不同药剂拌种、拔节期叶面喷雾对小麦茎基腐病的田间药效试验

为了筛选出防治小麦茎基腐病效果良好的杀菌药,进行了不同药剂的拌种和叶面喷雾田间药效试验。试验结果表明:在单独拌种试验中,5种药剂均能促进小麦植株的生长发育,有效防治小麦茎基腐病,从而提高小麦的产量,其中以30 g/L苯醚甲环唑悬浮种衣剂的效果最好,27%苯醚·咯菌腈·噻虫嗪悬浮种衣剂的效果次之;在药剂拌种+拔节期叶面喷雾试验中,以30 g/L苯醚甲环唑悬浮种衣剂拌种+20%氰烯菌酯·己唑醇悬浮剂叶面喷雾处理对小麦茎基腐病的防治效果最好,且对小麦的增产效果最佳;30 g/L苯醚甲环唑悬浮种衣剂拌种+43%戊唑醇悬浮剂叶面喷雾处理的防治效果和增产效果均次之。

清代皇帝服饰制度及其艺术地位

传统观念中,服饰不仅是华夏礼仪的重要载体,更是礼制的重要表现。清代的皇帝服饰在中国服饰史中最繁缛复杂。以之为研究对象,在考古资料和文献资料的基础上,阐述清代皇帝服饰形式及其制度,不仅反映了当时经济的发展程度,更代表了一种新的服饰艺术。

浅谈儒家思想对朝鲜时代四大礼仪服饰的影响

分析儒家思想对朝鲜时代四种礼仪服饰的影响,可见朝鲜时代极其重视儒教,以儒家思想作为治国理念,具有等级森严的封建中央集权制国家特征,在生活中处处都渗透着儒家的礼教思想,从衣着服饰上可以鲜明地区别身份、地位与尊卑、贵贱。

大型对数凸形圆柱滚子磨削加工结果分析

为满足客户需求,开展了大型圆柱滚子对数凸度成形磨削加工试验,阐述了加工原理,确定了磨削加工工艺。根据圆柱滚子凸度轮廓的已知数据,结合Solidworks样条曲线拟合,得到砂轮工作面内凹曲线上相应点的修整量占比。采用直线插补原理控制金刚石笔修整轨迹,将砂轮工作面修整成内凹的对数曲线廓形,加工时将砂轮工作面形状复映到滚子素线上。试验结果表明:滚子检测技术指标均能满足产品要求,且轴向跳动和圆度误差远小于产品要求值,滚子凸度最大值为89.8μm,滚子两侧凸度偏差不超过1.5μm。

Development of Mathematical Model for Control Wear in Backup Roll for Hot Strip Mill

The precision of strip flatness depends on several factors; wear of rolls is one of the main variables that have influence on the surface quality of the strip. The wear of the roils represents a complex friction condition, sometimes the wear in the backup roll is not analyzed because the strip is not in contact with the backup roll; however, after several campaigns of rolling, the wear in the backup roll becomes dangerous because the pressure distribution is not uniform. Investigation of mechanism of the surface deterioration of the backup roll for the hot strip rolling is very important for the development of the automatic strip shape control system used in hot strip mills. A mathematical model is developed considering the Hertzian pressure distribution between two cylinders with parallel axes. It is used in real time for calculating the wear in the backup roll and in this manner take deci- sions for preventing finished product reworking or damage of equipments, which result in accidents caused by excessive wear in the backup rolls.