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arXiv 2017年

作者： Ceyhan, Gökhan Bahadir Sahin, H. Kurt, Nermin Elif derinkuyu, Kürşad Software R&D Specialist Energy Exchange Istanbul Turkey Application Development Specialist Energy Exchange Istanbul Turkey Dept. of Industrial Engineering TOBB University of Economy and Technology Turkey

Bidders in day-ahead electricity markets want to sell/buy electricity when their bids generate positive surplus and not to take an action when the reverse holds. However, non-convexities in these markets cause conflicts between the actions that the bidders want to take and the actual market results. In this work, we investigate the non-convex market clearing problem of Turkish market operator and propose three different rule sets. The first rule set allows both rejection of bids with positive surplus and acceptance of bids with negative surplus. The second and the third sets only allow one of these conflicted cases. By using total surplus maximization as the objective, we formulate three models and statistically explore their performance with the real data taken from Turkish market operator. Copyright © 2017, The Authors. All rights reserved.

关键词： Power markets

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Empirical comparison of three models for determining market clearing prices in Turkish day-ahead electricity market

Empirical comparison of three models for determining market ...

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International Conference on European Electricity Market, EEM

作者： Gookhan Ceyhan Nermin Elif Kurt H. Bahadir Sahin Kürşad derinkuyu Software R&D Specialist Energy Exchange Istanbul Turkey Application Development Specialist Energy Exchange Istanbul Turkey Dept. of Industrial Engineering TOBB University of Economy and Technology Turkey

关键词： Pricing Europe Biological system modeling Electricity supply industry Energy exchange Electronic mail Indexes

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Bird-mimetic Wing System of Flapping-wing Micro Air Vehicle with Autonomous Flight Control Capability

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Journal of Bionic Engineering 2016年第3期13卷 458-467页

作者： Sriyulianti Widhiarini Ji Hwan Park Bum Soo Yoon Kwang Joon Yoon ll-Hyun Paik Jong Heon Kim Chan Yik Park Seung Moon Jun Changho Nam Department of Aerospace Engineering Konkuk University Gwangjin-gu Seoul South Korea Deptartment of PGM Technology Hanwha Corp. R&D Center Daejeon South Korea Agency for Defense Development Daejeon South Korea Department of Engineering Technology Arizona State University Mesa Arizona

A micro air vehicle with a bird-mimetic up-down and twisting wing drive system was developed in this study. The Flap- ping-wing Micro Air Vehicle （FMAV）, with a 50 cm wingspan and a double-crank drive system, performed successful flights of up to 23 min. The performance and capabilities of the FMAV were enhanced by adapting a number of unique features, such as a bird-mimetic wing shape with a span-wise camber and an up-down and twisting wing drive mechanism with double-crank linkages, This lift-enhancing design by mimicking the flapping mechanism of a bird＇s wing enabled the 210 g FMAV to fly autonomously in an outdoor field under wind speeds of less than 5 m.s-1. Autonomous flight was enabled by installing a flight control computer with a micro-electro-mechanical gyroscope and accelerometers, along with a micro video camera and an ultralight wireless communication system inside the fuselage. A comprehensive wind tunnel test shows that the FMAV with a high-camber wing and double-crank mechanism generates more lift and less net thrust than the FMAV with a flat wing and single-crank mechanism, which confirms the improved performance of the developed FMAV, as well as the superior slow flying or hovering capabilities of the FMAV with a high-camber wing and double-crank wing drive system.

关键词： flapping-wing MAV autonomous flight biomimetic wing double crank wing

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Mechanical behaviors of cement systems in different conditions

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Natural Gas Industry B 2017年第3期4卷 212-216页

作者： Zheng, Youzhi Xu, Bingqing Pu, Junhong Mu, Naiqu Wang, Bin Li, Ming Engineering Technology Research Institute PetroChina Southwest Oil & Gas Field Company Guanghan 618300 Sichuan China Engineering Technology Research Institute National Energy High Sulfur Exploitation R&D Center Guanghan 618300 Sichuan China Engineering Division PetroChina Southwest Oil & Gas Field Company Chengdu 610051 Sichuan China Northeast Sichuan Division PetroChina Southwest Oil & Gas Field Company Chengdu 610051 Sichuan China Sichuan Changning Natural Gas Development Ltd. PetroChina Southwest Oil & Gas Field Company Chengdu 610051 Sichuan China School of Material Science and Engineering Southwest Petroleum University Chengdu 610500 Sichuan China

At present, the mechanical testing on the ductility of cement sheath is faced with multiple technical difficulties. In this paper, numerical simulation and laboratory evaluation were adopted to compare the mechanical performance of typical elastic, flexible, ductile and neat cement systems at home and abroad by different loading rates, value range of stress–strain curve, confining pressure and temperature. It is shown that when the loading rate is lower, the stress–strain curve of set cement is not smooth, but distorted, and the stress cannot be responded in time;that when the loading rate is higher, the stress–strain curve of set cement is smooth, and the yield stage is remarkable, indicating that higher loading rate can reflect the yield strain behavior of set cement more truly;that the recommended Young's modulus range of set cement should be changed based on the actual downhole conditions;that temperature has more effect on yield stress and ultimate strain, but less effect on elastic modulus;that confining pressure has more effect on ultimate stress and ultimate strain, but less effect on elastic modulus;and that when the confining pressure is lower and temperature is higher, the yield stage of set cement is more remarkable. It is concluded that these mechanical behaviors of cement system in different conditions provide a technical support for understanding the mechanical essence of downhole cement sheath and exploring the mechanical integrity of cement sheath and even that of the whole wellbore. © 2017 Sichuan Petroleum Administration

关键词： Confining pressure Loading rate Mechanical testing on ductility of cement sheath Set cement Stress–strain Temperature Well cementing

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Corrosion and biocompatibility improvement of magnesium-based alloys as bone implant materials:a review

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regenerative Biomaterials 2017年第2期4卷 129-137页

作者： Long Li Ming Zhang Ye Li Jie Zhao Ling Qin Yuxiao Lai Translational Medicine R&D Center Institute of Biomedical and Health EngineeringShenzhen Institutes of Advanced TechnologyChinese Academy of Sciences1068 Xueyuan AvenueShenzhen University TownShenzhen 518055China Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences1068 Xueyuan AvenueShenzhen University TownShenzhen 518055China Material Engineering Invention Examination Department State Intellectual Property OfficeNo.6 Xitucheng Road Haidian DistrictBeijing 100088China Musculoskeletal Research Laboratory Department of Orthopedics and TraumatologyThe Chinese University of Hong KongShatinNTHong Kong SARChina Key Laboratory of Molecular Engineering of Polymers Fudan University220 Handan RoadYangpu DistrictShanghai 200433China.

Magnesium(Mg)or its alloys are widely tested as potential orthopedic implants,particularly as biodegradable alloys for fracture fixation due to their mechanical properties are close to those of ***,available Mg or its alloys are confronted with challenges in passing regulatory biosafety tests prior to clinical trials due to its fast degradation and associated degradation *** degradation of Mg is accompanied by the release of Mg ions,the rise of pH and osmolality in surrounding *** to the standard of ISO 10993 Part 13,the pH value shall be appropriate to the site of intended use maintaining in an appropriate *** to overcome these challenges include the selection of adequate alloying elements,proper surface treatment techniques and control of the degradation rate of Mg or its alloys developed as orthopedic *** date,Mg or its alloy-based bone implants have not yet been widely used in clinical applications as medical *** review critically summarized published methods to improve the corrosion resistance of Mg and its *** current progress on in vitro cytotoxicity and in vivo biocompatibility properties of these metals was also *** review aimed to provide a reference for further research and development(r&d)of biodegradable Mg and its alloys with regard to the evaluation of their corrosion process and biocompatibility and facilitation of their translation to clinical applications.

关键词： magnesium alloy biocompatibility corrosion bone implant

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Ammonium sulfide-assisted hydrothermal activation of palygorskite for enhanced adsorption of methyl violet

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Journal of Environmental Sciences 2016年第3期28卷 33-43页

作者： Guangyan Tian Wenbo Wang Yuru Kang Aiqin Wang Center for Eco-material and Green Chemistry Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of the Chinese Academy of Sciences Beijing 100049China R&D Center of Xuyi Palygorskite Applied Technology Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesXuyi 211700China

Herein,palygorskite（PAL）was activated via a simple hydrothermal process in the presence of ammonium sulfide,and the effects of activation on the microstructure,physico-chemical feature and adsorption behaviors of PAL were intensively *** hydrothermal process evidently improved the dispersion of PAL crystal bundles,increased surface negative charges and built more active –Si–O-groups served as the new＂adsorption sites＂.The adsorption property of the activated PAL for Methyl Violet（MV）was systematically investigated by optimizing the adsorption variables,including p H,ionic strength,contact time and initial MV *** activated PAL exhibited a superior adsorption capability to the raw PAL for the removal of MV（from 156.05 to 218.11 mg/g）.The kinetics for MV adsorption followed pseudo second-order kinetic models,while the isotherm and thermodynamics results showed that the adsorption pattern well followed the Langmuir *** structure analysis of PAL before and after adsorption demonstrated that electrostatic interaction and chemical association of –X–O-are the prominent driving forces for the adsorption process.

关键词： Palygorskite Hydrothermal Adsorption Methyl violet

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The tracking machine learning challenge: Accuracy phase

arXiv

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arXiv 2019年

作者： Amrouche, Sabrina Basara, Laurent Calafiura, Paolo Estrade, Victor Farrell, Steven Ferreira, diogo r. Finnie, Liam Finnie, Nicole Germain, Cécile Gligorov, Vladimir Vava Golling, Tobias Gorbunov, Sergey Gray, Heather Guyon, Isabelle Hushchyn, Mikhail Innocente, Vincenzo Kiehn, Moritz Moyse, Edward Puget, Jean-François reina, Yuval rousseau, david Salzburger, Andreas Ustyuzhanin, Andrey Vlimant, Jean-roch Wind, Johan Sokrates Xylouris, Trian Yilmaz, Yetkin Département de Physique Nucléaire et Corpusculaire Université de Genève Geneva Switzerland LRI TAU Univ. Paris-Sud INRIA CNRS Université Paris-Saclay Gif-sur-Yvette France Physics Division Lawrence Berkeley National Laboratory University of California BerkeleyCA United States IST University of Lisbon Lisbon Portugal IBM Germany Research and Development Germany Bosch Center for Artificial Intelligence Germany LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS IN2P3 Paris France Goethe University Frankfurt am Main Germany UPSud INRIA Université Paris-Saclay Orsay France ChaLearn BerkeleyCA United States National Research University Higher School of Economics Yandex School of Data Analysis Moscow Russia CERN Geneva Switzerland Department of Physics University of Massachusetts AmherstMA United States Data and AI R&D IBM France Lab Biot France Tel-Aviv Israel LAL Univ. Paris-Sud CNRS IN2P3 Université Paris-Saclay Orsay France California Institute of Technology PasadenaCA United States Norwegian University of Science and Technology Oslo Norway Frankfurt Germany

This paper reports the results of an experiment in high energy physics: using the power of the "crowd" to solve difficult experimental problems linked to tracking accurately the trajectory of particles in the Large Hadron Collider (LHC). This experiment took the form of a machine learning challenge organized in 2018: the Tracking Machine Learning Challenge (TrackML). Its results were discussed at the competition session at the Neural Information Processing Systems conference (NeurIPS 2018). Given 100.000 points, the participants had to connect them into about 10.000 arcs of circles, following the trajectory of particles issued from very high energy proton collisions. The competition was difficult with a dozen front-runners well ahead of a pack. The single competition score is shown to be accurate and effective in selecting the best algorithms from the domain point of view. The competition has exposed a diversity of approaches, with various roles for Machine Learning, a number of which are discussed in the document. © 2019, CC BY.

关键词： Machine learning

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Cover Feature: Synthesis, Structures, and Thermal Properties of Symmetric and Janus “Lantern Cage” Siloxanes (Chem. Eur. J. 7/2019)

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Chemistry – A European Journal 2019年第7期25卷 1603-1603页

作者： Taishi Uchida dr. Yasunobu Egawa Takuto Adachi Naoki Oguri Masato Kobayashi Prof. dr. Takako Kudo Prof. dr. Nobuhiro Takeda Prof. dr. Masafumi Unno dr. ryoji Tanaka Department of Chemistry and Chemical Biology Graduate School of Science and Technology Gunma University Kiryu 376-8515 Gunma Japan Present Address: Frontier Research Group Research and Development (R&D) Center for Marine Bioscience Japan Agency for Marine-Earth Science and Technology (JAMSTEC) 2-15 Natsushima-cho Yokosuka 237-0061 Kanagawa Japan Inorganic Materials Chemistry Group Sagami Chemical Research Institute Ayase 252-1193 Kanagawa Japan Department of Pure and Applied Science Graduate School of Science and Technology Gunma University Kiryu 376-8515 Gunma Japan

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Fundamental experiments of eddy current testing for additive manufacturing metallic material toward in-process inspection

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AIP Conference Proceedings 2019年第1期2102卷

作者： Noriyasu Kobayashi Setsu Yamamoto Azusa Sugawara Masayo Nakane daisuke Tsuji Takehisa Hino Takahiro Terada Makoto Ochiai 1Nuclear System Technology R&D Dept. Toshiba Energy Systems & Solutions Corporation 8 Shinsugita-cho Isogo-ku Yokohama-shi Kanagawa 235-8523 Japan 2Technology & Production Planning Div. Toshiba Energy Systems & Solutions Corporation 72-34 Horikawa-cho Saiwai-ku Kawasaki-shi Kanagawa 212-8585 Japan 3Structural and Functional Materials Technology R&D Dept. Toshiba Energy Systems & Solutions Corporation 2-4 Suehiro-cho Tsurumi-ku Yokohama-shi Kanagawa 230-0045 Japan 4Corporate Manufacturing Engineering Center Toshiba Corporation 33 Shinisogo-cho Isogo-ku Yokohama-shi Kanagawa 235-0017 Japan 5Power and Industrial Systems Research and Development Center Toshiba Corporation 8 Shinsugita-cho Isogo-u Yokohama-shi Kanagawa 235-8523 Japan

We evaluated the detectability of the eddy current testing for the inner defects of the additive manufacturing specimens with the step and the slope on the surfaces by the fundamental experiments. The eddy current testing was able to detect the inner defects of 0.5 mm or more in diameter which were at the depth of 0.5 mm from the surfaces of the specimens in signal-to-noise ratio of 2 or more at the frequency of 250 kHz. We also confirmed that the signal post-processing for the acquired eddy current testing data had the potential to separate the inner defect signals from the noises caused by the surface shapes using the difference in the phase angle between the signals and the noises.

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direct measurement of near-bottom turbulence in deep ocean for predicting behavior of suspended particles in Sagami Bay and the Okinawa Trough, Japan

Direct measurement of near-bottom turbulence in deep ocean f...

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Oceans (Conference)

作者： Yasuo Furushima Hironori Higashi Tatsuo Fukuhara Naoki Furuichi Hiroyuki Yamamoto Research and Development (R&D) Center for Submarine Resources Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Yokosuka Japan National Research Institute of Fisheries Engineering Japan Fisheries Research and Education Agency (FRA) Kamisu Japan

ISBN: (纸本)9781509064298;9780692946909

In this study, turbulent flows were measured using the Expendable Vertical Microstructure Profiler (VMP-X) at the hydrothermal fields in the Okinawa Trough (Iheya North field and Noho site) and Sagami Bay (off Itoh and at Ohmuro Caldera) to characterize the turbulence intensity. For each observation point, the turbulent flow data were successfully measured between the sea surface and the sea floor. In the vicinity of the sea floor off Itoh port, the energy dissipation rate (ε) was measured as 10~(-6) (W kg~(-1)). This value was equivalent to that frequently observed in the surface mixed layer. real-time current measurements are obtained from the Acoustic doppler Current Profiler (AdCP) at the real-time deep Seafloor Observatory off Hatsushima Island, which is operated by JAMSTEC. Strong northeastward flows at the time of turbulent flow measurement were confirmed by AdCP data. Such strong northeastward flows may intensify turbulence near the sea floor. It is important that we clarify the response with turbulent flow data and existing data in this way. As a result of the direct measurement of turbulent flow in the Okinawa Trough, the turbulent energy dissipation rate (ε) near the bottom was approximately 10~(-7) (W kg~(-1)). Turbulent flow was strong from the bottom to a height of around 20 m from the bottom, and water temperature slightly rose at the Noho site in the Okinawa Trough. This fluctuation may be due to the influence of hydrothermal venting. Therefore, the intensity of turbulence (ε: energy dissipation rate) may also be affected by the hydrothermal venting. However, the results obtained using the turbulent flow meter (VMP-X) are only a snapshot, and more in-situ observational data is necessary to understand the dynamics of the bottom mixed layer (turbulent flow). Therefore, data filing in consideration of spatiotemporal dynamics is still necessary.

关键词： Turbulent flow VMP-X Hydrothermal fields Energy dissipation rate Bottom mixed layer

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