检索结果-内蒙古大学图书馆

Methodology for the assessment of the friction torque of ball slewing bearings considering preload scatter

Friction 2024年第8期12卷 1838-1857页

作者： Iñigo ESCANCIANO Iker HERAS Florian SCHLEICH Josu AGUIRREBEITIA Department of Mechanical Engineering University of the Basque CountryBilbao 48080Spain Fraunhofer-Institute for Wind Energy Systems IWES Hamburg 27572Germany

This manuscript presents an innovative methodology for the assessment of the friction torque of ball slewing *** methodology aims to overcome the limitations of state-of-the-art approaches,especially when the friction torque is conditioned by the preload of the *** this end,the authors propose to simulate the preload scatter when solving the load distribution problem,prior to the friction torque *** preload scatter allows to simulate a progressive transition of the balls from a four-point contact state to a two-point contact *** implementing this capability into an analytical model,the authors achieve a successful correlation with experimental ***,depending on the stiffness of the structures to which the bearing is assembled,it is demonstrated that the rigid ring assumption can lead to inaccurate friction torque results when a tilting moment is *** methodology described in this research work is meant to have a practical ***,the manuscript provides guidelines about how to use and tune the analytical model to get a reliable friction torque prediction tool.

关键词： slewing bearing ball bearing friction torque preload scatter

来源：评论

学校读者我要写书评

暂无评论

An architecture for interoperation of distributed heterogeneous database systems

An architecture for interoperation of distributed heterogene...

引用

7th International Conference on Database and Expert systems Applications (DEXA 96)

作者： Wu, XQ ISST Fraunhofer Institute for Software Engineering and Systems Engineering Postfach 520130 44207 Dortmund Germany

ISBN: (纸本)354061656X

As database technology advances rapidly, there are usually heterogeneous databases (hierarchical, relational or object-oriented databases) used by different departments in an enterprise. On the other hand, the object-oriented technology is becoming the dominant application development paradigm. Thus, there is a data modeling gap between applications and heterogeneous databases. In this paper we present different architecture aspects of the system VHDBS1, which has been developed by an ongoing research project. This architecture provides a way to support cooperative access to distributed heterogeneous databases and to fill the data modeling gap in a distributed heterogeneous environment.

关键词： Object-oriented databases

来源：评论

学校读者我要写书评

暂无评论

A practical approach to type inference for EuLisp

引用

LISP and Symbolic Computation 1993年第1-2期6卷 159-175页

作者： Kind, Andreas Friedrich, Horst Fraunhofer Institute for Software Engineering and Systems Engineering (ISST) Berlin 10117 Kurstrasse 33 Germany

Lisp applications need to show a reasonable cost-benefit relationship between the offered expressiveness and their demand for storage and run-time. Drawbacks in efficiency, apparent in Lisp as a dynamically typed programming language, can be avoided by optimizations. Statically inferred type information can be decisive for the success of these optimizations. This paper describes a practical approach to type inference realized in a module and application compiler for EuLisp. The approach is partly related to Milner-style polymorphic type inference, but differs by describing functions with generic type schemes. Dependencies between argument and result types can be expressed more precisely by using generic type schemes of several lines than by using the common one-line type schemes. Generic type schemes contain types of a refined complementary lattice and bounded type variables. Besides standard and defined types so-called strategic types (e.g. singleton, zero, number-list) are combined into the type lattice. Local, global and control flow inference using generic type schemes with refined types generate precise typings of defined functions. Due to module compilation, inferred type schemes of exported functions can be stored in export interfaces, so they may be reused when imported elsewhere. © 1993 Kluwer Academic Publishers.

关键词： Compilation Lisp Type Inference Unification

来源：评论

学校读者我要写书评

暂无评论

Reliability of design approaches for axially loaded offshore piles and its consequences with respect to the North Sea

引用

Journal of Rock Mechanics and Geotechnical engineering 2018年第6期10卷 1112-1121页

作者： Kirill A.Schmoor Martin Achmus Aligi Foglia Maik Wefer Institute for Geotechnical Engineering Leibniz University HannoverHannover30167Germany Fraunhofer Institute for Wind Energy Systems(IWES) Bremerhaven27572Germany

In the near future, several offshore wind farms are planned to be built in the North Sea. Therefore, jacket and tripod constructions with mainly axially loaded piles are suitable as support structures. The current design of axial bearing resistance of these piles leads to deviant results regarding the pile resistance when different design methods are adopted. Hence, a strong deviation regarding the required pile length must be addressed. The reliability of a design method can be evaluated based on a model error which describes the quality of the considered design method by comparing measured and predicted pile bearing resistances. However, only few pile load tests are reported with regard to the boundary conditions in the North Sea. This paper presents 6 large-scale axial pile load tests which were incorporated within a new model error approach for the current design methods used for the axial bearing resistance,namely API Main Text method and cone penetration test(CPT)-based design methods, such as simplified ICP-05, offshore UWA-05, Fugro-05 and NGI-05 methods. Based on these new model errors, a reliabilitybased study towards the safety was conducted by performing a Monte-Carlo simulation. In addition,consequences regarding the deterministic pile design in terms of quality factors were evaluated. It is shown that the current global safety factor(GSF) prescribed and the partial safety factors are only valid for the API Main Text and the offshore UWA-05 design methods; whereas for the simplified ICP-05,Fugro-05 and NGI-05 design methods, an increase in the required embedded pile length and thus in the GSF up to 2.69, 2.95 and 3.27, respectively, should be considered to satisfy the desired safety level according to DIN EN 1990 of b ? 3.8. Further, quality factors for each design method on the basis of all reliability-based design results were derived. Hence, evaluation of each design method regarding the reliability of the pile capacity prediction is possible.

关键词： Pile load test Model error System reliability Global safety factors(GSFs) Quality factors

来源：评论

学校读者我要写书评

暂无评论

Knowledge-based Interactive Configuration Tool for Industrial Augmented Reality systems 5

Knowledge-based Interactive Configuration Tool for Industria...

引用

5th International Conference on Information and Computer Technologies, ICICT 2022

作者： Eckertz, Daniel Anacker, Harald Dumitrescu, Roman Systems Engineering Fraunhofer Institute for Mechatronic Systems Design Iem Paderborn Germany Product Engineering Fraunhofer Institute for Mechatronic Systems Design Iem Paderborn Germany

ISBN: (数字)9781665469609

ISBN: (纸本)9781665469609

The innovative technology Augmented Reality (AR) provides enormous potentials for companies. But due to the high technological complexity and the lack of expertise and experience in companies, the potentials are only rarely exploited. One major challenge for companies is the demand-oriented configuration of the AR system for a specific application scenario. This includes the selection of a suitable AR device and the specification of the AR application software. Relevant knowledge is only implicitly available in a variety of individual distributed sources. Companies therefore heavily rely on technology providers or experts when using AR. This work presents a novel knowledge-based approach to support companies in the individual AR system configuration. Based on a digital knowledge base an interactive configuration tool is developed. The tool enables the targeted selection of a suitable AR device and required AR software functionalities for a custom application scenario considering individual circumstantial conditions and requirements. It thereby empowers companies to configure AR systems independently and without prior expertise, facilitating the exploitation of the potentials of AR. © 2022 IEEE.

关键词： Augmented reality

来源：评论

学校读者我要写书评

暂无评论

TiEE - The Telemedical ILOG Event engine: Optimization of information supply in telemedicine 6

TiEE - The Telemedical ILOG Event engine: Optimization of in...

引用

6th International Workshop on Information Logistics, Knowledge Supply and Ontologies in Information systems, ILOG 2013 - Co-located with 12th International Conference on Perspectives in Business Informatics Research, BIR 2013

作者： Meister, Sven Schafer, Sven Stahlmann, Valentin Fraunhofer Institute for Software and Systems Engineering Dortmund Germany

Ongoing problems in healthcare supply make it imperative to establish telemedicine as a feasible concept to ensure the quality of medical treatments and reduce costs. With TiEE, the Telemedical ILOG Event Engine, fraunhofer ISST fosters the research to process streams of vital signs in telemedical scenarios using Complex Event Processing (CEP) in an Information Logistics (ILOG) manner. ILOG means to reduce the amount of information by preprocessing existing data and to route high-grade decision at the right time to the right person. As basic building blocks we developed the concepts of telemedical events (TE), Telemedical ILOG Listener (TIL) and TIL-Profiles on top of the event processing engine Esper [20-23]. TiEE analyzes the incoming patient specific streams of telemedical events and tries to detect relevant trend patterns. In a second step these got aggregated to higher level decisions.

关键词： Telemedicine

来源：评论

学校读者我要写书评

暂无评论

Implementing the pragmatic web: Practical approaches 1

Implementing the pragmatic web: Practical approaches

引用

1st International Conference on the Pragmatic Web, PragWeb 2006

作者： Kamphusmann, Thomas Fraunhofer–Institute for Systems– and Software Engineering Dortmund Germany

来源：评论

学校读者我要写书评

暂无评论

Model maturity levels for embedded systems development, or: Working with warnings

Model maturity levels for embedded systems development, or: ...

引用

3rd Int. Workshop on Model Based Architecting and Construction of Embedded systems, ACES-MB 2010 - Held as Part of the 2010 Int. Conf. on Model Driven engineering Languages and systems, MoDELS 2010

作者： Große-Rhode, Martin Fraunhofer Institute for Software and Systems Engineering Berlin Germany

The more modelling substitutes programming the more modelling tools should become development environments. Beyond enforcing the syntactic correctness of models tools should support a methodologically guided development in which milestones are indicated and warnings are generated to inform the user about issues that are to be solved to reach these milestones. In this paper we present an approach from the embedded systems domain that is materialized by the implementation of a prototypical model development environment. It indicates model maturity levels that correspond to an underlying development method and shows in the model maturity view which elements or parts of the model do not yet reach a level and why they do not reach it.

关键词： Embedded systems

来源：评论

学校读者我要写书评

暂无评论

Model-based development of context-aware applications using the MILEO-context server

Model-based development of context-aware applications using ...

引用

2012 IEEE International Conference on Pervasive Computing and Communications Workshops, PERCOM Workshops 2012

作者： Wojciechowski, Manfred Wiedeler, Markus Fraunhofer Institute for Software and Systems Engineering Dortmund Germany

ISBN: (纸本)9781467309073

In this paper we describe our methodology for building context-aware applications. It supports a systematic definition, conception and development of the context-aware features of an application along the different phases of a software development process. Its application has helped us in the discussion and conception of these features in project teams with non-technical domain experts. A context meta-model defines the common concepts and features of concrete context models, which are used in the transition between the different development phases. This context meta-model has been implemented in our context server MILEO. Thus it allows a model-based realization of an application's context logic without explicit programming. We describe how we have applied our methodology in the project 'Daily Care Journal'. © 2012 IEEE.

关键词： Application programs

来源：评论

学校读者我要写书评

暂无评论

Transitioning towards sustainable heating: A mixed-methods study of heat pump acceptance among Flemish homeowners

引用

Energy Research and Social Science 2025年 126卷

作者： Martens, Emma Naeyaert, Sofie Van Hove, Stephanie Pelka, Sabine Preuß, Sabine Gabriel, Marta Conradie, Peter Ponnet, Koen imec-mict-UGent Miriam Makebaplein 1 Ghent 9000 Belgium Department of Industrial Systems Engineering and Product Design Faculty of Engineering and Architecture Ghent University Campus Kortrijk Graaf Karel de Goedelaan 5 Kortrijk 8500 Belgium Department of Communication Studies Faculty of Political and Social Sciences Ghent University Sint-Pietersnieuwstraat 41 Ghent 9000 Belgium Fraunhofer Institute for Systems and Innovation Research Breslauer Str. 48 Karlsruhe 76139 Germany Energy and Industry Group Faculty of Technology Policy and Management Delft University of Technology Jaffalaan 5 BX Delft 2628 Netherlands INEGI Institute of Science and Innovation in Mechanical and Industrial Engineering Rua Dr. Roberto Frias 400 Porto 4200-465 Portugal

To meet EU climate goals, reducing fossil fuel use is crucial, and transitioning domestic energy consumption to sustainable sources like heat pumps offers a potential solution. However, uptake in Flanders remains low. This study explores predictors of heat pump adoption intention among Flemish homeowners using a mixed-methods approach. A quantitative survey based on an extended Theory of Planned Behaviour model (Study 1, n = 692, M_age = 55.03, SD_age = 15.54, male/female = 335/357) is complemented by semi-structured interviews with homeowners who do not own a heat pump (Study 2, n = 16, M_age = 41, SD_age = 35, male/female = 8/8). Study 1 indicates that perceived behavioural control and subjective norms positively influence heat pump adoption intention, with perceived behavioural control enhanced by product knowledge and technological innovativeness. Surprisingly, a positive attitude towards heat pumps is associated with a lower adoption intention. Study 2 reveals cost concerns, uncertainties about energy cost savings and property value increases as barriers to adoption intention, alongside a temporal disconnect between attitude and intention due to practical constraints. Our findings offer suggestions for communication strategies of policy makers such as addressing financial and practical barriers, mitigating practical constraints and enhancing public knowledge. Lastly, our survey results suggest the presence of yet unidentified moderating variables affecting the attitude-intention relationship, which could be determined in future research. © 2025 Elsevier Ltd

关键词： Heat pump adoption intention Renewable energy Sustainable behaviour change Sustainable energy Theory of planned behaviour TPB

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：