检索结果-内蒙古大学图书馆

Asia-Pacific Microwave Conference

作者： Lulu Cheng Jie Xu Zhixiang Huang Xianliang Wu Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University

ISBN: (纸本)9781479987689

Quantum-well infrared photodetectors have been studied extensively due to their night vision, astronomy and environmental monitoring research in recent years. However, responsivity and detectivity are relatively low in these photodetectors without the Au gratings. Therefore, the Au grating will be employed on the surface of photodetector with periodic structure due to the principle of spoof plasmon resonance. The new design mainly aims to enhance the absorption in the QW active region based on the Au grating and can be numerically simulated by using finite-difference frequency-domain method. With optimal grating parameters, the absorption can be enhanced by 250 times compared with that in the reference structure without grating. The theoretical results provide the realistic organic infrared photodetectors with theoretical basis and technical support.

关键词： Au grating Photodetector Finite-difference frequency-domain Plasmon resonance

来源：评论

学校读者我要写书评

暂无评论

Analysis of Periodic Structures at Oblique Incidence by Iterated Finite-Difference Time-Domain Method

Analysis of Periodic Structures at Oblique Incidence by Iter...

引用

Asia-Pacific Microwave Conference

作者： Chenyang Shen Ming Fang Zhixiang Huang Xianliang Wu Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui University

ISBN: (纸本)9781479987689

An iterated FDTD method is shown here which can be used for analysis of periodic structures at oblique incidence. The main principle of the algorithm is that the future field for the current iteration is replaced approximately by the field produced in the previous iteration with the time-shifted method. The calculated reflection coefficient of infinite gold plate agrees well with the analytical solution. Furthermore, the method is introduced into the simulation of three dimensional dispersive structure, and the ultra-transmission phenomenon of the structure with nano cylinder on silicon surface is verified theoretically. The results clearly show that the method overcomes the shortcomings compared with traditional method by the limitation of incidence angle, the lack of time domain field evolution procession and the need for large meshes, which provides a new solution for the transmission properties of dispersive periodic structures under oblique incidence conditions.

关键词： oblique incidence Periodic structures Transmission Characteristics Finite difference time domain method TimeDif angle of incidence Reflection coefficient TRADITIONAL METHODS Analysis

来源：评论

学校读者我要写书评

暂无评论

An efficient co-evolutionary particle swarm optimizer for solving multi-objective optimization problems

An efficient co-evolutionary particle swarm optimizer for so...

引用

第27届中国控制与决策会议

作者： Daqing Wu Li Liu Xiang Jian Gong Li Deng Key Laboratory of Intelligent Computing & Signal Processing Ministry of EducationAnhui University Computer Science and Technology Institute University of South China Glorious Sun School of Business and Management Dong Hua University

An efficient co-evolutionary multi-objective particle swarm optimizer named ECMPSO was *** uses dynamic multiple swarms to deal with multiple objectives,taking one objective is optimized by each swarm into account,and maintains diversity of new found non-dominated solutions via adopts a three-level particle swarm optimization(PSO) updating rule wherein the particles learn their experiences based on personal,neighborhood,and external *** prove the validity of the ECMPSO algorithm for solving multi-objective problems,some benchmark problems and one real-life problem are selected to validate the performance of the ECMPSO *** experiment results show that the ECMPSO algorithm is better in terms of search precision and convergence performance than other three algorithms from the literature.

关键词： Multi-objective Optimization,Particle Swarm Optimizer,Neighborhood Best Particle,Dynamic Swarms,Economic Environmental Dispatch

来源：评论

学校读者我要写书评

暂无评论

iHEARu-PLAY: Introducing a game for crowdsourced data collection for affective computing

iHEARu-PLAY: Introducing a game for crowdsourced data collec...

引用

International Conference on Affective computing and intelligent Interaction and Workshops, ACII

作者： Simone Hantke Florian Eyben Tobias Appel Björn Schuller Chair of Complex & Intelligent Systems University of Passau Germany Machine Intelligence & Signal Processing Group Technische Universitat Munchen Germany Audeering UG Gilching Germany Department of Computing Imperial College London UK

ISBN: (纸本)9781479999545

We introduce iHEARu-PLAY, a web-based multi-player game for crowdsourced database collection and - most important - labelling. Existing databases (with speech and video content) can be added to the game and labelling tasks can be defined via a web-interface. The primary purpose of iHEARu-PLAY is multi-label, holistic annotation of multi-modal affective speech databases. Players perform labelling (or prompted recording) tasks and are rewarded with scores and prizes, which are computed based on the “correctness” of their annotations, e.g., the agreement with a pre-defined gold standard or with the other players. iHEARu-PLAY is implemented with the open source high-level Python Web framework Django and can be installed on Unix and Windows platforms. Its modular architecture allows for easy integration of custom extensions: New gaming components can be added as plugins in order to support new databases and modalities. Label categories for each database are individually selectable and editable. Audio, image and video annotation are currently supported. iHEARu-PLAY will be available to the research community as a ready-to-use web-service. Researchers can add their own databases, optionally post rewards, and receive annotation results in the end. General users can register to play the game, have fun, compete with other players, and at the same time support science.

关键词： Games Databases Labeling Crowdsourcing Affective computing Speech Artificial intelligence

来源：评论

学校读者我要写书评

暂无评论

Uniplanar coupled-feed printed PIFA for LTE/WWAN operation in the laptop computer

Uniplanar coupled-feed printed PIFA for LTE/WWAN operation i...

引用

2013 International Conference on Communication Technology, ICCT 2013

作者： Zhang, Sai Li, Minquan Rong, Bo Chang, Haixing Peng, Meng Ding, You Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei China

ISBN: (纸本)9781845648633

A new uniplanar printed PIFA with a coupled-feed structure for LTE/WWAN operation is proposed. The PIFA consists of a coupled-feed loop structure and two separated radiators which are able to generate additional bands for the operation. The loop antenna path and the longer radiator can produce a dualresonance generating the required lower band exactly, while three wide bands contributed by the loop path, the loop path with the longer radiator and the loop path with the shorter radiator can form an operating band to cover the (1710-2690 MHz) band. Because of the small size of only 14×70 mm2, the antenna which can cover the required eight bands is therefore very suitable for the modern Ultra-thin laptops. © 2014 WIT Press.

关键词： Radiators

来源：评论

学校读者我要写书评

暂无评论

Dynamic clustering algorithm in mobile wireless sensor network

引用

Journal of Information and Computational Science 2015年第13期12卷 4897-4907页

作者： Wang, Bingting Liang, Hui Lin, Qibin Zhang, Yangyi Wang, Yujie Hong, Peilin Hu, Yanjun Department of Electronic and Electrical Engineering Chuzhou University Chuzhou China Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei China Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei China

In this paper, we analyzed the blindness of traditional clustering algorithms, which select cluster head based on residual energy. Then we proposed the Dynamic Clustering Algorithm (DCA) in Mobile Wireless Sensor Network, which takes into consideration residual buffer level when selecting cluster heads and allots time slots dynamically base on the occupied buffer level. We analyzed the energy model of the proposed DCA algorithm and calculated the optimal distance between cluster heads. Simulation results show that our DCA clustering algorithm has good performances in terms of residual energy, data transmission and network lifetime by comparing it with LEACH and LEACH-CI. ©, 2015, Journal of Information and Computational Science. All right reserved.

关键词： Clustering algorithms

来源：评论

学校读者我要写书评

暂无评论

Nonlinear dynamics in high-speed wireless networks congestion control model with TCP logwestwood+ under RED

引用

Journal of Networks 2014年第7期9卷 1714-1720页

作者： Xu, Xianfan Guo, Fan Ding, Dawei Qiu, Sen Zhang, Kun Zhang, Haixu School of Electronics and Information Engineering Anhui University Hefei 230601 China Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui University Hefei 230039 China

In this paper, we proposed a first-order discrete time nonlinear dynamic model of congestion control system with TCP LogWestwood+ (TCPLog) connections and random early detection (RED) gateway in high-speed wireless networks. The model is used to analyze nonlinear dynamics of the TCPLog/RED network and its stability with respect to various RED controller and system parameters. Bifurcation and chaos behaviors are shown to occur when parameters varied. By theoretical derivation, the fixed point and the critical value are obtained, and the nature of the bifurcation is determined. Furthermore, bifurcation diagrams and Lyapunov exponent are exploited to verify the theoretical results. Finally, the bifurcation and chaotic phenomena of the congestion control system are numerically studied with TCPLog connections and RED gateway. © 2014 ACADEMY PUBLISHER.

关键词： Dynamics

来源：评论

学校读者我要写书评

暂无评论

Non-linear prediction with LSTM recurrent neural networks for acoustic novelty detection

Non-linear prediction with LSTM recurrent neural networks fo...

引用

International Joint Conference on Neural Networks (IJCNN)

作者： Erik Marchi Fabio Vesperini Felix Weninger Florian Eyben Stefano Squartini Björn Schuller Machine Intelligence & Signal Processing Group TU München Germany A3LAB Università Politecnica delle Marche Italy Department of Computing Imperial College London UK Chair of Complex and Intelligent Systems University of Passau Germany

Acoustic novelty detection aims at identifying abnormal/novel acoustic signals which differ from the reference/normal data that the system was trained with. In this paper we present a novel approach based on non-linear predictive denoising autoencoders. In our approach, auditory spectral features of the next short-term frame are predicted from the previous frames by means of Long-Short Term Memory (LSTM) recurrent denoising autoencoders. We show that this yields an effective generative model for audio. The reconstruction error between the input and the output of the autoencoder is used as activation signal to detect novel events. The autoencoder is trained on a public database which contains recordings of typical in-home situations such as talking, watching television, playing and eating. The evaluation was performed on more than 260 different abnormal events. We compare results with state-of-the-art methods and we conclude that our novel approach significantly outperforms existing methods by achieving up to 94.4% F-Measure.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Phase retrieval technology under partially coherent optical field based on lens model

引用

Guangdianzi Jiguang/Journal of Optoelectronics Laser 2014年第11期25卷 2239-2244页

作者： Cheng, Hong Zhang, Fen Liu, Kai-Feng Zhang, Quan-Bing Wei, Sui Key Laboratory of Intelligent Computing and Signal Processing Ahhui University Hefei China

The transport of intensity equation (TIE) is solved to recover the phase information through the combination of optics and calculation with the method of phase retrieval based on the intensity measurement. It is proved to be a feasible way to obtain phase information theoretically and experimentally. The sensitivity and resolution problems because of the interferometry techniques are avoided. However, the method is derived under the assumption of coherent illumination. It is difficult to expand it to the partially coherent optical field. A partially coherent optical field at any point in the space experiences statistical fluctuations over time. To fully characterize this field, correlations between pairs of points need to be used. Combining the phase modulation of lens and characteristics of partially coherent field, a new phase retrieval method under partially coherent illumination based on the lens imaging model is deduced. Finally, the phase retrieval results are given under uniform and non-uniform illumination. Experimental results verify that this new phase retrieval method is reasonable and correct. The application of traditional phase retrieval algorithm on transport of intensity equation is extended.

关键词： Lenses

来源：评论

学校读者我要写书评

暂无评论

A hybrid differential evolution algorithm solving complex multimodal optimization problems

引用

Journal of Information and Computational Science 2015年第13期12卷 5175-5182页

作者： You, Xuemei Hao, Fanchang Ma, Yinghong School of Management Science and Engineering Shandong Normal University Jinan China The Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei China School of Information Shandong University of Political Science and Law Jinan China The Evidence Forensic Laboratory in Universities of Shandong Province Jinan China

Differential Evolution (DE) algorithm is a kind of intelligent algorithm based on natural evolution over the past few decades, which shows better optimization performance on some classical benchmark problems. However, it is easy to fall into local optimum and hard to find the global optimal solution when solving complex multimodal optimization problems. In this paper, we propose a Hybrid-strategybased Differential Evolution (HDE) algorithm. It combines three search strategies, the self-adaptive controlling of parameters, multiple mutation strategy and opposition-based learning. Then we select 11 different types of complex multimodal optimization problems and do experiment with simulated data. The result shows that HDE algorithm gets better performance than other 7 methods. ©, 2015, Journal of Information and Computational Science. All right reserved.

关键词： Optimization

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：