检索结果-内蒙古大学图书馆

2019 IEEE International Conference on Unmanned Systems, ICUS 2019

作者： Wu, Tiancai Wang, Honglun Li, Na Yu, Yue Wu, Jianfa Beihang University School of Automation Science and Electrical Engineering Shenyuan Honors College Beijing China Beihang University Sch. of Automat. Sci. and Elec. Engineering Science and Technology on Aircraft Control Laboratory Beijing China Beihang University Unmanned Systems Research Institute Beijing China Beijing Aerospace Automatic Control Institute Beijing China

ISBN: (纸本)9781728137926

In this paper, a robust adaptive back-stepping attitude controller is investigated for hypersonic reentry vehicle under unknown parameters and external disturbances. Firstly, the affine nonlinear system of HRV is established in the form of a cascade structure. Secondly, the robust attitude controller based on linear extended state observer, back-stepping method and adaptive control technique is proposed. An adaptive strategy is applied to identify the unknown parameters. Linear extended state observer is applied to observe and compensate the intricate external disturbances. Control law and parameter adaptive law can be obtained, and the stability of closed-loop control system can be guaranteed by choosing the appropriate Lyapunov function. Finally, simulation results and discussions are presented to verify the effectiveness of the proposed control strategy. © 2019 IEEE.

关键词： Attitude control

来源：评论

学校读者我要写书评

暂无评论

Optimum detection for a class of stationary meteorological radars 26

Optimum detection for a class of stationary meteorological r...

引用

26th European Signal Processing Conference, EUSIPCO 2018

作者： García, Fernando Darío Almeida Miranda, Marco Antonio Miguel Filho, José Cândido Silveira Santos Sch. of Elec. and Computer Engineering University of Campinas Campinas SP Brazil Bradar Indústria S.A CampinasSP Brazil

ISBN: (纸本)9789082797015

Recently, an innovative low-cost approach for the construction of meteorological radars has been introduced by exploiting the correlation between the received signals from two fixed wide-beam antennas. Yet, it was then found that a very large amount of signal samples would be required to ensure a satisfactory performance of the proposed radar. On the other hand, it was also envisaged that such a problem could be circumvented by the use of more than two antennas. This work is a first step in this direction, extending the original radar proposal from two to an arbitrary number of antennas. In addition to designing an optimum detector for the new radar, we assess its performance by deriving asymptotic, closed-form expressions for the resulting detection and false-alarm probabilities. As a term of comparison, we also design and analyze a suboptimal detection sch.me based on the traditional phased-array approach. Numerical examples are given to validate the provided analysis and to illustrate the performance gain achieved from the use of additional antennas. © EURASIP 2018.

关键词： Meteorological radar

来源：评论

学校读者我要写书评

暂无评论

On Unified Vehicular Communications and Radar Sensing in Millimeter-Wave and Low Terahertz Bands

arXiv

引用

arXiv 2019年

作者： Petrov, Vitaly Fodor, Gabor Kokkoniemi, Joonas Moltchanov, Dmitri Lehtomaki, Janne Andreev, Sergey Koucheryavy, Yevgeni Juntti, Markku Valkama, Mikko Ericsson Res. and Sch. of Elec. Eng. and Computer Science of Kth Royal Institute of Technology Sweden Tampere University Finland Centre for Wireless Communications University of Oulu Oulu Finland

Future smart vehicles will incorporate high-datarate communications and high-resolution radar sensing capabilities operating in the millimeter-wave and higher frequencies. These two systems are preparing to share and reuse a lot of common functionalities, such as steerable millimeter-wave antenna arrays. Motivated by this growing overlap, and advanced further by the space and cost constraints, the vehicular community is pursuing a vision of unified vehicular communications and radar sensing, which represents a major paradigm shift for nextgeneration connected and self-driving cars. This article outlines a path to materialize this decisive transformation. We begin by reviewing the latest developments in hybrid vehicular communications and radar systems, and then propose a concept of unified channel access over millimeter-wave and higher frequencies. Our supporting system-level performance characterization relies upon real-life measurements and massive ray-based modeling to confirm the significant improvements brought by our proposal to mitigating the interference and deafness effects. Since our results aim to open the door to unified vehicular communications and radar sensing, we conclude by outlining the potential research directions in this rapidly developing field. Copyright © 2019, The Authors. All rights reserved.

关键词： Millimeter waves

来源：评论

学校读者我要写书评

暂无评论

Interactive visualization of the cranio-cerebral correspondences for 10/20, 10/10 and 10/5 systems 29

Interactive visualization of the cranio-cerebral corresponde...

引用

29th SIBGRAPI Conference on Graphics, Patterns and Images, SIBGRAPI 2016

作者： Silva, Jose Angel Ivan Rubianes Burgos, Fabio Enrique Suarez Shin-Ting, Wu Sch. of Elec. and Computer Engineering University of Campinas Campinas Brazil School of Medical Science University of Campinas Campinas Brazil

ISBN: (纸本)9781509035687

elec.roencephalogram (EEG) is a method that records elec.rical activities of the brain. Reliable interpretation of its measurements rely on accurate correspondence of the scalp elec.rodes and the underlying cortical surface. To standardize comparative studies international 10/20, 10/10 and 10/5 systems for the placement of elec.rodes have been proposed to specify the locations of scalp EEG sensors under the assumption that there is a consistent correlation between these sites and the structure of the cerebral cortex. However, several studies have demonstrated that the cranio-cerebral correlations vary greatly. For enhancing the elec.rophysiological analyses, an algorithm is presented in this paper, allowing the multimodal visualization of EEG and magnetic resonance scan in the patient's native space. The key to our solution is twofold: An interactive imagebased elec.rode placement algorithm and an extended GPU-based multimodal raycasting algorithm. Experimental results show that with the present tool one can easily assess the cranio-cerebral correspondences even when the brain tissue is displaced by structural lesions. © 2016 IEEE.

关键词： Graphics processing unit

来源：评论

学校读者我要写书评

暂无评论

Interactive Visualization of the Cranio-Cerebral Correspondences for 10/20, 10/10 and 10/5 Systems

Interactive Visualization of the Cranio-Cerebral Corresponde...

引用

Brazilian Symposium on computer Graphics and Image Processing (SIBGRAPI)

作者： José Angel Iván Rubianes Silva Fabio Enrique Suarez Burgos Shin-Ting Wu Sch. of Elec. & Comput. Eng. Universidade Estadual de Campinas Campinas SP BR Sch. of Med. Sci. Universidade Estadual de Campinas Campinas SP BR Sch. of Elec. and Computer Engineering University of Campinas Campinas Brazil

elec.roencephalogram (EEG) is a method that records elec.rical activities of the brain. Reliable interpretation of its measurements rely on accurate correspondence of the scalp elec.rodes and the underlying cortical surface. To standardize comparative studies international 10/20, 10/10 and 10/5 systems for the placement of elec.rodes have been proposed to specify the locations of scalp EEG sensors under the assumption that there is a consistent correlation between these sites and the structure of the cerebral cortex. However, several studies have demonstrated that the cranio-cerebral correlations vary greatly. For enhancing the elec.rophysiological analyses, an algorithm is presented in this paper, allowing the multimodal visualization of EEG and magnetic resonance scan in the patient's native space. The key to our solution is twofold: an interactive image-based elec.rode placement algorithm and an extended GPU-based multimodal ray-casting algorithm. Experimental results show that with the present tool one can easily assess the cranio-cerebral correspondences even when the brain tissue is displaced by structural lesions.

关键词： elec.rodes Scalp elec.roencephalography Rendering (computer graphics) Magnetic resonance imaging Correlation Surface reconstruction

来源：评论

学校读者我要写书评

暂无评论

Active sealing for soft polymer microchips

Active sealing for soft polymer microchips

引用

2006 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2006 Technical Proceedings

作者： Bang, Hyunwoo Lee, Won Gu Park, Junha Yun, Hoyoung Lee, Joonmo Chung, Seok Cho, Keunchang Chung, Chanil Han, Dong-Chul Chang, Jun Keun School of Mechanical and Aerospace Engineering Seoul National University Seoul 151-742 Korea Republic of Digital Bio Technology Co. Seoul 151-742 Korea Republic of Sch. of Elec. Engineering and Computer Science Seoul National University Seoul 151-742 Korea Republic of

This paper presents a new sealing method for soft polymer (elastomer) microchips. A robust and reversible sealing method, which allows various materials to be bonded and sealed tightly with each other even in aqueous solutions, is developed. A poly (dimethylsiloxane) (PDMS) microchip system, which can actively generate bonding and sealing forces by itself, is invented. By inducing negative pressure into additional closed areas, an instant sucking disk is made. This disk is used to tighten up the conformal contact of soft polymers. Other functionalities of active sealing such as making reusable microchips, patterning cells, and performing cellular assays in a single dish have also been examined and will be discussed hereunder. This technique gives a robust and universal solution for microchip sealing issues by sealing soft polymers with diverse materials in various conditions. Active sealing will simplify numerous assays in lab-on-a-chip industry and will open a new era for cellular microchip assays.

关键词： Elastomers

来源：评论

学校读者我要写书评

暂无评论

A throughput-based adaptive MIMO-BICM approach for spatially-correlated channels

A throughput-based adaptive MIMO-BICM approach for spatially...

引用

2006 IEEE International Conference on Communications, ICC 2006

作者： McKay, Matthew R. Collings, Iain B. Forenza, Antonio Heath, Robert W. Telecommunications Lab. Sch. of Elec. and Info. Engineering University of Sydney Australia Wireless Technologies Lab. ICT Centre CSIRO Australia Freescale Semiconductor Inc. Austin TX United States Wireless Networking and Communications Group Dept. of Electrical and Computer Engineering University of Texas Austin TX United States

ISBN: (纸本)1424403553

This paper considers low complexity transmission for MIMO bit-interleaved coded modulation (BICM) in spatially-correlated Rayleigh channels. We consider both statistical beam-forming (SB) and spatial-multiplexing with a zero-forcing (ZF) receiver. We derive tight closed-form bit error rate (BER) expressions based on a saddlepoint approximation. We then propose a practical adaptive algorithm which selec.s, based on the analytical results, the combination of code-rate, modulation format, and MIMO transmission sch.me (SB or ZF) that maximizes throughput whilst maintaining a pre-defined BER. © 2006 IEEE.

关键词： Channel estimation

来源：评论

学校读者我要写书评

暂无评论

computer networks: Editorial

引用

computer Networks 2005年第4期47卷 443-444页

作者： Akyildiz, Ian F. Rudin, Harry Broadband Wireless Networking Lab. Sch. Elec. and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 United States

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

A combinatorial auction among versatile experts and amateurs

引用

Transactions of the Japanese Society for Artificial Intelligence 2005年第2期20卷 84-93页

作者： Ito, Takayuki Yokoo, Makoto Matsubara, Shigeo Graduate School of Engineering Nagoya Institute of Technology Grad. Sch. Info. Sci. and Elec. Eng. Kyusyu University NTT Commun. Science Laboratories

Auctions have become an integral part of elec.ronic commerce and a promising field for applying multi-agent technologies. Correctly judging the quality of auctioned goods is often difficult for amateurs, in particular, in Internet auctions. However, experts can correctly judge the quality of goods. In this situation, it is difficult to make experts tell the truth and attain an efficient allocation, since experts have a clear advantage over amateurs and they would not reveal their valuable information without some reward. In our previous work, we have succeeded in developing such auction protocols under the following two cases: (1) the case of a single-unit auction among experts and amateurs, and (2) the case of a combinatorial auction among single-skilled experts and amateurs. In this paper, we focus on versatile experts. Versatile experts have an interest in, and expert knowledge on the qualities of several goods. In the case of versatile experts, there would be several problems, e.g., free riding problems, if we simply extended the previous VCG-style auction protocol. Thus, in this paper, we employ PORF (price-oriented, rationing-free) protocol for designing our new protocol to realize a strategy-proof auction protocol for experts. In the protocol, the dominant strategy for experts is truth-telling. Also, for amateurs, truth-telling is the best response when two or more experts selec. the dominant strategy. Furthermore, the protocol is false-name-proof.

关键词： elec.ronic commerce

来源：评论

学校读者我要写书评

暂无评论

An evaluation of warping techniques applied to partial envelope analysis

An evaluation of warping techniques applied to partial envel...

引用

International computer Music Conference, ICMC 2005

作者： Timoney, Joseph Lysaght, Tom MacManus, Lorcan Lazzarini, Victor Dept. of Computer Science NUI Maynooth Maynooth Co. Kildare Ireland Sch. of Elec. and Comms. Eng. DIT Kevin St. Dublin Ireland Department of Music NUI Maynooth Maynooth Co. Kildare Ireland

Traditional methods for partial envelope analysis run into difficulties in the presence of tremolo and noise. This paper investigates an alternative method of analysis that uses a variety of non-linear warping techniques to match a synthetic envelope template to the partial envelope. Generation of suitable templates is discussed and the variety of implementations for the warping algorithm is examined. A complete procedure for matching the template is then explained and justified. Application of this procedure to partial envelope analysis of flute sounds is described and the results presented demonstrate the best choice of warping implementation. This technique allows for better envelope segmentation thus enabling improved modelling in representations such as the Timbre Model [1].

关键词：

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：