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IEEE Conference on Industrial Electronics and Applications

作者： Z. Q. Qian B. Han Y. Lin W. J. Lin W. J. Zhang Complex and Intelligent System Research Center East China University of Science and Technology Department of Mechanical and Industrial Engineering Northeastern University Advanced Engineering Design Laboratory University of Saskatchewan

ISBN: (纸本)9781467386456

This paper proposes a computational model along with an algorithm for a new problem in computer-aided design of systems. The new problem stems from a so-called rapid prototyping of system (RPS) technology the authors developed elsewhere before. The RPS has learned from traditional rapid prototyping technique which is in essence to construct a component from the material (liquid, sheet, etc.);but the RPS is to build a system from modules or components. In the RPS technology, a space is divided into several regions that represent different components. For the visualization purpose, one can imagine that different regions are painted in different colors. Further, modules have different types. The core issue with the RPS is to "fill" modules of different types to a colored space. This problem is called the RPS problem for simplicity. The proposed model is an optimization problem model and algorithm is a combination of the differential evolution and genetic algorithm. The proposed model along with the algorithm is tested and compared with other algorithms on three examples. The result of the comparisons has shown that the proposed model along with the algorithm can well solve this RPS problem.

关键词： Rapid prototyping of systems Modular module Genetic algorithm Differential evolution

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Balance Compensation Study of Electromagnetic Active Balancer for Motorized Spindle

Balance Compensation Study of Electromagnetic Active Balance...

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2016 13th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

作者： Bijia Shi Minqing Jing Hongwei Fan Heng Liu Qian Wang Key Laboratory of Education Ministry for Modern Design & Rotor-bearing System School of Mechanical Engineering Xi'an Jiaotong University School of Mechanical Engineering Xi'an University of Science and Technology

With the increase of rotating speed, the rotor unbalance of the modern rotating machinery becomes more sensitive. The on-line active balance is an ideal balancing mode for precision machines. Electromagnetic balancer is a non-contact new-structure balancing device in the on-line balancing field, as it can reliably work in high-speed condition and keep the position balanceable after turning down. Balance ability is an important indicator evaluating the performance of a balancer. This paper studies a new electromagnetic balancer carrying permanent magnet for the motorized spindle. Because the counterweight disk is the primary moving element of the balancer, its balance compensation value and distribution are mainly discussed in this paper. Based on the existing disk structure, the balance ability of disks with different structure is researched. The two counterweight disks with the same compensation value and distribution angle, the two disks have the same compensation value and different distribution angles, the two disks have different compensation values and the same distribution angle are analysed. The calculation results demonstrate that the first scheme is proven better in the balance ability and can be easily developed.

关键词： Motorized spindle Active balancing Counterweight disk Electromagnetic balancer Balance ability

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Study on Unbalance Magnetic Pull of the Motorized Spindle under Different Rotor Eccentricities

Study on Unbalance Magnetic Pull of the Motorized Spindle un...

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2016 13th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

作者： Jin Wang Minqing Jing Hongwei Fan Heng Liu Bijia Shi Key Laboratory of Education Ministry for Modern Design & Rotor-bearing System School of Mechanical Engineering Xi'an Jiaotong University School of Mechanical Engineering Xi'an University of Science and Technology

High-speed precision machining is one of the important development directions of modern machining technology, high-speed spindle system is widely used in high-speed machining, and motorized spindle is the main choice of the high-speed machine tool spindle. The electromagnetic force caused by rotor unbalance is one of main vibration sources of motorized spindle. Firstly, the research on the frequency spectrum characteristic of electromagnetic force under different rotor eccentricities is very necessary to suppress electromagnetic vibration. An electromagnetic finite element model was built for a motorized spindle based on Ansoft Maxwell in this paper. The electromagnetic force spectrum variation under the static and dynamic eccentricities is studied. The Unbalance Magnetic Pull(UMP) of the motorized spindle under different rotating speeds and different eccentricities are analysed. The results show that the motorized spindle with the static or dynamic eccentricity both produces new components in the electromagnetic force. Simultaneously, the eccentricity increase positively results in the increase of UMP amplitude. The UMP is constant under the rotor static eccentricity, which has a small impact on rotor vibration, while the frequency of UMP under the rotor dynamic eccentricity is the rotating frequency, which will increase the motorized spindle vibration. Finally, by the experiment the correctness of theoretical analysis and simulation are verified. This work provides a theoretical foundation for the fault diagnosis and dynamic balance of the motorized spindle.

关键词： Machine tool motorized spindle Unbalance Magnetic Pull(UMP) Rotor eccentricity Finite element analysis Frequency spectrum analysis

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How can a service-oriented router merge with a CDN?

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and systems 2016年第8期136卷 1172-1179页

作者： Wijekoon, Janaka L. Harahap, Erwin Tennekoon, Rajitha Nishi, Hiroaki Hiroaki Nishi Laboratory Graduate School of Computer Science Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama223-8522 Japan Department of System Design Engineering Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama223-8522 Japan

A large fraction of the Internet traffic is organized by the Content Delivery Networks (CDNs). CDNs redirect endusers to an appropriate server using Domain Name Servers (DNSs). Meanwhile, in future networks, it is anticipated that network routers will be equipped with more processing power and storage modules for providing most effective end-user services. From this viewpoint, a Service-oriented Router (SoR) is introduced to accelerate content-based services. This paper presents a novel method, DNS and SoR Collaborative Redirection (DSCR), to accelerate the end-user redirection. DSCR uses SoRs to collect and store network and server state information by placing SoRs at edges of the ISP network. The collected information is then used by the DSCR to leverage the DNS-based end-user redirection. We present the design and a prototype implementation of DSCR and, show how both SoR and DNS jointly can take advantage of existing Internet architecture to accelerate end-user redirection. We used a detailed simulation to evaluate the proposed method using various strategies. Simulations clearly demonstrate the effectiveness of the collaborative method, which yields 5-10% reduction in end-user latency when compared with DNS-based redirection. © 2016 The Institute of Electrical Engineers of Japan.

关键词： Routers

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Research on Post Nonlinear Geometric Algorithm for BSS of Mixed Vibration Simulation Signals from the Impeller Pumps

Research on Post Nonlinear Geometric Algorithm for BSS of Mi...

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The second International Symposium on Socially and Technically Symbiotic systems (STSS2015);The 7th International Symposium on Symbiotic Nuclear Power systems (ISSNP2015)

作者： Sun Shi-yan XIA Hong CHEN Zhi-hui YANG Bo LIU Mei-ru Fundamental Science on Nuclear Safety and Simulation Technology Laboratory College of Nuclear Science and TechnologyHarbin Engineering University Science and Technology on Reactor System Design Technology Laboratory Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China

In nuclear power plants,for rotating equipment,a normal method for monitoring the modes and diagnosing its fault is monitoring and analyzing its vibration or noise ***,the detected signals are usually the non-linear mixed signals produced by multiple pieces of equipment or their different *** order to distinguish equipment's status,Blind Source Separation technique need to be applied to separate the mixed signals,then equipment's mode can be distinguished *** existing mature BSS algorithms are based on the assumption of the linear *** it to the nonlinear mixed problem directly may cause failure or result in totally wrong *** this paper,we apply geometric algorithm to separate the mixed vibration simulation *** method follows the post-nonlinear mixing model assumption,and develops its separating measure exploiting the difference between a linear mixture and a nonlinear one from their distributions in a three-dimensional *** impeller pump,which is a typical rotating machinery in nuclear power plants,is chosen as the study *** build a three-dimensional model of a kind of impeller pump,use Finite Element Analysis method to create some correlative stress and mode analysis,decorate appropriate monitoring points to get the most intense vibration simulation signal in the pump,and then construct the mixed *** using the post-nonlinear geometric algorithm,the mixed vibration simulation signals of the pump are *** with correlation coefficient,the algorithm performs *** can obtain the same vibration peak frequency from the result as that from the source signals.

关键词： Blind Source Separation post-nonlinear model geometric algorithm the impeller pump vibration simulation signal

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Study on Key Technologies in Product Lifecycle Data Management system for Spindle Bearings of Numerically Controlled Machine Tool

Study on Key Technologies in Product Lifecycle Data Manageme...

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2016 6th International Conference on Machinery,Materials,Environment,Biotechnology and Computer(MMEBC 2016)

作者：崔咏 Jishun LI Xin SUI Wei MA 河南省洛阳市河南科技大学西苑校区 Henan Key Laboratory for Machinery Design and Transmission System Henan University of Science and Technology

In order to fulfil the lifecycle data management for the spindle bearings of CNC machine tool, this paper firstly presented a bearings-lifecycle-oriented data management model, in which the bearings' code re-factoring methods and a ontology-based entity relationship(E-R) model are discussed in detailSecondly, the key technologies of the data management system that utilized the presented data models, including the architecture, database design and integration schemas are described as wellFinally, a component-based system framework is presented to solve the heterogeneous problem in the process of XML-based bearing data extraction, transformation, cleaning and loadingAn application demo will also be given to demonstrate the unity of management, integration, tracking and feedback for the lifecycle data management for spindle bearing.

关键词： Machine Tool Bearings Production Lifecycle Management Data Model Integration technology

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Author Correction: The power of genetic diversity in genome-wide association studies of lipids

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Nature 2023年第7965期618卷 E19-E20页

作者： Sarah E Graham Shoa L Clarke Kuan-Han H Wu Stavroula Kanoni Greg J M Zajac Shweta Ramdas Ida Surakka Ioanna Ntalla Sailaja Vedantam Thomas W Winkler Adam E Locke Eirini Marouli Mi Yeong Hwang Sohee Han Akira Narita Ananyo Choudhury Amy R Bentley Kenneth Ekoru Anurag Verma Bhavi Trivedi Hilary C Martin Karen A Hunt Qin Hui Derek Klarin Xiang Zhu Gudmar Thorleifsson Anna Helgadottir Daniel F Gudbjartsson Hilma Holm Isleifur Olafsson Masato Akiyama Saori Sakaue Chikashi Terao Masahiro Kanai Wei Zhou Ben M Brumpton Humaira Rasheed Sanni E Ruotsalainen Aki S Havulinna Yogasudha Veturi QiPing Feng Elisabeth A Rosenthal Todd Lingren Jennifer Allen Pacheco Sarah A Pendergrass Jeffrey Haessler Franco Giulianini Yuki Bradford Jason E Miller Archie Campbell Kuang Lin Iona Y Millwood George Hindy Asif Rasheed Jessica D Faul Wei Zhao David R Weir Constance Turman Hongyan Huang Mariaelisa Graff Anubha Mahajan Michael R Brown Weihua Zhang Ketian Yu Ellen M Schmidt Anita Pandit Stefan Gustafsson Xianyong Yin Jian'an Luan Jing-Hua Zhao Fumihiko Matsuda Hye-Mi Jang Kyungheon Yoon Carolina Medina-Gomez Achilleas Pitsillides Jouke Jan Hottenga Gonneke Willemsen Andrew R Wood Yingji Ji Zishan Gao Simon Haworth Ruth E Mitchell Jin Fang Chai Mette Aadahl Jie Yao Ani Manichaikul Helen R Warren Julia Ramirez Jette Bork-Jensen Line L Kårhus Anuj Goel Maria Sabater-Lleal Raymond Noordam Carlo Sidore Edoardo Fiorillo Aaron F McDaid Pedro Marques-Vidal Matthias Wielscher Stella Trompet Naveed Sattar Line T Møllehave Betina H Thuesen Matthias Munz Lingyao Zeng Jianfeng Huang Bin Yang Alaitz Poveda Azra Kurbasic Claudia Lamina Lukas Forer Markus Scholz Tessel E Galesloot Jonathan P Bradfield E Warwick Daw Joseph M Zmuda Jonathan S Mitchell Christian Fuchsberger Henry Christensen Jennifer A Brody Mary F Feitosa Mary K Wojczynski Michael Preuss Massimo Mangino Paraskevi Christofidou Niek Verweij Jan W Benjamins Jorgen Engmann Rachel L Kember Roderick C Slieker Ken Sin Lo Nuno R Zilhao Phuong Le Marcus E Kleber Graciela E Delgado Shaofeng Huo Dai Department of Internal Medicine Division of Cardiology University of Michigan Ann Arbor MI USA. VA Palo Alto Health Care System Palo Alto CA USA. Department of Medicine Division of Cardiovascular Medicine Stanford University School of Medicine Stanford CA USA. Department of Computational Medicine and Bioinformatics University of Michigan Ann Arbor MI USA. William Harvey Research Institute Barts and the London School of Medicine and Dentistry Queen Mary University of London London UK. Department of Biostatistics and Center for Statistics Genetics University of Michigan Ann Arbor MI USA. Department of Genetics Perelman School of Medicine University of Pennsylvania Philadelphia PA USA. Clinical Pharmacology William Harvey Research Institute Barts and The London School of Medicine and Dentistry Queen Mary University of London London UK. Endocrinology Boston Children's Hospital Boston MA USA. Medical and Population Genetics Broad Institute Cambridge MA USA. Department of Genetic Epidemiology University of Regensburg Regensburg Germany. McDonnell Genome Institute and Department of Medicine Washington University St Louis MO USA. Department of Precision Medicine Division of Genome Science National Institute of Health Cheongju-si South Korea. Tohoku Medical Megabank Organization Tohoku University Sendai Japan. Sydney Brenner Institute for Molecular Bioscience Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa. Center for Research on Genomics and Global Health National Human Genome Research Institute National Institutes of Health Bethesda MD USA. Blizard Institute Barts and the London School of Medicine and Dentistry Queen Mary University of London London UK. Wellcome Sanger Institute Hinxton UK. Department of Epidemiology Emory University Rollins School of Public Health Atlanta GA USA. Atlanta VA Health Care System Decatur GA USA. Malcolm Randall VA Medical Center Gainesville FL USA. Division of Vascular Sur

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Visible‐Light‐Promoted Nickel‐ and Organic‐Dye‐Cocatalyzed Formylation Reaction of Aryl Halides and Triflates and Vinyl Bromides with Diethoxyacetic Acid as a Formyl Equivalent

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Angewandte Chemie 2017年第6期129卷

作者： He Huang Xiangmin Li Chenguang Yu Yueteng Zhang Patrick S. Mariano Wei Wang Department of Chemistry and Chemical Biology University of New Mexico Albuquerque NM 87131 USA State Key Laboratory of Bioengineering Reactor and Shanghai Key Laboratory of New Drug Design School of Pharmacy East China University of Science & Technology 130 Mei-Long Road Shanghai 200237 P.R. China

A simple formylation reaction of aryl halides, aryl triflates, and vinyl bromides under synergistic nickel‐ and organic‐dye‐mediated photoredox catalysis is reported. Distinct from widely used palladium‐catalyzed formylation processes, this reaction proceeds by a two‐step mechanistic sequence involving initial in situ generation of the diethoxymethyl radical from diethoxyacetic acid by a 4CzIPN‐mediated photoredox reaction. The formyl‐radical equivalent then undergoes nickel‐catalyzed substitution reactions with aryl halides and triflates and vinyl bromides to form the corresponding aldehyde products. Significantly, besides aryl bromides, less reactive aryl chlorides and triflates and vinyl halides serve as effective substrates for this process. Since the mild conditions involved in this reaction tolerate a plethora of functional groups, the process can be applied to the efficient preparation of diverse aromatic aldehydes.

关键词： Durchflusschemie Formylierungen Nickelkatalyse Photoredoxkatalyse Synthesemethoden

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Balance compensation study of electromagnetic active balancer for motorized spindle

Balance compensation study of electromagnetic active balance...

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International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

作者： Bijia Shi Minqing Jing Hongwei Fan Heng Liu Qian Wang Key Laboratory of Education Ministry for Modern Design & Rotor-bearing System Xi'an China School of Mechanical Engineering Xi'an Jiaotong University Xi'an China School of Mechanical Engineering Xi'an University of Science and Technology Xi'an China

ISBN: (纸本)9781509008223

关键词： Magnetic analysis

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Synthesis of Aldehydes by Organocatalytic Formylation Reactions of Boronic Acids with Glyoxylic Acid

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Angewandte Chemie 2017年第28期129卷

作者： He Huang Chenguang Yu Xiangmin Li Yongqiang Zhang Yueteng Zhang Xiaobei Chen Patrick S. Mariano Hexin Xie Wei Wang Department of Chemistry & Chemical Biology University of New Mexico Albuquerque NM 87131 USA State Key Laboratory of Bioengineering Reactor and Shanghai Key Laboratory of New Drug Design School of Pharmacy East China University of Science & Technology 130 Mei-Long Road Shanghai 200237 P.R. China

Reported herein is a conceptually novel organocatalytic strategy for the formylation of boronic acids. New reactivity is engineered into the α‐amino‐acid‐forming Petasis reaction occurring between aryl boronic acids, amines, and glyoxylic acids to prepare aldehydes. The operational simplicity of the process and its ability to generate structurally diverse and valued aryl, heteroaryl, and α,β‐unsaturated aldehydes containing a wide array of functional groups, demonstrates the practical utility of the new synthetic strategy.

关键词： Arene Bor Formylierungen Organokatalyse Synthesemethoden

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