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A Method for Elevated Ducts Refinement Based on Convolutional Neural Network
Radio ScienceAbstractElevated duct (EleD) is an abnormal atmospheric refraction structure with a suspended trapped layer. The precise and highly resolved elevated duct‐height‐based data (EleDH) is crucial for radio communication systems, especially in electromagnetic wave path loss prediction and EleDH‐producing systems.
Xunyang Zhu +4 more
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Modeling low elevation GPS signal propagation in maritime atmospheric ducts
Journal of Atmospheric and Solar-Terrestrial Physics, 2012Abstract Using the parabolic wave equation (PWE) method, we model low elevation GPS L1 signal propagation in maritime atmospheric ducts. To consider sea surface impedance, roughness, and the effects of earth's curvature, we propose a new initial field model for the GPS PWE split-step solution. On the basis of the comparison between the proposed model
Jinpeng Zhang +4 more
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Long-term vascular volume expansion maintains elevated thoracic duct lymph flow
American Journal of Obstetrics and Gynecology, 1992To investigate the mechanisms responsible for edema seen during pregnancy, we tested whether lymph vessels are able to pump high volumes over long periods of time.In six chronically catheterized nonpregnant ewes, we examined left thoracic duct lymph flow rate and fluid balance responses to the administration of a balanced isotonic solution at a rate of
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Elevated expression of Bmi1 in hepatocellular carcinoma with bile duct tumor thrombi.
Hepato-gastroenterology, 2014Hepatocellular carcinoma (HCC) with bile duct tumor thrombi (BDTT) is a rare event. The Bmi1 gene has been reported to play important roles in cancer initiation and progression. In this study, the expression of Bmi1 in HCC with BDTT was investigated.The expression of Bmi1 was examined immunohistochemically in HCC patients with BDTT (B+ group), HCC ...
Rui, Zhang +5 more
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Verification and Validation of the Satellite Marine-layer/Elevated Duct Height (SMDH) Technique
2012Space and Naval Warfare Systems Command METOC Systems Program ...
Jordan, Mary S., Durkee, Philip A.
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The effects subrefractive layers and elevated ducts on airborne radar and ESM.
This report is an investigation of the effects of anomalous propagation of radar waves, caused by subrefractive layers and elevated ducts, on aircraft radar performance and possible tactics. A test and evaluation of radar coverage for various environmental scenarios is conducted using the Integrated Refractive Effects Prediction System (IREPS) model ...openaire +1 more source
The Role of Elevated Ducting for Radio Service and Interference Fields
1981Harold Dougherty, Evan Dutton
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[Benign elevated lesions of the common bile duct].
Ryoikibetsu shokogun shirizu, 1996K, Kashima, S, Mitsufuji
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