基于无限微元的地表面积求解

在信息化条件下,精确打击在作战中具有实际重大的意义。掌握敌方作战的一些具体信息如作战区域地貌信息等能为作战带来巨大便利。文章通过运用无限细分、近似计算的方法将不规则的地表面积的计算简化为三角形的面积计算这一简单过程。具体模型中首先运用数学软件matlab等将目标地形三维图中海拔高于12m的地表取出待用。此外,运用了海伦公式等数学方法来最终达到计算目标地表面积的目的。     

两步法制备仿生超疏水表面的实验设计

受自然界荷叶等表面超疏水现象的启发,结合科研成果,基于固-液界面润湿性相关的理论知识,将超疏水铜网表面的结构设计、制备及其在油水分离中应用研究引入到实验教学中。利用电化学沉积和化学还原两步法在铜网表面构建粗糙的微纳米结构,再将表面以正十二硫醇修饰,制备具有超疏水特性的铜网,将其应用于油水分离。另外,在实验课程中设置结果的分析讨论环节,巩固和验证理论知识点的同时加强学生对实验细节的观察能力。将科研成果回馈教学,这对于丰富教学实验项目、培养学生创新思维、提高学生学习效率、培养复合型人才具有重要的意义。     

Subdivision surface modeling system based on arbitrary topological curves network and combined subdivision

Arbitrary topological curve network has no restriction in topology structure, so it has more powerful representing ability in defining complex surfaces. A complex surface modeling system is presented based on arbitrary topological curve network and the improved combined subdivision method, its functions including creating and editing curve network, and generating and modifying curve network’s interpolated surface. This modeling system can be used to the process of products’ concept design, and its applications is also significant to the development of subdivision method.     

英语形容词的句法功能及认知分类

从英语形容词的句法功能角度出发,发现英语形容词可以作表语、定语、宾语补足语和主语补足语、状语以及用作独立成分.同时,根据认知语言学对英语形容词进行分类.     

Mercator and his map

In this article we present briefly some preliminary ideas of map projection, followed by a detailed account of the Mercator projection.     

直接计算法计算粗糙面薄膜的折射率和厚度

简述了椭偏法测量非粗糙面薄膜的折射率和厚度的基本原理，推导出粗糙面薄膜的漫反射椭偏方程，给出了C语言计算程序的流程图，并对实例进行计算。     

Taking Paint Samples for Pigment Analysis in Nineteenth-Century England

ABSTRACT

During the nineteenth century, chemists became increasingly engaged in the conservation treatment of polychrome surfaces. While collaborations between chemists and museum workers in charge of easel painting collections were mostly oriented towards the improvement of conservation practices, the involvement of chemists in the nascent field of archaeology was oriented towards material characterization, such as pigment analysis of polychrome surfaces. Since this type of analysis is destructive and damages the artwork, it could, therefore, be assumed that chemists were in these cases less concerned with the conservation of objects with an archaeological and historical provenance. On the contrary, my new reading of nineteenth-century English primary sources reporting pigment analysis shows that chemists also had ethical concerns about the physical integrity of archaeological objects and their conservation. This is apparent in the process in which paint samples were taken from the artworks for their subsequent analysis.     

基于MasterCAM的数控铣削加工刀具路径优化

通过作图比较,研究了不同尺寸刀具的切削粗糙度要求对刀具轨迹的影响,又进一步通过对曲面特征细分进行研究,并举例说明了如何利用MasterCAM的虚拟仿真技术和自动编程技术,以实现数控铣削加工刀具路径优化。     

Computing B Spline Surfaces on Transputer Networks

本文提出了在Ｔｒａｎｓｐｕｔｅｒ网络上计算均匀双３次Ｂ样条曲面的一种并行实现．这个工作对构造基于Ｔｒａｎｓｐｕｔｅｒ上的ＣＡＤ和图形系统是有效的     

利用MATLAB表现空间曲面的交线

研究MATLAB软件表现空间曲面交线的原理和方法,给出绘制空间曲面交线及其投影的一般步骤和实例。