共查询到20条相似文献，搜索用时 551 毫秒
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[教学内容]苏教版小学数学第十一册第94～96页。[教学目标]1.使学生初步理解并掌握用分数表示可能性大小的基本思考方法,会用分数表示简单事件发生的可能性,进一步加深对可能性大小的认识。2.使学生在学习用分数表示可能性大小的过程中,进一步体会数学知识间的内在联系,感受数学思考的严谨性与数学学习的趣味性。[教学重点]理解并掌握用分数表示可能性的大小。[教学难点]在认识事件发生的不确定现象中感受统计 相似文献
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教学内容苏教版六年级上册第94～95页。教学目标1.使学生初步理解并掌握用分数表示可能性大小的基本思考方法,会用分数表示简单事件发生的可能性,进一步加深对可能性大小的认识。2.使学生在学会用分数表示可能性大小的过程中,进一步体会数学知识间的内在联系,感受统计概率的数学思想。 相似文献
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张鸿鸣 《学生之友(小学版)》2009,(23):54-54
教学内容：
六年级上册第94、95页例1、例2及＂试一试＂＂练一练＂和练习十八第1、2题。
教学目标：
1.使学生初步理解并掌握用分数表示可能性大小的基本思考方法,会用分数表示简单事件发生的可能性,进一步加深对可能性大小的认识。 相似文献
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张鸿鸣 《学生之友(小学版)》2009,(12):54-54
教学内容:六年级上册第94、95页例1、例2及"试一试""练一练"和练习十八第1、2题。教学目标:1.使学生初步理解并掌握用分数表示可能性大小的基本思考方法,会用分数表示简单事件发生的可能性,进一步加深对可能性大小的认识。 相似文献
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成义森 《数学学习与研究(教研版)》2009,(8):48-48
教学内容 苏教版小学数学六年级（上）第94～96页例1、例2及＂试一试＂、＂练一练＂及相关习题.
教学目标 1.让学生理解并掌握用分数表示可能性大小的基本思考方法,会用分数表示简单事件发生的可能性,进一步加深对可能性大小的认识． 相似文献
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【教学内容】苏教版六年级上册第94~96页例1、例2及“试一试”、“练一练”和练习十八的第1、2题。【教学目标】1.理解并掌握用分数表示可能性大小的基本方法,会用分数表示简单事件发生的可能性,进一步加深对可能性大小 相似文献
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A new representation of the Maxwell relation for phase transformation is given, which is expressed in simpler form and has more direct physical meaning than the original Maxwell relation. It is shown that the physical conjecture for the so-called “lock-up” condition suggested by Jensen （1999） is correct, but the equation for the “lock-up” condition suggested by Jensen （1999） is not. Numerical examples also demonstrate that the application of the new representation of Maxwell relation gives exactly the same solutions as the ones with application of the original Maxwell relation and, however, application of the “lock-up” condition gives no real solutions. 相似文献
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Beatriz Ruivo 《International Journal of Science Education》2013,35(3):385-391
Women's representation in scientific research in countries with differing levels of development is analysed. The under‐representation of women in this area is worse in developed countries than in the group of semi‐industrialized and newly industrialized countries. In countries which were late to industrialize, the development of science took place at a stage when women's economic and social participation was more acceptable. Moreover, in developing countries the links between research and the productive system are weak. Both facts are connected with greater discrimination against women in scientific research in developed countries. Within the framework of long‐term economic cycles and technological change, some assumptions can be made about the future. This approach can be used to set up a theoretical framework for women's strategies. 相似文献
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A sinusoidal representation of speech and a cochlear model are used to extract speech parameters in this paper, and a speech analysis/synthesis system controlled by the auditory spectrum is developed with the model. The computer simulation shows that speech can be synthesized with only 12 parameters per frame on the average. The method has the advantages of few parameters, low complexity and high performance of speech representation. The synthetic speech has high intelligibility. 相似文献
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Alain Quiamzade 《European Journal of Psychology of Education - EJPE》2007,22(3):243-258
This study (N=75) examined the influence dynamics that take place between two competent individuals presenting divergent solutions
for a cognitive task. The hypothesis was that such settings (i.e., conflict of competencies) are unlikely to have a positive
effect on intellectual performance because of the representation of the task, and that an increase in performance may be found
if such a representation is modified. Three conditions were examined: a control condition in which participants completed
the task by themselves, a conflict of competencies condition in which participants declared to be highly competent where confronted
with a equally highly competent (bogus) partner who offered diverging solutions (standard conflict of competencies condition),
and a conflict of competencies condition in which a decentring procedure was induced to modify the representation of the task.
The results showed that participants in the decentring condition solved the task better compared to the standard conflict
of competencies condition and the control condition. However, the results unexpectedly revealed imitation in the two conflict
of competencies conditions compared to the control condition. Complementary analyses suggest that in the standard conflict
of competencies condition imitation corresponds to a defensive motivation. 相似文献
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开发了一套可在控温、控湿环境中开展不同形态薄层液膜下CO2腐蚀测试的实验装置,以适应薄层液膜下的CO2腐蚀机制及规律研究需求。实验装置主要由环境控制系统、液膜厚度测量系统和腐蚀电化学测试系统组成。环境控制系统主体为有机玻璃做成的密闭环境腔,既可以开展控温、控湿以及承压环境下的实验测试,同时又可方便地观察腔体内情况。薄层液膜形态包括不同厚度的均一液膜和存在厚度梯度的不均一液膜,由液膜厚度测量系统获得不同液膜形态下的CO2腐蚀行为。结果表明:金属CO2腐蚀速率随液膜厚度的不同而不同,液膜厚度相同但均一性不同时,CO2腐蚀行为也存在差异。 相似文献
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The trouble with transfer: insights from microgenetic changes in the representation of numerical magnitude 总被引：1，自引：0，他引：1
Spontaneous transfer of learning is often difficult to elicit. This finding may be widespread partly because pretests proactively interfere with transfer. To test this hypothesis, 7-year-olds' transfer was examined across 2 numerical tasks (number line estimation and categorization) in which similar representational changes have been observed. As predicted, children given feedback on numerical estimates learned to use a linear representation of numerical quantity instead of a logarithmic one, but providing practice on a categorization pretest led children to continue using a logarithmic representation on the same task, which they otherwise abandoned with surprising frequency. These findings imply unsupervised practice of inappropriate representations impedes transfer, and studies of learning can greatly underestimate children's potential for transfer if pretest effects are uncontrolled. 相似文献
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提出了一种新的修正共轭梯度算法．此算法的优点是无需线性探索迭代方向就具有充分下降性,并且采用了一种新的Armijo线性搜索技术．在较弱的条件下,证明了方法的全局收敛性． 相似文献
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混沌的同步和控制是混沌领域的一个重要研究课题,而分数阶混沌系统开始逐渐引起广泛的关注．主要研究了一类新的分数阶系统的混沌控制方法,在分数阶线性系统平衡点渐近稳定性理论的基础上,通过反馈控制方法得到该分数阶系统混沌控制器的一个设计方案,并利用预估校正方法进行数值模拟,验证了方案的有效性． 相似文献
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Abstract Beginning teachers of mathematics are likely to have noted the development of powerful multiple representation software which offers children access to the many modalities through which mathematics is expressed. We argue that embedded, even hidden, within such software are many mathematics conventions, which the naive learner has to unravel in order to construct meaning for those representations. We contrast such representations, which we label as instructive, with those children construct through the use of expressive software; this contrast is seen as analogous to aspects of literacy. We identify various characteristics of these two distinctive forms of representation. 相似文献