Syntax Analysis: Introduction, Context-Free Grammars, Writing a Grammar, Top-Down Parsing, Bottom-Up Parsing, Introduction to LR Parsing: Simple LR, More Powerful LR Parsers, Using Ambiguous Grammars, Parser Generators.
Syntax Analysis: Introduction, Context-Free Grammars, Writing a Grammar, Top-Down Parsing, Bottom-Up Parsing, Introduction to LR Parsing: Simple LR, More Powerful LR Parsers, Using Ambiguous Grammars, Parser Generators.
Notation, Regular Expressions in Lexical Specification, Error Handling, Finite Automata State Graphs, Epsilon Moves, Deterministic and Non-Deterministic Automata, Table Implementation of a DFA
In this slide you will explore more about how to make derivations ,design parse tree ,what is ambiguity and how to remove ambiguity ,left recursion ,left factoring .
what is Parsing
different types of parsing
what is parser and role of parser
what is top-down parsing and bottom-up parsing
what is the problem in top-down parsing
design of top-down parsing and bottom-up parsing
examples of top-down parsing and bottom-up parsing
Its the first phase of the compiler,useful in generating lexemes ,tokens and matching of the pattern.Its helpful in solving GATE/ UGCNET problems.For more insight refer http://tutorialfocus.net/
العرض التقديمي الخاص بكلية الهندسة المعلوماتية من إعداد المهندس خالد الرفاعي والذي قدمه ضمن مشروع "اختياري مستقبلي" من تنظيم عيادات العمل وبالتعاون مع فريق باشونيرز
Passioneers
Notation, Regular Expressions in Lexical Specification, Error Handling, Finite Automata State Graphs, Epsilon Moves, Deterministic and Non-Deterministic Automata, Table Implementation of a DFA
In this slide you will explore more about how to make derivations ,design parse tree ,what is ambiguity and how to remove ambiguity ,left recursion ,left factoring .
what is Parsing
different types of parsing
what is parser and role of parser
what is top-down parsing and bottom-up parsing
what is the problem in top-down parsing
design of top-down parsing and bottom-up parsing
examples of top-down parsing and bottom-up parsing
Its the first phase of the compiler,useful in generating lexemes ,tokens and matching of the pattern.Its helpful in solving GATE/ UGCNET problems.For more insight refer http://tutorialfocus.net/
العرض التقديمي الخاص بكلية الهندسة المعلوماتية من إعداد المهندس خالد الرفاعي والذي قدمه ضمن مشروع "اختياري مستقبلي" من تنظيم عيادات العمل وبالتعاون مع فريق باشونيرز
Passioneers
DFA minimization algorithms in map reduceIraj Hedayati
Explaining implementation and analysis of two well known DFA minimisation algorithms namely Morore and Hopcroft, in Map Reduce using Hadoop. Cost analysis and complexity are described.
Please follow this link: http://spectrum.library.concordia.ca/980838/
optimization of DFA ,compiler design,minimisation of DFA,DFA optimization,equivalence state removal,DFA optimization,partition method for DFA minimization
Automata theory - describes to derives string from Context free grammar - derivation and parse tree
normal forms - Chomsky normal form and Griebah normal form
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
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Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
2. Regular Languages
• Weakest formal languages widely used
• Many applications
– Lexical Analysis
• Some languages are not regular
• Consider the language
{( i ) i | i ≥ 0}
28-Jan-15 2CS 346 Lecture 5
3. Limitation of Regular Expression
• RE can’t express balance of the nested
parenthesis
• Also can’t express nested loop structure
• What can regular languages express?• What can regular languages express?
S0 S1
1
1
00 • RE can count mod k
• But RE can’t count a number
28-Jan-15 3CS 346 Lecture 5
4. Introduction to Parser
• What the parser do?
– Input to the parser: Sequence of tokens from lexer
– Output of the parser: parse tree of the program
Parser
Input
Grammar
Output or Syntax error
28-Jan-15 4CS 346 Lecture 5
5. Parser
Input: x = a + b * c id = id + id * id
Grammar
S id = E
E E + T / T
T T * F / F
F id
Introduction to Parser
Not all strings of tokens
are valid programs.
Parser must distinguishes
between valid and invalid
strings of tokens.
28-Jan-15 5CS 346 Lecture 5
6. Requirements
• A language is needed for describing valid
strings of tokens
• A method for distinguishing valid strings from• A method for distinguishing valid strings from
the invalid strings
• Programming languages have natural recursive
structure
– if (expr) expr else expr
28-Jan-15 6CS 346 Lecture 5
7. Context Free Grammar
• Formally a CFG G = (T, N, S, P), where:
– T is the set of terminal symbols in the grammar (i.e., the set of
tokens returned by the lexical analyzer)
– N, the non-terminals, are variables that denote sets of
(sub)strings occurring in the language. These impose a structure
on the grammar.
(sub)strings occurring in the language. These impose a structure
on the grammar.
– S is the goal symbol, a distinguished non-terminal in N denoting
the entire set of strings in L(G).
– P is a finite set of productions specifying how terminals and non-
terminals can be combined to form strings in the language. Each
production must have a single non-terminal on its left hand side.
28-Jan-15 7CS 346 Lecture 5
8. CFG – An Example
• Production : X Y1… … YN where
X ϵ N and Yi ϵ N U T U {ɛ}
• The language for balanced parenthesis, i.e.
{( i ) i | i ≥ 0}, CFG productions are{( ) | i ≥ 0}, CFG productions are
S (S)|S
S ɛ
where set of non-Terminals (N) = {S}, set of
Terminals (T)= {(, )} and S is the start symbol
28-Jan-15 8CS 346 Lecture 5
9. Productions represents some rules
• Begin with a string with only the start symbol S
• Replace non terminal X in the string by the RHS of
the some production
– Let X Y … … Y and there is a string– Let X Y1… … Yn and there is a string
– x1… … xi X xi+1… … xN; after using above production
rule, it can be written as
– x1… … xi Y1… … Yn xi+1… … xN
• If α0 α1 α2 … … αn α0 αn
28-Jan-15 9CS 346 Lecture 5
10. • A possible CFG for arithmetic operations:
• E E + E | E * E | (E) | id E
• Input string: id * id + id
E E + E E + E
E * E + E
CFG – An Example
E * E + E
id * E + E E * E
id * id + E
id * id + id id id
• Left-Most Derivation
• Inorder traversal of the leaves give the original input string
• All derivations of a string should yield the same parse tree
28-Jan-15 10CS 346 Lecture 5