39 research outputs found
Noun Sense Disambiguation using Co-Occurrence Relation in Machine Translation
Word Sense Disambiguation, the process of identifying the
meaning of a word in a sentence when the word has multiple meanings,
is a critical problem of machine translation. It is generally very difficult
to select the correct meaning of a word in a sentence, especially when the
syntactical difference between the source and target language is big, e.g.,
English-Korean machine translation. To achieve a high level of accuracy
of noun sense selection in machine translation, we introduced a statistical
method based on co-occurrence relation of words in sentences and applied
it to the English-Korean machine translator RyongNamSan. ACM Computing Classification System (1998): I.2.7
VERIFICATION OF N-M SWITCHING CONTROL SYSTEM: A CASE STUDY IN TEMPORAL LOGIC MODEL CHECKING
Abstract Production factories in which stable voltage is critical, e.g., electro-plating factory, require constantly stable voltage to minimize loss by adjusting incoming voltage in real time even if low-quality electricity is supplied from outside. To solve such problem often being raised from the factories located in the area with unstable electricity supply, we designed N-M switching control system and verified its correctness using LTL model checking. Mathematics Subject Classification 2010 : 03B44, 68Q6
Near-inertial wave scattering by random flows
The impact of a turbulent flow on wind-driven oceanic near-inertial waves is
examined using a linearised shallow-water model of the mixed layer. Modelling
the flow as a homogeneous and stationary random process with spatial scales
comparable to the wavelengths, we derive a transport (or kinetic) equation
governing wave-energy transfers in both physical and spectral spaces. This
equation describes the scattering of the waves by the flow which results in a
redistribution of energy between waves with the same frequency (or,
equivalently, with the same wavenumber) and, for isotropic flows, in the
isotropisation of the wave field. The time scales for the scattering and
isotropisation are obtained explicitly and found to be of the order of tens of
days for typical oceanic parameters. The predictions inferred from the
transport equation are confirmed by a series of numerical simulations.
Two situations in which near-inertial waves are strongly influenced by flow
scattering are investigated through dedicated nonlinear shallow-water
simulations. In the first, a wavepacket propagating equatorwards as a result
from the -effect is shown to be slowed down and dispersed both zonally
and meridionally by scattering. In the second, waves generated by moving
cyclones are shown to be strongly disturbed by scattering, leading again to an
increased dispersion.Comment: Accepted for publication in Phys. Rev. Fluid
Single-Image 3D Human Digitization with Shape-Guided Diffusion
We present an approach to generate a 360-degree view of a person with a
consistent, high-resolution appearance from a single input image. NeRF and its
variants typically require videos or images from different viewpoints. Most
existing approaches taking monocular input either rely on ground-truth 3D scans
for supervision or lack 3D consistency. While recent 3D generative models show
promise of 3D consistent human digitization, these approaches do not generalize
well to diverse clothing appearances, and the results lack photorealism. Unlike
existing work, we utilize high-capacity 2D diffusion models pretrained for
general image synthesis tasks as an appearance prior of clothed humans. To
achieve better 3D consistency while retaining the input identity, we
progressively synthesize multiple views of the human in the input image by
inpainting missing regions with shape-guided diffusion conditioned on
silhouette and surface normal. We then fuse these synthesized multi-view images
via inverse rendering to obtain a fully textured high-resolution 3D mesh of the
given person. Experiments show that our approach outperforms prior methods and
achieves photorealistic 360-degree synthesis of a wide range of clothed humans
with complex textures from a single image.Comment: SIGGRAPH Asia 2023. Project website: https://human-sgd.github.io