mathematical model of map

Basic tactics play an important role in mathematics concept learning,including establishing concept group,constructing mathematics diagram,adopting objective figures reasonably and expressing concepts by words,etc.

其中,基础性策略在数学概念学习中具有重要作用,包括建立概念域或概念系、构建数学图式、恰当运用直观图形、用语言表述概念等策略。

In the light of essential consideration on the forming and developing essence of stony desertification, aiming at its prevention, a basic geoscience model for the r.

本文在分析石漠化形成和发展实质的基础上从预防的角度提出了石漠化整治的地学基本模式,阐述了地学模式建立的基本思想、模式基本特征及内涵、模式实施的途径。

The author carries out investigation and evaluation of environmental geology in this region,and discusses geoscience model,evolution tendency and control measures of formulation of flood disasters.

长江中游干流沿岸及江汉湖群、洞庭湖、鄱阳湖、巢湖地区,面积约21×104km2,是长江流域洪灾最为严重的地区,其形成与地质环境和地质作用有密切关系,但过去对这方面还缺少全面研究,开展该地区环境地质调查评价,探讨洪灾形成的地学模式、演化趋势与防治对策,避免发生区域性重大洪灾是防洪和环境灾害地质科学技术研究领域的一项重大课题。

In this paper, by discussing in detail the relation among learning time, reviewing time, learning and mastering Chinese, the author suggests two basic mathematical models, equidifferent model and equiratio model, which relate to the Chinese learning and reviewing.

本文较为详细地讨论了汉语学习、复习时间、学习量与掌握汉语的关系 ,提出了两个与汉语学习和复习有关的基本数学模式 :等差模式和等比模式 ;还研究了词汇量与学习时间的关系。