Results 1 to 10 of about 1,115,611 (88)

A modified stochastic model for LS+AR hybrid method and its application in polar motion short-term prediction

Geodesy and Geodynamics, 2023
Short-term (up to 30 days) predictions of Earth Rotation Parameters (ERPs) such as Polar Motion (PM: PMX and PMY) play an essential role in real-time applications related to high-precision reference frame conversion.
Fei Ye, Yunbin Yuan
doaj   +3 more sources

Quantitative Determination of Cd in Soil Using Laser-Induced Breakdown Spectroscopy in Air and Ar Conditions

Molecules, 2018
Rapid detection of Cd content in soil is beneficial to the prevention of soil heavy metal pollution. In this study, we aimed at exploring the rapid quantitative detection ability of laser- induced breakdown spectroscopy (LIBS) under the conditions of air
Xiaodan Liu, Fei Liu, Weihao Huang, Jiyu Peng, Tingting Shen, Yong He   +5 more
doaj   +2 more sources

Structural Damage Identification Based on AR Model with Additive Noises Using an Improved TLS Solution

Sensors, 2019
Structural damage is inevitable due to the structural aging and disastrous external excitation. The auto-regressive (AR) based method is one of the most widely used methods for structural damage identification. In this regard, the classical least-squares
Cai Wu, Shujin Li, Yuanjin Zhang
doaj   +2 more sources

In vitro coupled motions of the whole human thoracic and lumbar spine with rib cage

JOR Spine, 2023
Study design In vitro biomechanical study investigating the coupled motions of the whole normative human thoracic spine (TS) and lumbar spine (LS) with rib cage.
Mattan R. Orbach, Jonathan Mahoney, Brandon S. Bucklen, Sriram Balasubramanian   +3 more
doaj   +1 more source

Research on UT1-UTC and LOD Prediction Algorithm Based on Denoised EAM Dataset

Remote Sensing, 2023
The components of EAM are strongly correlated with LOD and play an important role in UT1-UTC and LOD prediction. However, the EAM dataset is prone to be noisy.
Xishun Li, Yuanwei Wu, Dang Yao, Jia Liu, Kai Nan, Langming Ma, Xuan Cheng, Xuhai Yang, Shougang Zhang   +8 more
doaj   +1 more source

Solar‐Synchronous Tides in Mars Thermosphere CO2, Ar, and N2 Densities From MAVEN

Journal of Geophysical Research - Space Physics, 2023
Measurements of CO2, Ar and N2 densities from the Neutral Gas and Ion Mass Spectrometer on the Mars Atmosphere and Volatile Evolution Mission (MAVEN) between 150 and 200 km altitude during 2015–2022 are analyzed to reveal diurnal (DW1), semidiurnal (SW2)
J. Forbes, Xiao-Li Zhang, Xiao-Hua Fang, M. Benna, F. González-Galindo, F. Forget, E. Millour   +6 more
semanticscholar   +1 more source

Exploration of visual variable guidance in outdoor augmented reality geovisualization

International Journal of Digital Earth, 2023
The visual perception of augmented reality (AR) geovisualization is significantly different from traditional controllable 2D and 3D visualization. In this study, we extended the rendering styles of color variables to include natural material color (NMC ...
Guoyong Zhang, Jun Sun, Jianhua Gong, Dong Zhang, Shui Li, Weidong Hu, Yi Li   +6 more
doaj   +1 more source

Improving the accuracy of polar motion prediction using a hybrid least squares and long short-term memory model

Earth, Planets and Space, 2023
Earth rotation parameters (ERPs) are essential for transforming between the celestial and terrestrial reference frames, and for high-precision space navigation and positioning.
Chenxiang Wang, Pengfei Zhang
doaj   +1 more source

Middle- and Long-Term UT1-UTC Prediction Based on Constrained Polynomial Curve Fitting, Weighted Least Squares and Autoregressive Combination Model

Remote Sensing, 2022
Universal time (UT1-UTC) is a key component of Earth orientation parameters (EOP), which is important for the study of monitoring the changes in the Earth’s rotation rate, climatic variation, and the characteristics of the Earth.
Yuguo Yang, Tianhe Xu, Zhangzhen Sun, Wenfeng Nie, Zhenlong Fang   +4 more
doaj   +1 more source

Randomized controlled trial of ragweed sublingual immunotherapy tablet in the subpopulation of Canadian children and adolescents with allergic rhinoconjunctivitis

Allergy, Asthma & Clinical Immunology, 2021
Background Post hoc analyses of randomized placebo-controlled trials have demonstrated efficacy and tolerability of the ragweed sublingual immunotherapy (SLIT)-tablet in Canadian adults with ragweed pollen-induced allergic rhinitis/conjunctivitis (AR/C).
Anne K. Ellis, Remi Gagnon, David I. Bernstein, Hendrik Nolte   +3 more
doaj   +1 more source