Maximum modulus principle plays an important role in the complex analytics, and it is a powerful tool in studying the analytic function. 摘要最大模原理在複變函數論中佔有重要的地位，是研究解析函數的有力工具。
This paper discusses the object-orientated modeling principle of die casting database and gives a realization and visualization method for the database system. 採用面向對象的方法，論述了壓鑄工藝資料庫的建模原理，給出了資料庫的實現及其可視化方法。
