Viewing profile — east2west

The Eurofighter Typhoon houses two EJ200 engine with 60 kN (13,500 lbf) of dry thrust and >90 kN (20,230 lbf) with afterburners. I believe there are experimental versions of EJ200 …

I am a big fan of "Matrix Differential Calculus with Applications in Statistics and Econometrics" by Jan R. Magnus, Heinz Neudecker. They are very thorough and rigorous with their …

I think that sentence is confusing but mathematical conclusion still stands. For quadratic forms, we are only concerned with symmetric matrices, or the symmetric part of any real m…

This is the standard line from 50-cents (五毛). US and CCP counts deaths differently. One needs only to compare flu statistics to know they are not comparable. US counts anyone with …

Anyone can look up The Great Leap Forward and official coverup of ZhengZhou flood death this year to know that CCP covering up death is NOT a conspiracy theory.

Augustus' daughter Julia was married to Agrippa and despite their age difference the marriage was a happy one, as far as history remembers. Agrippa was a man of wide ranging cultur…

> Dude, what is this thing? I have no idea what's going on with this "佟丽娅嫁给中宣部副部长,"? You say you are born in China, so presumably you can read Chinese. Then you can head over to [1…

You are spewing lies and half truth. > Life itself is a human right, and probably the most precious one. How can welding front gates shut be protecting human life? How can anyone s…

Do starving its own people and persecuting anyone who talks, thinks out loud, researches, or investigates it, work for you? The Great Leap Forward and the "Three-year Natural Disas…

I really like "Linear Algebra and Its Applications" by Gilbert Strang. It is not a textbook, the style is conversational, and he really tries to help you learn. It is one of rare m…

I believe ROS (Robotic operating system) has good implementations of state estimation algorithms. If you are worried about memory footprint, then Durbin and Koopman ("Time Series A…

The most thorough explanation of Kalman filter as recursive least square coupled with linear state-space models is "Linear Estimation" by Thomas Kailath, Ali H. Sayed, Babak Hassib…

I just tried your biology blog post generator and the second paragraph of the generated text, also the second sentence, is "Transcription is the process of converting audio into te…

Perhaps you are referring to modern nonstandard analysis, which I am sure has equivalent definition of limits. I will note that in standard calculus Epsilon-Delta is not only used …

The modern approach to calculus using limits do not use infinitesimals. According to Richard Courant, "Mathematicians of first rank operated ... sometimes even with mystical associ…

Could you provide some examples of recent numerical linear algebra inspired by machine learning? The only numerical linear algebra related to machine learning, in particular deep l…

I recall that the group that created Spark had a bioinformatics project on Spark but I don't know what happened to it. All I could find now is a paper[1] hosted by databricks. [1] …

If it is Chinese companies, then presumably a lot of those devices are in China as well. Wondering whether they might be used to bring down the Great FireWall of China. At least an…

Inside Julia compiler/runtime there is an interpreter, because Julia uses a heuristic to determine whether to compile or interpret a function. There is also interpreter code in Jul…

I don't miss OOP in Julia but I do feel there need to be more ways to abstract things than multiple dispatch and structs. One thing I do miss is interfaces, which can group functio…

Exactly, numerical errors could easily have accounted for the difference between already tiny p-values. The point isn't that the smaller p-value isn't better than the bigger one, i…

Already reached the conclusion when I saw a genetic researcher presenting his p-value < 10^-40 as better than < 10^-10. I kept my mouth shut because I didn't want to ruin the poor …

"on a backcountry trip in the desert ... strap on extra gallons of fuel" -- Since you are going into a desert, would a portable solar charger work in place of extra fuel? The downs…