Št. zadetkov: 15
Objavljeni znanstveni prispevek na konferenci
Oznake:
semiconductor compounds;PbTe(Ni);
Far-infrared and magnetic properties of Ni doped PbTe (ZNi = 1 £ 1019 at./cm3)single crystal are investigated in a broad range of temperature and magnetic elds. Far-infrared re°ection spectra were analyzed using a tting procedure based on the modi ed plasmon{two phonon interaction model. Together wi ...
Leto:
2009
Vir:
Fakulteta za strojništvo (UM FS)
Objavljeni znanstveni prispevek na konferenci
Oznake:
crystals;Raman scattering;
In this paper, we present room temperature unpolarized Raman scattering spectra of Ni doped PbTe single crystal sample. Crystal of PbTe(Ni) was grown by the Bridgman method. The Ni concentration in the sample used here was 1* 1019 at./cm3. Well resolved peaks appear at about 126, 143, 181, 362 and 7 ...
Leto:
2009
Vir:
Fakulteta za strojništvo (UM FS)
Video in druga učna gradiva
Oznake:
computer science;machine learning;active learning;computational learning theory;on-line learning;reinforcement learning;semi-supervised learning
We consider two broad families of non-additive loss functions covering a large number of applications: rational losses and tropical losses. We give new algorithms extending the Follow-the-Perturbed-Leader (FPL) algorithm to both of these families of loss functions and similarly give new algorithms e ...
Leto:
2015
Vir:
videolectures.net
Video in druga učna gradiva
Oznake:
computer science;machine learning
We present a new class of density estimation models, Structural Maxent models, with feature functions selected from possibly very complex families. The design of our models is motivated by data-dependent convergence bounds and benefits from new data-dependent learning bounds expressed in terms of th ...
Leto:
2015
Vir:
videolectures.net
Izvirni znanstveni članek
Oznake:
droplet generation;drop-on-demand;metal wire;annular laser beam;
In the paper a novel system for drop-on-demand (DoD) generation from a metal wire is presented, whose main component is a newly developed laser droplet generation head, consisting of annular laser beam shaping optics and a wire feeding system. In the pendant droplet formation phase of the DoD genera ...
Leto:
2016
Vir:
Fakulteta za strojništvo (UL FS)
Objavljeni znanstveni prispevek na konferenci (vabljeno predavanje)
Oznake:
kovinske kapljice;anularni laserski snop;ločitev kapljice;nelinearna dinamika;stabilnost;metal droplets;annular laser beam;droplet detachment;nonlinear dynamics;stability;
Nonlinear phenomena and dynamics of annular laser beam metal droplet generation
Leto:
2015
Vir:
Fakulteta za strojništvo (UL FS)
Objavljeni znanstveni prispevek na konferenci (vabljeno predavanje)
Oznake:
annular laser beam;direct metal deposition;process stability;
The paper provides a description of a direct annular laser beam based metal deposition head, which makes use of axial material feeding and variation of the laser beam intensity distribution (LBID) on the surface of the workpiece. The application and advantages of the developed head are presented by ...
Leto:
2018
Vir:
Fakulteta za strojništvo (UL FS)
Objavljeni znanstveni prispevek na konferenci
Oznake:
kolobarjasti laserski žarki;navarjanje prahu;procesni parametri;izkoristek prahu;annular laser beams;powder cladding;process parameters;powder catchment efficiency;
In the paper a novel annular "ring shaped" laser beam cladding head and related cladding process are presented. In the cladding head a laser beam is shaped into an annular ring and guided coaxially with the powder tube disposing the powder jet in the centre of the focused annular laser beam ring. An ...
Leto:
2016
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
laser droplet generation;temperature measurement;high-speed camera;melting;droplet detachment;fluid dynamics;
This paper presents a high-speed thermal imaging method using a visible light camera, with application to the laser droplet generation process (LDG). In the experiment, a nickel wire-end was exposed to a collimated laser beam, and the subsequent process of wire melting, pendant droplet formation and ...
Leto:
2017
Vir:
Fakulteta za strojništvo (UL FS)
Izvirni znanstveni članek
Oznake:
additive manufacturing;lasers;powder;
An annular laser beam based powder cladding head, which enables an axial powder feeding and variation of the laser beam intensity distribution (LBID) on the workpiece surface is presented. The influence of typical LBIDs, including Ring, Tophat(-), Tophat(+), and Gaussian-like, on a cladding process ...
Leto:
2018
Vir:
Fakulteta za strojništvo (UL FS)