Results 61 to 70 of about 135,008 (218)

Autonomous navigation system [PDF]

open access: yes, 1981
An inertial navigation system utilizing a servo-controlled two degree of freedom pendulum to obtain specific force components in the locally level coordinate system is described.
Merhav, S. J.
core   +1 more source

Analysis, Mathematical Model and Selected Simulation Research of the GNSS Navigation Receiver Correlator

open access: yesMATEC Web of Conferences, 2018
The article presents a mathematical model describing the physical phenomena occurring in the GNSS radio receiver. The main subunit which focused attention was the system of GNSS receiver correlator.
Setlak Lucjan, Kowalik Rafał
doaj   +1 more source

A Novel Fault Diagnosis Method Based on Noise-Assisted MEMD and Functional Neural Fuzzy Network for Rolling Element Bearings

open access: yesIEEE Access, 2018
To solve the problem in which the auxiliary white-noise parameters need to be artificially selected in a noise-assisted multivariate empirical mode decomposition (NA-MEMD) and considering the fact that obtaining a large number of typical fault samples in
Sheng Liu, Yue Sun, Lanyong Zhang
doaj   +1 more source

In vivo tumor detection with combined MR–Photoacoustic-Thermoacoustic imaging [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2016
Here, we report a new method using combined magnetic resonance (MR)–Photoacoustic (PA)–Thermoacoustic (TA) imaging techniques, and demonstrate its unique ability for in vivo cancer detection using tumor-bearing mice.
Lin Huang   +9 more
doaj   +1 more source

Fault Diagnosis of Water Lubricated Stern Bearing based on BP Neural Network

open access: yesJixie chuandong, 2015
The water lubricated stern bearing is a special bearings which widely used in ships and other water vessels sail propulsion system,because of its work environment is of great uncertainty,the product is prone to various of failures,once the failure ...
Liang Feng, Zhang Dandan, Zhang Ronghua
doaj  

Galileo early cruise, including Venus, first Earth, and Gaspra encounters [PDF]

open access: yes, 1992
This article documents Deep Space Network (DSN) support for the Galileo cruise to Jupiter. The unique trajectory affords multiple encounters during this cruise phase.
Beyer, P. E.   +2 more
core   +1 more source

Robotic Tankette for Intelligent BioEnergy Agriculture: Design, Development and Field Tests [PDF]

open access: yes, 2018
In recent years, the use of robots in agriculture has been increasing mainly due to the high demand of productivity, precision and efficiency, which follow the climate change effects and world population growth. Unlike conventional agriculture, sugarcane
Barbosa, Evelyn S.   +5 more
core   +2 more sources

Bilateral sacroiliac joint dislocation treated by posterior instrumentation case report and literature review

open access: yesArchives of Trauma Research, 2019
Sacroiliac joint dislocation is an uncommon and potentially life-threatening injury secondary to high-energy trauma. Given that bilateral sacroiliac joint dislocation has rarely been reported, its management constitutes a clinical challenge.
Fernando Moreno Mateo   +5 more
doaj   +1 more source

The Application and Development of Static Pressure Air Floating in the Field of Micro-Low-Gravity Simulation Experiments for Spacecraft

open access: yesLubricants
The force conditions experienced by spacecraft and astronauts in space are vastly different from those in Earth’s gravitational environment, hence it is necessary to conduct adequate micro-low-gravity environment simulation tests on the ground before ...
Libin Zang   +8 more
doaj   +1 more source

Evidence consistent with the multiple-bearings hypothesis from human virtual landmark-based navigation [PDF]

open access: yesFrontiers in Psychology, 2015
One approach to explaining the conditions under which additional landmarks will be learned or ignored relates to the nature of the information provided by the landmarks (i.e., distance versus bearings). In the current experiment, we tested the ability of such an approach to explain the search behavior of human participants in a virtual landmark-based ...
Forloines, Martha R.   +2 more
openaire   +4 more sources

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