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Isolation Forest×Penyelarasan Model×Kuantifikasi Ketidakpastian×
BidangPembelajaran MesinPembelajaran MesinSimulasi
KeluargaMachine learningMachine learningProcess / pipeline
Tahun asal20082017Seminal modern form: 2002
PengasasLiu, F.T., Ting, K.M. & Zhou, Z.-H.Platt; Guo et al.Norbert Wiener (polynomial chaos, 1938); extended to Wiener–Askey scheme by Xiu & Karniadakis (2002)
JenisUnsupervised ensemble (random partitioning trees)Post-hoc probability correction techniqueComputational uncertainty analysis framework
Sumber perintisLiu, F.T., Ting, K.M. & Zhou, Z.-H. (2008). Isolation Forest. IEEE ICDM, 413–422. DOI ↗Guo, C., Pleiss, G., Sun, Y., & Weinberger, K. Q. (2017). On calibration of modern neural networks. International Conference on Machine Learning, 1321–1330. link ↗Xiu, D. & Karniadakis, G.E. (2002). The Wiener-Askey Polynomial Chaos for Stochastic Differential Equations. SIAM Journal on Scientific Computing, 24(2), 619–644. DOI ↗
AliasIsolation Forest (Aykırı Değer Tespiti), iForest, isolation forest anomaly detectionClassifier Calibration, Probability Calibration, Score Calibration, Model KalibrasyonuUQ, polynomial chaos expansion, PCE, Kriging surrogate
Berkaitan539
RingkasanIsolation Forest is an unsupervised machine-learning method for anomaly and outlier detection, introduced by Liu, Ting and Zhou in 2008, that isolates anomalies through random partitioning of the data. It works without any labelled anomaly data and scales to high-dimensional datasets.Model calibration is a post-hoc technique that adjusts the probability outputs of a trained classifier so that predicted confidence scores match empirical outcome frequencies. A classifier is said to be perfectly calibrated if, among all predictions made with confidence p, exactly a fraction p of them are correct. Systematic miscalibration of modern deep neural networks was rigorously documented by Guo et al. (2017), who showed that networks trained with standard cross-entropy loss tend to be overconfident, and proposed temperature scaling as a simple, effective remedy.Uncertainty Quantification (UQ) is a computational framework for systematically measuring how uncertainty in the inputs of a model propagates into uncertainty in its outputs. Building on Wiener's polynomial chaos theory (1938) and formalised for general stochastic problems by Xiu and Karniadakis (2002), UQ uses two primary strategies: Polynomial Chaos Expansion (PCE), which represents the model output as a series of orthogonal polynomials matched to the input distributions, and Kriging (Gaussian process) surrogates, which replace an expensive simulation with a fast statistical approximation fitted to a small set of carefully chosen runs.
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ScholarGateBandingkan kaedah: Isolation Forest · Model Calibration · Uncertainty Quantification. Dicapai 2026-06-19 daripada https://scholargate.app/ms/compare