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| Kaiko Tilaverkko× | Näyte-entropia× | |
|---|---|---|
| Tieteenala≠ | Syväoppiminen | Kompleksiset järjestelmät |
| Menetelmäperhe | Machine learning | Machine learning |
| Syntyvuosi≠ | 2004 | 2000 |
| Kehittäjä≠ | Herbert Jaeger & Harald Haas | Richman & Moorman |
| Tyyppi≠ | Recurrent neural network with fixed random reservoir | Nonlinear entropy measure |
| Alkuperäislähde≠ | Jaeger, H., & Haas, H. (2004). Harnessing nonlinearity: Predicting chaotic systems and saving energy in wireless communication. Science, 304(5667), 78–80. DOI ↗ | Richman, J. S., & Moorman, J. R. (2000). Physiological time-series analysis using approximate entropy and sample entropy. American Journal of Physiology, 278(6), H2039–H2049. DOI ↗ |
| Rinnakkaisnimet | ESN, Liquid State Machine (related formulation), Reservoir Computing, Yankı Durum Ağı | SampEn, Sample Entropy (SampEn), Örneklem Entropisi, Nonlinear Complexity Measure |
| Liittyvät≠ | 3 | 2 |
| Tiivistelmä≠ | An Echo State Network (ESN) is a type of recurrent neural network introduced by Herbert Jaeger and Harald Haas in 2004 that exploits a large, randomly connected, fixed recurrent layer — the reservoir — to project input signals into a high-dimensional nonlinear space. Only the linear output weights are trained, typically via ridge regression, making ESNs computationally inexpensive yet highly expressive for temporal and chaotic time-series modeling tasks. | Sample Entropy (SampEn) is a nonlinear measure of the complexity and regularity of a time series. Introduced by Richman and Moorman in 2000 as an improvement over Approximate Entropy (ApEn), it quantifies the likelihood that similar patterns of a given length in the series remain similar when extended by one additional data point. A higher SampEn value indicates greater irregularity and complexity, while a lower value indicates more regularity or self-similarity. |
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