The concept of finitely continuous topological space is introduced and the basic properties of the space are given. Several continuous selection theorems and fixed point theorems for Ф-maps are established, and as ap...The concept of finitely continuous topological space is introduced and the basic properties of the space are given. Several continuous selection theorems and fixed point theorems for Ф-maps are established, and as applications of the above fixed point theorems, some section problems are discussed. The results generalize and improve many corresponding conclusions.展开更多
Based on the high frequency （HF） integrated radar cross section （RCS） calculation approach, a technique of detecting major scattering source is developed by using an appropriate arithmetic for scattering distribut...Based on the high frequency （HF） integrated radar cross section （RCS） calculation approach, a technique of detecting major scattering source is developed by using an appropriate arithmetic for scattering distribution and scattering source detection. For the perfect adaptability to targets and the HF of the HF integrated RCS calculation platform, this technique is suitable to solve large complex targets and has lower requirement to the target modeling. A comparison with the result of 2-D radar imaging confirms the accuracy and reliability of this technique in recognition of the major scattering source on complex targets. This technique provides the foundation for rapid integrated evaluation of the scattering performance and 3-D scattering model reconstruction of large complex targets.展开更多
基于SuperMap系列软件的平台下构建并发布地图服务,通过运用SuperMap iDesktop软件实现全国地图的构建,运用SuperMap i Server软件对构建的地图发布服务,检验其服务效果,最后基于网络GIS平台以Java Script为编程语言开发用于浏览器交互...基于SuperMap系列软件的平台下构建并发布地图服务,通过运用SuperMap iDesktop软件实现全国地图的构建,运用SuperMap i Server软件对构建的地图发布服务,检验其服务效果,最后基于网络GIS平台以Java Script为编程语言开发用于浏览器交互浏览的GIS系统,实现相应的功能。展开更多
文摘The concept of finitely continuous topological space is introduced and the basic properties of the space are given. Several continuous selection theorems and fixed point theorems for Ф-maps are established, and as applications of the above fixed point theorems, some section problems are discussed. The results generalize and improve many corresponding conclusions.
基金supported by the National Natural Science Foundation of China (Grant No.90305026)
文摘Based on the high frequency （HF） integrated radar cross section （RCS） calculation approach, a technique of detecting major scattering source is developed by using an appropriate arithmetic for scattering distribution and scattering source detection. For the perfect adaptability to targets and the HF of the HF integrated RCS calculation platform, this technique is suitable to solve large complex targets and has lower requirement to the target modeling. A comparison with the result of 2-D radar imaging confirms the accuracy and reliability of this technique in recognition of the major scattering source on complex targets. This technique provides the foundation for rapid integrated evaluation of the scattering performance and 3-D scattering model reconstruction of large complex targets.
文摘基于SuperMap系列软件的平台下构建并发布地图服务,通过运用SuperMap iDesktop软件实现全国地图的构建,运用SuperMap i Server软件对构建的地图发布服务,检验其服务效果,最后基于网络GIS平台以Java Script为编程语言开发用于浏览器交互浏览的GIS系统,实现相应的功能。
