Education
Ordinal Regression with Fenton-Wilkinson Order Statistics: A Case Study of an Orienteering Race
In sports, individuals and teams are typically interested in final rankings. Final results, such as times or distances, dictate these rankings, also known as places. Places can be further associated with ordered random variables, commonly referred to as order statistics. In this work, we introduce a simple, yet accurate order statistical ordinal regression function that predicts relay race places with changeover-times. We call this function the Fenton-Wilkinson Order Statistics model. This model is built on the following educated assumption: individual leg-times follow log-normal distributions. Moreover, our key idea is to utilize Fenton-Wilkinson approximations of changeover-times alongside an estimator for the total number of teams as in the notorious German tank problem. This original place regression function is sigmoidal and thus correctly predicts the existence of a small number of elite teams that significantly outperform the rest of the teams. Our model also describes how place increases linearly with changeover-time at the inflection point of the log-normal distribution function. With real-world data from Jukola 2019, a massive orienteering relay race, the model is shown to be highly accurate even when the size of the training set is only 5% of the whole data set. Numerical results also show that our model exhibits smaller place prediction root-mean-square-errors than linear regression, mord regression and Gaussian process regression.
Extendable and invertible manifold learning with geometry regularized autoencoders
Duque, Andrés F., Morin, Sacha, Wolf, Guy, Moon, Kevin R.
A fundamental task in data exploration is to extract simplified low dimensional representations that capture intrinsic geometry in data, especially for the purpose of faithfully visualizing data in two or three dimensions. Common approaches to this task use kernel methods for manifold learning. However, these methods typically only provide an embedding of fixed input data and cannot extend to new data points. On the other hand, autoencoders have recently become widely popular for representation learning, but while they naturally compute feature extractors that are both extendable to new data and invertible (i.e., reconstructing original features from latent representation), they provide limited capabilities to follow global intrinsic geometry compared to kernel-based manifold learning. Here, we present a new method for integrating both approaches by incorporating a geometric regularization term in the bottleneck of the autoencoder. Our regularization, based on the diffusion potential distances from the recently-proposed PHATE visualization method, encourages the learned latent representation to follow intrinsic data geometry, similar to manifold learning algorithms, while still enabling faithful extension to new data and reconstruction of data in the original feature space from latent coordinates. We compare our approach with leading kernel methods and autoencoder models for manifold learning to provide qualitative and quantitative evidence of our advantages in preserving intrinsic structure, out of sample extension, and reconstruction.
Causal Inference using Gaussian Processes with Structured Latent Confounders
Witty, Sam, Takatsu, Kenta, Jensen, David, Mansinghka, Vikash
Latent confounders---unobserved variables that influence both treatment and outcome---can bias estimates of causal effects. In some cases, these confounders are shared across observations, e.g. all students taking a course are influenced by the course's difficulty in addition to any educational interventions they receive individually. This paper shows how to semiparametrically model latent confounders that have this structure and thereby improve estimates of causal effects. The key innovations are a hierarchical Bayesian model, Gaussian processes with structured latent confounders (GP-SLC), and a Monte Carlo inference algorithm for this model based on elliptical slice sampling. GP-SLC provides principled Bayesian uncertainty estimates of individual treatment effect with minimal assumptions about the functional forms relating confounders, covariates, treatment, and outcome. Finally, this paper shows GP-SLC is competitive with or more accurate than widely used causal inference techniques on three benchmark datasets, including the Infant Health and Development Program and a dataset showing the effect of changing temperatures on state-wide energy consumption across New England.
Deep Learning at Scale with PyTorch, Azure Databricks, and Azure Machine Learning
PyTorch is a popular open source machine learning framework. PyTorch is ideal for deep learning applications such as computer vision and natural language processing. MLflow is an open source platform for the end-to-end machine learning lifecycle. Delta Lake is an open source storage layer that brings reliability to data lakes. Azure Databricks is the first-party Databricks service on Azure that provides massive scale data engineering and collaborative data science.
How To Create An AI (Artificial Intelligence) Model
Digital generated image of data. Lemonade is one of this year's hottest IPOs and a key reason for this is the company's heavy investments in AI (Artificial Intelligence). The company has used this technology to develop bots to handle the purchase of policies and the managing of claims. Then how does a company like this create AI models? Well, as should be no surprise, it is complex and susceptible to failure.
Take a deep dive into AI with this $35 training bundle
It's not an exaggeration to say that when it comes to the future of human progress, nothing is more important than Artificial Intelligence (AI). Although often thought to only be associated with everyday entities such as self-driving cars and Google search rankings, AI is in fact the driving force behind virtually every major and minor technology that's bringing people together and solving humanity's problems. You'd be hard-pressed to find an industry that hasn't embraced AI in some shape or form, and our reliance on this field is only going to grow in the coming years--as microchips become more powerful and quantum computing begins to be more accessible. So it should go without saying that if you're truly interested in staying ahead of the curve in an AI-driven world, you're going to have to have at least a baseline understanding of the methodologies, programming languages, and platforms that are used by AI professionals around the world. This can be an understandably intimidating reality for anyone who doesn't already have years of experience in tech or programming, but the good news is that you can master the basics and even some of the more advanced elements of AI and all of its various implications without spending an obscene amount of time or money on a traditional education.
Artificial Intelligence & Machine Learning Training Program
Google CEO: Sundar Pichai - A.I. is more important than fire or electricity Artificial Intelligence (AI) and Machine Learning (ML) are changing the world around us. From functions to industries, AI and ML are disrupting how we work and how we function. Artificial intelligence, defined as intelligence exhibited by machines, has many applications in today's society. More specifically, it is Weak AI, the form of AI where programs are developed to perform specific tasks, that is being utilized for a wide range of activities including medical diagnosis, electronic trading platforms, robot control, and remote sensing. AI has been used to develop and advance numerous fields and industries, including finance, healthcare, education, transportation, and more.
The 10 Best AI And Data Science Undergraduate Courses For 2021
Artificial Intelligence is the hottest topic in technology and commerce today, and the field of data science is fundamental to how it works. Courses in data science all now contain a strong AI presence, and a few institutions are already offering specialized undergraduate degrees in AI. The increasing number of colleges and universities offering courses in these subjects indicates industry-wide expectations that there will be a world of rewarding opportunities for those with formal training and accreditation. Well, according to Glassdoor.com the average salary last year for a data scientist stood at $107,000. So, it's certainly a career worth considering if earning a good starting wage is on your list of priorities!
Innovative Education at IIMT
IIMT College of Engineering is showing its beautiful academic face proudly to attract the inquisitive young minds to fulfil their dreams of becoming a successful engineering graduate. IIMT has got a shining face not by only applying the latest management gloss. It has not created a fetish of ranking in NCR as a ritual only. Actually IIMT college of Engineering has rewritten the contract between the engineering education and the striving middle class Indian society. It has rewritten the solidarity between faculty and students. It has believed in age old guru-shishya tradition.