Results 1 to 10 of about 1,411 (123)

Application of the Steady-state Variable Nutation Angle Method for Faster Determinations of Long T1S–-an Approach Useful for the Design of Hyperpolarized Mr Molecular Probes [PDF]

open access: yesMagnetic Resonance Insights, 2015
In the dissolution-dynamic nuclear polarization technique, molecular probes with long T1s are preferred. 13C nuclei of small molecules with no directly bonded protons or sp313C nuclei with proton positions substituted by deuterons may fulfill this requirement.
Jacob Sosna   +2 more
exaly   +5 more sources

Research on Variable Baseline Coherent Angle Measurement Based on Nutation Scanning

open access: yesPhotonics
In inter-satellite laser communication systems, angular deviations between the boresights of terminals exert an impact on system performance, thereby imposing higher requirements on performance parameters such as the angle measurement accuracy and range ...
Shoufeng Tong
exaly   +4 more sources

The effect of nutation angle on the flow inside a precessing cylinder and its dynamo action

open access: yesPhysics of Fluids, 2023
The effect of the nutation angle on the flow inside a precessing cylinder is experimentally explored and compared with numerical simulations. The focus is laid on the typical breakdown of the directly forced m = 1 Kelvin mode for increasing precession ratio (Poincaré number) and the accompanying transition between laminar and turbulent flows.
Jan Šimkanin   +2 more
exaly   +4 more sources

The effect of the differential rotation of the earth inner core on the free core nutation

open access: yesGeodesy and Geodynamics, 2019
Seismic observations shows that the inner core rotates faster than the mantle and the rotation axis of the inner core may not align with the rotation axis of the mantle. Free core nutation reflects core's information.
Mian Zhang
exaly   +3 more sources

Accuracy Analysis of SINS/CNS Integrated Attitude Determination Based on Simplified Spatio-Temporal Model [PDF]

open access: yesSensors
For ground-based Celestial Navigation System/Strapdown Inertial Navigation System (CNS/SINS) integrated navigation with arcsecond-level accuracy, the current spatio-temporal transformation model involves a considerable amount of astronomical knowledge ...
Conghai Ruan   +4 more
doaj   +2 more sources

Nonlinear and detuning effects of the nutation angle in precessionally forced rotating cylinder flow

open access: yesPhysical Review Fluids, 2016
The flow in a rapidly rotating cylinder forced to precess through a nutation angle a is investigated numerically, keeping all parameters constant except a, and tuned to a triadic resonance at a = 1º. When increasing a, the flow undergoes a sequence of well- characterized bifurcations associated with triadic resonance, involving heteroclinic and ...
Juan Lopez, FRANCISCO Marques
exaly   +4 more sources

Low-power WALTZ decoupling under magic-angle spinning NMR [PDF]

open access: yesMagnetic Resonance
Heteronuclear low-power decoupling using the solution-state wideband alternating-phase low-power technique for zero-residual splitting (WALTZ) sequences has become quite popular in solid-state protein NMR and seems to work well.
L. Thomas, M. Ernst
doaj   +2 more sources

Experimental research of force wave precession gears with rolling element

open access: yesTrudy Odesskogo Politehničeskogo Universiteta, 2020
The main task of modern mechanical engineering is to improve the quality and reliability of machinery and mechanisms while reducing their overall dimensions and increasing cost-effectiveness.
Михайло Володимирович Маргуліс   +1 more
doaj   +5 more sources

Rotations of a Rigid Body Close to the Lagrange Case under the ‎Action of Nonstationary Perturbation Torque [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2022
Perturbed motions of a rigid body, close to the Lagrange case, under the action of restoring and perturbation torques of forces are investigated in the paper. The following problem is formulated: investigating solutions behavior of system of equations of
Dmytro Leshchenko   +2 more
doaj   +1 more source

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