本文探讨亏秩自由网的几种常用解法的分区平差原理，提出了几种分区平差方法。
This paper deals with the principles of several solutions used generally in the partitioning adjustment of a free network with rank-defects, and several adjustment methods are suggested.
尽管本文只讨论平面控制网，但它所提出的方法也可用于加权亏秩自由水准网的平差。
Although this paper deals only with the plane control network, the method that the paper puts forward may also be used to adjust other types of free network.
从物理角度说明秩亏网平差基准的含意，可加深人们对平差结果性质的认识，因而更有利于工程技术人员选择合适的方法解决实际问题。
These conclusions are conducive for technical personnels to comprehend the properties of rank-deficient adjustment and to employ proper methods in engineering. The results, …
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