此外，在求解烧蚀子程序时，提出了一种简便有效的赋初值方法。
In addition, when solving the ablation subroutine, a convenient and effective method for setting initial value was proposed.
研究了用两颗全球定位系统(GPS)卫星粗略确定低轨卫星轨道的问题，并着重讨论了其中的初值问题，给出了一种有效的初值方法。
Based on the research of orbit determination by using two GPS satellites, this paper discusses the initial value problem and provides an effective method of getting initial value.
本文将新的赋初值方法与旧的赋初值方法作了详细的比较，仿真实验结果表明，利用反算得到的仿射变换系数进行赋初值，可以提高效率和测量精度。
Comparison of the new methods with the old ones by simulated images revealed that higher efficient and accuracy could be achieved by introducing affine transform into initial parameter vector.
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