Bortik Bandyopadhyay

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A method for achieving sliding mode in uncertain systems is presented in this paper. The algorithm uses a fast output sampling control strategy that would avoid the use of switching in the control input and hence avoids chattering. This method does not need the measurement of the system states for feedback as it makes use of only the output samples for(More)
In this paper a new approach is presented for discrete time sliding mode control based on multi-rate output samples. It will be shown here if the outputs of the system are some of the states only or system is in a special form, multi-rate observer i.e the state of the system can be obtained by the matrix inverse of lower dimension than the existing(More)
We propose a novel, scalable, and principled graph sketching technique based on minwise hashing of local neighborhood. For an n-node graph with <i>e</i>-edges (<i>e</i> &gt;&gt; <i>n</i>), we incrementally maintain in real-time a minwise neighbor sampled subgraph using <i>k</i> hash functions in <i>O</i>(<i>n</i> x <i>k</i>) memory, limit being(More)
The paper presents an algorithm for the discretetime output feedback sliding mode control of time delayed systems with uncertainty. The proposed algorithm is capable of handling systems with both state and input delay. The major advantage of the algorithm is that it is based on system output and hence more practical. Moreover, it reduces chattering by(More)
Social media applications have assumed an important role in decision-making process of users, affecting their choices about products and services. In this context, understanding and modeling opinions, as well as opinion-leaders, have implications for several tasks, such as recommendation, advertising, brand evaluation etc. Despite the intrinsic relation(More)
Steganography is the art and science of writing hidden messages such that the existence of a secret communication is known only to the sender and receiver. For hiding messages different types of media are used. Audio steganography uses audio as the cover media. Commonly used techniques for audio steganography are temporal domain and transform domain(More)
The burden of Japanese encephalitis (JE) is still very high despite better vaccine coverage (Campbell et al., 2011). JE is now endemic in 24 Asian and Oceanian countries with an estimated 67,900 JE cases occurring annually (Campbell et al., 2011) with about 3 billion population is at risk. JE virus belong to the genus Flavivirus under the family(More)
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