Results 31 to 40 of about 229,027 (259)

Real-Time GNSS-Based Attitude Determination in the Measurement Domain

Sensors, 2017
A multi-antenna-based GNSS receiver is capable of providing high-precision and drift-free attitude solution. Carrier phase measurements need be utilized to achieve high-precision attitude. The traditional attitude determination methods in the measurement
Lin Zhao, Na Li, Liang Li, Yi Zhang, Chun Cheng   +4 more
doaj   +1 more source

Real-Time PPP-RTK Performance Analysis Using Ionospheric Corrections from Multi-Scale Network Configurations

Sensors, 2020
The long convergence time required to achieve high-precision position solutions with integer ambiguity resolution-enabled precise point positioning (PPP-RTK) is driven by the presence of ionospheric delays.
Dimitrios Psychas, Sandra Verhagen
doaj   +1 more source

On correspondences between toric singularities and (p,q) webs [PDF]

, 2004
We study four-dimensional N=1 gauge theories which arise from D3-brane probes of toric Calabi-Yau threefolds. There are some standing paradoxes in the literature regarding relations among (p,q)-webs, toric diagrams and various phases of the gauge ...
Aharony, Aharony, Aspinwall, Beasley, Beasley, Bo Feng, Cachazo, Diaconescu, Douglas, Douglas, Feng, Feng, Feng, Feng, Feng, Feng, Francis Lam, Franco, Franco, Franco, Franco, Franco, Govindarajan, Hanany, Hanany, Hanany, Hanany, He, He, Herzog, Herzog, Hori, Klebanov, Leung, Morrison, Tomasiello, Wijnholt, Yang-Hui He   +37 more
core   +4 more sources

MIMO Radar Waveform Optimization With Prior Information of the Extended Target and Clutter [PDF]

, 2009
The concept of multiple-input multiple-output (MIMO) radar allows each transmitting antenna element to transmit an arbitrary waveform. This provides extra degrees of freedom compared to the traditional transmit beamforming approach.
Chun-yang Chen, P. P. Vaidyanathan, Student Member   +2 more
core   +2 more sources

Improving Ambiguity Resolution for Medium Baselines Using Combined GPS and BDS Dual/Triple-Frequency Observations

Sensors, 2015
The regional constellation of the BeiDou navigation satellite system (BDS) has been providing continuous positioning, navigation and timing services since 27 December 2012, covering China and the surrounding area.
Wang Gao, Chengfa Gao, Shuguo Pan, Denghui Wang, Jiadong Deng   +4 more
doaj   +1 more source

Policing in nonhuman primates: partial interventions serve a prosocial conflict management function in rhesus macaques. [PDF]

, 2013
Studies of prosocial policing in nonhuman societies traditionally focus on impartial interventions because of an underlying assumption that partial support implies a direct benefit to the intervener, thereby negating the potential for being prosocial in ...
Beisner, Brianne A, McCowan, Brenda
core   +2 more sources

GPS/BDS RTK Positioning Based on Equivalence Principle Using Multiple Reference Stations

Remote Sensing, 2020
Reliable real-time kinematic (RTK) is crucially important for emerging global navigation satellite systems (GNSSs) applications, such as drones and unmanned vehicles.
Jian Wang, Tianhe Xu, Wenfeng Nie, Guochang Xu   +3 more
doaj   +1 more source

Ambiguity of the Moment Tensor [PDF]

, 2005
An earthquake on a fault separating two dissimilar materials does not have a well-defined moment density tensor. We present a complete characterization of this bimaterial ambiguity in the general case of slip on a fault in an anisotropic medium.
Ampuero, Jean-Paul, Dahlen, F. A.
core   +1 more source

Validation of Soft Classification Models using Partial Class Memberships: An Extended Concept of Sensitivity & Co. applied to the Grading of Astrocytoma Tissues

, 2013
We use partial class memberships in soft classification to model uncertain labelling and mixtures of classes. Partial class memberships are not restricted to predictions, but may also occur in reference labels (ground truth, gold standard diagnosis) for ...
Beleites, Claudia, Salzer, Reiner, Sergo, Valter   +2 more
core   +1 more source

Long-Baseline Real-Time Kinematic Positioning: Utilizing Kalman Filtering and Partial Ambiguity Resolution with Dual-Frequency Signals from BDS, GPS, and Galileo

Aerospace
This study addresses the challenges associated with single-system long-baseline real-time kinematic (RTK) navigation, including limited positioning accuracy, inconsistent signal reception, and significant residual atmospheric errors following double ...
Deying Yu, Houpu Li, Zhiguo Wang, Shuguang Wu, Yi Liu, Kaizhong Ju, Chen Zhu   +6 more
doaj   +1 more source