| 1. | It can be concluded that the normal equation of this type of problems depends only on the orbit
基于这一特点，阐明了最小二乘解算结果与是否使用参考重力场模型是无关的。 |
| 2. | The characteristics of the normal equation created in recovering the earth gravity model ( egm ) by least - squares ( ls ) adjustment from the in - situ disturbing potential has been discussed in detail
摘要讨论了在基于能量法确定地球重力场模型的过程中，利用最小二乘方法由沿轨扰动位数据解算位系数时法方程的特性，在该问题中，法方程只与卫星轨道有关。 |
| 3. | As we know , there exist some defects in solving normal equation system . in order to overcome the shortcomings , the singular - value decomposition method and its applications in direct solving the ill - conditioning observation equation are studied
最后针对法方程解算方法存在的缺点，主要研究了矩阵的奇异值分解技术在直接解算病态观测方程中的应用。 |
| 4. | A direct iteration method in solving normal equations by means of bidirectional asynchronous integral has been successfully exploited , so that it can efficiently overcome the difficulty in solving two - point boundary value problems resulting from inverse stability between state equation and co - state equation
文中提出双向异步积分迭代求解正则方程组的直接迭代法，较好解决了状态方程和协态方程稳定性相逆给求解两点边值问题带来的困难。 |
| 5. | This paper deals with the solution for 200 000 order normal equations in combined adjustment of astro - geodetic and space networks by using conjugate gradient method , puts forward a scheme of adjusting the coefficients and a strategy of separation as well as mergence between the adjustment and inversion
本文研究了用共轭梯度法解算天文大地网与空间网联合平差中20万阶法方程的有关问题，提出了“系数调整策略”和“平差与求逆既分又合的策略” 。 |
| 6. | Based on the normal equation algorithm to fir system identification and wavelet iteration , a method to estimate the wavelet from the third - order cumulant of field data is developed . due to the fact that higher order cumulant retains the phase information of the signal , and can suppress the gaussian noise ( color or white noise ) naturally , we can improve the time resolution via inverse filtering the wavelet estimated
本文在基于高阶累积量的fir系统辨识基础上，利用观测信号的三阶累积量对探地雷达子波进行估计，提出一种简单的迭代算法改善了波估计性能，据此进行反褶积，改善反射信号的信杂比和时间分辨率。 |
| 7. | It is demonstrated that the solution for 141 000 order normal equations for a simulated astro - geodetic network ( 47 057 points ) and a space one ( 476 points ) iterates 4 993 times to converge to 1 10 - 18 second , taking 28 min and 47 seconds , on a pii / 233 computer , showing over 40 times more efficiency , as compared with the coefficients unadjusted
利用模拟的天文大地网( 47057点)和空间网( 476点)在pii / 233微机上解算14 . 1万阶方程组共迭代4993次(收敛至1 10 - 18角秒) ，花费机时28分47秒，与未进行系数调整相比，功效提高40多倍。 |
