meshes. The aim is to design a new conservative numerical scheme that can simulate complex flows and multi-phase problems with more accuracy than SPH (Smoothed Particle Hydrodynamics) methods but, unlike diffuse interface models on fixed grid topology, does not suffer from the deteriorating quality of the computational grid. The numerical solution is stored at particles, which move with the fluid velocity and also play the role of the generators of the computational mesh, that is efficiently re-constructed at each time step. The main novelty stems from combining a Lagrangian Voronoi scheme with a semi-implicit integrator for compressible flows. This allows to model low-Mach number flows without the extremely stringent stability constraint on the time step and with the correct scaling of numerical viscosity. The implicit linear system for the unknown pressure is obtained by splitting the reversible from the irreversible (viscous) part of the dynamics, and then using entropy conservation of the reversible sub-system to derive an auxiliary elliptic equation. The method, called SILVA (Semi-Implicit Lagrangian Voronoi Approximation), is validated in a variety of test cases that feature diverse Mach numbers, shocks and multi-phase flows. Copyright © 2024, The Authors. All rights reserved.

关键词： Topology

来源：评论

学校读者我要写书评

暂无评论

SCORE: A Second-Order Conic Initialization for Range-Aided SLAM

SCORE: A Second-Order Conic Initialization for Range-Aided S...

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： Alan Papalia Joseph Morales Kevin J. Doherty David M. Rosen John J. Leonard Computer Science and Artificial Intelligence Laboratory (CSAIL) Massachusetts Institute of Technology (MIT) Cambridge MA USA Department of Applied Ocean Physics & Engineering Woods Hole Oceanographic Institution Woods Hole MA USA Department of Electrical & Computer Engineering Northeastern University Boston MA USA Department of Math Northeastern University Boston MA USA

We present a novel initialization technique for the range-aided simultaneous localization and mapping (RA-SLAM) problem. In RA-SLAM we consider measurements of point-to-point distances in addition to measurements of rigid transformations to landmark or pose variables. Standard formulations of RA-SLAM approach the problem as non-convex optimization, which requires a good initialization to obtain quality results. The initialization technique proposed here relaxes the RA-SLAM problem to a convex problem which is then solved to determine an initialization for the original, non-convex problem. The relaxation is a second-order cone program (SOCP), which is derived from a quadratically constrained quadratic program (QCQP) formulation of the RA-SLAM problem. As a SOCP, the method is highly scalable. We name this relaxation Second-order COnic RElaxation for RA-SLAM (SCORE). To our knowledge, this work represents the first convex relaxation for RA-SLAM. We present real-world and simulated experiments which show SCORE initialization permits the efficient recovery of quality solutions for a variety of challenging single- and multi-robot RA-SLAM problems with thousands of poses and range measurements.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Radial kinks in a Schwarzschild-like geometry

引用

Physical Review D 2024年第12期110卷 125025-125025页

作者： Jean-Guy Caputo Tomasz Dobrowolski Jacek Gatlik Panayotis G. Kevrekidis Laboratoire de Mathématiques INSA de Rouen Avenue de l’Université 76801 Saint-Etienne du Rouvray France Department of Computer Physics and Quantum Computing University of the National Education Commission in Krakow Podchora¸żych 2 30-084 Cracow Poland AGH University of Krakow Faculty of Physics and Applied Computer Science 30-059 Krakow Poland Department of Mathematics and Statistics University of Massachusetts Amherst Massachusetts 01003-4515 USA

We study the propagation of a domain wall (kink) of the ϕ4 model in a radially symmetric environment defined by a gravity source. This source introduces a Schwarzschild-like geometry. We introduce an effective model that accurately describes the dynamics of the kink center. This description works well even outside the perturbation region, i.e., even for large masses of the gravitating object. We observed that such a spherical domain wall surrounding a star-type object inevitably “collapses,” i.e., shrinks in radius toward the origin and offer an understanding of the latter phenomenology. The relevant analysis is presented for a circular domain wall and a spherical one.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Across Scales and Across Dimensions: Temporal Super-Resolution Using Deep Internal Learning 1

引用

16th European Conference on computer Vision, ECCV 2020

作者： Zuckerman, Liad Pollak Naor, Eyal Pisha, George Bagon, Shai Irani, Michal Department of Computer Science and Applied Math The Weizmann Institute of Science Rehovot Israel Rehovot Israel Technion Israel Institute of Technology Haifa Israel

ISBN: (数字)9783030585716

ISBN: (纸本)9783030585709

When a very fast dynamic event is recorded with a low-framerate camera, the resulting video suffers from severe motion blur (due to exposure time) and motion aliasing (due to low sampling rate in time). True Temporal Super-Resolution (TSR) is more than just Temporal-Interpolation (increasing framerate). It can also recover new high temporal frequencies beyond the temporal Nyquist limit of the input video, thus resolving both motion-blur and motion-aliasing – effects that temporal frame interpolation (as sophisticated as it may be) cannot undo. In this paper we propose a "Deep Internal Learning" approach for true TSR. We train a video-specific CNN on examples extracted directly from the low-framerate input video. Our method exploits the strong recurrence of small space-time patches inside a single video sequence, both within and across different spatio-temporal scales of the video. We further observe (for the first time) that small space-time patches recur also across-dimensions of the video sequence – i.e., by swapping the spatial and temporal dimensions. In particular, the higher spatial resolution of video frames provides strong examples as to how to increase the temporal resolution of that video. Such internal video-specific examples give rise to strong self-supervision, requiring no data but the input video itself. This results in Zero-Shot Temporal-SR of complex videos, which removes both motion blur and motion aliasing, outperforming previous supervised methods trained on external video datasets. © 2020, Springer Nature Switzerland AG.

关键词： Interpolation

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：