By the transformation theory of the adjustment, only the full rank transformation could get a full equivalent adjustment result to original observations.

按照平差变换理论，只有满秩变换，才能得到与原观测完全等价的平差结果。

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With two types of observations, using Helmert variance component estimation, it can improve adjustment precision through multiple iterations.

并对两类观测值，利用赫尔默特方差分量估计，通过多次迭代计算，提高平差精度。

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The practical applications of these methods are illustrated by taking triangulation adjustment and that of correlated observations in groups as examples.

举例说明了具有奇异协方差阵观测值的三角网平差和相关分组平差的实施。

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Based on these results and observations, a model of glacier evolution is proposed, involving an adjustment phase, thinning phase, areal-retreat phase, and fragmentation phase.

UNESCO: Dublin Core