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systemically analyzed respectively, and the shape and fluctuation of plume of the keyhole were observed to reflect the stability of the keyhole. The results show that increasing laser power or decreasing laser spot size can lead to the rising of both number and occupied area of pores in the weld; meanwhile, the plume fluctuates violently over the keyhole, which is always companied with the intense......
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Trans. Nonferrous Met. Soc. China 23(2013) 3748-3757 Analysis of high-power disk laser welding stability based on classification of plume and spatter characteristics Xiang-dong GAO1, Qian WEN1, Seiji..., Osaka 567-0047, Japan Received 7 January 2013; accepted 20 March 2013 Abstract: Classification of plume and spatter images was studied to evaluate the welding stability. A high-speed camera was used......
低压铸造机控温系统的改进张大鹏戴卡轮毂制造有限公司 河北秦皇岛066003摘 要:通过对SR70A系列仪表及固态继电器的功能,特性介绍 ,揭示了SR70A系列PID调节仪及固态继电器的鲜明优点.将SR70A系列PID调节仪与固态继电器相接合 ,设计出一种实用的过零调功温控系统 ,用于PLUME低压铸造机 ,控温精度和速度显著提高 ,与温度有关的铸造缺陷明显减少关键词:低压铸造机;专家PID算法;通讯接口;自由输入;固态继电器;......
亨德森钼矿的盘区崩落开采法贾振海,周美令,周以英摘 要:<正> 亨德森钼矿(Henderson)位于美国科罗拉多州,里德山(Red Mountain)峰预之下3700~5400英尺,康替南特尔(Continental)分水岭的东端,克立尔·克立克(Crear Creek)山谷中.井架,机修厂,仓库,办公室等都布置在山谷中.里德山是由前寒武纪的Silver Plume花岗岩构成,第三纪流纹岩斑岩株杂岩侵入里德山关键词:......
smoke from rolling back, then the smaller wind speed can cause smoke to roll back easily. Hot plume will lead to secondary disasters in upwind side. Because of roadway wall, hot plume released from roadway fire zone has caused the occurrence of the ceiling jet, and the hot plume has been forced down. Whereas, owing to the higher temperature, buoyancy effect is more obvious. Therefore, smoke rises......
films revealed a substantial asymmetry in the film thickness related to the plume deflection effect.The measured electrical resistivity of the Nb film was higher than that of high purity Nb bulk.The......
and upgradient of the contaminated plume and negative in the downgradient, which further confirm that from the core and upgradient of the contaminated plume to the the downgradient, the impact of biodegradation... 污染场地地下水流场和TPH污染晕空间分布图 Fig. 2 Map of groundwater flow regime and plume of TPH contaminated groundwater 图3 监测井TPH质量浓度随时间变化曲线[17] Fig. 3 Temporal variation of groundwater TPH......