检索结果-内蒙古大学图书馆

International Symposium on Multimedia Software Engineering

作者： Chin-Shyurng Fahn Hung-Kuang Chen Yi-Haur Shiau Department of Computer Science and Information Engineering National Taiwan University of Science and Technology Taiwan Department of Electronic Engineering National Taiwan University of Science and Technology Taiwan Software and Development Division National Center of High-Performance Computing Taiwan

ISBN: (纸本)0769518575

In applications such as scientific and medical visualization, highly detailed polygonal meshes are needed. Rendering these polygonal meshes usually exceeds the capabilities of graphics hardware. To improve rendering efficiency and maintain proper interactivity, the polygonal mesh simplification technique is commonly used to reduce the number of polygons of the mesh and construct a multiresolution representation. We propose a new and simple constraint scheme based on the quadric error metric proposed by Garland and Heckbert (1997, 1998) to preserve face colors and boundary edges during the simplification process. In addition, our method generates progressive meshes that store the polygonal mesh in a continuous multi-resolution representation. According to our experimental results, this new method is successful in preserving face colors and boundary edges. Moreover, we compare the latency of resolution changes for progressive meshes of various models.

关键词： Computer errors Frequency Error correction Computer science Reactive power Mesh generation Data visualization Sampling methods Topology Geometry

来源：评论

学校读者我要写书评

暂无评论

Robust and Quality Boundary Constrained Tetrahedral Mesh Generation

引用

Communications in Computational Physics 2013年第10期14卷 1304-1321页

作者： Songhe Song Min Wan Shengxi Wang Desheng Wang Zhengping Zou Department of Mathematics and Systems Science State Key Laboratory of High Performance ComputingNationalUniversity ofDefense TechnologyChangsha 410073P.R.China State Key Laboratory of Aerodynamics China Aerodynamics and Development CenterMianyang 621000P.R.China Division of Mathematical Sciences School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371 Taiyuan Satellite Launch Center 030027P.R.China National Key Laboratory of Science and Technology on Aero-EngineAero-Thermodynamics School of Jet PropulsionBeijing University of Aeronautics and AstronauticsBeijing 100191P.R.China

A novel method for boundary constrained tetrahedral mesh generation is proposed based on Advancing Front Technique(AFT)and conforming Delaunay *** a triangulated surface mesh,AFT is firstly applied to mesh several layers of elements adjacent to the *** rest of the domain is then meshed by the conforming Delaunay *** non-conformal interface between two parts of meshes are *** refinement and mesh optimization are then preformed to obtain a more reasonable-sized mesh with better *** and quality of the proposed method is *** proof of each stage as well as the whole algorithm is *** numerical examples are included as well as the quality of the meshes.

关键词： Unstructured tetrahedral mesh Advancing Front Technique conforming Delaunay triangulation boundary constrained mesh refinement mesh optimization

来源：评论

学校读者我要写书评

暂无评论

Lane marking detection algorithm based on high-precision map and multisensor fusion

Lane marking detection algorithm based on high-precision map...

引用

作者： Yao, Haichang Chen, Chen Liu, Shangdong Li, Kui Ji, Yimu Huang, Guangyan Wang, Ruchuan School of Computer Science Nanjing University of Posts and Telecommunications Nanjing China School of Computer and Software Nanjing Institute of Industry Technology Nanjing China Industrial Software Engineering Technology Research and Development Center of Jiangsu Education Department Nanjing Institute of Industry Technology Nanjing China Jiangsu HPC and Intelligent Processing Engineer Research Center Nanjing China Institute of High Performance Computing and Bigdata Nanjing University of Posts and Telecommunications Nanjing China School of Information Technology Deakin University Melbourne Australia

In case of sharp road illumination changes, bad weather such as rain, snow or fog, wear or missing of the lane marking, the reflective water stain on the road surface, the shadow obstruction of the tree, and mixed lane markings and other signs, missing detection or wrong detection will occur for the traditional lane marking detection algorithm. In this manuscript, a lane marking detection algorithm based on high-precision map and multisensor fusion is proposed. The basic principle of the algorithm is to use the centimeter-level high-precision positioning combined with high-precision map data to complete the detection of lane markings. In the process of generating high-precision maps or in the uncovered areas of high-precision maps, LIDAR (LIght Detection And Ranging) is used to estimate the curvature of the road to assist in lane marking detection. The experimental results show that the algorithm has lower false detection rate in case of bad road conditions, and the algorithm is robust. © 2020 John Wiley & Sons, Ltd.

关键词： Roads and streets

来源：评论

学校读者我要写书评

暂无评论

highly Efficient Midinfrared On-Chip Electrical Generation of Graphene Plasmons by Inelastic Electron Tunneling Excitation

引用

Physical Review Applied 2015年第5期3卷 054001-054001页

作者： Kelvin J. A. Ooi H. S. Chu C. Y. Hsieh Dawn T. H. Tan L. K. Ang Engineering Product Development Singapore University of Technology and Design East Coast Campus 8 Somapah Road Singapore 487372 Singapore Electronics & Photonics Department A*STAR Institute of High Performance Computing 1 Fusionopolis Way #16-16 Connexis Singapore 138632 Singapore Department of Chemistry Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA

Inelastic electron tunneling provides a low-energy pathway for the excitation of surface plasmons and light emission. We theoretically investigate tunnel junctions based on metals and graphene. We show that graphene is potentially a highly efficient material for tunneling excitation of plasmons because of its narrow plasmon linewidths, strong emission, and large tunability in the midinfrared wavelength regime. Compared to gold and silver, the enhancement can be up to 10 times for similar wavelengths and up to 5 orders at their respective plasmon operating wavelengths. Tunneling excitation of graphene plasmons promises an efficient technology for on-chip electrical generation and manipulation of plasmons for graphene-based optoelectronics and nanophotonic integrated circuits.

关键词： Graphene

来源：评论

学校读者我要写书评

暂无评论

Externally-contracted multi-reference configuration interaction method using a DMRG reference wave function

arXiv

引用

arXiv 2018年

作者： Luo, Zhen Ma, Yingjin Wang, Xicun Ma, Haibo School of Chemistry and Chemical Engineering Nanjing University Nanjing210023 China Department of High Performance Computing Technology and Application Development Computer Network Information Center Chinese Academy of Sciences Beijing100190 China Center of Scientific Computing Applications & Research Chinese Academy of Sciences Beijing100190 China Nanjing Foreign Language School Nanjing210008 China

The recent development of the density matrix renormalization group (DMRG) method in multireference quantum chemistry makes it practical to evaluate static correlation in a large active space, while dynamic correlation provides a critical correction to the DMRG reference for strong-correlated systems and is usually obtained using multi-reference perturbation (MRPT) or configuration interaction (MRCI) methods with internal contraction (ic) approximation. These methods can use active space scalable to relatively larger size references than has previously been possible. However, they are still hardly applicable to systems with active space larger than 30 orbitals and/or large basis set because of high computation and storage costs of high-order reduced density matrices (RDMs) and the crucial dependence of the MRCI Hamiltonian dimension on the number of virtual orbitals. In this work, we propose a new effective implementation of DMRG-MRCI, in which we use re-constructed CASCI-type configurations from DMRG wave function via the entropy-driving genetic algorithm (EDGA) [Luo et. al., J. Chem. Theory Comput., 2017, 13, 4699-4710.], and integrate it with MRCI by an external contraction (ec) scheme. This bypasses the bottleneck of computing high-order RDMs in traditional DMRG dynamic correlation methods with ic approximation and the number of MRCI configurations is not dependent on the number of virtual orbitals. Therefore, DMRG-ec-MRCI method is promising for dealing with larger active space than 30 orbitals and large basis sets. We demonstrate the capability of our DMRG-ec-MRCI method in several benchmark applications, including the evaluation of potential energy curve of Cr2, single-triplet gaps of higher n-acene molecules and the energy of Eu-BTBP(NO3)3 complex. Copyright © 2018, The Authors. All rights reserved.

关键词： Quantum chemistry

来源：评论

学校读者我要写书评

暂无评论

Remaining Useful Life Estimation for Lithium-Ion Batteries using Physics-Informed Neural Networks

Remaining Useful Life Estimation for Lithium-Ion Batteries u...

引用

International Conference on Prognostics and Health Management, PHM

作者： Karkulali Pugalenthi Hyunseok Park Shaista Hussain Nagarajan Raghavan Singapore Institute of Manufacuting Technology Agency for Science Technology and Research Singapore Department of Information Systems Hanyang University Seoul Agency for Science Technology and Research Institute of High-Performance Computing (IHPC) Singapore Engineering Product Development Pillar Singapore University of Technology and Design Singapore

ISBN: (数字)9798350374476

ISBN: (纸本)9798350374483

Lithium-ion batteries (LiB) are commonly used sources of power for autonomous vehicles, unmanned aerial vehicles etc. and hence prognostic studies on LiBs are of utmost importance to ensure safety and reliability. Model-based and Data-driven methods are the commonly used prognostic methods in literature, however these methods are severely limited by model and data uncertainties. Hence, we propose a physics-informed hybrid prognostic approach which leverages on the strengths of the conventional model-based and data-driven methods and addresses its limitations to improve the prognostic performance. This work is an extension of one of our earlier works which combined the data-driven neural network model with the model-based particle filter algorithm. The particle filter algorithm was used to train the neural network model and hence helped overcome the dependency on accurate physics-based/empirical degradation model as well as large amount of historical failure data representing the system’s degradation phenomenon. However, the model parameter values go astray after a few iterations which leads to unrealistic and illogical prediction traces. To address the outlier issues, we propose to integrate a physics-based loss function into the neural network model based on SEI film formation in this work and the method was tested on both NASA and CALCE datasets.

关键词： Degradation Lithium-ion batteries Uncertainty Neural networks NASA Training data Mathematical models

来源：评论

学校读者我要写书评

暂无评论

3D shape analysis for liver-gallbladder anatomical structure retrieval

3D shape analysis for liver-gallbladder anatomical structure...

引用

4th International Workshop on Computational and Clinical applications in Abdominal Imaging, Held in Conjunction with the 15th International Conference on Medical Image computing and Computer-Assisted Intervention, MICCAI 2012

作者： Huang, Weimin Xiong, Wei Zhou, Jiayin Zhang, Jing Yang, Tao Liu, Jiang Su, Yi Lim, Calvin Chui, Chee Kong Chang, Stephen Institute for Infocomm Research Agency for Science Technology and Research #21-01 Connexis South Tower 1 Fusionopolis Way Singapore 138632 Singapore Institute of High Performance Computing Agency for Science Technology and Research #16-16 Connexis North Tower 1 Fusionopolis Way Singapore 138632 Singapore Department of Mechanical Engineering National University of Singapore Centre for Biomedical Materials Application and Technology 9 Engineering Drive 1 Singapore 117576 Singapore Department of Surgery National University Hospital 1E Kent Ridge Road Singapore 119228 Singapore Department of Medical Information Engineering School of Electrical Engineering and Information Sichuan University China

ISBN: (纸本)9783642336119

Anatomical structure is important for medical education and disease diagnosis. In the application of surgical simulation, different anatomical structures can be retrieved to create variety of surgical scenarios for training, while similar structures can also be retrieved to assist disease diagnosis. This paper presents an approach to liver-gallbladder anatomical structure retrieval with 3D shape comparison, where the direct shape comparison based on dense shape registration is applied to liver shape due to its shape complexity, and feature based comparison is applied to gallbladder shape with a semantic shape decomposition using the saliency area based on multi-scale curvatures and concavity. After the registration of liver models, the geometric structure of the gallbladder and liver can be combined for joint comparison. With the 3D models constructed from a set of liver-gallbladder CT data, experiments are conducted for joint liver-gallbladder retrieval. Encouraging result shows that it can reveal important topology based on similarity and variance of 3D shapes and has a similar performance compared to that of manual retrieval by human operators. © 2012 Springer-Verlag.

关键词： Diagnosis

来源：评论

学校读者我要写书评

暂无评论

A Parallel-in-time Method Based on Preconditioner for Biot’s Model

arXiv

引用

arXiv 2023年

作者： Zhou, Zeyuan Gu, Huipeng Ju, Guoliang Xing, Wei Faculty of Aerospace Engineering Technische Universiteit Delft Delft2629 HS Netherlands Department of Mathematics Southern University of Science and Technology Shenzhen518055 China Research and Development Department Tenfeng Shenzhen518055 China High Performance Computing Department National Supercomputing Center Shenzhen518055 China

We proposed a parallel-in-time method based on preconditioner for Biot’s consolidation model in poroelasticity. In order to achieve a fast and stable convergence for the matrix system of the Biot’s model, we design two preconditioners with approximations of the Schur complement. The parallel-in-time method employs an inverted time-stepping scheme that iterates to solve the preconditioned linear system in the outer loop and advances the time step in the inner loop. This allows us to parallelize the iterations with a theoretical parallel efficiency that approaches 1 as the number of time steps and spatial steps grows. We demonstrate the stability, accuracy, and linear speedup of our method on HPC platform through numerical experiments. Copyright © 2023, The Authors. All rights reserved.

关键词： Numerical methods

来源：评论

学校读者我要写书评

暂无评论

New Java memory model L-JMM

引用

Jisuanji Yanjiu yu Fazhan/Computer Research and development 2006年第4期43卷 738-743页

作者： Wu, Junmin Chen, Guoliang Department of Computer Science and Technology University of Science and Technology of China Hefei 230027 China Anhui Province Co-Key Laboratory of High Performance Computing and Application University of Science and Technology of China Hefei 230027 China

Java memory model (JMM) is an important topic in Java language and Java virtual machine (JVM) design. But the memory model in Java specification can't guarantee the safely running of Java multithread code. It needs memory coherence, which imposes constraints that prohibit JVM implementation optimization. To fix the problem of Java memory model in Java specification, a new Java memory model, L-JMM, is proposed, which is based on location consistency. This model extends the location consistency to adapt the features of Java technology. It also defines the rule of Java multithread memory operation, including ordinary variable rule, volatile variable rule, final variable rule and synchronization rule. It is proved that this memory model has the same property as location consistency. It can guarantee the correctness for Java multithread code. It can also improve the performance of Java virtual machine. Finally, the simulation of this memory model in the simulator MMS verifies that the new model boasts a better performance than the Java specification memory model does.

关键词： Java programming language

来源：评论

学校读者我要写书评

暂无评论

A 3-D whole-body human thermoregulatory model to simulate cold-induced vasodilation in the hands and feet

引用

Computers in Biology and Medicine 2024年 180卷 108935页

作者： Singh, Manpreet Reifman, Jaques Rubio, Jose E. Department of Defense Biotechnology High Performance Computing Software Applications Institute Telemedicine and Advanced Technology Research Center United States Army Medical Research and Development Command Fort Detrick MD United States The Henry M. Jackson Foundation for the Advancement of Military Medicine Inc. Bethesda MD United States

The cold-induced vasodilation (CIVD) response of the human body to Arctic-like environments helps delay or prevent cold injuries to peripheral regions, such as the hands and feet. To more comprehensively predict the thermal responses of these body regions to cold stress, here we extended our previously developed and validated anatomically accurate three-dimensional whole-body thermoregulatory human model by incorporating a new phenomenological formulation of the CIVD mechanism. In this formulation, we modulated the cyclic vasodilation and vasoconstriction flow of warm blood from the body core to the peripheral regions solely by determining the heat-transfer exchange between the skin and the surrounding environment, and deactivated it when the core body temperature decreased to 36.5 °C. In total, we calibrated and validated the model using eight distinct studies involving 153 unique male subjects exposed to 10 diverse experimental conditions, including cold-air exposure of the whole body as well as air exposure and cold-water immersion of the hand or the foot. With CIVD incorporated, the model predictions generally yielded root mean square errors (RMSEs) of © 2024

关键词： Heat transfer

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：