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| It is sometimes said that fractals are scale-invariant, although more precisely, one should say that they are self-similar. A fractal is equal to itself typically for only a discrete set of values , and even then a translation and rotation may have to be applied to match the fractal up to itself. | | It is sometimes said that fractals are scale-invariant, although more precisely, one should say that they are self-similar. A fractal is equal to itself typically for only a discrete set of values , and even then a translation and rotation may have to be applied to match the fractal up to itself. |
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− | 有时人们认为分形是标度不变的,尽管更准确地来说,应该说分形是自相似的。一个分形通常是等于它自己的一个{{mvar|λ}}值离散集合,即使这样,一个平移和旋转可能不得不应用到匹配分形到它自己。
| + | 有时人们认为分形是标度不变的,尽管更准确地来说,应该说分形是自相似的。分形通常是在某个{{mvar|λ}}值的离散集合内等同于其本身,即使这样,有时也需要通过平移和旋转变换来实现。 |
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| Thus, for example, the [[Koch curve]] scales with {{math|∆ {{=}} 1}}, but the scaling holds only for values of {{math|''λ'' {{=}} 1/3<sup>''n''</sup>}} for integer {{mvar|n}}. In addition, the Koch curve scales not only at the origin, but, in a certain sense, "everywhere": miniature copies of itself can be found all along the curve. | | Thus, for example, the [[Koch curve]] scales with {{math|∆ {{=}} 1}}, but the scaling holds only for values of {{math|''λ'' {{=}} 1/3<sup>''n''</sup>}} for integer {{mvar|n}}. In addition, the Koch curve scales not only at the origin, but, in a certain sense, "everywhere": miniature copies of itself can be found all along the curve. |
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| Thus, for example, the Koch curve scales with , but the scaling holds only for values of for integer . In addition, the Koch curve scales not only at the origin, but, in a certain sense, "everywhere": miniature copies of itself can be found all along the curve. | | Thus, for example, the Koch curve scales with , but the scaling holds only for values of for integer . In addition, the Koch curve scales not only at the origin, but, in a certain sense, "everywhere": miniature copies of itself can be found all along the curve. |
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− | 因此,举例来说,Koch 曲线的尺度为,但是该尺度只适用于整数的值。此外,科氏曲线不仅在起源处,而且在某种意义上说,“到处”都是科氏曲线的缩影: 曲线上到处都可以找到科氏曲线本身的缩影。
| + | 因此,以{{math|∆ {{=}} 1}}的'''Koch Curve 科赫雪花'''缩放为例,但是该缩放只适用于{{math|''λ'' {{=}} 1/3<sup>''n''</sup>}},({{mvar|n}}为整数)的值。此外,科赫雪花不仅在初始点,而且在某种意义上,在整条曲线上都可以找到其“缩影”。 |
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| Some fractals may have multiple scaling factors at play at once; such scaling is studied with [[multi-fractal analysis]]. | | Some fractals may have multiple scaling factors at play at once; such scaling is studied with [[multi-fractal analysis]]. |
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| Some fractals may have multiple scaling factors at play at once; such scaling is studied with multi-fractal analysis. | | Some fractals may have multiple scaling factors at play at once; such scaling is studied with multi-fractal analysis. |
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− | 某些分形可能同时具有多个标度因子,这种标度是用多重分形分析研究的。
| + | 某些分形可能同时具有多个标度因子,可以应用'''Multi-Fractal Analysis 多重分形分析'''进行研究。 |
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| Periodic [[External ray|external and internal rays]] are invariant curves . | | Periodic [[External ray|external and internal rays]] are invariant curves . |
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| Periodic external and internal rays are invariant curves . | | Periodic external and internal rays are invariant curves . |
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− | 周期性的外部和内部射线是不变的曲线。
| + | 周期性外部和内部射线是不变的曲线。 |
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| ==Scale invariance in stochastic processes== | | ==Scale invariance in stochastic processes== |