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FRACTALE KOCH [4 records]
Record 1 - internal organization data 1995-10-16
Record 1, English
Record 1, Subject field(s)
- Mathematics
- Computer Graphics
Record 1, Main entry term, English
- anti-snowflake curve
1, record 1, English, anti%2Dsnowflake%20curve
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- anti-snowflake 1, record 1, English, anti%2Dsnowflake
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
Curve resembling a snowflake whose triangles are constructed inward instead of outward. Its perimeter is also infinite, and its bounds an infinity of disconnected regions with a total area equal to 2/5 that of the original triangle. 2, record 1, English, - anti%2Dsnowflake%20curve
Record 1, Key term(s)
- antisnowflake,antisnowflake curve
Record 1, French
Record 1, Domaine(s)
- Mathématiques
- Infographie
Record 1, Main entry term, French
- courbe anti-flocon
1, record 1, French, courbe%20anti%2Dflocon
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- anti-flocon 1, record 1, French, anti%2Dflocon
correct, masculine noun
- antiflocon 2, record 1, French, antiflocon
proposal, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Courbe fractale semblable à celle de Koch mais avec les trois triangles pointés vers l'intérieur. 1, record 1, French, - courbe%20anti%2Dflocon
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 1994-08-02
Record 2, English
Record 2, Subject field(s)
- Mathematics
- Computer Graphics
Record 2, Main entry term, English
- snowflake
1, record 2, English, snowflake
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- Koch island 2, record 2, English, Koch%20island
correct
- snowflake curve 3, record 2, English, snowflake%20curve
correct
- Koch snowflake 4, record 2, English, Koch%20snowflake
correct
- von Koch curve 5, record 2, English, von%20Koch%20curve
correct
- triadic von Koch curve 6, record 2, English, triadic%20von%20Koch%20curve
correct
- Koch flake 7, record 2, English, Koch%20flake
correct
- von Koch snowflake curve 8, record 2, English, von%20Koch%20snowflake%20curve
correct
- Koch curve 9, record 2, English, Koch%20curve
correct
- triadic Koch curve 10, record 2, English, triadic%20Koch%20curve
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
The von Koch curve. An interesting curve S shaped like a snowflake was proposed by von Koch (1904). It may be defined as follows. Let S0 be the three sides of an equilateral triangle, each side having length one. Then the length of the curve S0 is three. Let S1 be the curve for which the middle third of each straight part of S1 is replaced by two equal straight lines directed outwards, so that the replacement is two sides of an equilateral triangle of which the middle third is the base. 8, record 2, English, - snowflake
Record 2, French
Record 2, Domaine(s)
- Mathématiques
- Infographie
Record 2, Main entry term, French
- flocon de neige
1, record 2, French, flocon%20de%20neige
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- île de von Koch 2, record 2, French, %C3%AEle%20de%20von%20Koch
correct, feminine noun
- courbe de von Koch 3, record 2, French, courbe%20de%20von%20Koch
correct, feminine noun
- courbe triadique de von Koch 4, record 2, French, courbe%20triadique%20de%20von%20Koch
correct, feminine noun
- courbe de Koch 5, record 2, French, courbe%20de%20Koch
correct, feminine noun
- courbe von Koch 6, record 2, French, courbe%20von%20Koch
correct, feminine noun
- fractale de Koch 4, record 2, French, fractale%20de%20Koch
correct, feminine noun
- courbe triadique de Koch 7, record 2, French, courbe%20triadique%20de%20Koch
correct, feminine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Courbe simple, de dimension fractale D=1,26..., construite en partant d’un segment sur lequel on retire le tiers central, en le remplaçant par un triangle équilatéral sans base, et en recommençant l’opération sur chacun des segments. Propriétés : longueur infinie, distance infinie entre deux points arbitrairement choisis sur la courbe; comme la courbe de Peano, ses points n’ont pas de tangente unique. 4, record 2, French, - flocon%20de%20neige
Record number: 2, Textual support number: 1 OBS
Construite par Helge von Koch (1870-1924), cette courbe est parfois appelée, «chardon de van der Waerden». B. Mandelbrot s’en est servi pour représenter une côte de Bretagne hypothétique. 4, record 2, French, - flocon%20de%20neige
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 1994-06-01
Record 3, English
Record 3, Subject field(s)
- Mathematics
- Computer Graphics
Record 3, Main entry term, English
- fractal dimension
1, record 3, English, fractal%20dimension
correct
Record 3, Abbreviations, English
- D 2, record 3, English, D
correct
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
The notion of fractal dimension provides a numerical measure of the wiggliness of a curve or the roughness of a surface. It fits within the intuitive idea that a crinkly curve somehow covers more of a given area than a smooth curve and that a rough surface fills more space than a smooth one. Beyond that, a fractal dimension is a way of expressing the fact that a fractal is self-similar, or contains copies of itself. It reflects the relationship between the whole and its parts. 3, record 3, English, - fractal%20dimension
Record 3, French
Record 3, Domaine(s)
- Mathématiques
- Infographie
Record 3, Main entry term, French
- dimension fractale
1, record 3, French, dimension%20fractale
correct, feminine noun
Record 3, Abbreviations, French
- D 2, record 3, French, D
correct, feminine noun
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Nombre qui sert à quantifier le degré d’irrégularité et de fragmentation d’un ensemble géométrique, d’un objet naturel ou d’un système dynamique. Ce nombre, qui mesure la manière dont ces entités remplissent l’espace dans lequel elles se trouvent, n’est pas nécessairement un entier. 2, record 3, French, - dimension%20fractale
Record number: 3, Textual support number: 1 OBS
Par exemple, la dimension des courbes de Koch est D=1, 26..., celle des nuages varie entre 2, 2 et 2, 3, celle des montagnes se trouve entre 2, 1 et 2, 3. Il existe plusieurs définitions de la dimension fractale qui ne sont pas formellement équivalentes et qui conduisent à des valeurs numériques différentes aussi bien du point de vue mathématique que pour des cas concrets. Certaines définitions soulignent la connectivité intrinsèque d’un objet(dimension d’étalement, ou chimique), d’autres considèrent plutôt la façon dont l'objet emplit l'espace ambiant(dimension d’empilement, de tortuosité, dimension spectrale). Les recherches en cours étudient des aspects très importants pour la description des systèmes dynamiques tels l'élasticité sous déformation et l'intermittence. D'autre part, il existe déjà des méthodes très simples pour construire des lignes, des surfaces et des volumes à dimension fractale. 2, record 3, French, - dimension%20fractale
Record number: 3, Textual support number: 1 PHR
La dimension fractale s’accentue, augmente, croît, décroît, diminue, quantifie, renseigne sur la répartition de la masse, tend vers zéro, varie. 2, record 3, French, - dimension%20fractale
Record number: 3, Textual support number: 2 PHR
calculer, correspondre à, évaluer, extraire, obtenir une dimension fractale. 2, record 3, French, - dimension%20fractale
Record number: 3, Textual support number: 3 PHR
dimension fractale chimique, spectrale. 2, record 3, French, - dimension%20fractale
Record number: 3, Textual support number: 4 PHR
dimension fractale d’empilement, d’étalement, de tortuosité. 2, record 3, French, - dimension%20fractale
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 1989-02-08
Record 4, English
Record 4, Subject field(s)
- Mathematics
- Computer Graphics
Record 4, Main entry term, English
- fractal property
1, record 4, English, fractal%20property
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
On the basis of the Von Koch model the resulting impedance is shown to follow a power law of the local interfacial impedance at the lower scale cut-off of the fractal properties. 1, record 4, English, - fractal%20property
Record 4, French
Record 4, Domaine(s)
- Mathématiques
- Infographie
Record 4, Main entry term, French
- propriété fractale
1, record 4, French, propri%C3%A9t%C3%A9%20fractale
correct, feminine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
Sur la base du modèle de von Koch d’une courbe(ou d’une surface) fractale on montre que l'impédance résultante est une puissance fractionnaire de l'impédance locale à l'échelle de la coupure inférieure des propriétés fractales. 1, record 4, French, - propri%C3%A9t%C3%A9%20fractale
Record 4, Spanish
Record 4, Textual support, Spanish
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