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 across Europe and no oversea sales, we won't see Typhoon armed with them.
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 mathematical maturity on their readers. If you are comfortable with multivariate calculus (at the level of mathematical analysis for some materials) and linear algebra, then this book will teach you matrix calculus well.
On the other hand, if you are already familiar with calculus and linear algebra, then most of materials are just straightforward derivations using theorems you already know, so you might not need a textbook. I liked this textbook because it took mysteries out of formulas I was taught but never told about derivations, and because it was actually a quick read.
There are some limitations though. The book stops at Hessian matrices and matrix derivatives of vectors or something like that, because chain rules start breaking down and one needs multilinear algebra for higher order derivatives. However, for deep learning you don't need to worry about it. The book will teach you enough to derive the gradient of convolution as realized in matrix products.
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 quadratic form, x^T A x, by x^T (A + A^T)/2 x, the symmetric part of the matrix, and the quadratic form still retains the original value. Then, for symmetric matrices, their eigenvalues being positive implies that the matrices are positive definite. Symmetric square matrices have real eigenvalues; one can prove this by taking the complement of quadratic forms.
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 rare occasion they publish statistics, the numbers are several orders of magnitude lower than US numbers.
I am not using any standard lines, I am an internet commentator from the US.
If China were lying about it's numbers, it would be obvious from antibody tests of people traveling from China. It is clear that they are not undercounting deaths by millions.
if a person has a heart problem. In the US it would be something like. “Died of heart problem bought on by covid”. Or “died of covid due to complications caused by heart problem”.
So covid is a causing or contributing factor.
In China. It’s recorded as “heart problem”.
We know this because they do it with seasonal flu. America gets like 20m cases of seasonal flu a year. And like 30k deaths. China gets like 50 cases.
China said that if someone has covid in the family. That’s counted as 1, even if the whole family/household has it. And back in 2020 they leaked a document saying if someone tests positive but doesn’t show symptoms then it’s not recorded as a covid case.
Not to the tune of millions of lives. Nobody who is studying this thinks that China had millions of covid deaths and managed to hide them.
Claims to the contrary are fringe conspiracy theories. The "lab leak" hypothesis is way more probable than the idea that they have hidden 3 million deaths and the associated covid spread... It's just not possible.
> If someone dies after contracting COVID-19 but had, for example, cancer, heart disease or diabetes at the time, Chinese hospitals would not classify the death as resulting from COVID-19, but the chronic illness instead, said Jin Dong-yan (金冬雁), a virologist at Hong Kong University.
> The country has recorded a mere two deaths from more than 443,000 cases since March 1, both of which occurred in Jilin – a province bordering North Korea. Yet, according to a report, several people directly informed the Finanical Times directly that their relatives in Shanghai had passed away after contracting the disease.
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 culture and abilities and Julia was a vivacious leader of the cultured noble Romans. She also understood that messing with royal progeny is treason in monarchy, so when she was asked why her two sons both looked like Agrippa when she was widely suspected of adultery, she answered that she never took on passengers unless her cart was full.
Julia was banished later when she was married to Tiberius, the second emperor, by Augustus because Julia abandoned all pretense and Tiberius was a hard soldier and able administrator but lacked the refined tact and cultured grace of Agrippa. Tiberius' familial tragedy contributed to his isolation and insane persecution in the last years of his reign.
> Tiberius' familial tragedy contributed to his isolation and insane persecution in the last years of his reign.
Specifically Augustus forced Tiberius to divorce his wife, whom he loved, and commanded him to marry Julia. Suetonius hints that this led to Tiberius' descent into depravity.
> 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, contact, income? Don't pretend zero-tolerance policy is about protecting people, it is to protect Xi JingPing who has staked his personal political standing on the zero tolerance policy[1].
Some regions have been under continual lock-down for the better part of this year. Do you know how many people have died from lock-down? Does anyone know? Does CCP permit anyone to count? For that matter, how many people died in Wuhan two years ago? Why is CCP killing a citizen journalist for writing about Wuhan outbreak[2]? Is her life not human?
>VPNs are legal in China. You just need to be technically-sophisticated enough to find the correct VPNs, and make sure it falls in the boundary of Chinese law.
Pray tell which VPNs are legal in China? Which one can I use to visit HN legally in China? What is stopping an enterprising person to make your "correct" VPNs user friendly to the mass? I will you, because it does not exist!
> I have several wechat groups discussing serious political issues in China.
Why don't you post to your WeChat groups "佟丽娅嫁给中宣部副部长," reputed marriage of an actress to the vice minister of Propaganda Ministry and take a screenshot? You cannot even search it in Baidu, and you have the gall to say the Internet in China is constantly watched.
> Why don't you post to your WeChat groups "佟丽娅嫁给中宣部副部长," reputed marriage of an actress to the vice minister of Propaganda Ministry and take a screenshot? You cannot even search it in Baidu, and you have the gall to say the Internet in China is constantly watched.
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,"?
> 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 making fun of CCP censoring salacious rumors about an actress and vice minister of Propaganda. The most powerful police apparatus and most sprawling internet censorship machinery working in overdrive to suppress tabloid, not because the rumor may or may not be false but because the Party knows the people believe it true in their heart.
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 still don't know how many perished.
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, application, and history without sacrificing rigor. The book also focuses on numerical algorithms aspects more than some popular textbooks, which may be helpful to understanding Kalman filter.
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 version of squared-root Kalman filter (it ingests one number at a time rather a whole vector at a time). You may have to implement it yourself though.
