给予相同的位元，无号整数通常能表示由有号整数所代表的值的绝对值的两倍数目。
Given the same number of bits, unsigned integers usually represent twice the number of absolute values representable by signed integers.
定义了变换近环，然后证明了任意一个有单位元的近环与它的变换近环同构；任意一个无零因子近环与它的变换近环同。
The commutation near ring defined, it is proved that the near ring of an arbitrary near ring with its unit dimension is isomorphous with its commutation near ring.
本文推导了星载测定外方位元素参与下，无地面控制点卫星摄影测量高程误差估算公式。
This paper deduces elevation error estimating formulae of the satellite photogrammetry, which is concerned with elements of exterior orientation that measured by spaceborne sensors.
本文推导了星载测定外方位元素参与下，无地面控制点卫星摄影测量高程误差估算公式。
This paper deduces elevation error estimating formulae of the satellite photogrammetry, which is concerned with elements of exterior orientation that measured by spaceborne sensors.
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