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10th ACM Conference on Embedded Networked Sensor Systems, SenSys 2012

作者： Landsiedel, Olaf Ferrari, Federico Zimmerling, Marco Computer Science and Engineering Chalmers University of Technology Sweden Computer Engineering and Networks Laboratory ETH Zurich Switzerland

ISBN: (纸本)9781450311694

We argue in this paper that CaptureCom closes the control loop in wireless CPS: it provides efficient collection, processing (in our example aggregation), and dissemination within the network, making it suitable for widespread control applications. Our initial evaluation shows that CaptureCom efficiently exploits spacial diversity. It converges within 125 ms at high reliability, leading to low communication delays and high energy efficiency. Motivated by these promising initial results, we are currently investigating the theoretical and experimental foundations of CaptureCom as a novel primitive for wireless CPS. Copyright © 2012 ACM.

关键词： Cyber Physical System

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Silicon electro-optic modulator with high-permittivity gate dielectric layer

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Chinese Optics Letters 2009年第10期7卷 924-925页

作者：朱梦霞周治平郜定山 Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University School of Electrical and Computer Engineering Georgia Institute of Technology

A high-permittivity （high-k） material is applied as the gate dielectric layer in a silicon metal-oxide- semiconductor （MOS） capacitor to form a special electro-optic （EO） modulator. Both induced charge density and modulation efficiency in the proposed modulator are improved due to the special structure design and the application of the high-k material. The device has an ultra-compact dimension of 691 μm in length.

关键词： Electrooptical devices Gate dielectrics Gates (transistor) Modulation Permittivity Semiconducting silicon compounds

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Intermittent Geocast Routing in Urban Vehicular Delay Tolerant networks

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Tsinghua Science and Technology 2016年第6期21卷 630-642页

作者： Zhiyuan Li Panpan Wu the School of Computer Science and Telecommunication Engineering Jiangsu University Zhenjiang 212013 China the Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing 210003 China

Nowadays, both vehicular active safety service and user infotainment service have become two core applications for urban Vehicular Delay Tolerant networks（u VDTNs）. Both core applications require a high data transmission capacity over u VDTNs. In addition, the connection between any two vehicles in u VDTNs is intermittent and opportunistic. Intermittent data dissemination over u VDTNs is a stringent and challenging issue. In this paper,we propose Intermittent Geocast Routing（IGR）. For the first step, IGR has to estimate the active connection time interval via the moving directions and velocities between any two vehicles. Second, the throughput function for u VDTNs is fitted by building a wavelet neural network traffic model. Third, the throughput function within the effective connection time interval is integrated to obtain the forwarding capability estimation of the node. Fourth, a high-efficiency geocast routing algorithm using the node forwarding capability for u VDTNs is designed. Finally, IGR is simulated on the opportunistic Network Environment simulator. Experimental results show that IGR can greatly improve the packet delivery ratio, transmission delay, delay jitter, and packet loss rate compared with the state of the art.

关键词： urban vehicular delay tolerant networks geocast routing node forwarding capability connection time

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Sensitivity and detection limit of dual-waveguide coupled microring resonator biosensors

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Chinese Optics Letters 2009年第7期7卷 598-600页

作者：夏志轩易华祥陈曜周治平 Wuhan National Laboratory for Optoelectronics School of Optoelectronics Science and Engineering Huazhong University of Science and Technology State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University School of Electrical and Computer Engineering Georgia Institute of Technology

We show that a linear relation exists between the device sensitivity and the quality （Q） factor of a dual- waveguide coupled microring resonator optical biosensor when the optimal conditions are satisfied. We also show that the detection limit depends on the loss coefficient and signal-to-nosie ratio （SNR） of the overall system, rather than the circumference of the ring. For a microring resonator sensor whose Q factor is 20000, the detection limit is found to be about 10-7 with 30-dB SNR, which is in good agreement with reported experimental data. These results indicate that loss reduction is the top priority in the design and fabrication of highly sensitive microring resonator optical biosensors.

关键词： Acoustic intensity Optical resonators Signal to noise ratio Signal transduction Waveguides

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Realization of population inversion between 7S_(1/2) and 6P_(3/2) levels of cesium for four-level active optical clock

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Science China(Physics,Mechanics & Astronomy) 2013年第6期56卷 1107-1110页

作者： WANG YanFei WANG DongYing ZHANG TongGang HONG YeLong ZHANG ShengNan TAO ZhiMing XIE XiaoPeng CHEN JingBiao State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum ElectronicsSchool of Electronics Engineering & Computer SciencePeking University

We demonstrate experimentally the population inversion between 7S1/2 and 6P3/2 levels of cesium in thermal cesium cell with a 455.5 nm pumping *** calculate the relative population probabilities at each level theoretically with the density matrix *** a steady state,5.8% atoms are at 7S1/2 level and 2.9% at 6P3/2 level,which builds up the population inversion between the two *** obtain the fluorescence spectra produced in thermal cesium cell in our *** measured relative intensity of each available fluorescence spectral line in the experiment agrees very well with the theoretical *** demonstrated population inversion between 7S1/2 and 6P3/2 levels can be used to construct an active optical clock of four-level system with a wavelength of 1469.9 nm.

关键词： active optical clock four-level system population inversion

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Three-Step Carrier Frequency Offset Estimation Algorithm for Burst-Mode Communications

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电子学报(英文版) 2010年第1期19卷 165-169页

作者： LUO Wu LIU An LIANG Qinglin State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronic Engineering and Computer Science Peking University Beijing 100871 China

A data-aided frequency offset estimation algorithm suited for burst-mode communications is described and analyzed. The proposed algorithm is based on a Pilot symbol assisted modulation (PSAM) frame structure, which consists of regularly spaced pilot symbols and a group of consecutive pilot symbols embedded in. Firstly, an initial estimate based on consecutive pilot symbols is generated for reducing the phase ambiguity. Secondly, based on both spaced and consecutive pilot symbols, fine preliminary estimates are generated to improve estimation accuracy. Lastly, the final estimate is obtained by combining the fine preliminary estimates with the initial. This three-step algorithm is shown to provide high estimation accuracy close to those of FFT-based algorithm at low Signal-to-noise ratio (SNR). In addition, it is suitable for high carrier frequency offset cases.

关键词：频偏估计算法突发模式载波频偏通讯导频符号辅助载波频率偏移 FFT算法 PSAM

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Granular classifier:Building traffic granules for encrypted traffic classification based on granular computing

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Digital Communications and networks 2024年第5期10卷 1428-1438页

作者： Xuyang Jing Jingjing Zhao Zheng Yan Witold Pedrycz Xian Li State Key Laboratory on Integrated Services Networks School of Cyber EngineeringXidian UniversityChina Department of Electrical and Computer Engineering University of AlbertaCanada Institute for Future(IFF) Qingdao UniversityQingdaoChina

Accurate classification of encrypted traffic plays an important role in network ***,current methods confronts several problems:inability to characterize traffic that exhibits great dispersion,inability to classify traffic with multi-level features,and degradation due to limited training traffic *** address these problems,this paper proposes a traffic granularity-based cryptographic traffic classification method,called Granular Classifier(GC).In this paper,a novel Cardinality-based Constrained Fuzzy C-Means(CCFCM)clustering algorithm is proposed to address the problem caused by limited training traffic,considering the ratio of cardinality that must be linked between flows to achieve good traffic ***,an original representation format of traffic is presented based on granular computing,named Traffic Granules(TG),to accurately describe traffic structure by catching the dispersion of different traffic *** granule is a compact set of similar data with a refined boundary by excluding *** on TG,GC is constructed to perform traffic classification based on multi-level *** performance of the GC is evaluated based on real-world encrypted network traffic *** results show that the GC achieves outstanding performance for encrypted traffic classification with limited size of training traffic and keeps accurate classification in dynamic network conditions.

关键词： Encrypted traffic classification Semi-supervised clustering Granular computing Anomaly detection

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Optimization of renewable green base station deployment

Optimization of renewable green base station deployment

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2013 IEEE International Conference on Green Computing and Communications and IEEE Internet of Things and IEEE Cyber, Physical and Social Computing, GreenCom-iThings-CPSCom 2013

作者： Pamuklu, Turgay Ersoy, Cem Department of Computer Engineering Computer Networks Research Laboratory Bogazici University Bebek Istanbul Turkey

ISBN: (纸本)9780769550466

Energy efficient operation of mobile stations has been investigated since almost two decades because of their limited power sources. On the other hand, cellular network base stations obtain their energy from the power grid which was reasonably priced so that power consumption optimization was not needed. However power source prices increases day by day across the board as well as on ICT. Moreover, green energy source awareness of the society increases exponentially and governments start to change their power policies to promote green energy sources. Therefore, significant amount of recent ICT research efforts started focusing on green base station problems. This paper proposes a novel deployment algorithm which deals with both the heterogonous deployment problem using renewable power source base stations and the cell-zooming technique. Results show that power consumption decreases significantly hence reducing carbon emission rates and decreasing the expenditures of the operators significantly while sustaining acceptable performance in the form of spectral efficiency and coverage. © 2013 IEEE.

关键词： Energy efficiency

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Achieving Physical Layer Security Against Location Unknown Eavesdroppers via Friendly Jammer

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IEEE/CAA Journal of Automatica Sinica 2023年第10期10卷 2038-2040页

作者： Heng Zhang Jianwei Sun Xin Wang Chenglong Gong School of Computer Engineering Jiangsu Ocean UniversityLianyungang 222000China School of Electronic Engineering Jiangsu Ocean UniversityLianyungang 222000China Shandong Provincial Key Laboratory of Computer Networks Shandong Computer Science CenterQilu University of TechnologyJinan 250014China

Dear Editor, This letter is concerning friendly jamming unmanned aerial vehicles(UAVs) to assist in the safe communication of UAV base stations. Due to the openness of UAV wireless communication, it is vulnerable to attacks leading to information disclosure or blockage. To address this issue, friendly jamming UAVs can assist UAV base stations and improve the security of wireless communications.

关键词： communication letter base

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Ultra-Sensitive Optical Fiber Spr Biosensor for Precise Prostate Cancer Diagnosis by Label-Free Detection of Mirna-21

SSRN

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SSRN 2025年

作者： Wang, Jiale Deng, Minghua Niu, Kunpeng Wang, Chuanquan Wang, Ning Li, Jinhua Xia, Binyun Ding, Liyun Yang, Huan Chen, Xiaohan Zhu, Jiayi National Engineering Research Center of Fiber Optic Sensing Technology and Networks Wuhan University of Technology Wuhan430070 China School of Computer and Information Engineering Hubei Normal University Huangshi China Hubei Optical Fundamental Research Center Wuhan China Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry Key Laboratory for the Green Preparation and Application of Functional Materials Ministry of Education Hubei Key Laboratory of Polymer Materials School of Materials Science and Engineering Hubei University Wuhan430062 China School of Physical Science and Technology Lanzhou University Lanzhou730000 China Department of Urology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan430030 China

Efficient and rapid identification of miRNA-21 may be conducive to the early diagnosis of prostate cancer. In this work, a label-free and highly sensitive optical fiber Surface Plasmon Resonance (SPR) biosensor was developed for detecting the miRNA-21, which was fabricated simply by coating a layer of Au film and AuNPs onto a multi-mode-single-mode-multi-mode (MSM) optical fiber, and then biofunctionalized with ssDNA enabling the quantification of miRNA-21. The working principle involves initiating the change of the effective refractive index (RI) around the optical fiber's surface, which was caused by nucleic acid hybridization between the ssDNA and the miRNA-21. As a result, the interaction would result in a noticeable shift of the SPR wavelengths in the transmission spectra. In the experiment, a substantial enhancement was exhibited in the RI sensitivity of the optical fiber sensor due to the surface plasmon resonance (SPR) coupling effect of AuNPs and the Au film, measuring approximately 3021.48 nm/RIU. Excitingly, the biosensors, which have a simple composition, were experimentally verified to have an ultra-low limit of detection (LOD) of 10-20 M, significantly lower than current detection methods. And trace miRNA-21 was enabled for detection without RNA amplification. The SPR sensors were also experimentally proved with excellent linearity, specificity and stability. When employed to detect the serum samples, the results indicated that the proposed sensors could brilliantly distinguish clinical patients with and without prostate cancer. Compared to the commonly used PSA quantification in clinical practice, the method developed in this work has higher detection accuracy. The proposed sensing platform processes the merits of simple configuration as well as low cost and may be applied for the precise diagnosis of prostate cancer. © 2025, The Authors. All rights reserved.

关键词： Surface plasmon resonance

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