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71.
周雪香 《赣南师范学院学报》2012,(1):81-87
清代汀州两江流域经济发展并不平衡。由于农耕条件的不同,两江流域不论是在经济作物的种植,还是在工商业活动方面,均表现出明显的差异,闽江流域上游三县比汀江流域诸县逊色得多。 相似文献
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Kyriaki Dimitriadi Krystallia Halkia 《International Journal of Science Education》2013,35(16):2565-2582
A major topic that has marked ‘modern physics’ is the theory of special relativity (TSR). The present work focuses on the possibility of teaching the basic ideas of the TSR to students at the upper secondary level in such a way that they are able to understand and learn the ideas. Its aim is to investigate students' learning processes towards the two axioms of the theory (the principle of relativity and the invariance of the speed of light) and their consequences (the relativity of simultaneity, time dilation and length contraction). Based on an analysis of physics college textbooks, on a review of the relevant bibliography and on a pilot study, a teaching and learning sequence consisting of five sessions was developed. To collect the data, experimental interviews (the so-called teaching experiment) were used. The teaching experiment may be viewed as a Piagetian clinical interview that is deliberately employed as a teaching and learning situation. The sample consisted of 40 10th grade students (aged 15–16). The data were collected by taping and transcribing the ‘interviews’, as well as from two open-ended questionnaires filled out by each student, one before and the other after the sessions. Methods of qualitative content analysis were applied. The results show that upper secondary education students are able to cope with the basic ideas of the TSR, but there are some difficulties caused by the following student conceptions: (a) there is an absolute frame of reference, (b) objects have fixed properties and (c) the way events happen is independent of what the observers perceive. 相似文献
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Tommy Lind 《Scandinavian Journal of Educational Research》2019,63(3):333-346
Governmental reforms since the early 1990s have acted as a push factor for starting new schools in Sweden and have created options for pupils to choose a school irrespective of municipal borders. This study highlights the upper secondary school system in small municipalities in northern Sweden since the late 1990s. The analysis shows that the reforms led to more schools, and thereby also to more competition in recruiting pupils both within and across municipal borders. When the cohorts started declining, the vulnerability of the school structure became obvious. The competition generated higher costs per capita and fewer available programs in small municipalities. Furthermore, it was noted that fewer pupils attending schools in small municipalities completed their education compared to those in larger municipalities. 相似文献
76.
元代在中外科技交流方面占有重要地位。笔者对元代科技交流从宏观上进行探讨 :( 1)交流的一般情况 ;( 2 )交流发展的原因 ;( 3)上都在交流中的作用 ;( 4)交流的特点 ;( 5 )经验教训。 相似文献
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研究了Banach空间中两类混合拟平衡问题,运用不动点定理,得到了解的存在性定理．其结果改进并进行了推广了． 相似文献
79.
积分上限可变动的函数是积分学的一个重要部分,研究与之相关的一类函数,从被积函数的性质导出所构造的函数的性质,给出了几个重要结论· 相似文献
80.
Peter Petocz 《Teaching Statistics》2005,27(2):42-44
This article disproves a conjecture that the ratio of the maximum standard deviation to the range of a set of data decreases as the number of data points increases. It also provides an alternative and more general approach for examining the standard deviation as a function of the range. 相似文献