搜索结果: 1-15 共查到“知识库 工学 multilevel”相关记录17条 . 查询时间(0.078 秒)
Optimization of Parameter Settings for Multilevel Image Segmentation in GEOBIA
parameter optimization segmentation quality geographic object-based image analysis (GEOBIA) area fitness rate (AFR) discrepancy goodness
2016/1/25
In geographic object-based image analysis (GEOBIA) segmentation plays a key role since all consequent classification steps depend
on its quality. For evaluating the quality empirical discrepancy and ...
A hybrid multilevel method for high-order discretization of the Euler equations on unstructured meshes
Multigrid methods Newton–Krylov methods Euler equations
2015/7/3
Higher order discretization has not been widely successful in industrial applications to compressible flow simulation. Among several reasons for this, one may identify the lack of tailor-suited,...
Coherent Detected Secure Point-to-Point Optical Fiber Transmission using Ultra-Dense Optical Spectral Phase Coding (UD-SPC) and Multilevel BCJR Equalization
Coherent Detected Secure Point-to-Point Optical Fiber Transmission Ultra-Dense Optical Spectral Phase Coding Multilevel BCJR Equalization
2016/12/2
A secure P2P optical fiber communication scheme based on ultra-dense optical spectral phase coding (UD-SPC) is proposed. The multi-code interference is suppressed by increasing the memory of the multi...
Mobile and Context-Aware GeoBI Applications: A Multilevel Model for Structuring and Sharing of Contextual Information
Context-Awareness Decision Support System (DSS) Mobile Geospatial Business Intelligence (GeoBI) Decision-Making Relevant Contextual Information Context Dimensions Context Modeling Context Sharing Context Structuring, BI Data
2013/3/5
With the requirements for high performance results in the today’s mobile, global, highly competitive, and technology-based business world, business professionals have to get supported by convenient mo...
Improving the Quality of Liquid-Crystal Projection Image by Multilevel Diffractive Grating Technique
liquid-crystal projection system multilevel diffractive grating VLSI process plastic molding pixel depixelization
2011/11/30
A technique using multilevel diffractive gratings to suppress the discrete nature of liquid crystal display (LCD) projection images is demonstrated. The multilevel diffractive gratings, having a cross...
Hybrid Access Network Integrated With Wireless Multilevel Vector and Wired Baseband Signals Using Frequency Doubling and No Optical Filtering
EXPERIMENTAL SETUP optical power Wireless Multilevel Vector
2011/11/17
FIBER-TO-THE-x (FTTx) have been widely constructed for high data rate wired services to provide triple-play services including voice, data, and video [1]. On the other hand, radio-over-fiber (RoF) tec...
Multilevel Optical Modulator with PLC and LiNbO 3 Hybrid Integrated Circuit
Electro-optical devices Waveguide modulators
2015/5/26
Optical modulators with a hybrid configuration of silica-PLCs and LiNbO 3 phase modulators are promising for advanced multilevel modulation formats. Modulators for OFDM-QPSK, 64QAM, and a selectable f...
A WORK-FLOW DESIGN FOR LARGE-AREA MULTILEVEL GEOBIA: INTEGRATING STATISTICAL MEASURES AND EXPERT KNOWLEDGE
expert knowledge trial-and-error statistical optimization approaches classification process classification stages and tasks
2014/6/12
In GEOBIA some researchers concentrate on statistical optimization procedures such as the optimization of segmentation parameters or the selection of features suitable for class descriptions while oth...
Improvement of Chromatic Dispersion and Differential Group Delay Tolerance of Incoherent Multilevel Signaling with Receiver-side Digital Signal Processing
Fiber optics communications Modulation
2015/6/10
Chromatic dispersion and differential group delay tolerance of 30-Gbit/s 8DPSK and 8QAM signaling is investigated experimentally, and we show 1.7 and 1.25 times enhancement of them in 8QAM signaling b...
Digital Optical Phase Locked Loop for Real-Time Coherent Demodulation of Multilevel PSK/QAM
Optical communications Coherent communications
2015/6/8
We propose a digital optical phase locked loop (DOPLL) for real-time demodulation of high-speed multilevel PSK/QAM. It was simply implemented using low-speed digital signal processor after electrical ...
Optimization of Cost Efficient Multilevel-ASK Modulation Formats under the Constraint of Chromatic Dispersion
Modulation Fiber optics communications
2015/6/5
Due to their narrow spectrum, multilevel modulation ASK-formats can increase the chromatic dispersion tolerance of optical systems. Since they suffer more from inter-symbol interference than binary si...
Energy Detection of Multilevel PAM Signals with Systematic Threshold Mismatch
Energy Detection Multilevel PAM Signals Systematic Threshold Mismatch
2009/9/4
We address a symbol decision problem with spectrally efficient energy detected multilevel pulse amplitude modulated (PAM) signals. First, we analytically quantify the relationship between a systematic...
Polarization-Multiplexed Multilevel LDPC-Coded Modulation for Optical Communication Systems
Polarization-Multiplexed Multilevel LDPC-Coded Modulation Optical Communication Systems
2015/7/17
Polarization-multiplexed coded-modulation, with joint coherent MAP detection and soft-iterative decoding, which considers independent symbols transmitted over both polarizations as a super-symbol is p...
Improvement of tolerance to fibre non-linearity of incoherent multilevel signalling for WDM transmission with 10-Gbit/s OOK channels
non-linearity incoherent multilevel signalling WDM transmission 10-Gbit/s OOK channels
2015/7/16
Fibre nonlinear effect on incoherent multilevel signalling with co-propagating 10-G OOK channels is investigated by experiments and numerical simulations, and QAM signals with non-Euclidean decision b...
Optical dispersion-compensation free incoherent multilevel signal transmission over single-mode fiber with digital pre-distortion and phase pre-integration techniques
Optical dispersion-compensation incoherent multilevel signal transmission single-mode fiber
2015/7/31
Incoherent 30-Gbit/s 8-level 400-km and 35.8-Gbit/s 12-level 240-km standard-SMF transmissions are demonstrated without optical dispersion compensation for the first time.