773 research outputs found
Fabrication and Characterization of CIS/CdS and Cu2S/CdS Devices for Applications in Nano Structured Solar Cells
Nano structured solar cells provide an opportunity for increased open circuit voltages and and short circuit currents in solar cells due to quantum confinement of the window and absorber materials and an increase in the optical path length for the incident light. In this study, both bulk and nano heterojunctions of CIS/CdS and Cu2S/CdS devices have been fabricated and studied on plain glass substrates and inside porous alumina templates to compare their performance. The devices have also been characterized SEM, XRD and JV measurements. The J-V curves have also been analyzed for series resistance, diode ideality factor and reverse saturation current density
Deep Multiple Kernel Learning
Deep learning methods have predominantly been applied to large artificial
neural networks. Despite their state-of-the-art performance, these large
networks typically do not generalize well to datasets with limited sample
sizes. In this paper, we take a different approach by learning multiple layers
of kernels. We combine kernels at each layer and then optimize over an estimate
of the support vector machine leave-one-out error rather than the dual
objective function. Our experiments on a variety of datasets show that each
layer successively increases performance with only a few base kernels.Comment: 4 pages, 1 figure, 1 table, conference pape
Some results on a graph associated with a non-quasi-local atomic domain
Let R be an atomic domain which admits at least two maximal ideals. Let Irr(R) denote the set of all irreducible elements of R and let A(R) = {Rπ | π ∈ Irr(R)}. Let I(R) denote the subset of A(R) consisting of all Rπ ∈ A(R) such that π does not belong to the Jacobson radical of R. With R, we associate an undirected graph denoted by G(R) whose vertex set is I(R) and distinct vertices Rπ1 and Rπ2 are adjacent if and only if Rπ1 ∩ Rπ2 = Rπ1π2. The aim of this article is to discuss some results on the connectedness of G(R) and on the girth of G(R)
Some results on the comaximal ideal graph of a commutative ring
The rings considered in this article are commutative with identity which admit at least two maximal ideals. Let be a ring such that admits at least two maximal ideals. Recall from Ye and Wu (J. Algebra Appl. 11(6): 1250114, 2012) that the comaximal ideal graph of , denoted by is an undirected simple graph whose vertex set is the set of all proper ideals of such that , where is the Jacobson radical of and distinct vertices , are joined by an edge in if and only if . In Section 2 of this article, we classify rings such that is planar. In Section 3 of this article, we classify rings such that is a split graph. In Section 4 of this article, we classify rings such that is complemented and moreover, we determine the -vertices of
When is the annihilating ideal graph of a zero-dimensional quasisemilocal commutative ring complemented?
AbstractLet R be a commutative ring with identity. Let A(R) denote the collection of all annihilating ideals of R (that is, A(R) is the collection of all ideals I of R which admits a nonzero annihilator in R). Let AG(R) denote the annihilating ideal graph of R. In this article, necessary and sufficient conditions are determined in order that AG(R) is complemented under the assumption that R is a zero-dimensional quasisemilocal ring which admits at least two nonzero annihilating ideals and as a corollary we determine finite rings R such that AG(R) is complemented under the assumption that A(R) contains at least two nonzero ideals
The exact annihilating-ideal graph of a commutative ring
The rings considered in this article are commutative with identity. For an ideal of a ring , we denote the annihilator of in by . An ideal of a ring is said to be an exact annihilating ideal if there exists a non-zero ideal of such that and . For a ring , we denote the set of all exact annihilating ideals of by and by . Let be a ring such that . With , in [Exact Annihilating-ideal graph of commutative rings, {\it J. Algebra and Related Topics} {\bf 5}(1) (2017) 27-33] P.T. Lalchandani introduced and investigated an undirected graph called the exact annihilating-ideal graph of , denoted by whose vertex set is and distinct vertices and are adjacent if and only if and . In this article, we continue the study of the exact annihilating-ideal graph of a ring. In Section 2 , we prove some basic properties of exact annihilating ideals of a commutative ring and we provide several examples. In Section 3, we determine the structure of , where either is a special principal ideal ring or is a reduced ring which admits only a finite number of minimal prime ideals
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