نتایج جستجو برای: sentinel 2
تعداد نتایج: 2536283 فیلتر نتایج به سال:
Rural communities rely on smallholder maize farms for subsistence agriculture, the main driver of local economic activity and food security. However, their planted area estimates are unknown in most developing countries. This study explores use Sentinel-1 Sentinel-2 data to map farms. The random forest (RF), support vector (SVM) machine learning algorithms model stacking (ST) were applied. Resu...
The potentials of the forthcoming new European Space Agency‘s (ESA) satellite sensor, Sentinel-2, for archaeological studies was examined in this paper. For this reason, an extensive spectral library of crop marks, acquired through numerous spectroradiometric campaigns, which are related with buried archaeological remains, has been resampled to the spectral characteristics of Sentinel-2. In add...
This study presents the key results of the joint research project PhenoS. The project aimed on the development of algorithms and methods for the selection of optimal time frames for land use classifications based on Sentinel-2 multispectral satellite data. The classification accuracies of an object-based classification framework was improved using optimized spectral indices which were determine...
Purpose. To arouse ophthalmologists' awareness in patient safety by reviewing sentinel events in Ophthalmology submitted to a web-based incident reporting system involving all public hospitals in Hong Kong. Methods. Sentinel events in Ophthalmology reported from November 2007 to October 2014 were identified and classified into different categories for further presentation and analysis. Key cont...
To determine the performance of intraoperative one-step nucleic acid amplification (OSNA) assay in detecting sentinel lymph node metastases compared to postoperative histology taking into account breast cancer molecular classification and to evaluate whether the level of cytokeratin 19 mRNA copy number may be useful in predicting the likelihood of a positive axillary lymph node dissection. OSNA...
The use of sentinel lymph node biopsy for the T1 melanoma is controversial. Recent reports have demonstrated that certain T1 melanomas are at increased risk for early regional metastases and late recurrence when compared with all thin melanomas. The purpose of this study was to review the authors' experience with wide excision and sentinel lymph node biopsy for certain patients with T1 melanoma...
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