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Bionic Optimisation of the Earthquake Resistance of High Buildings by Tuned Mass Dampers

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Journal of Bionic Engineering 2011年第3期8卷 335-344页

作者： rolf Steinbuch Reutlingen Research Institute Reutlingen University Alteburgstr. 150 72762 Reutlingen Germany

The optimisation of earthquake resistance of high buildings by multi-tuned mass dampers was investigated using bionic algorithms. In bionic or evolutionary optimisation studies the properties of parents are crossed and mutated to produce a new generation with slightly different properties. The kids which best satisfy the object of the study, become the parents of the next generation. After a series of generations essential improvements of the object may be observed. Tuned mass dampers are widely used to reduce the impact of dynamic excitations on structures. A single mass system and multi-mass oscillators help to explain the mechanics of the dampers. To apply the bionic optimisation strategy to high buildings with passive tuned mass dampers subject to seismic loading a special beam element has been developed. In addition to the 6 degrees of freedom of a conventional beam element, it has 2 degrees of freedom for the displacements of the dampers. It allows for fast studies of many variants. As central result, efficient designs for damping systems along the height of an edifice are found. The impact on the structure may be reduced essentially by the use of such dampers designed to interact in an optimal way.

关键词： earthquake tuned mass damper bionic optimisation reduced model

Advanced virtual prototyping for cyber-physical systems using RISC-V: implementation, verification and challenges

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Science China(Information Sciences) 2022年第1期65卷 5-21页

作者： Vladimir HERDT rolf DRECHSLER Institute of Computer Science University of Bremen Cyber-Physical Systems DFKI Gmb H

Virtual prototypes(VPs) are crucial in today’s design flow. VPs are predominantly created in System C transaction-level modeling(TLM) and are leveraged for early software development and other system-level use cases. Recently, virtual prototyping has been introduced for the emerging RISC-V instruction set architecture(ISA) and become an important piece of the growing RISC-V ecosystem. In this paper, we present enhanced virtual prototyping solutions tailored for RISC-V. The foundation is an advanced open source RISC-V VP implemented in System C TLM and designed as a configurable and extensible *** scales from small bare-metal systems to large multi-core systems that run applications on top of the Linux operating system. Based on the RISC-V VP, this paper also discusses advanced VP-based verification approaches and open challenges. In combination, we provide for the first time an integrated and unified overview and perspective on advanced virtual prototyping for RISC-V.

关键词： virtual prototyping RISC-V SystemC TLM verification

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Application of Electron Beam Surface Technologies in the Automotive Industry

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材料热处理学报 2004年第5期25卷 573-578页

作者： rolf Zenker Anja Buchwalder TU Bergakademie Freiberg /Zenker Consult Mittweida GermanyTU Bergakademie Freiberg Germany

Progress in the beam deflection technique opens up new possibilities for the application of electron beam (EB) surface and welding technologies in the automotive industry. This development is based on three-dimensional high-speed beam deflection and fully automatic online process control. So, in the EB surface treatment three-dimensional energy transfer fields can be realised which take into account the contour of a component, the conditions of heat conduction and the load conditions. High flexibility, precision and reproducibility are typical characteristics. High productivity is achieved by the simultaneous interaction of the EB in several processing areas or by carrying out several processes simultaneously. EB surface treatment is becoming more and more attractive and important especially in the automotive industry, and also in comparison to laser technologies. This paper deals with different EB surface technologies, for example hardening, remelting, surface alloying, dispersing or cladding of different materials such as steel, cast iron and different alloys of Al, Mg and Ti. Examples of applications in the automotive industry, especially engine components, will be discussed.

关键词：电子注铸铁 3D射束偏移表面热处理

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Aliphatic Halogenated Hydrocarbons: Report and Analysis of Liver Injury in 60 Patients

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Journal of Clinical and Translational Hepatology 2018年第4期6卷 350-361页

作者： rolf Teschke Department of Internal MedicineⅡ Division of Gastroenterology and HepatologyKlinikum HanauHanauAcademic Teaching Hospital of the Medical FacultyGoethe University Frankfurt/MainFrankfurt/MainGermany

Background and Aims:Intoxications by aliphatic halogenated hydrocarbons(AHH),used as effective solvents,are rare and may cause life-threatening liver *** with acute intoxications by AHH received an innovative ***:Analyzed were data of 60 patients intoxicated by AHH,such as dichloromethane(n=3),chloroform(n=2),carbon tetrachloride(n=12),1,2-dichloroethane(n=18),1,1,2-trichloroethane(n=2),trichloroethylene(n=2),tetrachloroethylene(n=13)or mixed AHH chemicals(n=8),who received a new treatment consisting of CO2-induced hyperventilation to accelerate toxin removal via the ***:Added to the inspiration air at a flow rate of 2-3 Liter min-1,CO2 increased the respiratory volume up to 25-30 Liter min-1,ensuring forced AHH *** CO2-induced hyperventilation therapy was commonly well tolerated by the 60 patients and lasted for 106.0±10.5 *** most cases,initially increased liver test results of aminotransferases normalized quickly under the therapy,and liver histology obtained at completion of the therapy revealed,in the majority of patients,normal findings or fatty changes,and rarely severe single cell necrosis but no confluent liver cell *** therapy,clinical outcome was unfavorable for 4/60 patients(6.7%)of the study cohort,due to single or combined risk *** included late initiation of the CO2-induced hyperventilation therapy,intentional intoxication,uptake of high amounts of AHH,concomitant ingestion of overdosed drugs,consumption of high amounts of alcohol,and history of alcohol ***:For intoxications by AHH,effective therapy approaches including forced hyperventilation to increase toxin removal via the lungs are available and require prompt initiation.

关键词： Aliphatic halogenated hydrocarbons Dichloromethane Chloroform Carbon tetrachloride 1,2-dichloroethane

A Self-consistent Treatment of Disoriented Chiral Condensates

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Chinese Physics Letters 1998年第10期15卷 708-710页

作者： ZHUANG Peng-fei rolf Fauser Department of Physics Tsinghua UniversityBeijing 100084 Theoretical Physics Group Gesellschaft fr Schwerionenforschung GSID-64291 DarmstadtGermany

A system with disoriented chiral condensates(DCCs)is considered in the presence of residual thermal pion *** self-consistently solving the coupled equations for the condensates,the thermal pion distributions,and the s... 详细信息

关键词： neutral Chiral thermal

Equal-Time Transport Theory for Scalar Particles with Width

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Chinese Physics Letters 1999年第5期16卷 330-332页

作者： ZHUANG Peng-fei rolf Fauser Department of Physics Tsinghua UniversityBeijing 100084 Theoretical Physics Group Gesellschaft für Schwerionenforschang GSID-64291 DarmstadtGermany

For a Ф^(4)-theory the equal-time transport theory is derived with a collision term by including 4-point *** aћexpansion a set of coupled equations is presented for the first three energy moments of the Wigner functions and the 4-point *** presence of 4-point *** limit n→0 is *** the collision term leads already in this limit to particles with width.

关键词： limit collision theory

On the Circulant and Aperiodic Models of Deconvolution

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Journal of Systems Engineering and Electronics 1995年第1期6卷 16-24页

作者： Zou Mouyan & rolf Unbehauen Zou Mouyan is on leave from the Institute of Electronics Academia Sinica Beijing China Lehrstuhl fur Allgemeine und Theoretische Elektrotechnik Universitat Erlangen-Nurnberg 91058 Erlangen Germany

The popularly used circulant matrix model of deconvolution is mostly heavily ill-posed or singular and it is not suitable to many blind deconvolution problems. The aperiodic matrix model can improve the condition number of deconvolution problems and its accommodation is much wider than the circulant one's. This paper discusses a comparison of the two models including their ill-posedness, the rationality of the approximation by the models, and their computational efficiency. The comparison shows that the aperiodic model is promising in the development of new restoration algorithms.

关键词： circulant matrix model aperiodic model deconvolution

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Uptake of U-and Th-series radionuclides by cereal crops in Upper Egypt

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Nuclear Science and Techniques 2009年第2期20卷 99-105页

作者： SHABAN Harb rolf Michel Center for Radiation Protection and Radioecology Hanover University(ZSR) Physics Department Faculty of ScienceSouth Valley University

The main aim of this study is to determine the activity concentrations of uranium series and thorium series radionuclide in crops cultivated in Upper *** types of cereal crops were collected from local markets and analyzed by γ-ray *** mean activity concentrations of the natural radionuclides 238U,226Ra and 232Th were 0.67,1.27 and 0.56 Bq·kg-1,*** annual effective doses from these radionuclides were estimated for different age groups.

关键词：天然放射性核素谷类作物埃及 U型吸收 226Ra 作物栽培有效剂量

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Digital earth applications in the twenty-first century

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International Journal of Digital Earth 2014年第7期7卷 511-515页

作者： rolf Ade By Yola Georgiadou Faculty of Geo-Information Science and Earth Observation(ITC) University of TwenteEnschedeThe Netherlands

In these early years of the twenty-first century,we must look at how the truly cross-cutting information technology supports other innovations,and how it will funda-mentally change the information positions of government,private sector and the scientific domain as well as the *** those positions,location will be a prominent linking *** classical top-down system architectures of information exchange will be diluted by peer-to-peer and bottom-up channels,forcing us to rethink their *** should not only focus on better architectures,but need to attend to a different economy of information exchange,in which the‘client’is not only the information sink,but has become an important source as *** laws of this rising‘infoconomy’have yet to be settled *** special issue on‘Digital Earth Applications:Technological design and organizational strategies’brings together a number of papers that shed light on this future information ecosystem in which location-specific information will be exchanged between *** introduction presents a framework that combines geoinformation streams and organisations brokering between government,science,private sector and *** novel framework helps us improve the appreciation of those papers.

关键词： geoinformation governance information architecture digital earth