检索结果-内蒙古大学图书馆

Evaluating, Learning and Simulation Exercise for Efficacy, A Course on Advanced Prehospital Trauma Care

Prehospital and Disaster Medicine 2017年第S1期32卷 S222-S223页

作者： Erik Prytz Jonas Rybing Henrik Carlsson Carl-Oscar Jonson Department Of Computer And Information Science Linköping University Linköping/Sweden Centre For Teaching And Research In Disaster Medicine And Traumatology Linköping University Linköping/Sweden Centre For Teaching And Research In Disaster Medicine And Traumatology And Department Of Clinical And Experimental Medicine Linköping University Linköping/Sweden

来源：评论

学校读者我要写书评

暂无评论

A longitudinal study of urban moveability and physical activity in the transition phase from childhood to adolescence

引用

Revue d'Épidémiologie et de Santé Publique 2018年 66卷 S274-S275页

作者： C. Buck F. Lauria G. Eiben K. Konstabel A. Page I. Pigeot W. Ahrens Biometry and Data Management Leibniz Institute for Prevention Research and Epidemiology BIPS Bremen Germany Institute of Food Sciences National Research Council Avellino Italy Section for Epidemiology and Social Medicine Institute of Medicine Sahlgrenska Academy University of Gothenburg Gothenburg Sweden Department of Chronic Diseases National Institute for Health Development Tallinn Estonia Centre for Exercise Nutrition & Health Sciences University of Bristol Bristol United Kingdom Faculty of Mathematics and Computer Science University of Bremen Bremen Germany Epidemiological Methods and Etiological Research Leibniz Institute for Prevention Research and Epidemiology BIPS Bremen Germany

Introduction Physical activity (PA) is one of the most important lifestyle behaviors to reduce the risk for non-communicable diseases. Positive effects of the urban environment on PA in terms of walkability measures such as street connectivity, land use mix, and availability of public open spaces in the urban neighborhood are well investigated. However, evidence of this association is mostly based on cross-sectional studies. Usually, discrete measures of urban point characteristics such as the simple intensity are calculated based on arbitrary municipal districts inducing scaling bias. The present study aims to longitudinally investigate the effect of built environment characteristics on PA of children in their transition phase to adolescence. We considered a kernel intensity approach to assess built environment characteristics and linked urban measures with objectively measured PA data that were collected in the IDEFICS/*** cohort. methods Spatial data were collected in six study regions of three countries, Germany, Italy, and Sweden, participating in the IDEFICS/*** cohort. We considered walkability measures such as population density, land use mix (LUM), street connectivity, and availability of public transit. We additionally assessed the availability of public open spaces (POS). Point characteristics, e.g. intersections or POS, were assessed via adaptive anisotropic kernel functions. Urban measures were calculated in network-dependent home neighborhoods using a network distance of 1 km. We used standardized z-scores of urban measures to construct a moveability index that quantifies urban opportunities for PA of children and adolescents. Based on the place of residence, we linked urban measures with individual-level data of 699 children aged 2 to 14, who provided at least two ( n = 610) or three ( n = 89) accelerometer measurements, from either baseline, first follow-up (IDEFICS study), or second follow-up (*** study) with in total 1487 o

关键词：

来源：评论

学校读者我要写书评

暂无评论

IFSM fractal image compression with entropy and sparsity constraints: A sequential quadratic programming approach

引用

AIP Conference Proceedings 2017年第1期1798卷

作者： Herb Kunze Davide La Torre Jianyi Lin 1Department of Mathematics and Statistics University of Guelph Guelph Canada 2Department of Economics Management and Quantitative Methods University of Milan Milan Italy 3Department of Mathematics Nazarbayev University Astana Kazakhstan 4Department of Computer Science University of Milan Milan Italy

We consider the inverse problem associated with IFSM: Given a target function f , find an IFSM, such that its fixed point f¯ is sufficiently close to f in the Lp distance. Forte and Vrscay [1] showed how to reduce this problem to a quadratic optimization model. In this paper, we extend the collage-based method developed by Kunze, La Torre and Vrscay ([2][3][4]), by proposing the minimization of the 1-norm instead of the 0-norm. In fact, optimization problems involving the 0-norm are combinatorial in nature, and hence in general NP-hard. To overcome these difficulties, we introduce the 1-norm and propose a Sequential Quadratic Programming algorithm to solve the corresponding inverse problem. As in Kunze, La Torre and Vrscay [3] in our formulation, the minimization of collage error is treated as a multi-criteria problem that includes three different and conflicting criteria i.e., collage error, entropy and sparsity. This multi-criteria program is solved by means of a scalarization technique which reduces the model to a single-criterion program by combining all objective functions with different trade-off weights. The results of some numerical computations are presented.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Developing web applications for different architectures: The MoWebA approach

Developing web applications for different architectures: The...

引用

International Conference on Research Challenges in Information science, RCIS

作者： Magalí González Luca Cernuzzi Nathalie Aquino Oscar Pastor Department of Electronics and Computer Science Catholic University “Nuestra Señora de la Asunción” Asunción Paraguay Research Center on Software Production Methods Universitat Politècnica de València Valencia Spain

ISBN: (纸本)9781479987115

This study presents the Architecture Specific Model (ASM) defined by the MoWebA approach to improve the development of web applications for different architectures. MoWebA is a model-driven approach to web applications development. The article presents a general overview of MoWebA, including the methodological aspects related to its modeling and transformation processes, the process of defining the ASM, and an example of an ASM model. We finally present a preliminary validation experience and its main results. The experience was structured according to the proposal of Runeson et al. for case studies.

关键词： computer architecture Unified modeling language Computational modeling Service-oriented architecture Navigation Proposals Adaptation models

来源：评论

学校读者我要写书评

暂无评论

Indomethacin and diclofenac in the prevention of post-ERCP pancreatitis: a systematic review and meta-analysis of prospective controlled trials

引用

Pancreatology 2017年第3期17卷 S102-S103页

作者： Árpád V. Patai Norbert Solymosi László Mohácsi Árpád Patai Semmelweis University 2nd Department of Medicine Budapest Hungary University of Veterinary Medicine Biometeorology Research Group Budapest Hungary Corvinus University of Budapest Department of Computer Science Budapest Hungary Markusovszky University Teaching Hospital Department of Gastroenterology and Medicine Szombathely Hungary

来源：评论

学校读者我要写书评

暂无评论

Fatigue testing of titanium alloy Ti6Al4V used in medical devices 15th

Fatigue testing of titanium alloy Ti6Al4V used in medical de...

引用

15th Polish Conference on Fracture Mechanics and Fatigue, 2015

作者： Wiriwcki, Mateusz Pejkowski, Lukasz Topolinski, Tomasz University of Science and Technology in Bydgoszcz Faculty of Mechanical Engineering Department of Biomedical Engineering Al. Prof. Kaliskiego 7 Bydgoszcz85-796 Poland University of Science and Technology in Bydgoszcz Faculty of Mechanical Engineering Department of Computer Methods Al. Prof. Kaliskiego 7 Bydgoszcz85-796 Poland

ISBN: (纸本)9783038357674

Because titanium alloy Ti6Al4V features low density, good corrosion resistance and biocompatibility, it a metal of choice for medicine, used in orthopedics, accident surgery and dentistry. The insertion of elements such as nitrogen, carbon, hydrogen, iron or oxygen improve fatigue strength of this material. This paper presents certain basic fatigue and monotonic tests performed on the alloy. We have proposed a unique sample geometry and sample dimensions smaller than the reference ones. The dimensions of the working part of the sample correspond to the geometry of a dental implant connector. This part of the implant has to withstand stresses that are both intricate and variable in time. We performed monotonic tensile strength tests and uniaxial fatigue tests using the Instron 8874 machine. Then, we examined the samples under a stereoscopic microscope and measured the fracture development angle. © 2016 Trans Tech Publications, Switzerland.

关键词： Titanium alloys

来源：评论

学校读者我要写书评

暂无评论

Handling inverse optimal control problems using evolutionary bilevel optimization

Handling inverse optimal control problems using evolutionary...

引用

Congress on Evolutionary Computation

作者： Varun Suryan Ankur Sinha Pekka Malo Kalyanmoy Deb Department of Mechanical Engineering Indian Institute of Technology Jodhpur India Production and Quantitative Methods Indian Institute of Management Ahmedabad India Department of Information and Service Economy Aalto University School of Business Finland Computer Science and Engineering Michigan State University USA

Optimal control is a task where it is desired to determine the inputs of a dynamical system that optimize (minimize or maximize) a specified cost functional, also known as performance index, while satisfying any constraints on behaviour of the system. As the name suggests, inverse optimal control is the opposite of the former one and thus is associated with mining of the cost functional, optimal behaviour of which fits the given results best. In this paper, we present the importance of evolutionary bilevel optimization techniques as a promising approach to solve inverse optimal control problems. Generally, inverse optimal control problems are found to be ill posed which makes them computationally expensive in addition to the associated redundancy with the solution. Inverse optimal control theory works as a stepping stone in figuring out the underlying optimality criteria in a given task. It has several other applications in areas like Markov's Decision Processes and Game Theory. In our work, we solve inverse optimal control problems to retrieve the original functional in optimal control task using metaheuristic based bilevel optimization techniques. The dataset comprising of state variables generated from an optimal control problem is utilized to mine the functional. In the later part of our paper, we formulate a problem of human motion transfer as a bilevel optimization task, and subsequently solve it using a bilevel algorithm.

关键词： Optimal control Optimization Linear programming Inverse problems Electronic mail Performance analysis Evolutionary computation

来源：评论

学校读者我要写书评

暂无评论

Active engineering education modules: Summary paper of five years of incremental improvements to the Modules 123

Active engineering education modules: Summary paper of five ...

引用

123rd ASEE Annual Conference and Exposition

作者： Brown, Ashland O. Rencis, Joseph J. Jensen, Daniel D. Schimpf, Paul Henry Crawford, Richard H. Orabi, Ismail I. Watson, Kyle A. Liu, Jiancheng Jackson, Kathy Schmidt Bhattacharyya, Mouchumi Webster, Kevin Leigh Chen, Chuan-Chiang Akasheh, Firas University of the Pacific Department of Mechanical Engineering United States Tennessee Technological University United States U.S. Air Force Academy United States Eastern Washington University Department of Computer Science CheneyWA United States University of Texas Austin United States Pennsylvania State University Teaching and Learning with Technology Group University Park United States California State Polytechnic University Mechanical Engineering Department Pomona United States Tuskegee University United States

The landscape of contemporary engineering education is ever changing, adapting and evolving. Finite element theory and application has often been the focus of graduate-level courses in engineering programs;however, industry needs more bachelor's-level engineering graduates to have skills in applying this essential analysis and design technique. Today's globally competitive world requires fast redesigns of products/processes that are well-suited to using finite element analysis to reduce the design cycle. We have used the Kolb Learning Cycle as a conceptual framework to improve student learning of difficult engineering concepts, and to gain essential knowledge of finite element analysis (FEA) and design content knowledge. A team of researchers, with a National science Foundation grant for the past five years, have created and made improvements to seventeen active learning FEA modules which were originally developed using MSC Nastran, following the development efforts in SolidWorks Simulation, ANSOFT, ANSYS, and other commercial FEA software packages. We summarize the incremental improvements of these learning modules during the past five years as we implemented them into undergraduate courses that covered topics such as machine design, mechanical vibrations, heat transfer, bioelectrical engineering, electromagnetic field analysis, structural fatigue analysis, computational fluid dynamics, rocket design, and chip formation during manufacturing, and large scale deformation in machining. This paper summarizes five years of incremental improvements to the modules comparing the student performance on pre- and post-learning module quizzes to gauge change in student knowledge related to the difficult engineering concepts addressed in each module. The researchers made significant changes to their finite element learning modules annually to improve student understanding of these difficult engineering concepts in their classes. Statistically, significant student performance ga

关键词：

来源：评论

学校读者我要写书评

暂无评论

Relativistic configuration-interaction calculations for atoms with one valence electron based on altering hydrogenlike or Dirac-Fock spin orbitals

引用

Physical Review A 2015年第6期92卷 062505-062505页

作者： Leszek Głowacki Department of Computer Science and Computer Methods Pedagogical University of Cracow Podchorazych 2 Kraków 30-084 Poland

Relativistic configuration-interaction calculations using hydrogenlike or Dirac-Fock spin orbitals of the transition from the ground state to some np1/2, np3/2 low-lying excited states for the alkali metals are presented. In these calculations each virtual spin orbital corresponds to a unique noninteger atomic number determined iteratively using the virtual-particle model. The virtual-particle model based on “condensed-space” idea is here adopted to many electron systems consisting of a single valence electron and the core. The transition energy and the oscillator strength values were computed for sodium, potassium, rubidium, cesium, and francium. Both hydrogenlike and Dirac-Fock basis functions have been used in the computations for comparison.

关键词： Francium

来源：评论

学校读者我要写书评

暂无评论

A mixed parameter scheduling algorithm of node operating system in CPS

A mixed parameter scheduling algorithm of node operating sys...

引用

World Congress on Intelligent Control and Automation (WCICA)

作者： Benhai Zhou Miao Yu Ting Liu Teaching Department of Computer Science Shenyang Institute of Engineering Shenyang City Liaoning Province China Shenyang Power Supply Company China Yuhong Power Supply Bureau of Shenyang Power Supply Company ShenYang Liaoning Province China

ISBN: (纸本)9781467384155

Cyber Physical Systems (CPS) combines physical and computing systems tightly. Node operating systems (OS) are fundamental units in CPS. There are still many problems unsolved when designing CPS especially CPS node OS in aspects of predictability, reliability, robustness, etc. In this paper we propose a mixed priority real time scheduling method to enhance the CPS node OS performance. Generally, CPS node operating system uses a single method to assign priority. The single priority selection method will lead to the high deadline miss ration, which make the node OS performance drop sharply. Aiming at this problem, a scheduling method is proposed whose priority selection is determined by several characteristic parameters. The results show that the DMR of the proposed method is lower than that of single parameter method. Consequently, the predictability and reliability of CPS node OS is improved effectively.

关键词： Operating systems Real-time systems Scheduling algorithms Wireless sensor networks Resource management Multicore processing

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：