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Chemical Engineer / MBA / Data Scientist

Notes from Industry

How can multi-armed bandits can help a startup

We all have seen lots of articles where Reinforcement Learning (RL) agents have been used to cross frozen lakes, climb mountains, choosing the best routes for a cab in a city, etc. Games present a significant challenge to real-life agents since they require us to make several decisions. Normally, we must optimize these decisions in order to improve our overall score (or not to fall down a hole in the frozen lake, otherwise we can get troubles). Games also show how the math behind agents works in a beautiful way. …


Getting qualitative insights from hidden layers

Nature is an infinite sphere whose center is everywhere and whose circumference is nowhere.

B. Pascal

For some years, black box machine learning has been criticised for its limits in extracting knowledge from data. Deep Neural Networks (DNNs) are one of the most well-known of the ‘black box’ algorithms. Deep Neural Networks (DNNs) are the most widely used and successful image classification and processing technique today. But when it comes to structured data (the most common data problem) there is still a controversial about its advantage. …


It is not as complicated as it seems

1. Introduction

When it comes to quantum computing, far too many people envision something far in the future, such as traveling to Mars. However, many organizations and scientists are now devoting their time to bringing quantum mechanics closer to solving everyday problems. I’ve decided to take a tour of the various existing ecosystems and test one or more of them to see in first place, the level of complexity, second, the various ones and their applicability, and third, whether or not it has has sense to go to the qbit to solve ‘classic’ problems.

Something I learned is that you need some…


Thoughts and Theory

Python implementation of a digital twin for a Li-ion battery

In this tutorial, we will show how to create a simple but functional Digital Twin in Python. A Li-ion battery will be our physical asset. This Digital Twin will enable us to analyze and predict battery behavior, and it can be integrated into any virtual asset management workflow.

Virtual systems and digital twins

Digital twins are a critical component of Industry 4.0. Its basic principle is to replicate physical assets in a virtual world in order to model its dynamics. Imagine we have a water pump somewhere in a city’s water pipe network. Water pumps consume energy and release it in the form of water…


An old new approach for post-pandemic boom

Consider the following scenario. You are a military commander who wishes to demonstrate your team’s preparedness for enemy attacks. You divide the group into two teams: the red one and the blue one. The red team are the attackers, and the blue team is the defenders. Members of the red team attack and members of the blue team must defend their position in accordance with their skilled operating procedures. Red team members are free to use any ruse they can think of to accomplish their goal. They question the blue team’s usual assumptions…


It’s not about standing still and becoming safe. If anybody wants to keep creating they have to be about change.”

Miles Davis

I am a great jazz enthusiast. From a very young age I was fascinated by traditional jazz melodies, its vitality and exquisite finesse. Jazz music has been a private passion whereas helped me to sense many other aspects of life and business. English poet and jazz passionate Philip Larkin started writing a monthly jazz review in Daily Telegraph at beginning of 1961. He loved traditional jazz but was after all no expert and would need educating his…


To evolve from today’s economy to a digital economy needs from a grand compromise between strategy and surprise. Trying to develop a methodology it will find itself up against a high degree of uncertainty. During First Industrial Revolution, more efficient and mechanized production meant new factories could meet the growing demand for consumer products. Digital Revolution will not have this effect. It will change the way consumers buy to a more efficient manner trough total customization and use rationalization. Instead supplying one product to millions of consumers we are trying today to supply millions of products to millions of consumers…


‘All you have to do is write one true sentence. Write the truest sentence you know.’

Ernest Hemingway

According Future Food 2050, a publishing initiative from the Institute of Food Technologists (IFT), between 33 and 50% of the food produced for human consumption is wasted every year in the world. So represents 1.3 Billion Metric Tones per year with a monetary value of US$936 billion as reported in 2013 by Food and Agriculture Organization of the United Nations (FAO). Only in USA this wasted food production drinks in 25% of the total country water consumption and 5% of its energy…


What photography can teach us about the digital world

‘Photography is the simultaneous recognition, in a fraction of a second, of the significance of an event as well as of a precise organisation of forms which give that event its proper expression.’

Henri Cartier-Bresson

Photography was invented by some early nineteenth-century artists but was in 1888 when George Eastman introduced the hand-held Kodak camera, making photography easily done. “You press the button, we do the rest” its slogan rang. Photography impacted society being the world’s primary way of revealing itself to us. People started to capture everyday motion and seeing…


This article is the continuation to TOPOLOGICAL DATA ANALISYS -PART 1- (https://javier-marin.medium.com/topological-data-analisys-f8ff5fa0703a). We recommend that the reader read the first section where we introduced some topology concepts and the dataset.

One can’t do mathematics for more than ten minutes without grappling, in some way or other, with the slippery notion of equality.

BarryMazur

Persistent homology

Let’s remember the routine we have introduced in part 1 : We come across a topological space and we need to find its fundamental group. But our data set is an unfamiliar space and it’s too difficult to look at explicit loops and relations. Then we look…

Javier Marin

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