目前,民航运输业快速发展、航班数量迅猛增加带来了海量的航班信息和数据。为保障关键数据进行高效、安全、规范地传输和共享,需对航班信息的内容和格式进行标准化和规范化,以便未来在广域信息管理系统(System Wide Information Managem...目前,民航运输业快速发展、航班数量迅猛增加带来了海量的航班信息和数据。为保障关键数据进行高效、安全、规范地传输和共享,需对航班信息的内容和格式进行标准化和规范化,以便未来在广域信息管理系统(System Wide Information Management,SWIM)中相互协作的民航业务系统间能够对整个生命周期中的航班状态有共同的态势感知。在介绍SWIM和航班信息交换模型(Flight Information Exchange Model,FIXM)的相关背景、数据字典以及逻辑模型和物理模型之间关系的基础上,系统研究了统一建模语言(UML)和XML模式定义(XSD)等关键技术。在此基础上,研究FIXM核心模型的整体架构,以及ATS报文与FIXM的映射关系。在实现方面,以领航计划报(FPL)为例对报文转换进行演示验证,使其具有灵活、扩展性强和易于传输等优势,有助于对航班信息格式标准化和未来SWIM系统部署。展开更多
The adsorption properties of XSD-296 for Cr(Ⅵ) were studied by using chemical analysis and infrared spectrometry. Experimental results show that XSD-296 resin has a good adsorption ability for Cr(Ⅵ) at pH=2.6 in the...The adsorption properties of XSD-296 for Cr(Ⅵ) were studied by using chemical analysis and infrared spectrometry. Experimental results show that XSD-296 resin has a good adsorption ability for Cr(Ⅵ) at pH=2.6 in the HAc-NaAc medium. The statically saturated adsorption capacity is 235 mg/g resin. The apparent activation energy of adsorption reaction, Ea, is 16.73 kJ/mol, and the thermodynamic parameters are △H=11.62 kJ/mol, △G298 K=-4.13 kJ/mol. The adsorption behavior of resin for Cr(Ⅵ) is in accordance with Freundlich adsorption isotherm. Cr( Ⅵ ) adsorbed on resin can be eluted by 5%NaCl-5%NaOH or 5%NH4Cl-5%NH3·H2O quantitatively. Infrared spectra and adsorption mechanism show that the functional group of resin coordinates with Cr(Ⅵ) to form co-ordination compound. The coordination molar ratio of the functional group of resin to Cr(Ⅵ) is 1:1.展开更多
为了提高航空电子总线数据采集软件的开发效率和可靠性,降低测试和仿真工作的复杂度,对当前主要的软件自动生成方法进行了分析比较和研究,并将其应用到航电总线数据采集软件中。设计了接口控制文档(ICDi,nterface control document)数...为了提高航空电子总线数据采集软件的开发效率和可靠性,降低测试和仿真工作的复杂度,对当前主要的软件自动生成方法进行了分析比较和研究,并将其应用到航电总线数据采集软件中。设计了接口控制文档(ICDi,nterface control document)数据库、知识库、类型库和词法分析器,采用XML模板生成、XSD模板验证和模板解析实现自动生成航电总线测试软件。设计实现的软件自动生成工具能够根据输入的ICD自动生成航电总线数据采集系统通信模块代码,并且代码质量可以得到保证。展开更多
文摘目前,民航运输业快速发展、航班数量迅猛增加带来了海量的航班信息和数据。为保障关键数据进行高效、安全、规范地传输和共享,需对航班信息的内容和格式进行标准化和规范化,以便未来在广域信息管理系统(System Wide Information Management,SWIM)中相互协作的民航业务系统间能够对整个生命周期中的航班状态有共同的态势感知。在介绍SWIM和航班信息交换模型(Flight Information Exchange Model,FIXM)的相关背景、数据字典以及逻辑模型和物理模型之间关系的基础上,系统研究了统一建模语言(UML)和XML模式定义(XSD)等关键技术。在此基础上,研究FIXM核心模型的整体架构,以及ATS报文与FIXM的映射关系。在实现方面,以领航计划报(FPL)为例对报文转换进行演示验证,使其具有灵活、扩展性强和易于传输等优势,有助于对航班信息格式标准化和未来SWIM系统部署。
基金Project(20040501) supported by the Department of Education of Zhejiang Province, ChinaProject(2004465) supported by the Bureau of Science and Technology of Lishui City, China
文摘The adsorption properties of XSD-296 for Cr(Ⅵ) were studied by using chemical analysis and infrared spectrometry. Experimental results show that XSD-296 resin has a good adsorption ability for Cr(Ⅵ) at pH=2.6 in the HAc-NaAc medium. The statically saturated adsorption capacity is 235 mg/g resin. The apparent activation energy of adsorption reaction, Ea, is 16.73 kJ/mol, and the thermodynamic parameters are △H=11.62 kJ/mol, △G298 K=-4.13 kJ/mol. The adsorption behavior of resin for Cr(Ⅵ) is in accordance with Freundlich adsorption isotherm. Cr( Ⅵ ) adsorbed on resin can be eluted by 5%NaCl-5%NaOH or 5%NH4Cl-5%NH3·H2O quantitatively. Infrared spectra and adsorption mechanism show that the functional group of resin coordinates with Cr(Ⅵ) to form co-ordination compound. The coordination molar ratio of the functional group of resin to Cr(Ⅵ) is 1:1.
文摘为了提高航空电子总线数据采集软件的开发效率和可靠性,降低测试和仿真工作的复杂度,对当前主要的软件自动生成方法进行了分析比较和研究,并将其应用到航电总线数据采集软件中。设计了接口控制文档(ICDi,nterface control document)数据库、知识库、类型库和词法分析器,采用XML模板生成、XSD模板验证和模板解析实现自动生成航电总线测试软件。设计实现的软件自动生成工具能够根据输入的ICD自动生成航电总线数据采集系统通信模块代码,并且代码质量可以得到保证。
