A5038913059- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Materials and Mechanics
- Traffic Prediction and Management Techniques
- Liquid Crystal Research Advancements
- Advanced Sensor and Energy Harvesting Materials
- Surface Roughness and Optical Measurements
- Air Traffic Management and Optimization
- Photochromic and Fluorescence Chemistry
- Color Science and Applications
- Optical Wireless Communication Technologies
- Optical Polarization and Ellipsometry
- Air Quality Monitoring and Forecasting
- Embedded Systems and FPGA Design
- PAPR reduction in OFDM
- Time Series Analysis and Forecasting
- Neural Networks and Reservoir Computing
- Advanced Algorithms and Applications
- Water Quality Monitoring and Analysis
- Peer-to-Peer Network Technologies
- Diatoms and Algae Research
- Silicone and Siloxane Chemistry
Nanjing University of Information Science and Technology
2020-2024
Southwest University of Science and Technology
2015-2023
Institute of Optics and Electronics, Chinese Academy of Sciences
2020-2022
Nanjing University of Aeronautics and Astronautics
2020-2021
Peking University
2015
Civil Aviation University of China
2015
BOE Technology Group (China)
2013-2014
Chongqing Normal University
2013
Sheng Jing Hospital
2010
China Mobile (China)
2009
Bilayer photomechanical films are fabricated by depositing one layer of molecular azobenzene chromophores onto flexible low-density polyethylene substrates. The photoinduced bending and unbending behavior five derivatives including azobenzene, 4-hydroxy-azobenzene, 4-((4-hydroxyphenyl)diazenyl)bezoitrile, 4-((4-methoxyph-enyl)diazenyl)phenol, 4-(phenyldiazenyl)phenol is systematically studied considering the incident light intensity thickness coated chromophore layers. Precise control...
An ultra-short high-temperature fiber-optic sensor based on a silicon-microcap created by single-mode fiber (SMF) and simple fusion splicing technology is proposed experimentally demonstrated. A section of the SMF with at one end connected to “ peanut ” structure build microcap-based optical improved Michelson interferometer (MI). The optimal discharge parameters microcap length has been investigated achieve best extinction ratio 6.61 dB. size this MI 560 µm about 18 times shorter compared...
Abstract Electrodriven bilayer actuator is designed and fabricated by spin‐coating a reduced graphene oxide solution onto polymer substrate. The bonded interface properties, electrical thermal conductivities are characterized through scanning electron microscopy X‐ray diffraction. exhibits fast large bending response when direct current voltage applied to the layer. Whereas it oscillation an alternating actuator. effects of layer structure electro‐operation methods on motions studied. Two...
In this Letter, a novel five-dimensional (5D) data-iteration-based encryption model is proposed at physical layer for multi-wavelength optical frequency division multiplexing passive network (OFDM-PON) by using hyperchaotic system. The scheme can generate five chaotic sequences time. sensitivity of 10-18 be achieved, along with key space 1095. addition, we use channel to transmit the information, and unit freely choose wavelength. probability shaping technology has greatly improved bit error...
A multi-wavelength light drivable bilayer actuator is fabricated by depositing a thin layer of reduced graphene oxide (RGO) onto flexible poly(dimethyl siloxane) (PDMS) substrate. The RGO/PDMS film shows fast and reversible bending/unbending motions upon exposure to UV light, visible or near-infrared (NIR). photo-thermal effect the pump lights studied measuring comparing induced temperature rises on film. results demonstrate that RGO absorbs converts into heat. Thus undergoes thermal...
This paper proposes a novel chaotic power division multiplexing (CPDM) for secure optical multiple access. The proposed CPDM can not only improve spectral efficiency and the user number by spectrally overlaid OFDM signals at different ratio, but also ensure information security of users implementing encryption on physical layer. key space scheme is up to <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math...
A parallel bit-interleaved filter-bank multicarrier/offset quadrature amplitude modulation (FBMC/OQAM) security strategy based on four-dimensional chaos is proposed in this paper. After the QAM constellation point distribution disturbed, modulated FBMC bits and symbols are interleaved encrypted to realize improvement of FBMC/OQAM system physical layer performance. The chaotic sequence generated by hyperchaotic optimized calculated control disturbance process, which enhances performance...
This paper proposes a high-security multi-level constellation shaping trellis-coded modulation (TCM) method based on clustering mapping rules, which is suitable for passive optical networks (PON) using three-dimensional (3D) carrier-less amplitude and phase (CAP). combines the TCM process with performs of coded signal according to classification label, so as obtain better gain while expanding coding TCM. The 3D generated by adopts Chua's chaotic model rotation encryption, improves ability...
Upwelling, which mixes deep and surface waters, significantly enhances the productivity of waters plays a critical role in marine ecosystems, especially key fishing areas like Zhoushan. This study utilized merged sea temperature data an upwelling edge detection algorithm based on gradients to analyze characteristics Zhoushan Yangtze River Estuary over past 28 years. The results indicate that begins April, peaks July, gradually weakens, disappears by October. phenomenon is most pronounced...
This paper proposes a real-time trajectory prediction method for quadrotors based on bidirectional gated recurrent unit model. Historical data of ten types were obtained. The units constructed and utilized to learn the historic data. results compared with traditional test its performance. efficiency proposed algorithm was investigated by comparing training loss time. over testing datasets showed that model produced better than baseline models all scenarios datasets. It also found can...
We experimentally demonstrate, to the best of our knowledge, temperature and refractive index (RI) sensing with a novel L-like Michelson interferometer (MI). Two MIs are designed based on single-mode fiber (SMF) multimode (MMF), respectively, fabricated via an oxyhydrogen flame rotatable platform. By comparative experiments size bent degree sensor, corresponding parameters sensor excellent performance determined for measurement experiments. The RI sensitivity SMF MI reaches -131.0nm/RIU,...
In this paper, a diversity deoxyribonucleic acid (DNA) chaotic encryption strategy is proposed to enhance the physical layer security of filter bank multi-carrier/offset quadrature amplitude (FBMC/OQAM) system. After input original binary bit stream encrypted, it subjected FBMC/OQAM modulation. The process data dynamically controlled by sequences generated hybrid system composed improved-Logistic and delayed tent sine system, which enhances robustness against malicious attacks illegal...
In this paper, we demonstrate a novel, to the best of our knowledge, transverse-load and high-temperature sensor based on cascaded Vernier effect. Two Fabry–Perot interferometers fabricated by piece hollow-core fiber (HCF) polarization-maintaining photonic crystal (PM-PCF) are connected long part single-mode with length 1 m, play roles sensor, respectively. The sensitivity not only transverse load but also that temperature can be enhanced is raised 7.7 times 5.84 nm/N, sensitivities...
Abstract A fiber optic sensor based on array of silica microspheres and air cavity have been fabricated in fusion splicer experimentally demonstrated this article. The four‐microspheres structure stimulates higher‐order cladding modes the gaussian beam, acts as a coupler for Mach‐Zehnder interferometer (MZI) one hand Fabry‐Perot (FPI) other. sensing head is subjected to temperature transverse load where sensitivity 160 pm/°C 124.6 pm/N are obtained, respectively. Compared with similar...
As social networking services, network covers all the service form which regards human as core, obtains user behavior feature by situational awareness and finds potential relations. By analyzing application system structure of context-aware technology, this paper proposed a mobile P2P based on LTE its Algorithm realized context-aware.
Abstract This paper mainly talks about how backlight sheets prism and LED bar position influence on the ADS mode Open cell transmission. To get a higher transmission, we suggest (90°) above with E LCD, (0°) O diffuser other optical materials cannot be ignored also. Optical film cause is partially polarized light, rather than ideal nature light.
China is annual faced with a large area of bad weather such as fog and haze, which make serious impact on people's daily lives, traffic congestion other flight delays.Currently, the monitoring towards air quality are mostly procured through static station or artificial flow monitoring, whose limitations lie in incomplete data, heavy workload poor quality.Even may result damage to people.Therefore paper designs mobile system.The system uses robot has its own instrument autonomously; takes...