六盘水师范学院数学建模参赛历程及其思考     

郭亚丹  王胜文  宁宝权 《六盘水师范高等专科学校学报》2014,(3):74-77

数学建模是运用数学知识、思想和方法解决实际问题的过程。回顾六盘水师范学院在全国大学生数学建模参赛历程的基础上,提出了扩大信息宣传、加强师资培训、扩充参赛人员、科学安排培训时间及培训内容、发挥团队作用、改革课程设置、改善实验条件、健全奖励机制等建议,提高师生数学建模意识和能力,提升学院的办学品味和知名度。  相似文献   

素描教学“造型密码”的探析——以人物头像为例     

刘蔚明 《扬州教育学院学报》2014,(1):83-85

素描作为一门伟大的艺术,几乎蕴含造型艺术的全部秘诀,人类从古代涂鸦开始就一直试图接近秘诀的核心——造型密码。笔者以数十年素描研究和素描教学为基础,将头像素描造型中探索到的“造型密码”以文字方式叙述,从线性密码、结构密码、光影密码三个方面进行探析。  相似文献   

基于SEM模型的中学生体育健康行为调查研究     

劳家杰  顾栩名  汤根 《体育科技文献通报》2022,(1)

运用文献资料法、数理统计法、调查法,根据我国健康行为教育开展情况,构建中学生体育健康行为干预模型,通过分析模型得出对中学生体育健康行为干预首要考虑的是情绪调控,其次分别是健康知识、锻炼意识及环境适应,并给出在体育教学中实际中学生健康行为发展干预的相关建议,明确体育健康行为教育的目的性、有效性,为当前学校体育教育落实提升学生核心素养提供力所能及的帮助。  相似文献   

基于HLM模型的阅读素养影响效应研究 ——以我国四省市PISA 2018阅读素养数据为例          下载免费PDF全文

胡洁  王美姝 《情报科学》2022,39(2):127-132

【目的/意义】阅读素养作为人类语言发展和认识世界的重要途径,越来越引发全球的关注,对影响阅读素 养的因素及其机理进行探讨,有利于促进学生阅读能力的发展,为我国推行卓越阅读教育提供有效路径。【方法/过 程】本研究基于教育生产力心理学理论,依托全球权威的大规模学生素养的国际测试——国际学生评估项目（Pro? gramme for International Student Assessment,简称 PISA）中的阅读素养数据库,采用多层线性模型（Hierarchical Lin? ear Modeling,简称 HLM）为研究方法,从多维度对我国四省市 361所学校 11,993名的阅读素养数据进行分析。【结 果/结论】研究结果表明学习者个人能力、教学情况以及社会心理因素均对阅读素养有显著影响,且不同因素对阅 读素养影响效应不同。【创新/局限】本研究通过学生个体因素和学校环境不同层级数据间的联合效应和多维影响, 分析影响我国四省市学生阅读动态发展的因素,较为准确地还原了阅读教育系统的全貌,促进我国阅读教育质量 和教育治理能力的提升。  相似文献   

贺兰山岩画中原始体育活动的审美特征     

王昌伟 《军事体育进修学院学报》2014,33(4):83-85

贺兰山岩画中的舞蹈岩画赋予艺术表象的动作美,巫师作法岩画表达艺术意象的意蕴美,狩猎岩画传递出艺术神韵的意境美。贺兰山岩画中的原始体育活动具有鲜明的审美特征,这是从美学的角度对岩画中原始体育活动作出的一种全新表述和真实写照。  相似文献   

关于3DS MAX建模技术及其优化的研究     

沈晓芸  钱燕婷 《科教文汇》2014,(25):112-113

三维建模是开发虚拟现实产品的过程中重要技术之一。在虚拟场景进行构造时,建模技术的日渐成熟已使得建模手段逐渐丰富,加之工具的辅助作用,也使得当前建模出现了众多版本与技术类型。文章在分析建模手段的基础上,针对3DS MAX建模技术进行了综合介绍,并在研究建模过程中的优化问题时,重点对模型优化技术展开了论述,以期能有效发挥3DS MAX建模技术的功能,促使模型的利用效率得到提升。  相似文献   

独立学院数学建模培训模式的探索与改革     

董立伟  温晓楠 《环球赛鸽科技》2014,(26)

随着独立学院的蓬勃发展,独立学院报名参加数学建模竞赛的队伍越来越多,但很多学院的成绩不理想。本文从数学建模的培训模式这方面出发,根据近几年的实践,总结了教改的经验,提出了一套有效的培训模式。  相似文献   

Computational fluid dynamics (CFD) modeling of microclimate for salts crystallization control and artworks conservation     

《Journal of Cultural Heritage》2014,15(4):448-457

Many deterioration processes are linked to unsuitable microclimatic condition in cultural buildings. One of the most diffused processes is soluble salts crystallization that can be accelerated in masonry structures within specific microclimatic values for different chemical compounds. In this paper, microclimate and efflorescence diffusion were monitored over a one-year period in the Crypt of the Cathedral of Lecce (South Italy). This allowed to relate the microclimate with the efflorescence variation over time. A three-dimensional computational fluid dynamics (CFD) model was then developed to detail the thermo-hygrometric parameters and airflow patterns responsible for salts crystallization and artworks deterioration. Two main conditions were reproduced; one to simulate the current microclimate, which simulations showed to be inadequate for conservation, and the other to search for a more appropriate solution. In both cases, summer and winter conditions were simulated and compared to find a microclimate able to ensure more suitable thermo-hygrometric intervals required by the constituting artworks materials. The results helped to suggest actions to improve maintenance of the Crypt.  相似文献   

How does education have an impact on ethnocentrism? A structural equation analysis of cognitive,occupational status and network mechanisms     

Cecil Meeusen  Thomas de Vroome  Marc Hooghe 《Int J Intercult Relat》2013

Previous studies have distinguished cognitive, occupational status and network mechanisms in the relation between education and ethnocentrism. Hypotheses on these mediating mechanisms are derived from socialization theory, realistic group threat and contact theory. In the current study we use structural equation modeling to investigate the explanatory power of these three mechanisms simultaneously. The analysis is based on a representative population survey from the Netherlands (NELLS 2009, n = 1910). The results show that more than half of the initial association between education and ethnocentrism can be attributed to cognitive ability and occupational status mechanisms. The remaining part of the overall association, however, still has to be modeled as a direct relationship between education and ethnocentrism. This direct association can be attributed either to social desirability or to a direct liberalizing effect of education on social and political attitudes. Our analysis tentatively suggests that the rise of average education levels in Western societies might lead to less ethnocentric attitudes via the cognitive sophistication mechanism.  相似文献   

Childhood trauma and neighborhood-level crime interact in predicting adult posttraumatic stress and major depression symptoms     

《Child abuse & neglect》2016

Previous research has identified several individual-level factors that modify the risk of childhood trauma on adult psychiatric symptoms, including symptoms of major depression (MD) and posttraumatic stress (PTS). Neighborhood-level factors also influence the impact of individual-level exposures on adult psychopathology. However, no prior studies to our knowledge have explored cross-level interactions between childhood trauma and neighborhood-level factors on MD and PTS symptoms. The purpose of this study was therefore to explore cross-level interactions between a neighborhood-level factor – neighborhood-level crime – and childhood trauma on MD and PTS symptoms. Participants in this study (N = 3192) were recruited from a large public hospital, and completed self-report inventories of childhood trauma and MD and PTS symptoms. Participant addresses were mapped onto 2010 census tracts, and data on crime within each tract were collected. Multilevel models found a significant cross-level interaction between childhood trauma and neighborhood crime on MD symptoms, such that the influence of high levels of childhood trauma on MD symptoms was enhanced for participants living in high-crime neighborhoods. Supplementary analyses found variation in the strength of cross-level interaction terms by types of childhood trauma and crime, with the strongest associations including emotional neglect paired with personal and property crime. The results provide preliminary support for interventions that help childhood trauma survivors find housing in less vulnerable neighborhoods and build skills to cope with neighborhood crime.  相似文献