38 research outputs found
Comparisons of nonlinear estimators for wastewater treatment plants
This paper deals with five existing nonlinear estimators (filters), which include Extended Kalman Filter (EKF), Extended H-infinity Filter (EHF), State Dependent Filter (SDF), State Dependent H-Infinity Filter (SDHF) and Unscented Kalman Filter (UKF) that are formulated and implemented to estimate unmeasured states of a typical biological wastewater system. The performance of these five estimators of different complexities, behaviour and advantages are demonstrated and compared via nonlinear simulations. This study shows promising application of UKF for monitoring and control of the process variables, which are not directly measurable
Monte Carlo Study of 8-State Potts Model on 2D Random Lattices
We study the effect of quenched coordination-number disorder of random
lattices on the nature of the phase transition in the two-dimensional
eight-state Potts model, which is of first order on regular lattices. We
consider Poissonian random lattices of toroidal topology constructed according
to the Voronoi/Delaunay prescription. Monte Carlo simulations yield strong
evidence that the phase transition remains first order.Comment: 4 pages, PostScript, contribution to LATTICE95. See also
http://www.cond-mat.physik.uni-mainz.de/~janke/doc/home_janke.htm
Two-Dimensional 8-State Potts Model on Random Lattices: A Monte Carlo Study
We use two-dimensional Poissonian random lattices of Voronoi/ Delaunay type
to study the effect of quenched coordination number randomness on the nature of
the phase transition in the eight-state Potts model, which is of first order on
regular lattices. From extensive Monte Carlo simulations we obtain strong
evidence that the phase transition remains first order for this type of
quenched randomness. Our result is in striking contrast to a recent Monte Carlo
study of quenched bond randomness for which the order of the phase transition
changes from first to second order.Comment: 9 pages, uuencoded, includes 5 figures, 122332 byte
Three-Dimensional 3-State Potts Model Revisited With New Techniques
We report a fairly detailed finite-size scaling analysis of the first-order
phase transition in the three-dimensional 3-state Potts model on cubic lattices
with emphasis on recently introduced quantities whose infinite-volume
extrapolations are governed `only' by exponentially small terms. In these
quantities no asymptotic power series in the inverse volume are involved which
complicate the finite-size scaling behaviour of standard observables related to
the specific-heat maxima or Binder-parameter minima. Introduced initially for
strong first-order phase transitions in q-state Potts models with ``large
enough'' q, the new techniques prove to be surprisingly accurate for a q value
as small as 3. On the basis of the high-precision Monte Carlo data of Alves `et
al.' [Phys. Rev. B43 (1991) 5846], this leads to a refined estimate of for the infinite-volume transition point.Comment: 25 pages, LaTeX + 9 postscript figures. Submitted to Nucl. Phys. B.
See also http://www.cond-mat.physik.uni-mainz.de/~janke/doc/home_janke.htm
Geological, geochemical and mineralogical characteristics of REE-bearing Las Mercedes bauxite deposit, Dominican Republic
Bauxite deposits, traditionally the main source of 'aluminum, have been recently targeted for their remarkable contents in rare earth elements (REE). With Sigma REE (lanthanoids + Sc + Y) concentrations systematically higher than similar to 1400 ppm (ay. = 1530 ppm), the Las Mercedes karstic bauxites in the Dominican Republic rank as one of the REE-richest deposits of its style.The bauxitic ore in the Las Mercedes deposit is mostly unlithified and has a homogeneous-massive lithostructure, with only local cross-stratification and graded bedding. The dominant arenaceous and round-grained texture is composed of bauxite particles and subordinate ooids, pisoids and carbonate clasts. Mineralogically, the bauxite ore is composed mostly of gibbsite and lesser amounts of kaolinite, hematite, boehmite, anatase, goethite, chromian spinel and zircon. Identified REE-minerals include cerianite and monazite-Ce, whose composition accounts for the steady enrichment in light-relative to medium-and heavy-REE of the studied bauxites.Considering the paleo-geomorphology of the study area, we propose that bauxites in the Las Mercedes deposit are the product of the erosion and deposition of lithified bauxites located at higher elevations in the Bahoruco ranges. Based on the available data, we suggest a mixed lithological source for the bauxite deposits at the district scale: bedrock carbonates and an igneous source of likely mafic composition. (C) 2017 Elsevier B.V. All rights reserved
Ising model on 3D random lattices: A Monte Carlo study
We report single-cluster Monte Carlo simulations of the Ising model on
three-dimensional Poissonian random lattices with up to 128,000 approx. 503
sites which are linked together according to the Voronoi/Delaunay prescription.
For each lattice size quenched averages are performed over 96 realizations. By
using reweighting techniques and finite-size scaling analyses we investigate
the critical properties of the model in the close vicinity of the phase
transition point. Our random lattice data provide strong evidence that, for the
available system sizes, the resulting effective critical exponents are
indistinguishable from recent high-precision estimates obtained in Monte Carlo
studies of the Ising model and \phi^4 field theory on three-dimensional regular
cubic lattices.Comment: 35 pages, LaTex, 8 tables, 8 postscript figure
The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar and APOGEE-2 Data
This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the complete release of the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, which reached its goal of surveying over 10,000 nearby galaxies. The complete release of the MaNGA Stellar Library (MaStar) accompanies this data, providing observations of almost 30,000 stars through the MaNGA instrument during bright time. DR17 also contains the complete release of the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) survey which publicly releases infra-red spectra of over 650,000 stars. The main sample from the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), as well as the sub-survey Time Domain Spectroscopic Survey (TDSS) data were fully released in DR16. New single-fiber optical spectroscopy released in DR17 is from the SPectroscipic IDentification of ERosita Survey (SPIDERS) sub-survey and the eBOSS-RM program. Along with the primary data sets, DR17 includes 25 new or updated Value Added Catalogs (VACs). This paper concludes the release of SDSS-IV survey data. SDSS continues into its fifth phase with observations already underway for the Milky Way Mapper (MWM), Local Volume Mapper (LVM) and Black Hole Mapper (BHM) surveys
Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU
Contains fulltext :
172380.pdf (publisher's version ) (Open Access