∫ntegrabℓε ∂iﬀerentiαℓs · unorganised notes, code, and writings of random topics

Reading DOM in CEFPython3

February 15, 2018 blog code

Scrapy can’t handle Javascript. Therefore I use PhantomJS in Selenium, via GhostDriver, instead. But this is now marked as deprecated (PhantomJS people disagree). Even if it is not, there are some weakness in Selenium+GhostDriver. Most noticeably is that I have no way to tell if the browser is finish rendering... [more]

A game using Python speech recognition

February 14, 2018 blog code

While trying with the Google AIY voice kit, I developed a math drill game. A nice try, but the result is not as smooth as what I expected. [more]

深思快想瞬間看透事物本質的豐田思考術

稻垣公夫 / 2017

February 4, 2018 book

Toyota 對管理學的貢獻包括看板、改善和 Lean management 這些觀念，最近還有A3報告書。但如何把意念濃縮成 A3 卻不容易，這是思考方法之範籌，Toyota稱之為Zoom in zoom out，即是從具體至抽象之間來回。 [more]

Genovese (2001) Interacting Multiple Model Algorithm for Accurate State Estimation of Maneuvering Targets

February 2, 2018 paper

A very short publication introducing the IMM filter. It describes a system with multiple models, and in each model, there is a state. The model transition is a ergodic Markov chain with probability matrix \(\Pi\), and state transition in each mode is a linear dynamic system. The state transition and... [more]

How to calculate percentile

January 26, 2018 blog math

Think about it for a short while, anyone can see that there is no definitive way to define what is a percentile. What is surprising is how many different ways we can define it. [more]