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F1赛车上的“栏杆”是干嘛用的?有什么讲究? | 果壳网移动版

这些“栏杆”其实是一系列气流感应器(Aero Mapping)通过测得气流的速度、角度、压强甚至温度,来得知测量区域气流的情况。每一个监测点都是一根朝前或者其他特定方向的测量管。<p>这种测量管叫基尔探针(Kiel Probe),本质上是一种空速管。<p>其原理与皮托管(Pitot Tube)一样。<p>皮托管工作原理,迎风管口是测试取样口,管侧面的开口处的气压作为参考值。通过测量右边液柱的高度差算出流速、气压等数据<p>由于F1是一种对气流非常敏感的赛车,空气动力学性能至关重要。车身在设计时虽然会用计算机模拟优化空气动力学性能,但是气流实在是个太复杂的东西——计算机只能求得它的近似解。 甚至风洞测试对于F1来说都有 …

Machine Learning: An In-Depth Guide — Data Selection, Preparation, and Modeling

Originally published at innoarchitech.com here on February 8, 2016.<p>Articles in This Series<p>Overview, goals, learning types, and algorithms<br>• Data …

「深度」硅谷的过去与现在:了解过去才能创造未来 | 雷锋网

“如果你不了解过去,就无法理解现在。”<p>这是史蒂夫·乔布斯的话。年轻时,他花费了大量时间与Robert Noyce、Andy Grove以及Regis McKenna等老一代硅谷企业家相处。<p>2003年5月,硅谷历史学家Leslie Berlin采访乔布斯时问他,是不是站在先贤们的肩膀上还不够?为什么他 …

9 Year Old Boy Gives The Best Answer Ever On The Meaning Of Life & The Universe

‘<b>‘What the meaning of life is what you make it”</b><p>This little Philosopher tackles the biggest questions: Why are we on Earth? What’s our place in the …

Universe

Fortune.com

• 1. To license Fortune articles, excerpts, or headlines for republication in various media (including books, eBooks, film, web, newsletters, …

雷军做天使的“极简”,要如何在老人机市场推行小米模式?

一,对自身品牌溢价<br>代表车队:法拉利,梅赛德斯,路特斯,卡特汉姆,迈凯轮<p>汽车制造商对于能够制造一辆在赛车场上叱诧风云的赛车是会对品牌产生溢价,通俗地讲是增加情怀。没错就是情怀。法拉利在F1的光辉历史使得很多人都对法拉利另眼相看,法拉利顺理成章的出一些贵的离谱的纪念版,并把普通车的售价提高。<br>像卡特汉姆这样的小汽车厂,也很大程度上增加了品牌价值和品牌认可度。迈凯轮则一步步借着在F1中的影响力推出P1这等与辣法918抢饭碗的顶尖豪车。<br>如果整天在电视上“今年过节不收礼”,对于多数豪车品牌是不利的,大家总不会对可口可乐有对法拉利的情怀那么深吧?<br>他们卖的贵,一方面产品好,另一方面就是情怀的价值。<p>二,广告牌<br>代 …

Using Neural Networks to fit equations in R - Benjamin Tovar Data Scientist

Introduction<p>Quoting Wikipedia:<p>“In machine learning and cognitive science, artificial neural networks (ANNs) are a family of statistical learning …

Application to Markov Chains

<b>Application to Markov Chains</b><p><b>Introduction</b> Suppose there is a physical or mathematical system that has <i>n</i> possible states and at any one time, the system …

Algorithms

Five Reasons Why Silicon Valley Won't Partner With The Pentagon

Last week, Secretary of Defense Ashton Carter visited Silicon Valley in pursuit of closer ties with America’s premier center of technological innovation. Carter told executives at Facebook and other tech companies that the Pentagon wants to fashion a partnership enabling the military to leverage …

Silicon Valley