301 research outputs found
Research of E-Business Innovative Training based on CDIO Educational Philosophy
CDIO is on behalf of Conceive, Design, Implement and Operate. The carrier of CDIO engineering education philosophy is a project which allows students to take the initiative, practical, organic link between the curriculums for learning. E-Business specialty has a property combination of management and engineering. Therefore, with CDIO educational philosophy, to promote E-Business specialty and industry associated, to improve innovation and practical ability for Management talent for Applied, is the current employment situation and development trend of higher education, and a useful attempt to improve teaching quality construction. This paper analyzes of the current status of E-Business specialty and the implementation feasibility of E-Business specialty reform based on CDIO education,gives a innovative training model based on CDIO in Chengdu University of Information Technology
Learning Accurate Performance Predictors for Ultrafast Automated Model Compression
In this paper, we propose an ultrafast automated model compression framework
called SeerNet for flexible network deployment. Conventional
non-differen-tiable methods discretely search the desirable compression policy
based on the accuracy from exhaustively trained lightweight models, and
existing differentiable methods optimize an extremely large supernet to obtain
the required compressed model for deployment. They both cause heavy
computational cost due to the complex compression policy search and evaluation
process. On the contrary, we obtain the optimal efficient networks by directly
optimizing the compression policy with an accurate performance predictor, where
the ultrafast automated model compression for various computational cost
constraint is achieved without complex compression policy search and
evaluation. Specifically, we first train the performance predictor based on the
accuracy from uncertain compression policies actively selected by efficient
evolutionary search, so that informative supervision is provided to learn the
accurate performance predictor with acceptable cost. Then we leverage the
gradient that maximizes the predicted performance under the barrier complexity
constraint for ultrafast acquisition of the desirable compression policy, where
adaptive update stepsizes with momentum are employed to enhance optimality of
the acquired pruning and quantization strategy. Compared with the
state-of-the-art automated model compression methods, experimental results on
image classification and object detection show that our method achieves
competitive accuracy-complexity trade-offs with significant reduction of the
search cost.Comment: Accepted to IJC
Low Rank Directed Acyclic Graphs and Causal Structure Learning
Despite several important advances in recent years, learning causal
structures represented by directed acyclic graphs (DAGs) remains a challenging
task in high dimensional settings when the graphs to be learned are not sparse.
In particular, the recent formulation of structure learning as a continuous
optimization problem proved to have considerable advantages over the
traditional combinatorial formulation, but the performance of the resulting
algorithms is still wanting when the target graph is relatively large and
dense. In this paper we propose a novel approach to mitigate this problem, by
exploiting a low rank assumption regarding the (weighted) adjacency matrix of a
DAG causal model. We establish several useful results relating interpretable
graphical conditions to the low rank assumption, and show how to adapt existing
methods for causal structure learning to take advantage of this assumption. We
also provide empirical evidence for the utility of our low rank algorithms,
especially on graphs that are not sparse. Not only do they outperform
state-of-the-art algorithms when the low rank condition is satisfied, the
performance on randomly generated scale-free graphs is also very competitive
even though the true ranks may not be as low as is assumed
Identifying risk factors affecting exercise behavior among overweight or obese individuals in China
BackgroundThe disease burden caused by obesity has increased significantly in China. Less than 30% of those who are obese meet the weekly physical activity standards recommended by the WHO. Risk factors that influence exercise behavior in people with obesity remain unclear.MethodsBased on the survey from the Chinese General Social Survey program (CGSS) in 2017, 3,331 subjects were identified and enrolled in the univariate and multiple probit regression models. We aimed to identify the association between SRH and the exercise behavior of obese people and further explore the influencing factors of active physical activity in this group of people.ResultsThe proportion of active physical activity in obese people was 25%. Groups with better SRH, higher education and income were more likely to participate in sports. Obese people who lived in rural areas, were unmarried or divorced, or fell within the age range of 35–40 had a significantly lower percentage of engagement in active physical activity.ConclusionsThe proportion of people with obesity who meet the WHO recommendation for physical activity in China is not ideal. Health promotion programs for those who are obese need to be further strengthened and targeted, especially for rural areas, low-income families, and middle-aged obese people
Water-dispersible and quasi-superparamagnetic magnetite nanoparticles prepared in a weakly basic solution at the low synthetic temperature
Magnetite nanoparticles were prepared in a weakly basic solution at the low reaction temperature by the co-precipitation method. As a comparison, the oxidative precipitation method was also applied in this study. The structure, morphology, and other properties of the obtained samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscope (TEM), and thermogravimetric analysis (TGA). The above characterization data indicate that small size and narrow size distribution are found for magnetite nanoparticles prepared by the co-precipitation method. Further magnetic property and Zeta potential results illuminate that magnetite nanoparticles prepared by this method display a quasi-superparamagnetic property and a good dispersion in the aqueous solution. Based on the investigation results, the magnetite nanoparticles with a quasi-superparamagnetic property and a fine dispersion can be facilely prepared in a weakly basic solution at the low reaction temperature by the co-precipitation method
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