scholarly journals A novel dissolved oxygen prediction model based on enhanced semi-naive Bayes for ocean ranches in northeast China

2021 ◽  
Vol 7 ◽  
pp. e591
Author(s):  
Jiajun Sun ◽  
Dashe Li ◽  
Deming Fan

A challenge of achieving intelligent marine ranching is the prediction of dissolved oxygen (DO). DO directly reflects marine ranching environmental conditions. Through accurate DO predictions, timely human intervention can be made in marine pasture water environments to avoid problems such as reduced yields or marine crop death due to low oxygen concentrations in the water. We use an enhanced semi-naive Bayes model for prediction based on an analysis of DO data from marine pastures in northeastern China from the past three years. Based on the semi-naive Bayes model, this paper takes the possible values of a DO difference series as categories, counts the possible values of the first-order difference series and the difference series of the interval before each possible value, and selects the most probable difference series value at the next moment. The prediction accuracy is optimized by adjusting the attribute length and frequency threshold of the difference sequence. The enhanced semi-naive Bayes model is compared with LSTM, RBF, SVR and other models, and the error function and Willmott’s index of agreement are used to evaluate the prediction accuracy. The experimental results show that the proposed model has high prediction accuracy for DO attributes in marine pastures.

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 217917-217927
Author(s):  
Dashe Li ◽  
Jiajun Sun ◽  
Huanhai Yang ◽  
Xueying Wang

2012 ◽  
Vol 6-7 ◽  
pp. 576-582
Author(s):  
Ping Li ◽  
Ming Liang Cui ◽  
Zhen Shan Hou ◽  
Liu Liu Wei ◽  
Wen Hao Ying ◽  
...  

Session segmentation can not only contribute a lot to the further and deeper analysis of user’s search behavior but also act as the foundation of other retrieval process researches based on users’ complicated search behaviors. This paper proposes a session boundary discrimination model utilizing time interval and query likelihood on the basis of Naive Bayes Model. Compared with previous study, the model proposed in this paper shows a prominent improvement through experiment in three aspects, which is: recall ratio, precision ratio and value F. Owing to its advantage in session boundary discrimination, the application of the model can serve as a tool in fields like personalized information retrieval, query suggestion, search activity analysis and other fields which is related to search results improvement.


2020 ◽  
Vol 541 ◽  
pp. 316-331
Author(s):  
Si-Yuan Liu ◽  
Jing Xiao ◽  
Xiao-Ke Xu

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Mengmeng Wang ◽  
Wanli Zuo ◽  
Ying Wang

Today microblogging has increasingly become a means of information diffusion via user’s retweeting behavior. Since retweeting content, as context information of microblogging, is an understanding of microblogging, hence, user’s retweeting sentiment tendency analysis has gradually become a hot research topic. Targeted at online microblogging, a dynamic social network, we investigate how to exploit dynamic retweeting sentiment features in retweeting sentiment tendency analysis. On the basis of time series of user’s network structure information and published text information, we first model dynamic retweeting sentiment features. Then we build Naïve Bayes models from profile-, relationship-, and emotion-based dimensions, respectively. Finally, we build a multilayer Naïve Bayes model based on multidimensional Naïve Bayes models to analyze user’s retweeting sentiment tendency towards a microblog. Experiments on real-world dataset demonstrate the effectiveness of the proposed framework. Further experiments are conducted to understand the importance of dynamic retweeting sentiment features and temporal information in retweeting sentiment tendency analysis. What is more, we provide a new train of thought for retweeting sentiment tendency analysis in dynamic social networks.


2012 ◽  
Vol 19B (3) ◽  
pp. 195-200
Author(s):  
Jae-Hoon Kim ◽  
Kil-Ho Jeon

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 57868-57880 ◽  
Author(s):  
Longjie Li ◽  
Shijin Xu ◽  
Mingwei Leng ◽  
Shiyu Fang ◽  
Xiaoyun Chen

Author(s):  
Neeraj Saxena ◽  
Ruiyang Wang ◽  
Vinayak V. Dixit ◽  
S. Travis Waller

Driving in congested traffic is a nuisance that not only results in longer travel times, but also triggers frustration and impatience among drivers. A few studies have modeled the effects of congested traffic in the resulting route choice behavior of car drivers. The studies used frequentist models such as discrete choice models to analyze large samples. However, these studies did not compare the inferences obtained from the frequentist and Bayesian approaches, particularly for datasets which are not sufficiently large. It has been shown by researchers that Bayesian models perform well, especially when the sample size is small. Thus, this paper develops and compares a multinomial logit (frequentist) and a Naïve Bayes (Bayesian) model on a mid-sized dataset of size around 100 participants which was obtained from a driving simulator experiment to understand driver’s route choice under stop-and-go traffic. The results show that the prediction power of the Naïve Bayes model is much higher than the multinomial logit model (MNL). The Naïve Bayes model is also found to perform better than machine learning algorithms like the decision tree model. The findings from this study will be useful to researchers and practitioners as they should test both the approaches and select the appropriate model, particularly in the case of seemingly large datasets.


Author(s):  
Patrick N. Mwaro ◽  
Dr. Kennedy Ogada ◽  
Prof. Wilson Cheruiyot

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