咸鱼的世界


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两种每日黑巧的成分比例不一样,下面那种便利店卖的好吃一些


BYD灵车库?


Репост из: 煎蛋无聊图


CRIU工具好神奇




OPPO显微镜好玩


Репост из: Phoronix News
Phoronix
Initial Support For The Rust Language Lands In Linux-Next

For a long while now Linux kernel developers have discusses the prospects of optionally allowing the Rust language to be used for new device drivers within the Linux kernel areas and other areas within the kernel for this language that prides itself on safety and performance. As the first baby step towards that dream, initial Rust support appeared this week in the Linux-Next tree...


买了个微距镜头玩


Репост из: Phoronix News
Phoronix
Researchers Discover Intel CPU Ring Interconnects Vulnerable To Side Channel Attack

University of Illinois researchers have discovered that Intel's CPU ring interconnects are vulnerable to exploit by side-channel attacks. This opens a whole new can of worms with the cross-core interconnect now being vulnerable to exploit but so far Intel doesn't appear to be overly concerned and there are some open questions on whether this interconnect exploit would still work with the latest Intel Xeon processors...


2019起实行的新国际单位制,不再依赖人造基准,完全由自然规律来定义。光速、普朗克常数、电子电量等常数全部变成人为规定的精确值。




打错了,贝尔表示常用对数(log10)。自然对数(ln)的单位叫奈培。


原来dB的意思是deci-bell,即十分之一贝尔。贝尔表示自然对数。记住这个就不会想不起 1W 等于多少 dBmW 了




冷知识:长度单位m的定义来自钟摆。人们先把1s确定为了一天的1/86400,然后校准摆钟,让它1s摆一下,这时的摆长就定义为了1m。这样根据单摆公式,重力加速度g自然就成了π²约等于9.86。当然后来这些单位重新定义了,数值有了变化,不过差的也不多。


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快速车如何不撞上普通车,有独立轨道吗


新建成的交通枢纽、购物中心、写字楼缝合怪

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