径向基函数在重力场建模及数据融合中的应用研究-畅读网

　　　　

径向基函数在重力场建模及数据融合中的应用研究

作者：马志伟

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地球重力场模型通常用球谐函数进行表达，但由于球谐函数具有全局紧支撑特性，任何一个球谐系数的变化都会引起整个重力场的改变，不适用于局部重力场模型的精化。径向基函数——一种在空间域和频率域都具有良好局部化特性的函数，近些年来受到了越来越多的关注。径向基函数能够根据观测数据的空间分布、频谱特性灵活地做出调整，并可以联合多种数据共同建模，在表示局部重力场方面展现出很大的优势。本书重点探索径向基函数在融合多源重力数据和构建高精度、高分辨率地球重力场模型方面的能力。

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SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.004020s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 4 LIMIT 1 [ RunTime:0.003103s ]
SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 40 LIMIT 1 [ RunTime:0.003758s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.004497s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.004651s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1746440187 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:0.725974s ]

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