Heritage Institute of Technology

About: Heritage Institute of Technology is a based out in . It is known for research contribution in the topics: Steganography & Support vector machine. The organization has 581 authors who have published 1045 publications receiving 8345 citations.

Palladium-Catalyzed Cascade Reactions for Annulative π -Extension of Indoles to Carbazoles through C–H Bond Activation

Abstract: The annulative π-extension (APEX) reactions through C-H bond activation has tremendous potential to access fused aromatic systems from relatively simple aromatic compounds in a single step. This state-of-the-art technique has the ability to streamline the synthesis of functionalized materials useful in material science, biomedical research, agroand pharmaceutical industries. Furthermore, C-H activation strategy does not require prefunctionalization steps, which allows for the late-stage modification of the functional molecule with requisite molecular properties. Owing to their unique photophysical properties, carbazoles are widely used in photovoltaic cells, biomedical imaging, fluorescent polymer, etc. It is also ubiquitously found in many natural products, agrochemicals and privileged medicinal scaffolds. Hence, direct conversion of easily accessible indole to carbazole remains an active research area. In the last decades, significant advancement has been made to access carbazole moiety directly from indole through cascade C-H activation. The underlying mechanism behind this cascade π-extension strategy is the facile electrophilic metalation at the C-3 position of the indole moiety, 1,2- migration and electro cyclization. In this review, we will discuss recent literature reports for the palladium-catalyzed π-extension of indole to carbazole moiety through C-H bond activation.

Hybrid advanced player selection strategy based population search for global optimization

Abstract: Motivation: Finding the optimum solution of real world complex optimization problem needs efficient solver system. Meta-heuristic like swarm, evolutionary or physics based methods essentially form an expert system which may strive for the search of optimum solution. However, these methods have their own merits and demerits. To supersede the performance of existing systems in context of real time and advanced problems and to propose new intelligent method having an optimal balance between exploration and exploitation phase have become a center of focus of the expert system design. Therefore, being inspired from such a scenario, a hybrid advanced player selection strategy based population search (HAPS-PS) technique is proposed and evaluated in this paper in context of modern applications. Methods: Sport is a multi-functional activity where different learning methods like cooperative, competitive and self-learning variants along with interactive environmental features help to improve the performance of the players. The properties of playing activity and the thematic learning process of sports, along with some features like, chaotic map based initialization, pool based topological structure selection, integration of blended laplacian operator etc. contributes in the design of HAPS-PS. Also a novel mechanism of team reformation through elimination of comparatively poor players and recruitment of new talents is employed. It provides diversification and regulates the search agents in a promising direction. Results: We have comprehensively evaluated the performance of the HAPS-PS by applying it on standard benchmark problems and on various shifted rotated, hybrid and composite problems of CEC2013 and CEC2014. Also some of the competitive problems of CEC 2017 are tested using the proposed method and they are also compared with other state-of-the-art algorithm to validate the efficacy of the system. Further, tests are carried out on some real-world problems from CEC2011 which includes applications related to parameter optimization of frequency-modulated (FM) sound wave, minimization of molecular potential energy of Lennard-Jones cluster, controlling the chemical reactors, and evaluation of the inter atomic tersoff potentials for covalent systems of silicon. The proposed method is also applied on spread spectrum radar polyphase code design problem as a part of real world application. The comparative results validate the effectiveness and efficiency of HAPS-PS.

Large Amplitude Free Vibration of a Rotating Nonhomogeneous Beam With Nonlinear Spring and Mass System

Abstract: This paper investigates the free out of plane vibration of a rotating nonhomogeneous beam with nonlinear spring and mass system. The effect of nonhomogeneity of the beam appears both in the governing equations and in the boundary conditions, but the nonlinear spring-mass effect appears in the boundary conditions only. The solution is obtained by applying the method of multiple time scales directly to the nonlinear partial differential equations and the boundary conditions. The results of the linear frequencies match well with those obtained in open literature. The effect of the nonhomogeneity of the stiffer beam (β=0.01) reduces the frequencies of vibration of the beam. A possible physical explanation of this reduced frequency of the nonhomogeneous beam is discussed. A subsequent nonlinear study of the nonhomogeneous beam indicates that the mass of the spring and its location also have a pronounced effect on the vibration of the beam. The effect of the nonhomogeneity of the beam on the relative stability of the nonlinear vibration of the beam with spring-mass system is also studied.

A Multi-item Inventory Model with Fuzzy Rough Coefficients via Fuzzy Rough Expectation

Abstract: In this paper, we concentrated on developing a multi-item inventory model under fuzzy rough environment. Here, demand and holding cost rates are assumed as the functions of stock level. Fuzzy rough expectation method is used to transform the present fuzzy rough inventory model into its equivalent crisp model. A numerical example is provided to illustrate the proposed model. To show the validity of the proposed models, few sensitivity analyses are also presented under the major parameter, and the results are illustrated numerically and graphically.