A Hybrid Recommendation Model Based on Time Dimension for Academic Teams

Author(s):  
Yong Tang ◽  
Jihong Lin ◽  
Hanlu Chu ◽  
Junyi He ◽  
Fengjie Luo
2013 ◽  
Vol 655-657 ◽  
pp. 1765-1769
Author(s):  
Hong Zou ◽  
Tian Wang ◽  
Li Hao Wei ◽  
Lei Cui

With the rapid expansion of negative information in the Internet, the content rating technology is developed. This paper proposed a rating supervision model based on content rating considering trust model. We firstly analyze the behavior and reputation of network entities from the following dimensions: data dimension, time dimension and application dimension, and then applied artificial neural network to construct the trust model referred to the trust relationship in human society network. At last, we proposed the rating supervision model based on the trust model. It is proved that the rating supervision model can not only meet the standard of PICS, but also take the behavior and reputation of network entities into consideration. As a result, the rating supervision model can provide a variety of security services to enhance the credibility of the information by combination of rating label and network entity reputation.


2018 ◽  
Vol 173 ◽  
pp. 03069
Author(s):  
Wang Tan ◽  
Qianqian Yang ◽  
Rencong Nie

Objective To study the trend of cycle activity of measles epidemic from 1950 to 2014 and establish a model to predict the national incidence of measles in the future. Methods Using the national measles monitoring data from 1950 to 2014, we establish a information database. Then, we set up the wavelet analysis model based on Hilbert transform to study the cycle of measles incidence. Finally, we establish the ARIMA model of measles risk level to predict the incidence of measles by SPSS software. Results Wavelet analysis shows that the outbreak cycle of the incidence of measles is getting longer in the time dimension. ARIMA model analysis shows that national incidence of measles will fluctuate and decline in the next 36 years, which is may related to the improvement of medical standards and people’s awareness of the measles prevention. Conclusions The national incidence of measles is declining. It is cyclical and its outbreak cycle is getting longer. Data shows that the incidence of measles will gradually decrease in the future, and gradually achieve the global goal of eliminating measles.


Author(s):  
Liang Jiang ◽  
Lu Liu ◽  
Jingjing Yao ◽  
Leilei Shi

Abstract The recommendation system is an effective means to solve the information overload problem that exists in social networks, which is also one of the most common applications of big data technology. Thus, the matrix decomposition recommendation model based on scoring data has been extensively studied and applied in recent years, but the data sparsity problem affects the recommendation quality of the model. To this end, this paper proposes a hybrid recommendation model based on deep emotion analysis and multi-source view fusion which makes a personalized recommendation with user-post interaction ratings, implicit feedback and auxiliary information in a hybrid recommendation system. Specifically, the HITS algorithm is used to process the data set, which can filter out the users and posts with high influence and eliminate most of the low-quality users and posts. Secondly, the calculation method of measuring the similarity of candidate posts and the method of calculating K nearest neighbors are designed, which solves the problem that the text description information of post content in the recommendation system is difficult to mine and utilize. Then, the cooperative training strategy is used to achieve the fusion of two recommended views, which eliminates the data distribution deviation added to the training data pool in the iterative training. Finally, the performance of the DMHR algorithm proposed in this paper is compared with other state-of-art algorithms based on the Twitter dataset. The experimental results show that the DMHR algorithm has significant improvements in score prediction and recommendation performance.


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