Motivating Inquiry in Statistics and Probability in the Primary Classroom          下载免费PDF全文

Aisling Leavy  Mairéad Hourigan 《Teaching Statistics》2015,37(2):41-47

We describe how the use of a games environment combined with technology supports upper primary children in engaging with a concept traditionally considered too advanced for the primary classes: The Law of Large Numbers.  相似文献   

大档案概念的若干观点简评     

王茂跃 《北京档案》2015,(1)

本文对“大档案”概念的一些观点进行了评析,笔者认为“大档案”概念有其产生的合理性,在“大档案”概念具有多种内涵的情况下,从专业术语规范的角度看,应尽量避免使用“大档案”概念的提法,而采用较为规范、正式的专业术语。  相似文献   

合作学习法在英语专业大班教学语音学习中的运用     

王冬梅 《临沧师范高等专科学校学报》2007,(3):51-54

分析了大班教学对英语专业学生语音、语调学习的不利影响,并在此基础上侧重探讨了合作学习法在大班教学英语专业学生语音语调学习中的运用。  相似文献   

Large Context Problems and Their Applications to Education: Some Contemporary Examples     

Ian Winchester 《Interchange》2006,37(1-2):7-17

Some 35 years ago, Gerard K. O’Neill used the large context of space travel with his undergraduate physics students. A Canadian physics teacher, Art Stinner, independently arrived at a similar notion in a more limited but, therefore, more generally useful sense, which he referred to as the “large context problem” approach. At a slightly earlier time the large context problem type of approach had already been used in the study of medicine, pioneered by McMaster Medical School. And the Faculty of Education at the University of Calgary currently uses a large context problem method to deliver its entire curriculum. These approaches are four distinct ways of presenting large context problems to students. This paper will discuss these approaches historically, look at their grounds and their applications, weigh their successes and characterize their limitations. It will try to see what they take most deeply for granted as viable approaches to teaching science, both theoretical and applied. Finally, it will relate these approaches to the constructivist prejudices of our own time, suggesting their relation to earlier forms of philosophical idealism.  相似文献   

关于编纂“大华语词典”的设想与建议     

徐复岭 《济宁师范专科学校学报》2014,(5):24-28

社会呼唤一部描写现当代世界各地华语词汇全貌、满足各华语社区读者需要的全球性华语工具书——"大华语词典"。编纂一部这样的词典目前不仅是必要的,而且是可行的。该词典应当具有描写性、共时性、实用性的特色,它除具有解疑备查功能外,还应具有文化功能和语用功能等。最后,并对该词典的编写工作、运作方式等提出一些设想和建议。  相似文献   

Design of automatic climbing controller for large civil aircraft     

Huajun Gong  Ziyang ZhenXin Li  Ju JiangXinhua Wang 《Journal of The Franklin Institute》2013

This paper focuses on automatic climbing control methods for large civil aircraft. The key technique is how to design automatic flight control laws that meet the requirements of flight performance indexes and have good characteristics of restraining various disturbances. The classical engineering methods are used to solve the above problem. Based on the aerodynamic data of Boeing707, a nonlinear model of large civil aircraft is established. Linear models which are divided into longitudinal and lateral equations are obtained by trim and linearization. The design of longitudinal control laws uses C^? criterion, three climbing schemes including pitch control mode, vertical velocity control mode and altitude control mode are designed and mutually compared. For lateral control problem, by the feedback angle of sideslip, the bank attitude control with good effect is achieved. The simulation results indicate the designed control laws can meet the requirements of performance indexes, and have satisfied characteristics of anti-gust disturbance.  相似文献   

大体积混凝土设备基础冬季施工中的裂缝控制     

宋鹏飞  李健  迟作进 《辽宁科技学院学报》2012,14(1):34-35,61

文章介绍了大体积混凝土设备基础冬季施工中的裂缝控制技术,结合工程实例,从材料选择、施工措施、温控措施三方面加以阐述,为类似工程施工提供借鉴经验。  相似文献   

公共课教育学大班教学的困境与对策     

李瑛 《巢湖学院学报》2012,(2):127-131

近年来,高校扩招使得教学资源相对短缺,公共课教育学大班教学成为普遍现象,面临着学科地位尴尬、教学内容僵化庞杂、课堂缺乏吸引力、教学秩序差、师生关系不融洽等困境,学生厌学,教师厌教,降低了教学成效。必须采取有效措施,促进公共课教育学大班教学尽快走出窘境,真正发挥其在师范生专业培养中的独特作用。  相似文献   

Evaluation of sodium nitrite as a corrosion inhibitor for USS Monitor artifacts     

none 《文物保护研究》2013,58(4):253-266

Abstract

The use of sodium nitrite (NaNO₂) as a corrosion inhibitor for wet archeological metal objects presents potential advantages of near neutral pH, low concentration, effectiveness on several metals, and compatibility with organic materials. The effectiveness of NaNO₂ as a corrosion inhibitor for storage of chloride-containing marine archeological metal objects from the wreck of the USS Monitor was evaluated using marine-corroded carbon steel analogs. The samples were tested in varying concentrations of NaNO₂ and evaluated visually and by monitoring solution chemistry using ion chromatography (IC). It was found that a concentration of 1000 ppm NaNO₂, replaced four times, was effective at protecting corroded carbon steel in the presence of chlorides. Nitrite solutions were no more rapid than sodium hydroxide (NaOH) at extracting chlorides from marine steel at equal concentrations and were considerably slower than 2% NaOH. IC analyses indicated that NO₂ does not easily oxidize to NO₃ under normal conditions, but does so readily when a polarizing current is applied, making nitrites unsuitable for electrolytic reduction treatments. Sodium nitrite does show promise as a storage solution prior to desalination of marine metals or after desalination to prevent flash corrosion during rinsing baths.  相似文献   

大型体育场馆周边地区产业开发研究——基于西安市的个案研究     

成彦开  张金桥 《四川体育科学》2013,(6):4-7,11

运用文献综述、实地调查、逻辑分析等方法,以西安市的三大体育场馆——陕西省体育场、西安城市运动公园、陕西省体育训练中心为例,对大型体育场馆周边地区产业开发情况进行研究。研究发现：大型体育场馆周边产业开发存在着一些相同之处,但在开发的种类、规模、侧重点上也表现出明显区别。大型体育场馆周边地区产业开发出现差异与场馆的地理位置、周边活动人群、功能定位等有着密切关系。在以上分析的基础上,结合各大场馆自身的特点,提出了相应的对策建议。  相似文献