Papers by Amit kumar Singh
2011 Fourth International Symposium on Parallel Architectures, Algorithms and Programming, 2011
Real-time multi-media applications are increasingly mapped on modern embedded systems based on Mu... more Real-time multi-media applications are increasingly mapped on modern embedded systems based on Multiprocessor Systems-on-Chip (MPSoCs). Tasks of the applications need to be mapped on the MPSoC resources efficiently in order to satisfy their performance constraints. Exploring all the mappings, i.e. tasks to resources combinations exhaustively may take days or weeks. Additionally, the exploration is performed at design-time that cannot handle dynamism in applications and resources' status. A run-time mapping technique can cater for the dynamism but cannot guarantee for strict timing deadlines due to large computations involved at run-time. Thus, an approach performing feasible compute intensive exploration at design-time and using the explored results at run-time is required. This paper presents a solution in the same direction. Communicationaware design space exploration techniques have been proposed to explore different mapping options to be selected at run-time subject to desired performance and available MPSoC resources. Experiments show that the proposed techniques for exploration are faster over an exhaustive exploration and provides almost the same quality of results.
2011 IEEE Computer Society Annual Symposium on VLSI, 2011
System designers need to perform design-space exploration (DSE) to find appropriate number and ty... more System designers need to perform design-space exploration (DSE) to find appropriate number and type of processing elements (PEs) to be present in a Multiprocessor Systems-on-Chip (MPSoC) to support a throughput-constrained application. This paper presents a DSE methodology that provides application to MPSoC architecture mappings, where different PEs get used. The methodology starts from a mapping using only one type of processors and evaluates different mappings by increasing heterogeneity to improve the performance.
International Journal of Computer Aided Engineering and Technology, 2009
In this paper, a methodology has been presented to optimise the process parameters for selective ... more In this paper, a methodology has been presented to optimise the process parameters for selective laser sintering (SLS) process using the finite element method (FEM) based simulation and design of experiments (DOE). A systematic DOE was performed using 2 3 full factorial designs to first establish the different simulation experiments that were needed to be carried out. The simulation experiments were then implemented in the Ansys ® ' APDL™ environment to determine the evolution temperature distribution and density variation with time in the SLS of bisphenol-A polycarbonate. The results of the simulation in terms of the average density were regressed and subjected to ANOVA to identify the important process parameters affecting the final density of the laser sintered part and the relationship between them. DesignEase ® software was used to analyse the designed experiments. Laser power and scan spacing were found to be significant parameters affecting the part density. Amongst the interaction terms, significant effect of laser power was found on the part density at the lower settings of the scan velocity. At the higher setting of scan velocity the density was almost constant.
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Papers by Amit kumar Singh