Vessels Classification in Retinal Images by Graph-Based Approach

The classification of retinal vessels into artery/vein (A/V) is an important phase for automating the detection of vascular changes. This paper presents an automatic approach for A/V classification based on the analysis of a graph extracted from the retinal vasculature. Classifier classifies the entire vascular tree deciding on the type of each intersection point (graph nodes) and assigning one of two labels to each vessel segment (graph links). Final classification of a vessel segment as A/V is performed through the combination of the graph-based labeling results with a set of intensity features. Our method out performs recent approaches for A/V classification. Normal retinal images vessels are segmented using the morphological operations and then using graph trace algorithm for identification the center line of the vessels and trace the pixel values as a feature and use the KNN classifier to classify the feature and assign which is the artery and which is the vein in retinal image. From features we extract the thickness of the vessels to identify the disease details. DOI: 10.17762/ijritcc2321-8169.150316

DESIGN OF A QUEUEING MODEL FOR ANALYSISING THE BEHAVIOUR OF POWER TRANSMISSION SYSTEM

ABSTRACT This paper deals with the Difference Queueing model for the power transmission system. The device called "Thyristor" which consists of three terminals modeled with queues

Simple ruthenium-catalyzed reductive amination enables the synthesis of a broad range of primary amines

The production of primary benzylic and aliphatic amines, which represent essential feedstocks and key intermediates for valuable chemicals, life science molecules and materials, is of central importance. Here, we report the synthesis of this class of amines starting from carbonyl compounds and ammonia by Ru-catalyzed reductive amination using H2. Key to success for this synthesis is the use of a simple RuCl2(PPh3)3 catalyst that empowers the synthesis of >90 various linear and branched benzylic, heterocyclic, and aliphatic amines under industrially viable and scalable conditions. Applying this catalyst, −NH2 moiety has been introduced in functionalized and structurally diverse compounds, steroid derivatives and pharmaceuticals. Noteworthy, the synthetic utility of this Ru-catalyzed amination protocol has been demonstrated by upscaling the reactions up to 10 gram-scale syntheses. Furthermore, in situ NMR studies were performed for the identification of active catalytic species. Based on these studies a mechanism for Ru-catalyzed reductive amination is proposed

An analysis of the stochastic behaviour for shift conversion system

This paper deals with the analysis of the stochastic behaviour and maintenance planning of shift conversion system with four subsystems A, B, C, D with possible states good and failure. Kumar and Pandey have discussed the process design for crystallisation system along with the maintenance planning and resource allocation. Subsequently, Kumar et al. have discussed about the steady state behaviour, maintenance planning along with the probabilistic analysis of desulphurisation system. Based on the Markov graph, differential equations are derived and the shift conversion system is analysed. The steady states of repair in each subsystem are obtained for the improvement in the process design which results to minimum failure. [Received on 11 January 2007; Revised 26 April 2007; Accepted 24 July 2007]shift conversion; failure rate; repair rate; Markov graph; availability; desulphurisation system; stochastic behaviour; maintenance planning.