105 research outputs found
Meta-Generalization for Multiparty Privacy Learning to Identify Anomaly Multimedia Traffic in Graynet
Identifying anomaly multimedia traffic in cyberspace is a big challenge in
distributed service systems, multiple generation networks and future internet
of everything. This letter explores meta-generalization for a multiparty
privacy learning model in graynet to improve the performance of anomaly
multimedia traffic identification. The multiparty privacy learning model in
graynet is a globally shared model that is partitioned, distributed and trained
by exchanging multiparty parameters updates with preserving private data. The
meta-generalization refers to discovering the inherent attributes of a learning
model to reduce its generalization error. In experiments, three
meta-generalization principles are tested as follows. The generalization error
of the multiparty privacy learning model in graynet is reduced by changing the
dimension of byte-level imbedding. Following that, the error is reduced by
adapting the depth for extracting packet-level features. Finally, the error is
reduced by adjusting the size of support set for preprocessing traffic-level
data. Experimental results demonstrate that the proposal outperforms the
state-of-the-art learning models for identifying anomaly multimedia traffic.Comment: Correct some typo
The Embedding Problem for Markov Models of Nucleotide Substitution
10.1371/journal.pone.0069187PLoS ONE87-POLN
Fairness in Forecasting of Observations of Linear Dynamical Systems
In machine learning, training data often capture the behaviour of multiple
subgroups of some underlying human population. When the nature of training data
for subgroups are not controlled carefully, under-representation bias arises.
To counter this effect we introduce two natural notions of subgroup fairness
and instantaneous fairness to address such under-representation bias in
time-series forecasting problems. Here we show globally convergent methods for
the fairness-constrained learning problems using hierarchies of
convexifications of non-commutative polynomial optimisation problems. Our
empirical results on a biased data set motivated by insurance applications and
the well-known COMPAS data set demonstrate the efficacy of our methods. We also
show that by exploiting sparsity in the convexifications, we can reduce the run
time of our methods considerably.Comment: Journal version of Zhou et al. [arXiv:2006.07315, AAAI 2021
Numerical continuation methods: a perspective
AbstractIn this historical perspective the principal numerical approaches to continuation methods are outlined in the framework of the mathematical sources that contributed to their development, notably homotopy and degree theory, simplicial complexes and mappings, submanifolds defined by submersions, and singularity and foldpoint theory
Summary of research in applied mathematics, numerical analysis and computer science at the Institute for Computer Applications in Science and Engineering
Research conducted at the Institute for Computer Applications in Science and Engineering in applied mathematics, numerical analysis and computer science during the period October 1, 1983 through March 31, 1984 is summarized
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