Many microwave reactors widely used in laboratory are made from commercial microwave ovens.In this paper, the heating process inside the reactor was simulated in order to obtain the final temperature distribution in t...Many microwave reactors widely used in laboratory are made from commercial microwave ovens.In this paper, the heating process inside the reactor was simulated in order to obtain the final temperature distribution in the solution in a beaker.Maxwell’s equations and the heat transport equation (HTE) were coupled to calculate the temperature results by means of the finite element method (FEM).In the calculation, Debye’s equation and Huang’s method were used to describe the temperature and time dependence of dielectric properties.Due to the non-uniform distribution of fields in the cavity, the heating results varied significantly with the position of the beaker.This could be more obvious for a chemical reaction because of the non-equilibrium characteristics.It was also observed that the repeatability of experiments was poor even for a fixed position of the beaker due to the magnetron instability.Therefore, such chemical reactors made from commercial microwave ovens can hardly ensure the repeatability of experiments.展开更多
提出了面向对象的、基于模块化的组件设计以及将Web应用程序的主要功能分离到不同的层中设计方案。 Net Framework为创建可维护、可扩展的层模式提供了丰富的支持,使得三层架构在企业Web应用中的开发更方便、快捷。同时,结合ASP．NET+Or...提出了面向对象的、基于模块化的组件设计以及将Web应用程序的主要功能分离到不同的层中设计方案。 Net Framework为创建可维护、可扩展的层模式提供了丰富的支持,使得三层架构在企业Web应用中的开发更方便、快捷。同时,结合ASP．NET+Oracle具体实例说明其应用并通过UML(统一建模语言)阐述三层之间的交互。展开更多
文摘Many microwave reactors widely used in laboratory are made from commercial microwave ovens.In this paper, the heating process inside the reactor was simulated in order to obtain the final temperature distribution in the solution in a beaker.Maxwell’s equations and the heat transport equation (HTE) were coupled to calculate the temperature results by means of the finite element method (FEM).In the calculation, Debye’s equation and Huang’s method were used to describe the temperature and time dependence of dielectric properties.Due to the non-uniform distribution of fields in the cavity, the heating results varied significantly with the position of the beaker.This could be more obvious for a chemical reaction because of the non-equilibrium characteristics.It was also observed that the repeatability of experiments was poor even for a fixed position of the beaker due to the magnetron instability.Therefore, such chemical reactors made from commercial microwave ovens can hardly ensure the repeatability of experiments.
文摘提出了面向对象的、基于模块化的组件设计以及将Web应用程序的主要功能分离到不同的层中设计方案。 Net Framework为创建可维护、可扩展的层模式提供了丰富的支持,使得三层架构在企业Web应用中的开发更方便、快捷。同时,结合ASP．NET+Oracle具体实例说明其应用并通过UML(统一建模语言)阐述三层之间的交互。
