In order to get FDTD iterative computation stable FDTD numerical method should increase the subsidiary variable and the corresponding auxiliary difference equation .
FDTDu6570u503cu8ba1u7b97u8981u91c7u7528u589eu52a0 u8f85u52a9 u53d8u91cfu548cu76f8u5e94u7684u8f85u52a9u5deeu5206u65b9u7a0bu7684u65b9u6cd5u4f7fFDTDu8fedu4ee3u8ba1u7b97u7a33u5b9au3002
美[səbˈsɪdiˌɛri ˈvɛriəbəl]英[səbˈsidiəri ˈvɛəriəbl]
[经] 辅助变量