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A comparative study on different machine learning approaches with periodic items for the forecasting of GPS satellites clock bias.
Sci Rep
January 2025
College of Ocean Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
Accurately predicting satellite clock deviation is crucial for improving real-time location accuracy in a GPS navigation system. Therefore, to ensure high levels of real-time positioning accuracy, it is essential to address the challenge of enhancing satellite clock deviation prediction when high-precision clock data is unavailable. Given the high frequency, sensitivity, and variability of space-borne GPS satellite atomic clocks, it is important to consider the periodic variations of satellite clock bias (SCB) in addition to the inherent properties of GPS satellite clocks such as frequency deviation, frequency drift, and frequency drift rate to improve SCB prediction accuracy and gain a better understanding of its characteristics.
View Article and Find Full Text PDFThe diagnostic accuracy of point-of-care nucleic acid-based isothermal amplification assays for scrub typhus: a systematic review and meta-analysis.
Front Microbiol
January 2025
Department of Epidemiology & Public Health, Central University of Tamil Nadu, Thiruvarur, India.
Introduction: The diagnosis and detection of pathogens such as and is a cause of major concern among the public health community. Unavailability of rapid, cost-effective diagnostic assays contributes to delayed diagnosis and timely treatment. Using the methodology of systematic reviewing and meta-analysis, the study aimed to synthesize and compare the diagnostic performances of all the available isothermal assays for the detection of classical rickettsial diseases.
View Article and Find Full Text PDFLongitudinal associations of flare and damage accrual in patients with systemic lupus erythematosus.
Lupus Sci Med
January 2025
Rheumatology Research Group, Centre for Inflammatory Diseases, School of Clinical Sciences, Monash University, Clayton, Victoria, Australia.
Objective: To estimate the prevalence of organ damage (damage) and flare and to examine longitudinal associations between flares and subsequent damage accrual, in patients with systemic lupus erythematosus (SLE).
Methods: Patients enrolled in the Asia Pacific Lupus Collaboration cohort with ≥3 years of prospectively captured data were studied. Flares were assessed at routine visits, while damage ((Systemic Lupus International Collaborating Clinics/American College of Rheumatology) Damage Index) was assessed annually.
Insight into migration of Cr(VI) in self-hardening slurry materials for trench cutoff wall.
Environ Res
January 2025
Zijin School of Geology and Mining, Fuzhou University, Fuzhou, 350108, China; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China. Electronic address:
The migration and immobilization of heavy metals in soil and groundwater pose significant environmental challenges, particularly in the context of Cr(VI), a highly toxic and mobile contaminant. Self-hardening slurry materials, commonly used for trench cutoff walls, have gained great attention due to their potential for pollutant containment. However, the relationship between their adsorption properties and pollutant diffusion behaviors remains poorly understood.
View Article and Find Full Text PDFSuperconductivity and high hardness in scandium-borides under pressure.
Phys Chem Chem Phys
January 2025
MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics, School of Physics, Xi'an Jiaotong University, 710049, Xi'an, Shaanxi, P. R. China.
Exploration of new superconducting or superhard transition-metal borides has attracted extensive interest in the past few decades. In this study, we conducted comprehensive theoretical investigations in the scandium-boron binary system by employing a structural search method based upon first-principles density functional theory. Among the six predicted superconducting scandium-borides, ScB (3̄) has the highest superconducting transition temperature = 12.
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