欧洲联盟 2021-12-30 17:25:32
在天文学中，有一个N体问题：一个星系内的各个天体，在引力作用下，是如何运动的？两个天体的相对运动是容易确定的：把牛顿的万有引力定律代入到牛顿第二定律中，解一个矢量微分方程，用上角动量守恒定律，椭圆轨道立刻展现在眼前。开普勒...
[ 阅读全文 ]马丁可1 2021-12-29 17:30:43
Dagger GT is based on the Cheetah concept car. The multi-fuel twin-turbo engine has a maximum power of 1491 kW and a maximum torque of 2710 N·m. At the same time, the top speed of Dagger GT has reached 483 km/h. T...
[ 阅读全文 ]访谈：SpaceX, Mars, Tesla Autopilot, Self-Driving, Robotics, and AI
蓝调 2021-12-28 23:19:00
Lex Fridman第三次采访Elon Musk。 Elon Musk: SpaceX, Mars, Tesla Autopilot, Self-Driving, Robotics, and AI | Lex Fridman Podcast#252 https://www.youtube.com/watch?v=DxREm3s1scA &...
[ 阅读全文 ]Alphabet was the top Big Tech stock of the year
蓝调 2021-12-28 21:05:03
KEY POINTS Alphabet’s stock has rallied almost 70% this year, lifting the company’s market cap to close to $2 trillion. It’s by far the best performance among any of the Big Tech stocks and is this larg...
[ 阅读全文 ]BeijingGirl1 2021-12-27 07:02:45
孟晚舟归国经过隔离后终于回到华为。吃瓜群众的兴趣已经转向。进入年底，华为任老总宣布成立“军团”，近日内部发文，正式成立数据中心能源军团、智能光伏军团、海关和港口军团、智慧公路军团。 任正非这位退伍军人， 把军队管...
[ 阅读全文 ]2021-22 Tesla Model Y qualifies for a TOP SAFETY PICK+ award
蓝调 2021-12-26 21:10:27
The 2021-22 Tesla Model Y, a midsize luxury SUV, qualifies for a TOP SAFETY PICK+ award from the Insurance Institute for Highway Safety. https://www.iihs.org/news/detail/2021-22-tesla-model-y-earns-highest-i...
[ 阅读全文 ]心神不宁 2021-12-26 16:34:56
書香音樂 世紀典藏 【專輯名稱】: 聽雨 - 詩情禪意 ☆ Listen To The Rain 《書香音樂系列（十）》 【專輯藝人】: ◎ 音樂總監：王俊雄 ◎ 製作人：奕睆、周志宏 ◎ 作曲：奕睆、Mickey H. ◎ 演唱：滿書雯 ◎ 大提琴：...
[ 阅读全文 ]欧洲联盟 2021-12-25 21:10:20
力学研究物体的运动方式以及原因。运动指的是空间位置的改变，物体本身没有变形或者变质。为了描述其运动，我们首先需要一个位置函数r(t)，与时刻t有关，还与空间的维度有关。人类能够看见的空间，只有三维及以下的二维、一维（位置点是零...
[ 阅读全文 ]TikTok tops Google as the most visited website on the internet
蓝调 2021-12-25 14:49:13
摘几段：In an analysis of web traffic this year, storage software company Cloudflare found that TikTok was the most visited website and most widely used social media platform. Cloudflare's ranking is based ...
[ 阅读全文 ]菲儿天地 2021-12-29 07:25:05
疫情爆发后，由于跨国旅行非常不便，而从美国去墨西哥又相对容易，所以到墨西哥度假的人数直线上升。全包的All inclusive一揽子工程，吃喝玩乐都包括在房费内（SPA，自助游，儿童看护等不包括在...
[ 阅读全文 ]Tesla Model 3 SR+ LFP cold weather testing
蓝调 2021-12-28 21:06:25
Tesla Model 3 SR+ LFP cold weather testingNov 23, 2021
[ 阅读全文 ]蓝调 2021-12-28 21:03:38
SpaceX in 2021: Elon Musk's space company set records for reusability and moreSpaceX is just months away from its 20th anniversary of founding in 2002 and it's headed into a new year in a stronger position ...
[ 阅读全文 ]菲儿天地 2021-12-27 07:01:05
时间过的好快，12月份给自己的博客放了几天假，又出去度假了两个星期，转眼间就到了年末。女儿的公司比我们多放了一个星期的假，还和小朋友在外面混呢，我们则不得不先撤了。出去久了还是挺想家的，特别是最近飞得有点勤，一路飞行半夜到...
[ 阅读全文 ]5W40 2021-12-26 15:30:02
两种最常见的菜车轮毂紧固模式： 1：螺帽型，一般日系车、美系车基本上都用这种形式的轮毂螺丝。使用这种螺帽的车型，螺杆是在车子的轴头法兰盘上的。拆轮毂的时候，我们只需把螺帽旋出即可。安装轮毂的时候也相对方便快捷。 2...
[ 阅读全文 ]Larry Summers Gets His ‘Told You So’ Moment on Inflation
蓝调 2021-12-25 14:50:55
The Harvard professor, former Treasury secretary and paid Bloomberg contributor rained on everyone’s parade last spring by warning that the U.S. government’s generous bailout payments might spawn ...
[ 阅读全文 ]Covid tests ：where you might still find them for free
蓝调 2021-12-25 14:45:37
Covid tests are in short supply — here’s where you might still find them for freehttps://www.cnbc.com/2021/12/23/where-to-find-free-covid-tests-including-at-home-while-demand-is-up.html
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