Over the last four months, I attended an immersive data science program at Galvanize in San Francisco. As a graduation requirement, the last three weeks of the program are reserved for a student-selected project that puts to use the skills learned throughout the course. The project that I chose to tackle utilized natural language processing in tandem with sentiment analysis to parse and classify news articles. With the controversy surrounding our nation's media and the concept of "fake news" floated around every corner, I decided to take a pragmatic approach to address bias in the media. My resulting model identified three topics within an article and classified the sentiments towards each topic.

Motivated by Supervised Opinion Analysis, we propose a novel framework devoted to Structured Output Learning with Abstention (SOLA). The structure prediction model is able to abstain from predicting some labels in the structured output at a cost chosen by the user in a flexible way. For that purpose, we decompose the problem into the learning of a pair of predictors, one devoted to structured abstention and the other, to structured output prediction. To compare fully labeled training data with predictions potentially containing abstentions, we define a wide class of asymmetric abstention-aware losses. Learning is achieved by surrogate regression in an appropriate feature space while prediction with abstention is performed by solving a new pre-image problem. Thus, SOLA extends recent ideas about Structured Output Prediction via surrogate problems and calibration theory and enjoys statistical guarantees on the resulting excess risk. Instantiated on a hierarchical abstention-aware loss, SOLA is shown to be relevant for fine-grained opinion mining and gives state-of-the-art results on this task. Moreover, the abstention-aware representations can be used to competitively predict user-review ratings based on a sentence-level opinion predictor.

Dynamic topic models (DTMs) model the evolution of prevalent themes in literature, online media, and other forms of text over time. DTMs assume that word co-occurrence statistics change continuously and therefore impose continuous stochastic process priors on their model parameters. These dynamical priors make inference much harder than in regular topic models, and also limit scalability. In this paper, we present several new results around DTMs. First, we extend the class of tractable priors from Wiener processes to the generic class of Gaussian processes (GPs). This allows us to explore topics that develop smoothly over time, that have a long-term memory or are temporally concentrated (for event detection). Second, we show how to perform scalable approximate inference in these models based on ideas around stochastic variational inference and sparse Gaussian processes. This way we can train a rich family of DTMs to massive data. Our experiments on several large-scale datasets show that our generalized model allows us to find interesting patterns that were not accessible by previous approaches.

In this paper we study the frequentist convergence rate for the Latent Dirichlet Allocation (Blei et al., 2003) topic models. We show that the maximum likelihood estimator converges to one of the finitely many equivalent parameters in Wasserstein's distance metric at a rate of $n^{-1/4}$ without assuming separability or non-degeneracy of the underlying topics and/or the existence of more than three words per document, thus generalizing the previous works of Anandkumar et al. (2012, 2014) from an information-theoretical perspective. We also show that the $n^{-1/4}$ convergence rate is optimal in the worst case.

Advanced topic extraction using AI & machine learning, natural language processing, and regex classifiers to identify topics across all data sources - enabling organizations to diagnose not only what is happening in customer interactions, but why it's happening. Sentiment analysis and entity recognition using proprietary and open source algorithms to understand the overall sentiment and label data by types such as person, organization, location, events, and products. Pre-configured industry dashboards and classifier libraries that address the most common uses cases for sales, churn and compliance to jumpstart time-to-value. Data connectors to a variety of data sources and destinations, send classified data to an internal visualization tool or build powerful apps using the ListenLogic API. On premise or cloud deployment leveraging proprietary data redaction that removes personally identifiable information for an added level of security.

The need for technology to catch up to our imaginations has been a constant feature of AI since the first spark of an idea flickered into existence. This is because no matter how far it comes, there will always be a new generation for whom it is still inadequate. Sam Zimmerman, CTO & Co-founder at Freebird and another one of our speakers, describes the immense amount of progress which has been made since he entered the machine learning world less than 8 years ago. "When I first entered the field in 2011, machine learning was just beginning to extend outside of advertising and finance into domains like sentiment analysis and computer vision. Largely this was a migration from quite clear optimizations of well-defined outcome variables (like click-through-rates and PnL) to much more abstract, subjective, and ill-defined outcome variables (like the "sentiment" of a sentence or the "setting" of a photo)."

I want to do sentiment analysis on customer reviews but they are in different laguages some are in German, some are in spanish, and many others. I tried to use translateR package but I didn't get desire output. I think I didn't generate my google API key properly Can anyone please tell me how can I convert multiple language in to English and How can I generate Google translator API without Billing? Please give me some suggestion.

Back to the University Ranking of my designed application. Ranking technology in my application is to parse tweets crawled from Twitter and then rank related tweets according to their relevance to a specific university. I want to filter high-related tweets (topK) to do the Sentiment Analysis, which will avoid trivial tweets that make our results inaccurate. There are may ranking methods actually, such as rank them based on TF-IDF similarity, text summarization, spatial and temporal factors or machine learning ranking method. Even Twitter itself has provided a method based on time or popularity. However, we need a more advanced method which can filter out the most spam and trivial tweets.

No knowledge of machine learning is required for using the Signals model builder. Just choose from a variety of indicators, ranging from traditional technical analysis to deep learning or sentiment analysis based on media monitoring and combine them together. If you do happen to be a developer or a data scientist, you can develop new trading indicators from scratch and monetize your data science skills through the Signals Indicator Marketplace.

Founded in 2008, iSentium's expert team hails from both industry and academia and has collectively published more than 200 papers and 18 books. I am the CEO of iSentium. Given the small size of our team, I am deeply involved in the day-to-day running of the firm. B) sales and market development, given that we are in early innings with respect to applied artificial intelligence. I attended the University of Houston where I studied electrical engineering and history.