An analysis of review content and reviewer variables that contribute to review helpfulness     

MSI Malik  Ayyaz Hussain 《Information processing & management》2018,54(1):88-104

Review helpfulness is attracting increasing attention of practitioners and academics. It helps in reducing risks and uncertainty faced by users in online shopping. This study examines uninvestigated variables by looking at not only the review characteristics but also important indicators of reviewers. Several significant review content and two reviewer variables are proposed and an effective review helpfulness prediction model is built using stochastic gradient boosting learning method. This study derived a mechanism to extract novel review content variables from review text. Six popular machine learning models and three real-life Amazon review data sets are used for analysis. Our results are robust to several product categories and along three Amazon review data sets. The results show that review content variables deliver the best performance as compared to the reviewer and state-of-the-art baseline as a standalone model. This study finds that reviewer helpfulness per day and syllables in review text strongly relates to review helpfulness. Moreover, the number of space, aux verb, drives words in review text and productivity score of a reviewer are also effective predictors of review helpfulness. The findings will help customers to write better reviews, help retailers to manage their websites intelligently and aid customers in their product purchasing decisions.  相似文献   

约束线性方程组唯一解的Cramer法则     

刘桂香  张春平 《扬州教育学院学报》2001,19(3):1-3

A∈Cmxn,T为Cn的子空间.本文给出了约束线性方程组Ax=b(x∈T)的唯一解的Cramer法则,同时也给出了一些相容或不相容线性方程组在一定意义下解的Cramer法则.  相似文献   

期待翻译软件的新突破   总被引：3，自引：0，他引：3  

葛敬民 《现代图书情报技术》2002,18(1):78-79

因特网已渗透到人们的衣食住行及社会生活各个方面, 虽然网络没有国界, 信息不分种族, 但80% 的网站和90% 的网络信息是英文的, 多数国人与世界交流受到语障制约。国家科委早已将机器翻译列入“863”计划, 近年来翻译软件成果累累, 只是这些成果与人们的要求尚有较大距离, 此项研究仍然任重道远。  相似文献   

Internet信息检索分析与研究   总被引：7，自引：0，他引：7  

宋玲  马军 《现代图书情报技术》2001,17(1):37-40

综述了目前Internet 网上信息检索的主要方法及存在的问题, 并对其检索技术进行了深入的分析与比较。介绍了机器学习、智能A gent、信息过滤等新技术在信息检索中的应用, 并采用神经网络Hopfield 模型及算法进行词汇扩充来提高用户的检索提问表达, 从而提高了网上信息检索的能力。  相似文献   

翻译记忆(TM)——计算机翻译技术的新发展     

王金铨 《现代图书情报技术》2004,20(5):13-16

机器翻译(MT ) 和机器辅助翻译(CAT ) 是两个既有联系又有着本质区别的概念。本文回顾了机器翻译的历史, 比较了机器翻译和机器辅助翻译各自的特点, 着重论述了翻译记忆软件的工作原理、特点及其应用。  相似文献   

基于机器学习的自动文本分类模型研究   总被引：2，自引：0，他引：2  

陈立孚  周宁  李丹 《现代图书情报技术》2005,21(10):23-27

基于机器学习的方法是自动文本分类中非常重要的一大类方法。本文先给出了形式化的定义，提出了自动文本分类的流程模型，然后选取了支持向量机（Support Vector Machine，SVM）算法作为一个典型例子进行分析，最后作者通过一个中文文本分类实验评价了该算法的效果。  相似文献   

517字段用法争议分析     

常雅红 《图书馆杂志》2018,(1):79-83

  相似文献   

Multimodal data as a means to understand the learning experience     

《International Journal of Information Management》2019

Most work in the design of learning technology uses click-streams as their primary data source for modelling & predicting learning behaviour. In this paper we set out to quantify what, if any, advantages do physiological sensing techniques provide for the design of learning technologies. We conducted a lab study with 251 game sessions and 17 users focusing on skill development (i.e., user's ability to master complex tasks). We collected click-stream data, as well as eye-tracking, electroencephalography (EEG), video, and wristband data during the experiment. Our analysis shows that traditional click-stream models achieve 39% error rate in predicting learning performance (and 18% when we perform feature selection), while for fused multimodal the error drops up to 6%. Our work highlights the limitations of standalone click-stream models, and quantifies the expected benefits of using a variety of multimodal data coming from physiological sensing. Our findings help shape the future of learning technology research by pointing out the substantial benefits of physiological sensing.  相似文献   

矩形截面纤维流场压降及细颗粒扩散捕集效率     

黄浩凯  赵海波 《中国科学院大学学报》2017,34(2):210-217

采用格子波尔兹曼气固两相流模型模拟扩散机制下矩形纤维捕集颗粒过程，研究纤维周围流场压降和扩散捕集效率随不同纤维布置方式的变化规律。把模拟得到的值（系统压降与捕集效率）与相同体积分数的圆柱纤维所对应的理论值相比，得到相应比例系数。分析规律，并采用Levenberg-Marquardt方法对其进行处理，得到相应比例系数的拟合公式。根据已有的圆形纤维压降与扩散效率的理论公式，再结合求得的拟合公式，对不同工况下的矩形纤维系统压降和扩散捕集效率进行计算。分析结果发现：矩形纤维系统压降与放置角度和长宽比均相关；而扩散捕集效率与长宽比成正比，与放置角度基本无关。  相似文献   

Correlation analysis-based image segmentation approach for automatic agriculture vehicle   总被引：1，自引：0，他引：1  

张方明应义斌  蒋焕煜SHIN Beom-soo 《浙江大学学报(A卷英文版)》2005,6(10):1158-1162

INTRODUCTION In recent years,harvesting crop by combine has become more and more popular in China.In2003,combines were used to harvest23%of rice and71%of wheat.The work described here is part of a pro-ject aimed at researching automatic combines who follow the cut-uncut edge of the crops automatically to reduce the driver’s fatigue from the intensive work.Much attention has been focused on vision-bas-ed automatic agriculture vehicle.Image segmenta-tion is the key to extracting the guida…  相似文献