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- research-articleOctober 2024
Not All Frequencies Are Created Equal: Towards a Dynamic Fusion of Frequencies in Time-Series Forecasting
MM '24: Proceedings of the 32nd ACM International Conference on MultimediaPages 4729–4737https://doi.org/10.1145/3664647.3681210Long-term time series forecasting is a long-standing challenge in various applications. A central issue in time series forecasting is that methods should expressively capture long-term dependency. Furthermore, time series forecasting methods should be ...
- research-articleSeptember 2021
Junta distance approximation with sub-exponential queries
CCC '21: Proceedings of the 36th Computational Complexity ConferenceArticle No.: lipics, Page 1https://doi.org/10.4230/LIPIcs.CCC.2021.24Leveraging tools of De, Mossel, and Neeman [FOCS, 2019], we show two different results pertaining to the tolerant testing of juntas. Given black-box access to a Boolean function f : {±1}n → {±1}:
1. We give a [EQUATION] query algorithm that ...
- research-articleSeptember 2021
Fractional pseudorandom generators from any fourier level
CCC '21: Proceedings of the 36th Computational Complexity ConferenceArticle No.: lipics, Page 1https://doi.org/10.4230/LIPIcs.CCC.2021.10We prove new results on the polarizing random walk framework introduced in recent works of Chattopadhyay et al. [4, 6] that exploit L1 Fourier tail bounds for classes of Boolean functions to construct pseudorandom generators (PRGs). We show that given a ...
- research-articleSeptember 2019
Application of wavelet transform method for beer production forecasting
ICBIM '19: Proceedings of the 3rd International Conference on Business and Information ManagementPages 148–151https://doi.org/10.1145/3361785.3361817By wavelet transform (WT) a time series can be decomposed into a time-dependent sum of frequency components. As a result, we are able to capture seasonality with time-varying period and intensity, which nourishes the belief that incorporation of the ...
- research-articleSeptember 2019
Statistical analysis of time series and investigation of seasonal fluctuations on beer production
ICBIM '19: Proceedings of the 3rd International Conference on Business and Information ManagementPages 134–137https://doi.org/10.1145/3361785.3361816In the presented paper time series modeling on the basis of collected data is used to study the past observations of a time series. On the basis of findings, an appropriate model is developed which describes the inherent structure of the time series. ...
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- articleMay 2019
Periodic fourier representation of boolean functions
In this work, we consider a new type of Fourier-like representation of Boolean function f: {+1, –1}n → {+1,-1} \[ f(x) = \cos\left(π\sum_{S\subseteq[n]}ϕ_S \prod_{i\in S} x_i\right). \] This representation, which we call the periodic Fourier ...
- research-articleAugust 2018
Valuing supply‐chain responsiveness under demand jumps
Journal of Operations Management (WILEY-JOM), Volume 61, Issue 1Pages 46–67https://doi.org/10.1016/j.jom.2018.06.002AbstractAs the time between the decision about what to produce and the moment when demand is observed (the decision lead time) increases, the demand forecast becomes more uncertain. Uncertainty can increase gradually in decision lead time, or can increase ...
- research-articleMay 2016
Polynomial bounds for decoupling, with applications
CCC '16: Proceedings of the 31st Conference on Computational ComplexityArticle No.: 24, Pages 1–18Let f(x) = f(x1, ..., xn) = Σ|S|≤k aS IIi∈S xi be an n-variate real multilinear polynomial of degree at most k, where S ⊆ [n] = {1, 2, ..., n}. For its one-block decoupled version.
[EQUATION]
we show tail-bound comparisons of the form
[EQUATION]
Our ...
- research-articleSeptember 2015
Analytical Solutions for Distributed Interconnect Models—Part II: Arbitrary Input Response and Multicoupled Lines
IEEE Transactions on Very Large Scale Integration (VLSI) Systems (ITVL), Volume 23, Issue 9Pages 1879–1888https://doi.org/10.1109/TVLSI.2014.2356432In this paper, a new method is presented to calculate the exact analytical solution of distributed RC, LC, and RLC interconnects with a random input at an arbitrary point through the line. The proposed method, based on a modified Duhamel theorem, is used ...
- research-articleJuly 2015
Variance analysis for Monte Carlo integration
ACM Transactions on Graphics (TOG), Volume 34, Issue 4Article No.: 124, Pages 1–14https://doi.org/10.1145/2766930We propose a new spectral analysis of the variance in Monte Carlo integration, expressed in terms of the power spectra of the sampling pattern and the integrand involved. We build our framework in the Euclidean space using Fourier tools and on the ...
- research-articleJune 2015
Improved Noisy Population Recovery, and Reverse Bonami-Beckner Inequality for Sparse Functions
STOC '15: Proceedings of the forty-seventh annual ACM symposium on Theory of ComputingPages 137–142https://doi.org/10.1145/2746539.2746540The noisy population recovery problem is a basic statistical inference problem. Given an unknown distribution in {0,1}n with support of size k, and given access only to noisy samples from it, where each bit is flipped independently with probability (1-μ)...
- research-articleJuly 2014
Classification and characterisation of movement patterns during levodopa therapy for parkinson's disease
- Michael A. Lones,
- Jane E. Alty,
- Phillipa Duggan-Carter,
- Andrew J. Turner,
- D.R. Stuart Jamieson,
- Stephen L. Smith
GECCO Comp '14: Proceedings of the Companion Publication of the 2014 Annual Conference on Genetic and Evolutionary ComputationPages 1321–1328https://doi.org/10.1145/2598394.2609852Parkinson's disease is a chronic neurodegenerative condition that manifests clinically with various movement disorders. These are often treated with the dopamine-replacement drug levodopa. However, the dosage of levodopa must be kept as low as possible ...
- research-articleJanuary 2014
Locally testable codes and cayley graphs
ITCS '14: Proceedings of the 5th conference on Innovations in theoretical computer sciencePages 81–92https://doi.org/10.1145/2554797.2554807We give two new characterizations of ( 2-linear, smooth) locally testable error-correcting codes in terms of Cayley graphs over Fh2:
- A locally testable code is equivalent to a Cayley graph over h2 whose set of generators is significantly larger than h ...
- research-articleJuly 2013
Fourier analysis of stochastic sampling strategies for assessing bias and variance in integration
ACM Transactions on Graphics (TOG), Volume 32, Issue 4Article No.: 128, Pages 1–12https://doi.org/10.1145/2461912.2462013Each pixel in a photorealistic, computer generated picture is calculated by approximately integrating all the light arriving at the pixel, from the virtual scene. A common strategy to calculate these high-dimensional integrals is to average the ...
- research-articleJuly 2013
Practical SVBRDF capture in the frequency domain
ACM Transactions on Graphics (TOG), Volume 32, Issue 4Article No.: 110, Pages 1–12https://doi.org/10.1145/2461912.2461978Spatially-varying reflectance and small geometric variations play a vital role in the appearance of real-world surfaces. Consequently, robust, automatic capture of such models is highly desirable; however, current systems require either specialized ...
- ArticleOctober 2012
Frequency analysis of transient light transport with applications in bare sensor imaging
- Di Wu,
- Gordon Wetzstein,
- Christopher Barsi,
- Thomas Willwacher,
- Matthew O’Toole,
- Nikhil Naik,
- Qionghai Dai,
- Kyros Kutulakos,
- Ramesh Raskar
ECCV'12: Proceedings of the 12th European conference on Computer Vision - Volume Part IPages 542–555https://doi.org/10.1007/978-3-642-33718-5_39Light transport has been analyzed extensively, in both the primal domain and the frequency domain; the latter provides intuition of effects introduced by free space propagation and by optical elements, and allows for optimal designs of computational ...
- research-articleMay 2012
Nearly optimal solutions for the chow parameters problem and low-weight approximation of halfspaces
STOC '12: Proceedings of the forty-fourth annual ACM symposium on Theory of computingPages 729–746https://doi.org/10.1145/2213977.2214043The Chow parameters of a Boolean function f: {-1,1}n -> {-1,1} are its n+1 degree-0 and degree-1 Fourier coefficients. It has been known since 1961 [Cho61, Tan61] that the (exact values of the) Chow parameters of any linear threshold function f uniquely ...
- ArticleNovember 2011
Rational approximations for time-delay systems: case studies
Linear time-invariant time-delay systems (LTI-TDS) constitute a widespread family of plants and systems, not only limited to industrial ones. They can be represented by Laplace transfer functions in the form of fractions of so-called quasipolynomials. ...
- ArticleJuly 2011
Appearance similarity index for medicinal ampoule labels
- Masaomi Kimura,
- Yutaroh Furukawa,
- Akira Kojo,
- Hirotsugu Ishida,
- Keita Nabeta,
- Michiko Ohkura,
- Fumito Tsuchiya
Since there are many ampoule injection medicines, it is important to make their labels easily distinguishable because confusing labels may lead to fatal accidents caused by administering the wrong medicine by mistake. In this paper, we utilize Fourier ...
- ArticleNovember 2010
Simulation of postural sway by elastically tethered random walk
Stabilometry is routinely used to asses postural steadiness of human body by measuring the movements of the centre of pressure (postural sway) of a standing subject with a force platform. Data acquisition time dependence of various postural sway ...