6,382 research outputs found
Solutions to some sign change problems on the functions involving sums of divisors
In this note, we solve some sign change problems on the functions involving
sums of divisors posed by Pongsriiam recently
A High-Performance Triple Patterning Layout Decomposer with Balanced Density
Triple patterning lithography (TPL) has received more and more attentions
from industry as one of the leading candidate for 14nm/11nm nodes. In this
paper, we propose a high performance layout decomposer for TPL. Density
balancing is seamlessly integrated into all key steps in our TPL layout
decomposition, including density-balanced semi-definite programming (SDP),
density-based mapping, and density-balanced graph simplification. Our new TPL
decomposer can obtain high performance even compared to previous
state-of-the-art layout decomposers which are not balanced-density aware, e.g.,
by Yu et al. (ICCAD'11), Fang et al. (DAC'12), and Kuang et al. (DAC'13).
Furthermore, the balanced-density version of our decomposer can provide more
balanced density which leads to less edge placement error (EPE), while the
conflict and stitch numbers are still very comparable to our
non-balanced-density baseline
Say Anything with Any Style
Generating stylized talking head with diverse head motions is crucial for
achieving natural-looking videos but still remains challenging. Previous works
either adopt a regressive method to capture the speaking style, resulting in a
coarse style that is averaged across all training data, or employ a universal
network to synthesize videos with different styles which causes suboptimal
performance. To address these, we propose a novel dynamic-weight method, namely
Say Anything withAny Style (SAAS), which queries the discrete style
representation via a generative model with a learned style codebook.
Specifically, we develop a multi-task VQ-VAE that incorporates three closely
related tasks to learn a style codebook as a prior for style extraction. This
discrete prior, along with the generative model, enhances the precision and
robustness when extracting the speaking styles of the given style clips. By
utilizing the extracted style, a residual architecture comprising a canonical
branch and style-specific branch is employed to predict the mouth shapes
conditioned on any driving audio while transferring the speaking style from the
source to any desired one. To adapt to different speaking styles, we steer
clear of employing a universal network by exploring an elaborate HyperStyle to
produce the style-specific weights offset for the style branch. Furthermore, we
construct a pose generator and a pose codebook to store the quantized pose
representation, allowing us to sample diverse head motions aligned with the
audio and the extracted style. Experiments demonstrate that our approach
surpasses state-of-theart methods in terms of both lip-synchronization and
stylized expression. Besides, we extend our SAAS to video-driven style editing
field and achieve satisfactory performance.Comment: 9 pages, 5 figures, conferenc
A hybrid single-mode laser based on slotted silicon waveguides
An InGaAsP-Si hybrid single-mode laser based on etched slots in silicon waveguides was demonstrated operating at 1543 nm. The InGaAsP gain structure was bonded onto a patterned silicon-on-insulator wafer by selective area metal bonding method. The mode-selection mechanism based on a slotted silicon waveguide was applied, in which the parameters were designed using the simulation tool cavity modeling framework. The III-V lasers employed buried ridge stripe structure. The whole fabrication process only needs standard photolithography and inductively coupled plasma etching technology, which reduces cost for ease in technology transfer. At room temperature, a single mode of 1543-nm wavelength at a threshold current of 21 mA with a maximum output power of 1.9 mW in continuous-wave regime was obtained. The side mode suppression ratio was larger than 35 dB. The simplicity and flexibility of the fabrication process and a low cost make the slotted hybrid laser a promising light source
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