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Janet Jackson's 1989 Hit 'Rhythm Nation' May Literally Crash Laptops, Microsoft Says_我的网站

绝命毒师第五季

A | The 1989 song "Rhythm Nation" by Janet Jackson has a funky/new jack swing-ish beat that encourages dancing, but it also has a special frequency that can cause some laptops, fortunately from the bygone era of Windows XP, to crash, Microsoft developer Raymond Chen said.,Chen, the chief software engineer at Microsoft, reported the problem on his blog The Old New Thing this week. He claimed that the song's frequency coincided with the laptop hard drive's resonant frequency, which is an object's inherent frequency.,The way a glass breaks when exposed to certain noises is similar to how a laptop crashes, Chen asserted, as the sound from the source sends an unseen vibration through the air and onto the glass.,"A colleague of mine shared a story from Windows XP product support. A major computer manufacturer discovered that playing the music video for Janet Jackson's 'Rhythm Nation' would crash certain models of laptops," Chen wrote. "I would not have wanted to be in the laboratory that they must have set up to investigate this problem. Not an artistic judgment.",According to Chen, the manufacturer discovered that Jackson's song also crashed laptops built by its rivals.,"Playing the music video on one laptop caused a laptop sitting nearby to crash, even though that other laptop wasn't playing the video," he said. "It turns out that the song contained one of the natural resonant frequencies for the model of 5400 rpm laptop hard drives that they and other manufacturers used.",Then, manufacturers included a "custom filter in the audio pipeline that detected and removed the offending frequencies during audio playback," and this fixed the problem. Chen added that they likely attached a digital version of a "Do Not Remove" sticker on that audio filter.,However, he expressed some concern that, after adding the workaround many years ago, nobody would remember its purpose.,"Hopefully, their laptops are not still carrying this audio filter to protect against damage to a model of hard drive they are no longer using," Chen concluded.,Chen did not say what kind of sounds caused such a resonance. But that apparently does not matter now, given the transition of laptops and desktop computers to SSDs.,In addition, Chen attached to the post an old educational video from the data center, which demonstrates the effect of sound wave vibrations, namely human screams, on the operation of hard drives in a rack.,By and large, resonance is a physical phenomenon in which the frequency of one object's sound waves and those of another object coincide. This may result in a sharp rise in amplitude. This is why some bridges have previously collapsed.。

B | K图 688836_0 K图 002714_0 　　近日，某经济学者“宇树研发经费低于牧原”的言论近日引发热议。明星人形机器人企业与传统养殖龙头的研发金额对比，自带强烈的反差传播效应，也戳中了市场对硬科技企业 “含金量” 的疑问。
　　从绝对金额看，该表述并非虚言。宇树科技招股书显示，2023至2025年公司累计研发投入2.65亿元，其中2025年研发费用1.45亿元；牧原股份2025年年报披露，当年研发费用达16.48亿元，单年规模是宇树的11.4倍。　　但换以研发费用率衡量，结论则完全反转：2025年宇树研发费用率为8.53%，牧原仅为1.14%，前者研发强度是后者的7.5倍。两家公司均采用研发全额费用化的会计处理，口径具备可比性，差异的核心源于营收规模的天壤之别—— 牧原2025年营收1441亿元，是宇树的 85倍。　　这种研发费用绝对值对比的本质，是用成熟周期企业的标尺衡量新兴成长企业，本身就存在产业发展阶段的错配。　　牧原所处的生猪养殖是成熟的产业赛道，行业增速长期维持个位数，企业增长依赖市占率提升与精细化成本管控。其研发属于典型的精益防守型：投向种猪育种、营养配方、疫病防控、智能环控等领域，核心目标是边际降本、巩固成本壁垒，投入产出周期短且可量化，16 亿元研发对应的是千万级出栏量的效率优化，是成熟制造业的标配动作。　　宇树则身处全球渗透率不足 1% 的人形机器人赛道，产业仍处于从 0 到 1 的萌芽阶段。

C | 其研发属于前沿探索型：聚焦运动控制算法、高性能关节、具身智能系统等底层技术，目标是定义产品标准、开辟全新应用场景，技术回报周期长且不确定性高。

D | 　　资本市场给予宇树高估值，定价的是未来万亿市场的增长期权，而非当下的营收与利润。用成熟企业的研发绝对值评判新兴科技公司，类似于用成熟车企的研发预算对比初创电动车企，数字可比但商业含义完全不同。　　真正值得市场关注的，从来不是 “研发有没有养猪多”，而是宇树研发投入的效率与长期可持续性。一方面，三年累计 2.65 亿元的研发投入，便实现了四足机器人到人形机器人的产品跨越，并率先完成规模化盈利，这一效率在全球同赛道普遍大额亏损的背景下格外突出。其 “小步快跑、营收反哺研发” 的务实路线，也是中国硬科技企业的典型成长路径。

E | 　　另一方面，研发费用率的快速下滑值得警惕。从 2023 年的 31.4% 降至 2024 年的 17.8%，再到 2025 年的 8.53%，研发增速远低于营收增速。当前人形机器人技术路线远未定型，核心部件、算法迭代仍在快速演进，若后续投入强度未能跟上行业节奏，短期的产品领先优势未必能转化为长期技术壁垒。　　值得注意的是，宇树此次IPO募资42亿元，其中85%将专项用于研发，最大单笔投向大模型研发的金额达20亿元。过去三年累计研发费用2.65亿元，而IPO后第一笔大模型投入就是这一数字的7倍多。这预示着宇树正在从“硬件公司”向“软硬一体平台”转型，研发投入的量级将发生质变。　　说到底，养猪的研发并不 “低端”，机器人的研发也不天然 “高端”。