检索结果-内蒙古大学图书馆

IEEE Symposium on Intelligent Vehicle

作者： Tianyi Li Ming Yang Xujin Zhou Chunxiang Wang Department of Automation Key Laboratory of System Control and Information Processing Shanghai China Department of Instrument Science and Engineering Shanghai Jiao Tong University Shanghai China Research Institute of Robotics Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9781509018222

Terrain-based localization is an alternate to the global positioning system (GPS) in signal blocked areas. However, terrain-based localization technique may suffer from low accuracy or even fail when brake vibration occurs. This paper presents a real-time algorithm for vehicle localization which is robust against brake vibration. The input includes a reference map of pitch difference and measurements from rear wheel encoders and inertial measurement units (IMU). This method consists of two steps. In the first step, terrain map is generated using pitch difference at equidistant intervals. After that, the Bayesian inference and particle filters are adopted in the second step to identify the vehicle location during travel. To enhance system stability, we propose dynamic distributions of filter variances according to acceleration input. Experimental results demonstrate that the localization method with dynamic distributions can localize the vehicle quickly with high accuracy even when a quite severe shuddering happens.

关键词： Vehicles Roads Brakes Acceleration Heuristic algorithms Vibrations Standards

来源：评论

学校读者我要写书评

暂无评论

CONVERGENCE-OPTIMIZED VARIABLE NODE STRUCTURE FOR STOCHASTIC LDPC DECODER

CONVERGENCE-OPTIMIZED VARIABLE NODE STRUCTURE FOR STOCHASTIC...

引用

IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Qichen Zhang Yun Chen Di Wu Yeong-luh Ueng Xiaoyang Zeng Fudan University State Key Laboratory of ASIC and system Shanghai 200433 CHINA National Tsing Hua University Department of Electrical Engineering Hsinchu Taiwan

ISBN: (纸本)9781479999897

By using stochastic computation, a fully-parallel low-density parity-check (LDPC) decoder can be implemented using a lower wire complexity. In order to enhance the decoder performance, probability tracers, such as up/down counters, are added at each edge between variable nodes and check nodes, as described in previous literature. However, this causes a large decoding latency and a high number of decoding failures. In this paper, a convergence-optimized structure for variable nodes is proposed that is able to overcome these issues. As a result, the throughput for the proposed decoder is 20.5Gb/s, which is 101% higher than the original counter-based decoder presented in the previous literature.

关键词： LDPC decoder stochastic decoding up/down counter convergence-optimized decoders low density parity check codes Ganglia DECODING Throughput

来源：评论

学校读者我要写书评

暂无评论

Rapid seismic analysis methodology for in-service wind turbine towers

引用

Earthquake Engineering and Engineering Vibration 2015年第3期14卷 539-548页

作者： Dai Kaoshan Huang Yichao Gong Changqing Huang Zhenhua Ren Xiaosong State Key Laboratory of Disaster Reduction in Civil Engineering and College of Civil Engineering Tongji University State Key Lab of Power Transmission Equipment & System Security and New Technology Chongqing University Department of Engineering Technology University of North Texas

The wind energy industry has been growing rapidly during the past *** with this growth,engineering problems have gradually emerged in the wind power industry,including those related to the structural reliability of turbine *** study proposes a rapid seismic analysis methodology for existing wind turbine tower *** method is demonstrated and validated using a case study on a 1.5 MW tubular steel wind turbine *** finite element(FE)models are developed *** tests are conducted to obtain the turbine tower’s vibrational *** tests include(1) remotely measuring the tower vibration frequencies using a long range laser Doppler Vibrometer and(2) monitoring the tower structural vibration by mounting accelerometers along the height of the tubular ***-situ measurements are used to validate and update the FE models of the wind turbine *** the updated FE model that represents the practical structural conditions,seismic analyses are performed to study the structural failure,which is defined by the steel yielding of the tubular *** research is anticipated to benefit the management of the increasing number of wind energy converters by providing an understanding of the seismic assessment of existing tubular steel wind turbine towers.

关键词： wind turbine tower fi eld testing laser sensing se

来源：评论

学校读者我要写书评

暂无评论

A dual-pass data assimilation scheme for estimating surface fluxes with FY3A-VIRR land surface temperature

引用

Science China Earth Sciences 2015年第2期58卷 211-230页

作者： XU TongRen LIU ShaoMin XU ZiWei LIANG ShunLin XU Lu State Key Laboratory of Remote Sensing Science and School of Geography Beijing Normal University State Key Laboratory of Remote Sensing Science and College of Global Change and Earth System ScienceBeijing Normal University Department of Geographical Sciences University of Maryland College Park Information Technology Department National Library of China

In this work, a dual-pass data assimilation scheme is developed to improve predictions of surface flux. Pass 1 of the dual-pass data assimilation scheme optimizes the model vegetation parameters at the weekly temporal scale, and Pass 2 optimizes the soil moisture at the daily temporal scale. Based on ensemble Kalman filter(EnKF), the land surface temperature(LST) data derived from the new generation of Chinese meteorology satellite(FY3A-VIRR) are assimilated into common land model(CoLM) for the first time. Six sites, Daman, Guantao, Arou, BJ, Miyun and Jiyuan, are selected for the data assimilation experiments and include different climatological conditions. The results are compared with those from a dataset generated by a multi-scale surface flux observation system that includes an automatic weather station(AWS), eddy covariance(EC) and large aperture scintillometer(LAS). The results indicate that the dual-pass data assimilation scheme is able to reduce model uncertainties and improve predictions of surface flux with the assimilation of FY3A-VIRR LST data.

关键词： assimilation moisture latent weekly vegetation weather pixel covariance aperture Figure

来源：评论

学校读者我要写书评

暂无评论

Chance-Constrained Goal-Programming Based Day Ahead Scheduling in Wind Power Integrated system

Chance-Constrained Goal-Programming Based Day Ahead Scheduli...

引用

IEEE Power and Energy Society General Meeting

作者： Yang Wang Zhi Zhou Shuqiang Zhao Yan Xu Runze Chen Jiafu Yin Audun Botterud State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Argonne National Laboratory Department of Electrical Engineering Tsinghua University

ISBN: (纸本)9781509041695

To mitigate the impact of wind forecasting error uncertainty, a Chance-Constrained Goal Programming (CCGP) based day-ahead scheduling model is proposed in this paper. Compared with the traditional Chance Constrained Programming (CCP) method, the CCGP based model is more flexible, which allows higher violation probability than the predefined probability in necessary situations. In this way, the day-ahead scheduling and the uncertain range covered by reserves can be both optimized. Therefore, the reliability and economy of the system with wind power uncertainty can be considered in details with more flexibilities. In addition, because slack variables in CCGP model have corresponding physical meanings, they can provide more information to system operators. Furthermore, numerical tests are performed with the IEEE 118 bus system with wind power input. Results indicate that the proposed method achieves a good balance of cost and risk. And the total operation cost, especially the unit commitment cost, is reduced by the proposed method. Comparative evaluations of the proposed CCGP method and CCP method are presented in the paper.

关键词： Chance constrained Goal programming Unit commitment Day ahead scheduling Uncertain range Unit commitment Goal programming Wind energy Integrated system

来源：评论

学校读者我要写书评

暂无评论

Bound states in the continuum in fiber Bragg gratings

arXiv

引用

arXiv 2017年

作者： Gao, Xingwei Zhen, Bo Soljačić, Marin Chen, Hongsheng Hsu, Chia Wei State Key Laboratory of Modern Optical Instrumentation College of Information Science & Electronic Engineering Zhejiang University Hangzhou310027 China Department of Electrical and System Engineering University of Pennsylvania PhiladelphiaPA19104 United States Department of Physics and Astronomy University of Pennsylvania PhiladelphiaPA19104 United States Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Electromagnetics Academy at Zhejiang University Zhejiang University Hangzhou310027 China Ming Hsieh Department of Electrical Engineering University of Southern California Los AngelesCA90089 United States

Optical fibers typically confine light through total internal reflection or through photonic bandgaps. Here we show that light can be perfectly guided in optical fibers through a different mechanism based on bound states in the continuum (BICs). In fibers with periodic Bragg gratings, we predict bona fide BICs in pure-polarization modes, as well as quasi-BICs in hybrid-polarization modes. These guided modes exist robustly without the need for fine structural tuning, and they persist even with the very small grating index contrasts that are available in conventional fiber Bragg gratings. The suppression of radiation loss arises from the coupling between a weakly-radiating mode and a strongly-radiating one. This finding opens the possibility of guiding light with BICs in optical fibers and their applications in distributed fiber sensors, in-line fiber filters, and high-power fiber lasers. Copyright © 2017, The Authors. All rights reserved.

关键词： Refractive index

来源：评论

学校读者我要写书评

暂无评论

Rehabilitation with lower limb exoskeleton robot joint load adaptive server control

Rehabilitation with lower limb exoskeleton robot joint load ...

引用

International Conference on Information and Automation (ICIA)

作者： Shaomin Zhang Can Wang Ying Hu Duxin Liu Ting Zhang Xinyu Wu Key Laboratory of Human-Machine-Intelligence Synergic Systems Chinese Academy ot Sciences Shenzhen College of Advanced Technology University of Chinese Academy of Sciences Guangdong Provincial Key Laboratory of Robotics and Intelligent System Chinese Academy of Sciences Department of Mechanical and Automation The Chinese University of Hong Kong

ISBN: (纸本)9781509041039

In order to help spinal cord injury (SCI) patients to walk again, a medical robot exoskeleton have been developed to assist these patients to walk independently in SIAT, Shenzhen. The research of this article is exoskeleton robot single joint load adaptive servo control. Considering the volunteers, wearing an exoskeleton robot, joints have significant changes in load torque and the moment of inertia, so driving joints was designed based on fuzzy control. Load adaptive servo controller makes the robot in rows, counter rotating torque moment of inertia of change and change has a better adaptability, and improves the smoothness of joint movement. This method was tested and the test on SIAT exoskeletons, verify the feasibility of joint adaptive control algorithm.

关键词： Servomotors Legged locomotion Exoskeletons Torque DC motors

来源：评论

学校读者我要写书评

暂无评论

Motion control for a single-legged robot

Motion control for a single-legged robot

引用

International Conference on Advanced robotics and Mechatronics (ICARM)

作者： Ming Liu Xingneng Zhong Xin Wang Fei Chen Fusheng Zha Wei Guo State Key laboratory of Robotics and System Harbin Institute of Technology Harbin Province China College of Mechanic and Electronic Engineering Northeast Forestry University Harbin Heilongjiang Province China China Aerospace Science Shenzhen academy of aerospace technology Shenzhen Guangdong Province China Department of Advanced Robotics Istituto Italiano di Tecnologia Genoa Italy

New control methods are presented in this paper for a hopping single-legged robot in the 2D plane. It is aimed to keep the robot's movement stably, namely kinematic parameters oscillating in a small range. Body angle, hopping height and horizontal velocity respectively represent the control parameters of three degrees of freedom. Finally, a series of simulation experiments show that all the kinematic parameters are within the specified range.

关键词： Legged locomotion Springs Actuators Motion control Gravity

来源：评论

学校读者我要写书评

暂无评论

Protein-altering variants associated with body mass index implicate pathways that control energy intake and expenditure in obesity (vol 50, pg 765, 2017)

引用

NATURE GENETICS 2018年第5期50卷 765-766页

作者： Turcot, Valerie Lu, Yingchang Highland, Heather M. Schurmann, Claudia Justice, Anne E. Fine, Rebecca S. Bradfield, Jonathan P. Esko, Tonu Giri, Ayush Graff, Mariaelisa Guo, Xiuqing Hendricks, Audrey E. Karaderi, Tugce Lempradl, Adelheid Locke, Adam E. Mahajan, Anubha Marouli, Eirini Sivapalaratnam, Suthesh Young, Kristin L. Alfred, Tamuno Feitosa, Mary F. Masca, Nicholas G. D. Manning, Alisa K. Medina-Gomez, Carolina Mudgal, Poorva Ng, Maggie C. Y. Reiner, Alex P. Vedantam, Sailaja Willems, Sara M. Winkler, Thomas W. Abecasis, Goncalo Aben, Katja K. Alam, Dewan S. Alharthi, Sameer E. Allison, Matthew Amouyel, Philippe Asselbergs, Folkert W. Auer, Paul L. Balkau, Beverley Bang, Lia E. Barroso, Ines Bastarache, Lisa Benn, Marianne Bergmann, Sven Bielak, Lawrence F. Bluher, Matthias Boehnke, Michael Boeing, Heiner Boerwinkle, Eric Boger, Carsten A. Bork-Jensen, Jette Bots, Michiel L. Bottinger, Erwin P. Bowden, Donald W. Brandslund, Ivan Breen, Gerome Brilliant, Murray H. Broer, Linda Brumat, Marco Burt, Amber A. Butterworth, Adam S. Campbell, Peter T. Cappellani, Stefania Carey, David J. Catamo, Eulalia Caulfield, Mark J. Chambers, John C. Chasman, Daniel I. Chen, Yii-Der I. Chowdhury, Rajiv Christensen, Cramer Chu, Audrey Y. Cocca, Massimiliano Collins, Francis S. Cook, James P. Corley, Janie Galbany, Jordi Corominas Cox, Amanda J. Crosslin, David S. Cuellar-Partida, Gabriel D'Eustacchio, Angela Danesh, John Davies, Gail Bakker, Paul I. W. Groot, Mark C. H. Mutsert, Renee Deary, Ian J. Dedoussis, George Demerath, Ellen W. Heijer, Martin Hollander, Anneke I. Ruijter, Hester M. Dennis, Joe G. Denny, Josh C. Angelantonio, Emanuele Drenos, Fotios Du, Mengmeng Dube, Marie-Pierre Dunning, Alison M. Easton, Douglas F. Edwards, Todd L. Ellinghaus, David Ellinor, Patrick T. Elliott, Paul Evangelou, Evangelos Farmaki, Aliki-Eleni Farooqi, I. Sadaf Faul, Jessica D. Fauser, Sascha Feng, Shuang Ferrannini, Ele Ferrieres, Jean Florez, Jose C. Ford, Ian Fornage, Myriam Franco, Oscar H. Franke, Andre Franks, Paul W. Friedrich, Ne Montreal Heart Institute Université de Montréal Montreal Quebec Canada Division of Epidemiology Department of Medicine Vanderbilt-Ingram Cancer Center Vanderbilt Epidemiology Center Vanderbilt University School of Medicine Nashville TN USA Charles Bronfman Institute for Personalized Medicine Icahn School of Medicine at Mount Sinai New York NY USA Genetics of Obesity and Related Metabolic Traits Program Icahn School of Medicine at Mount Sinai New York NY USA Department of Epidemiology University of North Carolina Chapel Hill NC USA Human Genetics Center University of Texas School of Public Health University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences University of Texas Health Science Center at Houston Houston TX USA Broad Institute of MIT and Harvard Cambridge MA USA Department of Genetics Harvard Medical School Boston MA USA Division of Endocrinology and Center for Basic and Translational Obesity Research Boston Children’s Hospital Boston MA USA Center for Applied Genomics Division of Human Genetics Children’s Hospital of Philadelphia Philadelphia PA USA Quantinuum Research LLC San Diego CA USA Estonian Genome Center University of Tartu Tartu Estonia Division of Epidemiology Department of Medicine Institute for Medicine and Public Health Vanderbilt Genetics Institute Vanderbilt University Nashville TN USA Institute for Translational Genomics and Population Sciences LABioMed at Harbor-UCLA Medical Center Torrance CA USA Wellcome Trust Sanger Institute Hinxton UK Department of Mathematical and Statistical Sciences University of Colorado Denver CO USA Wellcome Trust Centre for Human Genetics University of Oxford Oxford UK Department of Biological Sciences Faculty of Arts and Sciences Eastern Mediterranean University Famagusta Cyprus Max Planck Institute of Immunobiology and Epigenetics Freiburg Germany Department of Biostatistics and Center for Statistical Genetics University of Michigan Ann Arbor

Genome-wide association studies (GWAS) have identified >250 loci for body mass index (BMI), implicating pathways related to neuronal biology. Most GWAS loci represent clusters of common, noncoding variants from which pinpointing causal genes remains challenging. Here we combined data from 718,734 individuals to discover rare and low-frequency (minor allele frequency (MAF) < 5%) coding variants associated with BMI. We identified 14 coding variants in 13 genes, of which 8 variants were in genes (ZBTB7B, ACHE, RAPGEF3, RAB21, ZFHX3, ENTPD6, ZFR2 and ZNF169) newly implicated in human obesity, 2 variants were in genes (MC4R and KSR2) previously observed to be mutated in extreme obesity and 2 variants were in GIPR. The effect sizes of rare variants are ~10 times larger than those of common variants, with the largest effect observed in carriers of an MC4R mutation introducing a stop codon (***35Ter, MAF = 0.01%), who weighed ~7 kg more than non-carriers. Pathway analyses based on the variants associated with BMI confirm enrichment of neuronal genes and provide new evidence for adipocyte and energy expenditure biology, widening the potential of genetically supported therapeutic targets in obesity.

关键词： Genome-wide association studies Obesity

来源：评论

学校读者我要写书评

暂无评论

Tetrahedral framework registration algorithm for the robot-assisted surgical navigation system

Tetrahedral framework registration algorithm for the robot-a...

引用

International Conference on Information and Automation (ICIA)

作者： Jiebao Zhu Yu Sun Peng Gao Kailin Ma Ying Hu Yong Cao Department of Mechanical Engineering and Automation Shenzhen Graduate School Guangdong Provincial Key Laboratory of Robotics and Intelligent System Harbin Institutes of Technology Shenzhen Graduate School CAS The Chinese University of Hong Kong Jiaotong University

ISBN: (纸本)9781509041039

The accuracy of registration is one of the key issues in surgical navigation, which directly affects the result of operation. In this paper, we proposed a new registration algorithm, Tetrahedral Framework (TF), to improve precision and computing speed and conducted a calibration experiment by using the wax model with markers. The image data are obtained by Micro-CT scanning and loaded in VTK to gain the coordinate of the markers, while the tracking data in real space are collected from NDI equipment. The proposed TF algorithm can be described as follow. Firstly, the two point-sets are respectively divided into a tetrahedral framework part and a few of particles; secondly, the scale coefficient is calculated for mapping the image data into the real space; finally, the particle swarm optimization (PSO) is used to adjust the positions and attitude of image framework to acquire a maximal projection on the tracking framework planes. In order to improve the precision of registration, we combined the particles information in an optimization process. Besides, the experimental results show that the algorithm can satisfy the requirement in surgical navigation.

关键词： Navigation Mathematical model Robot kinematics Algorithm design and analysis Surgery Heuristic algorithms

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：