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学习-考试型的粒子群优化算法 被引量:1
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作者 代军 李国 徐晨 《计算机工程与应用》 CSCD 北大核心 2009年第18期48-50,108,共4页
标准的粒子群算法在进化后期常易于陷入局部最优。为提高粒子群算法的寻优性能,首先对学生学习-考试机制进行分析,得到学习-考试机制的基本原则,然后,利用该原则和粒子局部最优的信息,在粒子陷入局部最优时,对粒子的位置分量进行有机地... 标准的粒子群算法在进化后期常易于陷入局部最优。为提高粒子群算法的寻优性能,首先对学生学习-考试机制进行分析,得到学习-考试机制的基本原则,然后,利用该原则和粒子局部最优的信息,在粒子陷入局部最优时,对粒子的位置分量进行有机地组合,即考试策略。数值实验结果证明了新策略极大地提高了粒子的寻优性能。 展开更多
关键词 粒子群优化 进化计算 策略 学习-考试
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学习-考试干预模式在儿童MR检查中的应用
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作者 李倩 王明 +4 位作者 王亚丽 张雪松 张平 赵建 白琳 《河北医药》 CAS 2023年第15期2298-2301,共4页
目的探讨MR检查前学习-考试干预模式对提升儿童MR检查配合度及图像质量的效能,评估其临床应用价值。方法连续性招募需行MR检查的6~9岁儿童63例,纳入研究组21例,纳入对照组42例,所有入组病例在检查前进行MR检查认知评分及恐惧视觉模拟量... 目的探讨MR检查前学习-考试干预模式对提升儿童MR检查配合度及图像质量的效能,评估其临床应用价值。方法连续性招募需行MR检查的6~9岁儿童63例,纳入研究组21例,纳入对照组42例,所有入组病例在检查前进行MR检查认知评分及恐惧视觉模拟量表(FVAS)评分。上述评分后,研究组采用学习-考试模式进行干预,对照组给予常规护理干预。干预后2组再次进行上述评分,然后进行MR检查。分别观察两种不同干预模式下患儿对MR检查认知及其恐惧情绪的变化情况,并比较2组患儿对MR检查认知及恐惧情绪的变化程度的差异。MR检查完成后,由2名具有丰富影像诊断经验的放射科医师对MR图像进行质量评分。观察2种不同干预模式下获得的MR图像的图像质量评分的差异性。结果不同干预模式下2组患儿对MR检查认知评分均高于基线(P<0.05),FVAS评分均低于基线(P<0.05);研究组在干预后对MR检查认知评分的提高程度大于对照组(P<0.05),FVAS评分的降低程度大于对照组(P<0.05);研究组MR图像质量评分高于对照组(P<0.05)。结论MR检查前的护理干预对于提高儿童的检查配合度和依从性具有积极的作用,有助于提高儿童MR图像质量。学习-考试干预模式较常规护理模式对提升儿童MR图像质量的效能更加显著,为临床工作中儿童MR检查成功率低、图像质量差等难题提供了更优的解决方法。 展开更多
关键词 学习-考试干预模式 图像质量 儿童 磁共振成像 护理干预
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An Empirical Study of the Washback of CET-4 Writing 被引量:1
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作者 Lianglong Chu Ping Gao 《Sino-US English Teaching》 2006年第5期36-38,共3页
This article is an empirical study on the washback of the writing section (i.e. writing subtest as in this paper) of College English Test Band Four (CET-4) on ELT in Chinese colleges and universities so as to prom... This article is an empirical study on the washback of the writing section (i.e. writing subtest as in this paper) of College English Test Band Four (CET-4) on ELT in Chinese colleges and universities so as to promote the positive effects and diminish the negative ones. The study collected data from 181 college English learners, nine college English teachers and two CET-4 raters through interview, observation and documentary analysis. Findings indicate that CET-4 writing subtest produces more negative impacts than positive ones. Moreover, the findings also indicate that the washback of CET-4 writing is weakened by other sections of the test. 展开更多
关键词 washback effect CET-4 writing subtest College English teaching
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An Investigation of Iranian Students' English Proficiency Test Scores in Relation to Socio-Economic Status and Gender
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作者 Aman Rassouli Necdet Osam 《Sino-US English Teaching》 2013年第4期261-268,共8页
Every day many students apply for and enroll in language-teaching courses to achieve their aims through learning another language. However, learning another language does not occur identically among all students. Some... Every day many students apply for and enroll in language-teaching courses to achieve their aims through learning another language. However, learning another language does not occur identically among all students. Some students learn a language, even their own mother tongue earlier but some others may need to spend more time acquiring a language. Seeking out for the probable reasons for such a difference, the current study following the constructivist approach to language learning and bearing in mind the role of society and human communities in language learning, was concluded to investigate the probable impact(s) of some social variables (social status, attitudinal and motivational status of learners) on language learning outcomes of Iranian adult learners assessed through a standardized English proficiency test. The findings have revealed that the social milieu in which learners live may play a decisive role as far as learning opportunities, input and resources are concerned. 展开更多
关键词 SES (socio-economic status) ATTITUDE GENDER
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An Approach to Teaching CET-4 Writing
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作者 Zhouping Wei 《Sino-US English Teaching》 2006年第5期32-35,共4页
English writing is gaining great attention and emphasis in Zhongkai University of Agriculture and Technology syllabus, and having an important role to play in learning and communicating. However, of the five items of ... English writing is gaining great attention and emphasis in Zhongkai University of Agriculture and Technology syllabus, and having an important role to play in learning and communicating. However, of the five items of CET-4 (listening, reading, vocabulary, cloze and writing), writing remains the most difficult. Some new methods and activities are needed to maximize the efficiency of traditional methods and keep students interested in this course. This paper provides a step-by-step description of an integrated approach and activities in a writing course for non-English major students, which combines reading with writing and makes teaching writing become an integrated and interesting process. 展开更多
关键词 college English writing integrated approach
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Lower Intermediate Readers and Their Use of Cognitive and Metacognitive Strategies
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作者 Parisa Daftarifard Parviz Birjandi 《Sino-US English Teaching》 2015年第10期757-761,共5页
Despite much research done on strategy, there still exist several questions unanswered. Not much research is done to examine lower intermediate English as a Foreign Language (EFL) learners' performance on the readi... Despite much research done on strategy, there still exist several questions unanswered. Not much research is done to examine lower intermediate English as a Foreign Language (EFL) learners' performance on the reading section of the First Certificate of English exam (FCER) in the post strategy instruction period. The results indicate that learners vary not only in terms of their performance on the FCER, hut also on the employed metacognitive strategy. Furthermore, metacognitive strategies are the only predictors that positively predict learners' performance in the FCER. 展开更多
关键词 reading comprehension cognitive and metacognitive strategies first certificate of English
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Assessing Student Learning Using the Constructor Qualification Examination in US Accredited Programs
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作者 Keith Everette Sylvester 《Journal of Civil Engineering and Architecture》 2012年第11期1473-1481,共9页
Today, construction management programs face growing academic accountability resulting in the need to define new program outcomes to measure student learning. In most cases, student learning is analyzed only within th... Today, construction management programs face growing academic accountability resulting in the need to define new program outcomes to measure student learning. In most cases, student learning is analyzed only within the context of an academic program using survey methods which do not accurately quantify overall student learning. Contrary to this condition, construction management programs increasingly require students to take level lofthe nationally administered CQE (constructor qualification exam) upon graduation. However, little or no analysis of this data is conducted beyond basic interpretation of the national and program averages provided by the testing agency. Providing a statistical approach to analyze this data and to propose recommended strategies for its improvement, this research develops and investigates statistical methods to analyze the national test data as a program assessment tool for student learning. Specifically, this work seeks to develop performance standards and expectations for students when taking the CQE exam, to define correlations between student GPA (grade point average) and student performance on the CQE exam. Likewise, this work presents methods to identify program weakness and strategies for improvement by comparing the CQE Level 1 exam with ACCE (American council for construction education) accreditation standards. 展开更多
关键词 Construction management ASSESSMENT student learning
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First Exploration on The Reform of Experimental Examination of Physiology in Higher Vocational College Students
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作者 Gao Yinli Zhang Jieqiong +1 位作者 Wang Ya’ning Li Junli 《International Journal of Technology Management》 2017年第1期13-15,共3页
Objective:The purpose of this paper is to explore the application effect of diversified assessment mode in physiology experimental examination of higher vocational college students.Method:We selected 173 higher voca... Objective:The purpose of this paper is to explore the application effect of diversified assessment mode in physiology experimental examination of higher vocational college students.Method:We selected 173 higher vocational college students as the research group,in the experimental assessment,adopted diversi? ed assessment model;and selected 192 higher vocational college students as the control group,adopted the traditional assessment method.The pathological examination scores of the two groups were compared,and the research group was investigated by questionnaire.Result:The physiological end term test scores (t=1.973,p〈0.05) and experimental operation assessment scores of the research group were higher than those of the control group (t=1.624,p〈0.05).The diversified assessment model helps to improve the learning initiative,improve learning interest,foster collaboration and communication ability,reduce learning pressure and reduce anxiety before examination.Conclusion:The diversified assessment model can highlight the cultivation of professional skills and innovation ability,enable students reserve the necessary knowledge through inquiry and cooperative learning,and conducive to sustainable development of students.B 展开更多
关键词 Diversified Assessment Physiology Experiment Higher Vocational College Students
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