They slope in opposite directions, one has a positive gradient and the other has a negative gradient. The product of their gradients is -1, which means their gradients multiply to -1.

Build a patio on a slope and it can be a real focal point in your garden design, offering an elevated view, an intimate sunken space or even several terraces ...

Scientists' new mathematical x-framework allows unlimited customization of full concentration gradient (FCGs) with ...

As the gradient increases from 0‰ to 30‰, the longitudinal stress and displacement increase by more than 10%. (2) The turnout's rail strength and displacement on a 30‰ slope under the most ...