1,721,009 research outputs found
Solid-State NMR Characterization of the Insertion of Cobalt into Aluminosilicate Materials
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The 500 °C Isothermal Section of the Al-Fe-Pr Ternary System
No full textPhases and equilibria involved in the isothermal section at 500 degrees C of the ternary Al-Fe-Pr system have been here investigated in the whole composition range by means of X-ray diffraction, optical and scanning electron microscopy, and electron probe microanalysis. Phase equilibria are characterised by the formation of two binary solid solutions, Pr2(FexAl1-x)17 with 0.34 <= x <= 1.00 (hR57-Th2Zn17) and Pr(FexAl1-x)2 with 0 <= x <= 0.20 (cF24-Cu2Mg), and four ternary compounds, tau 1-PrFe2Al10 (oS52-YbFe2Al10), tau 2-PrFe2Al8 (oP44-CeFe2Al8), tau 3-Pr(FexAl1-x)12 with 0.28 <= x <= 0.44 (tI26-ThMn12) and tau 4-Pr6(FexAl1-x)14 with 0.63 <= x <= 0.81 (tI80-La6Co11Ga3), which have been confirmed. The solid solubility ranges of the binary and ternary compounds have been considered and trends of their lattice parameters studied. The complete isothermal section has been obtained and the general features of the section are discussed and compared with those of other ternary systems of light R (La, Ce, Pr, Nd, Sm) with Al and Fe
Decision Predicate Graphs: Enhancing Interpretability in Tree Ensembles
No full textUnderstanding the decisions of tree-based ensembles and their relationships is pivotal for machine learning model interpretation. Recent attempts to mitigate the human-in-the-loop interpretation challenge have explored the extraction of the decision structure underlying the model taking advantage of graph simplification and path emphasis. However, while these efforts enhance the visualisation experience, they may either result in a visually complex representation or compromise the interpretability of the original ensemble model. In addressing this challenge, especially in complex scenarios, we introduce the Decision Predicate Graph (DPG) as a model-specific tool to provide a global interpretation of the model. DPG is a graph structure that captures the tree-based ensemble model and learned dataset details, preserving the relations among features, logical decisions, and predictions towards emphasising insightful points. Leveraging well-known graph theory concepts, such as the notions of centrality and community, DPG offers additional quantitative insights into the model, complementing visualisation techniques, expanding the problem space descriptions, and offering diverse possibilities for extensions. Empirical experiments demonstrate the potential of DPG in addressing traditional benchmarks and complex classification scenarios
The 500 °C Isothermal Section of the Al-Co-Nd Ternary System
No full textThe Al-Co-Nd isothermal section at 500 degrees C has been investigated in the whole composition range by means of x-ray diffraction, optical and scanning electron microscopy and electron probe microanalysis. The following ternary phases have been identified or confirmed: tau(1)-Nd4CoAl (cF96-Gd4RhIn), tau(2)-NdCo2Al8 (oP44-CeFe2Al8), tau(3)-NdCo3Al11 (unknown), tau(4)-Nd2Co3Al9 (oS56-Y2Co3Ga9) tau(5)-Nd5Co2Al2 (unknown), tau(6)-Nd2Co6Al19 (mS108 U2Co6Al19), tau(7)-Nd7Co6Al7 (tP40-Pr7Co6Al7), tau(8)-Nd2Co2Al (oI10-W2CoB2), tau(9)-Nd13Co14-xAl4+x (0 <= x <= 0.7, oS28-W3CoB3). The complex system of phase equilibria linking the large number of binary and ternary Al-Co-Nd phases at 500 degrees C has been completely determined. The general characteristics of the section have been discussed in comparison with those of other Al-Co-R systems
Technologies for the removal of phenol from fluid streams: a short review of recent developments
No full textThe available technologies for the abatement of phenol from water and gaseous streams are briefly reviewed, and the recent advancements summarized. Separation technologies such as distillation, liquid–liquid extraction with different solvents, adsorption over activated carbons and polymeric and inorganic adsorbents, membrane pervaporation and membrane–solvent extraction, have been discussed.
Destruction technologies such as non-catalytic, supercritical and catalytic wet air oxidation, ozonation, non-catalytic, catalytic and enzymatic peroxide wet oxidation, electrochemical and photocatalytic oxidation, supercriticalwet gasification, destruction with electron discharges aswell as biochemical treatments have been considered. As for the abatement of phenol from gases, condensation, absorption in liquids, adsorption on solids, membrane separation, thermal, catalytic, photocatalytic and biological oxidation have also been considered. The experimental conditions and the performances of the different techniques have been compared
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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