为方便铁路监理工作,实现铁路监理随时随地办公,在对铁路项目监理现场和铁路监理公司进行充分调研之后,针对铁路监理工作的特点和监理工程师的需求,开发铁路工程监理系统。该应用基于Android操作系统,以SQL Server 2005为远程数据库。通...为方便铁路监理工作,实现铁路监理随时随地办公,在对铁路项目监理现场和铁路监理公司进行充分调研之后,针对铁路监理工作的特点和监理工程师的需求,开发铁路工程监理系统。该应用基于Android操作系统,以SQL Server 2005为远程数据库。通过Http URLConnection和Http Client接口实现网络访问,开发规范查询和工程项目信息查询等功能。在现有铁路监理公司办公流程和监理工程师现场监督方式的基础上,基于MQTT协议实现了消息主动推送,开发监理基本表式和待办任务等模块。研究结果表明:该系统运行稳定,界面友好且易于扩展。展开更多
The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this wo...The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this work.The following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution function.The results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient decreases.Additionally,the excess molar volume initially decreases,reaches a minimum,and then increases.The rules of radial distribution functions(RDFs)of characteristic atoms are different.With increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then decreases.This indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.展开更多
文摘为方便铁路监理工作,实现铁路监理随时随地办公,在对铁路项目监理现场和铁路监理公司进行充分调研之后,针对铁路监理工作的特点和监理工程师的需求,开发铁路工程监理系统。该应用基于Android操作系统,以SQL Server 2005为远程数据库。通过Http URLConnection和Http Client接口实现网络访问,开发规范查询和工程项目信息查询等功能。在现有铁路监理公司办公流程和监理工程师现场监督方式的基础上,基于MQTT协议实现了消息主动推送,开发监理基本表式和待办任务等模块。研究结果表明:该系统运行稳定,界面友好且易于扩展。
文摘The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this work.The following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution function.The results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient decreases.Additionally,the excess molar volume initially decreases,reaches a minimum,and then increases.The rules of radial distribution functions(RDFs)of characteristic atoms are different.With increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then decreases.This indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.
