“signed directed graph”的概念、定义、翻译、参考文献-科学参考

单词	signed directed graph
释义	signed directed graph Encyclopedia 工学符号有向图释 signed directed graph; SDG符号有向图一种描述系统内部影响关系的定性因果模型，可基于该模型进行正向、反向推理。
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