6,123 research outputs found
Eyeriss v2: A Flexible Accelerator for Emerging Deep Neural Networks on Mobile Devices
A recent trend in DNN development is to extend the reach of deep learning
applications to platforms that are more resource and energy constrained, e.g.,
mobile devices. These endeavors aim to reduce the DNN model size and improve
the hardware processing efficiency, and have resulted in DNNs that are much
more compact in their structures and/or have high data sparsity. These compact
or sparse models are different from the traditional large ones in that there is
much more variation in their layer shapes and sizes, and often require
specialized hardware to exploit sparsity for performance improvement. Thus,
many DNN accelerators designed for large DNNs do not perform well on these
models. In this work, we present Eyeriss v2, a DNN accelerator architecture
designed for running compact and sparse DNNs. To deal with the widely varying
layer shapes and sizes, it introduces a highly flexible on-chip network, called
hierarchical mesh, that can adapt to the different amounts of data reuse and
bandwidth requirements of different data types, which improves the utilization
of the computation resources. Furthermore, Eyeriss v2 can process sparse data
directly in the compressed domain for both weights and activations, and
therefore is able to improve both processing speed and energy efficiency with
sparse models. Overall, with sparse MobileNet, Eyeriss v2 in a 65nm CMOS
process achieves a throughput of 1470.6 inferences/sec and 2560.3 inferences/J
at a batch size of 1, which is 12.6x faster and 2.5x more energy efficient than
the original Eyeriss running MobileNet. We also present an analysis methodology
called Eyexam that provides a systematic way of understanding the performance
limits for DNN processors as a function of specific characteristics of the DNN
model and accelerator design; it applies these characteristics as sequential
steps to increasingly tighten the bound on the performance limits.Comment: accepted for publication in IEEE Journal on Emerging and Selected
Topics in Circuits and Systems. This extended version on arXiv also includes
Eyexam in the appendi
Spatial Equilibrium Analysis of the World Durum Industry Under Alternative Export Policies
International Relations/Trade,
Regularity points and Jensen measures for R(X)
We discuss two types of `regularity point', points of continuity and R-points for Banach function algebras, which were introduced by the first author and Somerset in [16]. We show that, even for the natural uniform algebras R(X) (for compact plane sets X), these two types of regularity point can be different. We then give a new method for constructing Swiss cheese sets X such that R(X) is not regular, but such that R(X) has no non-trivial Jensen measures. The original construction appears in the first author's previous work. Our new approach to constructing such sets is more general, and allows us to obtain additional properties. In particular, we use our construction to give an example of such a Swiss cheese set X with the property that the set of points of discontinuity for R(X) has positive area
Clustering of Hotspots in the Cosmic Microwave Background
The physics behind the origin and composition of the Cosmic Microwave
Background (CMB) is a well-established topic in the field of Cosmology.
Literature on CMB anisotropies reveal consistency with Gaussianity, but these
were conducted on full multi-frequency temperature maps. In this thesis, we
utilise clustering algorithms to specifically conduct statistical analyses on
the distribution of hotspots in the CMB. We describe a series of data
processing and clustering methodologies conducted, with results that
conclusively show that the counts-in-cells distribution of hotspots in the CMB
does not follow a Poisson distribution. Rather, the distribution exhibits a
much closer fit to both the Negative Binomial Distribution (NBD) and the
Gravitational Quasi-Equilibrium Distribution (GQED). From this result, we
conclude that structure likely existed in the early universe, from the period
of the recombination Epoch, possibly opening new insights in the field of
galaxy formation.Comment: Poster presented at the XLVIII International Symposium on
Multiparticle Dynamics (ISMD2018
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