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IEEE CIRCUITS AND SYSTEMS MAGAZINE 2014年第1期14卷 4-+页

作者： Tse, Chi K. School of Electronics and Information Engineering Ministry of Education Key Laboratory for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an China Department of Electrical and Computer Engineering University of Delaware Newark DE USA

The articles in this special issue focus on recent trends in circuits and systems engineering education, with particular emphasis on the principles of multiport communication theory; curriculum development; and biomet... 详细信息

关键词： Special issues and sections Circuits and systems Electrical engineering education Education courses Educational institutions Biometrics Communication theory

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Automatic Control System of Water and Fertilizer Based on Fuzzy Control Algorithm and Simulation 2

Automatic Control System of Water and Fertilizer Based on Fu...

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2017 IEEE 2nd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC 2017)

作者： Yan Jiang Jingbo Zhao Jie Duan Huijuan Hao Maoli Wang College of Automation Engineering Qingdao University of Technology Shandong Provincial Key Laboratory of Computer Networks Shandong Computer Science Center(National Super computer Center in Jinan)

ISBN: (纸本)9781509064151;9781509064144

In order to improve the precision of mixing fertilizer, this paper has improved its structure on the basis of pulse width modulation of the VENTURI variable fertilization device, and realizes the concentration of liquid fertilizer by p H and EC sensor to make it a closed-loop control Mixed fertilizer device. The device adopts the control strategy of the thickness level 2 adjustment. First, the corresponding duty relation is called according to the measured inlet pressure, and the duty ratio of the solenoid valve PWM control is automatically adjusted. And the fuzzy control algorithm is used to further fine-tune the duty cycle of PWM so that the concentration of the mixture is as close as possible to the target concentration. Finally, the fuzzy control and PID control of the flow control valve are simulated. The results show that fuzzy control is better than PID control in response speed and overshoot, and both steady-state errors are within ± 3.0%.

关键词： Fertilizer Venturi Tube Automatic control Fuzzy control Simulation

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Compact triplexer in two-dimensional hexagonal lattice photonic crystals

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Chinese Optics Letters 2011年第4期9卷 87-90页

作者：任宏亮马建平温浩覃亚丽吴哲夫胡卫生姜淳金耀辉 College of Information Engineering Zhejiang University of Technology College of Computer Science and Technology Zhejiang University of Technology State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

We design a compact triplexer based on two-dimensional （2D） hexagonal lattice photonic crystals （PCs）. A folded directional coupler （FDC） is introduced in the triplexer beside the point-defect micro-cavities and line-defect waveguides. Because of the reflection feedback of the FDC, high channel drop efficiency can be realized and a compact size with the order of micrometers can be maintained. The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method. The footprint of the triplexer is about 12 9 μm, and its extinction ratios are less than -20 dB for 1310 nm, approximately -20 dB for 1490 nm, and under -40 dB for 1550 nm, making it a potentially essential device in future fiber-to-the-home networks.

关键词： Crystal lattices Defects Fiber optic networks Finite difference time domain method Multiplexing equipment Optical waveguides Personal communication systems Time domain analysis Two dimensional

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Reinforced Multi-teacher Knowledge Distillation for Efficient General Image Forgery Detection and Localization

arXiv

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arXiv 2025年

作者： Yu, Zeqin Ni, Jiangqun Zhang, Jian Deng, Haoyi Lin, Yuzhen School of Computer Science and Engineering Sun Yat-sen University China School of Cyber Science and Technology Sun Yat-sen University China Department of New Networks Peng Cheng Laboratory China Guangdong Key Laboratory of Intelligent Information Processing Shenzhen University China

Image forgery detection and localization (IFDL) is of vital importance as forged images can spread misinformation that poses potential threats to our daily lives. However, previous methods still struggled to effectively handle forged images processed with diverse forgery operations in real-world scenarios. In this paper, we propose a novel Reinforced Multi-teacher Knowledge Distillation (Re-MTKD) framework for the IFDL task, structured around an encoder-decoder ConvNeXt-UperNet along with Edge-Aware Module, named Cue-Net. First, three Cue-Net models are separately trained for the three main types of image forgeries, i.e., copy-move, splicing, and inpainting, which then serve as the multi-teacher models to train the target student model with Cue-Net through self-knowledge distillation. A Reinforced Dynamic Teacher Selection (Re-DTS) strategy is developed to dynamically assign weights to the involved teacher models, which facilitates specific knowledge transfer and enables the student model to effectively learn both the common and specific natures of diverse tampering traces. Extensive experiments demonstrate that, compared with other state-of-the-art methods, the proposed method achieves superior performance on several recently emerged datasets comprised of various kinds of image forgeries. © 2025, CC BY-NC-SA.

关键词： Image coding

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Light-weight network health monitoring

Light-weight network health monitoring

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11th ACM/IEEE Conference on Information Processing in Sensing networks, IPSN'12

作者： Chiang, Yi-Hsuan Keller, Matthias Lim, Roman Huang, Polly Jan, Beutel Graduate Institute of Communication Engineering National Taiwan University Taiwan Computer Engineering and Networks Laboratory ETH Zurich Switzerland

ISBN: (纸本)9781450312271

As the application of WSNs for long-term monitoring purposes becomes real, the issue of WSN system health monitoring grows increasingly important. Manually understanding the root causes of an observed behavior is time-consuming and difficult, often knowledge of prior behavior is necessary for understanding the potential risk on the long-term system performance. The challenges lie in the balance between the amount of system data collected and the level of detail in which state can be inferred from this data. In this paper, we propose a lightweight runtime logging and corresponding network state inference mechanism that enables scalable WSN health monitoring. Concretely, we propose that nodes only report their internal state on the occurrence of important events. Having a very low computational complexity and message overhead within the sensor network, reported events are analyzed at a less constrained network sink. © 2012 ACM.

关键词： Wireless sensor networks

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Accurate pitch marking for prosodic modification of speech segments

Accurate pitch marking for prosodic modification of speech s...

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作者： Ewender, Thomas Pfister, Beat Speech Processing Group Computer Engineering and Networks Laboratory ETH Zurich Switzerland

This paper describes a new approach to pitch marking. Unlike other approaches that use the same combination of features for the whole signal, we take into account the signal properties and apply different features according to some heuristic. Basically we use a special type of energy contour for pitch marking. Where the energy information turns out to be not suitable as an indicator we resort to the fundamental wave computed from a contiguous F 0 contour in combination with detailed voicing information. Our experiments demonstrate that the proposed pitch marking algorithm clearly improves the quality of synthe-sised speech generated by a concatenative text-to-speech system that uses TD-PSOLA for prosodic modifications. © 2010 ISCA.

关键词： Speech synthesis

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A Novel Forwarding Method for Full-Duplex Two-Way Relay networks

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China Communications 2017年第4期14卷 65-72页

作者： Shuangshuang Han Xiang Cheng Liuqing Yang The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of SciencesBeijing China and Qingdao Academy of Intelligent Industries The State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Department of Electrical and Computer Engineering Colorado State University

An estimate-and-forward(EF) scheme for single-input single-output(SISO) and multiple-input multiple-output(MIMO) full-duplex two-way relay networks is proposed and analyzed. The relay estimates the received signal from two terminal nodes by a minimum mean squared error(MMSE) estimation and forwards a scaled version of the MMSE estimate to the destination. The proposed EF outperforms conventional amplify-and-forward(AF) and decode-and-forward(DF) across all signal-to-noise ratio(SNR) region. Because its computational complexity is high for relays with a large number of antennas(large MIMO) and/or high order constellations, an approximate EF scheme, called list EF, are thus proposed to reduce the computational complexity. The proposed list EF computes a candidate list for the MMSE estimate by using a sphere decoder, and it approaches the performance of the exact EF relay at a negligible performance loss. The proposed forwarding approach also could be used to other relay networks, such as half-duplex, one-way or massive MIMO relay networks.

关键词： estimate-and-forward full-duplex two-way relay wireless communications

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Performance analysis of elastic optical networks (EONs) switches under unicast traffic

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Iran Journal of computer Science 2019年第2期2卷 125-129页

作者： Abkenar, Forough Shirin Rahbar, Akbar Ghaffarpour Shamsi, Mousa Computer Networks Research Laboratory Electrical Engineering Technologies Research Center Sahand University of Technology Tabriz Iran

Bandwidth variable-wavelength cross connect switches (BV-WXCs) play an important role in the routing and spectrum assignment (RSA) problem in elastic optical networks (EONs). These switches, whose structure has been derived from micro electro mechanical systems technology, aim to switch the incoming traffic flexibly such that the existing resources are not wasted and more requests can be served. There exist different quality of service parameters which have to be provided in EON, such as delay, loss, jitter, and so forth. Among these parameters, blocking probability (BP) has been always taken into account in EON and several researches have been done to address it. The main objective of most RSA algorithms is to alleviate BP of requests through efficient usage of resources, such as frequency slots and BV-WXC ports. To show the importance of BV-WXC in routing and resource assignment in EON, its performance is analyzed in this paper. The BP of the BV-WXC is evaluated by means of an analytical model under unicast traffic and the obtained results are compared to the blocking probability results acquired from simulations for different number of input/output ports and available resources. The obtained results show that the analytical model has a good agreement with the simulation results. © Springer Nature Switzerland AG 2019.

关键词： Bandwidth variable-wavelength cross connect switch (BV-WXC) Blocking probability (BP) Elastic optical networks (EONs) Unicast traffic

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Deterministic and Stochastic Simulators for Non-Isotropic V2V-MIMO Wideband Channels

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China Communications 2018年第7期15卷 18-29页

作者： Yiran Li Xiang Cheng Nan Zhang State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Wireless Algorithm Department Product Research and Development System ZTE Corporation

In this paper, we consider a novel two-dimensional(2D) geometry-based stochastic model(GBSM) for multiple-input multiple-output(MIMO) vehicle-to-vehicle(V2V) wideband fading channels. The proposed model employs the combination of a two-ring model and a multiple confocal ellipses model, where the signal is sum of the line-of-sight(Lo S) component, single-bounced(SB) rays, and double-bounced(DB) rays. Based on the reference model, we derive some expressions of channel statistical properties, including space-time correlation function(STCF), Doppler spectral power density(DPSD), envelope level crossing rate(LCR) and average fade duration(AFD). In addition, corresponding deterministic and stochastic simulation models are developed based on the reference model. Moreover, we compare the statistical properties of the reference model and the two simulation models in different scenarios and investigate the impact of different vehicular traffic densities(VTDs) on the channel statistical properties of the proposed model. Finally, the great agreement between simulation models and the reference model demonstrates not only the utility of simulation models, but also the correctness of theoretical derivations and simulations.

关键词： vehicle-to-vehicle wideband channels simulation model statistical properties

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Performance evaluation of the deadline credit scheduling algorithm for soft-real-time applications in distributed video-on-demand systems 2nd

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2nd International IFIP-TC6 Networking Conference, NETWORKING 2002

作者： Alexandraki, Adamantia Paterakis, Michael Technical University of Crete Department of Electronics and Computer Engineering Laboratory of Information and Computer Networks ChaniaGR-731-00 Greece

ISBN: (纸本)3540437096

In this work we investigate a promising scheduling algorithm referred to as the Deadline Credit (DC) algorithm, which exploits the available bandwidth and buffer space in communication networks to serve a diverse class of prerecorded video applications. We provide simulation results when the DC algorithm is applied to a hierarchical architecture distributed VoD network, which fits the existing tree topology used in today’s cable TV systems. The issues investigated via the simulations are: the system utilization, the influence of the buffer space on the delivered QoS, and the fairness of the scheduling mechanism. We examine cases with homogenous and diverse video streams. We also contribute a modification to the DC algorithm so that in cases when the video applications have different displaying periods, the video streams obtain a fair share of the network’s resources. Finally, we validate our results by simulating actual videos encoded in MPEG-4 and H.263 formats. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Scheduling algorithms

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