It was analyzed that the finite element-cellular automaton （CAFE） method was used to simulate 3D-microstructures in solidification processes. Based on this method, the 3D-microstructure of 9SMn28 free-cutting steel ...It was analyzed that the finite element-cellular automaton （CAFE） method was used to simulate 3D-microstructures in solidification processes. Based on this method, the 3D-microstructure of 9SMn28 free-cutting steel was simulated in solidification processes and the simulation results are consistent with the experimental ones. In addition, the effects of Gaussian distribution parameters were also studied. The simulation results show that the higher the mean undercooling, the larger the columnar dendrite zones, and the larger the maximum nucleation density, the smaller the size of grains. The larger the standard deviation, the less the number of minimum grains is. However, the uniformity degree decreases first, and then increases gradually.展开更多
[目的]3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺是具有广谱抑菌活性的化合物,将其研制成优良环保剂型悬浮剂,可为实现田间应用提供技术依据。[方法]采用湿法研磨制备了12种不同配方的悬浮剂,通过质量指标检测确定最佳配方,测定其表...[目的]3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺是具有广谱抑菌活性的化合物,将其研制成优良环保剂型悬浮剂,可为实现田间应用提供技术依据。[方法]采用湿法研磨制备了12种不同配方的悬浮剂,通过质量指标检测确定最佳配方,测定其表面张力及其在黄瓜叶面的动态接触角,并开展了防治黄瓜白粉病田间药效试验。[结果]最佳配方为3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺40%(折百)、S043%、D4252%、W071%、乙二醇3%、硅酸镁铝0.4%、黄原胶0.12%、B150.12%、消泡剂X600.3%、水补足。此悬浮剂在有效成分0.27 g a.i./L时的表面张力以及在黄瓜叶面的动态接触角均小于对照药剂40%苯醚甲环唑SC,表明其具有良好的润湿性能。在有效成分0.27 g a.i./L下的防效为88.38%,与对照药剂25%嘧菌酯SC 0.20 g a.i./L相当,且对黄瓜安全。[结论]制备悬浮剂为类白色均匀悬浮液,流动性好,粒径合格,悬浮率稳定在98.5%左右,pH为4.09,黏度为452 mPa·s,入水分散性合格,热储、低温及冻融稳定性良好,未出现沉淀,各项指标均达标,对黄瓜白粉病防效优良,具有良好的开发应用前景。展开更多
基金supported by the National Natural Science Foundation of China (No.50874007, 50774109)
文摘It was analyzed that the finite element-cellular automaton （CAFE） method was used to simulate 3D-microstructures in solidification processes. Based on this method, the 3D-microstructure of 9SMn28 free-cutting steel was simulated in solidification processes and the simulation results are consistent with the experimental ones. In addition, the effects of Gaussian distribution parameters were also studied. The simulation results show that the higher the mean undercooling, the larger the columnar dendrite zones, and the larger the maximum nucleation density, the smaller the size of grains. The larger the standard deviation, the less the number of minimum grains is. However, the uniformity degree decreases first, and then increases gradually.
文摘[目的]3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺是具有广谱抑菌活性的化合物,将其研制成优良环保剂型悬浮剂,可为实现田间应用提供技术依据。[方法]采用湿法研磨制备了12种不同配方的悬浮剂,通过质量指标检测确定最佳配方,测定其表面张力及其在黄瓜叶面的动态接触角,并开展了防治黄瓜白粉病田间药效试验。[结果]最佳配方为3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺40%(折百)、S043%、D4252%、W071%、乙二醇3%、硅酸镁铝0.4%、黄原胶0.12%、B150.12%、消泡剂X600.3%、水补足。此悬浮剂在有效成分0.27 g a.i./L时的表面张力以及在黄瓜叶面的动态接触角均小于对照药剂40%苯醚甲环唑SC,表明其具有良好的润湿性能。在有效成分0.27 g a.i./L下的防效为88.38%,与对照药剂25%嘧菌酯SC 0.20 g a.i./L相当,且对黄瓜安全。[结论]制备悬浮剂为类白色均匀悬浮液,流动性好,粒径合格,悬浮率稳定在98.5%左右,pH为4.09,黏度为452 mPa·s,入水分散性合格,热储、低温及冻融稳定性良好,未出现沉淀,各项指标均达标,对黄瓜白粉病防效优良,具有良好的开发应用前景。
基金国家自然科学基金联合基金项目(U21A20485)浙江省高等教育“十四五”本科教育教学改革项目(jg20220019)+3 种基金浙江省产学合作协同育人项目(202018)浙江大学2023年度本科教学创新实践项目重点项目(202309)浙江省基础公益研究计划项目(LGG22F030008)浙江大学第一批AI For Education系列实证教学研究项目(202402)。
