Results 21 to 30 of about 19,243,848 (252)

A New Combined Adjustment Model for Geolocation Accuracy Improvement of Multiple Sources Optical and SAR Imagery

open access: yesRemote Sensing, 2021
Numerous earth observation data obtained from different platforms have been widely used in various fields, and geometric calibration is a fundamental step for these applications.
Niangang Jiao, Feng Wang, Hongjian You
doaj   +1 more source

Geometric Quality Improvement Method of Optical Remote Sensing Satellite Images Based on Rational Function Model

open access: yesRemote Sensing, 2022
The high-precision geometric positioning of optical remote sensing satellites is the prerequisite to determine the application capability of satellite image products.
Qingyang Li   +5 more
doaj   +1 more source

Network model of on-chip antennas [PDF]

open access: yesAdvances in Radio Science, 2011
A Network model of an ultra-wide band, intra-chip wireless link is presented. Numerical data of Z-parameters, obtained from full wave simulation of the structure, are used to obtain a rational function representation via the Vector Fitting procedure ...
F. Mukhtar, H. Yordanov, P. Russer
doaj   +1 more source

Sparse Rational Polynomial Coefficient Estimation Method via Low-Rank Matrix Constraint

open access: yesRemote Sensing
The rational function model (RFM) is an important general imaging model in remote sensing image geometric processing, which is composed of many rational polynomial coefficients (RPCs). However, due to the correlation among the high-order polynomials, the
Congzhen Hu   +5 more
doaj   +1 more source

A Study on the Direct Optimization of a Rational Function Model for High-Resolution Satellite Images

open access: yesRemote Sensing
Due to the influence of factors such as satellite jitters, orbital errors, star sensor errors, and satellite clock errors, significant geometric systematic errors often exist among multi-view satellite images.
Danchao Gong, Yilong Han, Xu Huang
doaj   +1 more source

The Impact of the COVID‐19 Pandemic on Childhood Cancer Survival: A Population‐Based Assessment of Survival Patterns Between 2015 and 2023 in Germany

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Numerous international studies have reported declines in new cancer diagnoses, delayed diagnoses and disruptions in cancer treatment following the implementation of COVID‐19 pandemic public health measures, raising concerns that these effects may ultimately contribute to increased cancer mortality.
Friederike Erdmann   +8 more
wiley   +1 more source

On the Passivity of the Delay-Rational Green’s-Function-Based Model for Transmission Lines

open access: yes, 2019
In this paper, we study the delay-rational Green’s-function-based (DeRaG) model for transmission lines. This model is described in terms of impedance representation and it contains a rational and a hyperbolic part.
Antonini G.   +3 more
core   +2 more sources

Referral Patterns and Diagnostic Timeliness in Pediatric Cancer: A Hospital‐Based Study in Indonesia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Timely diagnosis and treatment are critical for improving survival among children with cancer. In low‐ and middle‐income countries (LMICs), delays are common and may be influenced by fragmented referral pathways and diagnostic limitations.
Nur Melani Sari   +5 more
wiley   +1 more source

A New RD-RFM Stereo Geolocation Model for 3D Geo-Information Reconstruction of SAR-Optical Satellite Image Pairs

open access: yesIEEE Access, 2020
Nowadays, numerous earth-observation data are obtained from different kinds of platforms, in which data from synthetic aperture radar (SAR) sensors and optical sensors account for the vast majority.
Niangang Jiao, Feng Wang, Hongjian You
doaj   +1 more source

Bone and Soft Tissue Neoplasms in Infants Versus Older Children: A Report From the Cancer in Young People in Canada Program

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background and Aims Infant bone and soft tissue neoplasms present distinct clinical challenges and lack large‐scale data to inform treatment decisions. This study aims to characterize bone and soft tissue neoplasms in infants in Canada and to compare their outcomes with those of older pediatric patients.
Samuel Sassine   +21 more
wiley   +1 more source

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