1,350 research outputs found
Semantic Segmentation Using Super Resolution Technique as Pre-Processing
Combining high-level and low-level visual tasks is a common technique in the
field of computer vision. This work integrates the technique of image super
resolution to semantic segmentation for document image binarization. It
demonstrates that using image super-resolution as a preprocessing step can
effectively enhance the results and performance of semantic segmentation
Knowledge Representing: Efficient, Sparse Representation of Prior Knowledge for Knowledge Distillation
Despite the recent works on knowledge distillation (KD) have achieved a
further improvement through elaborately modeling the decision boundary as the
posterior knowledge, their performance is still dependent on the hypothesis
that the target network has a powerful capacity (representation ability). In
this paper, we propose a knowledge representing (KR) framework mainly focusing
on modeling the parameters distribution as prior knowledge. Firstly, we suggest
a knowledge aggregation scheme in order to answer how to represent the prior
knowledge from teacher network. Through aggregating the parameters distribution
from teacher network into more abstract level, the scheme is able to alleviate
the phenomenon of residual accumulation in the deeper layers. Secondly, as the
critical issue of what the most important prior knowledge is for better
distilling, we design a sparse recoding penalty for constraining the student
network to learn with the penalized gradients. With the proposed penalty, the
student network can effectively avoid the over-regularization during knowledge
distilling and converge faster. The quantitative experiments exhibit that the
proposed framework achieves the state-ofthe-arts performance, even though the
target network does not have the expected capacity. Moreover, the framework is
flexible enough for combining with other KD methods based on the posterior
knowledge
Updated constraints on Georgi-Machacek model, and its electroweak phase transition and associated gravitational waves
With theoretical constraints such as perturbative unitarity and vacuum
stability conditions and updated experimental data of Higgs measurements and
direct searches for exotic scalars at the LHC, we perform an updated scan of
the allowed parameter space of the Georgi-Machacek (GM) model. With the refined
global fit, we examine the allowed parameter space for inducing strong
first-order electroweak phase transitions (EWPTs) and find only the one-step
phase transition is phenomenologically viable. Based upon the result, we study
the associated gravitational wave (GW) signals and find most of which can be
detected by several proposed experiments. We also make predictions on processes
that may serve as promising probes to the GM model in the near future at the
LHC, including the di-Higgs productions and several exotic scalar production
channels.Comment: 42 pages, 11 figures, 9 table
Identification of Postoperative Prognostic MicroRNA Predictors in Hepatocellular Carcinoma
Comparison of microRNA (miRNA) expression profiles in the noncancerous liver tissues adjacent to hepatocelluar carcinomas (HCCs) was a strategy to identify postoperative prognostic predictors in this study. Expression profiles of 270 miRNAs were determined in the paraneoplastic liver tissues of 12 HCC patients with known postoperative prognosis. A panel of candidate miRNA predictors was identified. The prognostic predictive value of these candidate miRNAs was then verified in 216 postoperative HCC patients. Univariate analysis identified 8 and 3 miRNA predictors for recurrence-free (RFS) and overall (OS) survivals, respectively. Multivariate analysis revealed high expression levels of miR-155 (HR, 2.002 [1.324β3.027]; Pβ=β.001), miR-15a (HR, 0.478 [0.248β0.920]; Pβ=β.027), miR-432 (HR, 1.816 [1.203β2.740]; Pβ=β.015), miR-486-3p (HR, 0.543 [0.330β0.893]; Pβ=β.016), miR-15b (HR, 1.074 [1.002β1.152]; Pβ=β.043) and miR-30b (HR, 1.102 [1.025β1.185]; Pβ=β.009) were significantly associated with RFS. When clinicopathological predictors were included, multivariate analysis revealed that tumor number and miR-432, miR-486-3p, and miR-30b expression levels remained significant as independent predictors for RFS. Additionally, expression knockdown of miR-155 in J7 and Mahlavu hepatoma cells resulted in decreased cell growth and enhanced cell death in xenograft tumors, suggesting an oncogenic effect of miR-155. In conclusion, significant prognostic miRNA predictors were identified through examination of miRNA expression levels in paraneoplastic liver tissues. Functional analysis of a miRNA predictor, miR-155, suggested that the prognostic miRNA predictors identified under this strategy could serve as potential molecular targets for anticancer therapy
Functional Form and Spatial Dependence in Dynamic Panels
Wharton-SMU Research Centr
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