An Time Fourier Set Query Algorithm

Y Gao, Z Song, B Sun - arXiv preprint arXiv:2208.09634, 2022 - arxiv.org
… transformation is sufficient and we only need to do the Fourier transform on a subset of … ǫ
and a query set S ⊂ [n] of size k, we propose an algorithm to compute an approximate Fourier

Fourier transform based techniques in efficient retrieval of similar time sequences

D Rafiei - 1999 - tspace.library.utoronto.ca
… that affect the search time of a proximity query, if we assume the CPU time to be negligible;
… In section 4.4 we develop algorithms for efficiently processing similarity queries using an R-…

Similarity-based queries for time series data

D Rafiei, A Mendelzon - Proceedings of the 1997 ACM SIGMOD …, 1997 - dl.acm.org
… on a data set, we describe a fast query processing algorithm that uses the index to filter out
… We have chosen the first k Fourier coefficient of a time series as our features. The reason for …

Efficient computation of the short-time fast Fourier transform

HV Sorensen, CS Burrus - ICASSP-88., International Conference on …, 1988 - computer.org
… This is a plot of thequery time bound we obtained and the p-stable LSHthat has query
points from all queries, we learnedthe best parameters for our algorithm, requestingthe same …

Implementation issues in the Fourier transform algorithm

Y Mansour, S Sahar - Machine Learning, 2000 - Springer
query model, in which the Fourier transform algorithm is set. In order to keep the algorithm
run-time … coefficients, 2n, calculating this hypothesis would take exponential time, while our …

Querying time series data based on similarity

D Rafiei, AO Mendelzon - IEEE Transactions on Knowledge …, 2000 - ieeexplore.ieee.org
… We present a query processing algorithm that uses the underlying multidimensional index
built … Since we use the Fourier series representation of time series data as our features, and a …

[PDF][PDF] Weakly learning DNF and characterizing statistical query learning using Fourier analysis

A Blum, M Furst, J Jackson, M Kearns… - Proceedings of the …, 1994 - dl.acm.org
… an algorithm due to Kushilevitz and Mansour[16] can be used to weakly learn DNF using
membership queries in polynomial time, … DNF expressions in polynomial time in any nontrivial …

An improved quantum Fourier transform algorithm and applications

L Hales, S Hallgren - Proceedings 41st Annual Symposium on …, 2000 - ieeexplore.ieee.org
… This algorithm compares favorably to [l 11 which requires time quadratic in n to achieve …
tially close functions typically require exponentially many queries to the function's values. Thus …

An efficient query-by-singing/humming system based on fast fourier transforms of note sequences

WH Tsai, YM Tu - 2012 IEEE International Conference on …, 2012 - ieeexplore.ieee.org
… the frequency domain instead of time domain. Thanks to the merit of fast Fourier transform,
we … distance directly, which avoids performing timeconsuming alignment between sequences. …

Efficient similarity search in sequence databases

R Agrawal, C Faloutsos, A Swami - … of Data Organization and Algorithms …, 1993 - Springer
time sequences for processing similarity queries. We use the Discrete Fourier Transform (DFT)
to map time … DFT is the existence of a fast algorithm, the Fast Fourier Transform (FFT), that …