Constraints (e.g., a payment cannot exceed a certain value) and derivation rules (e.g., the computation of interest), especially when these are relevant to more than one use case.
限制因素(举例来说，一个支付不能够超过一个特定的数值)和推导规则(举例来说，利息计算)，尤其当这些不仅仅与一个用例相关时。
The curvature image of fingerprint was calculated by using difference derivation, and the core point was searched complying with certain rules.
该算法利用差分求导的方法求得指纹的曲率场，并按照一定的规则搜索参考点。
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