  <span class="n">DEi</span> <span class="o">=</span> <span class="p">((</span><span class="n">dJ</span><span class="o">/</span><span class="n">KLCH</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span><span class="o">**</span><span class="mi">2</span><span class="p">,</span> <span class="p">(</span><span class="n">dC</span><span class="o">/</span><span class="n">KLCH</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span><span class="o">**</span><span cla