检索结果-内蒙古大学图书馆

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2015年 9339卷 601-612页

作者： Lesinski, Wojciech Jastrzebska, Agnieszka University of Bialystok ul. Konstantego Ciolkowskiego 1M Bialystok15-245 Poland Warsaw University of Technology ul. Koszykowa 75 Warsaw00-662 Poland

ISBN: (纸本)9783319243689

The article is focused on a particular aspect of classification, namely the issue of class imbalance. Imbalanced data adversely affects the recognition ability and requires proper classifier’s construction. In this work we present a case of music notation as an example of imbalanced data. Three classification algorithms-random forest, standard SVM and cost-sensitive SVM are described and tested. Feature selection based on random forest feature importance was used. Also, feature dimension reduction using PCA was studied. © IFIP International Federation for information processing 2015.

关键词： Decision trees

来源：评论

学校读者我要写书评

暂无评论

On-board real-time optic-flow for miniature event-based vision sensors

On-board real-time optic-flow for miniature event-based visi...

引用

IEEE International conference on Robotics and Biomimetics

作者： J. Conradt Department of Electrical and Computer Engineering Technische Universität München München Germany

ISBN: (纸本)9781467396769

This paper presents a novel, drastically simplified method to compute optic flow on a miniaturized embedded vision system, suitable on-board of miniaturized indoor flying robots. Estimating optic flow is a common technique for robotic motion stabilization in systems without ground contact, such as unmanned aerial vehicles (UAVs). Because of high computing power requirements to process video camera data, most optic flow algorithms are implemented off-board on PCs or on dedicated hardware, connected through tethered or wireless links. Here, in contrast, we present a miniaturized stand-alone embedded system that utilizes a novel neuro-biologically inspired event-based vision sensor (DVS) to extract optic flow on-board in real-time with minimal computing requirements. The DVS provides asynchronous events that resemble temporal contrast changes at individual pixel level, instead of full image frames at regular time intervals. Such a representation provides high temporal resolution while simultaneously reducing the amount of data to be processed. We present a simple algorithm to extract optic flow information from such event-based vision data, which is sufficiently efficient in terms of data storage and processing power to be executed on an embedded 32bit ARM7 microcontroller in real-time. The developed stand-alone system is small, lightweight and energy efficient, and is ready to serve as sensor for ego motion estimates based on optic flow in autonomous UAVs.

关键词： optical sensors optical imaging Voltage control Biomedical optical imaging Robot sensing systems

来源：评论

学校读者我要写书评

暂无评论

Combustion chamber neural adaptive control using optical descriptors 18

Combustion chamber neural adaptive control using optical des...

引用

18th IEEE conference on Signal processing - algorithms, Architectures, Arrangements, and Applications (SPA)

作者： Gromaszek, Konrad Kotyra, Andrzej Lublin Univ Technol Inst Elect & Comp Sci Lublin Poland

ISBN: (纸本)9788362065189

The paper discusses the conditions for the development of the combustion process control system and presents an algorithm to optimize the boiler operation based on information obtained from conventional instrumentation and incorporate model reference control scheme to assess the quality of the process, Comparative studies between two simulated MRAC systems show that neural adaptive control may mitigate disturbances on the system outputs,

关键词： Neural networks adaptive control complex system cocombustion optical signals

来源：评论

学校读者我要写书评

暂无评论

Performance and Complexity Comparison of Carrier Phase Estimation algorithms for DP-64-QAM optical Signals

Performance and Complexity Comparison of Carrier Phase Estim...

引用

European conference on optical Communication (ECOC)

作者： Bilal, S. M. Zhong, K. P. Cheng, J. Lau, Alan Pak Tao Bosco, G. Lu, C. Politecn Torino DET Corso Duca Abruzzi 24 Turin Italy Hong Kong Polytech Univ Photon Res Ctr Hong Kong Hong Kong Peoples R China Huazhong Univ Sci & Technol Next Generat Internet Access Natl Engn Lab Wuhan 430074 Peoples R China

A detailed simulative and experimental analysis of different CPE schemes for 64-QAM systems is presented. The best compromise between linewidth tolerance and complexity is achieved using a recently proposed multi-stag... 详细信息

ISBN: (纸本)9781479930661

关键词： optical communication optical information processing optical modulation phase estimation quadrature amplitude modulation CPE schemes DP-64-QAM optical signals carrier phase estimation algorithms linewidth tolerance multistage architecture standard V&V algorithm Algorithm design and analysis Complexity theory Maximum likelihood estimation optical receivers Partitioning algorithms Phase estimation Signal to noise ratio

来源：评论

学校读者我要写书评

暂无评论

Non-Linear Compensation of Production Inaccuracies and Material Drift by Adjusting the Sensor Data Fusion algorithms for Shape Sensing Based on FBG-optical Fibers

Non-Linear Compensation of Production Inaccuracies and Mater...

引用

International conference on Multisensor Fusion and information Integration for Intelligent systems (MFI)

作者： Pauer, Hendrikje Ledermann, Christoph Tuschmann, Wilderich Woern, Heinz Karlsruhe Inst Technol Inst Anthropomat & Robot Intelligent Proc Control D-76021 Karlsruhe Germany Karlsruhe Inst Technol Inst Algebra & Geometry D-76021 Karlsruhe Germany

ISBN: (纸本)9781479967315

Shape sensing, where the shape of an object is estimated using fiber optical Fiber Bragg Grating (FBG) sensors, has gained increasing popularity in the last years. While the production process and the applications are different for the various research groups, the basic principle of shape sensing is the same: at certain cross-sections along the observed object, the information of three strain measurements is merged to one curvature information, and the information of these curvatures is then used to estimate the shape with various mathematical theories, depending on the application. Some effort has been made to calibrate and determine the accuracy of the shape sensor, but research on the influence of bad positioning of the Fiber Bragg Gratings seems relatively unattended. In this paper, one aspect of bad FBG positioning, namely inaccurate placement of the FBGs within one cross-section, and its influence on the reconstruction results is investigated. Furthermore, a modified approach for the reconstruction algorithm is presented, improving the reconstruction results for bad FBG placement compared to the conventional approach.

关键词： Bragg gratings fibre optic sensors sensor fusion FBG-optical fibers fiber Bragg grating material drift mathematical theories sensor data fusion algorithms shape sensing Fiber gratings Gratings Robot sensing systems Shape Strain

来源：评论

学校读者我要写书评

暂无评论

Fast Decoding and LLR-computation algorithms for High-order Set-partitioned 4D-QAM Constellations

Fast Decoding and LLR-computation Algorithms for High-order ...

引用

European conference on optical Communication

作者： Shota Ishimura Kazuro Kikuchi Tokyo Daigaku Bunkyo-ku Tokyo JP Department of Electrical Engineering and Information Systems University of Tokyo

We propose digital-signal-processing algorithms that achieve fast decoding and LLR-computation for high-order set-partitioned 4D-QAM formats based on their parity-check functions. Computer-simulation results show that computational complexity of the decoder can significantly be reduced with negligible power penalty using such algorithms.

关键词： Bit error rate Modulation Maximum likelihood decoding Computational complexity Parity check codes Computer simulation

来源：评论

学校读者我要写书评

暂无评论

COMPRESSIVE SPECTRAL IMAGING WITH COLORED-PATTERNED DETECTORS

COMPRESSIVE SPECTRAL IMAGING WITH COLORED-PATTERNED DETECTOR...

引用

IEEE International conference on Acoustics, Speech and Signal processing (ICASSP)

作者： Correa, Claudia V. Arguello, Henry Arce, Gonzalo R. Univ Delaware Dept Elect & Comp Engn Newark DE 19716 USA Univ Ind Santander Columbia MD USA

ISBN: (纸本)9781479928934

Compressive spectral imaging captures the spatial and spectral information of a scene using a set of two-dimensional random projections. Compressed sensing reconstruction algorithms are then used to recover the underlying threedimensional source. This work presents a new generation of devices that attain compressive spectral image measurements by means of a colored-patterned detector and a dispersive element. Simulations show that these new generation devices can recover spectral scenes with up to 5 dB gain in PSNR with respect to traditional Coded Aperture Snapshot Spectral Imaging (CASSI) systems.

关键词： Colored patterned detectors compressive spectral imaging optical filters

来源：评论

学校读者我要写书评

暂无评论

Election algorithms applied to the global aggregation in networks of comparators

Election algorithms applied to the global aggregation in net...

引用

2014 Federated conference on Computer Science and information systems, FedCSIS 2014

作者： Sosnowski, Lukasz Pietruszka, Andrzej azowy, Stanislaw Dituel Sp. Z O.o ul. Ostrobramska 101 lok. 206 Warsaw04-041 Poland Systems Research Institute Polish Academy of Sciences ul. Newelska 6 Warsaw01-447 Poland Institute of Mathematics University of Warsaw ul. Banacha 2 Warsaw02-097 Poland Section of Computer Science Main School of Fire Service ul. Slowackiego 52/54 Warsaw01-629 Poland

ISBN: (纸本)9788360810583

The paper shows the application of election algorithms in networks of comparators. We have described and adopted six election methods which have been used as an aggregator of partial results. We have performed experiments on the data gathered at the fire ground. All of them have been well described and results have been compared. The paper includes a discussion and interpretation of results obtained. It indicates the algorithm with the greatest potential to adapt and to obtain the best results. © 2014 Polish information processing Society.

关键词： Comparators (optical)

来源：评论

学校读者我要写书评

暂无评论

Real-time information processing method and its application in optical target tracking system

Real-time information processing method and its application ...

引用

2014 2nd International conference on Mechatronics, Robotics and Automation, ICMRA 2014

作者： Xie, Fu Zhen School of Mechanical Engineering Xinyu University Xinyu Jiangxi 338004 China

ISBN: (纸本)9783038350781

optical information processing systems have been widely applied, this paper studies the calculation of the amount of a reduction in the use of genetic algorithms to increase the diversity of the sample algorithm to reduce problems caused by the sample dilution with a resampling method, combined with the finite field resampling, resampling constitute a finite field of genetic algorithms. We using surface to capture the dynamics of template update, to prevent inappropriate tracking results into the template set, pending the outcome of the tracking template is added to the first test for cover. Detect occlusion control template updates. Prevent tracking results of drift. © (2014) Trans Tech Publications, Switzerland.

关键词： Target tracking

来源：评论

学校读者我要写书评

暂无评论

Improved Decision Directed Carrier Phase Estimation for Nonlinearity Mitigation in 16-QAM systems

Improved Decision Directed Carrier Phase Estimation for Nonl...

引用

16th International conference on Transparent optical Networks (ICTON)

作者： Pakala, Lalitha Schmauss, Bernhard Univ Erlangen Nurnberg Inst Microwaves & Photon LHFT Erlangen Grad Sch Adv Opt Technol SAOT Fiber Opt Transmiss & Sensing FiTS D-91054 Erlangen Germany

ISBN: (纸本)9781479956012

We propose and numerically investigate an improved decision directed (IDD) carrier phase estimation (CPE) to mitigate fiber nonlinearity in 16 quadrature amplitude modulation (QAM) coherent transmission systems. The proposed IDD-CPE algorithm is derived based on a two stage approach and compared with other CPE algorithms namely, the pre-decision directed (PDD) CPE and the decision directed (DD) phase locked loop (PLL). By exploiting the symbol position information in the I-Q plane and a euclidean distance measure, the proposed IDD-CPE algorithm outperforms the PDD-CPE and DD-PLL methods, exhibiting an optimal performance at signal launch power of 0 dBm and at optical signal to noise ratios (OSNRs) greater than 28dB, where no bit errors are detected.

关键词： Carrier phase estimation digital signal processing nonlinear mitigation coherent receivers 16-QAM decision directed

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：