scholarly journals Enhancing Localized Evaporation through Separated Light Absorbing Centers and Scattering Centers

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Dengwu Zhao ◽  
Haoze Duan ◽  
Shengtao Yu ◽  
Yao Zhang ◽  
Jiaqing He ◽  
...  
Keyword(s):  
Scattering Centers

Reduced thermal conductivity due to scattering centers in p-type SiGe alloys

1992 ◽  
Author(s):  
John S. Beaty ◽  
Johnathan L. Rolfe ◽  
Jan Vandersande ◽  
Jean-Pierre Fleurial
Keyword(s):  
Thermal Conductivity ◽  
Scattering Centers ◽  
P Type

Photoelectrode with Multilayer of Gradual Scattering Structure Used in Dye-Sensitized Solar Cells

2013 ◽  
Vol 699 ◽  
pp. 22-27
Author(s):  
Xiao Peng ◽  
Bao Zhang ◽  
Shu Xian Meng ◽  
Xiang Mei Yu ◽  
Zhe Zeng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Photoelectric Conversion ◽  
Emulsion Method ◽  
Dye Sensitized ◽  
Scattering Centers ◽  
Micro Emulsion ◽  
Conversion Efficiencies ◽  
Sensitized Solar Cells

A multilayer TiO2 film featured with gradual scattering structure was developed and used as photoelectrode for dye-sensitized solar cells. This structure of film consists of P25 nanoparticles and TiO2 aggregate which was synthesized by micro-emulsion method as scattering centers The scattering centers were deposited by gradually increasing the amount from the film’s bottom to its top. The special films were used for the studies on the photovoltaic performance of N719 and Zn-3, and their photoelectric conversion efficiencies were 7.34% and 4.04%, respectively. Furthermore, more improvement of the conversion efficiency is realized for Zn-3 than for N719 by using our newly developed multilayer films as photoelectrode compared with ordinary photoelectrode.

Optical Scattering Centers in Polycrystalline Nd:YAG Laser

2005 ◽  
Vol 80 (6) ◽  
pp. 1517-1522 ◽  
Author(s):  
Akio Ikesue ◽  
Kunio Yoshida ◽  
Takahisa Yamamoto ◽  
Isao Yamaga
Keyword(s):  
Nd:Yag Laser ◽  
Optical Scattering ◽  
Scattering Centers

Recognition of jet engines via sparse decomposition of ISAR images using a waveguide scattering model

2017 ◽  
Vol 9 (6) ◽  
pp. 1339-1343 ◽  
Author(s):  
Simon Wagner ◽  
Joachim Ender
Keyword(s):  
Electromagnetic Waves ◽  
Radar System ◽  
Synthetic Aperture ◽  
Jet Engines ◽  
Signal Model ◽  
Common Assumption ◽  
Sparse Decomposition ◽  
Imaging Radar ◽  
Scattering Centers ◽  
The Common

Air target recognition is a critical step in the radar processing chain and reliable features are necessary to make a decision. The number and position of jet engines are useful features to perform a pre-classification and give a list of possible targets. To extract these features, a sparse decomposition framework for inverse synthetic aperture radar (ISAR) images is presented. With this framework different components of the target can be detected, if signal models for these parts are available. To use it for the detection of jet engines, a review of a signal model for air intakes, which was developed by Borden, is given. This model is based on the common assumption that the propagation of electromagnetic waves inside jet engines has the same dispersive behavior as inside waveguides. With this model a decomposition of a real ISAR image, measured with the tracking and imaging radar system of Fraunhofer FHR, into point-like scattering centers and jet engines is presented.

scholarly journals Feature extraction of SAR scattering centers using M-RANSAC and STFRFT-based algorithm

2016 ◽  
Vol 2016 (1) ◽  
Author(s):  
Hui Sheng ◽  
Yesheng Gao ◽  
Bingqi Zhu ◽  
Kaizhi Wang ◽  
Xingzhao Liu
Keyword(s):  
Feature Extraction ◽  
Scattering Centers

scholarly journals Scattering centers modeling of non-anechoic measurement environments

2012 ◽  
Vol 10 ◽  
pp. 69-73 ◽  
Author(s):  
K. A. Yinusa ◽  
C. H. Schmidt ◽  
T. F. Eibert
Keyword(s):  
Near Field ◽  
Field Measurements ◽  
Field Pattern ◽  
Far Field ◽  
Scattering Centers ◽  
Field Transformation ◽  
Field Radiation ◽  
Echo Suppression ◽  
Multipath Signals ◽  
Far Field Pattern

Abstract. Near-field measurements are established techniques to obtain the far-field radiation pattern of an Antenna Under Test via near-field measurements and subsequent near-field far-field transformation. For measurements acquired in echoic environments, additional post-processing is required to eliminate the effects of multipath signals in the resulting far-field pattern. One of such methods models the measurement environment as a multiple source scenario whereby the collected near-field data is attributed to the AUT and some scattering centers in the vicinity of the AUT. In this way, the contributions of the AUT at the probe can be separated from those of the disturbers during the near-field far-field transformation if the disturber locations are known. In this paper, we present ways of modeling the scattering centers on equivalent surfaces such that echo suppression is possible with only partial or no information about the geometry of the scatterers.

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