搜索结果: 1-15 共查到“工学 Backscattering”相关记录17条 . 查询时间(0.046 秒)
THE LOW BACKSCATTERING OBJECTS CLASSIFICATION IN POLSAR IMAGE BASED ON BAG OF WORDS MODEL USING SUPPORT VECTOR MACHINE
Low Backscattering Objects Bag of Words SIFT features Support Vector Machine
2018/5/16
Due to the forward scattering and block of radar signal, the water, bare soil, shadow, named low backscattering objects (LBOs), often present low backscattering intensity in polarimetric synthetic ape...
An application on optical backscattering reflectometer OBR
Bending loss splicing loss of detail short fiber network optical fiber optical fiber type reflectometer
2014/12/31
The main objective of this project is to understand the basics information on bending loss and splice loss with detail experiment on Luna instrument for a short network fiber. A historical perspective...
The synergy of optical data with microwave backscattering model for the retrieval of soil and vegetation conditions in heterogeneous Mediterranean environment
Remote Sensing SAR Mediterranean Biomass Semi-empirical modeling
2014/12/29
Estimation of soil moisture and vegetation biomass over wide regions is needed for a better understanding of ecological conditions and for monitoring desertification processes in fragile environments ...
Radar backscattering measurement of bare soil and vegetation covered soil using X-band and full polarization
Land Cover Active Remote Sensing Microwave Remote Sensing Radar backscatter Scatterometer Look angle Polarization
2014/12/15
The objective of the study is to measure backscattered power of bare soil and vegetation covered soil using X-band scatterometer system with full polarization and various angles during monsoon season ...
Study of Discrimination Between Plantation and Dense Scrub Based on Backscattering Behavior of C Band SAR Data
Polarization RISAT-I ENVISAT ASAR
2014/12/15
The study about on landuse and landcover classification using multi polarization and multi temporal C-band Synthetic Aperture Radar (SAR) data of recently launched multi-mode of RISAT-1 (Radar Imaging...
The backscattering characteristics of thermokarst lake ice in the qinghai-tibet plateau from SAR
Backscattering Thermokarst Lake ice QTP SAR Temporal variability
2014/9/29
A thermokarst lake is an important indicator of changes in climate, which cause considerable thermal distribution to the surrounding permafrost. The imaging radar has demonstrated the capability to de...
Modeling Coherent Backscattering Errors in Fiber Optic Gyroscopes for Sources of Arbitrary Line Width
Backscattering drift backscattering noise fi ber optic gyroscope laser phase noise
2015/8/7
We present a new model of the noise and drift induced by coherent backscattering in a fiber optic gyroscope (FOG) interrogated with a light source of arbitrary temporal coherence. This study is ...
BACKSCATTERING OF INDIVIDUAL LIDAR PULSES FROM FOREST CANOPIES EXPLAINED BY PHOTOGRAMMETRICALLY DERIVED VEGETATION STRUCTURE
Canopy imaging silhouette footprint echo triggering waveform LiDAR
2014/4/24
In recent years, airborne LiDAR sensors have shown remarkable performance in the mapping of forest vegetation. This experimental study looks at LiDAR data at the scale of individual pulses to elucidat...
SPHERES, Julich's High-Flux Neutron Backscattering Spectrometer at FRM II
SPHERES Julich's High-Flux Neutron FRM II Instrumentation and Detectors
2012/4/24
SPHERES (SPectrometer with High Energy RESolution) is a third-generation neutron backscattering spectrometer, located at the 20 MW German neutron source FRM II and operated by the Juelich Centre for N...
Measurement of reduced backscattering noise in laser-driven fiber optic gyroscopes
reduced backscattering noise laser-driven optic gyroscopes
2015/8/10
We report what we believe to be the first demonstration of a laser-driven fiber optic gyroscope (FOG) built with an air-core fiber. Its phase noise is measured to be 130 rad/ Hz. W...
Using Wavelength Splitting at the Remote Node to Mitigate Rayleigh Backscattering for Optical Wired and Wireless Access Networks
Fiber optics communications Optical communications
2015/6/10
We demonstrate an optical wired and wireless access network using wavelength-splitting (WS) at remote-node. A pair of CW carriers is generated from each laser source for wired and wireless application...
Wavelength Conversion Towards Rayleigh Backscattering Tolerant PONs via Four-Wave Mixing in SOA-based ONUs
Fiber optics communications Nonlinear optics four-wave mixing
2015/6/8
Wavelength shifting in PONs with downstream signal remodulation is presented,allowing upstream transmission over trees with 25km feeder and 1:32 split with penalties <2dB,originally Rayleigh backscatt...
Single Feeder Bidirectional WDM-PON with Enhanced Resilience to Rayleigh-Backscattering
Fiber optics Communications Fiber optics links subsystems
2015/6/8
We report a system demonstration of 6dB-enhanced tolerance to distributed reflections for WDM-PONs using commercial 1.25Gb/s SFP reflective transceivers. The scheme, based on 8B10B-coding and high-pas...
Effects of Rayleigh Backscattering in Long-Reach RSOA-Based WDM PON
Fiber optics links subsystems Semiconductor optical amplifiers
2015/6/8
We investigate the effects of Rayleigh backscattering in a long-reach RSOA-based WDM PON. The results show that the Rayleigh-induced penalty depends highly on the gain of the remote EDFA and the lengt...
Influence of Rayleigh Backscattering on the Performance of NOLM-Based Phase-Preserving Amplitude Limiters
Nonlinear optics fibers Phase modulation
2015/6/5
Design and fiber optimization in NOLM-type regenerators allow for a substantial decrease in excess noise originating from Rayleigh backscattering. Cascaded operation of up to 20 phase-preserving limit...