安徽怀远话声韵调之研究

怀远话属江淮官话，但是由于地理位置的特殊，又具有一定的过渡性。怀远话的声韵调系统中，有声母20个，韵母36个，声调5个。对怀远话的声韵调系统进行描写分析，不仅可以明确怀远话的声韵调与普通话的对应关系，而且有助于方言研究和推广普通话。     

变频调速技术在泵、风机上的节能应用分析

泵、风机类负栽通常采用鼠笼式异步电动机拖动，恒速运行。需要调节流量、风量时，常采用阀门或挡板进行调节，节流损失非常大。采用变频调速系统后，泵、风机可变速运行，节能效果十分显著，是一项值得推广的技术。     

Student Perceptions of Chemistry Laboratory Learning Environments, Student–Teacher Interactions and Attitudes in Secondary School Gifted Education Classes in Singapore

This study investigated the chemistry laboratory classroom environment, teacher–student interactions and student attitudes towards chemistry among 497 gifted and non-gifted secondary-school students in Singapore. The data were collected using the 35-item Chemistry Laboratory Environment Inventory (CLEI), the 48-item Questionnaire on Teacher Interaction (QTI) and the 30-item Questionnaire on Chemistry-Related Attitudes (QOCRA). Results supported the validity and reliability of the CLEI and QTI for this sample. Stream (gifted versus non-gifted) and gender differences were found in actual and preferred chemistry laboratory classroom environments and teacher–student interactions. Some statistically significant associations of modest magnitude were found between students' attitudes towards chemistry and both the laboratory classroom environment and the interpersonal behaviour of chemistry teachers. Suggestions for improving chemistry laboratory classroom environments and the teacher–student interactions for gifted students are provided.     

A women's scientific society in the west. The late eighteenth-century assimilation of science

The Natuurkundig Genootschap der Dames (Women's Society for Natural Knowledge), formally established by and for women, met regularly from 1785 to 1881 and sporadically until 1887. It challenges our stereotypes both of women and the physical sciences during the eighteenth century and of the intellectual interests open to women in the early European republics. This essay aims not simply to identify the society and its members but to describe their pursuits and consider what their story adds to the history of Western science. What does this society's existence tell us about the relationship between women and early science in general and about science and society in the Dutch setting in particular? Science and gender look rather different when observed through the activities of the immensely prosperous women of Middelburg, citizens of one of the most highly literate Western countries. The elite lives of the first-generation members of the women's society also offer us a glimpse into the early domestication of science, a process vital to its acceptance and assimilation.     

中国精准扶贫的区域治理思想解析

中国精准扶贫精准脱贫方略的伟大实践促进了区域贫困治理思想的不断完善。本文在总结个体扶贫与区域扶贫的辩证关系、贫困区域与区域贫困治理需求的基础上,基于中国精准扶贫实践中的具体做法,系统梳理了贫困区域治理思想,旨在丰富精准扶贫理论体系,为中国的乡村振兴战略实施及全球2030年减贫目标的国际行动提供参考。主要结论为：区域贫困治理思想包括贫困空间分异、贫困区域开发策略和贫困区域管理3个方面,与精准扶贫方略服务于精准扶贫的“精准识别、精准帮扶、精准管理”,为精准扶贫提供了理论基础与实践工具;依据贫困区域在空间上呈现显著差异和空间分异特征,以此划分出贫困县域类别、村域类别,并把脱贫难度大、贫困县集中的地区划为集中连片特困地区;基于资源学、地理学等学科的区域开发与发展理论,形成了以东西协作对口支援、农业农村优先发展以及因地制宜分类施策组成的区域贫困开发策略;依据贫困区域的鲜明层级体系,构建了“贫困县—贫困村—贫困户”扶贫对象体系和退出考核评估机制,以及“中央统筹、省负总责、市县抓落实”的工作机制组成的贫困区域管理手段。     

科学研究的合作化趋势——对我国部分环境科学期刊合作论文的实证研究

在当今科学研究活动中,各种形工的合作正变得非常普遍,环境科学是跨学科的综合性交叉学科群组,通过对我国部分环境科学期刊论文合作情况的计量分析,初步得到合作研究的特点。     

视频信息检索技术的发展及应用

今天视频检索的重要性已经越来越被人们所重视。本文总结了视频信息检索技术的发展历程、技术特点及国内外应用现状，最后预测了未来的发展趋势。