共查询到20条相似文献，搜索用时 140 毫秒
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朱孝春 《数学学习与研究(教研版)》2009,(1):115-115
三角变换是三角函数的核心,各种变换虽灵活多样,但贵在于“巧”.本文通过举例介绍其常用的四种变换（角的变换、函数名称的变换、函数式的变换、化归变换）的技巧. 相似文献
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函数y=Asin（ωx＋φ）的图象变换比较复杂,它包括相位变换、周期变换和振幅变换,其中相位变换是所有变换中的重点和难点,只有掌握好相位变换知识才能正确地解决其他变换问题,本文意在对学习者如何学好这一知识而提出自己的一点见解． 相似文献
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周焕芹 《渭南师范学院学报》1999,(2)
恒等变换法、分割变换法、映射变换法、幂级数变换法、傅里叶变换法、参数变换法、离散—连续变换法等是解决数学分析问题的重要方法,掌握和熟练运用这些方法对数学分析教学有重要意义 相似文献
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光学信息处理中常用的方法有傅里叶变换、分数傅里叶变换及小波变换,三种变换各有其特征和适用的范围.从变换的特征子空间出发,用每种变换的特征值和特征函数,分析了三种光学变换的特征,揭示三种变换的本质区别,阐明了各自的适用范围及优缺点.用三种变换对含噪信号进行了去噪实验,实验结果验证了三种变换的特征. 相似文献
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狭义相对论速度与加速度变换 总被引：1，自引：0，他引：1
文军 《渭南师范学院学报》2009,24(5):17-20
文中给出了相对论速度变换与四维速度变换、加速度变换与四维加速度变换的联系. 相似文献
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唐国增 《河北师范大学学报(哲学社会科学版)》2012,(2):5-10
物质变换是人类的生存条件。物质变换形态包括物质变换的一般形态、物质变换的特殊形态和物质变换的个别形态。物质变换形态越向后发展,经济的开放程度就越高,生产力发展的可能性就越大。物质变换的特殊形态优于一般形态。物质变换的个别形态优于特殊形态。在我国,社会主义商品经济作为物质变换的个别形态,优于资本主义商品经济。所以,我们应该毫不动摇地发展公有经济,引导资本主义经济健康发展。 相似文献
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本文提出了一种改进型的基于(9/7)提升小波的二维离散小波变换(DWT)实现方法。该方法对列变换的次序加以调整,按照行方向进行变换,从而使行列变换结合起来。利用该方法所得的结构使列变换和行变换并行处理,加快了变换速度,大大提高了小波变换的效率。二维离散小波变换的结构已经通过Verilog HDL行为级仿真验证。 相似文献
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张隆 《中国科教创新导刊》2008,(4):97-97
围绕高职高专积分变换的基本内容,通过Matlab在积分变换中的应用举例,论述了傅里叶变换,扭普拉斯变换和Z变换在Matlab实现方法。 相似文献
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周立群 《齐齐哈尔师范高等专科学校学报》2000,19(3):21-24
本将高等代数的中的“矩阵的转置”定义为“矩阵的主转置”,由此给出矩阵的次转置、行转置、列转置的定义,得出相关结论,并予以严格证明,这对矩阵的深入研究有着极其重要的意义。 相似文献
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竺洪波 《南京师范大学文学院学报》2005,(1):150-156
通过考察中国戏曲与小说的发展轨迹，结合两的整体关系，指出《西游记》杂剧记叙唐僧取经内容完整，结构宏大，由此演进为小说具有必然性，并进而对它在后世百回本小说《西游记》成书过程中的影响和作用作了具体、客观的评析。 相似文献
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School disciplines,social representations,and the construction of the didactics of history,geography, and civics 总被引：1，自引：0，他引：1
The author presents a concept of the didactics of history, geography, and civics that seeks to link, through a single dynamic, the civic, political, and social goals of school knowledge with everyday classroom practice and pupils' learning. Two concepts occupy the heart of this construction: those of school disciplines and social representations. The concept of school disciplines addresses the fact that school knowledge is a creation of the school, designed to enable it to achieve the social goals it is assigned. A school discipline is thus a particular combination of goals, content (in the form of shared knowledge), methods, and practices. The concept of social representations is a tool serving to analyze knowledge as theories of the natural and social world, its production, and its reception by the different actors involved. 相似文献
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James L. Tramill Janis K. Tramill Roscoe Thornthwaite Frances Anderson 《Psychology in the schools》1981,18(2):149-153
Research involving standardized reading achievement tests has been widespread, but there has been little investigation into the relationships among the more widely used tests of reading achievement. In the present study, the Reading subtest of the WRAT, the Reading Comprehension subtest of the PIAT, and the SORT were compared with each other and with the WISC-R. Results showed a high correlation between the WRAT and the PIAT, a moderately high correlation between the SORT and the PIAT, and a very low correlation between the SORT and the WRAT. The WRAT and the PIAT had higher correlations with the various components of the WISC-R than did the SORT. These findings imply that the WRAT and the PIAT measure essentially the same dimension of reading achievement, possibly verbal fluency, but that the SORT is measuring a different dimension, one that is also tapped to some extent by the PIAT. 相似文献
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Karen L. Jones Peter Tymms David Kemethofer Joe O’Hara Gerry McNamara Stephan Huber 《牛津教育评论》2017,43(6):805-822
It has been widely documented that accountability systems, including school inspections, bring with them unintended side effects. These unintended effects are often negative and have the potential to undo the intended positive effects. However the empirical evidence is limited. Through a European comparative study we have had the rare opportunity to collect empirical evidence and study the effects (both intended and unintended) of school inspections (a key system of accountability) in a systematic way, across seven countries. We present the findings of the unintended effects in this paper. Survey self-report responses from school principals in each country, with differing school inspection systems, are analysed to measure the prevalence of these unintended effects and to investigate the part played by pressure to do well in inspections. A key finding is that increasing pressure in school inspection systems is associated with the undesired effect of the narrowing and refocusing of the curriculum and instructional strategies. We also show that a proportion of school principals admit to misrepresenting the school in data sent to the inspectorate and show evidence for formalisation/proceduralisation (excessive focus on records) and ossification (fear of experimentation in teaching), although these factors are less related to changes in pressure. 相似文献
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Maren Elfert 《European Journal of Education》2015,50(1):88-100
Two education reports commissioned by the United Nations Educational, Scientific and Cultural Organization (UNESCO), Learning to be, otherwise known as the Faure report (1972) and Learning: The treasure within, otherwise known as the Delors report (1996), have been associated with the establishment of lifelong learning as a global educational paradigm. In this article, which draws on archival research and interviews, I will explore how these two reports have contributed to debates on the purpose of education and learning. In the first half, I will shed light on their origins, the context in which they came about, how they have been received by the education community and by UNESCO member states and how they have been discussed in the scholarly literature. In the second half, I will discuss the key themes of the reports, in particular lifelong learning as the global educational ‘master concept’. In the last section, I will reflect on how the Faure report and the Delors report are still relevant for our debates about learning today. I will argue that the concept of lifelong learning, as put forward by these reports, was a political utopia which is at odds with today's utilitarian view of education. 相似文献
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借助功能语言学主位和主位推进模式有关理论来分析语篇的衔接、信息分布、连贯、语篇发展以及译者如何利用这些分析结果充分解读翻译源文,在以语篇为翻译单位时,采取何种相应的翻译对策,生成在功能和效果上与之相当的目的语语篇。 相似文献
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Jamel K. Donnor 《Peabody Journal of Education》2018,93(1):23-37
In this paper, I examine the use of litigation as a strategic tool of resistance for thwarting school desegregation. Utilizing Cowan v. Bolivar County Board of Education as a case study, I argue that, despite losing the constitutional right to racially segregate public schools according to an explicit white supremacist doctrine, whites in Bolivar County, Mississippi, were successful in stemming the impending tide of social change associated with school desegregation through litigation. Litigious resistance not only provided southern whites with a racially moderate epistemology for undermining school desegregation regionally, but their legal challenges to school desegregation also laid the groundwork for non-southern white animus toward all federal education policies that promoted racial inclusion. 相似文献
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Becky Francis Louise Archer Julie Moote Jen de Witt Lucy Yeomans 《British Journal of Sociology of Education》2017,38(8):1097-1110
Hyper-femininity and the construction of the ‘girly girl’ label have been documented widely, but there has been less attention to their content (or any distinctions between these constructs). Indeed, it can be argued that the content of femininity remains a controversial and somewhat under-researched topic in feminist scholarship. This is also the case in relation to science, which has been widely characterised as a masculine terrain, but there has been less attention to why femininity is excluded from/by science. This article attempts to unpick some of these issues, with a particular focus on the construct of the ‘girly girl’, in relation to access to science. Drawing on qualitative data from the Economic and Social Research Council-funded ASPIRES 2 project, we analyse the discourses used by young people and parents in discussion of ‘girly girls’ and physics. We show the misogynist and excluding discourses projected onto the ‘girly girl’, and indeed that are used to interpolate femininity more broadly. We found that in discussions of science and (hyper-)femininity, even potentially positive feminine attributes were denigrated. Hyper-femininity was produced as ‘more than lack’: vacuous, but also a risible presence. In reflecting on our findings we consider whether femininity may be more derided in some discursive contexts (e.g. science discourse) than others, and whether femininity can or should be conceived as more than lack. 相似文献
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ELIYAHU ROSENOW 《Journal of Philosophy of Education》1993,27(2):209-220
ABSTRACT An examination of contemporary publications in the philosophy of education reveals that the authority of the teacher is being eroded. As teachers derive their authority from the democratic state and its compulsory education laws, the undermining of their authority indicates the undermining of the authority of the democratic state and its laws. A comparison between Plato and Dewey from this point of view reveals that this state of affairs is the upshot of the collision between the principle of authority and the principle of liberty, and that this collision constitutes the basic problem of democracy as well as of education for democracy. The challenge to contemporary education is consequently that of exploring ways leading to the rehabilitation of the authority of the teacher. 相似文献