A5101492756- Mobile Ad Hoc Networks
- Cryptography and Data Security
- Energy Efficient Wireless Sensor Networks
- Photonic and Optical Devices
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Privacy-Preserving Technologies in Data
- Internet Traffic Analysis and Secure E-voting
- Optical Wireless Communication Technologies
- Orbital Angular Momentum in Optics
- Metamaterials and Metasurfaces Applications
- Cooperative Communication and Network Coding
- Semiconductor Lasers and Optical Devices
- Wireless Networks and Protocols
- Neural Networks and Reservoir Computing
- Silicon Nanostructures and Photoluminescence
- Advanced Fiber Optic Sensors
- Energy Harvesting in Wireless Networks
- Security in Wireless Sensor Networks
- Advanced Sensor and Energy Harvesting Materials
- Advanced Optical Imaging Technologies
- Advanced Thermoelectric Materials and Devices
- Advanced Wireless Network Optimization
- Advanced Authentication Protocols Security
- Advanced Malware Detection Techniques
Nanjing University of Chinese Medicine
2025
Guangdong University of Technology
2020
Institute for Infocomm Research
2005-2018
University of Toronto
2003-2018
Northwestern Polytechnical University
2010-2017
Fiberhome Technology Group (China)
2015
Hunan University of Traditional Chinese Medicine
2015
Fudan University
2013-2014
Southwest Petroleum University
2014
Agency for Science, Technology and Research
2007-2009
Beam-steering devices, which are at the heart of optical wireless-broadcasting communication links, play an important role in data allocation and exchange. An ideal beam-steering device features large steering angles, arbitrary channel numbers, reconfigurability, ultracompactness. However, these criteria have been achieved only partially with conventional devices based on waveguides, micro-electricalmechanical systems, spatial light modulators, gratings, will substantially limit application...
Neighbor discovery is a fundamental service for initialization and managing network dynamics in wireless sensor networks mobile sensing applications. In this paper, we present novel design principle named Talk More Listen Less (TMLL) to reduce idle-listening neighbor protocols by learning the fact that more beacons lead fewer wakeups. We propose an extended model analyzing wakeup schedules which are not necessarily placed slots. Furthermore, first consider channel occupancy rate introducing...
Paper-based devices have aroused researchers' enormous interest due to the increasing need for disposable flexible optoelectronic devices. Here, we used a straightforward painting method integrate semiconducting materials on an A4 paper substrate create high-performance photodetectors. A solvent-free 2D SnSe film painted allowed electrons separate from holes more effectively, thereby reducing level of recombination between and electrons. The paper-based photodetectors that prepared...
Pricing is considered as a means to stimulate cooperation in ad hoc networks: users can charge other price for relaying their data packets. Assuming that set prices maximize own net benefit, we propose an iterative and rate adaption algorithm. We show this algorithm converges socially optimal bandwidth allocation. use numerical case study illustrate our results.
Location-based services (LBS) bring convenience to people’s lives but are also accompanied with privacy leakages. To protect the of LBS users, many location protection algorithms were proposed. However, these often have difficulty maintain a balance between service quality and user privacy. In this paper, we first overview shortcomings existing two architectures technologies, then propose method based on blockchain. Our satisfies principle k-anonymity does not need help trusted third-party...
We consider a market-based approach to stimulate cooperation in ad hoc networks where nodes charge price for relaying data packets. Assuming that set prices maximize their own net benefit, we characterize the equilibria of resulting market. In addition, propose an iterative algorithm adapt and rate allocation, study its convergence behavior. use numerical case illustrate our results.
A compact external cavity tunable laser based on a silicon hybrid micro-ring resonator is demonstrated. theoretical model also employed for design and analysis of the wavelength tuning performance device. In this model, gain section device simulated by conventional multimode rate equation whereas all rest passive sections are modeled frequency domain method. Experimental results have shown that output power can reach 29 mW, with linewidth less than 150 kHz. The range more 17 nm in C-band 60...
When a sensor node roams within very large and distributed wireless network, which consists of numerous nodes, its routing path neighborhood keep changing. In order to provide high level security in this environment, the moving needs be authenticated new neighboring nodes key established for secure communication. The paper proposes an efficient scalable protocol establish update authentication dynamic network environment. guarantees that two share at least one with probability 1 (100%) less...
We demonstrate the multiplexing/demultiplexing of pol-muxed 22 orbital angular momentum (OAM) modes. Using 17.9-Gbit/s OFDM/OQAM 64-QAM signals over OAM modes (44 channels in total), we achieve an ultra-high spectral efficiency 230 bit/s/Hz.
In this paper, we present an asynchronous energy-efficient MAC protocol called RW-MAC for wireless sensor networks. is a receiver-initiated which significantly reduces energy consumption by precisely predicting the re ceiver's wakeup time while still achieves high concurrent performance. To minimize collision, algorithm to stagger of each node in same collision do main. also tries optimize send sequence maximize throughput. We have implemented on TinyOS and evaluated its performance...
Sensor networks tend to support different traffic patterns since more and emerging applications have diverse needs. We present MGRP, a Multi-Gradient Routing Protocol for wireless sensor networks, which is fully distributed efficiently supports end-to-end, one-to-many many-to-one by effectively construct maintain gradient vector each node. further combine neighbor link estimation with routing information reduce packet exchange on network dynamics node failures. implemented MGRP TinyOS...
In recent years, the concept of metasurface has brought impact on way manipulating light using conventional wavefront shaping components by both reducing device size and increasing design flexibility. this work, a spatial mode converter based dielectric metasurfaces for spin angular momentum is proposed. The structure parameters nanobricks are designed phase distribution derivation geometric propagation phase. It shown that can transfer fundamental including circular or elliptical...
Beam-steered infrared (IR) light communication has gained tremendous attention as one of the solutions congested wireless traffic. High performance active beam-steering devices play a crucial role in data allocation and exchange. Conventional such spatial modulator (SLM) micro-electrical mechanical system (MEMS) mirror current emerging nonmechanical metasurface-based are challenging to realize large tunable steering angle beyond several degrees, which significantly hinders application...
A 24-Gb/s PAM-4 signal is generated using a driverless silicon microring modulator, bit error rate of 3.8e-4 achieved after transmission over 150km SSMF, proving that the low cost and power consumption modulators may be candidate in high-capacity modules with advanced modulation.
This paper studies mobile devices mediated electronic voting system based on the distributed Pailler's encryptions; We apply standard cut-of-the-choose technique to avoid computational zero-knowledge proofs and show that proposed scheme is efficient yet somewhat provably secure in simulation-based paradigm.
Unlike most of the spams targeting for advertisements only, phishing try to cheat email recipients with bogus sender addresses so as obtain confidential information recipients. This paper presents a Sender Authentication Protocol (SAP) which aims filter out this kind crafty spoofing emails. To end, SAP challenges claimed-sender historical emails verify authenticity sender. As it does not change protocol, and is able be embedded into off-the-shelf software such Microsoft Outlook <sup...
The Fourier transform between the time and frequency signals of light enables highly efficient band usage in optical communications. Analogously, wavefield wavevector distributions spatial diffraction is useful to understand bandwidth considered simulations. In this work, we thoroughly investigate numerical techniques for controlling design computer-generated holography. experiments reveal effects control on both accuracy improvement equations suppression higher hologram orders. A general...
Zinc oxide nanoneedles array were synthesized on Si substrate by catalyst-free chemical vapor deposition technique.Scanning electron microscopic images displayed that the ZnO with average diameter of 100 nm aligned well substrate.TEM showed there some steps top nanoneedles.Only (002) diffraction peak can be found in XRD patterns samples, indicating as-grown are highly crystalline nature and grow along [0001] direction.The growth mechanism is consistent step kinetics bizarre surface growing...
ZnO thin films were grown on Si(1 1 1) substrates by the pulsed laser deposition (PLD) technique, where surface was nitrogenized via nitrogen plasma prior to growth. N–Si bonds formed due nitrogenation. In general, an imbalance in interface charge is one of serious problems associated with growth a polar semiconductor (ZnO) nonpolar (Si). However, at play important role initial stage balance between and 1). terms x-ray photoelectron spectroscopy results, layer stable bonding configuration...