作者：郭勇

学位名称：博士

出处：北京理工大学

发明人：闫方家，李炳照，周志雄，湛冰

申请日期：2022.02.23

摘要：本发明涉及一种基于二维图分数阶傅里叶变换的图数据压缩方法，属于数据压缩技术领域。包括：1)将实际数据建立图数据模型，并依据该模型得到二维图信号；2)计算二维图信号的二维图分数阶傅里叶变换2D‑SGFRFT，得到变换系数；3)将变换系数按照绝对值按照从大到小排列，得到排列后变换系数；4)取不同的压缩比 ...

作者：Urynbassarova, Didar;Li, Bing Zhao;Zhang, Zhi Chao （¹School of Mathematics and Statistics, Beijing Institute of Technology, Beijing; 100081, China;²College of Mathematics, Sichuan University, Chengdu; 610065, China）

出处：IAENG International Journal of Applied Mathematics 2017

摘要：The polynomial Fourier transform (PFT) is a useful mathematical tool for many areas, including applied mathematics, engineering and signal processing. ...

作者：Zhang, Yu;Li, Bing-Zhao （¹School of Mathematics and Statistics, Beijing Institute of Technology, Beijing; 100081, China;²Beijing Key Laboratory on MCAACI, Beijing Institute of Technology, Beijing; 100081, China）

出处：arXiv 2022

摘要：With the wide application of spectral and algebraic theory in discrete signal processing techniques in the field of graph signal processing, an increa ...

作者：Zhao, Hui;Li, Bing-Zhao （¹School of Mathematics and Statistics, Beijing Institute of Technology, Beijing; 100081, China;²Beijing Key Laboratory on MCAACI, Beijing Institute of Technology, Beijing; 100081, China）

出处：arXiv 2022

摘要：The free metaplectic transformation (FMT) is widely used in many fields such as filter design, pattern recognition, image processing and optics. In or ...

作者：Bing Zhan;Qiurui Wang;Zhixiong Zhou;Xiaotian Li;Hongjun Yu;Bingzhao Li;Mingxia Liao （¹ School of Sport Management and Communication, Capital University of Physical Education and Sports, Beijing 100091, China. ² Institute of Artificial Intelligence in Sports, Capital University of Physical Education and Sports, Beijing 100091, China. ³ School of Physical Education and Coaching Science, Capital University of Physical Education and Sports, Beijing 100091, China. ⁴ School of Recreation and Community Sport, Capital University of Physical Education and Sports, Beijing 100091, China. ⁵ Department of Physical Education, Tsinghua University, Beijing 100084, China. ⁶ Department of Mathematics and Statistics, Beijing Institute of Technology, Beijing 100081, China.）

出处：International journal of environmental research and public health 0

关键词：AQI;exercise;older adults;outdoor.

摘要：Background: Exposure to air pollution is associated with an increased risk of all-cause mortality in older adults. Promoting physical activity (PA) an ...

作者：Bing Zhan¹;Qiurui Wang²;Zhixiong Zhou³;Xiaotian Li⁴;Hongjun Yu⁵;Bingzhao Li⁶;Mingxia Liao²; （¹School of Sport Management and Communication, Capital University of Physical Education and Sports, Beijing 100091, China;²Institute of Artificial Intelligence in Sports, Capital University of Physical Education and Sports, Beijing 100091, China;³School of Physical Education and Coaching Science, Capital University of Physical Education and Sports, Beijing 100091, China;⁴School of Recreation and Community Sport, Capital University of Physical Education and Sports, Beijing 100091, China;⁵Department of Physical Education, Tsinghua University, Beijing 100084, China;⁶Department of Mathematics and Statistics, Beijing Institute of Technology, Beijing 100081, China）

出处：International Journal of Environmental Research and Public Health 2023

关键词：AQI;older adults;exercise;outdoor

摘要：Background: Exposure to air pollution is associated with an increased risk of all-cause mortality in older adults. Promoting physical activity (PA) an ...

作者：Vediyappan Govindan¹;Samad Noeiaghdam²;Unai Fernandez-Gamiz³;Sagar Ningonda Sankeshwari⁴;R. Arulprakasam⁵;Bing Zhao Li⁶; （¹Corresponding author.;Department of Mathematics, Dmi St John The Baptist University, Mangochi, Central Africa, Malawi-409;²Industrial Mathematics Laboratory, Baikal School of BRICS, Irkutsk National Research Technical University, Irkutsk, 664074, Russia;Department of Applied Mathematics and Programming, South Ural State University, Lenin prospect 76, Chelyabinsk, 454080, Russia;³Nuclear Engineering and Fluid Mechanics Department, University of the Basque Country UPV/EHU, Nieves Cano 12, Vitoria-Gasteiz 01006, Spain;⁴School of Science, SVKM’s NMIMS Deemed to be University, Navi Mumbai - 410 210, India;⁵Department of Mathematics, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, India;⁶School of Mathematics and Statistics, Beijing Institute of Technology, Beijing, China）

出处：Scientific African 2022

关键词：26D10;34A40;34K20;39A30;39B82;44A10

摘要：In this paper, we establish the Shehu transform expression for homogeneous and non-homogeneous linear differential equations. With the help of this ne ...

作者：Hui Zhao;Bing-Zhao Li （¹School of Mathematics and Statistics, Beijing Institute of Technology, Beijing 100081, China）

出处：Fractal and Fractional 2023

关键词：Fourier transform;fractional Fourier transform;unlimited sampling theorem;nonlinear modulus mapping

摘要：The recovery of bandlimited signals with high dynamic range is a hot issue in sampling research. The unlimited sampling theory expands the recordable ...

作者：Fang-Jia Yan;Bing-Zhao Li （¹School of Mathematics and Statistics, Beijing Institute of Technology, Beijing 100081, China;²Beijing Key Laboratory on MCAACI, Beijing Institute of Technology, Beijing 100081, China）

出处：Signal Processing 2023

关键词：Graph signal processing;Graph Fourier transform;Fractional Fourier transform;Graph Laplacian;Directed graph

摘要：In graph signal processing, the underlying network in many studies is assumed to be undirected. Although the directed graph model is rarely adopted, i ...