In this paper, we present a fast algorithm to answer rangesum queries in OLAP data cubes. Our algorithm supports constanttime queries while maintaining sub-linear time update and using minimum space. Furthermore, we study the trade-off between query time and update time. The complexity for query is O(2) and for updates O((2 2 l √ n)) on a data cube of n elements, where l is a trade-off paramete...

The article analyses a auto-tuning method for a fuzzy PID controller based on the relay experiment. The algorithm was implemented and tested on a real plant for redox agent stabilisation in a paper mill. Experiments have discovered some unsolved, practical problems which were discussed in the paper i.e. determination of the ON-OFF parameters, the non-shocked switching from the ON-OFF tuning alg...

In this paper, off-grid DOA estimation based on sparse representation and Rife algorithm is presented to improve performance when the sparse signal directions are not on the predefined angular grids. The algorithm is divided into two steps. Firstly, the real-valued sparse representation of array covariance vector (RV-SRACV) algorithm is used to do off-grid DOA estimation, and it does not need t...

1. Abstract. This article presents a fast dense solver for hierarchically off-diagonal low-rank (HODLR) matrices. This solver uses algebraic techniques such as the adaptive cross approximation (ACA) algorithm to construct the low-rank approximation of the off-diagonal matrix blocks. This allows us to apply the solver to any dense matrix that has an off-diagonal low-rank structure without any pr...