Progetti
Modifica il progetto TOP: Taxonomies on Protege Web Reasoning
Nome progetto TOP: Taxonomies on Protege Web Reasoning
giu 2017 – presente
Descrizione progetto
Ontology Web Lenguage 2 OWL2
Vedi il progetto TOP: Taxonomies on Protege Web Reasoning Vedi progetto
Modifica il progetto Repositioning Based on Side Effects on Mithril
Nome progetto Repositioning Based on Side Effects on Mithril
mar 2017 – presente
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Modifica il progetto R Glass Analysis
Nome progetto R Glass Analysis
ago 2016 – ago 2016
Descrizione progetto
R Glass Analysis è un progetto di analisi dei dati: il suo scopo è quello di analizzare diversi campioni di vetro (disponibili nel package "Glass" di R Studio), costruendo così un algoritmo capace di classificare i vetri a partire dai loro elementi chimici.
INTRODUCTION TO DATA MINING AND DEEP LEARNINGAndrea Ciccotta
The goal of the course is
provide an overview
on the main techniques
of Data Mining and Deep
Learning. The course has a
practical orientation.
At first they will come
presented the main ones
bookcases for the
data processing
(Pandas, Scikit-Learn).
It will then pass
to use the library
KERAS, an interface of
high level for the
main libraries of
Deep Learning
(TensorFlow, Microsoft
Cognitive Toolkit,
Theano). Finally, they will be
introduced architectures
of Deep Learning
advanced for the
data processing
audio and video and i
PyTorch e framework
TensorFlow.
During classes
will be presented
examples of concrete use.
The problem of measuring “similarity” of objects arises in
many applications, and many domain-specific measures
have been developed.
complementary approach, applicable in any domain
with object-to-object relationships.
“two objects are similar if
they are related to similar objects.” This general similarity
measure, called SimRank, is based on a simple and intuitive
graph-theoretic model.
Bipartite SimRank nei Domini Omogenei
Bipartite SimRank in Homogeneous Domains
Minimax Variation
INTRODUCTION TO DATA MINING AND DEEP LEARNINGAndrea Ciccotta
The goal of the course is
provide an overview
on the main techniques
of Data Mining and Deep
Learning. The course has a
practical orientation.
At first they will come
presented the main ones
bookcases for the
data processing
(Pandas, Scikit-Learn).
It will then pass
to use the library
KERAS, an interface of
high level for the
main libraries of
Deep Learning
(TensorFlow, Microsoft
Cognitive Toolkit,
Theano). Finally, they will be
introduced architectures
of Deep Learning
advanced for the
data processing
audio and video and i
PyTorch e framework
TensorFlow.
During classes
will be presented
examples of concrete use.
The problem of measuring “similarity” of objects arises in
many applications, and many domain-specific measures
have been developed.
complementary approach, applicable in any domain
with object-to-object relationships.
“two objects are similar if
they are related to similar objects.” This general similarity
measure, called SimRank, is based on a simple and intuitive
graph-theoretic model.
Bipartite SimRank nei Domini Omogenei
Bipartite SimRank in Homogeneous Domains
Minimax Variation
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc.
It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
Time Management & Productivity - Best PracticesVit Horky
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
The six step guide to practical project managementMindGenius
The six step guide to practical project management
If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc.
It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
Time Management & Productivity - Best PracticesVit Horky
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
The six step guide to practical project managementMindGenius
The six step guide to practical project management
If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
R Glass Analysis
1. R Glass Analysis - Data Analysis Project
Andrea Ciccotta
Introduzione
R Glass Analysis è un progetto di analisi dei dati: il suo scopo è quello di analizzare diversi campioni di vetro
(disponibili nel package "Glass" di R Studio), costruendo così un algoritmo capace di classificare i vetri a
partire dai loro elementi chimici.
1_GlassAnalysis - kmeans, lda, tree
Inizialmente esploro il dataset e ottengo le informazioni generali dei vetri:
RI Na Mg Al Si K
Min. :1.511 Min. :10.73 Min. :0.000 Min. :0.290 Min. :69.81 Min. :0.0000
1st Qu.:1.517 1st Qu.:12.91 1st Qu.:2.115 1st Qu.:1.190 1st Qu.:72.28 1st Qu.:0.1225
Median :1.518 Median :13.30 Median :3.480 Median :1.360 Median :72.79 Median :0.5550
Mean :1.518 Mean :13.41 Mean :2.685 Mean :1.445 Mean :72.65 Mean :0.4971
3rd Qu.:1.519 3rd Qu.:13.82 3rd Qu.:3.600 3rd Qu.:1.630 3rd Qu.:73.09 3rd Qu.:0.6100
Max. :1.534 Max. :17.38 Max. :4.490 Max. :3.500 Max. :75.41 Max. :6.2100
Ca Ba Fe
Min. : 5.430 Min. :0.000 Min. :0.00000
1st Qu.: 8.240 1st Qu.:0.000 1st Qu.:0.00000
Median : 8.600 Median :0.000 Median :0.00000
Mean : 8.957 Mean :0.175 Mean :0.05701
3rd Qu.: 9.172 3rd Qu.:0.000 3rd Qu.:0.10000
Max. :16.190 Max. :3.150 Max. :0.51000
2. Provo con un primo plot a capire quali elementi sono più o meno presenti nei vari vetri ("dividendo il plot in
2" per maggior chiarezza):
3.
4. In realtà questo non sembra tornare molto utile, provo quindi con un boxplot:
Ecco la prima informazione utile: il silicio è un elemento dominante!
Un altra informazione utile è sicuramente la correlazione tra gli elementi e la loro tipologia nota, utilizzo
quindi rispettivamente i metodi di Pearson e Spearman:
Pearson)
RI -0.1642372146
Na 0.5028980423
Mg -0.7449928875
Al 0.5988292084
Si 0.1515652579
K -0.0100544638
Ca 0.0009522246
Ba 0.5751614590
Fe -0.1882775640
Spearman)
RI -0.21293648
Na 0.39868242
Mg -0.58985414
Al 0.56014833
Si 0.14932051
K -0.23564177
Ca 0.05288838
Ba 0.50686917
Fe -0.15018589
5. Vedo quindi come si addensano i cluster del dataset tra gli elementi che hanno maggiormente attirato la mia
attenzione:
Scelgo quindi i miei criteri per la classificazione, saranno
A1 = RI * Na values ; A2 = Mg * Al values
R1 = Si * K values ; R2 = Ca * Ba values
Con questi criteri voglio classificare i vetri, tramite i discriminanti di
fisher (provo a distinguere le prime tre tipologie, sarà analogo per gli
altri).
Matrici di confusione ottenute:
Utilizzando A1 e A2 per distinugere Type1 e Type2:
analisi_p 1 2
1 25 15
2 45 61
Utilizzando A1 e A2 per distinugere Type2 e Type3:
analisi_p 2 3
2 76 17
3 0 0
Utilizzando A1 e A2 per distinugere Type1 e Type3:
analisi_p 1 2 3
1 70 0 17
2 0 0 0
3 0 0 0
//Analogo per R1 e R2
6. Ecco quindi l'albero decisionale ottenuto:
2_GlassAnalysis - Bayes Naive
Un esempio intuitivo di Bayes Naive è il seguente:
P(Maschio/capelliCorti) = [P(capelliCorti/M) * P(M)] / [P(capelliCorti)]
Posso quindi di certo ragionare nei seguenti termini:
P(Type==1/Mg==4.49) = [P(Mg==4.49/Type==1) * P(Type==1)] / [P(Mg==4.49)]
--->
P(Type==1/Mg~=4.49) = [P(Mg~=4.49/Type==1) * P(Type==1)] / [P(Mg~=4.49)]
P(Type==1) ---> totType1 / totRecord
P(Mg~=4.49) = [N°record( Mg > 4.4 ) U N°record( Mg < 4.6 )] / [N°Tot_record]
Voglio quindi creare un classificatore basato sull'elemento Mg, utilizzando la tecnica Bayes Naive.
[...] Lanciando l'esperimento si può notare come il risultato sia pessimo, dobbiamo
cambiare tecnica!
7. 3_GlassAnalysis - MAP
Studiando i miei dati ho notato come alcune colonne abbiano un'alta differenza in termini di varianza e di
differenza tra gli estremi sup e inf.
Voglio settare manualmente un algoritmo che considerando gli intervalli degli
elementi che maggiormente "godono di questa proprietà", creando così un
classificatore che ragioni nel seguente modo:
"Ha il Magnesio nullo e il Calcio alto? Allora è sicuramente un vetro di tipo X !"
[...]
Scelti quindi gli intervalli ottengo un classificatore stupido poichè soffre
SICURAMENTE di overfitting!
Decido così di aggiungere ai miei intervalli un offset che verrà settato
tramite tecniche di Machine Learning per risolvere il problema dell'overfitting e ottenere un classificatore
migliore.
Lanciando in esecuzione lo script con un basso numero di iterazioni (150) ecco un primissimo risultato:
per type1 classificati 95 su 70
per type2 classificati 59 su 76
per type3 classificati 15 su 17
per type5 classificati 15 su 13
per type6 classificati 7 su 9
per type7 classificati 23 su 29
-0.26 0.92 0.33 0.39
per type1 classificati 77 su 70
per type2 classificati 71 su 76
per type3 classificati 20 su 17
per type5 classificati 16 su 13
per type6 classificati 8 su 9
per type7 classificati 22 su 29
-0.09 0.27 0.24 -0.02
per type1 classificati 79 su 70
per type2 classificati 72 su 76
per type3 classificati 17 su 17
per type5 classificati 16 su 13
per type6 classificati 8 su 9
per type7 classificati 22 su 29
-0.3 0.49 0.17 0.02
per type1 classificati 75 su 70
per type2 classificati 74 su 76
per type3 classificati 19 su 17
per type5 classificati 16 su 13
per type6 classificati 8 su 9
per type7 classificati 22 su 29
-0.21 0.23 0.32 -0.06
per type1 classificati 69 su 70
per type2 classificati 76 su 76
per type3 classificati 23 su 17
per type5 classificati 16 su 13
per type6 classificati 8 su 9
per type7 classificati 22 su 29
-0.82 0.3 0.13 0.06
Notiamo come il classificatore migliori i suoi offset (ultima riga - in questo caso 4) fino ad
aumentare il numero di HIT e abbassare quindi il numero di MISS.
8. Un caso interessante è come in realtà andiamo a ritroso per il type3, che è davvero
difficile da classificare poichè i vetri di type3 non presentano caratteristiche particolari!
Conclusioni
I discriminanti di Fisher e il mio classificatore MAP costruito con una tecnica di
Machine Learning semi-supervisionata hanno dato risultati soddisfacenti già con un basso numero di
parametri e di iterazioni.
Tutt'altra storia per l'approccio Bayes Naive a cui avevamo dato una sola informazione
disponibile.
Contatto dello sviluppatore:
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