Results 151 to 160 of about 358,900 (366)

Space Inertial Navigation System Accuracy Increasing Using Orbit Point Mass Dynamic [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2013
Flight dynamic equations have an effective role in aerospace technologies. It can be as cheap and efficient means for correcting errors in the spatial position and velocity in inertial navigation systems.
M. Jafari, M. Taefi, J. Roshanian
doaj  

Reconfigurable Acoustofluidic Microvortices for Selective Microcargo Delivery

open access: yesAdvanced Science, EarlyView.
This work introduces a frequency‐encoded, reconfigurable acoustofluidic system that overcomes the low throughput and poor selectivity of conventional micro‐delivery methods. By exploiting discrete microbubble resonances to program adaptive microvortex modes, the platform enables real‐time switching and selective guidance of microscale payloads through ...
Lei Wang   +6 more
wiley   +1 more source

Space shuttle navigation analysis. Volume 2: Baseline system navigation [PDF]

open access: yes
Studies related to the baseline navigation system for the orbiter are presented. The baseline navigation system studies include a covariance analysis of the Inertial Measurement Unit calibration and alignment procedures, postflight IMU error recovery for
Jones, H. L.   +3 more
core   +1 more source

Bridging Green Chemistry and Circular Economy: A Pathway to Sustainable Polyester Plastics Through Feedstock, Synthesis, and Waste Upcycling

open access: yesAdvanced Science, EarlyView.
This review summarizes green and low‐carbon strategies throughout the entire life cycle of polyester plastics, including sustainable monomer synthesis, optimization polymerization, efficient recycling, and advanced upcycling technologies. The synergistic implementation of these strategies is expected to significantly promote the development of a ...
Jinzhou Li   +5 more
wiley   +1 more source

Navigation and attitude reference for autonomous satellite launch and orbital operations [PDF]

open access: yes
The navigation and attitude reference performance of a strapdown system are investigated for applications to autonomous satellite launch and orbital operations.
Kau, S. P.
core   +1 more source

Non‐Equilibrium Synthesis Methods to Create Metastable and High‐Entropy Nanomaterials

open access: yesAdvanced Science, EarlyView.
ABSTRACT Stabilizing multiple elements within a single phase enables the creation of advanced materials with exceptional properties arising from their complex composition. However, under equilibrium conditions, the Hume–Rothery rules impose strict limitations on solid‐state miscibility, restricting combinations of elements with mismatched crystal ...
Shuo Liu   +3 more
wiley   +1 more source

Position Accuracy Improvement of the Inertial Navigation System using LSTM Algorithm without GNSS Signals

open access: yesMajlesi Journal of Electrical Engineering
Currently, satellite navigation systems on cars provide a promising means of making these vehicles unmanned in the future. There is a common problem with these systems due to the unavailability of satellite signals in tunnels, forests, and noisy areas ...
Mohammad Sabzevari   +1 more
doaj   +1 more source

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