Earlier than Jun-18-2017

Machine Learning


The path to becoming a Data Scientist is a lot of learning. After being dubbed "sexiest job of the 21st Century" by Harvard Business Review, data scientists... To know more log on to www.extentia.com

Deep Learning for Semantic Segmentation of Aerial Imagery - Azavea - Beyond Dots on a Map


This blog was coauthored by Lewis Fishgold and Rob Emanuele. Aerial and satellite imagery gives us the unique ability to look down and see the earth from above. It is being used to measure deforestation, map damaged areas after natural disasters, spot looted archaeological sites, and has many more current and untapped use cases. At Azavea, we understand the potential impact that imagery can have on our understanding of the world. We also understand that the enormous and ever-growing amount of imagery presents a significant challenge: how can we derive value and insights from all of this data? There are not enough people to look at all of the images all of the time.

MAGAZINE: Artificial Intelligence in Banking Finance Digest Magazine


Artificial Intelligence (AI) is already a ubiquitous part of our everyday lives. Think of asking Siri a question or having your car automatically manoeuvre to park itself – more of our daily devices rely on AI disciplines to apply interpretation and understanding to give information context, and thereby learn and act. The use of AI is growing and there has been much debate about its use by banks to streamline processes and add value, some of which we are already seeing in the form of robo advisors and big data processors. AI has the potential to address many of the challenges and expand opportunities for banks – reducing middle and back office administration, for example. To better assess the potential application and benefits of AI for financial institutions, we first need to clarify what we mean by artificial intelligence and exactly how it is different from'traditional' technology.

Everyone keeps talking about AI--here's what it really is and why it's so hot now


Interest in the field fluctuated over time. AI winters came in the 1970s and 1980s as public interest waned and outside funding dried up. Startups boasting promising capabilities and venture capital backing in the mid-1980s abruptly disappeared, as John Markoff detailed in his 2015 book "Machines of Loving Grace." There are several other terms you often hear in connection to AI. Machine learning generally entails teaching a machine how to do a particular thing, like recognizing a number, by feeding it a bunch of data and then directing it to make predictions on new data. The big deal about machine learning now is that it's getting easier to invent software that can learn over time and get smarter as it accumulates more and more data.

Facebook Bot Learns to Lie to Get What It Wants The Deep State


In an experiment by Facebook's AI researchers, chatbots were paired off and set the task of dividing a collection of items among themselves. Each item was designated a certain value based on how much the chatbot cared about them. Researchers noted that the haggling bots were quick to discover that lying about their interest in an item could bring them favorable results. "There were cases where agents initially feigned interest in a valueless item, only to later'compromise' by conceding it – an effective negotiating tactic that people use regularly," the researchers said in a statement. "This behavior was not programmed by the researchers but was discovered by the bot as a method for trying to achieve its goals."

Robot Revolution: Amazon's Move Signals End of Line for Many Cashiers

NYT > Economy

Imagine this scene from the future: You walk into a store and are greeted by name, by a computer with facial recognition that directs you to the items you need. You peruse a small area -- no chance of getting lost or wasting time searching for things -- because the store stocks only sample items. You wave your phone in front of anything you want to buy, then walk out. In the back, robots retrieve your items from a warehouse and deliver them to your home via driverless car or drone. Amazon's $13.4 billion purchase of Whole Foods, announced Friday, could speed that vision along.

Tesla mechanics rescue a cute kitten that got stuck inside a Model X bumper


Of all the things that could possibly go wrong with your electric self-driving car, finding a kitten inside your bumper may be the cutest of them all. An unnamed Model X owner uploaded two clips to YouTube on Saturday that show a teeny kitten trapped inside the bumper of his vehicle. "So this morning, I heard a meow in my garage," the man said in the clip. "And we don't have a cat." After narrowing down the meows to his vehicle, then the rear bumper, the man decided to bring his car into a Tesla service center to get a little help rescuing the cat safely.



Basically, each X(t n) consists of a full set of connections that are input at that particular timestep of the sequence. Also not shown are the fact that each gate and cell has it's own set of weights and biases for both the input and recurrent connections. Thus, an LSTM actually has four sets of input and recurrent weight and bias parameters. In practice this means that usually the input is represented as a tensor with three dimensions (batch, timestep, input).

Python, Machine Learning, and Language Wars. A Highly Subjective Point of View


Sebastian Raschka is the author of the bestselling book "Python Machine Learning." As a Ph.D. candidate at Michigan State University, he is developing new computational methods in the field of computational biology. Sebastian has many years of experience with coding in Python and has given several seminars on the practical applications of data science and machine learning. Sebastian loves to write and talk about data science, machine learning, and Python, and he is really motivated to help people developing data-driven solutions without necessarily requiring a machine learning background. Why did I bother writing this? Well, here is one of the most trivial yet life-changing insights and worldly wisdoms from my former professor that has become my mantra ever since: "If you have to do this task more than 3 times just write a script and automate it."

A Tutorial on the Expectation Maximization (EM) Algorithm


During the E-step we are calculating the expected value of cluster assignments. During the M-step we are calculating a new maximum likelihood for our hypothesis. Bio: Elena Sharova is a data scientist, financial risk analyst and software developer. She holds an MSc in Machine Learning and Data Mining from University of Bristol.