Results 21 to 30 of about 230,214 (378)

Design of Monitoring Framework for Malicious Hidden Process on CloudStack [PDF]

open access: yesJisuanji gongcheng, 2016
Most cloud platforms like CloudStack have no safety plug-in or function to protect the virtual machines.Aiming at this problem,this paper proposes a monitoring framework for malicious hidden process based on Xen virtual machine monitor on CloudStack ...
CUI Jingsong,TIAN Changyou,GUO Chi,YIN Xue
doaj   +1 more source

Global navigation satellite system [PDF]

open access: yes, 2013
The last few years have shown an increased interest in the commercialization of the global navigation satellite system (GNSS), which is often referred to as the global positioning system (GPS) in various applications. A GPS system uses spread spectrum signals-binary phase-shift keying (BPSK)-emitted from satellites in space for position and time ...
  +4 more sources

A Non-Linear Filtering Algorithm Based on Alpha-Divergence Minimization

open access: yesSensors, 2018
A non-linear filtering algorithm based on the alpha-divergence is proposed, which uses the exponential family distribution to approximate the actual state distribution and the alpha-divergence to measure the approximation degree between the two ...
Yarong Luo   +3 more
doaj   +1 more source

A bagging tree-based pseudorange correction algorithm for global navigation satellite system positioning in foliage canyons

open access: yesInternational Journal of Distributed Sensor Networks, 2021
Global navigation satellite system is indispensable to provide positioning, navigation, and timing information for pedestrians and vehicles in location-based services.
Fan Qin   +3 more
doaj   +1 more source

Electron density retrieval from truncated Radio Occultation GNSS data [PDF]

open access: yes, 2019
This paper summarizes the definition and validation of two complementary new strategies, to invert incomplete Global Navigation Satellite System Radio-Occultation (RO) ionospheric measurements, such as the ones to be provided by the future EUMETSAT Polar
Cardellach Galí, Estel   +3 more
core   +2 more sources

Overview of the development of global navigation satellite system

open access: yesJournal of Geography and Cartography, 2022
Global navigation satellite system and its application fields are constantly expanding and deepening. This paper mainly introduces the current situation of global satellite navigation system and its application technology, development trend and ...
J. Ning, Yibin Yao, Xiaohong Zhang
semanticscholar   +1 more source

Spoofing and Anti-Spoofing Technologies of Global Navigation Satellite System: A Survey

open access: yesIEEE Access, 2020
A large number of facts prove that Global Navigation Satellite System (GNSS) has certain security risks and is threatened by attacks. In particular, GNSS civilian signal receivers have some vulnerability in responding to spoofing attack and jamming ...
Zhi-jun Wu   +4 more
semanticscholar   +1 more source

Retrieving Precipitable Water Vapor From Shipborne Multi‐GNSS Observations [PDF]

open access: yes, 2019
©2019. American Geophysical UnionPrecipitable water vapor (PWV) is an important parameter for climate research and a crucial factor to achieve high accuracy in satellite geodesy and satellite altimetry. Currently Global Navigation Satellite System (GNSS)
Ge, Maorong   +8 more
core   +1 more source

Predicting Long-Term Stability of Precise Oscillators under Influence of Frequency Drift

open access: yesSensors, 2018
High-performance oscillators, atomic clocks for instance, are important in modern industries, finance and scientific research. In this paper, the authors study the estimation and prediction of long-term stability based on convex optimization techniques ...
Weiwei Cheng, Guigen Nie
doaj   +1 more source

A Police and Insurance Joint Management System Based on High Precision BDS/GPS Positioning

open access: yesSensors, 2018
Car ownership in China reached 194 million vehicles at the end of 2016. The traffic congestion index (TCI) exceeds 2.0 during rush hour in some cities. Inefficient processing for minor traffic accidents is considered to be one of the leading causes for ...
Wenwei Zuo   +4 more
doaj   +1 more source

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