共查询到20条相似文献，搜索用时 78 毫秒
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文章研究偶数周期下完备高斯整数序列的构造方法.利用整数集上多电平完备序列及相关函数的有关定义,对多电平完备序列周期为偶数时进行分析,所得到的完备高斯整数序列的周期等同于多电平完备序列. 相似文献
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初学有理数,由于引入了负数这一新概念,许多同学在处理一些概念性的问题时会产生模糊与错误.如:学生:0是最小的整数吗?老师:不是,在有理数范围内,整数包括正整数、负整数和0,0不是最小的整数,有理数中既没有最大的整数,也没有最小的整数. 相似文献
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三、质数、合数与整数的质因数分解一个大于1的整数除1和本身以外没有其他约数,这个整数称为质数(或素数).2是唯一的偶质数;除1和本身以外还有其他约数,这个整数称为合数.1既不是质数,也不是合数. 相似文献
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一、我想上节怎样的课?"整数除以分数"是学生在学习了"分数除以整数"之后的教学内容。根据学习经验,学生会类推出整数除以分数,就等于整数乘分数的倒数。课前的学情调查也证实了这一点,所以,对学生而言,在教师的引导下,发现整数除以分数的计算方法并不是难事。那么,既然算法不是问题,教学重点又应该落在何处呢? 相似文献
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1．0是最小的整数．辨析：错误．在有理数范围内,整数包括正整数、0、负整数,所以0不是最小的整数．有理数中没有最小的整数．2．正数和负数统称为有理数．辨析：错误。因为有理数还包括0．3．没有最大的负整数． 相似文献
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文章通过几个例题 ,介绍了一些适合中学生练习的 ,要求证明某些数一定是整数的平方或一定不是整数的平方问题的常用解法 相似文献
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The present study examines implicit sequence learning in adult dyslexics with a focus on comparing sequence transitions with different statistical complexities. Learning of a 12-item deterministic sequence was assessed in 12 dyslexic and 12 non-dyslexic university students. Both groups showed equivalent standard reaction time increments when the sequence was unexpectedly changed, suggesting that learning of the sequence took place. However, a novel analysis comparing transitions of differing complexity within the learning blocks indicated that dyslexic participants were impaired only for higher-order but not first-order sequence learning. No difference was found in the explicit awareness contribution between the two groups and this was found not to correlate with reaction time performance. This result suggests that statistical complexity of the sequence may account for intact and impaired learning performance in dyslexia. 相似文献
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吴集林 《赣南师范学院学报》2005,26(6):28-30
利用二叉树与栈序列的关系,给出了当入栈序列为{1,2,3,……n}时如何得到所有可能的出栈序列的方法,并用C++编程实现了这一算法.另外给出了判断一个序列不是入栈序列{1,2,3,……n}的出栈序列的结论,并用二叉树的方法给出了证明,通过实例验证了以上结论. 相似文献
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SHI Mei-hua 《浙江大学学报(A卷英文版)》2006,7(6):1077-1083
INTRODUCTION Almost split sequences, also called Auslander- Reiten sequences, were discovered by Auslander et al.(1995) for finitely generated modules over a finite- dimensional (artin) algebra and play an important role in other settings as well. While the proof of the exis-tence of almost split sequences for arbitrary artin algebras (see Section 1 of Chapter V in (Auslander et al., 1995)) is fairly constructive, it is sometimes pos-sible to give other ways of constructing almost spli… 相似文献
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Dyslexia is a specific learning disability characterized by difficulties with accurate and/or fluent word recognition and
by poor spelling abilities. The absence of other high level cognitive deficits in the dyslexic population has led some authors
to propose that non-strategical processes like implicit learning could be impaired in this population. Most studies have addressed
this issue by using sequence learning tasks, but so far the results have not been conclusive. We test this hypothesis by comparing
the performance of dyslexic children and good readers in both implicit and explicit versions of the sequence learning task,
as well as in another implicit learning task not involving sequential information. The results showed that dyslexic children
failed to learn the sequence when they were not informed about its presence (implicit condition). In contrast, they learned
without significant differences in relation to the good readers group when they were encouraged to discover the sequence and
to use it in order to improve their performance (explicit condition). Moreover, we observed that this implicit learning deficit
was not extended to other forms of non-sequential, implicit learning such as contextual cueing. In this case, both groups
showed similar implicit learning about the information provided by the visual context. These results help to clarify previous
contradictory data, and they are discussed in relation to how the implicit sequence learning deficit could contribute to the
understanding of dyslexia. 相似文献
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郝建丽 《商丘师范学院学报》2001,17(6):64-65,69
线性逆推数列an=pan-1 qan-2在数列部分占有重要的地位，而它的通项公式尚未求出。利用无穷级数，通过构造母函数，推出了数列{an}的通项公式，为数列通项公式的求法提供了新思路。 相似文献
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提出了一种基于混沌序列的数字水印嵌入和提取方法.因为混沌序列具有随机性,不容易被窃取,从而使得数字作品具有较强的抗攻击性,从而实现信息的隐藏. 相似文献
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Peter Riley Bahr 《Research in higher education》2013,54(2):171-200
Nationally, a majority of community college students require remedial assistance with mathematics, but comparatively few students who begin the remedial math sequence ultimately complete it and achieve college-level math competency. The academic outcomes of students who begin the sequence but do not complete it are disproportionately unfavorable: most students depart from the community college without a credential and without transferring to a four-year institution. Interestingly, however, many of these students continue to attend the community college after they exit the remedial math sequence, sometimes for an extended period. One is led to ask why students who do not complete the sequence generally are not finding their way to an alternative credential objective that does not require college-level math competency, such as a career and technical education certificate, sometimes referred to as a vocational certificate. In this study, I explore three possible answers to this question, including difficulty navigating to the alternative credential, declining participation in the community college, and declining academic performance. I find that all three of these explanations contribute (to varying degrees) to explaining the low rate of certificate completion among remedial math students who do not achieve college-level math competency. 相似文献
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杨智海 《中国教育发展研究杂志》2007,4(3):92-94
由数列的递推公式求通项公式的五种基本方法，不仅能深化数列的函数观点，更能体现数学的化归思想．只要在复习过程中把握好数列概念和转化思想，就能轻松地解决好这一题型。 相似文献
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张纪平 《泉州师范学院学报》2008,26(6):19-21
一致收敛的判别法对于函数列分析性质非常重要,Dini判别法是常见的判别方法,但它要求的条件相当强,不具普遍性．文章从点列角度出发给出函数列一致收敛的一个充要条件,并举例阐述其对判断是否一致收敛的有效性。 相似文献
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When rats receive a sequence of rewards of different magnitudes for traversing a runway, they learn to “track” the sequence, showing anticipation of the forthcoming reward by appropriate running speed. There is disagreement as to whether this behavior depends on rats’ encoding and recalling a complete sequence of foregoing hedonic events or just the immediately preceding one. The present experiments showed that rats can remember more hedonic events than the most recent one. In Experiment 1, when exposed concurrently to the sequences 10-1-0 (pellets) and 0-1-10, they were faster on Run 3 of the increasing than of the decreasing sequence, a discrimination which cannot be made on the basis of the preceding (1-pellet) reward alone. Experiment 2 showed that this behavior reflects genuine anticipation of the Run 3 reward, not simultaneous contrast or other simple aftereffects of Runs 1 and 2. It is argued, however, that these results, together with related findings by Capaldi and Verry (1981), show merely that rats can recall a hedonic event other than the most recent one, not that a sequence of such events is fully recalled in order. 相似文献