AsU-OSum: Aspect-augmented unsupervised opinion summarization     

《Information processing & management》2023,60(1):103138

Opinion summarization can facilitate user’s decision-making by mining the salient review information. However, due to the lack of sufficient annotated data, most of the early works are based on extractive methods, which restricts the performance of opinion summarization. In this work, we aim to improve the informativeness of opinion summarization to provide better guidance to users. We consider the setting with only reviews without corresponding summaries, and propose an aspect-augmented model for unsupervised abstractive opinion summarization, denoted as AsU-OSum. We first employ an aspect-based sentiment analysis system to extract opinion phrases from reviews. Then, we construct a heterogeneous graph consisting of reviews and opinion clusters as nodes, which is used to enhance the Transformer-based encoder–decoder framework. Furthermore, we design a novel cascaded attention mechanism to prompt the decoder to pay more attention to the aspects that are more likely to appear in summary. During training, we introduce a sentiment accuracy reward that further enhances the learning ability of our model. We conduct comprehensive experiments on the Yelp, Amazon, and Rotten Tomatoes datasets. Automatic evaluation results show that our model is competitive and performs better than the state-of-the-art (SOTA) models on some ROUGE metrics. Human evaluation results further verify that our model can generate more informative summaries and reduce redundancy.  相似文献   

The role of numerical and non-numerical ordering abilities in mathematics and reading in middle childhood     

《Contemporary educational psychology》2020

This study investigated whether different types of ordering skills were related to mathematics achievement in children (n = 100) in middle childhood, after the effects of age, socio-economic status, IQ, and processing speed were taken into account. The relations between ordering skills and magnitude processing were also investigated, as well as the possibility that some of the shared variance between math and reading is explained by ordering abilities. The ordering tasks included the ordering of familiar numerical and non-numerical sequences, a parental report of children’s everyday ordering skills, and an order working memory task. Three magnitude processing tasks (symbolic and non-symbolic comparison and number line estimation), were also administered, as well as measures of inhibition and spatial working memory. From this set of measures, number ordering, order working memory and number line estimation emerged as the most important predictors of mathematics skills. We found that number ordering mediated the effect of both symbolic and non-symbolic comparison skills on mathematics, further confirming that this task captures some essential skills related to mathematics. Additionally, order working memory mediated the effect of both number comparison and reading skills on math. Finally, whereas non-symbolic comparison and number line estimation are considered important indicators of magnitude processing skills, there was no relationship between these abilities, but there was a correlation between each of these abilities and reading skills, with number line estimation also mediating the effect of reading skills on math. These novel findings could contribute to a better understanding of the basic processes underlying math ability, and why math and reading are strongly related in typical populations and in children with learning difficulties.  相似文献   

柠条生物特性测定分析与机械加工利用技术   总被引：3，自引：0，他引：3  

陶维华  杨朝晖  白世军 《科技成果管理与研究》2010,(3):63-65

柠条是豆科锦鸡儿属的一种,是多年生强旱生沙生落叶灌木,林草兼用。通过对柠条生物特性的测定分析,为柠条的高效利用提供了一定的参考。  相似文献   

从专利情况看石油加工领域的技术创新能力     

杨木容  陈小平 《科技管理研究》2010,30(19)

通过国家知识产权局的专利数据库查找我国石油加工领域的专利数据,并对这些专利数据的年度分布和地区分布情况进行整理分析,另外还以广东省的石油加工专利数据为例,阐述广东省的石油加工专利信息的特点.最后提出提高我国石油加工技术创新能力的建议.  相似文献   

基于低采样率数字去斜的合成孔径激光雷达成像处理     

胡烜  李道京  周建卫 《中国科学院大学学报》2016,33(5):664-668

将低采样率数字去斜技术用于合成孔径激光雷达（SAL）,大幅度降低了系统的AD采样率.在此基础上,分析线性调频连续波（LFMCW）体制SAL系统的信号采样和成像处理问题.为降低回波延时误差带来的影响,给出一种延时估计方法.该方法通过截取单个扫频周期信号的回波进行去斜脉压,得到场景对应的延时;针对线性调频（LFM）信号的非线性失真,使用剩余视频相位（RVP）滤波法进行信号校正,保证去斜脉压质量.仿真实验验证了将低采样率数字去斜应用于SAL的可行性.  相似文献   

亚洲金融危机对中国外贸出口的影响及对策     

胡康成 《上海海事大学学报》1999,(2)

从近两年中国外贸出口的有关数据对比出发,分析了亚洲金融危机对中国外贸的影响,并针对这些影响剖析了中国外贸在出口商品结构、出口市场、外贸企业等方面存在的缺陷,对如何进一步搞好外贸出口提出了一些建议。  相似文献   

自闭症谱系障碍个体社会奖赏加工缺陷的神经机制     

徐慧  黄俊  王滔 《中国特殊教育》2021,(3):39-45

自闭症谱系障碍(ASD)是一种以社会交往障碍为主要特征的神经发育障碍,ASD的社会交往障碍与社会动机的缺乏有关,主要表现为社会奖赏加工缺陷.已有的神经影像学、脑电成分和神经化学成分的研究从神经机制上揭示了ASD个体的社会奖赏加工存在缺陷,并且该缺陷发生在奖赏预期阶段,但其非社会奖赏加工能力和奖赏加工阶段是否也存在缺陷没...  相似文献   

Expedited digital appraisal for regular archivists: an MPLP-type approach     

Susanne Belovari 《Journal Of Archival Organization》2017,14(1-2):55-77

Working with a German state archives, the author developed a MPLP approach to digital appraisal/processing. Testing 10 deduplication software (80% failed), she selected a user friendly and inexpensive software. She appraised 670?GB in four days and developed a simple workflow of broad and in-depth qualitative appraisal. The author highlights the importance of appraisal factors, presents a list of desirable software features, and calls for the establishment of peer-reviewed online testing sites administered by archival organizations.  相似文献   

载波测量技术在DGPS中的应用     

吴鹏 《上海海事大学学报》1993,(1)

本文介绍了采用伪距差转的DGPS工作原理,说明了在DGPS中利用载波测量信息的重要性和方法以及对伪距测量精度的改善程度,并对实际使用中应注意的问题及解决方法作了比较深入的探讨。  相似文献   

层次分析法在物流企业仓库选址中的运用     

陈炜  奚立峰 《上海海事大学学报》2002,23(3):54-57

物流市场竞争的加剧要求企业经营者不断提高物流服务质量以加强企业竞争力。仓库选址作为物流企业提高物流服务质量的战略决策 ,需要企业决策者综合考虑地理条件、顾客、管理等因素后迅速作出判断。这是一项复杂的任务。层次分析法 (AHP)是一种利用专家经验将定性的综合判断转化为具体的定量判定的方法。运用AHP ,可以对物流企业的仓库选点和战略决策提供比建立数学模型更方便可行的分析方法。  相似文献