pan class="n">_masks</span><span class="p">,</span> <span class="n">_a</span><span class="p">)</span>
</span><span id="Sublosses.window_diff-48"><a href="#Sublosses.window_diff-48"><span class="linenos">48</span></a>    <span class="n">_b_masked</span> <span class="o">=</span> <span class="n">tf</span><span class="o">.</span><span class="n">linalg</span><span class="o">.</span><span class="n">matvec</span><span class="p">(</span><span class="n">_masks</span><span class="p">,</span> <span class="n">_b</span>