共搜索到15232条信息,每页显示10条信息,共1524页。用时:0小时0分0秒503毫秒
by field assisted sintering RAO Wei-dong(饶为栋)1, 2, LIU Yao(刘耀)1, 3, CHENG Li-jing(程立金)4, LIU Shao-jun(刘绍军)1, 2 1. State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China... additive with field assisted sintering, stereolithographical dense Si3N4 ceramics was successfully fabricated. Owing to a large amount of polymer during the stereolithography, the green parts have......
......
Paulo, Brazil Received 1 November 2017; accepted 24 April 2018 Abstract: A novel, Nb- and Si-rich and Be-free Ni-based alloy was cast by two methods of investment casting and continuous casting... stages of solidification by investment casting, while the formation of AlNi6Si3 was suppressed by continuous casting. The Scheil solidification model agreed very well with the experimental results. Key......
and Astronautics, Nanjing 210016, China) Abstract: The 3D fracture field distribution model of goaf and overlying strata was derived on the basis of the continuous surface mathematical model of overlying... in the internal range. Key words: goaf; overlying strata; continuous surface model; 3D fracture field; porosity 随着煤炭开采强度的日益加深,采空区遗煤自燃,瓦斯涌出以及煤与瓦斯共存条件下的耦合灾害对井下安全生产的危害愈加突出,因此掌握采空区火与瓦斯的热质传递规律以及防灭火介质的流动特性对防治采空区火与瓦斯灾害显得尤......
......
; 文献标志码:A Numerical simulation of arc plasma fluid field in VAR process for titanium alloy SUN Lai-xi, XUE Xiang-yi, YANG Zhi-jun, KOU Hong-chao, HU Rui, LI Jin-shan (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China) Abstract: A numerical simulation of arc region fluid field was done by ANSYS finite element analytical......
......
Effect of asymmetrical channel chirping on field intensity patterns of supermodes and modal discrimination in index guided laser arraysKee-Young Kwon(College of Engineering, Kongju National University, Changnum 331-717, Korea)Abstract:The effect of channel-width chirping on near- and far-field intensity patterns of the six supermodes was investigated. The supermode discrimination was evaluated......
......
......