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辐射屏法输热管网隔热保温的参数确定方法及计算结果 被引量:3
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作者 李业发 《热能动力工程》 EI CAS CSCD 北大核心 2001年第2期199-201,共3页
在实验和工程应用的基础上 ,介绍了利用辐射屏法对热网管道进行隔热保温中确定辐射屏的层数及间隔的方法 ,并给出了 40种不同管径或温度的计算结果 。
关键词 辐射屏法 当量导热系数 热网管道 隔热保温
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Research on positioning enhancement scheme of CAPS via UWB pseudolite 被引量:1
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作者 XIAO Zhu BAI Jing +2 位作者 MA GuanYi FAN JiangTao YI KeChu 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第4期733-737,共5页
The positioning precision of the transmitting Chinese Area Positioning System(CAPS) is reduced due to the non-ideal distribution of the satellite constellation.Positioning and navigation enhancement methods are able t... The positioning precision of the transmitting Chinese Area Positioning System(CAPS) is reduced due to the non-ideal distribution of the satellite constellation.Positioning and navigation enhancement methods are able to improve the reliability and accuracy of the positioning system,especially for users in special regions and special applications.In this paper,a positioning enhanced scheme based on ultra-wide band(UWB) pseudolite is proposed for CAPS.It is demonstrated that the link budget of UWB pseudolite satisfies the FCC's emission mask requirements.The localization algorithm of the enhanced CAPS is presented.The simulations indicate that the positioning precision of the proposed enhanced scheme is improved greatly,and the feasibility of the enhanced scheme is thus proved. 展开更多
关键词 CAPS UWB positioning enhancement PSEUDOLITE
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