نتایج جستجو برای: dbf
تعداد نتایج: 242 فیلتر نتایج به سال:
Radio frequency interference (RFI) is becoming a major concern for future synthetic aperture radar (SAR) missions due to the increased user demand occupation in number of applications. Each occurrence introduces artifacts imagery, biasing measurements and leading erroneous results. In addition conventional techniques, use multichannel SAR RFI mitigation has been proposed, because its digital be...
Abstract Oxygen-containing polycyclic aromatic hydrocarbons (OPAHs) have been considered as potential carriers of the 11.3 μm band in interstellar observations. To begin to probe their contribution chemistry medium, we report here threshold photoelectron spectra (TPES) for seven oxygen-containing 2,3-benzofuran (BF), 2,3-dihydrobenzofuran (DHF), phthalan (PH), dibenzofuran (DBF), dibenzo(B,F)ox...
BACKGROUND A better metabolic control is an important objective of health care in diabetes mellitus. This objective has been achieved elsewhere, incorporating group visits to the usual care of diabetic patients. AIM To evaluate the effects of a primary care group visit model after 9 and 15 months of implementation, on the metabolic control of diabetic patients. MATERIAL AND METHODS Two coho...
To adjust for the non-uniform spatiotemporal nature of traffic patterns, next-generation high throughput satellite (HTS) systems can benefit from recent technological advancements in space-segment order to dynamically design traffic-adaptive beam layout plans (ABLPs). In this work, we propose a framework dynamic beamforming (DBF) optimization and adaptation environments. Given realistic pattern...
Background: Calcitonin gene-related peptide (CGRP) is pivotal in the pathophysiology of migraine headaches and represents a promising target for migraine treatment. The humanized monoclonal antibody galcanezumab (LY2951742) binds to CGRP and may be effective in migraine prophylaxis. Objectives: The primary objective was to evaluate the safety and tolerability of single and multiple doses of gal...
This paper proposes a hybrid multichannel processing method for spaceborne Hybrid Phased-MIMO SAR (HPMSAR) that can achieve different applications of multi-direction swath imaging on the same platform. The method is optimal because it is a combination of two-dimension (2D) advanced digital beamforming (DBF) technology and multichannel pre-filter technology for highresolution wide-swath SAR sign...
The objective of this project is to develop technologies that produce improvements in time to orbit, cost, and performance of U.S satellite systems. Through these efforts, the pre-eminence of the U.S. space industry can be regained. In order to accomplish this objective, the Center will perform multidisciplinary research in the areas of small satellite technologies. The Center will utilize a de...
The novel TOPS mode can achieve wide swath imaging coverage at the cost of impaired azimuth resolution. MIMO-SAR systems combined with multi-channel SAR signal reconstruction in azimuth and digital beamforming (DBF) on receive in elevation can overcome the inherent contradiction between swath width and azimuth resolution of conventional SAR systems. This paper derives a novel spaceborne MIMO-TO...
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