共查询到20条相似文献，搜索用时 156 毫秒
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洛必达法则（L”Hospitalrule），是利用导数计算待定型（或称未定型）的极限的一种常用的方法。不论是数学专业用的《数学分析》教科书，还是非数学专业用的《高等数学》教科书，都有一节专门介绍洛必达法则及其应用。有的教科书还特意介绍治必达法则的“优越性”和“有效性。”本人发现某些教科书或教学参考书在对洛必达法则的介绍中，有些提法与实例是值得商榷的。一、关于洛必达法则的“优越性”为了方便对问题的探讨，先将文献[1]第227页的有关内容抄录如下：解当x→a时，tgx-tga→0与x-a→0，根据洛必达法则，有将此题的计算方法与练… 相似文献
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刘小凤 《数学学习与研究(教研版)》2010,(11):51-51
本文巧妙运用习题,让学生在练习的过程中探索、领悟洛必达法则使用的普遍性、使用的局限性以及使用的技巧,以期达到熟练掌握使用洛必达法则的目标. 相似文献
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彭超于 《郧阳师范高等专科学校学报》1990,(1)
洛必达法则是求待定式(亦称未定式)“○/○”型与“∝/∝”型的极限的重要方法。为了“吃透”洛必达法则,能运用它顺利解决有关问题,今举出若干例子,提出几点值得注意之处。 相似文献
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极限思想贯穿于现行高中教材的各大版块,洛必达法则是数学中求函数极限的一个重要定理,特别是用洛必达法则求函数的极限也是高考中解决恒成立问题的一个有效途径. 相似文献
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Stephen Petrina 《Interchange》2004,35(1):81-126
What should be learned? How should it be organized for teaching? These seemingly simple questions are deceivingly political. Curriculum theorists are preoccupied with the politics of the first question at the expense of the realpolitik of the second. Instructional designers are preoccupied with the realpolitik of the second question at the expense of the politics of the first. I argue that conceptual distances between curriculum theory and instructional design are based on divisions of labour established during the 1960s. After decades of neglect, curriculum theorists, and specifically critical theorists, appear clueless when it comes to curriculum design and the realpolitik of their causes. When it comes to the realpolitik of practice their political causes are formless. Quite the opposite of critical theorists, instructional theorists nearly mastered the realpolitik of form but have no political causes. I argue that, to contradict the status quo of C&;I, curriculum theorists will have to dirty their hands with the realpolitik of form and instructional designers will have to clutter their heads with theory. 相似文献
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Clarence W. Joldersma 《Interchange》2008,39(1):21-47
This article explores the question: Why are students of worth? Educationally, an answer often involves a Kantian response:
They are of worth because they are always ends and never means. This response is usually connected to a notion of autonomy
interpreted as individual, rational self-determination. The article argues for a different answer. The essay begins with a
recent educational example of construing worth as rational autonomy. Meira Levinson, in her book The Demands of Liberal Education (1999), argues for a version of rational autonomy which is taken in the essay as a Kantian response to the question. The
essay then turns to Kant’s own understanding of intrinsic human worth as ends. Although the essay agrees in general with the
notion of end, it criticizes Kant’s version of rational autonomy. Instead, it argues for a notion of worth as irreplaceable
singularity. Both the critique of the Kantian answer and theessay’salternative are shaped by the philosophy of Emmanuel Levinas.
Here technical notions of “the other,” proximity and singularity are brought to bear on the question of human worth. The Levinasian
alternative, so the essay argues, better answers the question of student worth by highlighting the incomparability of the
student as a singular other. 相似文献
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建构主义学习理论与信息技术相结合对教学产生积极影响，本文就影响的五个方面进行讨论：1．教师角色转变。2．学生学习的变革。3．教学手段的变革。4．教学环境的变革。5．教学模式及方法的变革。 相似文献
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理本论是朱熹哲学思想的核心和最高范畴,也是朱熹整个学术思想的核心和理论基础。这是一个具有客观唯心主义性质和伦理本位色彩的哲学范畴。其本体论哲学的构建是通过对传统文化中儒、道、佛三家思想的全面吸收和改造而完成的。具体讲:吸收佛学本体论的思维模式并将之改造为道德本体论;吸收儒学的道德学说并将之改造为伦理本位的哲学:吸收道家的认识论思想并将之改造为伦理体验的认识论。 相似文献
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邹兴明 《临沂师范学院学报》2008,30(1):87-91
文明是劳动的积累和积累的劳动,是人类智慧和汗水的结晶,是人们开创新的历史的既得力量。人类社会的进步取决于人类文明的历史传承与创造,社会个体的价值寓于个体自身在历史发展过程中对人类文明的传承与创造。历史的实现方式在于人们对人类文明的历史传承与创造。英雄人物在历史中的作用取决于其是否融入创造历史的群众运动中去。人类文明的传承与创造是人类历史走向进步的重要基石,也是人类历史得以延续与发展的社会基因。人类文明的历史传承与创造积淀成历史的现实与现实的历史,人类历史的演进与人类文明的传承与创造齐头并进。 相似文献
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It is known by entropy theory that image is a source correlated with a certain characteristic of probability. The entropy rate of the source and ? entropy (rate-distortion function theory) are the information content to identify the characteristics of video images, and hence are essentially related with video image compression. They are fundamental theories of great significance to image compression, though impossible to be directly turned into a compression method. Based on the entropy theory and the image compression theory, by the application of the rate-distortion feature mathematical model and Lagrange multipliers to some theoretical problems in the H.264 standard, this paper presents a new the algorithm model of coding rate-distortion. This model is introduced into complete test on the capability of the test model of JM61e (JUT Test Model). The result shows that the speed of coding increases without significant reduction of the rate-distortion performance of the coder. 相似文献
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国外死亡态度量表发展述评 总被引：2，自引：0，他引：2
国外从上个世纪五六十年代即展开对死亡态度的研究，至今已经发展的相当成熟。在发展过程中，死亡态度量表起着重要的作用，它在初期推动了死亡态度的研究，随着死亡态度研究的不断深入，研究成果应用于死亡态度量表，促使其不断发展，二者之间形成了一种相辅相成的关系。回顾死亡态度的发展其实就是回顾国外死亡态度研究的历程，希望通过回顾这一过程，对国内死亡态度研究的开展有借鉴作用。 相似文献
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严春友 《山西大学师范学院学报》2011,(1):1-4
劳动以对象意识和主体意识的诞生为前提,以内在的精神活动即思想为前提,劳动是外在化和客观化了的思想。思想本身就是劳动,是决定其他劳动的劳动,人是一种思想着的动物。哲学是思想的最高的、最彻底的和最纯粹的形态,思想规定了人的特殊存在方式,而哲学则规定了思想的存在方式。哲学活动的目标是要超越一切确定性、有限性而走向终极,追溯终极原因和认定终极意义,这决定了劳动的范围和劳动的目的。哲学还要反思自身和自我批判,其所具有的内在否定性,人因而能够突破种种限制而超越既定世界,不断创造出崭新的未来和理想天地。哲学是对世界和人生的最高＂解释＂,这种解释塑造了改造世界的主体——人,奠定了人的内在世界,人内在的观念内涵决定了人外在地对世界的改造。文化世界是根据观念建立起来的,因观念的变化而提升和变化,哲学便是改变观念的活动,是改变个体心灵的活动,形成世界观、人生观。哲学的力量是本源性的力量,人的日常行为和日常所思由其所派生。人的力量和意志来自于内在的思想,来自于内在的哲学认识和哲学信仰。 相似文献
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论老子哲学的“无” 总被引：1，自引：0，他引：1
王晖 《徐州师范大学学报(哲学社会科学版)》2000,26(1):34-37
老子对其“道”有着一以贯之的思路,即道是对生命本真存在的体悟。“无”在老子道论中具有核心地位,“无”是道的超验性的指称。因此,道之“生”,并非宇宙论的化生,而是出于生命的体验,其本质就在于“无”之生,是“无”之心体对万物的当下成就。以“无”为本体的“无—有”一体化运作形成道的内在结构,“无”在“言”出“有”中踏入了超验性与经验性的两难境地,而“有”对“无”的当下回归使物我保其真性。在这个结构中,“真”是“无”的内涵,“虚”与“静”构成了“无”的动力机制。 相似文献
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Yaroslav Senyshyn 《Interchange》1998,29(4):425-437
Students have to be punished if they have made a serious transgression. Avoidance of punishment will lead to serious complications. But punishment is inseparably linked with guilt and forgiveness. The inability of individuals to forgive themselves was regarded by Kierkegaard to be an emanation of individual false pride, a kind of vanity. This type of despair, a psychological and spiritual disorder, is a serious and debilitating problem. The inability to escape this despair of forgiveness can lead to a loss of genuine humanness. Unchecked, this despair can lead to unrelatedness of self to itself and fear of the possibility of freedom. Thus the self-knowledge attainable in despair over the forgiveness of an offense would lead to what we would call a successful rehabilitation of the individual and his or her conjunct reintegration into society. Kierkegaard's ideas on punishment are interesting — historically and philosophically speaking — because they represent a softening of a harsh view of punishment by stressing the humanizing aspects of guilt and forgiveness. 相似文献