New development on additive manufacturing technology and its applications

Additive manufacturing technology has been developed in Xi＇ an Jiaotong University for almost 20 years. Up to now~ it is still attracting the attentions of the researchers or manufacturers all over the world. Some in- novative processes and frontier application research are all being conducted here to catch up with the new develop- ment of this technology. In the paper, newly developed processes, such as ultraviolet-light emitting diode （UV- LED） stereolithography, ceramic stereolithography, and direct metal forming, were described. Some results of the frontier application researches, such as indirect fabrication of ceramic casting mould, wind-tunnel-testing models, photonic crystals and metamatcrials, were also briefly reviewed.

熹平石经“后记碑”考述

熹平石经“后记碑”记录石经刊刻事宜,可补史籍未备。本文全面汇辑民国以来出土、著录的“后记碑”文字,共得470字。从碑座形制方面否定了将“后记碑”等同于“太学赞碑”的观点。并针对刻时、真伪、文字尺寸、刻立人员等进行考述。参考唐石经的《郑覃进石经状》,结合“后记碑”残石,推测“后记碑”内容大致包括对刻立经文、刻立缘起、参与人员、赞美功成等方面内容。