针对火车站的订票实际情况，按照软件工程的结构化设计思想，满足火车站网上订票的基本要求，包括查询、订票、退票等功能-The actual situation for the station' s booking, in accordance with a structured software engineering design, to meet the basic requirements for online booking station, including inquiries,

二维热传导结构化网格计算程序，用于计算初温为0时各种边界条件下矩形网格的温度云图-Dimensional heat conduction structured grid computing program for the calculation of the initial temperature of the rectangular grid temperature cloud images under various boundary conditions 0:00