线切割电参数的合理选择     

陈德航 《四川职业技术学院学报》2006,16(2):115-116

分析了线切割参数对线切割加工工艺指标的影响,指明了怎样合理选择切割线参数。  相似文献   

微分中值定理的推广     

党平安  钟铭 《天中学刊》1997,12(2):13-15

把微分中值定理推广到一元（行列式）函数、向量函数、抽象函数等n个方面.  相似文献   

Chinese children with ASD in Hong Kong (SAR): development of inclusive practice     

Brenda Peters  Chris Forlin 《Journal of Research in Special Educational Needs》2011,11(2):87-98

The advancement of inclusive educational provision in the Asia‐Pacific region has been guided by international research. As one example, Hong Kong has developed a unique and cultural response to inclusive practice within the region. This paper reviews Hong Kong's development of inclusive education practice for children with autism spectrum disorder (ASD). It provides an account of how services in education have developed for Chinese children with ASD, from diagnosis to school placement, and how the students are supported. A number of challenges for the region are discussed including those related to pedagogy, mentoring, placement, support and the need for culturally appropriate professional learning.  相似文献   

Splicing-site recognition of rice (Oryza sativa L.)DNA sequences     

彭司华  樊龙江  彭小宁  庄树林  杜维  陈良标 《Journal of Zhejiang University. Science. B》2003,(5)

INTRODUCTIONCorrectlypinpointingsplicing sitesingenomicDNAsequencesisnotaneasytask ,whichisofgreatimportancetothegenomeannotationandgenefinding .Intronsaregenerallydividedinto3classes,namelycalssI,classIIandcommonnu cleuspre mRNA .IntronofclassIandIIcango…  相似文献   

互逆真蕴涵的建立过程为何要这样定义     

周训伟  鲍泓 《毕节学院学报》2006,24(6):32-35

互逆主义逻辑中的互逆真蕴涵的建立过程与经典逻辑中的实质蕴涵的定义一样,都是三真一假的真值表,但含义却不尽相同。  相似文献   

进一步提高自然科学基金资助项目的创新性之研究   总被引：5，自引：1，他引：5  

王平  王宇田 《科研管理》1996,17(3):25-30

中国国家自然科学基金委员会(NSFC)成立十年来,大力支持基础研究,强调了支持创新的政策,结出了丰硕的成果,证明科技体制改革迈出的这一步是十分正确的.但通过问卷调查,也发现目前无论是从体制、评审程序、资助政策、专家的遴选使用和管理上,都还存在一些不利于创新的因素.如何克服这些不利因素,文中提出了13点具体改进措施  相似文献   

Using lexical chains for keyword extraction   总被引：9，自引：0，他引：9  

Gonenc Ercan  Ilyas Cicekli   《Information processing & management》2007,43(6):1705

Keywords can be considered as condensed versions of documents and short forms of their summaries. In this paper, the problem of automatic extraction of keywords from documents is treated as a supervised learning task. A lexical chain holds a set of semantically related words of a text and it can be said that a lexical chain represents the semantic content of a portion of the text. Although lexical chains have been extensively used in text summarization, their usage for keyword extraction problem has not been fully investigated. In this paper, a keyword extraction technique that uses lexical chains is described, and encouraging results are obtained.  相似文献   

情报学领域人工智能相关研究的文献计量分析及探析     

王林旭  严承希 《图书情报知识》2020,(1):53-62,83

[目的/意义]作为一门与信息技术密切关联的学科,近年来快速发展的人工智能为情报学带来了诸多影响。有效梳理和整合这些影响的发展脉络与应用场景,强化人工智能在当前情报工作中的角色与作用,能为情报学相关研究的发展提供一定的参考与启示。[研究设计/方法]聚焦情报学领域人工智能相关研究,从高被引论文、文献共引、主题词共现三个维度对人工智能在情报学中的知识基础及其演化和研究热点予以分析与解读。[结论/发现]归纳了人工智能研究对情报学的影响,主要包括促进情报学研究主题的衍生和情报学研究方法的革新两方面,并从理论创新、研究对象拓展、信息服务提升与学科建设四个方面探讨人工智能在情报学领域可能的应用。[创新/价值]通过对情报学领域人工智能相关研究进行深入量化分析和定性研究,探讨和揭示了该主题下研究热点、研究趋势和相关发展规律,为相关领域学者提供一定借鉴与启发。  相似文献   

基于机器学习的图书馆用户流失影响因素研讨     

刘桂琴  许新华 《新世纪图书馆》2020,(1):9-13

论文针对图书馆用户流失问题,基于图书馆用户数据,构建用户特征矩阵,利用深度神经网络预测用户流失风险;将存在流失风险的用户作为重点研究对象,根据用户特征,结合S-O-R理论设计图书馆用户流失影响因素模型。采用扎根理论方法设计问卷,提取影响图书馆用户流失的指标因素,并构建结构方程模型进行分析,将技术研究与质性研究相结合,挖掘影响用户流失的核心因素,并在此基础上,构建了图书馆智慧型服务空间设计模型,为图书馆创新服务提供决策支持。  相似文献   

Application of machine learning techniques to assess the trends and alignment of the funded research output     

《Journal of Informetrics》2020,14(2):101018

Research and development activities are regarded as one of the most influencing factors of the future of a country. Large investments in research can yield a tremendous outcome in terms of a country’s overall wealth and strength. However, public financial resources of countries are often limited which calls for a wise and targeted investment. Scientific publications are considered as one of the main outputs of research investment. Although the general trend of scientific publications is increasing, a detailed analysis is required to monitor the research trends and assess whether they are in line with the top research priorities of the country. Such focused monitoring can shed light on scientific activities evolution as well as the formation of new research areas, thus helping governments to adjust priorities, if required. But monitoring the output of the funded research manually is not only very expensive and difficult, it is also subjective. Using structural topic models, in this paper we evaluated the trends in academic research performed by federally funded Canadian researchers during the time-frame of 2000–2018, covering more than 140,000 research publications. The proposed approach makes it possible to objectively and systematically monitor research projects, or any other set of documents related to research activities such as funding proposals, at large-scale. Our results confirm the accordance between the performed federally funded research projects and the top research priorities of Canada.  相似文献