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    • 11. 发明授权
    • 유비쿼터스 센서 네트워크 환경에서의 서비스 추론 시스템
    • UBIQUITOUS传感器网络环境中的服务信号系统
    • KR101016066B1
    • 2011-02-23
    • KR1020100008367
    • 2010-01-29
    • 충남대학교산학협력단
    • 강지훈박종현한병엽
    • H04L12/12H04W84/18G06F17/00
    • H04L67/12H04L67/16
    • PURPOSE: A service inference system in ubiquitous sensor network environment is provided to inference a service result by sensing a situation from a sensing value of the sensors. CONSTITUTION: A rule management unit(210) manages regulation. An ontology management unit(220) manages the ontology. A context management unit(230) receives the request of service from the application system. According to the flow of task, the context administration unit controls the execution of service. An ontology based deduction unit(240) reasons the necessary sensor in the service. A rule based deduction unit(250) deducts a reference value according to the deduced sensors. An information collecting unit(260) transfers the sensing value of sensors to the context administration unit.
    • 目的:提供无处不在的传感器网络环境中的服务推理系统,通过感测来自传感器感应值的情况来推断服务结果。 规定:规则管理单元(210)管理规定。 本体管理单元(220)管理本体。 上下文管理单元(230)从应用系统接收服务请求。 根据任务流程,上下文管理单元控制服务的执行。 基于本体的扣除单元(240)使得服务中必需的传感器。 基于规则的扣除单元(250)根据推导的传感器扣除参考值。 信息收集单元(260)将传感器的感测值传送到上下文管理单元。
    • 16. 发明公开
    • 엑스쿼리 질의 조인 비용 추정기의 조인 연산 비용 추정 방법
    • 通过XQUERY QUERY加入成本估算器在XQUERY QUERY中估计加入成本的方法
    • KR1020100095956A
    • 2010-09-01
    • KR1020090015024
    • 2009-02-23
    • 충남대학교산학협력단
    • 강지훈박종현
    • G06F17/21G06F19/00G06F17/00
    • G06F17/30929G06F17/18
    • PURPOSE: A method for estimating a join cost in XQuery through an XQuery join cost estimator is provided to efficiently process a join operation included in the XQuery by estimating a join operation cost through estimated selectivity. CONSTITUTION: An XQuery written by a user is analyzed(201), and selectivity of each node which is joined is estimated(202). Join cost of each node pair is estimated through the selection value of estimated each node(203). The total join cost is estimated through the estimated join cost(204). The XQuery is written for distributed XML(eXtensible Displayup Language) views. The XML view comprises each node occurrence information and cardinality information.
    • 目的:提供一种通过XQuery连接成本估算器估计XQuery中的连接成本的方法,以通过估计选择性估计连接运营成本来有效地处理XQuery中包含的连接操作。 构成:分析用户编写的XQuery(201),并估计每个节点的选择性(202)。 通过估计每个节点的选择值来估计每个节点对的加入成本(203)。 总加盟成本通过估计加入成本估计(204)。 XQuery是为分布式XML(可扩展显示语言)视图编写的。 XML视图包括每个节点出现信息和基数信息。