public void AssignmentSymbolInCognitiveGraph(String symbol){
		//功能：
		//找到激活强度最高的节点，对节点的Symbol属性赋值
		
		//先找到high
		int high;
		int GraphSize=CognitiveGraph.size();
		high=CognitiveGraph.get(0).ObjOrAttri.get(0).ActivatedLevel;
		for(int i=0;i<GraphSize;i++){
			int ListSize=CognitiveGraph.get(i).ObjOrAttri.size();
			for(int ii=0;ii<ListSize;ii++){
				if(CognitiveGraph.get(i).ObjOrAttri.get(ii).ActivatedLevel>high){
					high=CognitiveGraph.get(i).ObjOrAttri.get(ii).ActivatedLevel;
				}
			}
		}

		for(int i=0;i<GraphSize;i++)
		{
			int ListSize=CognitiveGraph.get(i).ObjOrAttri.size();
			for(int ii=0;ii<ListSize;ii++)
			{
				if(CognitiveGraph.get(i).ObjOrAttri.get(ii).Symbol.equals("") && CognitiveGraph.get(i).ObjOrAttri.get(ii).ActivatedLevel==high)
				{
					CognitiveGraph.get(i).ObjOrAttri.get(ii).Symbol=symbol;
					break;

				}
			}
		}
	}