In this paper,based on probabilistic and cognitive uncertainties,we set up an uncertain database model and presented the uncertain relational algebra ,and proved that the uncertain normal forms are closed under operat...In this paper,based on probabilistic and cognitive uncertainties,we set up an uncertain database model and presented the uncertain relational algebra ,and proved that the uncertain normal forms are closed under operations of the uncertain relational algebra. At last ,we studied the semantics of the uncertain relation.展开更多
论述了功能、效应、知识3者之间的关系,提出了FEK(FEK:function-effect-knowledge)概念设计模型,以该模型为基础来构建传感器概念设计专家系统。首先采用关系数据库实现专家系统知识库;其次利用遗传算法优化效应链,建立效应模糊神经网...论述了功能、效应、知识3者之间的关系,提出了FEK(FEK:function-effect-knowledge)概念设计模型,以该模型为基础来构建传感器概念设计专家系统。首先采用关系数据库实现专家系统知识库;其次利用遗传算法优化效应链,建立效应模糊神经网络数学模型;最后用VS.NET和Microsoft SQL Server 2000作为前后台开发软件来开发传感器概念设计专家系统。所开发的专家系统运行良好,能够为传感器产品设计师在设计过程中提供启发性知识,但系统仍需不断地完善。展开更多
文摘In this paper,based on probabilistic and cognitive uncertainties,we set up an uncertain database model and presented the uncertain relational algebra ,and proved that the uncertain normal forms are closed under operations of the uncertain relational algebra. At last ,we studied the semantics of the uncertain relation.
文摘论述了功能、效应、知识3者之间的关系,提出了FEK(FEK:function-effect-knowledge)概念设计模型,以该模型为基础来构建传感器概念设计专家系统。首先采用关系数据库实现专家系统知识库;其次利用遗传算法优化效应链,建立效应模糊神经网络数学模型;最后用VS.NET和Microsoft SQL Server 2000作为前后台开发软件来开发传感器概念设计专家系统。所开发的专家系统运行良好,能够为传感器产品设计师在设计过程中提供启发性知识,但系统仍需不断地完善。
