Browsing by Author "Suri, M."

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Exploiting analogue OxRAM conductance modulation for contrast enhancement application
(2020-06-11)
Kumar, A.
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Bezugam, S. S.
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Hudec, B.
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Hou, T. -H.
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Suri, M.
The authors present a unique application of analogue oxide-based resistive memory (OxRAM) device for sensor-level information storage and computation. They show that quality of low-contrast images in low-light can be improved by carefully exploiting OxRAM conductance modulation from specific bi-layer OxRAM material stacks. The proposed methodology involves conversion of light intensity to pulse frequency followed by resistance encoding as different non-volatile OxRAM resistance states.
THE STATISTICAL DICTIONARY-BASED STRING MATCHING PROBLEM
(2019-01-01)
Suri, M.
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Rini, S.
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電機工程學系
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Department of Electrical and Computer Engineering
In the Dictionary-based String Matching (DSM) problem, an Information Retrieval (IR) system has access to a source sequence and stores the position of a certain number of strings in a posting table. When a user inquires the position of a string, the IR system, instead of searching in the source sequence directly, relies on the the posting table to answer the query more efficiently. In this paper, the Statistical DSM problem is proposed as a statistical and information-theoretic formulation of the classic DSM problem in which both the source and the query have a statistical description while the strings stored in the posting sequence are described as a code. Through this formulation, we define the communication efficiency of the IR system as the average cost in retrieving the entries of the posting list from the posting table, in the limit of an infinitely long source sequence. This formulation is used to study the communication efficiency for the case in which the dictionary is composed of (i) all the strings of a given length, referred to as k-grams , and (ii) run-length codes.