返回料

After analysing the model and researching actual exercise , the thesis makes programming motion of the grab bucket.

论文通过对模型的进一步分析，在对卸船机实际作业研究的基础上，将抓斗运行依次规划为：垂直提升、平移上升复合运动、卸料平移返回、平移降落复合运动和加速垂直降落五个阶段。

When switching on the machine, the material is conveyed into the grading unit by the feeding devices. The material is separated into fine particle and coarse particle here, the qualified fine particle is released directly from the air pipe; the coarse particle enters the grinding chamber, grinded under high speed strike of the hitting block and then is transferred by the air pipe to the worm grading device. The satisfied particle is released with the exhaust air from the exhaust pipe and is collected as final product.

粉碎时，待粉碎物料由送料装置均匀送到分级室，在这里进行预先分级，原料中的合格颗粒经分级后从排气管排出，粗颗粒进入粉碎室，在冲击锤块的高速冲击和研磨作用下被粉碎，粉碎后的物料经进气管进入的上升气流作用下输送到蜗轮分级机进行先分级，合格颗粒经分级后从排气管随尾气一起排出后收集为产品，粗颗粒再次返回粉碎室继续粉碎。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。