153 research outputs found
Long time behaviors for the inhomogeneous NLS with a potential in
In this article, we aim to study the scattering of the solution to the
focusing inhomogeneous nonlinear Schr\"odinger equation with a potential of
form \begin{align*}
i\partial_t u+\Delta u- Vu=-|x|^{-b}|u|^{p-1}u \end{align*} in the energy
space . We prove a scattering criterion, and then we use it together
with Morawetz estimate to show the scattering theory, which generalizes the
results of Dinh \cite{DD} to the non-radial symmetric case.Comment: In this version, we correct some mistakes and change the titl
Evaluation of anti-smoking television advertising on tobacco control among urban community population in Chongqing, China
Background
China is the largest producer and consumer of tobacco in the world. Considering the constantly growing urban proportion, persuasive tobacco control measures are important in urban communities. Television, as one of the most pervasive mass media, can be used for this purpose.
Methods
The anti-smoking advertisement was carried out in five different time slots per day from 15 May to 15 June in 2011 across 12 channels of Chongqing TV. A cross-sectional study was conducted in the main municipal areas of Chongqing. A questionnaire was administered in late June to 1,342 native residents aged 18–45, who were selected via street intercept survey.
Results
Respondents who recognized the advertisement (32.77 %) were more likely to know or believe that smoking cigarettes caused impotence than those who did not recognize the advertisement (26.11 %). According to 25.5 % of smokers, the anti-smoking TV advertising made them consider quitting smoking. However, females (51.7 %) were less likely to be affected by the advertisement to stop and think about quitting smoking compared to males (65.6 %) (OR = 0.517, 95 % CI [0.281–0.950]). In addition, respondents aged 26–35 years (67.4 %) were more likely to try to persuade others to quit smoking than those aged 18–25 years (36.3 %) (OR = 0.457, 95 % CI [0.215–0.974]). Furthermore, non-smokers (87.4 %) were more likely to find the advertisement relevant than smokers (74.8 %) (OR = 2.34, 95 % CI [1.19–4.61]).
Conclusions
This study showed that this advertisement did not show significant differences on smoking-related knowledge and attitude between non-smokers who had seen the ad and those who had not. Thus, this form may not be the right tool to facilitate change in non-smokers. The ad should instead be focused on the smoking population. Gender, smoking status, and age influenced the effect of anti-smoking TV advertising on the general population in China
Regional Differential Information Entropy for Super-Resolution Image Quality Assessment
PSNR and SSIM are the most widely used metrics in super-resolution problems,
because they are easy to use and can evaluate the similarities between
generated images and reference images. However, single image super-resolution
is an ill-posed problem, there are multiple corresponding high-resolution
images for the same low-resolution image. The similarities can't totally
reflect the restoration effect. The perceptual quality of generated images is
also important, but PSNR and SSIM do not reflect perceptual quality well. To
solve the problem, we proposed a method called regional differential
information entropy to measure both of the similarities and perceptual quality.
To overcome the problem that traditional image information entropy can't
reflect the structure information, we proposed to measure every region's
information entropy with sliding window. Considering that the human visual
system is more sensitive to the brightness difference at low brightness, we
take quantization rather than linear quantization. To accelerate the
method, we reorganized the calculation procedure of information entropy with a
neural network. Through experiments on our IQA dataset and PIPAL, this paper
proves that RDIE can better quantify perceptual quality of images especially
GAN-based images.Comment: 8 pages, 9 figures, 4 table
Fossil Image Identification using Deep Learning Ensembles of Data Augmented Multiviews
Identification of fossil species is crucial to evolutionary studies. Recent
advances from deep learning have shown promising prospects in fossil image
identification. However, the quantity and quality of labeled fossil images are
often limited due to fossil preservation, conditioned sampling, and expensive
and inconsistent label annotation by domain experts, which pose great
challenges to the training of deep learning based image classification models.
To address these challenges, we follow the idea of the wisdom of crowds and
propose a novel multiview ensemble framework, which collects multiple views of
each fossil specimen image reflecting its different characteristics to train
multiple base deep learning models and then makes final decisions via soft
voting. We further develop OGS method that integrates original, gray, and
skeleton views under this framework to demonstrate the effectiveness.
Experimental results on the fusulinid fossil dataset over five deep learning
based milestone models show that OGS using three base models consistently
outperforms the baseline using a single base model, and the ablation study
verifies the usefulness of each selected view. Besides, OGS obtains the
superior or comparable performance compared to the method under well-known
bagging framework. Moreover, as the available training data decreases, the
proposed framework achieves more performance gains compared to the baseline.
Furthermore, a consistency test with two human experts shows that OGS obtains
the highest agreement with both the labels of dataset and the two experts.
Notably, this methodology is designed for general fossil identification and it
is expected to see applications on other fossil datasets. The results suggest
the potential application when the quantity and quality of labeled data are
particularly restricted, e.g., to identify rare fossil images.Comment: preprint submitted to Methods in Ecology and Evolutio
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