8,494 research outputs found
Selections and their Absolutely Continuous Invariant Measures
Let and consider disjoint closed regions in and subintervals such that projects
onto We define the lower and upper maps by the
lower and upper boundaries of respectively. We assume
, to be piecewise monotonic and preserving continuous
invariant measures and , respectively. Let and
be the distribution functions of and The main
results shows that for any convex combination of and
we can find a map with values between the graphs of and
(that is, a selection) such that is the -invariant
distribution function. Examples are presented. We also study the relationship
of the dynamics of multi-valued maps to random maps
Pelletizing analysis of cylinder pelletizer on MgO-fluxed pellets by discrete element method (DEM)
Discrete Element Method (DEM) was used to analyze palletization process of MgO-fluxed pellets in cylinder pelletizer. The effects of the charge ratio and rotational speed of the cylinder pelletizer on the behavior of MgO-fluxed pellets were investigated by using the simulation. The simulation results show that under the condition of a certain gradient angle of the cylinder pelletizer (The gradient angle is 3°), the suitable parameters of the cylinder pelletizer are that the charge ratio is 3 % and the rotational speed N/ critical rotational speed NC is 0,3
Effects of Sowing Date and Phosphorus Fertiliser Application on Winter Survival of Lucerne cv. Aohan in the Northern Semi-Arid Region of China
In the northern semi-arid region of China, winter survival is always a limiting factor for lucerne production, because low temperatures and a dry climate in winter (Zhou et al., 1993; Ma, 2000; Sun & Gui, 2001; Sun et al., 2003). An experiment was conducted to find an appropriate sowing date and P application rate in order to improve lucerne winter survival
Nuclear Matter and Nuclear Dynamics
Highlights on the recent research activity, carried out by the Italian
Community involved in the "Nuclear Matter and Nuclear Dynamics" field, will be
presented.Comment: Proceedings of the 12th Conference on Problems in Theoretical Nuclear
Physics, to appear in Journal of Physics, Conference Serie
Fast-dissolving core-shell composite microparticles of quercetin fabricated using a coaxial electrospray process
This study reports on novel fast-dissolving core-shell composite microparticles of quercetin fabricated using coaxial electrospraying. A PVC-coated concentric spinneret was developed to conduct the electrospray process. A series of analyses were undertaken to characterize the resultant particles in terms of their morphology, the physical form of their components, and their functional performance. Scanning and transmission electron microscopies revealed that the microparticles had spherical morphologies with clear core-shell structure visible. Differential scanning calorimetry and X-ray diffraction verified that the quercetin active ingredient in the core and sucralose and sodium dodecyl sulfate (SDS) excipients in the shell existed in the amorphous state. This is believed to be a result of second-order interactions between the components; these could be observed by Fourier transform infrared spectroscopy. In vitro dissolution and permeation studies showed that the microparticles rapidly released the incorporated quercetin within one minute, and had permeation rates across the sublingual mucosa around 10 times faster than raw quercetin
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