搜索结果: 1-15 共查到“光学仪器及技术 Detection”相关记录30条 . 查询时间(0.173 秒)
ON THE ESTIMATION OF POLARIMETRIC PARAMETERS FOR OIL SLICK FEATURE DETECTION FROM HYBRID POL AND DERIVED PSEUDO QUAD POL SAR DATA
SAR RISAT-1 CTLR pseudo-quad pol correlation coefficient sigma naught
2018/11/19
Oil spills in oceans have a significant long term effect on the marine ecosystem and are of prime concern for maritime economy. In order to locate and estimate the oil spread area and for quantitative...
WAVELET FUSION FOR CONCEALED OBJECT DETECTION USING PASSIVE MILLIMETER WAVE SEQUENCE IMAGES
passive millimeter wave sequence images sum of squared difference wavelet fusion concealed object detection
2018/4/30
PMMW imaging system can create interpretable imagery on the objects concealed under clothing, which gives the great advantage to the security check system. Paper addresses wavelet fusion to detect con...
OIL SPILL AISA+ HYPERSPECTRAL DATA DETECTION BASED ON DIFFERENT SEA SURFACE GLINT SUPPRESSION METHODS
Oil Spill Detection Hyperspectral Data Glint Suppression Wavelet Transform Enhanced Lee Filter
2018/4/30
The marine oil spill is a sudden event, and the airborne hyperspectral means to detect the oil spill is an important part of the rapid response. Sun glint, the specular reflection of sun light from wa...
INCORRECT MATCH DETECTION METHOD FOR ARCTIC SEA-ICE RECONSTRUCTION USING UAV IMAGES
Unmanned Aerial Vehicle Digital Surface Model Image Matching Arctic Sea-Ice
2018/3/30
Shapes and surface roughness, which are considered as key indicators in understanding Arctic sea-ice, can be measured from the digital surface model (DSM) of the target area. Unmanned aerial vehicle (...
SINGLE-SHOT SEMANTIC MATCHER FOR UNSEEN OBJECT DETECTION
Convolutional Neural Networks Object Detection Semantic Matching Single-Shot Detector
2018/3/30
In this paper we combine the ideas of image matching, object detection, image retrieval and zero-shot learning for stating and solving the semantic matching problem. Semantic matcher takes two images ...
Multi-spectral data acquisition and processing techniques for damage detection on building surfaces
Cultural Heritage Multispectral Terrestrial Laser Scanning Classification Acquisition Detection Recording
2015/8/25
This paper describes the development and investigation of a multi-spectral laser scanner for non destructive diagnosis of damages on building surfaces. The application of four semiconductor lasers as ...
Coherent Detection for 1550 nm, 5 Gbit/s VCSEL Based 40 km Bidirectional PON Transmission
Coherent Detection VCSEL Based Bidirectional PON Transmission
2011/5/22
Coherent detection of directly modulated 1550nm VCSELs in 5Gbit/s bidi-rectional 40km SSMF PON-links is presented. Receiver sensitivity of –37.3dBm after transmission is achieved with 30dB system marg...
Long-Distance Standard Single-Mode Fiber Transmission of 40-Gbit/s 16QAM Signal with Optical Delay-Detection and Digital Pre-Distortion of Chromatic Dispersion
Long-Distance Standard Single-Mode Fiber Transmission Optical Delay-Detection and Digital Pre-Distortion Chromatic Dispersion
2011/5/21
Dispersion pre-distorted 40-Gbit/s 16QAM transmissions over 800-km standard-single mode fiber(~13300 ps/nm) using delay detection is demonstrated with large tolerance to laser phase noise (1-MHz linew...
Recent Progress on Real-Time DSP for Direct Detection Optical OFDM Transceivers
Recent Progress Real-Time DSP Direct Detection Optical OFDM Transceivers
2011/5/20
We describe recent developments in real-time digital signal processing for direct detection optical OFDM transceivers, including the optimization of high throughput FFT algorithms and receiver synchro...
100 Gb/s Photoreceivers for Coherent and Direct Detection
100 Gb/s Photoreceivers Coherent Direct Detection
2011/5/20
Photoreceivers for coherent and direct detection of 100 Gb/s data rates, consisting either of 90° optical hybrids integrated with pairs of balanced detectors forming coherent QPSK photoreceiver OEICs,...
First demonstration of OPS and burst detection of 160 Gb/s packets through three 52 km-spaced optical nodes
First demonstration OPS burst detection Gb/s packets through three 52 km-spaced optical nodes
2011/5/20
We demonstrate error-free transmission, dynamic switching and burst detection of 160Gbps packets with guardtime ~1ns through 3-nodes that include on-the-fly optical packet switching and instantaneous ...
Efficient Digital Coherent Detection of A 1.2-Tb/s 24- Carrier No-Guard-Interval CO-OFDM Signal by Simultaneously Detecting Multiple Carriers Per Sampling
Coherent communications Phase modulation
2010/6/10
We experimentally demonstrate efficient detection of a 1.2-Tb/s 24-carrier NGI-CO-OFDM signal with 12.5-Gbaud PDM-QPSK carrier-modulation by simultaneously recovering 2 or 3 carriers per 50-GSamples/s...
Generation and Detection of 2.56 Tbit/s OTDM Data using DPSK and Polarisation Multiplexing
Nonlinear optics fibers Fiber optics communications
2010/6/9
Error free and low penalty generation and detection of 2.56 Tbit/s serial data is demonstrated. 1.28 Tbaud pulses are modulated with DPSK and polarisation multiplexed to achieve 2.56 Tbit/s with recor...
Optical Biasing in Direct Detection Optical-OFDM for Improving Receiver Sensitivity
Fiber optics communications Modulation
2010/6/4
We show that replacing of electrical by an optical biasing minimizes the nonlinearity effect of an optical modulator. This allows the amplitude of the driving signal to be increased which increases th...
Detection and Localization of Defects in Monocrystalline Silicon Solar Cell
solar cell electric signals combination of electric and optical methods
2009/12/14
Near-surface defects in solar cell wafer have undesirable influence upon device properties, as its efficiency and lifetime. When reverse-bias voltage is applied to the wafer, a magnitude of electric s...