期刊数据库与信息服务

文章论述了高校图书馆建立期刊数据库的必要性,以及如何提高建库质量,从而提高效率更好地为读者服务等问题.     

议《爱玛》两译本

本文从理解的准确性和表达的流畅性两方面对〈〈爱玛〉〉两译本进行对比读,认为对同一原著的不同译本进行对比研究,对翻译学习者的理论研究和翻译实践都有重要的指导价值。     

对乒乓球动作技术教学准确性及规范性的探讨

乒乓球运动是一项比较普及的运动项目,有条件的学校已将乒乓球运动列为授课内容,针对乒乓球课教学中学生掌握动作技术的差异性,在乒乓球动作技术教学中,如何提高动作的准确性及规范性是本文研究的主要问题.     

Predictive assessment of reading

Study 1 retrospectively analyzed neuropsychological and psychoeducational tests given to N=220 first graders, with follow-up assessments in third and eighth grade. Four predictor constructs were derived: (1) Phonemic Awareness, (2) Picture Vocabulary, (3) Rapid Naming, and (4) Single Word Reading. Together, these accounted for 88%, 76%, 69%, and 69% of the variance, respectively, in first, third, and eighth grade Woodcock Johnson Broad Reading and eighth grade Gates-MacGinitie. When Single Word Reading was excluded from the predictors, the remaining predictors still accounted for 71%, 65%, 61%, and 65% of variance in the respective outcomes. Secondary analyses of risk of low outcome showed sensitivities/specificities of 93.0/91.0, and 86.4/84.9, respectively, for predicting which students would be in the bottom 15% and 30% of actual first grade WJBR. Sensitivities/specificities were 84.8/83.3 and 80.2/81.3, respectively, for predicting the bottom 15% and 30% of actual third grade WJBR outcomes; eighth grade outcomes had sensitivities/specificities of 80.0/80.0 and 85.7/83.1, respectively, for the bottom 15% and 30% of actual eighth grade WJBR scores. Study 2 cross-validated the concurrent predictive validities in an N=500 geographically diverse sample of late kindergartners through third graders, whose ethnic and racial composition closely approximated the national early elementary school population. New tests of the same four predictor domains were used, together taking only 15 minutes to administer by teachers; the new Woodcock-Johnson III Broad Reading standard score was the concurrent criterion, whose testers were blind to the predictor results. This cross-validation showed 86% of the variance accounted for, using the same regression weights as used in Study 1. With these weights, sensitivity/specificity values for the 15% and 30% thresholds were, respectively, 91.3/88.0 and 94.1/89.1. These validities and accuracies are stronger than others reported for similar intervals in the literature.     

The impact of bilingual dictionaries on lexical sophistication and lexical accuracy in tests of L2 writing proficiency: A quantitative analysis

Writing assessment essentially juxtaposes two elements: how ‘good writing’ is to be defined, and how ‘good measurement’ of that writing is to be carried out. The timed test is often used in large-scale L2 writing assessments because it is considered to provide reliable measurement. It is, however, highly inauthentic. One way of enhancing authenticity in a way that might also promote good writing is to include access to support resources in the test. This article reports a study into whether allowing a bilingual dictionary enhances good writing in German writing tests. Participants (n = 47) took two tests, one with and one without a bilingual dictionary. The essays of sub-sets of the participants were compared in terms of lexical sophistication, lexical accuracy and test score. Lexical sophistication was measured by means of the Lexical Frequency Profile (Laufer & Nation, 1995). Lexical accuracy was determined through a quantitative analysis of words looked up in the dictionary. The results revealed an increase in lexical sophistication in ‘with dictionary’ tests but frequent misuse of look-ups. There was also no improvement in test scores. Subsequent issues for the use of dictionaries in writing tests are raised.     

直线度误差评定算法综述

当今对制造精度的要求越来越高,随着各种先进测试仪器的发展,各种误差评定算法就显得尤为重要.本文对各种直线度误差评定算法进行了比较,给实际应用中选用算法时作了一定的参考.     

平差成果可视化研究

本文主要述阐述了用VC++编制的测量平差软件,其自动绘制平面控制网图和边、点精度显示功能的实现方法.即如何实现测量成果的可视化.     

A Pragmatic Analysis of the Negative Transfer in Chinese EFL Learners

This paper analyzes the accuracy and appropriacy of the recorded data from a group of Chinese-speaking English learners who has finished three communicative tasks set in different contexts.It also tries to find out how the participants’ learning history and the present Chinese EFL context influence their performance.The results suggest that the participants rely on a limited set of request,apology,and refusal strategies.And it is evident that low-level learners often refer to their L1 for sentence constructions and lexical items.Although the evidence is still fragmentary,enough exists to indicate that transfer involving discourse can often occur in foreign language acquisition.     

任务前准备在初中任务型课堂教学中的作用

任务前准备是任务型教学中的环节,但在我国中学任务型教学中尚未得到重视。国外的研究表明,任务前准备能积极影响成人学生在任务完成阶段的语言质量。实验发现,任务前准备在提高我国初中学生完成任务时语言的流利性方面有明显的作用,提出任务前准备应成为中学任务型教学中不可忽视的重要部分。     

齿侧间隙对桁架机械手定位精度的影响

为了探究齿侧间隙对桁架机械手定位误差的影响,综合考虑齿侧间隙导致的传动稳定性变化等对定位精度的影响,通过改变水平速度、竖直速度、齿侧间隙、负载4个因素进行L16(44)正交试验以及齿侧间隙变化的单因素试验。正交试验表明,以最终定位误差作为评价指标,水平速度、竖直速度、齿侧间隙、负载在影响桁架机械手的定位精度中都扮演着重要角色,对定位精度的因素影响主次为:齿侧间隙>负载>竖直速度>水平速度。齿侧间隙单因素试验结果证明:齿轮齿条系统必须留有一定齿侧间隙来保证正常传动;总体上齿侧间隙的增大对于定位精度的偏差影响呈现上升趋势,但在180~330μm范围内时,会在80μm的范围内小幅度波动。