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Extended Quality Characterization of Grid Connected PV Inverters

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电力电子技术 2013年第3期47卷 11-14,20页

作者： Georg Lauss Roland Bruendlinger Benoit Bletterie Christoph Mayr ait austrian institute of technology Giefinggasse 2 1210 Vienna Austria

The overall performance of photovoltaic （PV） inverter imphes many different technical *** of the key criterias is based on the measurement of the conversion and the maximum power point tracking （MPPT） efficiency and its applicable evaluation in *** work has been done in the last few years to formulate applicable standards for measuring static and dynamic efficiencies *** that,this work is presenting on novel methods of analysis on non-trivial system characteristics impacting the final evaluation on the overall performance of the PV *** elaborated testing procedures for complex system behavior under highly nonlinear conditions （unintentional partial shading, mismatching of DC strings） are explained and *** the help of experimental results, the exclusive impact on the overall efficiency is illustrated and helpful statements are given on the resulting technical characteristics of MPP strategies.

关键词： grid connected photovoltaic inverter conversion efficiency maximum power point tracking quality

China's landscape in oncology drug research:perspectives from research collaboration networks

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Chinese Journal of Cancer Research 2015年第2期27卷 138-147页

作者： Han You Jingyun Ni Michael Barber Thomas Scherngell Yuanjia Hu State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of Macao Innovation Systems Department AIT Austrian Institute of Technology

Objective： Better understanding of China＇s landscape in oncology drug research is of great significance for discovering anti-cancer drugs in future. This article differs from previous studies by focusing on Chinese oncology drug research communities in co-publication networks at the institutional level. Moreover, this research aims to explore structures and behaviors of relevant research units by thematic community analysis and to address policy recommendations. Methods： This research used social network analysis to define an institutions network and to identify a community network which is characterized by thematic content. Results： A total of 675 sample articles from 2008 through 2012 were retrieved from the Science Citation Index Expanded （SCIE） database of Web of Science, and top institutions and institutional pairs are highlighted for further discussion. Meanwhile, this study revealed that institutions based in the Chinese mainland are located in a relatively central position, Taiwan＇s institutions are closely assembled on the side, and Hong Kong＇s units located in the middle of the Chinese mainland＇s and Taiwan＇s. Spatial division and institutional hierarchy are still critical barriers to research collaboration in the field of anti-cancer drugs in China. In addition, the communities focusing on hot research areas show the higher nodal degree, whereas communities giving more attention to rare research subjects are relatively marginalized to the periphery of network. Conclusions= This paper offers policy recommendations to accelerate cross-regional cooperation, such as through developing information technology and increasing investment. The brokers should focus more on outreach to other institutions. Finally, participation in topics of common interest is conducive to improved efficiency in research and development （R＆D） resource allocation.

关键词： Anti-cancer pharmaceuticals publications research collaboration networks thematic analysis

Human induced pluripotent stem cell based in vitro models of the blood-brain barrier： the future standard？

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Neural Regeneration Research 2017年第10期12卷 1607-1609页

作者： Winfried Neuhaus ait–austrian institute of technology GmbH Competence Center Health and BioresourcesUnit Molecular DiagnosticsMuthgasse 111190 ViennaAustria

There is an urgent and tremendous need for human dis- ease models in drug development in order to improve pre- clinical predictability. In the case of brain disorders drugs have to cross the blood-brain barrier （BBB） to enter the central nervous system （CNS）. It was estimated that more than 95% of the drugs cannot cross the BBB.

关键词： Human induced pluripotent stem cell based in vitro models of the blood-brain barrier:the future standard BBB

Microstructure and Mechanical Properties of Cold Metal Transfer Welding Similar and Dissimilar Aluminum Alloys

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Acta Metallurgica Sinica(English Letters) 2015年第6期28卷 715-724页

作者： Ahmed Elrefaey Nigel G.Ross LKR Leichtmetallkompetenzzentrum Ranshofen GmbH Austrian Institute of Technology

Integrating structures made from aluminum alloys in automotive industry requires a large amount of joining. As a consequence, the properties of the joints have a significant influence on the overall performance of the whole structure. Robot cold metal transfer welding is a relatively new joining technique and has been used in this work to join 6082-T4 and 5182-O aluminum alloy sheets by using ER5356 and ER4043 filler metals. Microstructure characterization was performed by optical microscopy and energy dispersive X-ray spectroscopy, and the mechanical properties were measured by tensile and hardness tests. A correlation is made between welding variables, mechanical properties and the microstructure of welded joints. Results indicate that robot cold metal transfer welding provides good joint efficiency with high welding speed, good tensile strength, and ductility. Owing to the low heat input of robot cold metal transfer welding process, the heat affected zone microstructure was quite similar to base metals, and weld metal microstructure was the controlling factor of joint efficiency. The best performing were the 5182/5182 joints welded with ER5356 and these had mechanical property coefficients of 100%, 98%, and 85% for yield strength, ultimate tensile strength, and elongation, respectively.

关键词： Aluminum CMT Welding Microstructure Tensile property

Complete coverage of reduced graphene oxide on silicon dioxide substrates

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Chinese Physics B 2014年第8期23卷 143-146页

作者： Huang Jingfeng Melanie Larisika Chen Hu Steve Faulkner Myra A.Nimmo Christoph Nowak Alfred Tok Iing Yoong School of Materials Science and Engineering Nanyang Technological University institute for Sports Research Nanyang Technological University austrian institute of technology (ait) GmbH Center for Biomimetic Sensor Science School of Sport Exercise and Health Sciences Loughborough University

Reduced graphene oxide （RGO） has the advantage of an aqueous and industrial-scale production route. No other approaches can rival the RGO field effect transistor platform in terms of cost （〈US$1） and portability （millimetre scale）. However the large deviations in the electrical resistivity of this fabricated material prevent it from being used widely. After an ethanol chemical vapor deposition （CVD） post-treatment to graphene oxide with ethanol, carbon islets are deposited preferentially at the edges of existing flakes. With a 2-h treatment, the standard deviation in electrical resistance of the treated chips can be reduced by 99.95%. Thus this process could enable RGO to be used in practical electronic devices.

关键词： graphene oxide reduced graphene oxide graphene growth field effect transistor

The Immunome of Colon Cancer: Functional In Silico Analysis of Antigenic Proteins Deduced from IgG Microarray Pro?ling

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Genomics, Proteomics & Bioinformatics 2018年第1期16卷 73-84页

作者： Johana A. Luna Coronell Khulan Sergelen Philipp Hofe Istvan Gyurjan Stefanie Brezina Peter Hettegger Gernot Leeb Karl Mach Andrea Gsur Andreas Weinhausel Molecular Diagnostics AIT - Austrian Institute of Technology A-1190 Vienna Austria Department of Medicine I Institute of Cancer Research Comprehensive Cancer Center Medical University Vienna A-1090 Vienna Austria Hospital Oberpullendorf A-7350 Oberpullendorf Austria

Characterization of the colon cancer immunome and its autoantibody signature from differentially-reactive antigens （DIRAGs） could provide insights into aberrant cellular mechanisms or enriched networks associated with diseases. The purpose of this study was to characterize the antibody profile of plasma samples from 32 colorectal cancer （CRC） patients and 32 controls using proteins isolated from 15,417 human cDNA expression clones on microarrays. 671 unique DIRAGs were identified and 632 were more highly reactive in CRC samples. Bioinformatics analyses reveal that compared to control samples, the immunoproteomic IgG profiling of CRC samples is mainly associated with cell death, survival, and proliferation pathways, especially proteins involved in EIF2and mTOR signaling. Ribosomal proteins （e.g., RPL7, RPL22, and RPL27A） and CRC-related genes such as APC, AXIN1, E2F4, MSH2, PMS2, and TP53 were highly enriched. In addition, dif- ferential pathways were observed between the CRC and control samples. Furthermore, 103 DIR- AGs were reported in the SEREX antigen database, demonstrating our ability to identify known and new reactive antigens. We also found an overlap of 7 antigens with 48 ＂CRC genes.＂ These data indicate that immunomies profiling on protein mieroarrays is able to reveal the complexity of immune responses in cancerous diseases and faithfully reflects the underlying pathology.

关键词： Autoantibody tumorbiomarker Cancer immunology Colorectal cancer Immunomics Protein microarray

Extension of the Code COCOSYS to a Dispersion Code for Smoke and Carbon Monoxide

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Journal of Energy and Power Engineering 2011年第3期5卷 215-221页

作者： G. Sdouz R. Mayrhofer Health and Environment Department AIT Austrian Institute of Technology GmbH A-2444 Seibersdorf Austria

The code COCOSYS （Containment Code System） was developed by GRS （Gesellschaft fur Anlagen-und Reaktorsicherheit） in Germany to simulate processes and nuclear plant states during severe accidents in the containments of light water reactors. It contains several physical models, especially a module for aerosol behaviour. The goal of this work was to extend COCOSYS for applications in more general geometries mainly for complex public buildings. For the application in public buildings, models for air condition systems and different boundary conditions according to different environments were developed. The principal application of the extended code COCOSYS is in the area of emergency situations especially in the simulation for carbon monoxide and smoke dispersion. As first achievement realistic fire emergency scenarios in the Vienna General Hospital （AKH） could be simulated. The results of the simulation can be used for the development of fire emergency training.

关键词： Dispersion calculation emergency situation smoke carbon monoxide.

Influence of Gravitational Waves on Circular Moving Particles

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Journal of Modern Physics 2018年第4期9卷 651-668页

作者： Manfried Faber Martin Suda Atominstitut Technical University Vienna and AIT Austrian Institute of Technology GmbH Vienna Austria

We investigate the influence of a gravitational wave background on particles in circular motion. We are especially interested in waves leading to stationary orbits. This consideration is limited to circular orbits perpendicular to the incidence direction. As a main result of our calculation, we obtain in addition to the well-known alteration of the radial distance a time dependent correction term for the phase modifying the circular motion of the particle. A background of gravitational waves creates some kind of uncertainty.

关键词： Gravitational Waves Circular Orbits Linearized Einstein Equations

Software for Small-scale Robotics: A Review

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International Journal of Automation and computing 2018年第5期15卷 515-524页

作者： Tobias Tiemerding Sergej Fatikow Department of Computing Science Division Microrobotics and Control Engineering (AMiR) University of Oldenburg OFFIS–institute for Information technology R&D Division Automation and Integration Technology (AIT)

In recent years, a large number of relatively advanced and often ready-to-use robotic hardware components and systems have been developed for small-scale use. As these tools are mature, there is now a shift towards advanced applications. These often require automation and demand reliability, efficiency and decisional autonomy. New software tools and algorithms for artificial intelligence（AI） and machine learning（ML） can help here. However, since there are many software-based control approaches for small-scale robotics, it is rather unclear how these can be integrated and which approach may be used as a starting point. Therefore, this paper attempts to shed light on existing approaches with their advantages and disadvantages compared to established requirements. For this purpose, a survey was conducted in the target group. The software categories presented include vendor-provided software, robotic software frameworks（RSF）, scientific software and in-house developed software（IHDS）. Typical representatives for each category are described in detail, including Smar Act precision tool commander, Math Works Matlab and national instruments Lab VIEW, as well as the robot operating system（ROS）. The identified software categories and their representatives are rated for end user satisfaction based on functional and non-functional requirements, recommendations and learning curves. The paper concludes with a recommendation of ROS as a basis for future work.

关键词： Robotic control software engineering micro/nano robotics artificial intelligence (AI) machine learning (ML) open