新疆维吾尔族预科生声调调域偏误实验分析     

于丽  李燕萍 《新疆职业大学学报》2013,21(1):65-68

以中介语偏误分析理论为基础,采用实验分析的方法,对新疆高校维吾尔族预科生使用汉语的声调调域偏误进行了分析研究,探寻了其声调习得的难点,以求有助于汉语声调的教与学。  相似文献   

大学英语课堂教师纠错性话语分析与学生反馈的研究     

满志慧 《湖北广播电视大学学报》2013,33(1):123-124

在外语学习过程中,学习者的错误一直受到广泛的关注,不同的教学流派对于错误有着不同的态度,但在课堂教学中,错误的纠正仍然是必不可少的环节。教师纠错应以学生受益但不伤害其学习积极性为前提,用宽容的态度对待学生的错误,纠错的时候要既要掌握好最有效的时机,又要考虑到学生的情感因素,必要时可以采用给学生提示信息和肢体语言等方法,帮助学生及时有效的改正自己的问题。  相似文献   

Validation of the child sex abuse attitude scale through confirmatory factor analysis     

F. Felicia Ferrara 《Structural equation modeling》2013,20(1):99-112

A validation study was conducted on the Child Sex Abuse Attitude Scale (CSAAS) using confirmatory factor analysis (CFA) to examine factor structure. The CSAAS was developed based on Festinger's (1957) theory of attitude development resulting in a 4‐factor first‐order structure (cognition, value, affect, and behavior) and a single‐factor 2nd‐order structure (attitude). A sample of 215 school psychologists, members of the National Association of School Psychologists, responded to the CSAAS survey. CFA results supported the hypothesized factor structure of the CSAAS, thus indicating the plausibility of a 4‐factor 1st‐order and a single‐factor higher order structure of the CSAAS.  相似文献   

基于FCM聚类及抖动半调的数码迷彩生成方法     

朱映辉  江玉珍  李建忠 《韩山师范学院学报》2013,(3):33-37

数码迷彩因其不规则、不平滑的边缘特征而具备更强的伪装适应性．为快速有效地生成实用型数码迷彩,在传统迷彩基础上,提出一种基于误差扩散（E—D）抖动半调的数码迷彩生成算法．利用像素的三基色分量值作为特征值对迷彩原图作模糊C均值（FCM）聚类分析以提取迷彩主色,结合图像缩放、Gaussian滤波等图像处理,运用E—D抖动半调方法将传统迷彩图转换成数码迷彩图．实验证明,生成图既保持了迷彩原图的颜色分布及纹理特征,也具备了不规则的、锯齿状的边缘特征,有效地提高了迷彩的伪装隐蔽性能．  相似文献   

基于最小二乘优化的高精度参数估计研究     

侯伟真  李华  刘全昌 《泰安师专学报》2013,(3):56-61

研究了捕食者一被捕食者模型在不同观测误差条件下的非线性微分方程组参数估计问题．首先利用差分方法进行离散化,得到一个超定的线性方程组,进行最小二乘拟合优化;其次,考虑观测资料有误差而时间变量无误差的情况,通过利用周期取平均的方法,从而降低了数据的误差;最后针对时间变量也会有误差情况,对每个观测时刺的数据进行归整处理来降低时间上的观测误差,最后利用最小二乘拟合得到最优的参数值．  相似文献   

基于机器视觉和MATLAB/GUI的柚子外观尺寸检测系统     

龚昌来  李东山  罗聪  黄杰贤 《嘉应学院学报》2013,(11):14-18

介绍了一种基于机器视觉技术的柚子外观尺寸检测系统.利用CMOS摄像头采集柚子正立图像,通过数字图像处理技术获取柚子的纵径、横径、表面积及体积等外观尺寸参数.借鉴已有球状水果机器视觉检测误差理论,对检测数据进行修正,提高检测精度,并应用Matlab/GUI技术建立柚子外观尺寸测量系统界面.实验表明,检测系统具有较高的检测精度,可满足实际生产中柚子分级精度的要求,且人机交互界面友好,使用操作方便.  相似文献   

Beauty of“Deviance”:A Study of Hills Like White Elephants from the Per-spective of Motivated Prominence     

LUO Jia-jing 《海外英语》2013,(9)

Ernest Hemingway’s short story of Hills Like White Elephants is a masterpiece with an open ending depicted with virtu-osity. While it has attracted much discussion from different perspectives, one part...  相似文献   

Teaching Information Literacy Courses in The Context of Library and Information Science Education in Bulgaria: Challenges and Innovative Approaches     

Marina Encheva 《图书馆管理杂志》2013,53(5):595-602

ABSTRACT

The article examines the application of innovative approaches in the information literacy training of library and information science students in Bulgaria. The change of the educational paradigm in the field is presented based on recent developments in one of the oldest Bulgarian institutions that prepares librarians and information specialists—the State University of Library Studies and Information Technologies. The active learning strategies suitable for information literacy skills development courses are studied by the use of three methods: “learning by doing,” “interaction in the learning group,” “learning by trial and error” within the practical training of students. The prospects for transforming information literacy instruction through the elaboration of digital educational games and a game-based learning model in the frame of the international project tiLIT are also outlined.  相似文献   

我国产业结构与石油消费增长路径分析   总被引：1，自引：0，他引：1  

郑玉华  罗东坤  张亚芳 《软科学》2013,27(2):1-5

在分析我国产业结构和石油消费结构变化趋势基础上,运用协整分析和向量误差纠正模型对石油消费量增长和三次产业经济增长之间的动态关系进行研究。结果显示,从长期关系上看,石油需求对第三产业的弹性系数最大,第二产业次之,由于两者的挤出效应使对第一产业的弹性系数为负;从短期调整能力来看,石油需求增长偏离长期趋势主要是受第二、第三产业的影响,但是由于影响系数较小,短期影响能力有限,我国的石油消费增长具有较强的连续性和惯性。针对产业结构和石油消费的上述联系和特点,提出了相应的政策建议。  相似文献   

Reproducibility of an isokinetic eccentric muscle endurance task     

《European Journal of Sport Science》2013,13(5):311-319

Abstract

Despite the widespread use of isokinetic eccentric muscle endurance protocols, no research has examined the absolute and relative reliability of such tests. The aim of this study was to examine the reliability of an isokinetic eccentric knee muscle endurance task. Fifteen healthy untrained males volunteered to take part in the study and written informed consent was obtained. The procedures received approval from the University Research Ethics Committee. Participants visited the laboratory on three separate occasions: 2 weeks before testing to familiarize them with the experimental procedures, and on two separate occasions, 2 weeks apart and at the same time of day. Isokinetic eccentric knee extension and flexion movements of the dominant limb were performed using a calibrated dynamometer (Biodex System 3). Range of motion during testing was set using voluntary maximal full extension (0 rad) to 1.57 rad of knee flexion and testing was conducted at 1.56 rad · s^?1. Participants performed four maximal efforts to determine maximal peak torque. After 2 min rest, participants completed the all-out endurance test of 50 continuous eccentric repetitions. Data were gravity corrected and windowed to only include constant velocity periods. Repeated-measures analyses of variance were used to examine differences in maximal peak extension and flexion torque and the maximal torque measurement recorded during the endurance test. Absolute and relative reliability of the torque fatigue index, work fatigue index, and total work were assessed through calculation of intra-class correlation coefficients, coefficients of variation, and absolute 95% limits of agreement using the methods described by Bland and Altman (1986). Differences between the strength test and the endurance trial for peak torque were found to be non-significant for both quadriceps (323 vs. 323 N · m) and hamstrings (183 vs. 178 N · m). The intra-class correlation coefficients revealed significant (P<0.05) positive moderate to strong correlations (r=0.44–0.94) across repeated trials for all parameters except hamstring torque fatigue (P=0.11) and hamstring work fatigue index (P=0.08). Coefficients of variation ranged from 6% to 48% and were large for the work fatigue index and torque fatigue index but acceptable for total work for both the extensors and flexors. The 95% limits of agreement indicated systematic bias in repeated trials for both the work fatigue index and torque fatigue index for extensors and flexors, ranging from ?3% to ?10%, with less fatigue evident in the second test. There was also systematic bias for total work, with more work being performed during the second than the first test for both extensors and flexors. The random error was large for all variables and there was greater random error in the hamstrings compared with the quadriceps. Together with moderate to strong intra-class correlation coefficients and large coefficients of variation, the data suggest that there is small systematic bias in repeated eccentric muscle actions for both the quadriceps and hamstrings, although the random error was large despite habituation procedures. Therefore, data from an isokinetic eccentric muscle endurance task should be viewed with some caution even when participants receive considerable habituation before assessment.  相似文献