Episode-centered guidelines for teacher belief change toward technology integration

Teachers’ episodic memories influence their beliefs. The investigation of episodic memories can help identify the teacher beliefs that limit technology-integration. We propose the Episode-Centered Belief Change (ECBC) model that utilizes teachers’ episodic memories for changing beliefs impeding effective technology integration. We also propose guidelines for using ECBC model in professional development to promote teacher belief change for effective technology integration. A preliminary study was conducted to apply the ECBC model in a teacher education course. The findings suggest that the ECBC model was effective in changing teacher beliefs regarding technology integration. Finally, the implications of the ECBC model and guidelines for research and practice are discussed.     

概率论与数理统计“金课”建设与教学改革--基于慕课的混合式教学模式的探索与实践

为了培养学生高级思维及解决复杂问题的综合能力,我们对概率论与数理统计课程开展了"金课"建设研究与实践。在原有课程建设的基础上,开发制作了概率论与数理统计在线课程,并开展了翻转课堂及线上线下混合式教学。教学内容增加了前沿性和应用性,教学方式和教学手段体现了先进性,线下教学活动具有探究性和个性化,考核方式呈现全程性和多元化。通过课程的建设和改革,成功地实现了从"传授知识型"到"培养能力型"的转变。     

Mathematics readiness of first-year college students and missing necessary skills: perspectives of mathematics faculty

College readiness of students and the effectiveness of remedial mathematics courses have been under consideration for the last two decades. There is a considerable misalignment between the expectations of students regarding secondary education and those regarding higher education. Information about current expectations and perspectives of college mathematics faculty who have to deal with this gap is missing in the literature. This study explores college readiness of first-year students and topics that they need to have mastered before entering college. A survey was disseminated to college/university mathematics faculty throughout the US (48 states) whose email addresses were shown on their institutional webpages, and data were gathered from 737 faculty. The survey instrument includes scaled items reflecting the Common Core State Standards and free response items. The scaled items are divided into six subscales: Basics, Algebra, Functions, Geometry, Statistics and Probability, and Reasoning and Generalisation. Faculty responses are categorised and statistically analysed with respect to types of institution, position titles of the participants and types of course offered by those institutions. Findings indicate that faculty view first-year students as having poor mathematical ability in terms of what they consider to be important topics for college preparation. Faculty also agree that students need remediation, which, in its current state, is not sufficient. Implications of these results for further research and practice are discussed.     

金海马养生液的营养成分和保健功效

金海马养生液含有18种游离氨基酸(总量为1.02g/L)、黄酮类和甾体类活性物质,以及磷、碘、氟、硒、铁、锌、钙等矿物质,能明显提高小鼠抗疲劳、耐缺氧能力,升高小鼠血红蛋白量、红细胞数和白细胞数;对氢化可的松阳虚小鼠,金海马养生液明显改善其体重和外观,提高脾脏和睾丸重量,增加肝组织DNA和RNA含量.     

统计分位数的一些性质

研究了统计分位数的一些性质，特别是它们与数学期望之间的关系，并归纲了统计分位数的求法，介绍了统计分位数的一些应用。     

对中等职业教育面临困境的原因分析

中等职业教育是教育体系的重要组成部分，如今，中等职业教育面临着严峻的困难，如何正确认识和分析这些问题是其进一步发展的基础。     

An optimal quality adaptation mechanism for end-to-end FGS video FGS video transmission

In this paper, we propose a novel optimal quality adaptation algorithm for MPEG-4 fine granular scalability (FGS) stream over wired network. Our algorithm can maximize perceptual video quality by minimizing video quality variation and increasing available bandwidth usage rate. Under the condition that the whole bandwidth evolution is known, we design an optimal algorithm to select layer. When the knowledge of future bandwidth is not available, we also develop an online algorithm based on the optimal algorithm. Simulation showed that both optimal algorithm and online algorithm can offer smoothed video quality evolution.     

研究性学习中科学教育与人文教育的融合

研究性学习融实践性、开放性、探究性、自主性为一体,以培养、提高学生创造性学习为核心,以激发潜能、发展个性和完善人格为重点。因此,在研究性学习的教学活动过程中,始终追求科学教育与人文教育的融合,全面提高学生的综合素质,是当前教育选择的目标,也是未来教育发展的必然趋势。     

商务英语中的委婉表达及其翻译

本文通过对商务函电和商务洽谈中的委婉表达方式的分析，讨论了如何利用语态、语气和句型等语法变化形式来进行商务英语中的委婉表达，并举例说明其对应的翻译。