Results 1 to 10 of about 1,317,456 (256)
Formal Uncertainty and Dispersion of Single and Double Difference Models for GNSS-Based Attitude Determination [PDF]
Sensors, 2017 With multi-antenna synchronized global navigation satellite system (GNSS) receivers, the single difference (SD) between two antennas is able to eliminate both satellite and receiver clock error, thus it becomes necessary to reconsider the equivalency ...
Wen Chen +7 more
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Does China’s centralized volume-based drug procurement policy facilitate the transition from imitation to innovation for listed pharmaceutical companies? Empirical tests based on double difference model [PDF]
Frontiers in Pharmacology, 2023 Introduction: The normalized implementation of the centralized volume-based procurement policy for pharmaceuticals is a concerted push for supply-side structural reform of the pharmaceutical industry in China.
Yang Gu, Qian Zhuang
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ISPRS International Journal of Geo-Information, 2021 Ultra-wideband (UWB) technology is suitable for indoor positioning owing to its high resolution and penetration. However, the current UWB positioning methods not only fail to fully analyze errors, but do not have the ability to eliminate gross and large ...
Yinzhi Zhao +4 more
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RapidScat Cross-Calibration Using the Double Difference Technique
Remote Sensing, 2017 RapidScat is a National Aeronautics and Space Administration (NASA) Ku-Band scatterometer that was operated onboard the International Space Station between September 2014 and August 2016 when the mission effectively ended after an irrecoverable ...
Josko Zec +3 more
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Assessment of Swarm Kinematic Orbit Determination Using Two Different Double-Difference Methods
Remote Sensing, 2023 The Swarm mission aims to study the principle and change regularities of the Earth’s magnetic field. Precise orbit determination is essential to the successful implementation of the mission and relevant scientific research.
Rui Zhang +5 more
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Double difference earthquake location with graph neural networks
Earth, Planets and SpaceDouble difference earthquake relocation is an essential component of many earthquake catalog development workflows. This technique produces high-resolution relative relocations between events by minimizing differential measurements of the arrival times ...
Ian W. McBrearty, Gregory C. Beroza
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Buildings, 2023 Nearly 40 percent of worldwide energy and process-related CO2 emissions are produced by the construction sector. China’s construction industry is the largest in the world, with Chinese construction enterprises completing a total output value of RMB 26.39
Jinzhao Tian, Yisheng Liu, Anlin Li
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Frontiers in Environmental Science, 2022 Old industrial bases (municipal districts) play a decisive role in the process of China’s economic development. This study focuses on the upgrading of urban industrial structure.
Qixing Lin +4 more
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Effect of environmental tax reform on corporate green technology innovation
Frontiers in Environmental Science, 2022 China has recently taken several measures to counter the environmental pollution caused by the crude model of past economic development. Among them, taxation has proved especially efficient.
Chuan Zhang +3 more
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Characterisation of GNSS Carrier Phase Data on a Moving Zero-Baseline in Urban and Aerial Navigation
Sensors, 2020 We present analyses of Global Navigation Satellite System (GNSS) carrier phase observations in multiple kinematic scenarios for different receiver types. Multi-GNSS observations are recorded on high sensitivity and geodetic-grade receivers operating on a
Fabian Ruwisch +2 more
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