A novel intelligent classification model for breast cancer diagnosis     

Na Liu  Er-Shi Qi  Man Xu  Bo Gao  Gui-Qiu Liu 《Information processing & management》2019,56(3):609-623

Breast cancer is one of the leading causes of death among women worldwide. Accurate and early detection of breast cancer can ensure long-term surviving for the patients. However, traditional classification algorithms usually aim only to maximize the classification accuracy, failing to take into consideration the misclassification costs between different categories. Furthermore, the costs associated with missing a cancer case (false negative) are clearly much higher than those of mislabeling a benign one (false positive). To overcome this drawback and further improving the classification accuracy of the breast cancer diagnosis, in this work, a novel breast cancer intelligent diagnosis approach has been proposed, which employed information gain directed simulated annealing genetic algorithm wrapper (IGSAGAW) for feature selection, in this process, we performs the ranking of features according to IG algorithm, and extracting the top m optimal feature utilized the cost sensitive support vector machine (CSSVM) learning algorithm. Our proposed feature selection approach which can not only help to reduce the complexity of SAGASW algorithm and effectively extracting the optimal feature subset to a certain extent, but it can also obtain the maximum classification accuracy and minimum misclassification cost. The efficacy of our proposed approach is tested on Wisconsin Original Breast Cancer (WBC) and Wisconsin Diagnostic Breast Cancer (WDBC) breast cancer data sets, and the results demonstrate that our proposed hybrid algorithm outperforms other comparison methods. The main objective of this study was to apply our research in real clinical diagnostic system and thereby assist clinical physicians in making correct and effective decisions in the future. Moreover our proposed method could also be applied to other illness diagnosis.  相似文献   

Effects of different evaluative feedback on students’ self-efficacy in learning     

Joanne C. Y. Chan  Shui-fong Lam 《Instructional Science》2010,38(1):37-58

Two studies examined the effects of four types of teachers’ evaluative feedback on Chinese students’ self-efficacy in English vocabulary acquisition. In Study 1, a random sample of Grade 8 students (N = 79) learned prefixes and received either formative or summative feedback after failure in test. The results showed that students who received summative feedback showed a larger decrease in their self-efficacy than those who received formative feedback. In Study 2, a random sample of Grade 7 students (N = 77) went through similar procedures as in Study 1 except that students received either self-referenced or norm-referenced feedback. The results showed that self-referenced feedback was more beneficial to students’ self-efficacy than norm-referenced feedback. The influences of teachers’ evaluation and feedback on students’ self-efficacy are discussed.  相似文献   

Gratitude,gratitude intervention and subjective well‐being among Chinese school teachers in Hong Kong     

David W. Chan 《教育心理学》2010,30(2):139-153

This study assessed the dispositional gratitude and its relationships with orientations to happiness and burnout in a sample of 96 Chinese school teachers in Hong Kong and investigated the effectiveness of an eight‐week gratitude intervention programme using a pre‐test/post‐test design with outcome measures of subjective well‐being in the same sample of teachers. The results indicated that the dispositional gratitude of teachers correlated substantially and positively with a meaningful life orientation to happiness and with personal accomplishment, and correlated substantially and negatively with the two negative components of burnout: emotional exhaustion and depersonalisation. The effects of the gratitude intervention were evident in the increase in scores on satisfaction with life and on positive affect, especially for teachers in the low‐gratitude group. Implications of the findings on the relationships between gratitude and burnout and the effectiveness of gratitude intervention for teachers of different levels of dispositional gratitude are discussed.  相似文献   

Computational fluid dynamics simulation of the wind flow over an airport terminal building     

Chun-ho Liu  Dennis Y. C. Leung  Alex C. S. Man  P. W. Chan 《浙江大学学报(A卷英文版)》2010,11(6):389-401

Turbulence in the wake generated by wind flow over buildings or obstacles may produce complex flow patterns in downstream areas. Examples include the recirculating flow and wind deficit areas behind an airport terminal building and their potential impacts on the aircraft landing on nearby runways. A computational fluid dynamics （CFD） simulation of the wind flow over an airport terminal building was performed in this study of the effect of the building wake on landing aircraft. Under normal meteorological conditions, the studied airport terminal building causes limited effects on landing aircraft because most of the aircraft have already landed before entering the turbulent wake region. By simulating the approach of a tropical cyclone, additional CFD sensitivity tests were performed to study the impacts of building wake under extreme meteorological conditions. It was found that, in a narrow range of prevalent wind directions with wind speeds larger than a certain threshold value, a substantial drop in wind speed （〉3.6 m/s） along the glide path of aircraft was observed in the building wake. Our CFD results also showed that under the most critical situation, a drop in wind speed as large as 6.4 m/s occurred right at the touchdown point of landing aircraft on the runway, an effect which may have a significant impact on aircraft operations. This study indicated that a comprehensive analysis of the potential impacts of building wake on aircraft operations should be carried out for airport terminals and associated buildings in airfields to ensure safe aviation operation under all meteorological conditions and to facilitate implementation of precautionary measures.  相似文献   

当代校园文学活动与文学人才成长——以武汉大学为例     

於可训  刘曼 《海南师范大学学报(社会科学版)》2010,23(3):108-113

大学校园是文学人才成长的摇篮。从＂五四＂时期到抗战时期,中国的大学校园走出了不少优秀作家。近三十年来,武汉大学校园文学活动格外活跃,大批文学人才脱颖而出,形成了一个可观的群体。研究这一现象,对了解文学人才成长的规律,有极为重要的意义。  相似文献   

Conflict from teamwork in project‐based collaborative learning     

Lim Ha Chan  Ching‐Huei Chen 《Performance Improvement》2010,49(2):23-28

This study investigated the conflict occurring during teamwork among college seniors in project‐based collaborative learning in a capstone course. It found that conflict emerged with poor communication, task management, and work allocation; unequal treatments among classmates; egocentricity; a clash of values; and lack of responsibility and initiative. To prepare graduating students for the workforce, teachers should equip them with essential skills and foster students' appropriate work attitude to improve performance.  相似文献   

Teachers’ responses to curriculum policy implementation: colonial constraints for curriculum reform     

Jacqueline Kin-Sang Chan 《Educational Research for Policy and Practice》2010,9(2):93-106

A new approach to curriculum and implementation in a new era normally requires schools and teachers to take more responsibility for student learning. This might present a challenge at any time, particularly when teachers have been used to more directives and less professional approaches to curriculum implementation. In order to meet such a challenge, a new approach to curriculum policy, namely “soft” policy, was used by policy-makers to implement curriculum reform. With the provision of substantial resources, it was expected by the policy-makers that schools and teachers would have better opportunities to develop themselves professionally and manage the new changes effectively. However, such a view misread the situation because the historical trend and present situation of teachers’ professional development were overlooked. This paper uses case studies of schools and teachers involved in the current reforms to show how teachers and schools implemented the reform process. The cases demonstrate how reforms were understood at the local level and the extent to which it could be claimed that implementation had taken place.  相似文献   

资产专用性视角下的移动学习:缺陷与改进     

李曼 《中国远程教育(综合版)》2010,(9)

移动学习是个体利用移动终端和网络,通过实时交互,定制化获取知识和信息,实现自主知识建构的一种社会活动.本文以资产专用性程度为横轴,以互动程度为纵轴,将学习方式分为四个象限,分析了课本学习、广播电视学习、互联网学习、传统课堂学习等不同学习方式的优势与不足.指出狭义的移动学习可借鉴课堂学习的特点,通过调整收费模式、设计专用的移动学习终端、加强反馈和考核、与其他学习方法相结合等方式提高其资产专用性,以改进学习效率并获得更好的学习效果.  相似文献   

高职院校学生参加课外体育活动现状调查分析     

韩金磊  彭曼 《石家庄职业技术学院学报》2010,22(4):77-80

通过对高职院校学生参加课外体育活动的现状的调查分析认为,高职院校学生参加课外体育活动的目的明确,认知良好,但每周参加体育活动的次数和持续时间不尽人意.影响学生参加课外体育活动的主要因素是功课忙、运动场地不足和运动器材短缺等.为此,建议通过加大宣传力度、增加经费投入、发挥学生会及社团的作用等措施来促进体育课外活动的开展,培养学生体育锻炼的兴趣,增强学生体质.  相似文献   

以教学活动促教学质量     

高曼 《南昌教育学院学报》2010,25(2)

创新型国家需要高技能人才,客观上要求高等职业院校必须提高教学质量,教学成功是评判教学质量的关键所在。本文着重从职业院校英语教学切身体会对成功教学做初步探索。  相似文献