塑料三通管挤胀成型过程的运动学研究

通过对三通管挤胀成型过程中的不同变形部位进行分区建立坐标系，确定了不同区域内材料塑料性流动的速度场分布。     

计算机辅助教学在化学课堂教学中的功能分析

通过计算机辅助教学的介绍，对计算机辅助教学在化学课堂教学中的功能进行了分析，这些功能包括：课堂直观性好，化抽象为具体；丰富课堂内容，开阔学生视野；化学实验演示，一目了然；利用计算机设计课堂练习。抓住重点，突出难点；通过网络教学，激发学生学习的兴趣。     

Comparing hybrid learning with traditional approaches on learning the Microsoft Office Power Point 2003 program in tertiary education

The purpose of this study was to determine the effectiveness of a hybrid learning approach to deliver a computer science course concerning the Microsoft office PowerPoint 2003 program in comparison to delivering the same course content in the form of traditional lectures. A hundred and seventy-two first year university students were randomly assigned into two teaching method groups: traditional lecture instruction (TLI) and hybrid lecture instruction (HLI). Each group received six 95-min periods of instruction divided into 4 sections: a) 5-min brief outline of the key learning points, b) 40-min lecture on general knowledge c) 45-min constructivist-inspired learning activities and d) 5-min summary on key learning points. In the beginning and the end of this study students completed a 17-item multiple choice knowledge test. Two-way analysis of variances (ANOVA), with repeated measures on the last factor, were conducted to determine effect of method groups (TLI, HLI) and measures (pre-test, post-test) on knowledge test. The measures main effect was significant, as well as the groups x measures interaction effect. Two independent-samples t test were conducted to follow up the significant interaction. Differences in mean ratings of knowledge performance between the two teaching groups were not significantly different at first measure, while the TLI method group yielded a significantly lower mean rating at second measure. The findings indicated that HLI approach might be a superior option for undergraduate students on learning the Microsoft office PowerPoint 2003 program.     

多媒体在中学化学教学中的作用

多媒体技术作为一种有效的教学辅助手段,已广泛地走进课堂。本文介绍了在传统的课堂教学中,以实施素质教育目的,提高教学质量和效益,合理地运用多媒体技术,充分发挥其优势,并与传统教学相结合,达到事半功倍的效果。     

Fourth graders' sensitivity to morphological context in spelling.

An important aspect of spelling development in English involves the child's ability to use morphological context to deal with one-to-many sound-spelling mappings for word endings. One case involves /z/ endings that follow long vowels, where an “s” spelling is required in the case of inflected noun and verb contexts, but an “se” or “ze” spelling is required in the case of noninflected nouns and verbs. The present study examined the ability of good and poor spellers in Grade 4 to capture these morphological distinctions in a pseudoword spelling task. Overall, the good spellers outperformed the poor spellers, and both groups were more sensitive to the inflected–noninflected noun distinction than the inflected–noninflected verb distinction. These findings underscore the importance of linguistic factors in spelling development as well as the necessity of providing due consideration to these factors in spelling instruction. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

大丰港铁路支线接轨及走向方案的选择

以大丰港铁路支线为例，介绍了在平原地区选线设计时应注意的问题，提出应重点解决接轨及走向方案的选择，通过比选采用了最优接轨及走向方案，从而提高了运输效率。     

“7·21”暴雨洪水大清河系北支暴露的管理问题

2012年7月21~22日在河北省保定太行山东麓的一场大暴雨,引发了大清河系北支局部洪水,此次洪水过程峰高量小、历时短,却下泄不畅,拒马河流域损失极大,同时暴露出河系北支管理中存在着违法建筑、汛期施工、非法采砂等几个有待解决的问题,现对其进行分析,并提出意见及建议。     

引进CBE模式 探索化工职业能力培养

ＣＢＥ模式是近年来广泛被北美国家采用的一种职业技术教育模式，贵州省化工学校于１９９８年引进该模式，对工业分析专业的相关课程进行教改。本文从ＣＢＥ模式的内涵到ＣＢＥ模式的引进实践阐述了化工职业能力培养的新途径。     

A fast and efficient load flow technique for unbalanced distribution system

This paper presents a fast and efficient load flow technique for unbalanced distribution system. The proposed load flow technique is derived by promulgating the concept of conventional backward forward sweep (BFS) technique of power flow study for distribution system. The proposed technique employs a novel load-impedance matrix (LIM) to calculate the bus voltages in a single step unlike the conventional BFS approach which involves two separate steps (backward sweep and forward sweep) to perform the same and this improvement is claimed as the novelty of this work. This distinctive feature makes the proposed algorithm faster in operation. Nodal voltages, at any iteration, may be calculated, directly, from the values obtained in the previous iteration by utilizing LIM. A simple concept of set theory is adopted here to construct the LIM. Special treatments are also included in this method to analyze weakly meshed systems. The proposed technique is flexible enough to accommodate any sort of changes in the existing network topology through LIM. It is tested on different three-phase balanced and unbalanced radial distribution systems as well as weakly meshed networks for load flow study. A separate case study is also presented to check the validity of the proposed load flow technique for various transformer connections. The obtained results demonstrate the effectiveness of the proposed technique. Furthermore, performance comparison reveals that the proposed algorithm is, computationally, faster and robust than the conventional power flow techniques reported in the recent state-of-the-art literatures.     

My Text: An alternative to the traditional textbook

Both college level students and instructors alike have become frustrated with the modern textbook. Textbooks are expensive, passive in tone; water downed, and rarely has the breadth and depth that is needed for a course. Recently, Myles Johnson a former Psychology Instructor, has come up with an instructional method known as My Text that addresses these frustrations. Here students, with the instructor’s guidance, create their own textbooks. This paper takes a look at some of the Pedagogical merits of this method as a Learner Centered Approach and makes recommendations for future research.