Design of Experiments Illustrated by Weighing

A smiple weighing experiment is used to illustrate classical, factorial, fractional replicate of a factorial, confounded factorial and latin square designs of experiments.     

源岩内岩性油气藏形成的模拟实验及机理分析

通过模拟实验，再现了源岩内岩性油气藏的形成过程，对油气运移的受力状态进行分析，探讨了油气聚集成藏的机理，实例说明，源岩内的砂体一般都含油气，这为寻找岩性油气藏创造了条件。     

Are all Pupils Equally Motivated to do Their Best on all Tests? Differences in Reported Test-Taking Motivation within and between Tests with Different Stakes

This study investigated changes in reported test-taking motivation from a low-stakes to a high-stakes test and if there are differences in reported test-taking motivation between school classes. A questionnaire including scales assessing reported effort, expectancies, perceived importance, interest, and test anxiety was administered to a sample of pupils (n?=?375) in 9th grade in direct connection to a national test field trial and then again to the same sample in connection to the regular national test in science. Two-level second-order latent growth modelling was used to analyse data. In summary, the results show a significant increase in reported test-taking motivation from the field trial to the regular test and a significant variability in test-taking motivation between classes.     

数学学习策略的教学

学习策略的教学已成为教育领域中重要的教学模式,学习策略的学习是重要的教学内容.从数学本身的抽象性、系统性、实用性、工具性等特点出发、对数学基础知识的教学策略,数学问题解决的教学策略,数学学习动力的教学策略及数学学习监控的教学策略等入手,论述如何在数学课堂教学中传授数学学习策略的问题.     

电流变液机理和料的研究

从物理角度阐述了电流变液机制,分析了作用于电流变液内悬浮颗粒上的力,并综述了电流变液物理模型和电流变液的发展概况.     

关于数学模型课的几点思考

介绍了教学模型课，探讨了高师院校开设数学课的必要性，指出了开设教学模型课应注意的一些问题。     

Computer modelling and the curriculum -- integrated or loosely attached?

This paper examines from a number of perspectives a small research project that involved the development and evaluation of a crosscurricular course in computer modelling. It sets out briefly the context, design and results of the project in order both to explain the potential of computer modelling activities in learning to represent quantitative variation, and also to highlight the need to develop teachers' pedagogical practices. The role of information technology (IT) in providing support for generic modelling skills is discussed, and theories of teachers' knowledge growth are used to analyse the challenges for professional development in IT, particularly concerning matters that are relevant to more than one discipline. Conclusions are drawn concerning the need to integrate curriculum development, professional development and different areas of expertise in educational computing research if teachers are to be adequately supported in integrating IT into their teaching, rather than merely attaching it to their existing curricula     

Handling missing data: analysis of a challenging data set using multiple imputation

Missing data is endemic in much educational research. However, practices such as step-wise regression common in the educational research literature have been shown to be dangerous when significant data are missing, and multiple imputation (MI) is generally recommended by statisticians. In this paper, we provide a review of these advances and their implications for educational research. We illustrate the issues with an educational, longitudinal survey in which missing data was significant, but for which we were able to collect much of these missing data through subsequent data collection. We thus compare methods, that is, step-wise regression (basically ignoring the missing data) and MI models, with the model from the actual enhanced sample. The value of MI is discussed and the risks involved in ignoring missing data are considered. Implications for research practice are discussed.     

关于线结构和明暗两类素描造型方法的特点与规律

素描与绘画中诸多表现手法,基本上是从线结构与明暗两种素描造型方式中演变或派生而来,无论手法变化如何,大抵总是脱离不了以上两类造型方法的模式.作为初学者,了解和掌握这两类造型方法的特点与规律以及具体画法,将有助于我们更好的认识、理解现今丰富多样的造型手段,并研究和发展素描造型方法,形成自己独特的艺术表现风格.     

New Trends in Distance Learning Utilising Next Generation Multimedia Networks

Bandwidth capabilities of next generation networks have turned interactive multimedia services to a cost effective reality, targeting not only large companies, but SMEs and individual users as well. An application with direct social impact is tele-teaching and in the broader sense distance learning. A large numbers of colleges, universities, and other higher education institutions already offer online courses to their local and remote students, via new methods of education. In this paper, combining the WWW, the H.323/MPEG-4 protocol family and the CORBA model, we specify an open system and network architecture towards the Virtual Classroom realisation. Over this architecture an educational process is described using formal Object Modelling Technique (OMT) rules, while educational services are provided as methods of distributed objects. In this way, a framework is proposed in order to allow educational institutes to publish content in an abstract object-oriented manner, so as to become widely available via the well-known WWW interface.