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从Riemann积分与Lebesgue积分的定义、性质、积分与极限交换次序及微积分基本定理等方面进行比较,并给出Lebesgue积分下的积分中值定理及证明,讨论了Lebesgue积分和Riemann积分二者之间的关系。最后,通过二者在广义积分方面的比较,说明Lebesgue积分在广义积分方面并不是Riemann积分的推广。 相似文献
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本文论述了三重积分计算中围成积分区域的曲面方程与积分限之间的关系。说明如何由曲面方程确定积分变量的积分限,改变累次积分的积分次序时,如何根据原积分限确定新的积分限。说明了在坐标变换下,如何由原曲面万程确定新积分变量的积分限。 相似文献
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丁介平 《安徽广播电视大学学报》2004,(3):124-125
本文通过对重积分计算的分析,认为可以不用交换积分的次序来计算,从而得到用分部积分法计算重积分的结论:∫Df(x,y)dxdy=x[x∫y2(x)y1(x)F(x,y)dy]ba-∫bax,[F(x,y2(x))y'2(x)-F(x,y'1(x))Y'1(x)]dx同时将结论予以推广,并通过具体例题说明其应用. 相似文献
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余元公式是数学分析中的一个重要公式,在积分学中有许多应用。通过交换二重积分次序和积分以及级数理论可以得到余元公式的证明。 相似文献
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Timothy C. Papadopoulos Athena Charalambous Androniki Kanari Maria Loizou 《European Journal of Psychology of Education - EJPE》2004,19(1):79-105
This study reports two different experiments, as a part of a longitudinal study, that evaluated a cognitive intervention (PREP:
PASS Reading Enhancement Program) to enhance early phonological processing skills, such as odd-word-out, segmenting, and blending,
to kindergarten children at-rish for reading difficulties, in order to support the development of subsequent word reading
skills. As part of the first experiment, thirty children aged 5.1, matched on the basis of age, gender, parental education
levels, Non-verbal and Verbal IQ, were assigned to an experimental and a control group (15 in each group) and compared before
and after the four-week intervention on a set of phonological and cognitive (successive and simultaneous processing) measures.
The two groups of participants were screened to be significantly different at pre-test on the outcome measures. The results
of the first experiment indicated that the experimental group performed equally well with the control group on all the measures
of phonological and cognitive processing skills. Subsequent analysis focusing on aptitude-treatment interaction indicated
that the PREP program appeared to be optimally successful in improving phonological skills in cases where the cognitive profile
of the 5-year-olds matched the emphasis on successive information integration. The follow-up experiment examined the long-term
effects of PREP remediation. Results showed that both the experimental and control groups performed equally well on word reading
tasks and, more importantly, on the bridging PREP tasks, requiring knowledge of the alphabet and of letter-sound correspondences,
despite that neither of the groups had been previously trained on the latter. Discussion concludes that intervention including
inductive training on the distal cognitive processes, namely successive and simultaneous processing, appears to be effective
for enhancing early word-reading skills to kindergarten children at-risk for reading difficulties, even in the absence of
direct training of these skills in kindergarten. 相似文献
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顾玉林 《重庆第二师范学院学报》2007,20(2):115-118
我国高校的学科建设面临的突出问题是学科建设中的“结构优化”、“学术梯队的整合及其评价、管理体制”的问题。围绕优势学科群开放平台的构建,优化专业、课程,以及建设好与之相适应的师资队伍是解决这一问题的关键。 相似文献
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The research reported in this article was undertaken to obtain a better understanding of problem solving and scientific reasoning in 10-year-old children. The study involved measuring children's competence at syllogistic reasoning and in solving a series of problems requiring inductive reasoning. Children were also categorized on the basis of levels of simultaneous and successive synthesis. Simultaneous and successive synthesis represent two dimensions of information processing identified by Luria in a program of neuropsychological research. Simultaneous synthesis involves integration of information in a holistic or spatial fashion, whereas successive synthesis involves processing information sequentially with temporal links between stimuli. Analysis of the data generated in the study indicated that syllogistic reasoning and inductive reasoning were significantly correlated with both simultaneous and successive synthesis. However, the strongest correlation was found between simultaneous synthesis and inductive reasoning. These findings provide a basis for understanding the roles of spatial and verbal-logical ability as defined by Luria's neuropsychological theory in scientific problem solving. The results also highlight the need for teachers to provide experiences which are compatible with individual students' information processing styles. 相似文献
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Lagrange之辅助方程理论产生的原因 总被引：1，自引：1，他引：0
赵增逊 《咸阳师范学院学报》2011,26(2):85-88
辅助方程理论即求解三次方程时需预解一个二次的辅助方程,解四次方程时需预解一个三次的辅助方程,是Lagrange对于代数方程求解的贡献之一。该理论直接导致了La-grange置换思想的产生,为用置换思想进行代数方程求解奠定了基础。由此以后一大批代数学家致力于方程求解,并最终使代数方程求解得以完美终结,甚至导致了代数学的新生。剖析了Lagrange的辅助方程理论出现的原因,并阐述了该理论的影响。 相似文献
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Language Impairment in Less Skilled Comprehenders: The On-Line Processing of Anaphoric Pronouns in a Listening Situation 总被引：1，自引：0，他引：1
The purpose of this experiment, conducted with second-grade children (mean age: 7;8), was to examine the hypothesis that less
skilled comprehenders in a reading situation suffer an impairment in spoken language comprehension and, more specifically,
in the on-line processing of anaphoric pronouns. Skilled and less skilled comprehenders performed a cross-modal naming task
investigating the effects of pronoun gender and pragmatic inference from the verb on the integration of two successive sentences.
Results revealed different patterns of effects in the two groups. The skilled comprehenders integrated on-line sentences by
relying on pronoun gender and verb meaning. Pronoun gender appeared to exert a dominant influence relative to verb bias. In
the less skilled comprehenders, on-line integration was not systematic, being dependent on the meaning of the verb and the
proximity of the referent. Complementary analyses revealed similar patterns of effects among less skilled comprehenders, whether
they were good decoders or poor decoders. These results show that less skilled comprehenders are developmentally delayed compared
with their skilled peers, and extend the language impairment hypothesis to cover discourse-level processes. 相似文献
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随着高职教育的飞速发展和规模的不断扩大,越来越多的中职学生有机会接受高等教育。中高职衔接的形式主要有三种,即"5年一贯制"、"3+2"模式和"3+3"模式。为了使中职学生尽快适应高职教育教学模式,保证教学质量和高职人才培养目标的实现,应该做到人才培养方案一体化、课程体系一体化、教材和教学资源使用一体化。 相似文献
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孔鑫 《南昌教育学院学报》2011,26(5):62-63
从职业融入的角度看,法国高校的文凭建设主要涉及LMD学制、大学文凭与国家文凭两分法以及企业与大学共同创建文凭三个方面。而中国高等教育一直在经历学科改革,而后者也势必使得越来越多的文凭产生。为了促进毕业生的职业融入,法国高校、教育研究人士和企业方在文凭建设方面对我国在这个方面的研究有何借鉴意义：创建大学文凭、高校企业联合培养,文凭易读化。 相似文献
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WTO和EU分别是全球经济一体化和区域经济一体化发展的产物和典型代表。从这两个国际组织法律制度的分析可以更清楚地了解全球经济一体化和区域经济一体化之间的关系,从而可以促进国际经济一体化的这两种存在形式的协调与共同发展,实现国际贸易自由化的目标,并且也可以偃息法学界关于全球经济一体化与区域经济一体化相互关系的争论。 相似文献
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英语商务信函语言风格研究 总被引：1，自引：0，他引：1
程小蔷 《黄河科技大学学报》2010,12(3):119-122
随着全球经济贸易一体化进程的不断推进及我国对外商务活动的日益增多,英文商务信函成为一种重要的信息传递手段。商务写作力求言简意赅,简明扼要。英语商务信函的语言风格表现在语气、语态、词语三个方面。 相似文献