Results 41 to 50 of about 447,526 (198)

Enhancing Seafloor Topography Inversion Based on Marine Gravity Data Using Robust Weighted Total Least Squares

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The seafloor topography (ST) is essential for oceanographic research and geophysical applications, and its modeling relies on satellite altimetry-derived gravity data.
Fengshun Zhu, Rumeng Guo, Jinbo Li, Jianqiao Xu, Jiangcun Zhou, Jinyun Guo, Shuai Zhou, Yang Li, Heping Sun   +8 more
doaj   +1 more source

Review of the mathematical foundations of data fusion techniques in surface metrology [PDF]

, 2015
The recent proliferation of engineered surfaces, including freeform and structured surfaces, is challenging current metrology techniques. Measurement using multiple sensors has been proposed to achieve enhanced benefits, mainly in terms of spatial ...
Ai C, Barker R M, Boudjemaa R, De Boor C, D𝚤ez D C, Fabio R, GmbH W, Golub G H, Hansen C D, Hao C, Hemsley R, Inhull, ISO 25178-6, ISO 25178-604, ISO/DIS 25178-606, JDL, Jiang X, Kjer H M, Leica Microsystems, Low K-L, Mathworks, Raid I, Ramasamy S K, Rasmussen C E, Rasmussen C E, Schabenberger O, Schmit J, Seeger S, Shekhar S, Strutz T, Sun W, Wang J, Weisstein E W, Yamany S M, Yan-Mei C   +34 more
core   +1 more source

Effects of errors-in-variables on the internal and external reliability measures

Geodesy and Geodynamics
The reliability theory has been an important element of the classical geodetic adjustment theory and methods in the linear Gauss-Markov model. Although errors-in-variables (EIV) models have been intensively investigated, little has been done about ...
Yanxiong Liu, Yun Shi, Peiliang Xu, Wenxian Zeng, Jingnan Liu   +4 more
doaj   +1 more source

Performance Capabilities of Long-Range UWB-IR TDOA Localization Systems

EURASIP Journal on Advances in Signal Processing, 2008
The theoretical and practical performance limits of a 2D ultrawideband impulse-radio localization system operating in the far field are studied under the assumption that estimates of location are based on time-difference-of-arrival (TDOA) measurements ...
Divya Rao, Richard J. Barton
doaj   +1 more source

The application of two stage robust weighted least squares and robust bootstrapping procedure on food expenditure data. [PDF]

, 2011
This paper analysed a real data set that were obtained from a simple random sampling of Faculty of Sciences staffs in Universiti Putra Malaysia. It represents the relationship between total food expenditure (response variable) and monthly income ...
Mat Said, Nur Afzan, Midi , Habshah, Rana, Md. Sohel   +2 more
core  

A New Gain-Phase Error Pre-Calibration Method for Uniform Linear Arrays

Sensors, 2023
In this paper, we consider the gain-phase error calibration problem for uniform linear arrays (ULAs). Based on the adaptive antenna nulling technique, a new gain-phase error pre-calibration method is proposed, requiring only one calibration source with ...
Chang Liu, Xiao Tang, Zhi Zhang
doaj   +1 more source

Estimation of a Multimass System Using the LWTLS and a Coefficient Diagram for Vibration-Controller Design [PDF]

, 2008
Vibration caused by mechanical resonance and time delay caused by signal detection and transmission degrade the control performance of a servo controller for a multimass mechanical system.
Hanamoto Tsuyoshi, Yoshioka Yasutoshi
core   +2 more sources

High Precision Compensation for a Total Reflection Prism Laser Gyro Bias in Consideration of High Frequency Oscillator Voltage

Sensors, 2019
Traditional compensation methods based on temperature-related parameters are not effective for complex total reflection prism laser gyro (TRPLG) bias variation.
Yuanbo Tao, Sihai Li, Jiangtao Zheng, Feng Wu, Qiangwen Fu   +4 more
doaj   +1 more source

Additive modeling systems to simultaneously predict aboveground biomass and carbon for Litsea glutinosa of agroforestry model in tropical highlands

Forest Systems, 2023
Aim of study: To develop and cross-validate simultaneous modeling systems for estimating components and total tree aboveground biomass and carbon of Litsea glutinosa in an agroforestry model with cassava.
Bao HUY, Nguyen Q. KHIEM, Nguyen Q. TRUONG , Krishna P. POUDEL, Hailemariam TEMESGEN   +4 more
doaj   +1 more source

Anomalous Zenith Total Delays for an Insular Tropical Location: The Tahiti Island Case

Remote Sensing, 2022
The weighted mean temperature of the troposphere, Tm, is a key parameter in GNSS meteorology. It can be routinely derived based on meteorological data from radiosonde (RS) or numerical weather models. Alternatively, it can be also derived through a least-
Fangzhao Zhang, Peng Feng, Guochang Xu, Jean-Pierre Barriot   +3 more
doaj   +1 more source