基于模糊综合评判法的衡水湖水环境评价     

程凤林  马英芝  申红莲  张利民 《衡水学院学报》2015,(1)

衡水湖作为一个较大型的水环境,在对其进行综合评价时会涉及大量的复杂现象和多种复杂因素的相互作用,存在大量的模糊现象和模糊概念。选取7个测点的溶解氧、氨氮、总磷、总氮、高锰酸钾5项指标作为评价因子,使用模糊综合评判法计算得出了各测点的污染级别,用国家《地表水环境质量标准》作为参照。结果表明：测点1、3、5、6符合国家标准,测点2、4、7不符合国家标准,应该对这些测点的水域加强管理,对污染物加强处理,进一步改善水质环境。  相似文献   

基于地方文化背景的小学数学文化的探讨     

姚琦 《科教文汇》2015,(15)

孩子是祖国的未来,如何让孩子在优秀的文化背景中健康成长是我们每一个教育工作者首要考虑的问题。作者作为一名地方一线的教育工作者,将以数学为背景结合当地的文化特色,浅析随着社会的发展,各地文化及小学数学对孩子的影响。作者还考虑怎样把生活问题数学化,在数学化的同时又体现了数学在实际中的应用。通过教与实践相结合,以达到让学生认识数学、可以把生活问题数学化的目的。这样既可以培养学生创新精神和实践能力,同时还可以提高学生数学素养。  相似文献   

数学分析思想在高中数学解题中的应用     

麦康玲 《科教文汇》2015,(15)

数学是一门逻辑性和严谨性都较高的学科,而且在解题时所采用的各种数学方式也间接体现了学科本身的这种特性,所以教师和学生越来越注重数学解题技巧和数学分析思想的学习,尤其是在近些年的数学高考中,具备数学分析思想有着明显的优势,而本文也将主要研究数学分析思想在高中数学解题中的应用,以便进一步提高学生的解题效率。  相似文献   

Studying culture-cognition relations in collective practices of daily life: a research framework / El estudio de las relaciones cultura-cognición en las prácticas colectivas cotidianas: un modelo de investigación     

Geoffrey B. Saxe 《Infancia y Aprendizaje》2015,38(3):473-508

This article sketches a framework for the study and analysis of culture-cognition relations that I present in my recent book, Cultural Development of Mathematical Ideas: Papua New Guinea Studies. Taking an historical approach, I focus on the reproduction and alteration of representational forms for number and the functions that representational forms serve in collective practices in and out of school. My key argument is that, in the context of their goal-directed communicative activities in collective practices in daily life, people unwittingly reproduce and alter representational forms and the functions that these forms serve. The process leads to continuities and discontinuities in form-function relations in communities over historical time. To provide evidence for this process and its role in the cultural development of ideas, I report selected findings from research conducted in 1978, 1980 and 2001 in Oksapmin communities; I focus on historical shifts in the forms and functions of the Oksapmin body part counting system over time. I then update that body of research with a sketch of a recent 2014 follow-up study. I close with reflections on the utility of my framework for the study of culture-cognition relations in other communities and on cognitive domains other than mathematics.  相似文献   

基于博弈理论数学模型的人才培养策略解析     

舒译苇 《成才之路》2020,(3):88-89

经济和社会的高速发展使得人力资源竞争逐渐成为国际竞争的核心,特别是高素质人才的培养已经成为制约我国经济持续发展的关键。文章根据博弈论的基本概念和研究思路,用纳什非合作博弈理论数学模型解析人才培养策略。  相似文献   

小学四年级学生对平均数概念理解的发展过程   总被引：1，自引：0，他引：1  

吴骏 《数学教育学报》2011,(3):39-41,102

利用Pirie和Kieren提出的数学理解发展模型,分析了3名小学四年级学生对平均数概念理解的发展过程.结果表明:学生对平均数概念的理解经历了初步了解、产生表象、形成表象、关注性质和形式化等5个水平.在理解发展过程中,当学生发现他的思想和行动与自己所面临的问题不一致时,他就要折返回内层水平来扩展自己目前的活动能力和活动空间.而教师的干预则激发了学生的折返,为学生提供了独立建构或修正个人表象的机会.  相似文献   

Mathematical modelling as a tool to assessment of loads in volleyball player’s shoulder joint during spike     

Jacek Jurkojć  Robert Michnik  Krzysztof Czapla 《Journal of sports sciences》2017,35(12):1179-1186

This article deals with kinematic and kinetic conditions in volleyball attack and identifies loads in the shoulder joint. Joint angles and velocities of individual segments of upper limb were measured with the use of the motion capture system XSENS. Muscle forces and loads in skeletal system were calculated by means of mathematical model elaborated in AnyBody system. Spikes performed by players in the best and worst way were compared with each other. The relationships were found between reactions in shoulder joint and flexion/extension, abduction/adduction and rotation angles in the same joint and flexion/extension in the elbow joint. Reactions in shoulder joint varied from 591 N to 2001 N (in relation to body weight [BW] 83–328%).

The analysis proved that hand velocity at the moment of the ball hit (which varied between 6.8 and 13.3 m s^–1) influences on the value of reaction in joints, but positions of individual segments relative to each other are also crucial. It was also proved in objective way, that position of the upper limb during spike can be more or less harmful assuming that bigger reaction increases possibility of injury, what can be an indication for trainers and physiotherapists how to improve injury prevention.  相似文献   

Increasing engagement of students with learning disabilities in mathematical problem‐solving and discussion     

Rachel Lambert  Trisha Sugita 《Support for Learning》2016,31(4):347-366

Engagement in problem‐solving and mathematical discussion is critical for learning mathematics. This research review describes a gap in the literature surrounding engagement of students with Learning Disabilities in standards‐based mathematical classrooms. Taking a sociocultural view of engagement as participation in mathematical practices, this review found that students with LD were supported towards equal engagement in standards‐based mathematics through multi‐modal curriculum, consistent routines for problem‐solving, and teachers trained in Mathematical Knowledge for Teaching. Using this small set of studies (7), we identify the need to deepen the engagement of students with LD in mathematical problem‐solving and discussion. This review concludes with implications for teaching and learning.  相似文献   

概率论与数理统计课程的教学改革——以创新创业教育为导向     

王剑凌 《科教文汇》2020,(7):57-58,86

在大众创业、万众创新的背景下,创新创业教育是高校教学改革的突破口。案例教学法是将理论与实践相结合的重要教学方法,对培养创新型人才有积极意义。文章以创新创业教育为导向,应用案例教学法开展概率论与数理统计课程的教学实践。通过深入分析概率论与数理统计课程的教学现状,探讨案例教学法的教学优势,提出教学改革思路——建立完整的案例库、理论与实践并重,在教学实践中取得了良好的教学效果。  相似文献   

高等数学“情境—问题”的教学实践——“数列的极限”教学案例     

赵玉亮  华守亮 《安阳工学院学报》2011,10(6):112-114

极限思想是高等数学中的重要思想,我们在数列的极限教学过程中,通过设置问题情境,加深了学生对极限概念的理解,培养了学生发现问题、分析问题、解决问题的能力。  相似文献