You may have figured out already that statistics isn't exactly a science. Lots of terms are open to interpretation, and sometimes there are many words that mean the same thing—like "mean" and "average"—or sound like they should mean the same thing, like significance level and confidence level.
Although they sound very similar, significance level and confidence level are in fact two completely different concepts. Confidence levels and confidence… Continue
Added by Stephanie Glen on September 30, 2019 at 12:00pm —
Co-relation does not equal causation – is a mantra drilled into a Data Scientist from an early age
That’s fine ..
But very few talk of the follow-on question ..
How exactly do you determine causation?
This problem is… Continue
Added by ajit jaokar on September 30, 2019 at 6:33am —
The evolution of the technologies in Big Data in the last 20 years has presented a history of battles with growing data volume. The challenge of big data has not been solved yet, and the effort will certainly continue, with the data volume continuing to grow in the coming years. The original relational database system (RDBMS) and the associated OLTP (Online Transaction Processing) make it so easy to work with data using SQL in all aspects, as long as the data size is small enough to… Continue
Added by Stephanie Shen on September 29, 2019 at 4:00pm —
Power BI provides slicers for a single column, but there are scenarios where it could be useful to consolidate alternative filters for multiple columns in a single slicer. Technically, this is not possible in Power BI through the standard visualizations, but you can use a particular data modeling technique to obtain the desired result.
Consider the case of a Customer table with a geographical hierarchy with Continent, Country,…
Added by Adetayo Kolade on September 29, 2019 at 10:30am —
Monday newsletter published by Data Science Central. Previous editions can be found here. The contribution flagged with a + is our selection for the picture of the week. To subscribe, follow this link.
Added by Vincent Granville on September 29, 2019 at 7:00am —
They say that the best ideas sometimes come to you while you are in the shower, and this idea of how to explain two important Neural Network concepts – Backpropagation and Stochastic Gradient Descent – actually did come to me as I was trying to set the perfect water temperature for my morning shower.
As I was struggling to adjust the two shower handles – one handle that controlled scolding hot and the other handle that controlled flash freezing – it occurred to me that I was a simple… Continue
Added by Bill Schmarzo on September 29, 2019 at 4:29am —
With intense urbanization, the transportation industry works round the clock to suffice the demands of… Continue
Added by Sanjeev Verma on September 27, 2019 at 1:30am —
Overview of changes TensorFlow 1.0 vs TensorFlow 2.0
Earlier this year, Google announced TensorFlow 2.0, it is a major leap from the existing TensorFlow 1.0. The key differences are as follows:
Ease of use: Many old libraries (example tf.contrib) were removed, and some consolidated. For example, in TensorFlow1.x the model could be made using Contrib, layers, Keras or estimators, so many options for the same task confused many new users.… Continue
Added by ajit jaokar on September 25, 2019 at 11:30pm —
The new era of BigData and advances in technology have made significant transitions towards the high functionality of IoT devices. The popularity of IoT devices has led to more easier methods for BigData collection, analysis, and distribution at a rapid rate. According to a report by… Continue
Added by Smith Johnson on September 25, 2019 at 7:30pm —
Bayesian Machine Learning (part -6)
Probabilistic Clustering – Gaussian Mixture Model
Continuing our discussion on probabilistically clustering of our data, where we left out discussion on part 4 of our Bayesian inference series. As we have seen the modelling theory of… Continue
Added by Ashutosh vyas on September 25, 2019 at 9:30am —
Big data analytics has been applied to different spheres of human life. One of the best features of data analytics is its adaptability and wide application specter. We have come through the whole series of articles concerning data science application in various spheres that are… Continue
Added by Igor Bobriakov on September 24, 2019 at 6:31am —
This article was written by Soft Media Lab.
It has the following sections.
- What is Machine Learning?
- How to apply machine learning to…
Added by Andrea Manero-Bastin on September 24, 2019 at 6:30am —
This article was written by Elie Bursztein.
This blog post survey the attacks techniques that target AI (artificial intelligence) systems and how to protect against them.
At a high level, attacks against classifiers can be broken down into three types:
- Adversarial inputs, which are specially crafted inputs that have been developed with the aim of…
Added by Andrea Manero-Bastin on September 24, 2019 at 2:30am —
Summary: Autonomous vehicles (AUVs) and many other systems that need to accurately perceive the world around them will be much better off when image classification moves from 2D to 3D. Here we examine the two leading approaches to 3D classification, Point Clouds and Voxel Grids.
One of the well-known… Continue
Added by William Vorhies on September 23, 2019 at 2:24pm —
Organizations rarely regard data entry as a key strategic operation. In spite of the rise in automation, companies across the world rely on manual data entry for procurement. They employ staff to transfer data from requisition orders, purchase orders, and invoices into enterprise resource planning (ERP) systems such as SAP, Oracle, PeopleSoft, Netsuite, and many others.
Transcription and transposition errors are… Continue
Added by Brady Behrman on September 23, 2019 at 6:30am —
I hate it when I hear senior executives state that they want to become data-driven, as if somehow having data is value in of itself. Now, one can hardly blame the unenlightened executive whose only perspectives on data are associated with statements like “Data is really the new oil” (Wall Street Journal) or “… Continue
Added by Bill Schmarzo on September 23, 2019 at 5:21am —
According to Wikipedia, an ANN is based on a collection of connected units or nodes called artificial neurons, which loosely model the neurons in a biological brain. Each connection, like the synapses in a biological brain, can transmit a signal to other neurons. An artificial neuron that receives a signal then processes it and can signal neurons connected to it.
In ANN implementations, the "signal" at a connection is a real number, and the output of each neuron is computed by some… Continue
Added by Capri Granville on September 23, 2019 at 4:30am —
One of the things that excite the most about the predictive analytics of today is how quickly and bluntly it surpasses the existing benchmarks. Moreover, it penetrates the industries and activities where human creativity has traditionally dominated, adding a futuristic touch to the music, fine arts, fashion or architecture. Following the popular trend, we decided… Continue
Added by Olha Zhydik on September 23, 2019 at 3:30am —
Technical paper, published in IEEE Xplore.
Authorship analysis (AA) is the study of unveiling the hidden properties of authors from textual data. It extracts an author's identity and sociolinguistic characteristics based on the reflected writing styles in the text. The process is essential for various areas,… Continue
Added by Capri Granville on September 22, 2019 at 1:30pm —
The problem has to do with sampling, random numbers and probability distributions, so it is of interest to our community. As Scott Aaronson describes it in his blog, here is the problem:
You can read more here, including answers to… Continue
Added by Capri Granville on September 22, 2019 at 1:30pm —