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71.
The statistical tools of Complex Network Analysis are of useful to understand salient properties of complex systems, may these be natural or pertaining human engineered infrastructures. One of these that is receiving growing attention for its societal relevance is that of electricity distribution. In this paper, we present a survey of the most relevant scientific studies investigating the properties of different Power Grids infrastructures using Complex Network Analysis techniques and methodologies. We categorize and explore the most relevant literature works considering general topological properties, physical properties, and differences between the various graph-related indicators and reliability aspects. We also trace the evolution in such field of the approach of study during the years to see the improvement achieved in the analysis. 相似文献
72.
We report a novel controllable source of spatial decoherence for twin photons, based upon commercially available wedge depolarizers. This allows us to convert the polarization-entangled singlet state into a tunable mixed state. A full characterization of this mixed state, by means of quantum tomography, shows that such a spatial decoherer can be used for synthesizing Werner-like states on demand. 相似文献
73.
Andreea Ionescu Rossella Caligiuri Nicolas Godbert Angela Candreva Massimo LaDeda Emilia Furia Mauro Ghedini Iolinda Aiello 《化学:亚洲杂志》2019,14(17):3025-3034
A series of electropolymerizable cyclometallated IrIII complexes were synthesized and their electrochemical and photophysical properties studied. The triphenylamine electropolymerizable fragment was introduced by using triphenylamine‐2‐phenylpyridine and, respectively, triphenylamine‐benzothiazole as cyclometalated ligands. The coordination sphere was completed by two differently substituted β‐ketoiminate ligands deriving from the condensation of acetylacetone or hexafluoroacetylacetone with para‐bromoaniline. The influence of the ‐CH3/‐CF3 substitution to the electrochemical and photophysical properties was investigated. Both complexes with CH3 substituted β‐ketoiminate were emissive in solution and in solid state. Highly stable films were electrodeposited onto ITO coated glass substrates. Their emission was quenched by electron trapping within the polymeric network as proven by electrochemical studies. The ‐CF3 substitution of the β‐ketoiminate leads instead to the quenching of the emission and inhibits electropolymerization. 相似文献
74.
E. Aiello G. Dattolo G. Cirrincione A. M. Almerico 《Journal of heterocyclic chemistry》1984,21(3):721-724
An intramolecular nucleophilic substitution in the pyrrole series has been generalized. The behaviour of nitro, chlorine, bromine and iodine as leaving groups towards the nucleophilic amino group was observed. An acid catalyzed mechanism has been proposed. 相似文献
75.
L. Aiello D. Riccio P. Ferraro S. Grilli L. Sansone G. Coppola S. De Nicola A. Finizio 《Optics and Lasers in Engineering》2007,45(6):750-755
We present, for the first time to the best of our knowledge, a phase unwrapping method based on an algorithm which makes use of Green's first identity. This method aims at recovering the correct phase information encoded in a fringe pattern after digital holography (DH) numerical processing. DH provides a quantitative measurement of the three-dimensional surface profile of objects. The information about the profile can be obtained in principle from the phase-map. However, the measured phase-map provides the actual phase values wrapped mod.2π so that an unwrapping process is required in order to reconstruct the object profile. 相似文献
76.
Cesare Oliviero Rossi Carmen Cretu Loredana Ricciardi Angela Candreva Massimo La Deda Iolinda Aiello 《Liquid crystals》2017,44(5):880-888
Luminescent complexes with general formula [(C^N)2Ir(N^N)]OCOCH3, where C^N = 2-phenylpyridine (ppy) and N^N = 2,2?-bipyridine (bpy), self-assemble into ordered ‘soft’ viscous mesophases of chromonic type. By changing the ancillary ligand with 1,10-phenanthroline (phen), a new mesomorphic complex was obtained. The self-assembly into ordered liquid crystalline phases of chromonic type in water was investigated by comprehensive rheological and photophysical studies. By changing the ancillary ligand bpy with phen, assembly into smaller, more symetric aggregates is favoured, resulting in lower viscosity and more dynamic mesophase. 相似文献
77.
Daniela Aiello Rosario Aiello Flaviano Testa Tonino Martino Iolinda Aiello Massimo La Deda Mauro Ghedini 《Journal of photochemistry and photobiology. A, Chemistry》2009,201(2-3):81-86
New luminescent inorganic–organic hybrid materials incorporating the luminescent zinc(II) complex ZnL2 (λem = 457 nm and Φem = 4.4% reference values for ZnL2; HL = chelating ligand resulting from the reaction between salicylaldehyde and 3-aminopropyltriethoxysilane), covalently bonded to different types of mesoporous silica hosts (namely MCM-41, MCM-48 and SBA-15), were prepared via both the methods of grafting post-synthesis (GPS) and one-pot synthesis (OPS). The products obtained, which form the GPS [(GPS)(Zn/MCM-41), (GPS)(Zn/MCM-48), (GPS)(Zn/SBA-15)] and the OPS [(OPS)(Zn/MCM-41), (OPS)(Zn/MCM-48), (OPS)(Zn/SBA-15)] series, contain the ZnL2 guest covalently bonded to the silica framework through silicon–oxygen bonds formed when the silane group is placed at the periphery of the Zn(II) coordination sphere. GPS and OPS materials were characterized by powder X-ray diffraction, N2 adsorption/desorption, thermogravimetric analysis (TGA) and UV/vis spectroscopy. For the new mesoporous materials the emission quantum yield (EQY) was measured by means of an integrating sphere combined with a spectrofluorimeter. The ZnL2 loading (measured by the ZnL2/SiO2 ratio calculated from TGA data) for MCM-41 appears to be independent of the synthesis procedure, whereas, for both MCM-48 and SBA-15, the ZnL2/SiO2 ratio of the materials obtained via OPS is about four times higher than products obtained from GPS. The ZnL2 loaded GPS and OPS series show λem maxima at about 485 and 455 nm, respectively. Moreover, with reference to EQY (GPS)(Zn/SBA-15) and (OPS)(Zn/SBA-15), although featuring ZnL2/SiO2 ratios of 0.13 and 0.45, respectively, they showed similar EQY values: 2% and 5%. On the contrary, (GPS)(Zn/MCM-41) and (OPS)(Zn/MCM-41) which give similar ZnL2/SiO2 ratios (0.09 and 0.14) exhibit very different EQY, i.e. 2% and 22%, respectively. 相似文献
78.
Ferrer Alexis Byers Floyd M. Sulbarán-de-Ferrer Betzabé Dale Bruce E. Aiello Cateryna 《Applied biochemistry and biotechnology》2000,84(1-9):163-179
An ammonia pressurization/depressurization process was investigated to evaluate the potential of producing reducing sugars
from dwarf elephant grass, a warm-season forage. Moisture, temperature, and ammonia loading affected sugar yield (p<0.0001). At optimal conditions, ammonia processing solubilized 50.9% of the hemicellulose and raised the sugar yield (percentage
of theoretical) from 18 to 83%. Glucose and xylose production were increased 3.2-and 8.2-fold, respectively. The mild processing
conditions of the ammonia treatment (90–100°C, 5 min), the low enzyme loading (2 international filter paper units/g), and
the short hydrolysis time (24 h), greatly enhance the potential of using for ages to produce sugars valuable for several applications. 相似文献
79.
80.
Crispini A Aiello I La Deda M De Franco I Amati M Lelj F Ghedini M 《Dalton transactions (Cambridge, England : 2003)》2006,(43):5124-5134
This paper reports the synthesis, characterization, photophysical and structural properties of the homologous series of good emitting pentacoordinated GaQ'2L complexes 1-3, where Q' is 2-methyl-quinolin-8-olate and L is a phenolate substituted in para position with respect to the oxygen donor atom. A combined approach between the experimental structural analysis (i.e. the molecular fragments involved in intermolecular pi-pi interactions) and the computational study (i.e. the nature of the molecular orbitals residing therein) is discussed in order to compare the charge transport aptitude of complexes 1-3, in relation to the facing of their LUMO/LUMO, HOMO/HOMO and HOMO/LUMO arising from the molecular packing. The different phenolate ligands significantly change the packing characteristics of 1-3, with indirect effects on the electron hopping kinetics responsible for conduction in amorphous thin films. The observed preference for pyridyl-pyridyl stacking proves a faster electron conduction in comparison to hole conduction in the three complexes studied. 相似文献