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- research-articleOctober 2022
Simulation-Informed Revenue Extrapolation with Confidence Estimate for Scaleup Companies Using Scarce Time-Series Data
CIKM '22: Proceedings of the 31st ACM International Conference on Information & Knowledge ManagementPages 2954–2963https://doi.org/10.1145/3511808.3557110Investment professionals rely on extrapolating company revenue into the future (i.e. revenue forecast) to approximate the valuation of scaleups (private companies in a high-growth stage) and inform their investment decision. This task is manual and ...
- surveyNovember 2021
A Comprehensive Taxonomy of Dynamic Texture Representation
ACM Computing Surveys (CSUR), Volume 55, Issue 1Article No.: 23, Pages 1–39https://doi.org/10.1145/3487892Representing dynamic textures (DTs) plays an important role in many real implementations in the computer vision community. Due to the turbulent and non-directional motions of DTs along with the negative impacts of different factors (e.g., environmental ...
- research-articleJanuary 2021
Exact asymptotics for linear quadratic adaptive control
The Journal of Machine Learning Research (JMLR), Volume 22, Issue 1Article No.: 265, Pages 12136–12247Recent progress in reinforcement learning has led to remarkable performance in a range of applications, but its deployment in high-stakes settings remains quite rare. One reason is a limited understanding of the behavior of reinforcement algorithms, both ...
- research-articleSeptember 2020
Upper Bounds of the Deviations in Linear Dynamical System with Bounded Disturbances
Automation and Remote Control (ARCO), Volume 81, Issue 9Pages 1702–1710https://doi.org/10.1134/S000511792009009XAbstractA practically significant effect of a surge occurrences in linear dynamical systems under nonzero initial conditions is explored. The linear dynamical system subjected to unknown-but-bounded exogenous disturbances is considered. Using the ...
- research-articleApril 2020
Inverse system approach to design alpha‐stable noise driven random communication system
In the proposed random communication system (RCS), the alpha‐stable (α‐stable) noise as a random carrier drives the transmitter which is modelled by the linear dynamical system and the skewness parameter of the random carrier encodes the binary messages. ...
- research-articleJanuary 2019
Balanced Truncation for Model Order Reduction of Linear Dynamical Systems with Quadratic Outputs
SIAM Journal on Scientific Computing (SISC), Volume 41, Issue 4Pages A2270–A2295https://doi.org/10.1137/17M1148797We investigate model order reduction (MOR) for linear dynamical systems, where a quadratic output is defined as a quantity of interest. The system can be transformed into a linear dynamical system with many linear outputs. MOR is feasible by the method of ...
- articleJanuary 2018
Gradient descent learns linear dynamical systems
We prove that stochastic gradient descent efficiently converges to the global optimizer of the maximum likelihood objective of an unknown linear time-invariant dynamical system from a sequence of noisy observations generated by the system. Even though ...
- posterOctober 2016
Modulating Dynamic Models for Lip Motion Generation
HAI '16: Proceedings of the Fourth International Conference on Human Agent InteractionPages 75–78https://doi.org/10.1145/2974804.2980499Generation of natural human motion is one of key techniques for multimodal dialogue systems with a human-like avatar. In particular, natural and expressive lip motion synthesis is necessary to make conversation between a user and an avatar richer. ...
- ArticleJune 2015
Feature Ranking in Dynamic Texture Clustering
CRV '15: Proceedings of the 2015 12th Conference on Computer and Robot VisionPages 109–116https://doi.org/10.1109/CRV.2015.23The dynamic texture clustering over space and time, which considers a video as a sample from a linear dynamical system, has recently received great attention. While there exist many algorithms for time-varying characteristics and phenomena clustering, ...
- research-articleSeptember 2014
Piecewise linear dynamical model for actions clustering from inertial body sensors with considerations of human factors
BodyNets '14: Proceedings of the 9th International Conference on Body Area NetworksPages 90–96https://doi.org/10.4108/icst.bodynets.2014.257043The efficacy of many Body Sensor Network (BSN) applications relies on the accurate temporal clustering of human motion into actions on various time scales. This is typically done with the use of inertial sensors and processing algorithms that try to ...
- research-articleSeptember 2014
Multi-sensor physical activity recognition in free-living
UbiComp '14 Adjunct: Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct PublicationPages 431–440https://doi.org/10.1145/2638728.2641673Physical activity monitoring in free-living populations has many applications for public health research, weight-loss interventions, context-aware recommendation systems and assistive technologies. We present a system for physical activity recognition ...
- ArticleMay 2013
A Dynamic Bayesian Framework for Motion Segmentation
CRV '13: Proceedings of the 2013 International Conference on Computer and Robot VisionPages 332–339https://doi.org/10.1109/CRV.2013.32Dynamic textures are sequences of images of moving scenes in time that are common in natural scenes and play an important role in video content analysis. This paper presents a new dynamic Bayesian framework for segmentation of dynamic textures. First, ...
- research-articleJanuary 2013
Compressive Acquisition of Linear Dynamical Systems
SIAM Journal on Imaging Sciences (SJISBI), Volume 6, Issue 4Pages 2109–2133https://doi.org/10.1137/120863307Compressive sensing (CS) enables the acquisition and recovery of sparse signals and images at sampling rates significantly below the classical Nyquist rate. Despite significant progress in the theory and methods of CS, little headway has been made in ...
- research-articleAugust 2007
Switching Linear Dynamical Systems for Noise Robust Speech Recognition
IEEE Transactions on Audio, Speech, and Language Processing (TASLP-II), Volume 15, Issue 6Pages 1850–1858https://doi.org/10.1109/TASL.2007.901312Real world applications such as hands-free dialling in cars may have to deal with potentially very noisy environments. Existing state-of-the-art solutions to this problem use feature-based HMMs, with a preprocessing stage to clean the noisy signal. ...
- research-articleSeptember 2005
Krylov Subspaces Associated with Higher-Order Linear Dynamical Systems
AbstractA standard approach to model reduction of large-scale higher-order linear dynamical systems is to rewrite the system as an equivalent first-order system and then employ Krylov-subspace techniques for model reduction of first-order systems. This ...