基于数据库的可视化水蒸汽电子图表

针对目前查询水蒸汽性质软件存在的问题，将全范围水和水蒸汽性质参数库与模拟人工查询程序相结合，开发了基于数据库的查询软件，并实现了可视化、模块化、网络化。通过该软件可以实现焓熵图、状态参数的查询、热力过程线的比较和绘制等功能。具有速度快、范围广、精度高、人性化的特点。除了可独立使用和在网上发布外，所形成的动态链接库和Active X控件可供各种编程语言调用。

The Visual Cyber-chart of Water and Steam's Thermo-properties Based on Database

Aiming at the current problems with water and steam thermodynamic properties inquiry software, a visual and modularized inquiry software based on a database was developed. Utilizing the whole range of parameters for the properties of water and steam, the software can simulate manual inquiry processes. The functions of the software include searching enthalpy-entropy values, inquiring about state parameters, drawing thermodynamic process lines and others. The software is characterized by rapidity, flexibility as well as precision. It can be used independently and is available on the Internet. Also, its DLL and Active X can be used with a variety of programming languages conveniently.