检索结果-内蒙古大学图书馆

discovering latent themes in aviation safety reports using text mining and network analytics

International Journal of Transportation Science and Technology 2024年第4期16卷 292-316页

作者： Yingying Xing Yutong Wu Shiwen Zhang Ling Wang Haoyuan Cui Bo Jia Hongwei Wang The Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji UniversityShanghai201804China Institute of Safety Operation Research Institute China Eastern Technology Application R&D CenterShanghai 201707China Institute of High Performance Computing(IHPC) Agency for ScienceTechnology and Research(A*STAR)Singapore 138632Singapore

Aviation accidents,referring to unexpected and undesirable events involving aircraft,often cause great damage to property and human *** from historical accidents is pivotal for improving safety in ***,aviation accidents are typically documented and stored as unstructured or semi-structured free-text,rendering the ability to analyze such data a difficult *** study presents a novel framework that combines text mining and network analytics techniques to provide the ability to analyze aviation accident reports *** framework comprises a four-step modelling approach to:(1)the transformation of unstructured aviation safety report texts into structured numeric matrices using the TF-IdF matrix;(2)the identification of aviation accident topics using a structural topic model(STM);(3)the production of a word co-occurrence network(WCN)to determine the interrelations between aviation safety risk factors;and(4)quantitative analysis by technology of keywords to pinpoint key causal factors in aviation safety *** proposed framework is validated by analyzing aviation accident reports collected by the National Transportation Safety Board(NTSB).The results indicate that STM provides a more granular partitioning of topics and better distinguishes between similar events compared to traditional latent dirichlet allocation(LdA).Among the identified topics,“Fuel and Power”and“En-route Phase”have the highest occurrence rate according to ***,“Aircraft Crash”is the most prevalent topic in aviation accidents that resulted in fatal injuries,whereas the“Landing phase”is the most prevalent topic in nonfatal injuries on *** on the WCN,three centrality measures highlight“inspection of equipment”and“take off”as the most important risk factors in aviation *** proposed framework provides a comprehensive solution for in-depth analysis of aviation safety reports,offering decision support for aviation safety management and ac

关键词： Aviation safety Aviation accident report Text mining Topic modeling Network analysis

来源：评论

学校读者我要写书评

暂无评论

Thickness Effect of Nanocrystalline Layer on the deformation Mechanism of Amorphous/Crystalline Multilayered Structure

引用

Computer Modeling in Engineering & Sciences 2019年第8期120卷 293-304页

作者： Wen-Jay Lee Yu-Chien Lo Anchen Yang Kuanpeng Chen Nan-Yow Chen National Center for High-Performance Computing No.22Keyuan Rd.Central Taiwan Science ParkTaichung City 40763Taiwan Department of Materials Science and Engineering National Chiao Tung UniversityNo.1001 University Rd.Hsinchu 30010Taiwan National Center for High-Performance Computing No.7R&D 6th Rd.Hsinchu Science ParkHsinchu City 30076Taiwan

different thickness of amorphous/nanocrystalline multi-layered structure can be used to modulate the strength and ductility of the composite *** this work,molecular dynamics simulations were conducted to study the thickness effect of nanocrystalline layer on mechanical properties and deformation behavior of the Cu64Zr36/Cu multi-layer *** stress-strain relationship,local stress,local strain,and deformation mechanism are *** results reveal that the change of thickness of the crystalline layer significantly affects the mechanical properties and deformation *** the strain at the elastic region,the amorphous Cu64Zr36 layer dominates the mechanical behavior,leading the fact that Young’s modulus,first yielding stress,and first yielding strain are close to that of Cu64Zr36 *** the strain at the plastic region,the contribution of the crystalline layer on the mechanical behavior becomes more and more significant with increasing the thickness of the crystalline *** the thickness ratio(amorphous/crystalline)of 4,the shear band deformation of amorphous layer dominates the mechanical *** the thickness ratio is 1,the glide dislocation of the crystalline layer dominates the stress-strain behavior.

关键词： Molecular dynamics Cu64Zr36 bulk metallic glass Cu64Zr36/Cu layered structure shear band mechanical property deformation

来源：评论

学校读者我要写书评

暂无评论

The design and implementation of patent collaboration managing platform based on cloud architecture

The design and implementation of patent collaboration managi...

引用

IEEE International Conference on Software Engineering and Service Sciences (ICSESS)

作者： Xiang Wang Yong Yang Xiaoguang Lin Yongyuan Chen Ju Zhang High Performance Computing Application R&D Center Chinese Academy of Sciences Chongqing China

ISBN: (纸本)9781479932801

The patent information data has the characteristics of massive, open, scattered, but the lack of a well-designed platform which can make good use of these data is still a problem. The platform introduced in this paper which is mainly tailored for patent agencies can organize resource information, provide analysis report, and promote business cooperation. Based on cloud architecture, the platform has been designed and implemented to integrate the patent data from different systems, allocate resources dynamically through virtualization technology, and provide high-value services by depth data analysis. At present, this platform is applied as a business cooperation platform in the project of patent-cloud in Chongqing.

关键词： Patents Collaboration Cloud computing Virtualization Servers Business databases

来源：评论

学校读者我要写书评

暂无评论

The design and Implementation of Patent Collaboration Managing Platform Based on Cloud Architecture

The Design and Implementation of Patent Collaboration Managi...

引用

2014 IEEE 5th International Conference on Software Engineering and Service Science

作者： Xiang Wang Yong Yang Xiaoguang Lin Yongyuan Chen Ju Zhang High Performance Computing Application R＆D Center Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences

The patent information data has the characteristics of massive,open,scattered,but the lack of a well-designed platform which can make good use of these data is still a *** platform introduced in this paper which is mainly tailored for patent agencies can organize resource information,provide analysis report,and promote business *** on cloud architecture,the platform has been designed and implemented to integrate the patent data from different systems,allocate resources dynamically through virtualization technology,and provide high-value services by depth data *** present,this platform is applied as a business cooperation platform in the project of patent-cloud in Chongqing.

关键词： cloud architecture business cooperation patent-cloud data analysis system integration

来源：评论

学校读者我要写书评

暂无评论

Quasistationary States of an Electron in Open Quantum dots 5

Quasistationary States of an Electron in Open Quantum Dots

引用

5th Pacific rim Conference on Lasers and Electro-Optics, CLEO/Pacific rim 2003

作者： Lin, Ming-Chieh Chuu, der-San NanoScience Research Team Department of R&D National Center for High-Performance Computing 7 R&D Rd. VI Science-Based Industrial Park Hsinchu300 Taiwan Department of Electrophysics National Chiao Tung University Hsinchu Taiwan

ISBN: (纸本)0780377664

The quasistationary states of an electron in a spherically N-layered open quantum dot are investigated. A novel complex eigen-solver is presented to determine both the resonance positions Er and the corresponding lifetimes τ of the system. In this eigen-solver, the wave functions are expressed in terms of the Whittaker functions with complex arguments, and the effective-mass Schrödinger equation is solved analytically. The quasistationary states in terms of the complex eigen-energies, Ek-ih/(2π), are extracted numerically in the complex plane by Newton's method. All the quasistationary states of the system can be determined via this eigen-solver. For illustration, the numerical calculations are carried out for the HgS/CdS/HgS multi-layered quantum dot. Both the energy levels and the lifetimes of the quasistationary states are found as functions of the geometric parameters of the system. The lifetime of an electron in such a system is very sensitive to the geometric characteristics. © 2003 IEEE.

关键词： Mercury compounds

来源：评论

学校读者我要写书评

暂无评论

A Lie-group Approach for Solving Backward Two-dimensional Nonlinear Klein-gordon Equation

引用

Procedia Engineering 2014年 79卷 590-598页

作者： Chih-Wen Chang Chia-Chen Kuo National Center for High-Performance Computing No. 22 Keyuan Rd. Central Taiwan Science Park Taichung City 40763 Taiwan National Center for High-Performance Computing No. 7 R&D 6th Rd. Hsinchu Science Park Hsinchu City City 30067 Taiwan

In this paper, the backward two-dimensional nonlinear Klein-Gordon equation is solved by using a Lie-group approach. Because the solution does not continuously depend on the presented data, the inverse problem is famous for seriously ill-posed. A numerical example of the backward nonlinear Klein-Gordon equation demonstrates that this method is applicable, and the computational cost is quite cheap. Although the recovery of a presently wave is from the final time and under a large noise imposed on the final time data, this algorithm still works effectively and accurately. These numerical results are rather important in the computations of backward nonlinear Klein-Gordon equation.

关键词： Nonlinear Klein-Gordon equation Backward wave problem Inverse problem Strongly ill-posed problem Backward group preserving scheme (BGPS).

来源：评论

学校读者我要写书评

暂无评论

Three-dimensional simulation of the femto-second pulsed laser interacting with a nitrogen molecule

Three-dimensional simulation of the femto-second pulsed lase...

引用

作者： Lee, Y.-M. Jiang, T.-F. Su, Z.-Y. Wu, J.-S. Computational Application Division National Center for High-Performance Computing 7 R and D Road VI Hsinchu 30076 Taiwan Institute of Physics National Chiao Tung University 1001 Ta-Hsueh Road Hsinchu 30010 Taiwan Department of Mechanical Engineering National Chiao Tung University 1001 Ta-Hsueh Road Hsinchu 30010 Taiwan

Interaction of femto-second pulsed laser with a nitrogen molecule at various angles is investigated numerically in the present study. We propose a three-dimensional time-dependent Schrödinger equation (TdSE) solver using finite volume method (FVM) with single-active-electron (SAE) assumption. We construct the model potential by combining the soft-Coulomb potential and Yukawa potential and fitting both the first ionization energy and orbital type of highest-occupied molecular orbital (HOMO) of a N2 molecule. The ratio of simulated maximum (χ=0°) to minimum (χ=90°) ionization yield is 1.9 and it agrees more favorably with the converted experimental data (2.3-3.3) than the MO-AdK model does (10.0). This shows that the proposed model potential in the 3d TdSE solver can faithfully predict the ionization of a nitrogen molecule under strong pulsed laser incidence and is a very useful tool for future application in similar analysis of more complicated molecules. © 2010 Elsevier B.V. All rights reserved.

关键词： Pulsed lasers

来源：评论

学校读者我要写书评

暂无评论

A new bio-inspired location search algorithm for peer to peer network based Internet telephony 06

A new bio-inspired location search algorithm for peer to pee...

引用

Bio-Inspired Models of Network, Information and computing Systems, BIONETICS

作者： Sachin Kulkarni Niloy Ganguly Geoffrey Canright Andreas deutsch Department of Computer Science and Engineering Indian Institute of Technology Kharagpur Kharagpur India R&D Telenor Oslo Norway Center for Information Services High Performance Computing Dresden Germany Center for Information Services and High Performance Computing (ZIH) TU-Dresden Dresden

ISBN: (纸本)9781424404636

In this paper, we propose a p2p network based location search algorithm which can be used to establish connections in Internet telephony. By using the location search algorithm, the caller can identify the peer it is calling. The algorithm is based upon the concept of gradient search and is applicable upon unstructured networks. It is inspired by a biological phenomenon called haptotaxis. The algorithm performs at par with dHT-based location search algorithms, however it is much more robust than such structured algorithms. We also present some initial analysis to explain the reason behind the superiority of the algorithm

关键词： Peer to peer computing Internet telephony Protocols Network address translation robustness Algorithm design and analysis Costs Computer science high performance computing Biology computing

来源：评论

学校读者我要写书评

暂无评论

Steady states of a field-emission-limited diode: space-charge effects

Steady states of a field-emission-limited diode: space-charg...

引用

IEEE International Conference on Vacuum Microelectronics (IVMC)

作者： Ming-Chieh Lin Hao-Ming Chung der-San Chuu NanoScience Research Team Department of R&D National Center of High-performance Computing Hsinchu Taiwan Department of Electrophysics National Chiao Tung University Hsinchu Taiwan

ISBN: (纸本)4818195154

In this work, field-emission-limited diodes (FELds) are investigated. The field emission process is described quantum-mechanically by the Fowler-Nordheim equation. The cathode plasma and surface properties are considered within the framework of the effective work function approximation. Space charge effects are described by Poisson's equation.

关键词： Schottky diodes Poisson equations Cathodes Voltage Current density Function approximation Electrons research and development Plasma properties Space charge

来源：评论

学校读者我要写书评

暂无评论

research on the multidimensional educational review strategy Based on MOOCs Integrated by the multidimensional learning theory

Research on the multidimensional educational review strategy...

引用

2015 World Congress on Engineering and Computer Science, WCECS 2015

作者： Ming, Li Ju, Zhang Jingzhong, Zhang Lian, Chen High Performance Computing Application R and D Center Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China Automated Reasoning and Cognition Key Laboratory of Chongqing Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China Laboratory for Automated Reasoning and Programming Chengdu Institute of Computer Applications Chinese Academy of Sciences Chengdu China

ISBN: (纸本)9789881925367

Through a detailed analysis of the theoretical basis for MOOCs in terms of educational learning theories, this paper attempts at finding the corresponding relationship between the theories and MOOCs, which not only theoretically explains the reasons why MOOCs exceed all the previous education models, but also empirically proves it with voluminous facts and data. The author conducts this research in the hope of enlightening the online education platform of other types. Besides, this paper provides the model framework and strategy to multidimensional educational review based on MOOCs. The model and strategy are applicable not only to MOOCs, the large-scale online education, but also to various online education platforms.

关键词： E-learning

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：