A5100450525- Optical Wireless Communication Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Underwater Vehicles and Communication Systems
- Indoor and Outdoor Localization Technologies
- Advanced Optical Imaging Technologies
- Optical Network Technologies
- Advanced optical system design
- Photonic and Optical Devices
- Advanced Optical Network Technologies
- Gaze Tracking and Assistive Technology
- Millimeter-Wave Propagation and Modeling
- Ocean Waves and Remote Sensing
- Advanced Wireless Communication Techniques
- CCD and CMOS Imaging Sensors
- Climate change and permafrost
- Satellite Communication Systems
- Electrowetting and Microfluidic Technologies
- Ocular and Laser Science Research
- Microwave Imaging and Scattering Analysis
- Advanced Wireless Network Optimization
- Phase Change Materials Research
- Freezing and Crystallization Processes
- Ionosphere and magnetosphere dynamics
- Advanced Image Fusion Techniques
Hunan University
2024
Chinese Academy of Sciences
2024
Anhui Polytechnic University
2023
Kanagawa Institute of Technology
2020
Tsinghua University
2008-2011
National Institute of Advanced Industrial Science and Technology
2003-2008
Through long-term Rayleigh lidar observations during 2010-2022, atmospheric gravity wave (AGW) activities in the middle atmosphere (30–65 km) are statistically investigated at Haikou (110.3°E, 19.9°N) China. In total, 827 quasi-monochromatic AGW events identified from dataset, and vertical wavelength, observed period, propagation direction of dominant waves extracted for each event by analyzing power spectra wave-induced temperature perturbations. It is revealed that 81.7% all were...
A novel dynamic resource allocation algorithm is proposed for matching the OFDMA system in high speed mobile environment, which suffers from inter-carrier interference and large range of versatile users. With non-linear optimization, objective function transmission power can be directly mapped with variables, such as users, channel state information, modulation coding schemes etc. Compared hitherto algorithms IEEE 802.16e, scheme has even more comprehensive capability depicting features...
One of the major subjects for marine resources development and information processing is how to realize underwater short-range large-capacity data transmissions. The acoustic wave an effective carrier has been used transmissions because it lower attenuation in seawater than radio wave, average propagation distance about 10km or more. However, along with imaging transmission data, inherent low speed makes cannot become ideal high-speed communications. On other hand, visible-light wavelength...
The lithocap is a large-scale alteration including silicification, advanced argillic and that developed near the surface by hydrothermal activities. It helpful for exploring high-sulfidation epithermal deposits porphyry in its root deep parts, respectively, used as new prospecting indicator. There are many minerals it difficult to identify them; alunite most representative mineral one of guide exploration; plays an important role assessing metallogenic potential guiding ore prospecting....
A digital pre-coding based serial compressed sensing (CS) ultra-wideband (UWB) communication system is proposed. By establishing a mathematical model, signal detection studied on the CS theory. Simulation results in IEEE 802.15.3a channel model show that with low sampling rate, proposed can operate regime of heavy intersymbol interference.
深海環境の高速データ通信を実現するために,水中での高透過率を持つ可視光LEDを使った海中データ無線通信方式を提案した.縦波である水中音波は空気中より長距離まで伝搬し,現在最も利用されている水中通信手段であるが,伝送速度には限界があり,海中の温度変化がもたらす音速分布の不均一性により音波が屈折し,通信可能な方向に変化が生じるなど,通信安定性に課題がある.一方,波長380 nm-780 nmの可視光波は,海水中での減衰が極めて低く,可視性により,伝搬方向や位置範囲の制御が容易である.特に,光固有の高い指向性と集光性を生かすことにより,大容量の高速無線通信が期待できる.しかしながら,自然水である海水を伝搬する可視光波は,海域環境の変化により分光減衰特性を持つ.そこで本論文では,伝送路の海水濁度の変化に対して,光波長多重自動切り替え機能を有する通信手段を提案する.
Water ubiquitously exists with dissolved salt in both natural and engineered porous media, such as soil, rock, concrete, tissue; therefore, its freezing temperature depression behavior is of particular interest to various scientific communities tackling mechanics physics media. To date, it remains elusive which physical mechanism accounts for how ions affect it. Herein, a series pore-scale experiments were designated investigate the solutions tubes varying pore diameters, solution volumes,...
No-Reference Image Quality Assessment for distorted images has always been a challenging problem due to image content variance and distortion diversity. Previous IQA models mostly encode explicit single-quality features of synthetic obtain quality-aware representations quality score prediction. However, performance decreases when facing real-world restored from restoration models. The reason is that they do not consider the degradation factors low-quality adequately. To address this issue,...
A video-based spatial optical communication method for a wearable information terminal using video camera with an infrared LED ring is proposed. By the image of that captured by camera, physical location and user's messages are carried it can be detected simultaneously. Therefore, data implemented without private users such as address or ID number; thus security privacy will maintained. The effectiveness this demonstrated in multilanguage environment.
A portable information terminal can simultaneously display and transmit data/image bidirectionally in an indoor optical wireless communication environment.
A wavelength-adaptation underwater optical wireless sensor network (UOWSN) is proposed for marine environment development and seafloor resources observation.The method of LED-based visible light communication (VLC) employed creating the among nodes, each node a VLC transceiver.The LED incoherent source, it can neither damage creatures like as coherent laser source nor lose inherent high speediness radiation yet.The technique used to adaptive control seawater turbidity which both have...