提出并实现了一个以特定领域的概念化模型——领域本体作为统一语义模型的关系数据库网上发布与集成系统DIDSBS。该系统从领域本体出发，提出并实现了形式化本体和DTD(Document Type Definition ，文档类型定义)、DTD和关系视图的转换算...提出并实现了一个以特定领域的概念化模型——领域本体作为统一语义模型的关系数据库网上发布与集成系统DIDSBS。该系统从领域本体出发，提出并实现了形式化本体和DTD(Document Type Definition ，文档类型定义)、DTD和关系视图的转换算法,实现了XML文档和数据库视图在语义和结构上的对应关系。展开更多
The authors propose a new "three-layer" conceptual model for the air-sea exchange of organic gases, which includes a dynamic surface microlayer with photochemical and biological processes. A parameterization...The authors propose a new "three-layer" conceptual model for the air-sea exchange of organic gases, which includes a dynamic surface microlayer with photochemical and biological processes. A parameterization of this three-layer model is presented, which was used to calculate the air-sea fluxes of acetone over the Pacific Ocean. The air-sea fluxes of acetone calculated by the three-layer model are in the same direction but possess half the magnitude of the fluxes calculated by the traditional two-layer model in the absence of photochemical and biological processes. However, photochemical and biological processes impacting acetone in the microlayer can greatly vary the calculated fluxes in the three-layer model, even reversing their direction under favorable conditions. Our model may help explain the discrepancies between measured and calculated acetone fluxes in previous studies. More measurements are needed to validate our conceptual model and provide constraints on the model parameters.展开更多
文摘提出并实现了一个以特定领域的概念化模型——领域本体作为统一语义模型的关系数据库网上发布与集成系统DIDSBS。该系统从领域本体出发，提出并实现了形式化本体和DTD(Document Type Definition ，文档类型定义)、DTD和关系视图的转换算法,实现了XML文档和数据库视图在语义和结构上的对应关系。
基金funded by the National Natural Science Foundation of China (Grant No. 41222035)
文摘The authors propose a new "three-layer" conceptual model for the air-sea exchange of organic gases, which includes a dynamic surface microlayer with photochemical and biological processes. A parameterization of this three-layer model is presented, which was used to calculate the air-sea fluxes of acetone over the Pacific Ocean. The air-sea fluxes of acetone calculated by the three-layer model are in the same direction but possess half the magnitude of the fluxes calculated by the traditional two-layer model in the absence of photochemical and biological processes. However, photochemical and biological processes impacting acetone in the microlayer can greatly vary the calculated fluxes in the three-layer model, even reversing their direction under favorable conditions. Our model may help explain the discrepancies between measured and calculated acetone fluxes in previous studies. More measurements are needed to validate our conceptual model and provide constraints on the model parameters.
