منابع مشابه
Decimal/rf_.sidue/decimal Optical Converters
Residue arithmetic [1-3] appears to be an attractive scheme for realizing a high speed numerical processor. Huang [4,5 ] was one of the first to suggest fabrication of an optical residue arithmetic processor. One recent optical approach [6] to such a system uses ~he phase or polarization of a spatial point as the cyclic variable. Another approach [7] uses pulse-position modulation to represent ...
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To make error correcting codes easier to use and analyze, it is necessary to impose some algebraic structure on them. It is especially useful to have an alphabet in which it is possible to add, subtract, multiply and divide without restriction. In other words we wish to construct a finite field. Evarist Galois (1811-32), a French mathematician who died in a duel at the age of 20 introduced fini...
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This note discusses the main issues in performing correctly rounded decimal-to-binary and binary-to-decimal conversions. It reviews recent work by Clinger and by Steele and White on these conversions and describes some efficiency enhancements. Computational experience with several kinds of arithmetic suggests that the average computational cost for correct rounding can be small for typical conv...
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A decimal sequence is obtained when a number is represented in a decimal form in a base r and it may terminate, repeat or be aperiodic. For a certain class of decimal sequences of q 1 , prime, the digits spaced half a period apart add up to q 1 − r , where r is the base in which the sequence is expressed. Decimal sequences are known to have good crossand auto-correlation properties and they can...
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This paper introduces the use of decimal sequences in a code division multiple access (CDMA) based watermarking system to hide information for authentication in black and white images. Matlab version 6.5 was used to implement the algorithms discussed in this paper. The advantage of using d-sequences over PN sequences is that one can choose from a variety of prime numbers which provides a more f...
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ژورنال
عنوان ژورنال: Nature
سال: 1970
ISSN: 0028-0836,1476-4687
DOI: 10.1038/228589d0