{\exp {\left( -\frac{\varepsilon \ \left| {q\left( I'\right) }_i-s_i\right| }{{\nabla q}}\right) }}\right) \\&=\prod _{i=0}^{k }\left( \exp {\left( \frac{\varepsilon \left( \left| {q\left( I'\right) }_i-