east2west

5 ms·

1.
by east2west 3y ago
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 with >100 kN thrust but since Typhoon is being retired
2.
by east2west 3y ago
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 exposition and proofs, which demands a degree of
3.
by east2west 4y ago
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 matrix, because we can always replace any square matrix in a
4.
by east2west 4y ago
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 virus at the time of death while CCP releases no data and on
5.
by east2west 4y ago
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.
6.
by east2west 4y ago
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 culture and abilities and Julia was a vivacious leader of the
7.
Lessons from LLVM: An SC21 Fireside Chat with Chris Lattner(hpcwire.com)
2 points by east2west 5y ago|0 comments
8.
by east2west 5y ago
> 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] and read all about oversea Chinese makin
9.
by east2west 5y ago
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 survive after being cut off from food, medicine, supplies,
10.
by east2west 5y ago
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 Disaster!" There was nothing natural about it and we st
11.
by east2west 5y ago
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 math books that includes reason, context, applicati
12.
by east2west 5y ago
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 Analysis by State Space Methods") has a scalar vers
13.
by east2west 5y ago
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 Hassibi. It covers robust numerical algorithms such as
14.
by east2west 5y ago
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 text." Obviously, the generator is confusing audio t
15.
by east2west 5y ago
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 in defining derivatives, but also used in defining function
16.
by east2west 5y ago
The modern approach to calculus using limits do not use infinitesimals. According to Richard Courant, "Mathematicians of first rank operated ... sometimes even with mystical associations as in references to 'infinitesimals' o
17.
by east2west 5y ago
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 learning, is matrix multiplication due to convolution. I am c
18.
by east2west 5y ago
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] https://databricks.com/wp-content/u
19.
by east2west 5y ago
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 any attempt might force the Chinese government to crack down o
20.
Cooking with a Dash of Science(nytimes.com)
2 points by east2west 5y ago|0 comments
21.
by east2west 5y ago
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 Julia debugger. I don't know how full featured they a
22.
by east2west 5y ago
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 functions for a common purpose. I understand it may be not fea
23.
by east2west 5y ago
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, it is, but that small significance should have been
24.
by east2west 5y ago
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 guy's moment in the sun, but I knew it was t
25.
by east2west 5y ago
"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 downsize is that it is only usable in daylight and it m
26.
by east2west 5y ago
I agree with most of what you said and share your frustration with the tooling of Julia. However, I am not sure how well I would expect a static checker to work for Julia. Julia after all is a dynamical language, and while you may disagree
27.
by east2west 5y ago
Ever since introduction of potato to China large scale famines disappeared in China except for those caused by war, and by army and government seizing foods. Those modern famines are notable for their scale, duration, and entirely man-made
28.
Despite Chip Shortage, Chip Innovation Is Booming(nytimes.com)
1 points by east2west 5y ago|1 comments
29.
by east2west 5y ago
In Rust you can write ```f: fn(i32) -> i32```. Ocaml's syntax is more consistent, I agree, but its colon operator has different precedence than in Rust, so I am not sure its rational applies to Rust.
30.
by east2west 5y ago
Believe it or not, TSMC owns and operates a fab in Mainland China, a 28nm one. So I imagine it posts quite a bit of job posting in China. It has recently applied for fab expansion in China, asking for some of that sweet, sweet free money CC

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