给出了分式半环的概念和泛性质。
The concept and the universal property of fractional semiring are given.
患病组中全环患者改变又较半环患考明显。
There were significant difference between normal group and patient '...
研究了半环的粗糙子半环和粗糙理想的性质；
The paper suggests the properties of rough subsemirings and rough ideal.
目的研究一类重要的幂等元半环，即乘法带半环。
Aim To study a very important class of idempotent semiring, so-called multiplicative band semirings.
从半环同态的角度出发，给出了半模的一个等价定义。
In this paper, give an equivalent definition of semi-module.
从半环同态的角度出发，给出了半模的一个等价定义。
In this paper, give an equivalent definition of semi-module.
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