短语词组短語local l optimum 侷部最優local flow optimum 侷部最優local optimum model 侷部最優模型local optimum detection 侷部優化檢測trapping in local optimum 陷入侷部最優的Local system -optimum 侷部系統最優local optimum search 侷部最優搜索 返回 local optimum