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Journal articles on the topic 'Index permutés'

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Published: 25 May 2024

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1

Courrier, Yves. "L’indexation automatique : état de la question et perspectives d’avenir." Documentation et bibliothèques 23, no. 2 (January 9, 2019): 59–72. http://dx.doi.org/10.7202/1055247ar.

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Abstract:

L’auteur décrit d’abord le principe de l’édition automatique d’index, en particulier les index permutés et le système PRECIS, et souligne les tendances actuelles. Il expose ensuite les diverses méthodes utilisées pour extraire automatiquement les mots-clés : les méthodes statistiques et les méthodes linguistiques. Pour ces dernières, il explicite les méthodes syntaxiques et les méthodes sémantiques. Il montre enfin que la recherche en intelligence artificielle est pertinente pour l’indexation automatique mais qu’elle n’est pas encore assez développée pour apporter des résultats substantiels.

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2

Wang, Quanyv, Xiaoqiang Zhang, and Xiaohu Zhao. "Color image encryption algorithm based on bidirectional spiral transformation and DNA coding." Physica Scripta 98, no. 2 (January 24, 2023): 025211. http://dx.doi.org/10.1088/1402-4896/acb322.

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Abstract The security of digital images has become increasingly important as information technology has advanced considerably. To ensure image security and improve the efficiency of image encryption, a novel color image encryption algorithm is proposed in this paper. Firstly, a novel three-dimensional chaotic system with extreme multistability is proposed and employed to generate the chaotic sequences to be used in the permutation and diffusion processes. Secondly, the proposed bidirectional spiral transformation is used to permute the R, G and B components extracted from the color plain image. Thirdly, the permuted pixel sequence is dynamically encoded into a DNA sequence. To further increase the permutation effect, the DNA sequence is permuted again using the index sequence. Finally, the dynamical DNA operations are performed to diffuse the permuted DNA sequence, and the designed look-up table method is used to quickly obtain the DNA operation results. The key space of the proposed algorithm is 10266, which is large enough to resist the brute-force attacks. The average entropy value of the cipher image of Peppers is 7.9971, which is much closer to the theoretical entropy value 8. The dynamic DNA operations process only takes up 0.032349s, which shows the advantage of the proposed look-up table method. Therefore, the proposed algorithm can be applied to the application that require high confidentiality and real-time.

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3

"Permuted Title Index." Abstracts of Working Papers in Economics 1, no. 1 (March 1986): 113–34. http://dx.doi.org/10.1017/s0951007900000085.

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4

"Permuted Title Index." Abstracts of Working Papers in Economics 1, no. 2 (June 1986): 256–77. http://dx.doi.org/10.1017/s0951007900000176.

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5

"Permuted Title Index." Abstracts of Working Papers in Economics 1, no. 3 (September 1986): 387–407. http://dx.doi.org/10.1017/s0951007900000267.

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6

"Permuted Title Index." Abstracts of Working Papers in Economics 1, no. 4 (December 1986): 520–40. http://dx.doi.org/10.1017/s0951007900000358.

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7

"Permuted Title Index." Abstracts of Working Papers in Economics 2, no. 2 (June 1987): 251–74. http://dx.doi.org/10.1017/s0951007900000449.

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8

"Permuted Title Index." Abstracts of Working Papers in Economics 2, no. 1 (March 1987): 107–27. http://dx.doi.org/10.1017/s0951007900000516.

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9

"Permuted Title Index." Abstracts of Working Papers in Economics 2, no. 3 (September 1987): 393–413. http://dx.doi.org/10.1017/s0951007900000607.

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10

"Permuted Title Index." Abstracts of Working Papers in Economics 2, no. 4 (December 1987): 540–61. http://dx.doi.org/10.1017/s0951007900000681.

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11

"Permuted Title Index." Abstracts of Working Papers in Economics 3, no. 1 (March 1988): 122–44. http://dx.doi.org/10.1017/s0951007900000760.

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12

"Permuted Title Index." Abstracts of Working Papers in Economics 3, no. 2 (June 1988): 272–94. http://dx.doi.org/10.1017/s095100790000084x.

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13

"Permuted Title Index." Abstracts of Working Papers in Economics 3, no. 3 (September 1988): 417–38. http://dx.doi.org/10.1017/s0951007900000929.

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14

"Permuted Title Index." Abstracts of Working Papers in Economics 3, no. 4 (December 1988): 555–76. http://dx.doi.org/10.1017/s0951007900001005.

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15

"Permuted Title Index." Abstracts of Working Papers in Economics 4, no. 1 (March 1989): 114–35. http://dx.doi.org/10.1017/s095100790000108x.

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16

"Permuted Title Index." Abstracts of Working Papers in Economics 4, no. 2 (June 1989): 264–88. http://dx.doi.org/10.1017/s0951007900001169.

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17

"Permuted Title Index." Abstracts of Working Papers in Economics 4, no. 3 (September 1989): 406–30. http://dx.doi.org/10.1017/s0951007900001248.

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18

"Permuted Title Index." Abstracts of Working Papers in Economics 4, no. 4 (December 1989): 549–73. http://dx.doi.org/10.1017/s0951007900001327.

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19

"Permuted Title Index." Abstracts of Working Papers in Economics 5, no. 1 (March 1990): 119–43. http://dx.doi.org/10.1017/s0951007900001406.

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20

"Permuted Title Index." Abstracts of Working Papers in Economics 5, no. 2 (June 1990): 263–87. http://dx.doi.org/10.1017/s0951007900001480.

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21

"Permuted Title Index." Abstracts of Working Papers in Economics 5, no. 3 (September 1990): 406–30. http://dx.doi.org/10.1017/s095100790000156x.

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22

"Permuted Title Index." Abstracts of Working Papers in Economics 5, no. 4 (December 1990): 551–77. http://dx.doi.org/10.1017/s0951007900001649.

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23

"Permuted Title Index." Abstracts of Working Papers in Economics 6, no. 1 (March 1990): 108–31. http://dx.doi.org/10.1017/s0951007900001728.

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24

"Permuted Title Index." Abstracts of Working Papers in Economics 6, no. 2 (June 1990): 253–79. http://dx.doi.org/10.1017/s0951007900001807.

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25

"Permuted Title Index." Abstracts of Working Papers in Economics 6, no. 3 (September 1990): 401–26. http://dx.doi.org/10.1017/s0951007900001881.

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26

"Permuted Title Index." Abstracts of Working Papers in Economics 6, no. 4 (December 1990): 547–73. http://dx.doi.org/10.1017/s0951007900001960.

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27

"Permuted Title Index." Abstracts of Working Papers in Economics 7, no. 1 (March 1991): 118–44. http://dx.doi.org/10.1017/s0951007900002047.

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28

"Permuted Title Index." Abstracts of Working Papers in Economics 7, no. 2 (June 1991): 267–92. http://dx.doi.org/10.1017/s0951007900002126.

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29

"Permuted Title Index." Abstracts of Working Papers in Economics 7, no. 3 (September 1991): 412–37. http://dx.doi.org/10.1017/s0951007900002205.

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30

"Permuted Title Index." Abstracts of Working Papers in Economics 7, no. 4 (December 1991): 554–79. http://dx.doi.org/10.1017/s095100790000228x.

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31

"Permuted Title Index." Abstracts of Working Papers in Economics 8, no. 1 (March 1991): 112–35. http://dx.doi.org/10.1017/s0951007900002369.

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32

"Permuted Title Index." Abstracts of Working Papers in Economics 8, no. 2 (June 1991): 243–67. http://dx.doi.org/10.1017/s0951007900002448.

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33

"Permuted Title Index." Abstracts of Working Papers in Economics 8, no. 3 (September 1991): 382–405. http://dx.doi.org/10.1017/s0951007900002527.

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34

"Permuted Title Index." Abstracts of Working Papers in Economics 8, no. 4 (December 1991): 520–43. http://dx.doi.org/10.1017/s0951007900002606.

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35

"Permuted Title Index." Abstracts of Working Papers in Economics 9, no. 1 (March 1992): 113–36. http://dx.doi.org/10.1017/s0951007900002680.

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36

"Permuted Title Index." Abstracts of Working Papers in Economics 9, no. 2 (June 1992): 242–65. http://dx.doi.org/10.1017/s095100790000276x.

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37

"Permuted Title Index." Abstracts of Working Papers in Economics 9, no. 3-4 (September 1992): 371–94. http://dx.doi.org/10.1017/s0951007900002849.

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38

"Permuted Title Index." Abstracts of Working Papers in Economics 10, no. 1 (March 1992): 112–35. http://dx.doi.org/10.1017/s0951007900002928.

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39

"Permuted Title Index." Abstracts of Working Papers in Economics 10, no. 2-3 (June 1992): 245–68. http://dx.doi.org/10.1017/s0951007900003004.

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40

"Permuted Title Index." Abstracts of Working Papers in Economics 10, no. 4 (December 1992): 374–96. http://dx.doi.org/10.1017/s0951007900003089.

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41

"Permuted Title Index." Abstracts of Working Papers in Economics 13, no. 1 (March 1996): 111–33. http://dx.doi.org/10.1017/s0951007900003168.

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42

"Permuted Title Index." Abstracts of Working Papers in Economics 13, no. 2 (June 1996): 241–62. http://dx.doi.org/10.1017/s0951007900003247.

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43

"Permuted Title Index." Abstracts of Working Papers in Economics 13, no. 3 (September 1996): 375–98. http://dx.doi.org/10.1017/s0951007900003326.

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44

"Permuted Title Index." Abstracts of Working Papers in Economics 13, no. 4 (December 1996): 508–29. http://dx.doi.org/10.1017/s0951007900003399.

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45

"Permuted Title Index." Abstracts of Working Papers in Economics 14, no. 1 (March 1997): 172–207. http://dx.doi.org/10.1017/s0951007900003466.

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46

"Permuted Title Index." Abstracts of Working Papers in Economics 14, no. 2 (June 1997): 330–53. http://dx.doi.org/10.1017/s0951007900003533.

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47

"Permuted Title Index." Abstracts of Working Papers in Economics 14, no. 3 (September 1997): 477–500. http://dx.doi.org/10.1017/s0951007900003600.

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48

"Permuted Title Index." Abstracts of Working Papers in Economics 14, no. 4 (December 1997): 622–45. http://dx.doi.org/10.1017/s0951007900003673.

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49

"Permuted Title Index." Abstracts of Working Papers in Economics 15, no. 1 (February 1998): 124–47. http://dx.doi.org/10.1017/s0951007900003740.

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50

"Permuted Title Index." Abstracts of Working Papers in Economics 15, no. 2 (April 1998): 271–94. http://dx.doi.org/10.1017/s0951007900003818.

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