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Real-Time Orbit Determination of Micro-Nano Satellite Using Robust Adaptive Filtering.
Sensors (Basel)
December 2024
Huanjiang Laboratory, School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China.
Low-performing GPS receivers, often used in challenging scenarios such as attitude maneuver and attitude rotation, are frequently encountered for micro-nano satellites. To address these challenges, this paper proposes a modified robust adaptive hierarchical filtering algorithm (named IARKF). This algorithm leverages robust adaptive filtering to dynamically adjust the distribution of innovation vectors and employs a fading memory weighted method to estimate measurement noise in real time, thereby enhancing the filter's adaptability to dynamic environments.
View Article and Find Full Text PDFText Font Correction and Alignment Method for Scene Text Recognition.
Sensors (Basel)
December 2024
School of Digital and Intelligent Industry, Inner Mongolia University of Science and Technology, Baotou 014010, China.
Text recognition is a rapidly evolving task with broad practical applications across multiple industries. However, due to the arbitrary-shape text arrangement, irregular text font, and unintended occlusion of font, this remains a challenging task. To handle images with arbitrary-shape text arrangement and irregular text font, we designed the Discriminative Standard Text Font (DSTF) and the Feature Alignment and Complementary Fusion (FACF).
View Article and Find Full Text PDFResidual Stress Analysis at the Conductor-Insulator Interface During the Curing Process of Hair-Pin Motors.
Polymers (Basel)
December 2024
School of Mechanical and Electrical Engineering, Changchun University of Science and Technology, Changchun 130022, China.
The curing process of hair-pin motor stator insulation is critical, as residual stress increases the risk of partial discharge and shortens a motor's lifespan. However, studies on the stress-induced defects during insulation varnish curing remain limited. This research integrates three-dimensional numerical simulations and experimental analysis to develop a curing model based on unsaturated polyester imide resin, aiming to explore the mechanisms of residual stress formation and optimization strategies.
View Article and Find Full Text PDFA Study on the Effect of Indirect Nitrate Supply on the Nitrogen Fixation Capacity of Soybean Nodules.
Plants (Basel)
December 2024
College of Agriculture, Northeast Agricultural University, Harbin 150030, China.
In this study, dual-root soybean ( L. Merr.) plants, with one side nodulated and the other nonnodulated, were used as experimental materials.
View Article and Find Full Text PDFUnveiling the Bioleaching Versatility of .
Microorganisms
November 2024
Department of Biology, University Federico II, 80126 Naples, Italy.
is a Gram-negative bacterium that thrives in extreme acidic conditions. It has emerged as a key player in biomining and bioleaching technologies thanks to its unique ability to mobilize a wide spectrum of elements, such as Li, P, V, Cr, Fe, Ni, Cu, Zn, Ga, As, Mo, W, Pb, U, and its role in ferrous iron oxidation and reduction. catalyzes the extraction of elements by generating iron (III) ions in oxic conditions, which are able to react with metal sulfides.
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