检索结果-内蒙古大学图书馆

Annual Conference on Information Sciences and Systems (CISS)

作者： Eun Jee Lee Sudeep Kamath Emmanuel Abbe Sanjeev R. Kulkarni Program in Applied and Computational Mathematics Department of Electrical Engineering Princeton University

This paper studies independent cascade models where influence propagates from seed-nodes along edges with independent probabilities. Upper-bounds for the expected number of influenced nodes were previously proposed using the spectral norm of a Hazard matrix. However, these bounds turn out loose in many cases, in particular with respect to sensitive edges such as bottlenecks, seed adjacent, and high probability edges. This paper proposes a similar bound that improves in such cases by handling sensitives edges more carefully.

关键词： Hazards Upper bound Stochastic processes Information science Merging computational modeling Mathematical model

来源：评论

学校读者我要写书评

暂无评论

Mesoscopic model for microscale hydrodynamics and interfacial phenomena: Slip, films, and contact-angle hysteresis

引用

Physical Review E 2013年第1期87卷 013302-013302页

作者： Carlos E. Colosqui Michail E. Kavousanakis Athanasios G. Papathanasiou Ioannis G. Kevrekidis Department of Chemical and Biological Engineering and Program in Applied and Computational Mathematics Princeton University Princeton New Jersey 08544 USA

We present a model based on the lattice Boltzmann equation that is suitable for the simulation of dynamic wetting. The model is capable of exhibiting fundamental interfacial phenomena such as weak adsorption of fluid on the solid substrate and the presence of a thin surface film within which a disjoining pressure acts. Dynamics in this surface film, tightly coupled with hydrodynamics in the fluid bulk, determine macroscopic properties of primary interest: the hydrodynamic slip; the equilibrium contact angle; and the static and dynamic hysteresis of the contact angles. The pseudo-potentials employed for fluid-solid interactions are composed of a repulsive core and an attractive tail that can be independently adjusted. This enables effective modification of the functional form of the disjoining pressure so that one can vary the static and dynamic hysteresis on surfaces that exhibit the same equilibrium contact angle. The modeled fluid-solid interface is diffuse, represented by a wall probability function that ultimately controls the momentum exchange between solid and fluid phases. This approach allows us to effectively vary the slip length for a given wettability (i.e., a given static contact angle) of the solid substrate.

关键词： HYDRODYNAMICS INTERFACES (Physical sciences) THIN films HYSTERESIS MATHEMATICAL models LATTICE Boltzmann methods DYNAMICAL systems WETTING

来源：评论

学校读者我要写书评

暂无评论

Study on the measurement of the deformation of solid material in infrared radiation imaging

Study on the measurement of the deformation of solid materia...

引用

International Conference on Electronics and Optoelectronics

作者： Cheng, Tao Teng, Ai-Ping Wang, Fang Zhang, Guang-Cai Zhang, Yong-Jun State Key Laboratory for Geo-Mechanics and Deep Underground Engineering China University of Mining and Technology Beijing China Beijing China Institute of Applied Physics and Computational Mathematics China Academy of Engineering Physics Beijing China Department of Mathematics-Physics Qingdao Technological University Shandong China

ISBN: (纸本)9781612842738

Based on the thermodynamics and plastoelasticity, mechanics of the infrared radiation of solid material was investigated and theoretical explanation was given. The constitutive relation between temperature and principal strains was obtained. According to the theory we simulated the infrared radiation temperature field of the solid material subjected to external loading. Calculation results were in good agreement with experimental results, which verifying the validity of the theory and the feasibility of the measurement of deformation using infrared radiation imaging. © 2011 IEEE.

关键词： Temperature

来源：评论

学校读者我要写书评

暂无评论

Radiation and gyrotactic microorganisms in Walter-B nanofluid flow over a stretching sheet

引用

Journal of Radiation Research and applied Sciences 2025年第3期18卷

作者： Muhammad Shaheen Hakeem Ullah Mehreen Fiza Aasim Ullah Jan Ali Akgül A.S. Hendy Samira Elaissi Ilyas Khan Mohsen Bakhori N.F.M. Noor Department of Mathematics Abdul Wali Khan University Mardan 23200 Khyber Pakhtunkhwa Pakistan Department of Mathematics and Statistics Bacha Khan University Charsadda Khyber Pakhtunkhwa Pakistan Department of Electronics and Communication Engineering Saveetha School of Engineering SIMATS Chennai Tamilnadu India Siirt University Art and Science Faculty Department of Mathematics 56100 Siirt Turkey Applied Science Research Center Applied Science Private University Amman 11937 Jordan Department of Computational Mathematics and Computer Science Institute of Natural Sciences and Mathematics Ural Federal University 19 Mira St. Yekaterinburg 620002 Russia Department of Mechanics and Mathematics Western Caspian University Baku 1001 Azerbaijan Department of Physics College of Sciences Princes Nourah Bint Abdulrahman University P.O. Box 84428 Riyadh 11671 Saudi Arabia Department of Mathematics College of Science Al-Zulfi Majmaah University Al-Majmaah 11952 Saudi Arabia Department of Medical Equipment Technology College of Applied Medical Science Majmaah University Majmaah 11952 Saudi Arabia Institute of Mathematical Sciences Faculty of Science Universiti Malaya 50603 Kuala Lumpur Malaysia

The present study investigates the flow characteristics of both homogeneous and heterogeneous Walter-B nanofluids induced by a stretching sheet. Special attention is given to the effects of melting and magnetic fields on the flow behavior. The distribution of motile microorganisms is modeled using a microbial conservation equation, incorporating key parameters such as the Lewis number, Peclet number, and the microorganism difference parameter. The influence of thermal radiation and the heterogeneous reaction parameter is also considered. To facilitate the analysis, the governing partial differential equations are transformed into a set of ordinary differential equations using similarity transformations. A convergent series solution is then obtained through the application of the Homotopy Analysis Method (HAM). The study further explores the effects of various physical parameters, including the Prandtl number, magnetic field intensity, radiation, thermophoresis, Brownian motion, bioconvection, Peclet number, and the microorganism difference parameter. Results indicate that the velocity field decreases with an increase in the magnetic parameter, while the temperature profile diminishes with higher values of the radiation parameter. Furthermore, the concentration of microorganisms is observed to decline with increasing Lewis number.

关键词： Walter-B Homogeneous and heterogeneous reaction Radiation Bioconvection Melting phenomena

来源：评论

学校读者我要写书评

暂无评论

The attractor of the stochastic generalized Ginzburg-Landau equation

引用

Science China mathematics 2008年第5期51卷 955-964页

作者： GUO BoLing~1 WANG GuoLian~(2+) Li DongLong~3 1 Institute of applied physics and computational mathematics,P.O.Box 8009,Beijing 100088,China 2 The Graduate School of China Academy of Engineering physics,P.O.Box 2101,Beijing 100088,China 3 department of Information and Computer Science,Guangxi University of Technology,Liuzhou 545006,China Institute of Applied Physics Computational Mathematics P. O. Box 8009 Beijing 100088 China The Graduate School of China Academy of Engineering Physics P. O. Box 2101 Beijing 100088 China Department of Information Computer Science Guangxi University of Technology Liuzhou 545006 China

The stochastic generalized Ginzburg-Landau equation with additive noise can be solved pathwise and the unique solution generates a random system. Then we prove the random system possesses a global random attractor in ... 详细信息

关键词： generalized Ginzburg-Landau equation random dynamical systems random attractor 35K05

来源：评论

学校读者我要写书评

暂无评论

Enhanced Correlation of Electron-Positron Pair in Two and Three Dimensions

引用

Chinese physics Letters 2014年第1期31卷 48-51页

作者：唐琐谢柏松王虹宇刘杰傅立斌郁明阳 Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education College of Nuclear Science and Technology Beijing Normal University Beijing 100875 Department of Physics Anshan Normal University Anshan 114005 Institute of Applied Physics and Computational Mathematics P. O. Box 8009 Beijing 100088 Institute for Fusion Theory and Simulation Department of Physics Zhejiang University Hangzhou 310027 Institut fur Theoretische Physik I Ruhr-Universigt Bochum D-44780 Bochum Germany

Early time electron-positron correlation in vacuum pair-production in an external field is investigated. The entangled electron and positron wave functions are obtained analytically in the configuration and momentum spaces. It is shown that, relative to that of the one-dimensional theory, two- and three-dimensional calculations yield enhanced spatial correlation and broadened momentum spectra. In fact, at early times the electron and positron almost coincide spatially. The correlation also depends on the direction of the applied field. For the spatial correlation, the transverse correlation is stronger than the longitudinal correlation.

关键词： ELECTRON-positron interactions POSITRONS WAVE functions MOMENTUM space SHEAR waves

来源：评论

学校读者我要写书评

暂无评论

Nucleation-Initiated Solidification of Thin Si Films

引用

MRS Online Proceedings Library 2011年第1期979卷 1-6页

作者： S. Hazair P. C. van der Wilt Y. Deng U. J. Chung A. B. Limanov James S. Im Program of Materials Science Department of Applied Physics and Applied Mathematics Columbia University New York USA

Thin Si films on SiO2 that are completely melted by pulsed laser irradiation cool rapidly and eventually solidify via nucleation and growth of solids. It has been observed that a variety of solidified microstructures can be obtained, depending primarily (but not exclusively) on the degree of supercooling achieved prior to the onset of nucleation. This paper focuses on investigating one particular and unusual polycrystalline microstructure that consists of “flowerlike” grains, the interiors of which can be described as being made up of two distinct regions: (1) an extremely defective core region consisting of fine-grained material, and (2) an outer region consisting of relatively defect-free crystal “petals” that radiate outwards. After considering the microstructural details and experimental behavior of the microstructure, we have formulated a growth-based physical model to account for the formation of the microstructure. The model is found to be also capable of accounting for other complex and unusual microstructures obtained via nucleation and growth in the complete melting regime.

关键词： Si nucleation & growth thin film

来源：评论

学校读者我要写书评

暂无评论

ABACUS: An Electronic Structure Analysis Package for the AI Era

arXiv

引用

arXiv 2025年

作者： Zhou, Weiqing Zheng, Daye Liu, Qianrui Lu, Denghui Liu, Yu Lin, Peize Huang, Yike Peng, Xingliang Bao, Jie J. Cai, Chun Jin, Zuxin Wu, Jing Zhang, Haochong Jin, Gan Ji, Yuyang Shen, Zhenxiong Liu, Xiaohui Sun, Liang Cao, Yu Sun, Menglin Liu, Jianchuan Chen, Tao Liu, Renxi Li, Yuanbo Han, Haozhi Liang, Xinyuan Bao, Taoni Chen, Nuo Ren, Hongxu Zhang, Xiaoyang Liu, Zhaoqing Fu, Yiwei Liu, Maochang Li, Zhuoyuan Wen, Tongqi Tang, Zechen Xu, Yong Duan, Wenhui Wang, Xiaoyang Gu, Qiangqiang Dai, Fu-Zhi Zheng, Qijing Zhao, Jin Zhang, Yuzhi Ou, Qi Jiang, Hong Liu, Shi Xu, Ben Xu, Shenzhen Ren, Xinguo He, Lixin Zhang, Linfeng Chen, Mohan AI for Science Institute Beijing100080 China HEDPS CAPT School of Physics College of Engineering Peking University Beijing100871 China College of Engineering Peking University Beijing100871 China Institute of Artificial Intelligence Hefei Comprehensive National Science Center Hefei230026 China Key Laboratory of Quantum Information University of Science and Technology of China Hefei230026 China Supercomputing Center University of Science and Technology of China Anhui Hefei230026 China Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Materials Science and Engineering Peking University Beijing100871 China School of Electrical Engineering and Electronic Information Xihua University Chengdu610039 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China College of Chemistry and Molecular Engineering Peking University Beijing100871 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow Xi’an Jiaotong University Shaanxi Xi’an710049 China Suzhou Academy of Xi’an Jiaotong University Jiangsu Suzhou215123 China Center for Structural Materials Department of Mechanical Engineering The University of Hong Kong Hong Kong The University of Hong Kong Shenzhen China State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China Frontier Science Center for Quantum Information Beijing China Saitama Wako351-0198 Japan Institute for Advanced Study Tsinghua University Beijing100084 China Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Fenghao East Road 2 Beijing100094 China School of Artificial Intelligence and Data Science University of Science and Technology of China Hefei230026 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China Department of Physics University of Science and

ABACUS (Atomic-orbital Based Ab-initio Computation at USTC) is an open-source software for first-principles electronic structure calculations and molecular dynamics simulations. It mainly features density functional theory (DFT) and is compatible with both plane-wave basis sets and numerical atomic orbital basis sets. ABACUS serves as a platform that facilitates the integration of various electronic structure methods, such as Kohn-Sham DFT, stochastic DFT, orbital-free DFT, and real-time time-dependent DFT, etc. In addition, with the aid of high-performance computing, ABACUS is designed to perform efficiently and provide massive amounts of first-principles data for generating general-purpose machine learning potentials, such as DPA models. Furthermore, ABACUS serves as an electronic structure platform that interfaces with several AI-assisted algorithms and packages, such as DeePKS-kit, DeePMD, DP-GEN, DeepH, DeePTB, etc. Copyright © 2025, The Authors. All rights reserved.

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

Earthmover-based manifold learning for analyzing molecular conformation spaces

arXiv

引用

arXiv 2019年

作者： Zelesko, Nathan Moscovich, Amit Kileel, Joe Singer, Amit Department of Mathematics Brown University Program in Applied and Computational Mathematics Princeton University Department of Mathematics Princeton University

In this paper, we propose a novel approach for manifold learning that combines the Earthmover's distance (EMD) with the diffusion maps method for dimensionality reduction. We demonstrate the potential benefits of this approach for learning shape spaces of proteins and other flexible macromolecules using a simulated dataset of 3-D density maps that mimic the non-uniform rotary motion of ATP synthase. Our results show that EMD-based diffusion maps require far fewer samples to recover the intrinsic geometry than the standard diffusion maps algorithm that is based on the Euclidean distance. To reduce the computational burden of calculating the EMD for all volume pairs, we employ a wavelet-based approximation to the EMD which reduces the computation of the pairwise EMDs to a computation of pairwise weighted-`1 distances between wavelet coefficient vectors. Copyright © 2019, The Authors. All rights reserved.

关键词： Electron microscopes

来源：评论

学校读者我要写书评

暂无评论

Two dimensional nodal Riemann solver based on one dimensional Riemann solver for a cell-centered Lagrangian scheme

Two dimensional nodal Riemann solver based on one dimensiona...

引用

第十七届全国流体力学数值方法研讨会

作者： Yan Liu De-kang Mao Baolin Tian Weidong Shen Key Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Beijing China Department of Mathematics Shanghai University Shanghai China

We develop a new and more general formula for the construction of two dimensional nodal Riemann solver for a cell-centered Lagrangian scheme[1-2] developed by Make and his co-workers which allows us to use general one dimensional Riemann solvers that have intermediate velocity and pressure in the *** old formula for the scheme used in the papers of Maire et al is only a special case of our new *** present an entropy discussion, which indicates that the schemes with nodal solvers constructed following the old formula, which can only use the 1D Riemann solvers satisfying our strong entropy condition, are usually numerically very dissipative.

关键词：

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：