Han Liu

13 Flips | 1 Magazine | 2 Likes | 7 Following | 39 Followers | @hanliu1204 | Keep up with Han Liu on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “Han Liu”

10 Scientific Ideas That Scientists Wish You Would Stop Misusing

Many ideas have left the world of science and made their way into everyday language — and unfortunately, they are almost always used incorrectly. We …

Ten Ways Big Data Is Revolutionizing Manufacturing

McKinsey & Company recently published How Big Data Can Improve Manufacturing which provides insightful analysis of how big data and advanced analytics can streamline biopharmaceutical, chemical and discrete manufacturing.<p>The article highlights how manufacturers in process-based industries are using …

7 Things Successful Entrepreneurs Do

Opinions expressed by <i>Entrepreneur</i> contributors are their own.<p>If every entrepreneur thought of himself as a startup founder, there would be a lot more successful startups and a lot fewer failed entrepreneurs.<p>The problem is they don’t.<p>For some reason I can’t understand, many would-be entrepreneurs …

The 7 Attributes of People Who Get Things Done

Opinions expressed by <i>Entrepreneur</i> contributors are their own.<p>Isn’t it amazing that some people you know always seem to be working hard, but never seem to get anything done? As an entrepreneur, you need to avoid partnering with these people, or hiring them at your startup. The challenge is to find …

Maxwell's equations

For thermodynamic relations, see Maxwell relations. For the history of the equations, see History of Maxwell's equations. For a general description …

Group velocity

The <b>group velocity</b> of a wave is the velocity with which the overall shape of the waves' amplitudes—known as the <i>modulation</i> or <i>envelope</i> of the …

Diffeomorphism

In mathematics, a <b>diffeomorphism</b> is an isomorphism of smooth manifolds. It is an invertible function that maps one differentiable manifold to another …

Henri Poincaré

<b>Jules Henri Poincaré</b> (French: [ɑ̃ʁi pwɛ̃kaʁe] ( listen);[2][3] 29 April 1854 – 17 July 1912) was a French mathematician, theoretical physicist, …

Aleksandr Lyapunov

<b>Aleksandr Mikhailovich Lyapunov</b> (Russian: Алекса́ндр Миха́йлович Ляпуно́в, pronounced [ɐlʲɪkˈsandr mʲɪˈxajɫəvʲɪtɕ lʲɪpʊˈnof]; June 6 [O.S. May 25] …

Control system

For other uses, see Control system (disambiguation).<p>A <b>control system</b> manages, commands, directs, or regulates the behavior of other devices or systems …

Control Systems

<i>Control Systems</i> is a featured book on Wikibooks because it contains substantial content, it is well-formatted, and the Wikibooks community has …

Data Science

从历史到明天——《为什么用电频率是50Hz?》续【能源常识】

欢迎转载,但恳请注明来源,若是再把“能源观察网”的二维码加上,那定是极好的!微信公众号中内容均可在“能源观察网”网站中找到原文,www.chinaero.com.cn。<p>~~~~~~~~~华丽丽的分割线~~~~~~~~~<p><b>【2014年第46期】能源政乾方 之能源常识专题</b><p>(小编注:之前《为什么用电频率是50Hz?》一文只解释了为什么频率不能太高或太低,并没有说明为什么一定要50Hz或60Hz,有读者还问过小编此事。其实小编不是不想解释,而是才疏学浅,无法解释。<b>此篇《从历史到明天》为聊东一叟的读者来信</b>,有的放矢地精准回答了为什么是50Hz或60Hz的问题,读后深受裨益,刊登此稿,以飨读者。回复“50H …