自Friedman提出系统的t/s诊断[3]以来,仅对特殊的系统设计——单环系统与D?系统——获得了结果,但对一般系统的t/s诊断,除了Kyung-Yong Chwa和Hakimi研究了系统的t/t可诊断充要条件外,还未有特征性的描述.本文描述了非匀称模型[2]下一般系统的t/t和t/s可诊断性特性,对D?系统给出了t/s诊断的具体数据,从而完善了非匀称模型下对系统的各种诊断的论述. Since Friedman proposed systematic t / s diagnosis [3], the results have been obtained only for the special system designs - single-loop system and D-system - but for general system t / s diagnosis, except for Kyung-Yong Chwa And Hakimi studied the system t / t can be diagnosed the necessary and sufficient conditions, there is no characteristic description.This paper describes the t-t and t / s diagnostic characteristics of the general system under non-uniform model [2] D? The system gives t / s diagnosis of specific data, thus improving the non-symmetrical model of the various systems of diagnosis.