基于STAR-CCM+的汽车挡风玻璃除霜性能提升的仿真分析与研究

采用计算流体动力学的方法,利用STAR-CCM+软件对某一车型挡风玻璃除霜性能进行数值模拟分析。通过对出风口格栅进行调整,改变了暖风气流与挡风玻璃之间碰撞角的大小与碰撞点的位置,优化了挡风玻璃表面暖风气流的分布,提升了除霜性能,为汽车除霜风道的设计和改善车辆除霜性能提供了参考。     

高职大学英语真实性课程评价方案的设计

真实性课程评价是近十几年来国际流行的课程评价方式,其能力本位的评价特点,决定其可以在高职大学英语能力培养方面起到重要作用。为实施高职大学英语真实性评价,需要根据高职各专业的英语能力需求,在英语课程评价各个环节进行真实性的设计,其中文化演练部分的评价设计是真实性评价设计的核心。     

A historical analysis of academic development using the theoretical lens of Pierre Bourdieu

This paper provides a history of academic development by examining how a South African institution coped with the potent social forces confronting it before the collapse of apartheid. Theoretically, it draws on the framework of Pierre Bourdieu and engages with a paper written a decade ago by Naidoo, who also used Bourdieu to understand institutional change in South Africa in the late 1980s. Through contrasting the habitus of two professors, it is argued that academic development helps to preserve the autonomy of the university field by refracting forces impinging on it from the economic and political realms.     

No harmless child labor: The effect of child labor on academic achievement in francophone Western and Central Africa

This study empirically examines the effect of child labor on academic achievement in 10 francophone Western and Central African countries. The data were taken from the Programme d’Analyse des Systèmes Educatifs de la CONFEMEN and comprised characteristics of 25,288 grade six students across 1803 schools. Two-stage least squares analysis highlights that child labor undermines academic achievement regardless of subject, gender, and age. It lowers reading and mathematics scores for both genders and for children under 12 and over 13 years. Child labor therefore hinders human capital accumulation in African countries, and it takes place at the cost of future prosperity.     

Outstanding performances during elite-standard short and middle-distance finals and the hyperandrogenism regulation—A detailed analysis of Caster Semenya’s results

ABSTRACT

Recently, there has been much controversy over the International Association of Athletics Federation (IAAF) regulations regarding eligibility to compete and natural testosterone levels in female athletes. Much interest lies in the analysis of Caster Semenya's extraordinary performance. The objective of this work were, a) Complete an analysis of Caster Semenya's results during the 800m finals and b) search for existing similar performances by other female athletes. We analysed the results of the finals of all IAAF World Championships and Olympic Games from 1984–2016, including the 800m results of the Diamond Leagues 2016–2018. Exponential curves were fit to the data to characterise and predict performance for each event. Caster Semenya's finishing times before her ineligibility to compete and after the suspension of the IAAF hyperandrogenism regulation were found to be 1.24% and 1.49%, respectively, faster than the characteristic performance of the elite-standard in the women’s 800m final. Other female athletes, with finishing times faster than the ones predicted by the characteristic curves were also discovered. The percentage difference in performance between Caster Semenya and the other participants did not reach 3% in the 800m event. No conclusions can be drawn regarding extraordinary results ever performed during the 100m, 200m or 400m finals.     

田径表演赛可行性探析

随着科技水平的发展，电视、多媒体网络等各种传播媒介的迅速发展，体育产业的迅速崛起，人们生活质量的提高、财富的积累，使得人们对体育的诉求也在不断的发生着变化。各种体育赛事逐步融入了表演赛，来扩大本项运动的国际影响力。由于体育明星效应，使得一些体育运动在国内一度掀起过高潮。那么，我们可以借鉴这种市场化的操作方式，从宏观的角度论述田径表演赛，通过明星效应，结合市场管理的方法，提升对田径运动兴趣，加大对田径运动知识的了解、认识，从而起到缓解瓶颈期学校体育中田径常年不受学生青睐的尴尬局面，迎来田径发展新“春天”。     

机构博物类资源数字化服务系统的设计与实现

分析机构成员产出的艺术作品、标本、各种设计实物模型等博物类智力产品,在管理和共享传播方面存在的问题。探索一种有效的博物类数字化资源组织与展示方式,建设一个可动态布展的机构博物类数字化资源建设系统,对这些资源的数字化对象进行收集、传播与共享,以提升它们在学术成果交流中的作用。已完成原型系统的建设,实现作品提交、动态布展与发布、交互展示等功能,系统试运行中,包含50多个作品的场景在普通PC或移动设备上均可实现流畅的交互。     

教师“身份”的制度与文化根源及当下危机

从历史的角度考察,中国教师的传统身份是制度型构起来的,正是通过制度的型构,才逐渐形成民间尊师重教的习俗和传统。由于教育制度的变迁,目前教师传统身份正遭遇严峻的危机,甚至民间日常生活中的尊师习俗和传统也面临着“去根化”的危险。     

物理实验操作能力的结构模型初探

中学生物理实验操作能力是物理实验能力的核心部分。本文探讨了物理实验操作能力的定义及其特点 ,并在此基础上构建了物理实验操作能力的结构模型 ,讨论了该模型的特点 ,即整体性、静态性、动态性和自调性。根据物理实验操作能力的结构模型及其特点 ,给出了物理实验操作能力的主要指标