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“灾害史中的年代换算（TCHD）”软件是进行年代换算的专用软件。本文研究了几种主要历法的年代换算的具体算法．介绍了该软件的结构，流程和功能．TCHD软件使灾害学和历史学等领域的研究人员摆脱了传统的朔闰表式的历法对照和检索方式，并成为灾害史工作计算机化的一部分。
The Year-Old Conversion (TCHD) software in the history of disasters is a special software for year conversion. This article studies several specific calendar year conversion algorithm. Introduced the software structure, process and function. TCHD software has enabled researchers in areas such as catastrophology and history to move away from the traditional calendars and search methods and become part of computerized disaster history.