期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Effects of PM2.5 Exposure in Different Air Quality Grades on Daily Outpatient Visits for Childhood Asthma in Shijiazhuang, China 被引量:8
1
作者 FU Gui Qin JIANG Yan Feng +4 位作者 LIU Lan Ping LIU Hua Yue ZHOU Ji CUI Xiao Wei WANG Shi Gong 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2018年第12期888-892,共5页
Asthma is a common chronic inflammatory disorder that is more prevalent in children than in adults.China has seen an increasing prevalence of childhood asthma in recentdecades[1].Earlier studies have shown that air pa... Asthma is a common chronic inflammatory disorder that is more prevalent in children than in adults.China has seen an increasing prevalence of childhood asthma in recentdecades[1].Earlier studies have shown that air particulate matter (PM),particularly fine particulate matter(PM2.5)[2],is an important factor triggering childhood asthma. Since nationalPM2.5data were nota vailabl euntil 2013, 展开更多
关键词 Effects of PM China Exposure in different Air Quality grades on Daily Outpatient Visits for Childhood Asthma in Shijiazhuang
在线阅读 下载PDF
Research on Emotional Expression of Students in Different School Stages Based on Speech Emotion Recognition
2
作者 Qianwen Yuan Yujie Chen Wei Wang 《Journal of Psychological Research》 2025年第3期9-20,共12页
From children to teenagers and then to adults,individuals’emotional expression ability has undergone significant changes.From the compulsory education stage to the general senior middle school stage,students’cogniti... From children to teenagers and then to adults,individuals’emotional expression ability has undergone significant changes.From the compulsory education stage to the general senior middle school stage,students’cognitive and emotional needs will change greatly.Students of different school stages show significant differences in their vocal emotional expression,which not only affects their social skills but also has important guiding significance for educational practice.Therefore,this study focuses on the vocal emotional expression of students at different school stages.This study explores the differences in vocal emotional expression among students at different school stages(primary school,junior high school,and senior high school),with a focus on the expression characteristics of different emotional types and the situation of inconsistent internal and external emotions.The research results show that in terms of emotional types,students at different school stages have a relatively high accuracy rate in expressing sadness,while the accuracy rate for expressing anger is the lowest,and the accuracy rate for expressing anger is significantly lower than that for other emotions.In terms of school stages,the overall accuracy of emotional expression among students improves with the increase of school stages,but the differences between school stages are not significant.In the task of expressing inconsistent internal and external emotions,the study found that senior high school students have significantly better emotional conversion ability than primary and junior high school students,indicating that as the school stage increases,students’adaptability in complex emotional expression tasks gradually improves. 展开更多
关键词 Voice Emotional Expression grade Differences Types of Emotions
在线阅读 下载PDF
混合微分求积法在功能梯度材料平板柱形弯曲问题中的应用
3
作者 张纯 仲政 《力学季刊》 CSCD 北大核心 2006年第4期668-674,共7页
利用混合微分求积法,对任意荷载作用下不同材料梯度分布的功能梯度材料平板柱形弯曲问题进行了分析。针对广义微分求积法求解集中荷载问题精度不高的缺点,本文利用小波微分求积法进行了改进。由于小波对突变信号具有良好的自适应描述能... 利用混合微分求积法,对任意荷载作用下不同材料梯度分布的功能梯度材料平板柱形弯曲问题进行了分析。针对广义微分求积法求解集中荷载问题精度不高的缺点,本文利用小波微分求积法进行了改进。由于小波对突变信号具有良好的自适应描述能力,因此在平板宽度方向上,利用小波微分求积法可以有效地处理集中荷载;而在材料梯度变化的板厚方向上,则利用广义微分求积法计算量小且精度高的特点进行离散计算。计算表明,混合微分求积法不仅保留了广义微分求积法高效的特点,而且能有效地求解任意荷载作用的问题。通过算例,分析了在机械荷载作用下,材料不同梯度形式、平板上下表面材料性质差异对功能梯度平板结构响应的影响。 展开更多
关键词 功能梯度材料 平板 柱形弯曲 小波微分求积法 广义微分求积法
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部