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Hydrological monitoring and seasonal forecasting:Progress and perspectives

Journal of Geographical sciences 2016年第7期26卷 904-920页

作者：汤秋鸿张学君段青云黄诗峰袁星崔惠娟李哲刘星才 Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research CAS University of Chinese Academy of Sciences State Key Laboratory of Earth Surface Processes and Resource Ecology College of Global Change and Earth System Science Beijing Normal University Remote Sensing Technology Application Center China Institute of Water Resources and Hydropower Research RCE-TEA Institute of Atmospheric Physics CAS Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research CAS

Hydrological monitoring and seasonal forecasting is an active research field because of its potential applications in hydrological risk assessment, preparedness and mitigation. In recent decades, developments in ground and satellite measurements have made the hydrometeorological information readily available, and advances in information technology have facilitated the data analysis in a real-time manner. New progress in climate research and modeling has enabled the prediction of seasonal climate with reasonable accuracy and increased resolution. These emerging techniques and advances have enabled more timely acquisition of accurate hydrological fluxes and status, and earlier warning of extreme hydrological events such as droughts and floods. This paper gives current state-of-the-art understanding of the uncertainties in hydrological monitoring and forecasting, reviews the efforts and progress in operational hydrological monitoring system assisted by observations from various sources and experimental seasonal hydrological forecasting, and briefly introduces the current monitoring and forecasting practices in China. The grand challenges and perspectives for the near future are also discussed, including acquiring and extracting reliable information for monitoring and forecasting, predicting realistic hydrological fluxes and states in the river basin being significantly altered by human activity, and filling the gap between numerical models and the end user. We highlight the importance of understanding the needs of the operational water management and the priority to transfer research knowledge to decision-makers.

关键词： hydrological monitoring hydrological forecasting uncertainty modeling remote sensing climate model

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The research of the evaluation system towards a core enterprise’s network capability in the industrial technology alliance

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AIP Conference Proceedings 2017年第1期1839卷

作者： Guangshi Yan Xuelian Tian Xue Shen Yue You 1School of management Heilongjiang institute of science and technology Harbin 150027 China 2School of Economics and Management Beihang University Beijing 100191 China 3Key laboratory of urban run emergency security simulation technology Beijing 100191 China 4National Engineering Research Center for Science and Technology Resources sharing Service Beijing 100191 China

The social network theory is introduced for the industrial technology alliance based on the actual needs of the development of the industrial technology alliance. Through discussing the influence of the core enterprise network capacity on alliance performance, this article establishes evaluation system and index model of core enterprise network ability. We also evaluate and analyze the network capacity of core enterprise by fuzzy comprehensive evaluation method. So, the evaluation method is very important and full of practical value with a new research vision.

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Development of database of real-world diesel vehicle emission factors for China

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Journal of Environmental sciences 2015年第5期27卷 209-220页

作者： Xianbao Shen Zhiliang Yao Qiang Zhang David Vance Wagner Hong Huo Yingzhi Zhang Bo Zheng Kebin He State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University School of Food and Chemical Engineering Beijing Technology and Business University Ministry of Education Key Laboratory for Earth System Modeling Center for Earth System Science Tsinghua University International Council on Clean Transportation (ICCT) Institute of Energy Environment and Economy Tsinghua University State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University

A database of real-world diesel vehicle emission factors, based on type and technology, has been developed following tests on more than 300 diesel vehicles in China using a portable emission measurement system. The database provides better understanding of diesel vehicle emissions under actual driving conditions. We found that although new regulations have reduced real-world emission levels of diesel trucks and buses significantly for most pollutants in China, NOx emissions have been inadequately controlled by the current standards, especially for diesel buses, because of bad driving conditions in the real world. We also compared the emission factors in the database with those calculated by emission factor models and used in inventory studies. The emission factors derived from COPERT（Computer Programmer to calculate Emissions from Road Transport） and MOBILE may both underestimate real emission factors, whereas the updated COPERT and PART5（Highway Vehicle Particulate Emission Modeling Software） models may overestimate emission factors in China. Real-world measurement results and emission factors used in recent emission inventory studies are inconsistent,which has led to inaccurate estimates of emissions from diesel trucks and buses over recent years. This suggests that emission factors derived from European or US-based models will not truly represent real-world emissions in China. Therefore, it is useful and necessary to conduct systematic real-world measurements of vehicle emissions in China in order to obtain the optimum inputs for emission inventory models.

关键词： Diesel vehicle Emission factor Portable emission measurement system Database China

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The Large Area Detector onboard the eXTP mission

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Proceedings of SPIE - The International Society for Optical Engineering 2018年 10699卷

作者： Feroci, Marco Ahangarianabhari, Mahdi Ambrosi, Giovanni Ambrosino, Filippo Argan, Andrea Barbera, Marco Bayer, Joerg Bellutti, Pierluigi Bertucci, Bruna Bertuccio, Giuseppe Borghi, Giacomo Bozzo, Enrico Cadeaux, Franck Campana, Riccardo Ceraudo, Francesco Chen, Tianxiang Cirrincione, Daniela De Rosa, Alessandra Del Monte, Ettore DI Cosimo, Sergio DIebold, Sebastian Evangelista, Yuri Fan, Qingmei Favre, Yannick Ficorella, Francesco Fuschino, Fabio Gevin, Olivier Grassi, Marco Hong, Bin Mao, Hanqi Karas, Vladimir Kennedy, Tom Labanti, Claudio Limousin, Olivier Lo Cicero, Ugo Lu, Fangjun Luo, Tao Malcovati, Piero Martindale, Adrian Meuris, Aline Michalska, Malgrozata Morbidini, Alfredo Muleri, Fabio Orleanski, Piotr Paltani, Stephane Pan, Teng Perinati, Emanuele Picciotto, Antonino Pohl, Martin Rashvskaia, Irina Santangelo, Andrea Schanne, Stéphane Skup, Kornad Svoboda, Jiri Tenzer, Chris Vacchi, Andrea Walton, Dave Winter, Berend Wu, Xin Xu, Yupeng Zampa, Gianluigi Zampa, Nicola Zane, Silvia Zdziarski, Andrzej Zhang, Long Zhang, Shu Zhang, Shuangnan Zhang, Wenda Zhang, Xiaoli Zhou, Yupeng Zorzi, Nicola INAF Istituto di Astrofisica e Planetologia Spaziali Via Fosso del Cavaliere 100 Rome00133 Italy INFN Sezione Roma Tor Vergata Via della Ricerca Scientifica Rome00133 Italy Politecnico di Milano Polo di Como Via Anzani 41 Como Italy INFN Sezione di Perugia Via Alessandro Pascoli 23c Perugia06123 Italy Università di Palermo Dipartimento di Fisica e Chmica Via Archirafi 36 Palermo90123 Italy INAF Osservatorio Astronomico di Palermo Piazza del Parlamento 1 Palermo90134 Italy Institut fur Astronomie und Astrophysik Eberhard Karls Universitat Tuebingen72076 Germany Fondazione Bruno Kessler Via Sommarive Povo Trento38123 Italy University of Perugia Dip. Fisica e Geologia P.zza Università Perugia06123 Italy Department of Astronomy University of Geneva Chemin d'Ecogia 16 Versoix1290 Switzerland Department of Nuclear and Particle Physics University of Geneva CH-1211 Switzerland INAF Osservatorio di Astrofisica e Scienza Dello Spazio di Bologna Via P. Gobetti 101 Bologna Italy CEA Paris-Saclay DRF/IRFU Gif sur Yvette91191 France Key Laboratory for Particle Astrophysics Institute of High Energy Physics CAS Beijing100049 China University of Udine Via delle Scienze 206 Udine33100 Italy University of Pavia Department of Electrical Computer and Biomedical Engineering Via Ferrata 5 Pavia27100 Italy North Night Vision Technology Co. Ltd Nanjing211106 China Astronomical Institute Czech Academy of Sciences Bocni II 1401 PragueCZ-14100 Czech Republic Mullard Space Science Laboratory UCL Holmbury St Mary Dorking SurreyRH56NT United Kingdom Space Research Centre Department of Physics and Astronomy University of Leicester LeicesterLE17RH United Kingdom Space Research Center Polish Academy of Sciences Bartycka 18a Warszawa00-716 Poland TIFPA Istituto Nazionale di Fisica Nucleare Via Sommarive 14 Povo Trento38123 Italy Nicolaus Copernicus Astronomical Center Polish Academy of Sciences Bartycka 18 WarszawaPL-00-716 Poland INFN

ISBN: (纸本)9781510619517

The eXTP (enhanced X-ray Timing and Polarimetry) mission is a major project of the Chinese Academy of sciences (CAS) and China National space Administration (CNSA) currently performing an extended phase A study and proposed for a launch by 2025 in a low-earth orbit. The eXTP scientific payload envisages a suite of instruments (Spectroscopy Focusing Array, Polarimetry Focusing Array, Large Area Detector and Wide Field Monitor) offering unprecedented simultaneous wide-band X-ray spectral, timing and polarimetry sensitivity. A large European consortium is contributing to the eXTP study and it is expected to provide key hardware elements, including a Large Area Detector (LAD). The LAD instrument for eXTP is based on the design originally proposed for the LOFT mission within the ESA context. The eXTP/LAD envisages a deployed 3.4 m2 effective area in the 2-30 keV energy range, achieved through the technology of the large-area Silicon Drift Detectors - offering a spectral resolution of up to 200 eV FWHM at 6 keV - and of capillary plate collimators - limiting the field of view to about 1 degree. In this paper we provide an overview of the LAD instrument design, including new elements with respect to the earlier LOFT configuration. © 2018 SPIE.

关键词： X ray detectors Buildings Earth (planet) Ellipsometry Gamma rays Orbits Polarimeters Silicon detectors space telescopes X rays Capillary plate Chinese Academy of sciences Large area detector Scientific payloads Silicon Drift Detector space administration Timing X ray astronomy

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Detection and characterisation of oscillating red giants: first results from the TESS satellite

arXiv

引用

arXiv 2019年

作者： Aguirre, Víctor Silva Stello, Dennis Stokholm, Amalie Mosumgaard, Jakob R. Ball, Warrick H. Basu, Sarbani Bossini, Diego Bugnet, Lisa Buzasi, Derek Campante, Tiago L. Carboneau, Lindsey Chaplin, William J. Corsaro, Enrico Davies, Guy R. Elsworth, Yvonne García, Rafael A. Gaulme, Patrick Hall, Oliver J. Handberg, Rasmus Hon, Marc Kallinger, Thomas Kang, Liu Lund, Mikkel N. Mathur, Savita Mints, Alexey Mosser, Benoit Orhan, Zeynep Çelik Rodrigues, Thaíse S. Vrard, Mathieu Yıldız, Mutlu Zinn, Joel C. Örtel, Sibel Beck, Paul G. Bell, Keaton J. Guo, Zhao Jiang, Chen Kuszlewicz, James S. Kuehn, Charles A. Li, Tanda Lundkvist, Mia S. Pinsonneault, Marc Tayar, Jamie Cunha, Margarida S. Hekker, Saskia Huber, Daniel Miglio, Andrea Monteiro, Mario J.P.F.G. Slumstrup, Ditte Winther, Mark L. Angelou, George Benomar, Othman Bódi, Attila de Moura, Bruno L. Deheuvels, Sébastien Derekas, Aliz Di Mauro, Maria Pia Dupret, Marc-Antoine Jiménez, Antonio Lebreton, Yveline Matthews, Jaymie Nardetto, Nicolas do Nascimento, Jose D. Pereira, Filipe Rodríguez Díaz, Luisa F. Serenelli, Aldo M. Spitoni, Emanuele Stonkutė, Edita Suárez, Juan Carlos Szabó, Robert van Eylen, Vincent Ventura, Rita Verma, Kuldeep Weiss, Achim Wu, Tao Barclay, Thomas Christensen-Dalsgaard, Jørgen Jenkins, Jon M. Kjeldsen, Hans Ricker, George R. Seager, Sara Vanderspek, Roland Department of Physics and Astronomy Aarhus University Ny Munkegade 120 Aarhus C8000 Denmark School of Physics University of New South Wales SydneyNSW2052 Australia School of Physics University of Sydney NSW2006 Australia School of Physics and Astronomy University of Birmingham BirminghamB15 2TT United Kingdom Department of Astronomy Yale University New HaveCT06520 United States Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Rua das Estrelas Porto4150-762 Portugal IRFU CEA Université Paris-Saclay Gif-sur-YvetteF-91191 France AIM CEA CNRS Université Paris-Saclay Université Paris Diderot Sorbonne Paris Cité Gif-sur-YvetteF-91191 France Dept. of Chemistry and Physics Florida Gulf Coast University 10501 FGCU Blvd. S. Fort MyersFL33965 United States Departamento de Física e Astronomia Faculdade de Ciências da Universidade do Porto Rua do Campo Alegre s/n Porto4169-007 Portugal INAF Osservatorio Astrofisico di Catania Via S. Sofia 78 Catania95123 Italy Max Planck Institute for Solar System Research Justus-von-Liebig Weg 3 GöttingenD-37077 Germany Department of Astronomy New Mexico State University P.O. Box 30001 MSC 4500 Las CrucesNM88003-8001 United States Institut für Astrophysik Universität Wien Türkenschanzstrasse 17 Vienna1180 Austria Department of Astronomy Beijing Normal University Beijing100875 China Instituto de Astrofísica de Canarias E-38200 La Laguna Tenerife Spain Departamento de Astrofísica Universidad de La Laguna La Laguna TenerifeE-38206 Spain An der Sternwarte 16 Potsdam14482 Germany LESIA Observatoire de Paris Université PSL CNRS Sorbonne Université Université de Paris Meudon92195 France Department of Astronomy and Space Sciences Science Faculty Ege University Bornova Izmir35100 Turkey Osservatorio Astronomico di Padova – INAF Vicolo dell’Osservatorio 5 PadovaI-35122 Italy Department of Astronomy Ohio State University 140 West 18th Avenue ColumbusOH43210 United S

Since the onset of the ‘space revolution’ of high-precision high-cadence photometry, asteroseismology has been demonstrated as a powerful tool for informing Galactic archaeology investigations. The launch of the NASA TESS mission has enabled seismic-based inferences to go full sky – providing a clear advantage for large ensemble studies of the different Milky Way components. Here we demonstrate its potential for investigating the Galaxy by carrying out the first asteroseismic ensemble study of red giant stars observed by TESS. We use a sample of 25 stars for which we measure their global asteroseimic observables and estimate their fundamental stellar properties, such as radius, mass, and age. Significant improvements are seen in the uncertainties of our estimates when combining seismic observables from TESS with astrometric measurements from the Gaia mission compared to when the seismology and astrometry are applied separately. Specifically, when combined we show that stellar radii can be determined to a precision of a few percent, masses to 5-10% and ages to the 20% level. This is comparable to the precision typically obtained using end-of-mission Kepler data. Copyright © 2019, The Authors. All rights reserved.

关键词： Seismology

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Ultrasensitive denoising imaging

Ultrasensitive denoising imaging

引用

JSAP-OSA Joint Symposia 2015

作者： Zhai, Guang-Jie Yu, Wen-Kai Zhao, Qing Key Laboratory of Electronics and Information Technology for Space System Center for Space Science and Applied Research Chinese Academy of Sciences Beijing100190 China College of Physics Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9784863485419

Traditional methods in remote spectral imaging usually cannot obtain images and spectra simultaneously, either rely on scene raster scanning or use an array sensor. Thus it is inevitable that the flux will be distributed evenly to the pixel dimension, resulting in a decline in the imaging sensitivity. To solve the problems, we proposed a compressive spectral imaging scheme with dual spatial light modulation. With the information of spectra and space both compressed, the spectral image of a colored object can be obtained by a single-photon point detector. Objects with both continuous and discrete spectrum are used to demonstrate the performance, which shows wide-spectrum and high efficiency in spectral imaging. Since this approach is based on the technique of single-pixel imaging, we have found a correlation between the samplings in both reflection arms of the digital micro-mirror, in view of which we propose a complementary way of double-pixel compressive imaging on denoising. In a telescopic system, this method can be used to retrieve images of a target with 20 cm resolution, obtaining an image in a higher quality of 1~2 orders than that acquired by the conventional single-pixel imaging scheme under the same sampling rate. Our results have shown that the above method has strong ability in producing high-quality images with fewer measurements, which leads to a broader prospect of applications in the remote-sensing area. © 2015 OSA - The Optical Society. All rights reserved.

关键词： Computational Imaging

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The enhanced X-ray Timing and Polarimetry mission- eXTP

arXiv

引用

arXiv 2018年

作者： Zhang, Shuang-Nan Santangelo, Andrea Feroci, Marco Xu, Yupeng Lu, Fangjun Chen, Yong Feng, Hua Zhang, Shu Brandt, Søren Hernanz, Margarita Baldini, Luca Bozzo, Enrico Campana, Riccardo de Rosa, Alessandra Dong, Yongwei Evangelista, Yuri Karas, Vladimir Meidinger, Norbert Meuris, Aline Nandra, Kirpal Pan, Teng Pareschi, Giovanni Orleanski, Piotr Huang, Qiushi Schanne, Stephane Sironi, Giorgia Spiga, Daniele Svoboda, Jiri Tagliaferri, Gianpiero Tenzer, Christoph Vacchi, Andrea Zane, Silvia Walton, Dave Wang, Zhanshan Winter, Berend Wu, Xin in’t Zand, Jean J.M. Ahangarianabhari, Mahdi Ambrosi, Giovanni Ambrosino, Filippo Barbera, Marco Basso, Stefano Bayer, Jörg Bellazzini, Ronaldo Bellutti, Pierluigi Bertucci, Bruna Bertuccio, Giuseppe Borghi, Giacomo Cao, Xuelei Cadoux, Franck Campana, Riccardo Ceraudo, Francesco Chen, Tianxiang Chen, Yupeng Chevenez, Jerome Civitani, Marta Cui, Wei Cui, Weiwei Dauser, Thomas Monte, Ettore Del Cosimo, Sergio Di Diebold, Sebastian Doroshenko, Victor Dovciak, Michal Du, Yuanyuan Ducci, Lorenzo Fan, Qingmei Favre, Yannick Fuschino, Fabio Gálvez, José Luis Gao, Min Ge, Mingyu Gevin, Olivier Grassi, Marco Gu, Quanying Gu, Yudong Han, Dawei Hong, Bin Hu, Wei Ji, Long Jia, Shumei Jiang, Weichun Kennedy, Thomas Kreykenbohm, Ingo Kuvvetli, Irfan Labanti, Claudio Latronico, Luca Li, Gang Li, Maoshun Li, Xian Li, Wei Li, Zhengwei Limousin, Olivier Liu, Hongwei Liu, Xiaojing Lu, Bo Luo, Tao Macera, Daniele Malcovati, Piero Martindale, Adrian Michalska, Malgorzata Meng, Bin Minuti, Massimo Morbidini, Alfredo Muleri, Fabio Paltani, Stephane Perinati, Emanuele Picciotto, Antonino Piemonte, Claudio Qu, Jinlu Rachevski, Alexandre Rashevskaya, Irina Rodriguez, Jerome Schanz, Thomas Shen, Zhengxiang Sheng, Lizhi Song, Jiangbo Song, Liming Sgro, Carmelo Sun, Liang Tan, Ying Uttley, Phil Wang, Bo Wang, Dianlong Wang, Guofeng Wang, Juan Wang, Langping Wang, Yusa Watts, Anna L. Wen, Xiangyang Wilms, Jörn Xiong, Shaolin Yang, Jiawei Yang, Sheng Yang, Yanji Yu, Nian Zhang, Wenda Zampa, Gianluigi Zampa, Ni Key Laboratory for Particle Astrophysics Institute of High Energy Physics Beijing100049 China Institut für Astronomie und Astrophysik Eberhard Karls Universität Tübingen72076 Germany INAF – Istituto di Astrofisica e Planetologia Spaziali Via Fosso del Cavaliere 100 RomaI-00133 Italy INFN – Roma Tor Vergata Via della Ricerca Scientifica 1 RomaI-00133 Italy Department of Engineering Physics Center for Astrophysics Tsinghua University Beijing100084 China Department of Astronomy University of Geneva chemin d’Ecogia 16 Versoix1290 Switzerland Department of Nuclear and Particle Physics University of Geneva CH-1211 Switzerland Astronomical Institute Czech Academy of Sciences Prague14100 Czech Republic Anton Pannekoek Institute for Astronomy University of Amsterdam Science Park 904 Amsterdam1098 XH Netherlands CEA Paris-Saclay IRFU Gif sur YvetteF-91191 France SRON Netherlands Institute for Space Research Sorbonnelaan 2 Utrecht3584 CA Netherlands 08193 Spain Barcelona08034 Spain Mullard Space Science Laboratory University College London Holmbury St Mary Dorking SurreyRH56NT United Kingdom Department of Physics and Astronomy University of Leicester LeicesterLE17RH United Kingdom Max Planck Institute for Extraterrestrial Physics Giessenbachstr. 1 Garching85748 Germany Center for Precision Engineering Harbin Institute of Technology Harbin150001 China State key laboratory of advanced welding and joining Harbin Institute of Technology Harbin150006 China School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision Mechanics CAS Xi’an710119 China Beijing Institute of Spacecraft System Engineering CAST Beijing10094 China Key Laboratory of Advanced Material Microstructure of Education Ministry of China Institute of Precision Optical Engineering School of Physics Science and Engineering Tongji University Shanghai20

In this paper we present the enhanced X-ray Timing and Polarimetry mission. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources. The paper provides a detailed description of: 1) The technological and technical aspects, and the expected performance of the instruments of the scientific payload;2) The elements and functions of the mission, from the spacecraft to the ground segment. Copyright © 2018, The Authors. All rights reserved.

关键词： Timing circuits

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An efficient storage technology for object-based distributed storage system

International Journal of Control and Automation

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International Journal of Control and Automation 2015年第11期8卷 337-348页

作者： Zhang, Jilin Su, Yucheng Wan, Jian Zhou, Li Wang, Jue Zhang, Lei College of Electrical Engineering Zhejiang University Hangzhou China School of Computer Science and Technology Hangzhou Dianzi University Hangzhou China Key Laboratory of Complex Systems Modeling and Simulation Ministry of Education China Supercomputing Center of Computer Network Information Center Chinese Academy of Sciences Beijing China Computer Science Department Beijing University of Civil Engineering and Architecture Beijing China

There have two effective ways to improve the overall efficiency of the object-based distributed storage system, one is network caching technology and the other is metadata server cluster load balancing strategy. Under the heterogeneous storage environments, object-based distributed file system face the key challenge of lacking caching mechanism for the high-frequency access files, metadata server load imbalance also reduce the overall efficiency. To address these challenges, we discuss the design and implementation of an object-based distributed file storage caching system, and propose a weight-based metadata server cluster load balancing strategy. It effectively improve the metadata processing capacity. Based on the results, it demonstrated the feasibility and the efficiency of our methods. © 2015 SERSC.

关键词： Metadata

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Research and implementation of CDP disaster recovery system based on oracle

International Journal of Control and Automation

引用

International Journal of Control and Automation 2015年第11期8卷 325-336页

作者： Ren, Yongjian Ye, Jiaolong Zhang, Jilin Zhou, Li Wang, Jue Zhang, Lei School of Computer Science and Technology Hangzhou Dianzi University Hangzhou China Key Laboratory of Complex Systems Modeling and Simulation Ministry of Education China College of Electrical Engineering Zhejiang University Hangzhou China Supercomputing Center of Computer Network Information Center Chinese Academy of Sciences Beijing China Computer Science Department Beijing University of Civil Engineering and Architecture Beijing China

The OraCDP disaster recovery system uses CDP disaster recovery technology based on the combination of block level, combining with the communication coupling between the underlying I/O and Oracle database. The experimental results show that the OraCDP system can not only maintain the normal operation of the original system without any negative influence, but also guarantee the recovery of data and service at specific time quickly, fully and accurately. © 2015 SERSC.

关键词： Recovery

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A SLA-based scheduling approach for multi-tenant cloud simulation

A SLA-based scheduling approach for multi-tenant cloud simul...

引用

International Conference on Computer Supported Cooperative Work in Design

作者： Gongzhuang Peng Jiaxin Zhao Minghui Li Baocun Hou Heming Zhang National CIMS Engineering Research Center Tsinghua University Beijing China School of Mechanical Electronic & Information Engineering China University of Mining & Technology Beijing China Beijing Simulation Center Science and Technology on Space System Simulation Laboratory Beijing China

ISBN: (纸本)9781479985418

Modern product development becomes increasingly collaborative and parallel, which raises the need for sharing simulation resources in a multi-tenant simulation environment. However, the service requests and scheduling policies of tenants differ since system resources are shared by tenants. In order to deal with this issue, the framework of monitoring, detecting and scheduling system performance is proposed. As SLA is produced as the contract for negotiations between tenants and the service provider, the WS-Agreement specification is applied and improved to represent the service contents and qualities. Based on the SLA template, a dynamic resource distributing mechanism is realized. The Satisfaction Index is introduced into the scheduling of distributed resources, in which the weighted formula is determined by priorities. A case study has been undertaken and preliminary results show that the proposed solution can effectively support the cloud simulation and efficiently meet tenants' personal requirements.

关键词： Monitoring Processor scheduling Quality of service Context Scheduling Dynamics Collaboration

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