塑料餐盒中有毒有害成分迁移量检测研究     

许月明  杨靖东  曾惠琴  程旺开 《滁州学院学报》2013,(2):77-79,103

塑化剂风波后,越来越多的人开始关注与食品直接接触的塑料类包装材料的安全,本文针对市场常见的几种塑料餐盒进行模拟溶媒溶出试验,以GB/T 5009.60-2003《食品包装用聚乙烯、聚苯乙烯、聚丙烯成型品卫生标准的分析方法》的标准为依据,分析塑料餐盒中有毒有害成分的迁移情况,并针对研究结果提出几点参考意见和建议。  相似文献   

从S²到CPⁿ 的共形极小浸入     

陈红霞  焦晓祥 《中国科学院大学学报》2008,25(4):452-459

通过李群、活动标架,以及调和映射来研究从S²到CPⁿ的共形极小浸入．首先,用一种新方法证明Bolton的一个定理,从S²到的全纯曲线在差一个刚动的情况下由度量唯一决定;其次,利用从 S²到CPⁿ的共形极小浸入来构造从S²到G_2,n+1的共形极小浸入;最后,如果φ 是从S²到CPⁿ 的全实共形极小浸入,且φ 是常曲率的,则可以找出具体的等距变换ｇ,使得ｇφ 包含在RPⁿCPⁿ中．  相似文献   

The influence of water depth on kinematic and spatiotemporal gait parameters during aquatic treadmill walking     

Taeyou Jung  Yumi Kim  Hyosok Lim  Konstantinos Vrongistinos 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(3):297-307

The purpose of this study was to investigate kinematic and spatiotemporal variables of aquatic treadmill walking at three different water depths. A total of 15 healthy individuals completed three two-minute walking trials at three different water depths. The aquatic treadmill walking was conducted at waist-depth, chest-depth and neck-depth, while a customised 3-D underwater motion analysis system captured their walking. Each participant’s self-selected walking speed at the waist level was used as a reference speed, which was applied to the remaining two test conditions. A repeated measures ANOVA showed statistically significant differences among the three walking conditions in stride length, cadence, peak hip extension, hip range of motion (ROM), peak ankle plantar flexion and ankle ROM (All p values < 0.05). The participants walked with increased stride length and decreased cadence during neck level as compared to waist and chest level. They also showed increased ankle ROM and decreased hip ROM as the water depth rose from waist and chest to the neck level. However, our study found no significant difference between waist and chest level water in all variables. Hydrodynamics, such as buoyancy and drag force, in response to changes in water depths, can affect gait patterns during aquatic treadmill walking.  相似文献   

美国当前的双语教育改革   总被引：10，自引：0，他引：10  

余强 《比较教育研究》2003,24(6):45-48,53

美国的传统双语教育制度形成于20世纪印年代末，30多年来没有什么重大变化。但是近年来，公众对传统的过渡式双语教育越来越不满，于是由民间发起了一场用英语浸入式取代传统双语教育的改革运动。加利福尼亚州于1998年通过了改革法案，几年来学生的英语和学科成绩都有显著提高。到目前为止，亚利桑那州和马萨诸塞州也已通过了类似加州的双语教育改革法案。  相似文献   

Parsing the language of racism and relief: Effects of a short-term urban field placement on teacher candidates’ perceptions of culturally diverse classrooms     

Elizabeth Bleicher 《Teaching and Teacher Education》2011,27(8):1170-1178

This three-year study combines qualitative and quantitative analyses of effects of a one-week, intensive urban field placement on 95 suburban and rural teacher candidates’ self-reported perceptions of urban schools, students, teachers. Data was drawn from anonymous, open-ended, pre- and post-experience participant surveys; reflections; and alumni interviews. Findings include improvement in confidence in cross-cultural teaching abilities and interest in urban schools for future employment. Pre-service teachers’ perceptions can be meaningfully influenced by a short-term, cross-cultural immersion program when it is situated within a mutually-reinforcing, multicultural education curriculum that offers significant faculty scaffolding and structured reflection.  相似文献   

汉语国际教育专业海外沉浸式实践教学探索——以成都大学为例     

刘云春  孔稚凤 《绵阳师范学院学报》2015,(6):64-68

地方本科高校的办学理念和办学特色转向应用技术、职业教育类型要求汉语国际教育专业淡化学科、强化专业。作为地方城市型大学的成都大学近年已经开始实践教学模式探索,开辟了学生赴泰国实习的沉浸式实践教学模式。成都大学汉语国际教育专业从集中实践课程入手,提升集中实践学时总比重,打破学分学年制传统的壁垒,开拓学分制课程体系的改革空间,为人才培养模式提供了卓有成效的贡献和大量可资借鉴的经验。这一措施既服务了城市的兴市战略,又摸索出了极具特色的办学理念。2014年,成都大学汉语国际教育被列为成都市市级重点学科(专业)。  相似文献   

加拿大浸入式教学模式对我国高校学生跨文化交际能力培养的启示     

张天凝 《海外英语》2015,(6)

我国高校学生英语已达到一定水平,但跨文化交际能力却相对滞后。从概念、原则、分类等方面对“浸入式”教学法进行分析,并与现阶段国内高校英语教学实际情况相结合,探讨在对国内高校学生跨文化交际能力培养方面“浸入式”英语教学法的重要作用：加强教师队伍素质的提高,切实提升学生跨文化交际能力;对英语教学实施综合性改革,加强学生跨文化交际能力的培养;为学生跨文化交际能力的提高创造积极的跨文化氛围。  相似文献   

A new juncture in indigenous language education The impact of the experience of Maori education     

KE Wen-Li 《美中教育评论》2010,7(9):25-33,67

If Taiwan＇s indigenous people are not able to save their own languages, they will lose their ways of thinking, cultural heritage, and the relation to the rest of the universe that distinguishes them as indigenous peoples. Taiwan is a multi-ethnic country. Although the majority of the population is comprised of Han speakers, there is also a significant indigenous Austronesian-speaking population. The multiple cultural manifestations of the indigenous people of Taiwan enrich the overall culture of Taiwan＇s society. Under the influences of globalization and colonial governance, indigenous peoples are facing the disappearance of their traditional languages and cultures. Therefore, Taiwan needs to carefully handle the topic of the development of its people＇s cultures; otherwise, it is not difficult to see the outcome of cultural assimilation due to encroachment by mainstream cultural dominance. Education is the best method of helping protect and revitalize non-dominant cultures and their languages; by the same token, it is also the most effective means of cultural assimilation. What course should indigenous education take？ From the development of local culture subject to current stage of dialects subject, indigenous languages are still highly subject to the nightmare of extinction. Thus, in this paper, the author analyzes the development status of Maori education in New Zealand, with the aim of providing Taiwan＇s education authorities with different viewpoints for consideration so that appropriate educational methods may be applied for the development of indigenous people, and also appeal to Taiwan＇s indigenous people to take on the challenge of ridding themselves of the rigid modes of thought caused by colonial education, and, from the bottom-up, contribute their efforts for the sake of revitalizing the languages and cultures of their people.  相似文献   

内容语言模式在商务英语课程中的实践     

张洁 《黑龙江教育学院学报》2010,29(11)

内容教学法融语言学习与内容学习为一体,对中国高校复合型外语专业教学有一定的启发作用,尤其适合商务英语课程的教学特点和复合型人才培养模式。阐述内容教学法的含义、理论基础及发展过程,结合中国高校商务英语专业的教学要求、课程特点和教学模式,分析内容教学模式的适用范围、应用前景、实践模式和未来趋势,旨在提高高校复合型外语专业的教学质量。  相似文献   

Research on Bilingual Education in China     

王芳 《海外英语》2014,(22)

It is acknowledged that bilingual educaiton,as a new way in teaching,has attracted much attention in China for several years.This language policy gains praises from supporters but also causes lots of controversies with its relevant limitations.The present paper provides a brief review of the broad historical development of bilingual education in China,analyzes the unsolved problems and offers some recommendations for bilingual education to make it develop more smoothly and successfully.  相似文献