• Title/Summary/Keyword: Localization of array elements

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Two-dimensional Localization of Array Elements Placed on a Sea Floor Using M-sequence Signal in Multipath Ocean Environment (M-계열 송신 신호를 이용한 다중 경로 해양 환경에서의 해저면 설치 선배열 센서의 2차원 위치 추정)

  • 오택환;나정열;석동우
    • The Journal of the Acoustical Society of Korea
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    • v.21 no.8
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    • pp.686-694
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    • 2002
  • This paper proposes an algorithm for estimating positions of array elements placed on a sea floor using acoustic signal in multipath ocean environment. The positions of array elements are estimated by using the travel times of m-sequence signal influenced by the multi-paths environment. The horizontal distance between source and receiver calculated based on the ray model. The proposed paper the algorithm is verified by both simulation data and field experiment in the Bast Sea.

Array Localization for Multithreaded Code Generation (다중스레드 코드 생성을 위한 배열 지역화)

  • Yang, Chang-Mo;Yu, Won-Hui
    • The Transactions of the Korea Information Processing Society
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    • v.3 no.6
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    • pp.1407-1417
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    • 1996
  • In recent researches on thread partitioning algorithms break a thread at the long latency operation and merge threads to get the longer threads under the given constraints. Due to this limitation, even a program with little parallelism is partitioned into small-sized threads and context-swithings occur frequently. In the paper, we propose another method array localization about the array name, dependence distance(the difference of accessed element index from loop index), and the element usage that indicates whether element is used or defined. Using this information we can allocate array elements to the node where the corresponding loop activation is executed. By array localization, remote accesses to array elements can be replaced with local accesses to localized array elements. As a resuit,the boundaries of some threads are removed, programs can be partitioned into the larger threads and the number of context switchings reduced.

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