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Data Analysis and Knowledge Discovery  2020, Vol. 4 Issue (11): 102-111    DOI: 10.11925/infotech.2096-3467.2020.0059
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Predicting Usefulness of Crowd Testing Reports with Deep Learning
Cai Jingxuan1,Wu Jiang1,2(),Wang Chengkun1
1School of Information Management, Wuhan University, Wuhan 430072, China
2Center for E-commerce Research and Development, Wuhan University, Wuhan 430072, China
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Abstract  

[Objective] This paper tries to predict the usefulness of crowd testing reports with author attributes, text features, and image features. [Methods] First, we adopted deep learning techniques to extract text and image features from crowd testing reports. Then, we constrcuted a prediction model with full-connected neural network. Third, we trained the new model with 80% of samples and different input combinations. Finally, we examined our model’s performance with the remaining samples. [Results] With the help of text or image features, the prediction accuracy of the model increased by 4.24% and 5.21%, respectively. Using both the text and image features, our model’s prediction accuracy increased by 6.96%. [Limitations] The extracted features of texts and images were not understandable and interpretable. Therefore, we cannot identify specific features represented by each layer of neural network in the model. [Conclusions] The proposed model with text and image features can effectively predict the usefulness of crowd testing reports.
Key words： Crowd Testing      Signal Theory      Deep Learning      Feature Extraction      Predictive Analysis     
Received: 15 January 2020      Published: 27 September 2020
ZTFLH:  G203  
Corresponding Authors: Wu Jiang     E-mail: jiangw@whu.edu.cn
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Jingxuan Cai
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Cite this article:

Cai Jingxuan,Wu Jiang,Wang Chengkun. Predicting Usefulness of Crowd Testing Reports with Deep Learning. Data Analysis and Knowledge Discovery, 2020, 4(11): 102-111.

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http://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/10.11925/infotech.2096-3467.2020.0059     OR     http://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/Y2020/V4/I11/102

维度 变量 说明 Obs Mean S.D. Max Min
因变量 Like 众测报告获得的点赞数 1 550 27.28 33.56 385 0
作者属性 Au_level 作者在平台上的等级 1 550 9.55 3.72 26 1
Au_article 作者在平台上发布的文章总数 1 550 24.57 31.18 246 1
Au_test 作者参与众测次数 1 550 5.10 4.82 114 1
Au_followed 作者关注数 1 550 911.74 1 486.37 10 620 0
Au_follower 作者粉丝数 1 550 57.02 66.68 1 225 0
产品属性 Prod_type 试用产品的类型（美妆护肤、美食、生活、服饰、电子产品、母婴） 1 550 - - - -
Prod_price 试用产品的价格 1 550 177.32 215.30 1 700 11.99
Prod_num 同时参与该商品众测人数 1 550 7.98 7.35 32 1
Variables Definitions and Descriptive Statistics
类别 内容 来源
用户词典 （1）产品及商家名称：美妆蛋、小白鞋、良品铺子等
（2）体验描述：沙漠皮、开箱、神器等
（3）网络用语及缩写：鸡冻、踩雷、轻奢等		 （1）网站中对众测商品的描述
（2）高频未分词
停词词典 （1）标点符号
（2）虚词
（3）表情
（4）其他无意义词语：哈哈等		 （1）哈尔滨工业大学停用词表
（2）高频无意义词
User Dictionary and Stop Words
Topic Perplexity of Crowd Testing Report
Extraction Process of Image Feature
Feature Integration (Model 4)
Model Construction
模型代码 特征组合 精确率 召回率 F1值 准确率
模型1 作者属性+产品属性 0.767 6 0.878 3 0.791 7 0.782 1
模型2 作者属性+产品属性+报告文本 0.862 4 0.840 3 0.809 9 0.824 5
模型3 作者属性+产品属性+报告图片 0.870 0 0.857 1 0.835 9 0.834 2
模型4 作者属性+产品属性+报告文本+报告图片 0.885 4 0.887 0 0.865 8 0.851 7
Model Performance
模型代码 图片预训练模型 精确率 召回率 F1值 准确率
模型3 VGG19 0.870 0 0.857 1 0.835 9 0.834 2
ResNet50 0.843 0 0.803 1 0.822 6 0.816 7
InceptionV3 0.504 1 0.941 9 0.670 1 0.512 3
NASNetMobile 0.795 2 0.792 3 0.779 0 0.768 8
模型4 VGG19 0.885 4 0.887 0 0.865 8 0.851 7
ResNet50 0.786 0 0.838 1 0.803 6 0.793 8
InceptionV3 0.859 8 0.806 7 0.831 6 0.831 3
NASNetMobile 0.885 0 0.745 5 0.801 1 0.810 5
Performance with Different Picture Pre-training Model
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