几何绘图巧应用

小学三年级的数学作为小学数学学习的一个重要分水岭,对于数形结合思想的学习以及应用有了更高的要求。本文以实例讲解几何绘图在小学三年级数学的知识背景下,对于解决问题方面起到的重要作用。

建筑制图中平面几何图形绘制训练模块

建筑制图中几何绘图的训练案例，提高同学们的绘图能力。

AutoCAD在力学中的应用

以手工作图为主的图解法是一种求解力系问题的常用方法,介绍此方法在Auto-CAD环境之下,借助其强大的几何设计绘图功能,方便、精确地做出力的多边形,从而更好地满足工程实际要求。

A novel finite element model for single-layered wire strand

A new finite element model for single-layered strand was investigated for accurate and efficient mechanical behavior analysis.Mathematical model was created by sectional path-nodes sweeping and dynamic node-beam mapping.Geometric relations between nodes in center core wire and helical wires were deduced in tension and bending incorporating material elasticity theory and deformation geometrical compatibility.Based on Timoshenko beam theory,strand of a pitch length was modeled with specific material,geometric parameters and synthesized constraint equations defined in ANSYS software,and predetermined load cases were performed.The obtained results show that discrepancies between suggested method and Costello theory do not exceed 1.51% in tension and 6.21% in bending,which verifies the correctness and accuracy of the suggested finite element model in predicting mechanical behavior of single-layered wire strand.

两种基于空间相关性的遥感亚像元分类制图方法对比分析

为了对比基于Hopfield Neural Network(HNN)和几何绘图的遥感亚像元分类制图方法的具体性能,验证空间相关性原理用于遥感亚像元定位的可行性。以一个研究区的TM影像为对象,通过利用HNN和几何亚像元制图方法,获得该区的亚像元定位结果,对比分析了各方法的视觉效果、精度和时间复杂度。结果表明:空间相关性特性在两种方法中得到了良好的体现,为后续亚像元制图研究应用提供参考。