AI in Big Data

Overview of Artificial Intelligence and Role of Natural Language Processing in Big Data Artificial Intelligence Overview AI refers to ‘Artificial Intelligence’ which means making machin

Overview of Artificial Intelligence and Role of Natural Language

Processing in Big Data

Artificial Intelligence Overview

AI refers to ‘Artificial Intelligence’ which means making machines capable of performing quick tasks like human beings AI performs automated tasks using intelligence

The term Artificial Intelligence has two key components

- Automation

 Intelligence

Goals & Applications of Artificial Intelligence

Evolution of Artificial Intelligence

 Machine Learning

It is a set of algorithms used by intelligent systems to learn from experience

 Machine Intelligence

These are the advanced round of algorithms used by machines to learn from experience E.g - Deep Neural Networks

Artifical Intelligence technology is currently at this stage

 Machine Consciousness

It is self-learning from experience without the need for external data

3 Types of Artificial Intelligence

 Artificial Narrow Intelligence (ANI)

It comprises of primary/role tasks such as those performed by chatbots,

personal assistants like SIRI by Apple and Alexa by Amazon

 Artificial General Intelligence (AGI)

Artificial General Intelligence comprises of human-level tasks such as performed by self-driving cars by Uber, Autopilot by Tesla It involves continual learning by the machines

 Artificial Super Intelligence (ASI)

Artificial Super Intelligence refers to intelligence way smarter than humans.

What Makes System AI Enabled

Difference Between AI, NLP, ML, DL &

Neural Networks

 Artificial Intelligence (AI)

Building systems that can do intelligent things

 Natural Language Processing (NLP)

Building systems that can understand language It is a subset of Artificial Intelligence

 Machine Learning (ML)

Building systems that can learn from experience It is also a subset of Artificial Intelligence

 Neural Network (NN)

A biologically inspired network of Artificial Neurons

 Deep Learning (DL)

Building systems that use Deep Neural Network on a large set of data It is

a subset of Machine Learning

What is Natural Language Processing(NLP)?

Natural Language Processing (NLP) is “ability of machines to understand and interpret human language the way it is written or spoken.”

The objective of NLP is to make computer/machines as intelligent as human beings in understanding language

The ultimate goal of NLP is to the fill the gap how the people communicate (natural language) and what the computer understands (machine language)

There are three different levels of linguistic analysis done before performing NLP

- Syntax - What part of given text is grammatically right.

 Semantics - What is the meaning of given text?

 Pragmatics - What is the purpose of the text?

NLP deal with different aspects of language such as

 Phonology - It is systematic organization of sounds in language.

 Morphology - It is a study of words formation and their relationship

with each other

Approaches of NLP for understanding semantic analysis

 Distributional - It employs large-scale statistical tactics of Machine

Learning and Deep Learning

 Frame-Based - The sentences which are syntactically different but

semantically same are represented inside data structure (frame) for the stereotyped situation

 Theoretical - This approach builds on the idea that sentences refer to

the real world (the sky is blue) and parts of the sentence can be combined to represent whole meaning

 Interactive Learning - It involves pragmatic approach and user is

responsible for teaching the computer to learn the language step by step in an interactive learning environment

The real success of NLP lies in the fact that humans deceive into believing that they are talking to humans instead of computers

Importance of Natural Language

Processing(NLP)

With NLP, it is possible to perform certain tasks like Automated Speech and Automated Text Writing in less time.

Due to the presence of significant data (text) around, why not we use the computers untiring willingness and ability to run several algorithms to perform tasks in no time

These tasks include other NLP applications like Automatic Summarization (to generate summary of given text) and Machine Translation (translation of one language into another)

Process of Natural Language Processing

In case the text is composed of speech, speech-to-text conversion is performed

The mechanism of Natural Language Processing involves two processes

- Natural Language Understanding

 Natural Language Generation

Natural Language Understanding

NLU or Natural Language Understanding tries to understand the meaning

of given text The nature and structure of each word inside text must be known for NLU For understanding structure, NLU attempting to resolve following ambiguity present in natural language

- Lexical Ambiguity - Words have multiple meanings

 Syntactic Ambiguity - Sentence is having multiple parse trees.

 Semantic Ambiguity - Sentence having multiple meanings

 Anaphoric Ambiguity - Phrase or word which is previously

mentioned but has a different meaning

Next, the sense of each word is understood by using lexicons (vocabulary) and set of grammatical rules

However, certain different words are having similar meaning (synonyms) and words having more than one meaning (polysemy)

Natural Language Generation

It is the process of automatically producing text from structured data in a readable format with meaningful phrases and sentences The problem of natural language generation is hard to deal It is subset of NLP

Natural language generation divided into three proposed stages

- Text Planning - Ordering of the primary content in structured data is

done

 Sentence Planning - The sentences are combined with structured

data to represent the flow of information

 Realization - Grammatically correct sentences are produced finally to

represent text

Difference Between NLP and Text Mining

Natural language processing is responsible for understanding meaning and structure of given text

Text Mining or Text Analytics is a process of extracting hidden information inside text data through pattern recognition

Natural language processing is used to understand the meaning (semantics) of given text data, while text mining is used to understand structure (syntax) of given text data

As an example - I found my wallet near the bank The task of NLP is to figure out in the end that ‘bank’ refers to financial institute or ‘river bank.'

What is Big Data?

According to the Author Dr Kirk Borne, Principal Data Scientist, Big Data Definition is described as big data is everything, quantified, and tracked

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Big Data For Natural Language Processing

Today around 80 % of total data is available in the raw form Big Data comes from information stored in big organizations as well as enterprises Examples include information about employees, company purchase, sale records, business transactions, the previous record of organizations, social media, etc

Though human uses language, which is ambiguous and unstructured to be interpreted by computers, yet with the help of NLP, this large unstructured data can be harnessed for evolving patterns inside data to know better the information contained in data

NLP can solve significant problems of the business world by using Big Data Be it any business of retail, healthcare, business, financial institutions

What is a Chatbot?

Chatbots or Automated Intelligent Agents

 These are the computer program you can talk to through messaging apps, chat windows or through voice calling apps

 These are intelligent digital assistants used to resolve customer queries in a cost-effective, quick, and consistent manner

Why Are Chatbots Essential For Business

Chatbots are critical to understanding changes in digital customer care services provided and in many routine queries that are most frequently enquired

Chatbots are useful in a certain scenario when the client service requests are specified in the area and highly predictable, managing a high volume of similar requests, automated responses

How Does A Chatbot Work?

Image Source - blog.wizeline.com

 Knowledge Base - It contains the database of information that is

used to equip chatbots with the information needed to respond to queries of customers request

 Data Store - It contains interaction history of chatbot with users.

 NLP Layer - It translates users queries (free form) into information

that can be used for appropriate responses

 Application Layer - It is the application interface that is used to

interact with the user

Chatbots learn each time they make interaction with the user trying to match the user queries with the information in the knowledge base using Machine Learning

Deep Learning For NLP

 It uses a rule-based approach that represents Words as ‘One-Hot’ encoded vectors

 The traditional method focuses on syntactic representation instead of semantic representation

 Bag of words - classification model is unable to distinguish certain contexts

3 Capability Levels of Deep Learning Intelligence

Expressibility - This quality describes how well a machine can

approximate universal functions

Trainability - How well and quickly a Deep Learning system can learn its

problem

Generalizability - How well the machine can perform predictions on data

that it has not been trained

There are of course other capabilities that also need to be considered

in Deep Learning such as Interpretability, modularity, transferability, latency, adversarial stability, and security But these are the main ones

Applications of Deep Learning in NLP

Deep Learning Algorithms NLP Usage

Neural Network - NN

(feed)

 Part-of-speech Tagging

 Tokenization

 Named Entity Recognition

 Intent Extraction

Recurrent Neural

Networks -(RNN)

 Machine Translation

 Question Answering System

 Image Captioning

Recursive Neural

Networks

 Parsing sentences

 Sentiment Analysis

 Paraphrase detection

 Relation Classification

 Object detection

Convolutional Neural

Network -(CNN)

 Sentence/ Text classification

 Relation extraction and classification

 Spam detection

 Categorization of search queries

 Semantic relation extraction

Difference Between Classical NLP & Deep Learning NLP

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NLP For Log Analysis and Log Mining

What is Log?

A collection of messages from different network devices and hardware in time sequence represents a log Logs may be directed to files present on hard disks or can be sent over the network as a stream of messages to log collector

Logs provide the process to maintain and track the hardware performance, parameters tuning, emergency and recovery of systems and optimization of applications and infrastructure

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Log Mining & Anomaly Detection

What is Log Analysis?

Log analysis is the process of extracting information from logs considering the different syntax and semantics of messages in the log files and interpreting the context with application to have a comparative analysis of log files coming from various sources for Anomaly Detectionand finding correlations

What is Log Mining?

Log Mining or Log Knowledge Discovery is the process of extracting

patterns and correlations in logs to reveal knowledge and predict Anomaly Detection if any inside log messages.

Natural Language Processing Techniques

Different methods used for performing log analysis are described below

 Pattern recognition

It is one such technique which involves comparing log messages with messages stored in pattern book to filter out messages

 Normalization

Normalization of log messages is done to convert different messages into the same format This is done when different log messages have different terminology, but the same interpretation is coming from various sources like applications or operating systems

 Classification & Tagging

Classification & Tagging of different log messages involves ordering of messages and tagging them with the various keywords for later analysis

 Artificial Ignorance

It is a kind of technique using Machine Learning Algorithms to discard uninteresting log messages It is also used to detect an Anomaly in the ordinary working of systems

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Role of NLP in Log Analysis & Log Mining

Natural Language processing techniques are widely used in Log Analysis and Log Mining.

The different techniques such as tokenization, stemming, lemmatization, parsing, etc are used to convert log messages into structured form

Once logs are available in the well-documented form, log analysis, and log mining is performed to extract useful information and knowledge is discovered from information

The example in case of error log caused due to server failure

Diving into Natural Language Processing

Natural language processing is a complex field and is the intersection

of Artificial Intelligence, computational linguistics, and computer science Getting started with Natural Language Processing

The user needs to import a file containing text written Then the user should perform the following steps for natural language processing

Sentence Segmentation

Mark met the president He said:”Hi!

What’s up -Alex?”

 Sentence 1 -Mark met the president

 Sentence 2 - He said: ”Hi! What’s

up - Alex?”

Tokenization My phone tries

to ‘charging’

from

 [My] [phone] [tries] [to] [‘] [charging] [‘]

state

[from] [‘] [discharging] [‘] [state][.]

Stemming/

Lemmatization

Drinking, Drank, Drunk  Drink

Part-of-Speech tagging If you build ithe will come.

 IN - prepositions and

subordinating conjunctions

 PRP - Personal Pronoun

 VBP - Verb Noun 3rd person singular present form

 PRP- Personal pronoun

 MD - Modal Verbs

 VB - Verb base form

Parsing Mark and Joewent into a bar.

 (S(NP(NP Mark) and (NP(Joe))

 (VP(went (PP into (NP a bar))))

Recognition

Let’s meet Alice at 6 am in India

 Let’s meet Alice

at 6 am in India

 Person Time Location

Coreference resolution Mark went into

the mall He thought it was

a shopping

 Mark went into the mall He thought it was a shopping mall

 Sentence segmentation - It identifies sentence boundaries in the

given text, i.e., where one sentence ends and where another sentence begins Sentences are often marked ended with punctuation mark ‘.’

 Tokenization - It identifies different words, numbers, and other

punctuation symbols

 Stemming - It strips the ending of words like ‘eating’ is reduced to

‘eat.’

 Part of speech (POS) tagging - It assigns each word in a sentence

its own part-of-speech tag such as designating word as noun or adverb

 Parsing - It involves dividing given text into different categories To

answer a question like this part of sentence modify another part of the sentence

 Named Entity Recognition - It identifies entities such as persons,

location and time within the documents

 Co-Reference resolution - It is about defining the relationship of

given the word in a sentence with a previous and the next sentence

Key Application Areas of Natural Language Processing

Apart from use in Big Data, Log Mining, and Log Analysis, it has other significant application areas

Although the term ‘NLP’ is not as popular as ‘big data’ ‘machine learning’ but we are using NLP every day

 Automatic summarizer

Given the input text, the task is to write a summary of text discarding irrelevant points

 Sentimental analysis