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全血质控物混匀方法体会 被引量:2
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作者 王莉萍 王顺芹 杨平安 《医学理论与实践》 2003年第1期71-71,共1页
全血质控物测定前常规颠倒混匀法是取出质控物放置室温,颠倒混匀3min,再旋转混匀5min.由于用人工颠倒混匀,不同的操作人员用力程度和方式都有很大的差别,操作手法不稳定导致测定结果重复性比较差,特别对血小板的影响最大.因此,为了排除... 全血质控物测定前常规颠倒混匀法是取出质控物放置室温,颠倒混匀3min,再旋转混匀5min.由于用人工颠倒混匀,不同的操作人员用力程度和方式都有很大的差别,操作手法不稳定导致测定结果重复性比较差,特别对血小板的影响最大.因此,为了排除人为因素的影响,又保证质量控制结果准确性和精密度,笔者采用微型振荡混匀法对全血质控物进行混匀测定,现报告如下. 展开更多
关键词 全血质控物 混习方法 血液检测
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Intrusion Detection Algorithm Based on Density,Cluster Centers,and Nearest Neighbors 被引量:6
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作者 Xiujuan Wang Chenxi Zhang Kangfeng Zheng 《China Communications》 SCIE CSCD 2016年第7期24-31,共8页
Intrusion detection aims to detect intrusion behavior and serves as a complement to firewalls.It can detect attack types of malicious network communications and computer usage that cannot be detected by idiomatic fire... Intrusion detection aims to detect intrusion behavior and serves as a complement to firewalls.It can detect attack types of malicious network communications and computer usage that cannot be detected by idiomatic firewalls.Many intrusion detection methods are processed through machine learning.Previous literature has shown that the performance of an intrusion detection method based on hybrid learning or integration approach is superior to that of single learning technology.However,almost no studies focus on how additional representative and concise features can be extracted to process effective intrusion detection among massive and complicated data.In this paper,a new hybrid learning method is proposed on the basis of features such as density,cluster centers,and nearest neighbors(DCNN).In this algorithm,data is represented by the local density of each sample point and the sum of distances from each sample point to cluster centers and to its nearest neighbor.k-NN classifier is adopted to classify the new feature vectors.Our experiment shows that DCNN,which combines K-means,clustering-based density,and k-NN classifier,is effective in intrusion detection. 展开更多
关键词 intrusion detection DCNN density cluster center nearest neighbor
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Using Mixed Methods to Investigate the Relationship Between Student Motivation and Academic Achievement From Socio-Cultural Perspective 被引量:1
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作者 Le Huong Hoa 《Sino-US English Teaching》 2013年第2期125-130,共6页
Language learning is a complex process for many reasons. First, it is closely related to linguistics. Second, language is social as it occurs within certain social contexts. And finally, it is individual. Personal cha... Language learning is a complex process for many reasons. First, it is closely related to linguistics. Second, language is social as it occurs within certain social contexts. And finally, it is individual. Personal characteristics such as experience, gender and age, attitude and aptitude, motivation, beliefs, self-confidence, and anxiety greatly influence language learning. Among these variables, motivation is considered to be one of the most important factors affecting the success of second or foreign language learning. However, the relationship between motivation and educational achievement is not quite clear. In the current literature, motivation is regarded as socially constructed, therefore as dynamic rather than static. Little research has been conducted on the motivation of Vietnamese students studying English as a compulsory curriculum component rather than as a major from a socio-cultural perspective. Understanding the relationship between student motivation and academic achievement as well as the socio-cultural factors that affect students' motivation will be an important contribution to motivation theory. Therefore, the situation requires longitudinal and in-depth research into student motivation, the factors affecting it during the learning process, and the relationship between student motivation and academic achievement. A mixed method approach has been chosen to meet the needs of the study. It is believed that insights in these areas will help address the issue of motivation at the Police University. 展开更多
关键词 student motivation academic achievement socio-cultural perspective
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Through Pacific/Pasifika Lens to Understand Student's Experiences to Promote Success Within New Zealand Tertiary Environment
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作者 Juliet Boon-Nanai Vaoiva Ponton +1 位作者 Ailsa Haxell Ali Rasheed 《Sociology Study》 2017年第6期293-314,共22页
Traditionally, education environments are Eurocentric. They have reinforced "pedagogy of the oppressed" where Western knowledge is reflected in the university curriculum and ways of learning and teaching. Factors in... Traditionally, education environments are Eurocentric. They have reinforced "pedagogy of the oppressed" where Western knowledge is reflected in the university curriculum and ways of learning and teaching. Factors influencing success in learning remain an area of strong interest particularly in regard to non-traditional students in learning and teaching settings. This study explores the strategies undertaken by first, second, and third generation Paciflc/Pasifika students to overcome challenges whilst studying and utilizing services provided by staff in the Pasifika Learning Village at the Auckland University of Technology in New Zealand. The study adopted a mixed method approach that was adapted by integrating a Pasfika method of talanoa to understand their experiences so that their voices and stories on how they made it through a tertiary environment are heard and valued. Through Pacific/Pasifika lens, a cultural analysis of Pacific/Pasifika students' knowledge, values, and beliefs highlighted that supplementary cultural spaces, Pacific/Pasifika staff support, and valuing and acknowledging the social space relationships are imperative factors empowering them to succeed in a New Zealand tertiary setting. This paper argues that cultural pedagogies integrated into mainstream revealed successes that warrant recognition as they have demonstrated that traditional models within contemporary settings empower and enhance Pacific/Pasifika students' success. 展开更多
关键词 Cultural lens learning village Pacific/Pasifika talanoa tertiary education
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