An international comparison using a diagnostic testing model: Turkish students’ profile of mathematical skills on TIMSS-R

This study illustrates how a diagnostic testing model can be used to make detailed comparisons between student populations participating in international assessments. The performance of Turkish students on the TIMSS-R mathematics test was reanalyzed with a diagnostic testing model called the Rule Space Model. First, mathematical and cognitive skills (‘attributes’) measured by the test were determined. One hundred sixty-two items were coded in terms of their attribute involvement, creating an incidence matrix—the Q-matrix. Using the Q-matrix and the student response data, each student’s attribute mastery profile was determined. Mean attribute mastery levels of Turkish students were computed and compared to those of their American peers. It was shown that Turkish students were weak in algebra and probability/statistics. They also demonstrated poor profiles in skills such as applying rules in algebra, approximation/estimation, solving open-ended problems, recognizing patterns and relationships, and quantitative reading.

工程材料与成形加工基础实验远程教育系统的研制

工程材料与成形加工基础实验是机械类专业必修的重要实践性教学环节．由于客观条件的限制，按传统方式进行实验严重影响了实验教学的效率。另外，接受远程教育的学生．无法到学校实验室做具体的实验已经成为影响远程教育教学质量的一个重要因素。而采用本项目研发的远程教育系统，不仅为解决上述问题提供了解决方案，而且对于贫困地区的教学和培训尤具优势。本文结合该系统的开发研制．论述了系统应遵循的开发流程和远程教育系统的开发技术。     

真空冷冻干燥过程生产率工艺优化的实验研究

采用二次正交试验设计实验方案,对胡萝卜进行了真空冷冻干燥实验,建立了单位面积生产率与冻干室压强、加热板温度和冻干厚度的二次回归数学模型,分析了过程参数对实验指标的影响特性,并由此得到了冻干生产率的优化参数.     

中学化学实验创新教育的思考与实践

本文以中学化学实验创新教育为视点,针对目前普遍存在的问题,从创造性人格教育、创造能力培养、创造性思维训练三个方面进行了思考和实例介绍.     

Influences affecting the soil-water characteristic curve

INTRODUCTION The soil-water characteristic curve (SWCC) gives the relationship between the amount of water in the soil (i.e. gravimetric or volumetric water content) and soil suction (i.e. matric suction at low suction and total suction at high suction). Many properties of a partially saturated soil such as the coefficient of permeability, shear strength and volume strain, pore size distribution, the amount of water contained in the pores at any suction, can be obtained from the SWCC. …     

Study on the submerged fermentation (SMF) of termitomyces eurrhizus

The influence of KH\-2PO\-4, peptone and brown sugar on Termitomyces fuliginosu's mycelium formation was studied with the application of the design of quadratic rotation general combination based on determining the growth curve. A quadratic regression model of biomass to the doses of the above three factors was established. The model fit well and therefore the optimum fermentation condition was obtained. Responses of biomass to the three single factors and to their interactions were discussed. Thus, the highest level of biomass, 21.1 g/L, appeared under the optimized conditions when the initial KH\-2PO\-4, peptone and brown sugar were 1 g/L, 4 g/L and 72 g/L respectively.     

Multisim8在电子技术实验教学应用中的探讨

通过实例探讨了电子电路仿真设计软件Multisim在电子枝术实验教学中的应用。     

Mathematical biography and key rhetoric

The intention of this article is to consider the use of narrative and rhetorical inquiry as research methods. I construct a mathematical biography of one elementary teacher trainee, Sirpa, who had performed well in her advanced mathematics course in upper secondary school. I describe her development as a mathematics teacher during teacher education from her second-year methods course and teaching practice to fourth-year teaching practice. Narrative inquiry is more than a case study: Sirpa’s mathematical biography is a story that describes how she constructs her mathematical identity. I also analysed the key rhetoric that Sirpa used in her talk, key rhetoric here referring to the strategy by which she constructed continuity and coherence.     

基础教育改革的新探索——基于安徽省“自育自学”教育实验的考察

在大力推进当代基础教育改革的浪潮中,由何炳章先生倡导和主持的以安徽省庐阳区为主的“自育自学”实验为此作出了新的有益探索。它的“引导自学”课型是成功的课堂教学结构改革模式,“读”、“吃·睡”、“炼”是有特色有成效的教育改革模式。这一既有历史继承性又有当代性和创新性的教育实验,必将为丰富中国的教育理论作出更大贡献。     

基于MATLAB教学平台的高职数学教学改革与实践

针对高职数学教学现状,讨论了高职数学教学中教学内容及教学方法改革的必要性。同时,简要地介绍了MATLAB软件,并举例说明了利用其进行数学实验教学的优点和作用。