旋风除尘器操作试验台的建模设计     

薛来  华张国 《实验室研究与探索》2011,30(9):39-41

设计制作了"旋风除尘器操作试验台",该装置能调节风量、进灰量等各种试验参数,可观察除尘器内部的气流运动、除尘效果和灰分收集情况,为"大气污染控制工程"和"锅炉原理"等课程的教学提供了实验手段。通过对旋风除尘器的工作原理及结构进行分析,建立以除尘效率、压力损失为目标函数的双目标数学模型。考虑了设计变量和约束条件后,经过优化设计,寻找出旋风除尘器的最优化结构参数,绘制试验平台结构图,并制作了旋风除尘器操作试验台。  相似文献   

基于SolidWorks超越离合器的三维建模及运动仿真     

袁琪 《孝感职业技术学院学报》2011,(3):89-92

通过对滚柱式超越离合器的工作原理及结构进行分析,运用SolidWorks软件实现三维实体建模及装配,并结合SolidWorks_COSMOSMotion模块对超越离合器的单向转动、反向空转和超越转动进行运动仿真分析。  相似文献   

Investigating the relationship between pre-service physics teachers' professional knowledge,self-concept,and interest     

Stefan Sorge  Melanie M. Keller  Knut Neumann  Jens Möller 《科学教学研究杂志》2019,56(7):937-955

This study investigates the relationships between professional knowledge, self-concept, and interest of pre-service physics teachers. In order to support student learning and interest development alike, teachers need a profound professional knowledge and respective motivational orientations. Developing both professional knowledge and motivational orientations in teachers is therefore a key challenge of teacher education. Prior research has focused on the development of content knowledge (CK) and pedagogical content knowledge (PCK) within teacher education, but the role of motivational orientations such as self-concept and interest have mostly been neglected areas of study. As individuals develop domain-specific motivational orientations, they compare their achievement in an external frame to the achievement of their peers, and they compare their achievements in an internal frame across domains. The effects of these psychological processes on domain-specific motivational orientations are described by the generalized internal/external frame of reference model (GI/E model). We assessed the professional knowledge (CK and PCK) and motivational orientations (self-concept and interest) of N = 200 pre-service physics teachers from 12 teacher education institutes in Germany. To investigate the predictions of the GI/E model, we utilized structural equation modeling. In line with the GI/E model, the analysis revealed that pre-service teachers use social comparisons. Pre-service teachers with a higher CK/PCK also showed a higher CK/PCK self-concept. We also identified instances of internal comparisons as we found that a high level of CK corresponds with a lower PCK self-concept. While we could not identify the same effects from professional knowledge on interest, self-concept mediated the effects from professional knowledge on interest. The results suggest that interdependencies between professional knowledge and motivational orientation should be given more consideration in teacher education research and should also be addressed more explicitly in teacher education.  相似文献   

数学建模优化程序设计与数学原理的综合运用     

王福来 《中国现代教育装备》2011,(17):64-65

从符号与数值的转化、同余映射中的周期长度及分阶段执行程序等3个方面,以实际例子研究了如何在实践中运用数学原理来优化程序设计、节约运行时间,达到利于解决数学建模问题的目标。  相似文献   

Unpacking teachers’ intentions to integrate technology: A meta-analysis     

《Educational Research Review》2019

The Technology Acceptance Model (TAM) is a key model describing teachers' intentions to use technology. This meta-analysis clarifies some of the contradictory findings surrounding the relations within the TAM for a sample of 45 studies comprising 300 correlations. We evaluate the overall fit of the TAM and its structural parameters, and quantify the between-sample variation through meta-analytic structural equation modeling. The TAM fitted the data well, and all structural parameters were statistically significant. On average, the TAM variables explained 39.2% of the variance in teachers' intentions to use technology. Several sample, measurement, and publication characteristics, including teachers’ experience and the representation of the TAM variables, moderated the relations within the TAM. Overall, the TAM represents a valid model explaining technology acceptance—however, the degree of explanation and the relative importance of predictors vary across samples. Implications for further research, in particular the generalizability of the TAM, are discussed.  相似文献   

数学建模在高等数学教学中的应用实例     

关鹏  马松林 《巢湖学院学报》2011,(6):153-155

数学建模的思想已经渗入理科各个学科,而数学建模真正走进课堂还需要认真探讨与实践。分析了高等数学教学中结合数学建模思想的重要性与可行性,联系高等数学教学中的一个内容即微分方程问题,探讨了高等数学教学与数学建模的有机结合.  相似文献   

民族地区高师数学建模教育探索     

薛先贵  严忠权 《南宁师范高等专科学校学报》2011,(3):75-78

通过探讨民族地区高师数学教育教改问题与机遇,得出了数学建模教育是民族高师院校数学教育教改的重要内容的观点,并过以黔南民族师范学院数学系的数学建模为个案,探索民族地区高师数学建模教育的可行性与必要性。  相似文献   

引入企业机制 推动学生创新     

杨晋浩  施达  王伟钧 《成都教育学院学报》2011,(10):75-76

大学生创新能力的培养是数学建模活动的重要目的,要在双师型、复合型教师团队带领下,以教师科研子课题、时事热点和已就业学生求助问题等立项实行招标,引入企业机制对数学建模创新实验室进行引导和管理,对入驻项目实施流程化、规范化管理。对项目成果实行多目标提取。  相似文献   

基于偏微分方程的线性函数数据建模应用研究     

杨正校  蒋建武 《十堰职业技术学院学报》2011,24(5):104-108

通过线性函数数据建模,以偏微分方程理论为依据,使用Visual C#作为编程设计语言,通过串行通信口送入大量实验数据,并对海量数据进行实证分析,由此获取线性方程的数据建模方法,得到相应程序算法模型,在Visual C#环境下编写程序进行调试分析与测试,并详细介绍了该方法的具体设计过程,给出了关键程序代码,同时给出了利用该方法进行数据处理的一个实例。对于利用采样的海量数据获得线性函数的相关研究有一定的参考价值。  相似文献   

财经类院校的数学建模活动与学生数学素质培养     

郑永冰 《鞍山师范学院学报》2011,13(2):5-9

分析了财经院校本科专业的数学教育现状和学生数学素质培养方面存在的问题,详细阐述了大学生数学建模活动的主旨、特点及作用,指出数学建模活动在培养学生的数学素质,特别是在提高学生的创新能力方面有明显的效果.进行了两次财经院校本科生数学学习现状的问卷调查,并对调查结果进行了分析.最后,指出了大学生数学建模活动进一步深入发展的必由之路是以数学基础课为主干,实现数学基础知识与体现数学应用特点的数学模型的有机结合.  相似文献