试件制作对不饱和聚酯树脂力学性能测试结果的影响

本文探讨了不饱和聚酯树脂的固化、制作模具和试件加工对其力学性能测试结果的影响,对客观地揭示不饱和聚酯树脂力学性能指标具有积极的指导意义。

UG／CAM软件在曲面等深沟槽加工中的应用

UG软件是当今世界上最先进和紧密集成的、面向制造行业的CAD／CAE／CAM高端软件。在曲面深沟槽试件加工中的应用UG／CAM软件。

G50T数控卧式镗铣床改造

近年来,机床自动化控制技术发展很快,早期一些进口机床机械精度和液压系统基本完好,但控制系统故障频繁,维修备件很难采购,采用新技术对老系统进行改造已是大势所趋,本文重点阐述了针对G50T数控卧式镗铣床进行改造的设计思路和方案。

Calculation of Percentage of Coarse Aggregate Present in Concrete Using Processing of Digital Images Obtained with a Commercial Scanner

This paper presents a method for determining the percentage of coarse aggregate in concrete specimens by image processing. The test pieces were produced with the aim of obtaining images of their cross sections through a scanner table. In order to increase the contrast between mortar and coarse aggregate the sliced surfaces were treated with the phenolphthale in solution. The images obtained in the scanner were processed in a program developed with MATLAB （matrix laboratory）. The average coarse aggregate in each section and the mean of coarse aggregate per test body were calculated. With the results, it was revealed that the method returned satisfying results when compared to the original trace of the concrete.

水泥混凝土道面强度评定探讨

本文根据某机场道面评定实践，分析了机场水泥混凝土道面设计控制指标，提出了正确的取样和加工试件方法，为正确评定机场道面强度提供科学的依据。