椭圆形建筑场馆放样方法探讨

分析了椭圆形建筑场馆施工点位坐标获取方法,进而阐述了智能全站仪坐标放样法在场馆中的实施方法。     

关于儿童欺负行为研究的思考

儿童欺负行为主要发生在校园或者以校园为媒介的社交群体内,是一种常见的校园不良行为,并有可能发展为校园暴力。对欺负行为及其动机进行分析,培养儿童健康人格,采取科学教养方式,加强正面教育是对欺负行为进行有效干预的重要途径。     

语言的嬗变及语用特点

世界各民族语言,作为文化传播的重要载体,随着社会民族历史的变迁和政治、经济、文化的发展,也在不断地发展变化且历经了复杂、漫长的演变过程.     

Mathematical Modeling in the Primary School: Children's Construction of a Consumer Guide

This paper examines 6th grade children's local conceptual development and mathematization processes as they worked a comprehensive mathematical modeling problem (creating a consumer guide for deciding the best snack chip) over several class periods. The children and their teachers were participating in a 3-year longitudinal teaching experiment in which sequences of mathematical modeling problems were implemented from the 5th grade (10 years of age) though to the 7th grade. In contrast to traditional problem solving, mathematical modeling requires children to generate and develop their own mathematical ideas and processes, and to form systems of relationships that are generalizable and reusable. Reported here is a detailed analysis of the iterative cycles of development of one group of children as they worked the problem, followed by a summary of the mathematization processes displayed by all groups. Children's critical reflections on their models are also reported. The results show how children can independently develop constructs and processes through meaningful problem solving. Children's development included creating systems for operationally defining constructs; selecting, categorizing, and ranking factors; quantifying quantitative and qualitative data; and transforming quantities.     

布什政府的“民主改造”战略探析

“9.11”事件之后,美国加大了向第三世界国家推行民主自由价值的力度。布什政府借“反恐”之机,向第三世界国家特别是所谓的“流氓国家”与“失败国家”实施“民主改造”战略,不但采取政治、经济、军事等各种手段对这些国家进行“政权变更”,而且企图主导它们的“国家建设”进程。布什政府的“民主改造”战略本质上是为美国霸权服务的,必将遭到第三世界国家的强烈抵制,最终难逃失败的命运。     

试论南北朝小诗

南北朝文人创作的五、七言四句小诗渊源流长 ,作家众多 ,内容广泛 ,表现手法多样 ,取得了较高的艺术成就。本文着重探讨了小诗的形成、发展以及小诗的创作队伍、题材内容和艺术特色等。南北朝小诗的不断完善、成熟 ,为唐绝句做了必要的准备     

水杨酸铁的流变相合成和红外光谱

用流变相反应法合成了水杨酸铁配合物，对样品在4000—400cm^-1。范围内的主要红外光谱吸收峰进行了归属，通过元素分析、TG和IR确定该配合物的组成为Fe(HSal)3．3H2O(HSal=O-OHC6H4CO2)。     

Modeling water and carbon fluxes above summer maize field in North China Plain with back-propagation neural networks

INTRODUCTION Dynamics of carbon and water vapor fluxesexchange between the atmosphere and the ecosystembiosphere, depend on complex and non-liner interplayamong physiological, ecological, biochemical andedaphic factors and meteorological conditions (Jarvis,1995; Leuning et al., 1995). There are many studiesquantifying the fluxes across different time and spacescales as well as assessing the environment con-straints on them by some kinds of biophysical orempirical models whose resul…     

γ-Fe203和Fe纳米微粒的制备及相组成

用共沉淀法制备γ-Fe203和Fe纳米微粒，用X-射线衍射和TEM研究其相结构和形貌，并对影响相组成的因素进行了分析。     

大体积混凝土污水处理工程的施工技术

为防止大体积砼产生裂缝，采用HE微膨胀剂与LNF泵送剂行之有效。同时应进行温度应力与浇筑长度验算和精心施工。