For the first time, the inversion-free explicit formulae are derived for genus 3 HECC in projective coordinate system.

首次在射影坐标系下对亏格为3的超椭圆曲线密码体制推导了无需求逆的明确公式。

youdao

The time difference equation derived from unsaturated flow equation can be approximated by Galerkin finite element or finite difference method for space coordinate derivatives.

所得的非饱和土壤水运动方程对时间的差分方程，在空间上不仅可用有限元法而且可用有限差分法处理。

youdao

However, once you start to be moving across substantial minutes of Sun derived time in an hour or three of travelling, plus you want to coordinate activities accurately in time, then you need to have just the one standard time by which you can do so.

FORBES: How Technology Determines Time