Ⅰ. INTRODUCTION Because Fe-Mn base alloys have Invar and Elinvar effects below the antimagnetic transformation point T_N and because the alloys are free of precious elements, more attention has been paid to them in t...Ⅰ. INTRODUCTION Because Fe-Mn base alloys have Invar and Elinvar effects below the antimagnetic transformation point T_N and because the alloys are free of precious elements, more attention has been paid to them in the investigation of non-magnetic low expansion and nonmagnetic constant elastic alloys. In Ref. [3] the effect of cold deformation and展开更多
Ⅰ. INTRODUCTIONBecause Fe-Mn base alloys have Invar and Elinvar effects below the anti-magnetic transformation point T_N and because the alloys are free of precious elements, more atten-
Terra SAR-X图像的几何校正和辐射定标对于获取地面目标高精度地理位置信息和辐射特征具有重要意义。采用距离-多普勒间接定位模型和仿射校正模型进行SAR影像几何校正,同时完成地形辐射校正并对辐射定标精度进行验证。距离向和方位向上...Terra SAR-X图像的几何校正和辐射定标对于获取地面目标高精度地理位置信息和辐射特征具有重要意义。采用距离-多普勒间接定位模型和仿射校正模型进行SAR影像几何校正,同时完成地形辐射校正并对辐射定标精度进行验证。距离向和方位向上达到了约0.3 m和0.4 m的几何定位精度;相对辐射定标精度优于0.3 d B,绝对辐射定标精度为0.22 d B,所以该模型能达到方法较高的精度且简单快捷。展开更多
文摘Ⅰ. INTRODUCTION Because Fe-Mn base alloys have Invar and Elinvar effects below the antimagnetic transformation point T_N and because the alloys are free of precious elements, more attention has been paid to them in the investigation of non-magnetic low expansion and nonmagnetic constant elastic alloys. In Ref. [3] the effect of cold deformation and
文摘Ⅰ. INTRODUCTIONBecause Fe-Mn base alloys have Invar and Elinvar effects below the anti-magnetic transformation point T_N and because the alloys are free of precious elements, more atten-
文摘Terra SAR-X图像的几何校正和辐射定标对于获取地面目标高精度地理位置信息和辐射特征具有重要意义。采用距离-多普勒间接定位模型和仿射校正模型进行SAR影像几何校正,同时完成地形辐射校正并对辐射定标精度进行验证。距离向和方位向上达到了约0.3 m和0.4 m的几何定位精度;相对辐射定标精度优于0.3 d B,绝对辐射定标精度为0.22 d B,所以该模型能达到方法较高的精度且简单快捷。
