1,720,988 research outputs found
Kinematic and dynamic analyses of the tripode joint
No full textThis paper is concerned with an application of multibody techniques to the dynamic analysis of the tripode joint. The purpose of the mathematical model developed is the computation of all the constraint forces. In fact, the results of this investigation are preliminary for a study on the influence of geometry and inertia design parameters on the noise and vibrations caused by the joint
Multidisciplinary shape optimisation of a 3D structure using linear and non-linear codes: preliminary results
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Design sensitivity analysis method for multidisciplinary shape optimisation problems with linear and non-linear responses
No full textA method to solve shape and size optimisation problems with linear and non-linear responses has been studied taking advantage of statistical methodologies. A nested optimisation procedure has been fixed. The global optimisation problem is decomposed in several subproblems where each non-linear response is locally approximated with a first degree polynomial function identified by the definition and execution of an experimental plan. The approximating functions so obtained are used to evaluate the design sensitivity coefficients required by the optimisation procedure. The numerical results obtained during the optimisation process to verify exactly the value of the non-linear responses are used to verify and to improve the approximating function accuracy. The non-linear design sensitivity analysis method so defined has been used to solve a multidisciplinary shape optimisation problem involving a real 3D automotive structure
WBSCR14, a gene mapping to the Williams-Beuren syndrome deleted region, is a new member of the Mlx transcription factor network.
No full textUAV assisted geological mapping: application to stratigraphy and structural survey
No full textFollowing previous researches and experiences (Casella et al., 2017; Martinez et al, 2017; Nieminski et al. 2017), some experimental tests were carried out during Digital Geological Survey (Geological Sciences MSc.) and Geomatics (Applied Information technology BSc) courses at Urbino University. During the last year field activities students and researchers tested the use of UAV (unmanned aerial vehicle) both commercial (DJI Phantom 3) and in-house built machine.
Because of the reliability, we choose to perform our survey tests using the commercial one.After having digital field mapped an Apennines area where the Miocene turbidite Marnoso Arenacea Formation crops out (Marche- Tuscany border), we choose to fly on top of two already tape measured stratigraphic sections. After some flight we were able to built orthophotos and DEM with points clouds (using Agisoft Photoscan) that could be imported in QGIS 3.0 where we measured the stratigraphic columns, highlighting bedding and key strata. As pros of tape measurement is the direct contact with bedding allowing more accurate observations. In the other side, as cons, the unsafe measurement on vertical cliffs (performed with climbing techniques) can be avoided with reliable remote measurements without noticeable deviations.Moreover we tried to build a 3D geological model of a quite complex triangle zone associated to a main thrust. The UAV flew manually controlled along a creek where the deformed and faulted beds crop out. The very detailed points cloud allowed to draw and build an interpretative model
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