Text Processing



Language Models, Word2Vec, and Efficient Softmax Approximations

@machinelearnbot

The difference is that the skip-gram model predicts context (surrounding) words given the current word, wheras the continuous bag of words model predicts the current word based on several surrounding words. For example, if we consider the sentence "The quick brown fox jumped over the lazy dog", and a window size of 2, we'd have the following pairs for the skip-gram model: In contrast, for the CBOW model, we'll input the context words within the window (such as "the", "brown", "fox") and aim to predict the target word "quick" (simply reversing the input to prediction pipeline from the skip-gram model). As discussed, the traditional softmax approach can become prohibitively expensive on large corpora, and the hierarchical softmax is a common alternative approach that approximates the softmax computation, but has logarithmic time complexity in the number of words in the vocabulary, as opposed to linear time complexity. Instead we learn word vectors by learning how to distinguish true pairs of (target, context) words from corrupted (target, random word from vocabulary) pairs.


30 Questions to test a data scientist on Natural Language Processing [Solution: Skilltest – NLP] - Analytics Vidhya

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"Analytics Vidhya is a great source to learn data science" "#Analytics-vidhya is a great source to learn @data_science." After performing stopword removal and punctuation replacement the text becomes: "Analytics vidhya great source learn data science" "The next meetup on data science will be held on 2017-09-21, previously it happened on 31/03, 2016" None if these expressions would be able to identify the dates in this text object. Choices A and B are correct because stopword removal will decrease the number of features in the matrix, normalization of words will also reduce redundant features, and, converting all words to lowercase will also decrease the dimensionality. Selection of the number of topics is directly proportional to the size of the data, while number of topic terms is not directly proportional to the size of the data.


A Practical Guide to Artificial Intelligence

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Details vary, but most AI systems today are "trained" by giving them examples of inputs and outputs (i.e., correct decisions), and letting the system generate its own internal rules to predict the output from the input. It also can't automatically associate similar terms, find relationships between terms, understand context, or measure sentiment. There are also many different types of recommendations and ways to make them, including recommendations for similar products, complementary products, most popular products, or best values; recommendations based on the individual, segments, or the entire customer base; recommendations choosing from a few options or a huge catalog; and recommendations in response to a search request. AI-based systems often combine these capabilities, simultaneously finding customer segments and creating new site versions tailored to these segments.


Who Made the News? Text Analysis using R, in 7 steps

@machinelearnbot

The dataset used for the analysis was obtained from Kaggle Datasets, and is attributed to UCI Machine Learning. Clean and pre-process the text by removing punctuations, removing "stop words" (a, the, and, …) using tm_map() function as shown below: Create wordclouds for Publisher "Reuters". The "color" option allows us to specify color palette, "rot.per" We create wordclouds for 2 more publishers (Celebrity Café & CBS_Local) as shown below. This dataset comes from the UCI Machine Learning Repository.


Haptik open-sources its Named Entity Recognition AI technology Gadgets Now

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At the Berlin Chatbot Summit, Haptik, India's largest AI-powered personal assistant, announced that it is open-sourcing its proprietary Named Entity Recognition (NER) System that powers chatbots in the service's Android & iOS apps. READ ALSO: Haptik app gets'smart wallet' feature in latest update He further added, "Developer tools and open source technology play a key part in the evolution of any platform. Haptik, which recently won the Amazon Web Service (AWS) award for Deep Tech in Mobility, has been the first to successfully customize and open source NER Technology for chatbots. READ ALSO: Haptik app gets'smart wallet' feature in latest update


AMD launches its Epyc server chip to take on Intel in the data center

PCWorld

It's not just the folks at AMD who hope that that the company's Epyc server processor, officially launched Tuesday, will break Intel's stranglehold on the data-center chip market. Enterprise users, web hosting companies and hyperscale cloud providers all want competition and choice in server chips to curb costs and fuel innovation. At the high end, in approximately the $4,000 range, AMD internal benchmarks show the Epyc 7601 single-socket package offering 75 percent higher floating point performance (for spreadsheets, graphics and games, for instance) and 47 percent higher integer processing performance (for whole-number and text processing, for example) than Intel's E5-2699A v4. Interestingly, AMD benchmarks show 70 percent higher integer performance over Intel in the mid-range, $800 price point level, with the Epyc 7301 facing off against the Intel E5-7630.


Machine Learning - the robots are coming and they are in neat downloadable often opensource packages.

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Beyond the glamorous and somewhat glitzy background of Machine Learning there are huge new complex sets of machine languages, packages, toolkit, libraries and methods that are making the Machine Learning revolution necessary. OpenCV - The Open Source Computer Vision Library - Is an open source computer vision and machine learning software library. MALLET - MALLET is a Java-based package for statistical natural language processing, document classification, clustering, topic modeling, information extraction, and other machine learning applications to text. MLib - MLlib is Apache Spark's scalable machine learning library.Ease of Use Usable in Java, Scala, Python, and R. Weka3 Data Mining Software in Java - Weka is a collection of machine learning algorithms for data mining tasks.


Cross-Language Plagiarism Detection System Using Latent Semantic Analysis and Learning Vector Quantization

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Computerized cross-language plagiarism detection has recently become essential. With the scarcity of scientific publications in Bahasa Indonesia, many Indonesian authors frequently consult publications in English in order to boost the quantity of scientific publications in Bahasa Indonesia (which is currently rising). Due to the syntax disparity between Bahasa Indonesia and English, most of the existing methods for automated cross-language plagiarism detection do not provide satisfactory results. The results of the experiments showed that the best accuracy achieved is 87% with a document size of 6 words, and the document definition size must be kept below 10 words in order to maintain high accuracy.


Apple Announces Core ML: Machine Learning Capabilities on Apple Devices

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At WWDC 2017 Apple announced ways it uses machine learning, and ways for developers to add machine learning to their own applications. Their machine learning API, called Core ML, allows developers to integrate machine learning models into apps running on Apple devices with iOS, macOS, watchOS, and tvOS. Natural language processing API calls include language identification, tokenization, part of speech tag extraction, and recognizing named entities. It is not possible to import an existing Tensorflow model into Core ML, which would be possible with Tensorflow Lite on Android.