Indian Institute of Technology Ropar

About: Indian Institute of Technology Ropar is a education organization based out in Ropar, India. It is known for research contribution in the topics: Catalysis & Computer science. The organization has 1014 authors who have published 2878 publications receiving 35715 citations.

Visible-Light-Driven Selective Oxidation of Biomass-Derived HMF to DFF Coupled with H2 Generation by Noble Metal-Free Zn0.5Cd0.5S/MnO2 Heterostructures

Abstract: The development of efficient photocatalysts for utilization of solar energy for water splitting coupled with oxidation of biomass-derivatives is of utmost importance for the simultaneous production...

Simultaneous optimization of performance parameters and energy consumption in induced draft cooling towers

Abstract: In the present work, a model based on experiments is presented to simultaneously optimize all possible performance parameters as well as to ensure minimum energy consumption from an induced draft cooling tower operating under a given set of conditions. Empirical correlations are obtained for performance parameters such as range, approach, tower characteristic ratio, effectiveness and evaporation rate against air and water flow rates, which in turn are selected as discrete objective functions to formulate a multi-objective optimization problem. Unlike previous studies which neglected the simultaneous consideration of five performance parameters aimed at minimum possible power consumption, here an unconstrained optimization of all objective functions is carried out using elitist Non-dominated Sorting Genetic Algorithm (NSGA-II). Considering five performance parameters, the air flow rate has been estimated under a given water flow rate using a Decision Making Matrix-based criterion. Among various performance parameters, the maximization of the range for diverse water flow rates implicitly satisfies different loads imposed on the cooling tower, thereby avoiding the necessity of formulating an additional constraint. Furthermore, due to maximization of the approach and minimization of the evaporation rate, minimum operating cost is ensured from the induced draft cooling tower.

SeeR: Simulated Annealing-Based Routing in Opportunistic Mobile Networks

Abstract: Opportunistic Mobile Networks (OMNs) are characterized by intermittent connectivity among nodes. In many scenarios, the nodes attempt at local decision making based on greedy approaches, which can result in getting trapped at local optimum. Moreover, for efficient routing, the nodes often collect and exchange a lot of information about others. To alleviate such issues, we present SeeR, a simulated annealing-based routing protocol for OMNs. In SeeR, each message is associated with a cost function, which is evaluated by considering its current hop-count and the average aggregated inter-contact time of the node. A node replicates a message to another node, when the latter offers a lower cost. Otherwise, the message is replicated with decreasing probability. Moreover, SeeR works based solely upon local observations. In particular, a node does not track information about other nodes, and, therefore, reduces the risk of privacy leaks unlike many other protocols. We evaluated the performance of SeeR by considering several real-life traces under plausible conditions. Experimental results show that, in the best case, SeeR can reduce the average message delivery latency by about 58 percent, when compared to other popular routing protocols.