基于模糊正交试验的纤维混凝土纤维参数优选

该文以钢纤维体积率、长径比、外形和聚丙烯纤维体积率为因子,安排正交试验研究了混杂纤维各因素对高性能混凝土抗压强度和劈裂抗拉强度的影响,并利用模糊数学理论对正交试验结果进行了分析,得到了混杂纤维混凝土的较优配比。结果表明:纤维各物理参数对纤维高性能混凝土综合性能的影响程度从大到小依次为:钢纤维外形、聚丙烯体积率、钢纤维体积率、钢纤维长径比;基准混凝土中加入长径比为70、体积率为1.5%的端钩形钢纤维和体积率为0.055%的聚丙烯纤维混杂时,对高性能混凝土增强和增韧效果最优。

分散染料涤纶染色工艺的模糊正交优化

针对以醋酸-醋酸钠为pH缓冲体系的分散染料涤纶高温染色工艺,运用模糊正交试验方法研究了高温匀染剂HR-214用量、高温保温时间、醋酸用量和醋酸钠用量对上色率和固色率的影响,并确定了最佳的工艺组合。结果表明,对上色率和固色率的综合影响次序为高温匀染剂HR-214用量>醋酸钠用量>醋酸用量>高温保温时间;最佳的工艺组合为高温匀染剂HR-214用量0.25 g/L,高温保温时间50 min,醋酸用量0.75 g/L,醋酸钠用量0.75 g/L;在醋酸钠辅助醋酸调节染液pH值时,可以达到涤纶织物分散染料130℃高温染色对染液pH环境的要求。

Fuzzy Analysis Method for Orthogonal Test on Seed Propagation of Eurya chinensis

Fuzzy analysis method for orthogonal test was used to study the effect of different sowing depth, seed soaking time, illumination intensity and culture soil on the seed germination rate of Eurya chinensis. The results showed that the effect of seed soaking time on the sowing and seedling of Eurya chinensis was the biggest, and the ethers were illumination intensity, sowing depth and culture soil. The germi- nation rate was the highest when composite soil was used as culture soil and seeds were soaked for 48 h and sowed in topsoil, and a layer of sunshade net was used.