Quora精选：能不能用数学解释“耳机打结"？
Is There Any Mathematical Explanationfor the Entanglement of the Earphones?能不能用数学解释下“为什么耳机老打结”？获得128好评的的回答@Conner Davis There’s paper I can't find at the moment that analyzes the probability of a length of string tangling in your pocket in an hour as a function of its length. They found that a string of 23cm or more will probably form a knot within the first hour.有一篇这样的论文，不过我现在找不到了，它分析了口袋里的绳子在1小时内打结的概率与绳子长度的关系，还提出了一个以绳长为x的函数。他们发现长度为23厘米或者以上的绳子可能在第1个小时内就打结。Your headphones are longer than that and have three ends instead of two, so the probability they will remain untangled for an hour is even lower.你的耳机比23厘米要长，而且总共有3个头，所以它在第1个小时里不打结的概率会更加低。获得1.7k好评的回答@Senia Sheydvasser Back in 1989, Nicholas Pippenger wrote a paper about knots in random walks. What he showed is that if you have a random walk on the 3D lattice, the probability of that walk forming a knot goes to very, very quickly.早在1989年，Nicholas Pippenger就曾写过一篇关于“随机游动中的绳结”的论文。文中写道如果你在一个3D环境中做随机游动，游动中形成绳结的概率将非常大。There has been other work on knots in random walks since then, and the common thread seems to be that knots form much more readily than you think they do. If your earphones are jostling around in your pocket at all, the probability that they will tangle is high.从那以后，陆续出了其他关于“随机游动中的绳结”的著作。普通的线比你想象中更容易打结，容易得多。如果你的耳机线不停地在你的口袋里互相推撞，它们打结的可能性将非常高。 大连华工创新科技股份有限公司拥有全球领先技术、十年品质保证、贴心的售前售后服务，优秀的研发团队，保证客户不同的需求。有意者请登录www.hgcx.cn或致电0411-39525022密封点胶机,胶条发泡机,聚氨酯涂胶机,机柜密封打胶机,双组份淋胶机,板材刷胶机,断桥铝门窗注胶机 涂胶机 机柜点胶机 密封点胶机 机柜密封 机器人涂胶机 胶条发泡机 断桥铝注胶机 穿条发泡 板材刷胶机 汽车涂胶机 全自动点胶机 PU发泡机 密封胶条设备 自动密封 设备视频 机器人自动连续密封条点胶机Website： HGIT Dispensing system dispensing machine for Cabinets CNC PU Seal Pouring Machine Foam sealing gasket machine Injection (Potting) Machine barrier-strip foam technique Customized production solutions Foam sealing machine (FIPFG) Warm Edge Spacer Forming Machine PU foam dispensing machine Glue Dispensing Robot strip feeding PU foam Foam in Place Gasket machine我看不错噢 谢谢楼主！马后炮化工越来越好！ 楼主太厉害了！楼主，I*老*虎*U！我觉得马后炮化工真是个好地方！
这个帖子不回对不起自己！我想我是一天也不能离开马后炮化工。
这东西我收了！谢谢楼主！马后炮化工真好！ {:1110_551:} {:1110_550:} 打不打结不能用数学方法解析的吧，纯粹随机多因素影响事件
这个帖子不回对不起自己！我想我是一天也不能离开马后炮化工。
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