The Experts below are selected from a list of 102345 Experts worldwide ranked by ideXlab platform
Seng-tiong Ho - One of the best experts on this subject based on the ideXlab platform.
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High Spatial Resolution Photodetectors Based on
2010Co-Authors: Seng-tiong HoAbstract:A High Spatial Resolution photodetector is designed and realized using a newly developed two-sided nanoscale three-dimensional fabrication technique. Two types of nanopho- todetectors with slab and channel structures are fabricated and characterized. By comparison, nanophotodetectors with channel structures show a 10 times lower dark current, Higher detection Resolution, and signal-to-noise ratio than nanophotodetectors with slab structures. The smallest nanophotodetector fabricated is as small as 100 nm wide. A responsivity of 0.19 A/W at 1310-nm wavelength and 3-V bias for a channelized nanophotodetector is registered, with a photocurrent of 135 nA over a dark current of 1.25 nA. In addition, using a modified near-field scanning optical microscopy-based photocurrent mapping system, we demon- strated a High Spatial Resolution photodetection of 400 nm using a nanophotodetector with channel structure fabricated.
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High Spatial Resolution Photodetectors Based on Nanoscale Three-Dimensional Structures
IEEE Photonics Technology Letters, 2010Co-Authors: Seng-tiong HoAbstract:A High Spatial Resolution photodetector is designed and realized using a newly developed two-sided nanoscale three-dimensional fabrication technique. Two types of nanophotodetectors with slab and channel structures are fabricated and characterized. By comparison, nanophotodetectors with channel structures show a 10 times lower dark current, Higher detection Resolution, and signal-to-noise ratio than nanophotodetectors with slab structures. The smallest nanophotodetector fabricated is as small as 100 nm wide. A responsivity of 0.19 A/W at 1310-nm wavelength and 3-V bias for a channelized nanophotodetector is registered, with a photocurrent of 135 nA over a dark current of 1.25 nA. In addition, using a modified near-field scanning optical microscopy-based photocurrent mapping system, we demonstrated a High Spatial Resolution photodetection of 400 nm using a nanophotodetector with channel structure fabricated.
Xiuwan Chen - One of the best experts on this subject based on the ideXlab platform.
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IGARSS - Design of High-Spatial Resolution remote sensing data processing system and its implementation
Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium 2005. IGARSS '05., 2005Co-Authors: Shuhe Zhao, Cuiyu Song, Zhongzhong Wu, Ziyu Wang, Xiuwan ChenAbstract:High-Spatial Resolution remote sensing data were received much more in recent years. It includes IKONOS data, SPOT-5 PAN data, Quickbird data, etc. They have been used in urban remote sensing, urban planning, precision agriculture, etc. However, there is not an applicable software system for processing High-Spatial Resolution remote sensing data. The paper introduced a design frame for High-Spatial Resolution data processing system. Some key methods for processing High Spatial-Resolution data had been studied. Implementation of methods and system were carried out using Visual C++.
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Design of High-Spatial Resolution remote sensing data processing system and its implementation
Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05., 2005Co-Authors: Shuhe Zhao, Cuiyu Song, Zhongzhong Wu, Ziyu Wang, Xiuwan ChenAbstract:High-Spatial Resolution remote sensing data were received much more in recent years. It includes IKONOS data, SPOT-5 PAN data, Quickbird data, etc. They have been used in urban remote sensing, urban planning, precision agriculture, etc. However, there is not an applicable software system for processing High-Spatial Resolution remote sensing data. The paper introduced a design frame for High-Spatial Resolution data processing system. Some key methods for processing High Spatial-Resolution data had been studied. Implementation of methods and system were carried out using Visual C++.
Nan Ye - One of the best experts on this subject based on the ideXlab platform.
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Toward Evaluating Multiscale Segmentations of High Spatial Resolution Remote Sensing Images
IEEE Transactions on Geoscience and Remote Sensing, 2015Co-Authors: Xueliang Zhang, Pengfeng Xiao, Xuezhi Feng, Li Feng, Nan YeAbstract:Object-based analysis of High Spatial Resolution remote sensing images addresses the matter of multiscale segmentation. However, existing segmentation evaluation methods mainly focus on single-scale segmentation. In this paper, we examine the issue of supervised multiscale segmentation evaluation and propose two discrepancy measures to determine the manner in which geographic objects are delineated by multiscale segmentations. A QuickBird scene in Hangzhou, China, is used to conduct the evaluation. The results reveal the effectiveness of the proposed measures, in terms of method comparison and parameter optimization, for multiscale segmentation of High Spatial Resolution images. Moreover, meaningful indications for selecting suitable multiple segmentation scales are presented. The proposed measures are applicable to performance evaluation and parameter optimization for multiscale segmentation algorithms.
Johan Schoukens - One of the best experts on this subject based on the ideXlab platform.
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Robust data reduction of High Spatial Resolution optical vibration measurements
Journal of Sound and Vibration, 2004Co-Authors: Steve Vanlanduit, Patrick Guillaume, Johan SchoukensAbstract:In several mechanical engineering applications High Spatial Resolution measurements are required. Adapted optical measurement instruments such as the laser scanning Doppler vibrometer (SLDV) and the electronic speckle pattern interferometer (ESPI) exist to perform this task. The result of this High Spatial Resolution measurement is that a large amount of data is available which has to be processed. In addition, care should be taken when processing the measurements, because locations with poor measurement quality typically exist. In this article a method will be developed to reduce the amount of measurements so that further processing is less time consuming. In addition, as a side effect of the data reduction method, poor quality measurements will be filtered and the overall SNR will improve. The method uses an iterative robust two-step spline approximation with an automatic model order determination procedure. The validation of the technique is performed both on scanning laser vibrometer measurements of a car door and a circuit board and on ESPI data.
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Robust data reduction of High Spatial Resolution optical vibration measurements
Journal of Sound and Vibration, 2004Co-Authors: Steve Vanlanduit, Patrick Guillaume, Johan SchoukensAbstract:In several mechanical engineering applications High Spatial Resolution measurements are required. Adapted optical measurement instruments such as the laser scanning Doppler vibrometer (SLDV) and the electronic speckle pattern interferometer (ESPI) exist to perform this task. The result of this High Spatial Resolution measurement is that a large amount of data is available which has to be processed. In addition, care should be taken when processing the measurements, because locations with poor measurement quality typically exist. In this article a method will be developed to reduce the amount of measurements so that further processing is less time consuming. In addition, as a side effect of the data reduction method, poor quality measurements will be filtered and the overall SNR will improve. The method uses an iterative robust two-step spline approximation with an automatic model order determination procedure. The validation of the technique is performed both on scanning laser vibrometer measurements of a car door and a circuit board and on ESPI data. © 2003 Elsevier Ltd. All rights reserved.
Shuhe Zhao - One of the best experts on this subject based on the ideXlab platform.
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IGARSS - Design of High-Spatial Resolution remote sensing data processing system and its implementation
Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium 2005. IGARSS '05., 2005Co-Authors: Shuhe Zhao, Cuiyu Song, Zhongzhong Wu, Ziyu Wang, Xiuwan ChenAbstract:High-Spatial Resolution remote sensing data were received much more in recent years. It includes IKONOS data, SPOT-5 PAN data, Quickbird data, etc. They have been used in urban remote sensing, urban planning, precision agriculture, etc. However, there is not an applicable software system for processing High-Spatial Resolution remote sensing data. The paper introduced a design frame for High-Spatial Resolution data processing system. Some key methods for processing High Spatial-Resolution data had been studied. Implementation of methods and system were carried out using Visual C++.
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Design of High-Spatial Resolution remote sensing data processing system and its implementation
Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05., 2005Co-Authors: Shuhe Zhao, Cuiyu Song, Zhongzhong Wu, Ziyu Wang, Xiuwan ChenAbstract:High-Spatial Resolution remote sensing data were received much more in recent years. It includes IKONOS data, SPOT-5 PAN data, Quickbird data, etc. They have been used in urban remote sensing, urban planning, precision agriculture, etc. However, there is not an applicable software system for processing High-Spatial Resolution remote sensing data. The paper introduced a design frame for High-Spatial Resolution data processing system. Some key methods for processing High Spatial-Resolution data had been studied. Implementation of methods and system were carried out using Visual C++.