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id="con"></a>概念：据/h2> <blockquote> <h3>缺口：据/h3> </blockquote><p>凹口被视为具有水位低于其上边缘的孔口。凹口由金属板制成，其使用是测量液体的排出。这些用于测量来自血管或罐的水流，没有压力流。由于液位上方的凹口的顶部边缘没有目的，因此凹口可以仅具有底部边缘和侧面。据/p> <blockquote> <h4>窗台“或”一个陷波的嵴：据/h4> </blockquote><p>液体流的底部边缘称为缺口的窗台或嵴。据/p></td> </tr> <tr> <td colspan="2"> <blockquote> <h4>矩形缺口：据/h4> </blockquote><p>矩形形状的凹口称为矩形凹口。放电系数（CD）：实际放电与理论放电之间的比率。数学：据/p><p align="center"><img src="//www.angierios.com/new/imajes/equation.jpg" alt="凹口放电方程" width="227" height="216"></p><h2><a name="pro" id="pro"></a>程序：据/h2><p>下面给出逐步过程：据img src="//www.angierios.com/new/imajes/rectangular-notch-sketch.png" alt="矩形凹口" width="507" height="326" align="right"></p> <ol> <li>固定在液压凳的水通道中具有矩形凹口的板。据/li> <li>转动液压工作台;水将在通道中积聚。据/li> <li>当水位达到凹口或凹口的距离停止流入并记下读数，并将其设计为H1。据/li> <li>重新启动替补席，并记下累积在长凳容量坦克中的水的体积和时间，从该发现放电，并注意到这一点上的水高度。据/li> <li>找到h = h2 - h1这将把头部放在凹口上。据/li> <li>找到缺口的宽度。据/li> <li>使用上述程序通过在凹口通过凹口改变排出头来采取不同的读数。据/li> <li>在log10h和log10q之间绘制图形，并从图形方程找到k。据/li> </ol><p>从以下公式中查找CD。CD = 2/3 x K /√2gx b据/p><p align="center">b = 3厘米据/p> <table width="749" height="161" border="1" align="center" cellpadding="0" cellspacing="0"> <tbody> <tr> <td width="81" height="32" valign="top"><p align="center"><strong>S.NO.据/strong></p></td> <td width="81" valign="top"><p align="center"><strong>H1（cm）据/strong></p></td> <td width="81" valign="top"><p align="center"><strong>H2（cm）据/strong></p></td> <td width="81" valign="top"><p align="center"><strong>h（cm）据/strong></p></td> <td width="94" valign="top"><p align="center"><strong>体积（升据/strong>）据/p></td> <td width="68" valign="top"><p align="center"><strong>时间（秒）据/strong></p></td> <td width="81" valign="top"><p align="center"><strong>q（c m据sup>3.据/sup>/秒）据/strong></p></td> <td width="81" valign="top"><p align="center"><strong>log10h.据/strong></p></td> <td width="81" valign="top"><p align="center"><strong>log10q.据/strong></p></td> </tr> <tr> <td width="81" valign="top"><p align="center">1据/p></td> <td width="81" valign="top"><p align="center">8.6据/p></td> <td width="81" valign="top"><p align="center">11.3据/p></td> <td width="81" valign="top"><p align="center">2.7据/p></td> <td width="94" valign="top"><p align="center">5.据/p></td> <td width="68" valign="top"><p align="center">16.58据/p></td> <td width="81" valign="top"><p align="center">301.56据/p></td> <td width="81" valign="top"><p align="center">0.431据/p></td> <td width="81" valign="top"><p align="center">2.47据/p></td> </tr> <tr> <td width="81" valign="top"><p align="center">2据/p></td> <td width="81" valign="top"><p align="center">8.6据/p></td> <td width="81" valign="top"><p align="center">12.6据/p></td> <td width="81" valign="top"><p align="center">4.据/p></td> <td width="94" valign="top"><p align="center">5.据/p></td> <td width="68" valign="top"><p align="center">9.26据/p></td> <td width="81" valign="top"><p align="center">539.95.据/p></td> <td width="81" valign="top"><p align="center">0.602据/p></td> <td width="81" valign="top"><p align="center">2.73据/p></td> </tr> <tr> <td width="81" valign="top"><p align="center">3.据/p></td> <td width="81" valign="top"><p align="center">8.6据/p></td> <td width="81" valign="top"><p align="center">13.7据/p></td> <td width="81" valign="top"><p align="center">5.1据/p></td> <td width="94" valign="top"><p align="center">5.据/p></td> <td width="68" valign="top"><p align="center">6.82据/p></td> <td width="81" valign="top"><p align="center">733.13据/p></td> <td width="81" valign="top"><p align="center">0.707据/p></td> <td width="81" valign="top"><p align="center">2.86据/p></td> </tr> <tr> <td width="81" valign="top"><p align="center">4.据/p></td> <td width="81" valign="top"><p align="center">8.6据/p></td> <td width="81" valign="top"><p align="center">14.600据/p></td> <td width="81" valign="top"><p align="center">6.据/p></td> <td width="94" valign="top"><p align="center">5.据/p></td> <td width="68" valign="top"><p align="center">5.01据/p></td> <td width="81" valign="top"><p align="center">998.003据/p></td> <td width="81" valign="top"><p align="center">0.778据/p></td> <td width="81" valign="top"><p align="center">3.据/p></td> </tr> </tbody> </table><p align="center"></p></td> </tr> <tr> <td align="center" background="imajes/black-back.png"><span class="style158">相关文章据/span></td> <td rowspan="2" align="center"></td> </tr> <tr> <td align="left"><p><img src="//www.angierios.com/new/imajes/bend-test-on-steel.jpg" alt="箭头" width="50" height="52" align="left"><a href="//www.angierios.com/new/Bend-test-on-steel-bar.html" class="style159">钢筋上的弯曲试验据/a><br><span class="style160">弯曲试验是一种评估延展性的一种方法，但不能被认为是定量手段据/span>....据/p><p><img src="//www.angierios.com/new/imajes/simply-supported-beam-reactions.png" alt="箭头" width="50" height="35" align="left"><a href="//www.angierios.com/new/simply-supported-beam-reactions.html" class="style159">简单地支撑梁的反应据/a><br><span class="style160">当光束处于平衡时，您可以将力的瞬间与任何点的力矩和设置为等于零据/span></p><p><img src="//www.angierios.com/new/imajes/deflection.jpg" alt="箭头" width="50" height="51" align="left"><a 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