http://nice-learning.net/nlWiki/index.php?action=history&feed=atom&title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B 白努利定律 - 修訂歷史 2026-05-01T21:12:04Z 本 Wiki 上此頁面的修訂歷史 MediaWiki 1.34.2 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=4161&oldid=prev 丁志仁 於 2021年1月3日 (日) 01:22 2021-01-03T01:22:03Z <p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2021年1月3日 (日) 01:22 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >行 1：</td> <td colspan="2" class="diff-lineno">行 1：</td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[分類:大學物理]]</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>公式：</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>公式：</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;i&gt;p ＋ ½ρv&lt;sup&gt;2&lt;/sup&gt; ＋ ρgh&lt;/i&gt; = 常數</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;i&gt;p ＋ ½ρv&lt;sup&gt;2&lt;/sup&gt; ＋ ρgh&lt;/i&gt; = 常數</div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3787:rev-4161 --> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3787&oldid=prev 丁志仁：/* 側方開孔量壓力差 */ 2020-12-20T10:26:36Z <p><span dir="auto"><span class="autocomment">側方開孔量壓力差</span></span></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 10:26 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l33" >行 33：</td> <td colspan="2" class="diff-lineno">行 33：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (A&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;/A&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − 1) v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">ρh = </ins>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ <ins class="diffchange diffchange-inline">(A&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;/A&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − 1) v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;br/&gt;</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">h=½ </ins>(A&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;/A&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − 1) v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;</div></td></tr> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3786&oldid=prev 丁志仁：/* 側方開孔量壓力差 */ 2020-12-20T10:21:52Z <p><span dir="auto"><span class="autocomment">側方開孔量壓力差</span></span></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 10:21 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l33" >行 33：</td> <td colspan="2" class="diff-lineno">行 33：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (A&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;/A&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − 1)v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (A&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;/A&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − 1) v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;</div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3785:rev-3786 --> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3785&oldid=prev 丁志仁：/* 側方開孔量壓力差 */ 2020-12-20T10:21:30Z <p><span dir="auto"><span class="autocomment">側方開孔量壓力差</span></span></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 10:21 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l33" >行 33：</td> <td colspan="2" class="diff-lineno">行 33：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (A&lt;sub&gt;1&lt;/sub&gt;&lt;<del class="diffchange diffchange-inline">sub</del>&gt;2&lt;/<del class="diffchange diffchange-inline">sub</del>&gt;/A&lt;sub&gt;2&lt;/sub&gt;&lt;<del class="diffchange diffchange-inline">sub</del>&gt;2&lt;/<del class="diffchange diffchange-inline">sub</del>&gt; − 1)v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (A&lt;sub&gt;1&lt;/sub&gt;&lt;<ins class="diffchange diffchange-inline">sup</ins>&gt;2&lt;/<ins class="diffchange diffchange-inline">sup</ins>&gt;/A&lt;sub&gt;2&lt;/sub&gt;&lt;<ins class="diffchange diffchange-inline">sup</ins>&gt;2&lt;/<ins class="diffchange diffchange-inline">sup</ins>&gt; − 1)v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;</div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3784:rev-3785 --> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3784&oldid=prev 丁志仁：/* 側方開孔量壓力差 */ 2020-12-20T10:20:01Z <p><span dir="auto"><span class="autocomment">側方開孔量壓力差</span></span></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 10:20 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l33" >行 33：</td> <td colspan="2" class="diff-lineno">行 33：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (A&lt;sub&gt;1&lt;/sub&gt;&lt;sub&gt;2&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;&lt;sub&gt;2&lt;/sub&gt; − 1)v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;</ins></div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3783:rev-3784 --> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3783&oldid=prev 丁志仁：/* 側方開孔量壓力差 */ 2020-12-20T10:17:10Z <p><span dir="auto"><span class="autocomment">側方開孔量壓力差</span></span></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 10:17 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l32" >行 32：</td> <td colspan="2" class="diff-lineno">行 32：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#沒有高度差的白努利公式</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#沒有高度差的白努利公式</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">:v&lt;sub&gt;2&lt;/sub&gt; = (A&lt;sub&gt;1&lt;/sub&gt;/A&lt;sub&gt;2&lt;/sub&gt;)v&lt;sub&gt;1&lt;/sub&gt;</ins></div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3782:rev-3783 --> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3782&oldid=prev 丁志仁 於 2020年12月20日 (日) 10:14 2020-12-20T10:14:36Z <p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 10:14 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l30" >行 30：</td> <td colspan="2" class="diff-lineno">行 30：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;div style=&#039;float:right&#039;&gt;&lt;img src=&#039;https://upload.wikimedia.org/wikipedia/commons/4/4b/Venturi5.svg&#039; width=400 height=*/&gt;&lt;/div&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;div style=&#039;float:right&#039;&gt;&lt;img src=&#039;https://upload.wikimedia.org/wikipedia/commons/4/4b/Venturi5.svg&#039; width=400 height=*/&gt;&lt;/div&gt;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (v&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;)</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (v&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;)</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">#沒有高度差的白努利公式</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">#A&lt;sub&gt;1&lt;/sub&gt;‧s&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧s&lt;sub&gt;2&lt;/sub&gt; 各項同除以時間 t 得 A&lt;sub&gt;1&lt;/sub&gt;‧v&lt;sub&gt;1&lt;/sub&gt; = A&lt;sub&gt;2&lt;/sub&gt;‧v&lt;sub&gt;2&lt;/sub&gt;</ins></div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3781:rev-3782 --> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3781&oldid=prev 丁志仁：/* 側方開孔量壓力差 */ 2020-12-20T10:06:29Z <p><span dir="auto"><span class="autocomment">側方開孔量壓力差</span></span></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 10:06 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l29" >行 29：</td> <td colspan="2" class="diff-lineno">行 29：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===側方開孔量壓力差===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===側方開孔量壓力差===</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;div style=&#039;float:right&#039;&gt;&lt;img src=&#039;https://upload.wikimedia.org/wikipedia/commons/4/4b/Venturi5.svg&#039; width=400 height=*/&gt;&lt;/div&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;div style=&#039;float:right&#039;&gt;&lt;img src=&#039;https://upload.wikimedia.org/wikipedia/commons/4/4b/Venturi5.svg&#039; width=400 height=*/&gt;&lt;/div&gt;</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ(v&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;)</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ (v&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;)</div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3780:rev-3781 --> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3780&oldid=prev 丁志仁 於 2020年12月20日 (日) 10:05 2020-12-20T10:05:49Z <p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 10:05 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l26" >行 26：</td> <td colspan="2" class="diff-lineno">行 26：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:&lt;i&gt;p ＋ ½ρv&lt;sup&gt;2&lt;/sup&gt; ＋ ρgh&lt;/i&gt; = 常數</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:&lt;i&gt;p ＋ ½ρv&lt;sup&gt;2&lt;/sup&gt; ＋ ρgh&lt;/i&gt; = 常數</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:其中 p 代表做功，½ ρv&lt;sup&gt;2&lt;/sup&gt; 代表動能， ρgh 代表位能。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:其中 p 代表做功，½ ρv&lt;sup&gt;2&lt;/sup&gt; 代表動能， ρgh 代表位能。</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">===側方開孔量壓力差===</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">&lt;div style=&#039;float:right&#039;&gt;&lt;img src=&#039;https://upload.wikimedia.org/wikipedia/commons/4/4b/Venturi5.svg&#039; width=400 height=*/&gt;&lt;/div&gt;</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">p&lt;sub&gt;1&lt;/sub&gt; − p&lt;sub&gt;2&lt;/sub&gt; = ½ρ(v&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; − v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt;)</ins></div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3779:rev-3780 --> </table> 丁志仁 http://nice-learning.net/nlWiki/index.php?title=%E7%99%BD%E5%8A%AA%E5%88%A9%E5%AE%9A%E5%BE%8B&diff=3779&oldid=prev 丁志仁 於 2020年12月20日 (日) 09:45 2020-12-20T09:45:29Z <p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hant-TW"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">←上個修訂</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">於 2020年12月20日 (日) 09:45 的修訂</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l23" >行 23：</td> <td colspan="2" class="diff-lineno">行 23：</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:= p▽ ＋ ½ ρ▽v&lt;sup&gt;2&lt;/sup&gt; ＋ ρ▽gh</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:= p▽ ＋ ½ ρ▽v&lt;sup&gt;2&lt;/sup&gt; ＋ ρ▽gh</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:p&lt;sub&gt;1&lt;/sub&gt;▽&lt;sub&gt;1&lt;/sub&gt; ＋ ½ ρ&lt;sub&gt;1&lt;/sub&gt;▽&lt;sub&gt;1&lt;/sub&gt;v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; ＋ ρ&lt;sub&gt;1&lt;/sub&gt;▽&lt;sub&gt;1&lt;/sub&gt;gh&lt;sub&gt;1&lt;/sub&gt; = p&lt;sub&gt;2&lt;/sub&gt;▽&lt;sub&gt;2&lt;/sub&gt; ＋ ½ ρ&lt;sub&gt;2&lt;/sub&gt;▽&lt;sub&gt;2&lt;/sub&gt;v&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; ＋ ρ&lt;sub&gt;2&lt;/sub&gt;▽&lt;sub&gt;2&lt;/sub&gt;gh&lt;sub&gt;2&lt;/sub&gt;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:p&lt;sub&gt;1&lt;/sub&gt;▽&lt;sub&gt;1&lt;/sub&gt; ＋ ½ ρ&lt;sub&gt;1&lt;/sub&gt;▽&lt;sub&gt;1&lt;/sub&gt;v&lt;sub&gt;1&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; ＋ ρ&lt;sub&gt;1&lt;/sub&gt;▽&lt;sub&gt;1&lt;/sub&gt;gh&lt;sub&gt;1&lt;/sub&gt; = p&lt;sub&gt;2&lt;/sub&gt;▽&lt;sub&gt;2&lt;/sub&gt; ＋ ½ ρ&lt;sub&gt;2&lt;/sub&gt;▽&lt;sub&gt;2&lt;/sub&gt;v&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;2&lt;/sup&gt; ＋ ρ&lt;sub&gt;2&lt;/sub&gt;▽&lt;sub&gt;2&lt;/sub&gt;gh&lt;sub&gt;2&lt;/sub&gt;</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>若流體不可壓縮，▽&lt;sub&gt;1&lt;/sub&gt; <del class="diffchange diffchange-inline">＋ </del>▽&lt;sub&gt;2&lt;/sub&gt; = ▽ ，ρ&lt;sub&gt;1&lt;/sub&gt; <del class="diffchange diffchange-inline">＋ </del>ρ&lt;sub&gt;2&lt;/sub&gt; = ρ ，各項約去 ▽ ：</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>若流體不可壓縮，▽&lt;sub&gt;1&lt;/sub&gt; <ins class="diffchange diffchange-inline">= </ins>▽&lt;sub&gt;2&lt;/sub&gt; = ▽ ，ρ&lt;sub&gt;1&lt;/sub&gt; <ins class="diffchange diffchange-inline">= </ins>ρ&lt;sub&gt;2&lt;/sub&gt; = ρ ，各項約去 ▽ ：</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:&lt;i&gt;p ＋ ½ρv&lt;sup&gt;2&lt;/sup&gt; ＋ ρgh&lt;/i&gt; = 常數</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:&lt;i&gt;p ＋ ½ρv&lt;sup&gt;2&lt;/sup&gt; ＋ ρgh&lt;/i&gt; = 常數</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:其中 p 代表做功，½ ρv&lt;sup&gt;2&lt;/sup&gt; 代表動能， ρgh 代表位能。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:其中 p 代表做功，½ ρv&lt;sup&gt;2&lt;/sup&gt; 代表動能， ρgh 代表位能。</div></td></tr> <!-- diff cache key nlWiki-wiki_:diff::1.12:old-3778:rev-3779 --> </table> 丁志仁