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Dimensional reduction steps

Tellurium and cadmium Electrodeposition of Te has been reported [33] in basic chloroaluminates the element is formed from the [TeCl ] complex in one four-electron reduction step, furthermore, metallic Te can be reduced to Te species. Electrodeposition of the element on glassy carbon involves three-dimensional nucleation. A systematic study of the electrodeposition in different ionic liquids would be of interest because - as with InSb - a defined codeposition with cadmium could produce the direct semiconductor CdTe. Although this semiconductor can be deposited from aqueous solutions in a layer-by-layer process [34], variation of the temperature over a wide range would be interesting since the grain sizes and the kinetics of the reaction would be influenced. [Pg.301]

The process for film formation using a dimensional reduction approach requires three conceptually simple steps (Fig. 3.2). The first step involves... [Pg.80]

Figure 3.2. Film formation using a dimensional reduction approach involves three steps 1) breaking up the insoluble extended inorganic framework (a) into more soluble-isolated anionic species, which are separated by some small and volatile cationic species (b). 2) Solution-processing thin films of the precursor (b). 3) Heating the precursor films such that the cationic species and corresponding chalcogen anions are dissociated, leaving behind the targeted inorganic semiconductor (c). Figure 3.2. Film formation using a dimensional reduction approach involves three steps 1) breaking up the insoluble extended inorganic framework (a) into more soluble-isolated anionic species, which are separated by some small and volatile cationic species (b). 2) Solution-processing thin films of the precursor (b). 3) Heating the precursor films such that the cationic species and corresponding chalcogen anions are dissociated, leaving behind the targeted inorganic semiconductor (c).
Fig. 11.14. Comparison between measured TPR patterns for Fe2C>3 and calculated TPR peaks for Fe304 —>Fe metal reduction step, using the three-dimensional nucleation model according to Avrami-Erofeev at 0.2 K/min. Calculated dotted line (a) dry series, (b) wet series, E = 172... Fig. 11.14. Comparison between measured TPR patterns for Fe2C>3 and calculated TPR peaks for Fe304 —>Fe metal reduction step, using the three-dimensional nucleation model according to Avrami-Erofeev at 0.2 K/min. Calculated dotted line (a) dry series, (b) wet series, E = 172...
As alluded to at the begiiming of Section 3.3, probably the most challenging task is predicting, a priori, the extended structure - not only the coordination preferences of all the atoms or ions, but the polyhedra connectivity as well. In this area, Tulsky and Long have taken a major step forward by formalizing the application of dimensional reduction to treat the formation of ternary phases from binary solids (Tulsky and Long, 2001) ... [Pg.166]

It is worth mentioning that visualization is an important step. It helps analyzing the raw data to identify an eventual pattern and understand the behavior. The responses of the 16 array sensor when exposed to the three gases and ten concentrations have been visualized and investigated. The end of each concentration is chosen as the feature that represents a given gas at a specific concentration, it is called the steady state. The steady states, as shown in Figure 3 are extracted manually and used as features for the dimensionality reduction and classification. [Pg.216]

The full actuation model is represented by G s)H s). Since H s) involves non-rational functions, such as sinh(-), cosh(-), and a/, it is infinitedimensional. For practical implementation of feedback control design, however, finite-dimensional models are desirable. Simple model reduction steps can be taken to obtain finite-dimensional models for IPMC actuators, by exploiting the knowledge of physical parameters and specific properties of hyperboiic functions. In particular, based on the physical parameters of IPMCs (see Section 4.2.3), 7(s) 10, and K 10 , and we can make... [Pg.99]

Results that are likely to be true positive still need to be interpreted (Breitling 2006 Sotiriou and Piccart 2007). This is the expression-profiling step and involves dimensionality reduction of the large number of posi-... [Pg.304]

The de novo biosynthesis of fatty acids in plants occurs in the plastid and is cataiysed by a type II, dissociable fatty acid synthetase(FAS). Enoyl-ACP reductase (ER) catalyses the second reductive step in the synthetic cycle, converting a trans 2,3 moiety into a saturated acyl chain. The protein from B. napus has been purified[1], extensively sequenced[2] and the absolute mass of the enzyme in developing rape seed determined[3]. The cDNA which encodes ER has been cloned and fully sequenced Southern hybrisization with this cDNA shows the presence of four genes in B. napu A]. This study investigates the expression of ER mRNA and the steady-state levels of ER protein isoforms by Northern and two-dimensional Western analyses. [Pg.90]

Estimating the intrinsic dimensionality of a dataset is an important pre-processing step for spectral dimensionality reduction as embedding the dataset into its non-intrinsic dimensionality can lead to suboptimal performance of any subsequent algorithms [2]. As such, the area of intrinsic dimensionality estimation has attracted much attention over the years, especially since the advent of nonlinear spectral dimensionality reduction techniques. [Pg.42]

The first finite element schemes for differential viscoelastic models that yielded numerically stable results for non-zero Weissenberg numbers appeared less than two decades ago. These schemes were later improved and shown that for some benchmark viscoelastic problems, such as flow through a two-dimensional section with an abrupt contraction (usually a width reduction of four to one), they can generate simulations that were qualitatively comparable with the experimental evidence. A notable example was the coupled scheme developed by Marchal and Crochet (1987) for the solution of Maxwell and Oldroyd constitutive equations. To achieve stability they used element subdivision for the stress approximations and applied inconsistent streamline upwinding to the stress terms in the discretized equations. In another attempt, Luo and Tanner (1989) developed a typical decoupled scheme that started with the solution of the constitutive equation for a fixed-flow field (e.g. obtained by initially assuming non-elastic fluid behaviour). The extra stress found at this step was subsequently inserted into the equation of motion as a pseudo-body force and the flow field was updated. These authors also used inconsistent streamline upwinding to maintain the stability of the scheme. [Pg.81]

The oxidation or reduction of a substrate suffering from sluggish electron transfer kinetics at the electrode surface is mediated by a redox system that can exchange electrons rapidly with the electrode and the substrate. The situation is clear when the half-wave potential of the mediator is equal to or more positive than that of the substrate (for oxidations, and vice versa for reductions). The mediated reaction path is favored over direct electrochemistry of the substrate at the electrode because, by the diffusion/reaction layer of the redox mediator, the electron transfer step takes place in a three-dimensional reaction zone rather than at the surface Mediation can also occur when the half-wave potential of the mediator is on the thermodynamically less favorable side, in cases where the redox equilibrium between mediator and substrate is disturbed by an irreversible follow-up reaction of the latter. The requirement of sufficiently fast electron transfer reactions of the mediator is usually fulfilled by such revemible redox couples PjQ in which bond and solvate... [Pg.61]


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