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IEEE International Conference on communications (ICC)

作者： M.A. Haleem R. Chandramouli Multimedia System Networking and Communications (MSyNC) Laboratory Department of Electrical and Computer Engineering Stevens Institute of Technology Hoboken NJ USA

A joint channel adaptive rate control and randomized scheduling algorithm based on learning automata (LA) K. S. Narendra et al., (1989)is presented. The scheduling is performed at the medium access control (MAC) layer whereas the rate selection takes place at the physical/link (PHY/LINK) layer. The two components residing in the two layers exchange minimal amount of information and adaptively achieve the best throughput and desired quality of service (QoS) in terms of average transmission rates in the prevailing channel conditions. Scheduling is carried out by a LA of continuous reward penalty variate, and a discrete pursuit reward inaction (DPRI) type B. J. Oommen et al., (1990) is used for adaptive rate selection. While simple to implement, this technique requires no explicit channel estimation phase. The only feedback required are the single bit ACK signal indicating the correct reception of packets. As shown in the convergence theorems, the algorithm achieves optimal performance in "stationary'" channels. With slowly varying channels, the MCS selection algorithm sees a "quasistationary" channel and adaptively converges to the optimality. Simulation results are provided for parameters as per to HSDPA standard.

关键词： Programmable control Adaptive control Control systems Multimedia systems Automatic control Quality of service Scheduling algorithm Learning automata Media Access Protocol Physical layer

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Evaluating wall installation methods for cylindrical solar cells in urban areas by luminous flux simulation 13

Evaluating wall installation methods for cylindrical solar c...

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13th IEEE Power and Energy Society: Innovative Smart Grid Technologies - Asia, ISGT Asia 2024

作者： Tamura, Fumiki Yokogawa, Shinji Hayase, Shuzi Nakamura, Masaki Hirami, Tomoyuki Hirotani, Daisuke Sono, Yuya Takenoya, Toshihiro Nomura, Daishiro Nomura, Takatoshi Hayashi, Masahiro Honma, Kento The University of Electro-Communications Graduate School of Informatics and Engineering Department of Informatics Tokyo Japan The University of Electro-Communications Info-Power Energy System Research Center Tokyo Japan Ushio Inc Marketing Division Climate Solution Department Japan Marketing Division Ushio Inc Global Warming Solution Group Climate Solution Department Japan Fujico CO. Ltd Technology Development Center Japan Ckd Corporation New Business Development Office Japan The University of Electro-Communications Informatics and Computer Engineering Tokyo Japan

ISBN: (纸本)9798350373929

In urban areas of Japan, such as Tokyo, overcrowding in condominiums and office buildings leaves limited flat land for installing solar panels, resulting in inadequate installation of renewable energy. To advance photovoltaic power generation and support Japan's goal of achieving carbon neutrality by 2050, we are exploring the use of cylindrical solar cells in these dense urban settings. Cylindrical solar cells are ideal for metropolitan installations due to their lightweight design and wind resistance. However, it is crucial to consider how installation configurations influence electricity production, especially the need to minimize shadowing from nearby buildings and other urban elements. This study utilized lighting simulation software to model the light flux based on actual installation conditions of cylindrical solar cells to identify optimal placement strategies. Additionally, this configuration was compared with traditional flat-plate solar cells under similar conditions. Findings indicate that cylindrical solar cells offer flexible installation options. Notably, employing a horizontal grid layout for cylindrical cells addresses the challenges associated with wall-mounted flat-plate cells, which suffer reduced luminous flux at higher solar altitudes. These results demonstrate that cylindrical solar cells can effectively overcome the challenges of photovoltaic installation in densely populated urban areas. © 2024 IEEE.

关键词： Apartment houses

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Color Effect on the Face Recognition with Spatial Resolution Constraints

Color Effect on the Face Recognition with Spatial Resolution...

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IEEE International Symposium on Multimedia

作者： Jae Young Choi Seungji Yang Yong Man Ro Konstantinos N. Plataniotis Image and Video System Laboratory Information and Communications University South Korea Department of Electrical and Computer Engineering University of Toronto Canada

In the practical face recognition (FR) applications, low-resolution faces (20 times 20 pixels or less) are commonly encountered and negatively impact on reliable performance. To overcome low-resolution face problem, we show that face color can significantly improve the performance compared to intensity-based features. The contribution of this paper is twofold. First, a new metric called dasiavariation ratio gainpsila (VRG) is proposed to theoretically prove the significance of color effect on low-resolution faces. Second, we conduct extensive performance comparison studies. In particular, 3,192 color facial images corresponding to 341 subjects, collected from three standard CMU PIE, FERET, and XM2VTSDB face databases, were used to perform comparative studies of color effect on various face resolutions. Experimental results verified that face color feature improves the degraded recognition rate due to low-resolution faces by at least an order of magnitude over intensity-based features.

关键词： Face recognition Spatial resolution Face detection Image color analysis Gray-scale Reluctance generators Robustness Degradation Principal component analysis Linear discriminant analysis

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Neural approximators for nonlinear sliding-window state observers

Neural approximators for nonlinear sliding-window state obse...

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IEEE Conference on Decision and Control

作者： A. Alessandri M. Maggiore T. Parisini R. Zoppoli Department of Communications Computer and System Sciences DIST-University of Genoa Genoa Italy Department of Electrical Electronic and Computer Engineering DEEI-Università di Trieste Trieste Italy

State estimation on the basis of noisy measures is discussed, and a convergence condition for the state estimate is given. Neural approximation of the nonlinear observer is then considered, and the method is briefly c... 详细信息

关键词： State estimation Noise measurement Observability Observers Additive noise Nonlinear dynamical systems Nonlinear control systems Control systems Electric variables measurement Length measurement

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Discussion on a new paradigm of endogenous security towards 6G networks

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Frontiers of Information Technology & Electronic engineering 2022年第10期23卷 1421-1450页

作者： Xinsheng JI Jiangxing WU Liang JIN Kaizhi HUANG Yajun CHEN Xiaoli SUN Wei YOU Shumin HUO Jing YANG Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China National Digital Switching System Engineering&Technological R&D Center Zhengzhou 450002China Purple Mountain Laboratories:Networking Communications and SecurityNanjing 211111China

The sixth-generation mobile communication(6G)networks will face more complex endogenous security problems,and it is urgent to propose new universal security theories and establish new practice norms to deal with theªunknown unknownºsecurity threats in *** paper first expounds the new paradigm of cyberspace endogenous security and introduces the vision of 6G cyberspace ***,it analyzes the security problems faced by the 6G core network,wireless access network,and emerging associated technologies in detail,as well as the corresponding security technology development status and the integrated development of endogenous security and traditional ***,this paper describes the relevant security theories and technical concepts under the guidance of the new paradigm of endogenous security.

关键词： 6G security New paradigm of endogenous security Core network Wireless access network

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Image inpainting by minimum energy restoration with edge-prioritized filling order

Image inpainting by minimum energy restoration with edge-pri...

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International Conference of Information and Communication Technology for Embedded systems (IC-ICTES)

作者： Hiromichi Murofushi Izumi Ito Akinori Nishihara Department of Communications and Computer Engineering Tokyo Institute of Technology Tokyo Japan Department of Human System Science Tokyo Institute of Technology Tokyo Japan

We propose a texture synthesis image inpainting method that minimizes energy function with the filling order which facilitates propagation of edge from the data region to the target region. As a result, the proposed method provides plausible restoration while propagating information of edge for the target region. Experimental results show the validity of the proposed method.

关键词： Image restoration Filling Image edge detection Solids Digital images Embedded systems

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Exploiting machine learning for intelligent room lighting applications

Exploiting machine learning for intelligent room lighting ap...

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International IEEE Conference on Intelligent systems, IS

作者： Aravind Kota Gopalakrishna Tanir Özçelebi Antonio Liotta Johan J. Lukkien Department of Mathematics and Computer Science System Architecture and Networking Netherlands Electro-Optical Communications Department of Electrical Engineering Eindhovan University of Technology Netherlands

Research has shown that environment lighting influences the behavior of the employees in an office setting highly, making lighting configuration in an office space crucial. A breakout area may be used by the employees for various activities that need to be supported by different lighting conditions, e.g. informal meetings or personal retreat. The desired lighting conditions depend on user preferences and other contextual data observable in the environment. In this paper, we introduce a new method for building prediction models to provide intelligent lighting in our pilot breakout area. Based on a set of pre-defined features that are expected to have influence on the users' choice in selecting a desired lighting environment, we introduce a probabilistic model for generating synthetic data. We also discuss and compare the performances of various rule-based classification models on the synthetic data and find `DecisionTable' to be the most suitable model for our pilot implementation. We study the influence of the training set size (number of samples) on various classification models and the influences of individual features through simulations. We present empirical results based on the synthetic dataset and a roadmap for future research.

关键词： Lighting Data models Prediction algorithms Accuracy Training Predictive models Classification algorithms

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A high-efficiency reconfigurable digital signal processor for multimedia computing

A high-efficiency reconfigurable digital signal processor fo...

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Proceedings of the 2003 IEEE International Symposium on Circuits and systems

作者： Chen, Li-Hsun Chen, Oscal T.-C. Ma, Ruey-Liang Signal and Media Laboratories Department of Electrical Engineering National Chung Cheng University Chia-Yi 621 Taiwan Computer System Development Dept. Comp./Communications Research Labs. Indust. Technol. Research Institute Hsinchu 310 Taiwan

In this work, a high-efficiency reconfigurable digital signal processor (DSP) that consists of two arithmetic logic units and a reconfigurable computation unit is designed. The design methodology for the reconfigurable computation unit is explored based on the intermediate grain framework. The proposed reconfigurable computation unit includes 8×8 array processing elements and interconnection paths where the processing element is based on two 8-bit ripple adders and simple logic gates. This reconfigurable computation unit can be configured to perform special operations such as two 16×16-bit multiplication, sixteen 32-bit addition/subtraction, one 16-bit dot product and sixteen 8-bit absolute that utilize these 64 processing elements in different connection topologies to increase their usage rates. In the benchmark analyses, the 8×8-pixel motion estimation and 8×8-pixel discrete cosine transform are realized in the proposed reconfigurable DSP, TI TMS320C64 and MorphoSys. Additionally, the comparison of computation performances and hardware costs is performed to show that the proposed reconfigurable DSP is able to achieve a higher computation performance at a low hardware cost. Therefore, the reconfigurable DSP proposed herein can achieve high-efficiency computing for various multimedia applications.

关键词： Digital signal processing

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AN adaptive DSP processor for high-efficiency computing MPEG-4 video encoder

AN adaptive DSP processor for high-efficiency computing MPEG...

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2004 IEEE International Symposium on Circuits and systems - Proceedings

作者： Chen, Li-Hsun Chen, Oscal T.-C. Wang, Teng-Yi Wang, Chi-Lung Signal and Media Laboratories Department of Electrical Engineering National Chung Cheng University Chia-Yi 621 Taiwan Computer System Development Dept. Comp./Communications Research Labs. Indust. Technol. Research Institute Hsinchu 310 Taiwan

An adaptive Digital Signal Processor (DSP) is proposed to realize the MPEG-4 video encoder at a high ratio of computation power versus hardware cost. First, software analyses are performed on the MPEG-4 video encoder, looking at the function and instruction levels. Analytical results from the function-level analysis show that the motion estimation inside the MPEG-4 video encoder has high computational complexity. As for the instruction-level analysis on the MPEG-4 video encoder without motion estimation, results reveal that the DSP equipped with 5 Arithmetic Logic Units (ALUs), 1 multiplier and 2 Load/Store units has the highest computation performance than the other architectures with 8 functional units. Furthermore, the design of the adaptive mechanism could be incorporated in the said functional units. The suggestion would be to group 4 ALUs and a multiplier into a special functional unit, to process exclusively motion estimation. With the fact that a multiplier can be constructed by using multiple adders, the adaptable structure is also designed so that the numbers of adders and multipliers required can be dynamically changed to increase parallelism capability of local instructions, especially in discrete cosine transform and inverse discrete cosine transform. In comparing to the conventional DSPs, the proposed adaptive DSP shows the best ratio of computation power over hardware cost to realize the MPEG-4 video encoder.

关键词： Digital signal processing

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Quantum noise of dark pulse microcombs

Quantum noise of dark pulse microcombs

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CLEO: QELS_Fundamental Science, QELS 2022

作者： Lao, Chenghao Jin, Xing Chang, Lin Xie, Weiqiang Shu, Haowen Wang, Xingjun Bowers, John E. Yang, Qi-Fan State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Frontiers Science Center for Nano-Optoelectronics School of Physics Peking University Beijing100871 China Department of Electrical and Computer Engineering University of California Santa BarbaraCA93106 United States State Key Laboratory of Advanced Optical Communications System and Networks Department of Electronics School of Electronics Engineering and Computer Science Peking University Beijing100871 China

We investigate the fundamental timing jitter of dark pulse microcombs generated in an AlGaAs microresonator, where the quantum-limited frequency noise of the 91-GHz repetition rate is measured to be 0.5 Hz2/Hz. ©... 详细信息

ISBN: (纸本)9781557528209

关键词： Aluminum gallium arsenide

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