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英语己经被越来越多的学生和家长重视,随着改革开放和现代社会的迅猛发展,英语成为各级各类学校学生学习的一门重要学科。目前,全省都在倡导课堂高效率工程,为了使英语课堂教学更加有效,具体做到以下几点： 相似文献
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Probability density function (PDF) method is proposed for analysing the structure of the reconstructed attractor in computing the correlation dimensions of RR intervals of ten normal old men. PDF contains important information about the spatial distribution of the phase points in the reconstructed attractor. To the best of our knowledge, it is the first time that the PDF method is put forward for the analysis of the reconstructed attractor structure. Numerical simulations demonstrate that the cardiac systems of healthy old men are about 6 - 6.5 dimensional complex dynamical systems. It is found that PDF is not symmetrically distributed when time delay is small, while PDF satisfies Gaussian distribution when time delay is big enough. A cluster effect mechanism is presented to explain this phenomenon. By studying the shape of PDFs, that the roles played by time delay are more important than embedding dimension in the reconstruction is clearly indicated. Results have demonstrated that the PDF method represents a promising numerical approach for the observation of the reconstructed attractor structure and may provide more information and new diagnostic potential of the analyzed cardiac system. 相似文献
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<正>一、研究的缘起想象能力、联想能力在所有思维能力中占居着重要位置,而在数学学科知识和素养的启蒙培植过程中,空间想象力更有着其实际意义。所谓空间想象力,就是人们对客观事物的空间形式进行观察、分析和抽象思维的能力。这种数学能力的特点在于善于在头脑中构成研究对象的空间形状和简明的结构,并能将对实物所进行的一些操作,在头脑中进行相应的思考。然而,对于小学阶段的孩子而言,在头脑里几何图形的认识、空间概念的形 相似文献
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一、成本管理应重在讲求成本效益成本是商品经济的产物,是商品货币经济中的一个经济范畴。马克思、恩格斯曾科学地进行分析:“按照资本主义方式生产的每一个商品W的价值,用公式来表示是W=C+V+M。”如果我们从这个产品中减去剩余价值M,那么,在商品中剩下来的,只是一个在生产要素上耗费的资本价值C+V的等价物或补偿价值。但马克思、恩格斯是针对社会再生产而讲的,产品成本(即C+V)是企业维持简单再生产的补偿尺度,如产品的成本耗费不能得到补偿,简单再生产就无法进行。长期以来, 相似文献
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Probability density function (PDF) method is proposed for analysing the structure of the reconstructed attractor in computing the correlation dimensions of RR intervals of ten normal old men.PDF contains important information about the spatial distribution of the phase points in the reconstructed attractor.To the best of our knowledge, it is the first time that the PDF method is put forward for the analysis of the reconstructed attractor structure.Numerical simulations demonstrate that the cardiac systems of healthy old men are about 6-6.5 dimensional complex dynamical systems.It is found that PDF is not symmetrically distributed when time delay is small, while PDF satisfies Gaussian distribution when time delay is big enough.A cluster effect mechanism is presented to explain this phenomenon.By studying the shape of PDFs, that the roles played by time delay are more important than embedding dimension in the reconstruction is clearly indicated.Results have demonstrated that the PDF method represents a promising numerical approach for the observation of the reconstructed attractor structure and may provide more information and new diagnostic potential of the analyzed cardiac system. 相似文献
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陆宏伟 《中国科教创新导刊》2010,(35):204-204
随着学校现代化建设的推进,我们卢家巷实验学校的校园网建设也有了一定的规模,它促进了我们教育教学的改革,为教师的教育工作带来了极大的方便,但同时也为计算机教师带来很多的工作压力。本文在管理、硬件维护和软件维护等几个方面阐述了做为一名网管教师如何才能高效地管理好自己的校园网。 相似文献
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