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Evaluation of the fine fraction content using electrical logging method

AIJ Journal of Technology and Design 2015年第48期21卷 557-562页

作者： Gao, Yuanhao Fujii, Mamoru Mochida, Yasuhide Takechi, Kotaro Adachi, Yukio Graduate School of Earth and Environmental Science Course of Earth and Environmental Science Tokai Univ. Japan Dept. of Architecture and Building Engineering Tokai Univ. Japan Dept. of Architecture and Urban Design Ritsumeikan Univ. Japan Ground Analysis Section Japan Home Shield Co. Ltd. Japan Control Systems Division Nitto Seiko Co. Ltd. Japan

SWS test is widely used as a research method to evaluate the residential sites. Advantage of SWS test is possible to evaluate the bearing capacity of residential sites. On the other hand, a disadvantage of SWS test is to determine soil and groundwater level. Suppose that if it is possible incorporate the determination method of the soil by electrical resistivity using SWS test holes, a lot of information will be gained. As an ideal way, the electrical logging method by the electrode to the SWS test hole, is effective. Based on the above background, it was cleared that the evaluation of fine fraction content of soil was possible by electrical resistivity from the laboratory test. And the estimation equation was completed. In this study, field experiments of the six sites were performed to confirm the accuracy of the estimation equation from the laboratory test.

关键词： Soils

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Parameter optimization of hydro turbine governor PID controller by chaotic improved PSO algorithm

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Energy Education Science and Technology Part A: Energy Science and Research 2014年第5期32卷 3949-3962页

作者： Chen, Gonggui Du, Yangwei Song, Peizhu Chongqing University of Posts and Telecommunications Key Laboratory of Industrial Wireless Network and Networked Control of Ministry of Education Chongqing China Chongqing University of Posts and Telecommunications Research Center on Complex Power System Analysis and Control Chongqing China Hubei Minzu University Dept. of Electrical Engineering Enshi China Hubei Energy Group Qiyueshan Wind Power Co Ltd Lichuan China

For overcoming the disadvantages of easily falling into local extremum and easily losing species diversity in traditional particle swarm optimization (PSO) algorithm, a cross improved PSO (IPSO) algorithm is proposed. In addition, in order to enhance the exploitation capacity of IPSO algorithm, it also makes use of chaotic sequence features which is called chaotic IPSO (CIPSO) algorithm. In present paper, mathematical structure model of hydro turbine governor is established, and the integral of absolute value of error as the minimum objective function is adopted to select particles. In order to obtain satisfactory transient dynamic characteristics in process of tuning of PID parameters, the square of output signal after PID tuning and the rise time are proposed to integrate into the augmented objective function, and in order to minimize overshoot to the greatest extent, the penalty mechanism is concerned. These algorithms are performed for optimized designs of governor PID parameters on hydro turbine. Several specific working conditions are modeled and CIPSO algorithm results are compared with those in PSO and IPSO algorithms. It comes out that the CIPSO algorithm has made some improvements whether in convergent speed or convergent accuracy in comparing with other two algorithms. © Sila Science. All rights reserved.

关键词： Governors

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Study on an improved Normal Form solution and reduced-order mode reconstruction in power system

Study on an improved Normal Form solution and reduced-order ...

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IEEE Region 10 International Conference TENCON

作者： Zhouqiang Wang Qi Huang Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control University of Electronic Science and Technology of China (UESTC) Chengdu Sichuan China Dept. of Electrical Engineering Sichuan Engineering Technical College (SCETC) Deyang Sichuan China University of Electronic Science and Technology of China Chengdu CN

ISBN: (纸本)9781479986422

With the polynomial vector space decomposition by using Normal Form theory, the normalized analytical solutions of modal resonance are derived, which solves that the traditional Normal Form solution cannot be easily obtained under resonant condition. Based on the solution, from the viewpoint of whether the modal interaction couples and resonates or not, the nonlinear terms are decomposed into four types, i.e., uncoupled nonresonant terms, coupled nonresonant terms, uncoupled resonant terms and coupled resonant terms. The corresponding modes are categorized into 5 types, i.e., single modes, uncoupled nonresonant modes, coupled nonresonant modes, uncoupled resonant modes and coupled resonant modes. A reduced-order mode reconstruction based on least square method to estimate the coefficients of higher-order interactional modes is proposed. This might be potentially a new approach to cope with the challenge from huge amount of higher-order modes in higher-order nonlinear analysis. Two case studies are presented to analyze the types and reconstructions of the nonlinear modes, 2nd- and 3rd- order terms, which verifies the effectiveness of the proposed approach.

关键词： Mathematical model Power system dynamics Yttrium Couplings Least squares methods Eigenvalues and eigenfunctions

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Author Correction: The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data

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Scientific data 2021年第1期8卷 72页

作者： Gilberto Pastorello Carlo Trotta Eleonora Canfora Housen Chu Danielle Christianson You-Wei Cheah Cristina Poindexter Jiquan Chen Abdelrahman Elbashandy Marty Humphrey Peter Isaac Diego Polidori Markus Reichstein Alessio Ribeca Catharine van Ingen Nicolas Vuichard Leiming Zhang Brian Amiro Christof Ammann M Altaf Arain Jonas Ardö Timothy Arkebauer Stefan K Arndt Nicola Arriga Marc Aubinet Mika Aurela Dennis Baldocchi Alan Barr Eric Beamesderfer Luca Belelli Marchesini Onil Bergeron Jason Beringer Christian Bernhofer Daniel Berveiller Dave Billesbach Thomas Andrew Black Peter D Blanken Gil Bohrer Julia Boike Paul V Bolstad Damien Bonal Jean-Marc Bonnefond David R Bowling Rosvel Bracho Jason Brodeur Christian Brümmer Nina Buchmann Benoit Burban Sean P Burns Pauline Buysse Peter Cale Mauro Cavagna Pierre Cellier Shiping Chen Isaac Chini Torben R Christensen James Cleverly Alessio Collalti Claudia Consalvo Bruce D Cook David Cook Carole Coursolle Edoardo Cremonese Peter S Curtis Ettore D'Andrea Humberto da Rocha Xiaoqin Dai Kenneth J Davis Bruno De Cinti Agnes de Grandcourt Anne De Ligne Raimundo C De Oliveira Nicolas Delpierre Ankur R Desai Carlos Marcelo Di Bella Paul di Tommasi Han Dolman Francisco Domingo Gang Dong Sabina Dore Pierpaolo Duce Eric Dufrêne Allison Dunn Jiří Dušek Derek Eamus Uwe Eichelmann Hatim Abdalla M ElKhidir Werner Eugster Cacilia M Ewenz Brent Ewers Daniela Famulari Silvano Fares Iris Feigenwinter Andrew Feitz Rasmus Fensholt Gianluca Filippa Marc Fischer John Frank Marta Galvagno Mana Gharun Damiano Gianelle Bert Gielen Beniamino Gioli Anatoly Gitelson Ignacio Goded Mathias Goeckede Allen H Goldstein Christopher M Gough Michael L Goulden Alexander Graf Anne Griebel Carsten Gruening Thomas Grünwald Albin Hammerle Shijie Han Xingguo Han Birger Ulf Hansen Chad Hanson Juha Hatakka Yongtao He Markus Hehn Bernard Heinesch Nina Hinko-Najera Lukas Hörtnagl Lindsay Hutley Andreas Ibrom Hiroki Ikawa Marcin Jackowicz-Korczynski Dalibor Janouš Wilma Jans Rachhpal Jassal Shicheng Jiang Tomomichi Kato Myr Computational Research Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. gzpastorello@lbl.gov. DIBAF University of Tuscia Viterbo 01100 Italy. Euro-Mediterranean Centre on Climate Change Foundation (CMCC) Lecce 73100 Italy. Climate & Ecosystem Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Computational Research Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Department of Civil Engineering California State University Sacramento CA 95819 USA. Department of Geography Environment and Spatial Sciences Michigan State University East Lansing MI 48823 USA. Department of Computer Science University of Virginia Charlottesville VA 22904 USA. TERN Ecosystem Processes Menzies Creek VIC3159 Australia. Max Planck Institute for Biogeochemistry Jena 07701 Germany. Laboratoire des Sciences du Climat et de l'Environnement (LSCE) CEA CNRS UVSQ UPSACLAY Gif sur Yvette 91190 France. Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China. Department of Soil Science University of Manitoba Winnipeg MB R3T2N2 Canada. Department of Agroecology and Environment Agroscope Research Institute Zürich 8046 Switzerland. School of Geography and Earth Sciences McMaster University L8S4K1 Hamilton ON Canada. Department of Physical Geography and Ecosystem Science Lund University Lund 22362 Sweden. Department of Agronomy and Horticulture University of Nebraska-Lincoln Lincoln NE 68583 USA. School of Ecosystem and Forest Sciences The University of Melbourne Richmond VIC3121 Australia. Department of Biology Research Group PLECO University of Antwerp Antwerp 2610 Belgium. Joint Research Centre European Commission Ispra 21027 Italy. TERRA Teaching and Research Center University of Liege Gembloux B-5030 Belgium. Finnish Meteorological Institute Helsinki 00560 Finland. ES

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Earthquake risk modeling for the evaluation of losses to property owners in the metropolitan area of Shiraz 10

Earthquake risk modeling for the evaluation of losses to pro...

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10th U.S. National Conference on Earthquake engineering: Frontiers of Earthquake engineering, NCEE 2014

作者： Sadeghi, M. Hochrainer-Stigler, S. Ghafory-Ashtinay, M. Pakdel-Lahiji, N. Dept. of Civil Engineering Science and Research Branch Islamic Azad University Tehran Iran Risk Policy and Vulnerability IIASA - International Institute of Applied system analysis Laxenburg Austria Dept. of Special Structures IIEES - International Institute of Earthquake Engineering and Seismology Tehran Iran

Natural disasters can cause huge human and economic losses, and subsequent operation efforts in disaster relief, recovery and reconstruction by the government, the private sector stakeholders as well as international donors can significantly drain their resources from other non-disaster related pre-planned investments. As a consequence, there is now a paradigm shift for dealing with extremes from after the event approaches to more pro-active ones, the later one including risk reduction and risk financing options. However, reliable and quantitative up-to-date estimation of the underlying risks is of outmost importance towards developing effective risk management strategies as well as risk reduction activities. This is even more so the case for countries that are highly exposed to natural hazards, such as earthquake risk in Iran. This paper focuses on earthquake risk for Shiraz, the 4th largest city in Iran, located in a high seismic active hazard zone with additional high socio-economic and historical importance for the country. It is for the first time that such an assessment for the region is performed and therefore the results should shed some light on potential risks within a probability based setting which could guide current earthquake related policy processes in the region. A catastrophe modeling approach is adopted to assess risk and a detailed analysis of potential future economic losses as well as vulnerability assessments for assets within district 1 is performed. Via combining the hazard, exposure and vulnerability an Exceedance Probability (EP) curve for asset and human losses was constructed. The EP curve represents a powerful tool for the assessment of feasible risk reduction strategies as well as cost-benefit analysis for these strategies. An approach is suggested how this could be achieved within an integrative framework.

关键词： Losses

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Risk management strategies for managing natural disaster risks: A case study in Shiraz City, Iran 10

Risk management strategies for managing natural disaster ris...

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10th U.S. National Conference on Earthquake engineering: Frontiers of Earthquake engineering, NCEE 2014

作者： Pakdel-Lahiji, N. Hochrainer-Stigler, S. Ghafory-Ashtinay, M. Sadeghi, M. Dept. of Civil Engineering Science and Research Branch Islamic Azad University Tehran Iran Risk Policy and Vulnerability IIASA - International Institute of Applied system analysis Laxenburg Austria Dept. Special Structures IIEES - International Institute of Earthquake Engineering and Seismology Tehran Iran

Almost all parts of Iran are seismic hazard prone areas and due to the low quality of constructions as well as the increase of exposure in urban areas, recent earthquake events caused unacceptable huge losses, both in human and economic terms. To assess the resilience of various risk bearers, including the government as well as private sector entities, the resources to cope with potential future events as well as possible interdependencies during the occurrence have to be analyzed in detail. Furthermore, to pro-actively act against possible future extremes with risk hedging instruments such as insurance, the underlying risk has to be determined in a quantitative manner. This paper suggest how to combine both, the coping dimension as well as the risk dimension, to determine possible risk management strategies which may be feasible in the Iranian context. The focus is specifically on risk instruments, such as insurance, for the Shiraz region in Iran, where newly produced probabilistic loss estimates are available which are subsequently used to analyze possible insurance schemes and for determining corresponding premium payments and affordability. The paper discusses how such risk instruments can be embedded within an integrated framework and which additional options, such as risk reduction or risk pooling, would be beneficial to lower premiums to affordable levels.

关键词： Earthquakes

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A model-based approach for achieving available automation systems 19

A model-based approach for achieving available automation sy...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Priego, R. Armentia, A. Orive, D. Estévez, E. Marcos, M. University of the Basque Country Department of System Engineering and Automatics Bilbao48013 Spain Universidad de Jaén Dept. of Electronics and Automatic Control Jaen Spain

ISBN: (纸本)9783902823625

Nowadays automation systems are required to be flexible in order to cope with the ever changing requirements of the applications in terms of complexity, extensibility or dynamism. The use of reconfiguration techniques helps to meet these demanding requirements, but at the same time increase the complexity of the systems. This paper presents a supervisor architecture that allows maintaining the availability of a control system in spite of failures such as a node crash, by means of reconfigurations at the control level. To do this, the advantages that Model-Driven Development technology provides have been explored. © IFAC.

关键词： Automation

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A study of circulating current in MMC based HVDC system under an unbalanced grid condition

A study of circulating current in MMC based HVDC system unde...

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作者： Do, Won-Seok Kim, Si-Hwan Kim, Tae-Jin Kim, Rae-Young Dept. of Electrical and Biomedicai Engineering Hanyang University Energy Electronics Control System Laboratory 222 Wangsimni-Ro Seongdong-Gu Seoul133-791 Korea Republic of

ISBN: (纸本)9781479940325

This paper shows a study about circulating current of modular multilevel converter (MMC) based a high voltage direct current (HVDC) system under some unbalanced grid conditions. A basic structure of the MMC HVDC system is introduced and its system dynamics is analyzed. Based on the analysis, the modeling of circulating current and its control method under balanced or unbalanced grid condition are described. From the point of view in circulating current control, two kinds of power control methods are analyzed and their performances compared. In addition, in order to apply the power control methods, some practical considerations are proposed and described. Several simulation results performed in the PSIM software verify the proposed analysis and consideration of the power control methods under various grid conditions. © 2014 IEEE.

关键词： Power control

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IAI mini panther - An innovative VTOL UAV design

IAI mini panther - An innovative VTOL UAV design

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54th Israel Annual Conference on Aerospace Sciences, IACAS 2014

作者： Zivan, Lior Wolff, Amit Dekel, Guy Efraty, Yoav Israel Aerospace Industries Ltd. Ben Gurion INTL Airport 70100 Israel Flight Control System Dept. IAI Engineering Division Israel R and D Dept. IAI Malat Division Israel Operational and HMI Design Dept. IAI Malat Division Israel

ISBN: (纸本)9781632662651

This paper briefly covers key aspects of the development of the Mini Panther VTOL UAV, from key design characteristics, flight control, transitions from hover to flight and vice versa, Flight control and AVTOL development and flight testing. Development key challenges included standard challenges (as in any other electric mini-UAV development) and unique challenges, driven by the AVTOL capability and unique configuration. Among the "standard" challenges are severe weight and volume restrictions and batteries energy limits - which were "amplified" by the VTOL requirements, and cost constraint which dictated a massive use of "Commercial Of The Shelf (COTS)" components. The unique challenges included design to thrust/weight ratio>l with a minimal impact on cruise and loiter performance, and above all - fully automated, safe and robust transitions from hover to flight and vice versa. Mathematical model limitations were addressed by allowing in-flight gains and parameters change, special flight-test modes and by performing the highly complex AVTOL development flights in safe altitude. The innovative aspects of the Mini Panther UAV system such as AVTOL capability, field level modularity and ease of operation were successfully flight tested and demonstrated.

关键词： Unmanned aerial vehicles (UAV)

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On Applying MDE for Generating Reconfigurable Automation systems

On Applying MDE for Generating Reconfigurable Automation Sys...

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International Conference on Industrial Informatics

作者： Rafael Priego Aintzane Armentia Elisabet Estévéz Marga Marcos Dept. of Automatic Control and System Engineering ETSI Bilbao Basque Country University (UPV/EHU) Bilbao Spain Dept. Ingenieria Electrónica y Automática EPS de Jaén University of Jaén Jaén Spain

ISBN: (纸本)9781479966509

The continuous changes on the market and customer demands have forced modern automation systems to provide more strict Quality of Service (QoS) requirements such as load balance or full availability of the control system, among other characteristics. In order to cope with these demanding requirements, modern automation systems have started to incorporate novel design approaches which include reconfiguration mechanisms. Following this trend, this paper presents the use of MDE techniques and technologies, to help in the definition of the control system of reconfigurable automation plants. Directly from the model-based design, a model-based tool is derived that provides support for the generation of the elements that compose the reconfigurable control system.

关键词： MDE Availability Automation system Mechatronic components

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