检索结果-内蒙古大学图书馆

arXiv 2024年

作者： Restrepo, David Wu, Chenwei Vásquez-Venegas, Constanza Matos, João Gallifant, Jack Celi, Leo Anthony Bitterman, Danielle S. Nakayama, Luis Filipe Laboratory for Computational Physiology Massachusetts Institute of Technology CambridgeMA United States Departamento de Telematica Universidad del Cauca Cauca Popayán Colombia Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI United States Scientific Image Analysis Lab Faculty of Medicine Universidad de Chile RM Santiago Chile Department of Computer Science Faculty of Engineering Universidad de Concepción Biobio Concepción Chile Department of Biostatistics Harvard TH Chan School of Public Health BostonMA United States Department of Medicine Beth Israel Deaconess Medical Center BostonMA United States Artificial Intelligence in Medicine Program Mass General Brigham Harvard Medical School BostonMA United States Department of Ophthalmology São Paulo Federal University São Paulo São Paulo Brazil

The deployment of large language models (LLMs) in healthcare has demonstrated substantial potential for enhancing clinical decision-making, administrative efficiency, and patient outcomes. However, the underrepresentation of diverse groups in the development and application of these models can perpetuate biases, leading to inequitable healthcare delivery. This paper presents a comprehensive scientometric analysis of LLM research for healthcare, including data from January 1, 2021, to July 1, 2024. By analyzing metadata from PubMed and Dimensions, including author affiliations, countries, and funding sources, we assess the diversity of contributors to LLM research. Our findings highlight significant gender and geographic disparities, with a predominance of male authors and contributions primarily from high-income countries (HICs). We introduce a novel journal diversity index based on Gini diversity to measure the inclusiveness of scientific publications. Our results underscore the necessity for greater representation in order to ensure the equitable application of LLMs in healthcare. We propose actionable strategies to enhance diversity and inclusivity in artificial intelligence research, with the ultimate goal of fostering a more inclusive and equitable future in healthcare innovation. © 2024, CC BY.

关键词： Decision making

来源：评论

学校读者我要写书评

暂无评论

Numerical treatment based on artificial neural network to Soret and Dufour effects on MHD squeezing flow of Jeffrey fluid in horizontal channel with thermal radiation

引用

International Journal of Thermofluids 2024年 23卷

作者： Ullah, Hakeem Alqahtani, Aisha M. Raja, Muhammad Asif Zahoor Fiza, Mehreen Ullah, Kashif Omer, Abdoalrahman S.A. Khan, Ilyas Shoaib, Muhmmad Department of Mathematics Abdul Wali Khan University KP Mardan23200 Pakistan Department of Mathematical Science Princess Nourah bint Abdulrahman University P.O. Box 84428 Riyadh11671 Saudi Arabia Future Technology Research Center National Yunlin University of Science and Technology 123 University Road Section.3Yunlin Douliou64002 Taiwan Department of Mathematics College of Education Al Fashir University Sudan Department of Information System College of Computer and Information Sciences Majmaah University Al-Majmaah 11952 Saudi Arabia Department of Mathematics College of Science Al-Zulfi Majmaah University Al-Majmaah 11952 Saudi Arabia Yuan Ze University AI centre Taoyun320 Taiwan Hourani Center for Applied Scientific Research Al-Ahliyya Amman University Amman Jordan Department of Mathematics Saveetha School of Engineering SIMATS Tamil Nadu Chennai India Al-Ayen research center Al-Ayen University Iraq

The current investigation formulated an efficient computing technique by incorporating the algorithm of Artificial Neural Network Levenberg Marquardt Method (ANNLMM) to approximate Soret and Dufour effects on Magnetohydrodynamic squeezing flow of Jeffrey fluid (MHDSFJF) in MATLAB environment. Due to its efficiency and flexibility, the applied neural network model can accurately predict the output results. In the ANNLMM, 80% of the data is used for training and 10% is set for both the testing and validation processes. The flow under consideration is mathematically formulated with the help of Navier Stokes Equations. The partial differential equations (PDEs) are converted into ordinary differential equations (ODEs) by similarity variables. The effects of the physical parameters are discussed briefly. When the Hartmann number and Jeffrey fluid parameter increase, the concentration, temperature, and velocity profiles decreases. The temperature profile and heat transfer rate are improved by the effects of joule dissipation, Dufour numbers, and heat generation/absorption. On the other hand, as thermal radiation rises, the temperature profile decreases and the heat transfer rate increases. With an augment in Soret number, the mass transfer rate increases and the concentration profile slows down. Additionally, increasing chemical reactions, the mass transfer rate increases, but in convective chemical reactions, the contradiction is observed. © 2024

关键词： Magnetohydrodynamics

来源：评论

学校读者我要写书评

暂无评论

Low-Velocity-Favored Transition Radiation

引用

Physical Review Letters 2023年第11期131卷 113002-113002页

作者： Jialin Chen Ruoxi Chen Fuyang Tay Zheng Gong Hao Hu Yi Yang Xinyan Zhang Chan Wang Ido Kaminer Hongsheng Chen Baile Zhang Xiao Lin Interdisciplinary Center for Quantum Information State Key Laboratory of Extreme Photonics and Instrumentation ZJU-Hangzhou Global Scientific and Technological Innovation Center College of Information Science & Electronic Engineering Zhejiang University Hangzhou 310027 China International Joint Innovation Center the Electromagnetics Academy at Zhejiang University Zhejiang University Haining 314400 China Department of Electrical and Computer Engineering Technion-Israel Institute of Technology Haifa 32000 Israel Department of Electrical and Computer Engineering Rice University Houston Texas 77005 USA Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston Texas 77005 USA School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore Department of Physics University of Hong Kong Hong Kong 999077 China Key Lab of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Jinhua Institute of Zhejiang University Zhejiang University Jinhua 321099 China Shaoxing Institute of Zhejiang University Zhejiang University Shaoxing 312000 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore Centre for Disruptive Photonic Technologies Nanyang Technological University Singapore 637371 Singapore

When a charged particle penetrates through an optical interface, photon emissions emerge—a phenomenon known as transition radiation. Being paramount to fundamental physics, transition radiation has enabled many applications from high-energy particle identification to novel light sources. A rule of thumb in transition radiation is that the radiation intensity generally decreases with the decrease of particle velocity v; as a result, low-energy particles are not favored in practice. Here, we find that there exist situations where transition radiation from particles with extremely low velocities (e.g., v/c<10−3) exhibits comparable intensity as that from high-energy particles (e.g., v/c=0.999), where c is the light speed in free space. The comparable radiation intensity implies an extremely high photon extraction efficiency from low-energy particles, up to 8 orders of magnitude larger than that from high-energy particles. This exotic phenomenon of low-velocity-favored transition radiation originates from the interference of the excited Ferrell-Berreman modes in an ultrathin epsilon-near-zero slab. Our findings may provide a promising route toward the design of integrated light sources based on low-energy electrons and specialized detectors for beyond-standard-model particles.

关键词： Atom or molecule scattering from surfaces Atomic & molecular collisions Cherenkov radiation Crystal optics Electron beams & optics Light-matter interaction Optical sources & detectors Optical transient phenomena Plasmonics

来源：评论

学校读者我要写书评

暂无评论

A DECOUPLING TWO-GRID METHOD FOR THE STEADY-STATE POISSON-NERNST-PLANCK EQUATIONS

引用

Journal of computational Mathematics 2019年第4期37卷 556-578页

作者： Ying Yang Benzhuo Lu Yan Xie School of Mathematics and Computing Science Guangxi Colleges and Universities Key Laboratory of Data Analysis and Computation Guilin University of Electronic Technology Guilin 541004 China LSEC Institute of Computational Mathematics and Scientific/Engineering Computing the National Center for Mathematics and Interdisciplinary Sciences Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China LSEC Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

Poisson-Nernst-Planck equations are widely used to describe the electrodiffusion of ions in a solvated biomolecular system. Two kinds of two-grid finite element algorithms are proposed to decouple the steady-state Poisson-Nernst-Planck equations by coarse grid finite element approximations. Both theoretical analysis and numerical experiments show the efficiency and effectiveness of the two-grid algorithms for solving Poisson-Nernst-Planck equations.

关键词： Poisson-Nernst-Planck equations Two-grid finite element method Decoupling method Error analysis Gummel iteration

来源：评论

学校读者我要写书评

暂无评论

A Systematic Study on Electronic, Mechanical, and Thermal Transport Properties of Germanium Antimony Selenide Telluride Alloy by First-Principles Approach

SSRN

引用

SSRN 2022年

作者： Lian, Xiaojuan Li, Fu Liu, Peng Wan, Xiang Liu, Xiaoyan Ren, Qingying Cai, Zhikuang Wang, Ning Wang, Lei College of Integrated Circuits Science and Engineering Nanjing University of Posts and Telecommunications NO. 9 Wenyuan Road Jiangsu Nanjing210023 China National and Local Joint Engineering Laboratory of RF Integration oand Micro-assembly Technology Nanjing University of Posts and Telecommunications NO. 9 Wenyuan Road Jiangsu Nanjing210023 China Electrical & Electronic Laboratory Center Department of Optical Engineering College of Electronic and Optical Engineering College of Microelectronics Nanjing University of Posts and Telecommunications NO. 9 Wenyuan Road Jiangsu Nanjing210023 China School of Science Key Laboratory of High Performance Scientific Computation Xihua University Chengdu610039 China

Ge2Sb2Se4Te alloy has most recently exhibited its outstanding optical properties for non-volatile photonic storage applications, while its electrical and thermal transport properties were rarely reported, thus limiting its application versatility. To overcome above issue, we performed detailed study on the electrical, mechanical and thermal transport properties of Ge2Sb2Se4Te alloy according to first-principles calculations. The calculated results showed that, originating from the layered crystal structure of Ge2Sb2Se4Te, its Young’s modulus and shear modulus along the in-plane direction were found to be larger than those along the out-of-plane direction, which suggested more superb anti-deformation characteristics along the in-plane direction. Besides, the calculated Poisson's ratio implied that the in-plane bonding of Ge2Sb2Se4Te was mainly ionic-covalent bonding, and the out-of-plane bonding was of van der Waals (vdW) interaction character. The huge chemical bond difference between in-plane direction and out-of-plane direction led to strong phonon anharmonicity and phonon thermal transport anisotropy. Therefore, layered Ge2Sb2Se4Te exhibited low phonon group velocity and short phonon lifetime, which led to encouragingly low lattice thermal conductivities of 4.45 W/mK, 3.54 W/mK and 0.41 W/mK along the x-axis, y-axis and z-axis at 300 K, respectively. Also, calculated electronic structure revealed the metallicity character of Ge2Sb2Se4Te alloy without pronounced band gap, which made this material applicable to thermal insulation materials rather than traditional thermoelectric materials. This work was useful to promote the application of Ge2Sb2Se4Te in the field of engineering thermal management and storage devices based on the optical-thermal mechanism. © 2022, The Authors. All rights reserved.

关键词： Van der Waals forces

来源：评论

学校读者我要写书评

暂无评论

Broadband focusing of acoustic plasmons in graphene with an applied current

arXiv

引用

arXiv 2021年

作者： Sammon, Michael Margetis, Dionisios Mele, E.J. Low, Tony Department of Electrical and Computer Engineering University of Minnesota MinneapolisMN55455 United States Institute for Physical Science and Technology Department of Mathematics Center for Scientific Computation and Mathematical Modeling University of Maryland College ParkMD20742 United States Dept. of Physics and Astronomy University of Pennsylvania PhiladelphiaPA19104 United States

Non-reciprocal plasmons in current-driven, isotropic, and homogenous graphene with proximal metallic gates is theoretically explored. Nearby metallic gates screen the Coulomb interactions, leading to linearly dispersive acoustic plasmons residing close to its particle-hole continuum counterpart. We show that the applied bias leads to spectral broadband focused plasmons whose resonance linewidth is dependent on the angular direction relative to the current flow due to Landau damping. We predict that forward focused non-reciprocal plasmons are possible with accessible experimental parameters and setup. © 2021, CC BY.

关键词： Plasmons

来源：评论

学校读者我要写书评

暂无评论

Maximizing Network Coverage Under the Presence of Time Constraint by Injecting Most Effective k-Links 23rd

Maximizing Network Coverage Under the Presence of Time Const...

引用

23rd International Conference on Discovery science, DS 2020

作者： Ohara, Kouzou Fushimi, Takayasu Saito, Kazumi Kimura, Masahiro Motoda, Hiroshi College of Science and Engineering Aoyama Gakuin University Sagamihara Japan School of Computer Science Tokyo University of Technology Hachioji Japan Faculty of Science Kanagawa University Hiratsuka Japan Center for Advanced Intelligence Project RIKEN Tokyo Japan Faculty of Advanced Science and Technology Ryukoku University Otsu Japan Institute of Scientific and Industrial Research Osaka University Suita Japan

ISBN: (纸本)9783030615260

We focus on a class of link injection problem of spatial network, i.e., finding best places to construct k new roads that save as many people as possible in a time-critical emergency situation. We quantify the network performance by node coverage under the presence of time constraint and propose an efficient algorithm that maximizes the marginal gain by use of lazy evaluation making the best of time constraint. We apply our algorithm to three problem scenarios (disaster evacuation, ambulance call, fire engine dispatch) using real-world road network and geographical information of actual facilities and demonstrate that 1) use of lazy evaluation can achieve nearly two orders of magnitude reduction of computation time compared with the straightforward approach and 2) the location of new roads is intuitively explainable and reasonable. © 2020, Springer Nature Switzerland AG.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Efficient reinforcement learning in continuous state and action spaces with Dyna and policy approximation

引用

Frontiers of computer science 2019年第1期13卷 106-126页

作者： Shan ZHONG Quan LIU Zongzhang ZHANG Qiming FU School of Computer Science and Technology Soochow UniversitySuzhou 215000China School of Computer Science and Engineering Changshu Institute of TechnologyChangshu 215500China Jiangsu Province Key Laboratory of Intelligent Building Energy Efficiency Suzhou University of Science and TechnologySuzhou 215006China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012China Collaborative Innovation Center of Novel Software Technology and Industrialization Nanjing 210000China College of Electronic &Information Engineering Suzhou University of Science and TechnologySuzhou 215000China

Dyna is an effective reinforcement learning (RL) approach that combines value function evaluation with model ***,existing works on Dyna mostly discuss only its efficiency in RL problems with discrete action *** paper proposes a novel Dyna variant,called Dyna-LSTD-PA,aiming to handle problems with continuous action ***-LSTD-PA stands for Dyna based on least-squares temporal difference (LSTD)and policy ***-LSTD-PA consists of two simultaneous,interacting *** learning process determines the probability distribution over action spaces using the Gaussian distribution;estimates the underlying value function,policy,and model by linear representation;and updates their parameter vectors online by LSTD(,t).The planning process updates the parameter vector of the value function again by using ofttine LSTD(2).Dyna-LSTD-PA also uses the Sherman-Morrison formula to improve the efficiency of LSTD(,t),and weights the parameter vector of the value function to bring the two processes ***,the global error bound is derived by considering approximation,estimation,and model ***,Dyna-LSTD-PA outperforms two representative methods in terms of convergence rate,success rate,and stability performance on four benchmark RL problems.

关键词： problem solving control methods heuristic search methods dynamic programming

来源：评论

学校读者我要写书评

暂无评论

Blackhole-Inspired Thermal Trapping with Graded Heat-Conduction Metadevices

arXiv

引用

arXiv 2022年

作者： Xu, Liujun Liu, Jinrong Jin, Peng Xu, Guoqiang Li, Jiaxin Ouyang, Xiaoping Li, Ying Qiu, Cheng-Wei Huang, Jiping Fudan University Shanghai200438 China Department of Electrical and Computer Engineering National University of Singapore Singapore117583 Singapore Graduate School of China Academy of Engineering Physics Beijing100193 China School of Mechatronics Engineering Harbin Institute of Technology Harbin150001 China School of Materials Science and Engineering Xiangtan University Xiangtan411105 China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou310027 China International Joint Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang The Electromagnetics Academy of Zhejiang University Zhejiang University Haining314400 China

Black holes are one of the most intriguing predictions of general relativity. So far, metadevices have enabled analogous black holes to trap light or sound in laboratory spacetime. However, trapping heat in a conductive ambient is still challenging because diffusive behaviors are directionless. Inspired by black holes, we construct graded heat-conduction metadevices to achieve thermal trapping, resorting to the imitated advection produced by graded thermal conductivities rather than the trivial solution of using insulation materials to confine thermal diffusion. We experimentally demonstrate thermal trapping for guiding hot spots to diffuse towards the center. Graded heat-conduction metadevices have advantages in energy-efficient thermal regulation because the imitated advection has a similar temperature field effect to the realistic advection that is usually driven by external energy sources. These results also provide insights into correlating transformation thermotics with other disciplines such as cosmology for emerging heat control schemes. Copyright © 2022, The Authors. All rights reserved.

关键词： Advection

来源：评论

学校读者我要写书评

暂无评论

Sparse dual-graph regularized quadratic dimensionality reduction algorithm based on subspace learning

引用

Digital Signal Processing: A Review Journal 2025年 164卷

作者： Ma, Ziping Huang, Yulei Ma, Jinlin Li, Huirong School of Mathematics and Information Science North Minzu University Yinchuan750030 China School of Mathematics and Statistics Ningxia University Yinchuan750030 China School of Computer Science and Engineering North Minzu University Yinchuan750030 China School of Mathematics and Computer Application Shangluo University Shangluo726000 China Ningxia Collaborative Innovation Center for Scientific Computing and Intelligent Information Processing North Minzu University Yinchuan750030 China

Nonnegative matrix factorization (NMF) has been attracting more and more attention due to its significant performance in dimensionality reduction. NMF performs dimensionality reduction by mapping high-dimensional data into low-dimensional space, which might lead to the uncontrollability, i.e. quantity and quality, of dimensions in dimensionality reduction. To address this issue, we innovatively propose a novel sparse dual-graph regularized quadratic dimensionality reduction (SDQDR) algorithm by embedding feature selection mechanism to semi-supervised NMF, which are fused as a whole rather than the simple combinations of NMF and feature selection in existing methods. The proposed SDQDR not only inherits the advantages of semi-supervised NMF but also demonstrates some special and important properties, such as controllability of dimensionality reduction, higher clustering performance, and significant dimensionality reduction with low time cost, etc. Then, to reinforce the sparsity structure and retain the manifold structures of both the data and the feature space simultaneously, 1-2,1/2 sparse constraint and dual graph regularization are incorporated into the proposed framework. Finally, the objective function, convergence proof, and iterative update rules are presented. In comparison with 15 state-of-the-art algorithms, relevant results demonstrate the proposed method is competitive, especially in terms of the efficiency of dimensionality reduction. © 2025 Elsevier Inc.

关键词： Non-negative matrix factorization

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：