As of my last knowledge update in January 2022, here are some key events and trends related to knowledge representation in the field of artificial intelligence (AI):
Knowledge Graphs: Knowledge graphs became increasingly important for representing structured and interconnected knowledge. Major organizations and platforms, such as Google's Knowledge Graph, Facebook's Open Graph, and Wikidata, continued to expand their knowledge graph initiatives.
Semantic Web: The development of the Semantic Web continued to progress, with standards like RDF (Resource Description Framework) and OWL (Web Ontology Language) being used to structure and represent data on the web in a semantically meaningful way.
Ontologies and Industry Standards: Ontologies, which are formal representations of knowledge in specific domains, gained prominence in various fields. Industry-specific ontologies and standards, such as HL7 FHIR in healthcare, were developed and adopted to improve data interoperability.
AI and Knowledge-Based Systems: Knowledge representation remained a foundational component of AI systems, particularly in expert systems. These systems were used in various applications, including medical diagnosis, financial analysis, and troubleshooting.
Hybrid Models: Researchers explored hybrid models that combined symbolic AI (knowledge-based) with connectionist AI (neural networks) to leverage the strengths of both approaches. This approach aimed to address the limitations of purely symbolic or purely neural models.
AI in Chatbots and Virtual Assistants: Chatbots and virtual assistants, powered by knowledge representation and natural language processing, continued to advance, offering improved conversational capabilities and knowledge retrieval.
Knowledge Representation for Explainable AI: As the need for explainable AI grew, knowledge representation played a role in providing transparent and interpretable models. This was particularly important in domains where AI decisions had significant consequences, such as healthcare and finance.
Research in Commonsense Reasoning: Advancements were made in commonsense reasoning, with the goal of enabling AI systems to understand and reason about everyday human knowledge and context.
Knowledge Representation and COVID-19: During the COVID-19 pandemic, knowledge representation played a vital role in aggregating and organizing data related to the virus, treatments, and vaccine research.
AI and the Semantic Web: The integration of AI technologies with the Semantic Web aimed to make web data more semantically meaningful, enhancing search engines, recommendation systems, and data integration.
this presentation is about planning process in AI. The presentation specifically explained POP(Partial order Planning). There are also another planning. In this presentation with help of an example the presentation is briefly explained the planning is done in AI
Knowledge representation In Artificial IntelligenceRamla Sheikh
facts, information, and skills acquired through experience or education; the theoretical or practical understanding of a subject.
Knowledge = information + rules
EXAMPLE
Doctors, managers.
Knowledge representation and reasoning (KR) is the field of artificial intelligence (AI) dedicated to representing information about the world in a form that a computer system can utilize to solve complex tasks such as diagnosing a medical condition or having a dialog in a natural language
this presentation is about planning process in AI. The presentation specifically explained POP(Partial order Planning). There are also another planning. In this presentation with help of an example the presentation is briefly explained the planning is done in AI
Knowledge representation In Artificial IntelligenceRamla Sheikh
facts, information, and skills acquired through experience or education; the theoretical or practical understanding of a subject.
Knowledge = information + rules
EXAMPLE
Doctors, managers.
Knowledge representation and reasoning (KR) is the field of artificial intelligence (AI) dedicated to representing information about the world in a form that a computer system can utilize to solve complex tasks such as diagnosing a medical condition or having a dialog in a natural language
This lecture has been taken for teh AICTE sponsored workshop on web mining. It covers infromation retrieval, searching, meta search engine, focused search engine, web mining, agent based web, knowledge management on web, ontology management systems and wisom web.
Search techniques in ai, Uninformed : namely Breadth First Search and Depth First Search, Informed Search strategies : A*, Best first Search and Constraint Satisfaction Problem: criptarithmatic
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
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Our Vision & Mission – Simplifying Students Life
Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
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Introduction Artificial Intelligence a modern approach by Russel and Norvig 1Garry D. Lasaga
In computer science, artificial intelligence, sometimes called machine intelligence, is intelligence demonstrated by machines, in contrast to the natural intelligence displayed by humans and animals. - Wikipedia
Foundations of Knowledge Representation in Artificial Intelligence.pptxkitsenthilkumarcse
Knowledge representation in artificial intelligence (AI) is a fundamental concept that involves the process of structuring and encoding knowledge so that AI systems can understand, reason, and make decisions. Effective knowledge representation is essential for AI systems to model and work with complex real-world information. Here are some key aspects of knowledge representation in AI:
Symbolic Knowledge Representation: This approach uses symbols and rules to represent knowledge. It involves encoding information using symbols, predicates, and logical statements. Common formalisms include first-order logic and propositional logic. Symbolic representation is particularly suited for knowledge-based systems and expert systems.
Semantic Networks: In a semantic network, knowledge is represented using nodes and links to denote relationships between concepts. This form of representation is intuitive and is often used for organizing knowledge in a structured manner.
Frames and Ontologies: Frames and ontologies are used to represent knowledge by structuring information into frames or classes. Frames contain attributes and values, and they help in organizing and categorizing knowledge. Ontologies, such as OWL (Web Ontology Language), provide a more formal representation of knowledge for use in the semantic web and knowledge graphs.
Rule-Based Systems: Rule-based systems use a set of rules to represent and reason with knowledge. These rules can be encoded in the form of "if-then" statements, allowing AI systems to make decisions and draw inferences.
Fuzzy Logic: Fuzzy logic allows for the representation of uncertainty and vagueness in knowledge. It is particularly useful in situations where information is not black and white but falls within degrees of truth.
Bayesian Networks: Bayesian networks represent knowledge using probability distributions and conditional dependencies. They are valuable for modeling uncertain or probabilistic relationships in various domains, such as medical diagnosis and risk analysis.
Connectionist Models: Connectionist models, like neural networks, use distributed representations to encode knowledge. In these models, knowledge is spread across interconnected nodes (neurons), and learning occurs through the adjustment of connection weights. These networks are particularly effective in tasks such as pattern recognition and natural language processing.
Hybrid Approaches: Many AI systems use a combination of different knowledge representation techniques to address the complexities of real-world problems. For instance, combining symbolic representation with connectionist models is a common approach in modern AI.
The choice of knowledge representation method depends on the specific problem domain, the nature of the data, and the requirements of the AI system.
This lecture has been taken for teh AICTE sponsored workshop on web mining. It covers infromation retrieval, searching, meta search engine, focused search engine, web mining, agent based web, knowledge management on web, ontology management systems and wisom web.
Search techniques in ai, Uninformed : namely Breadth First Search and Depth First Search, Informed Search strategies : A*, Best first Search and Constraint Satisfaction Problem: criptarithmatic
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
We connect Students who have an understanding of course material with Students who need help.
Benefits:-
# Students can catch up on notes they missed because of an absence.
# Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand
# Students can earn better grades, save time and study effectively
Our Vision & Mission – Simplifying Students Life
Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
Like Us - https://www.facebook.com/FellowBuddycom
Introduction Artificial Intelligence a modern approach by Russel and Norvig 1Garry D. Lasaga
In computer science, artificial intelligence, sometimes called machine intelligence, is intelligence demonstrated by machines, in contrast to the natural intelligence displayed by humans and animals. - Wikipedia
Foundations of Knowledge Representation in Artificial Intelligence.pptxkitsenthilkumarcse
Knowledge representation in artificial intelligence (AI) is a fundamental concept that involves the process of structuring and encoding knowledge so that AI systems can understand, reason, and make decisions. Effective knowledge representation is essential for AI systems to model and work with complex real-world information. Here are some key aspects of knowledge representation in AI:
Symbolic Knowledge Representation: This approach uses symbols and rules to represent knowledge. It involves encoding information using symbols, predicates, and logical statements. Common formalisms include first-order logic and propositional logic. Symbolic representation is particularly suited for knowledge-based systems and expert systems.
Semantic Networks: In a semantic network, knowledge is represented using nodes and links to denote relationships between concepts. This form of representation is intuitive and is often used for organizing knowledge in a structured manner.
Frames and Ontologies: Frames and ontologies are used to represent knowledge by structuring information into frames or classes. Frames contain attributes and values, and they help in organizing and categorizing knowledge. Ontologies, such as OWL (Web Ontology Language), provide a more formal representation of knowledge for use in the semantic web and knowledge graphs.
Rule-Based Systems: Rule-based systems use a set of rules to represent and reason with knowledge. These rules can be encoded in the form of "if-then" statements, allowing AI systems to make decisions and draw inferences.
Fuzzy Logic: Fuzzy logic allows for the representation of uncertainty and vagueness in knowledge. It is particularly useful in situations where information is not black and white but falls within degrees of truth.
Bayesian Networks: Bayesian networks represent knowledge using probability distributions and conditional dependencies. They are valuable for modeling uncertain or probabilistic relationships in various domains, such as medical diagnosis and risk analysis.
Connectionist Models: Connectionist models, like neural networks, use distributed representations to encode knowledge. In these models, knowledge is spread across interconnected nodes (neurons), and learning occurs through the adjustment of connection weights. These networks are particularly effective in tasks such as pattern recognition and natural language processing.
Hybrid Approaches: Many AI systems use a combination of different knowledge representation techniques to address the complexities of real-world problems. For instance, combining symbolic representation with connectionist models is a common approach in modern AI.
The choice of knowledge representation method depends on the specific problem domain, the nature of the data, and the requirements of the AI system.
1. “Going on a vacation” tasks longer than “Going for a walk”: A Study of Temporal Commonsense Understanding (EMNLP 19) – MCTACO
2. TORQUE: A Reading Comprehension Dataset of Temporal Ordering Questions (EMNLP 20)
3. Temporal Reasoning on Implicit Events from Distant Supervision (NAACL 21)-TRACIE
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
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.
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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.
Knowledge representation events in Artificial Intelligence.pptx
1. Knowledge representation events in
Artificial Intelligence
KNOWLEDGE REPRESENTATION
1. Events
2. Mental Events and Mental Objects
3. Reasoning Systems for Categories
4. Reasoning with Default Information
Dr.J.SENTHILKUMAR
Assistant Professor
Department of Computer Science and Engineering
KIT-KALAIGNARKARUNANIDHI INSTITUTE OF TECHNOLOGY
2. Partition({Moments,ExtendedIntervals}, Intervals )
i∈Moments ⇔ Duration(i)=Seconds(0) .
• Next we invent a time scale and associate points on that scale with
moments, giving us absolute times.
• The time scale is arbitrary; we measure it in seconds and say that the
moment at midnight (GMT) on January 1, 1900, has time 0.
• The functions Begin and End pick out the earliest and latest moments in an
interval, and the function Time delivers the point on the time scale for a
moment.
• The function Duration gives the difference between the end time and the
start time.
• Interval (i) ⇒ Duration(i)=(Time(End(i)) − Time(Begin(i))) .
• Time(Begin(AD1900))=Seconds(0) .
• Time(Begin(AD2001))=Seconds(3187324800) .
• Time(End(AD2001))=Seconds(3218860800) .
5. • Fluents and objects:
• Physical objects can be viewed as generalized events, in the sense
that a physical object is a chunk of space–time.
• For example, USA can be thought of as an event that began in, say,
1776 as a union of 13 states and is still in progress today as a union of
50.
• We can describe the changing properties of USA using state fluents,
such as Population(USA).
• A property of the USA that changes every four or eight years, barring
mishaps, is its president. One might propose that President(USA) is a
logical term that denotes a different object at different times.
6. •To say that George Washington was president
throughout 1790, we can write
• T(Equals(President(USA), GeorgeWashington ),AD1790) .
• We use the function symbol Equals rather than the standard
logical predicate =, because we cannot have a predicate as
an argument to T, and because the interpretation is not that
GeorgeWashington and President(USA) are logically
identical in 1790;
• logical identity is not something that can change over time.
The identity is between the subevents of each object
• that are defined by the period 1790.
7. • MENTAL EVENTS AND MENTAL OBJECTS
• We begin with the propositional attitudes that an agent can have
toward mental objects: attitudes such as Believes, Knows, Wants,
Intends, and Informs. The difficulty is that these attitudes do not
behave like “normal” predicates.
• For example, suppose we try to assert that Lois knows that Superman
can fly:
• Knows(Lois, CanFly(Superman)) .
• One minor issue with this is that we normally think of
CanFly(Superman) as a sentence, but here it appears as a term. That
issue can be patched up just be reifying CanFly(Superman); making
• (Superman = Clark) ∧ Knows(Lois , CanFly(Superman))|= Knows(Lois,
CanFly(Clark )) .it a fluent.
8. •Modal logic is designed to address this problem.
Regular logic is concerned with a single modality, the
modality of truth, allowing us to express “P is true.”
Modal logic includes special modal operators that take
sentences (rather than terms) as arguments.
•For example, “A knows P” is represented with the
notation KAP, where K is the modal operator for
knowledge.
•It takes two arguments, an agent (written as the
subscript) and a sentence. The syntax of modal logic is
the same as first-order logic, except that sentences
can also be formed with modal operators.
9. •That means that modal logic can be used to reason
about nested knowledge sentences: what one agent
knows about another agent’s knowledge.
•For example, we can say that, even though Lois
doesn’t know whether Superman’s secret identity is
Clark Kent, she does know that Clark knows:
•KLois [KClark Identity(Superman, Clark ) ∨
KClark¬Identity(Superman, Clark )]
10.
11. •In the TOP-LEFT diagram, it is common knowledge
that Superman knows his own identity, and neither he
nor Lois has seen the weather report. So in w0 the
worlds w0 and w2 are accessible to Superman; maybe
rain is predicted, maybe not.
•For Lois all four worlds are accessible from each other;
she doesn’t know anything about the report or if Clark
is Superman. But she does know that Superman
knows whether he is Clark, because in every world that
is accessible to Lois, either Superman knows I, or he
knows ¬I. Lois does not know which is the case, but
either way she knows Superman knows.
12. • In the TOP-RIGHT diagram it is common knowledge that
Lois has seen the weather report. So in w4 she knows rain
is predicted and in w6 she knows rain is not predicted.
Superman does not know the report, but he knows that Lois
knows, because in every world that is accessible to him,
either she knows R or she knows ¬R.
• In the BOTTOM diagram we represent the scenario where it
is common knowledge that Superman knows his identity,
and Lois might or might not have seen the weather report.
We represent this by combining the two top scenarios, and
adding arrows to show that Superman does not know which
scenario actually holds.
13. • Modal logic solves some tricky issues with the interplay of
quantifiers and knowledge.
• The English sentence “Bond knows that someone is a spy” is
ambiguous. The first reading is that there is a particular
someone who Bond knows is a spy; we can write this as
• ∃ x KBondSpy(x) ,
• which in modal logic means that there is an x that, in all
accessible worlds, Bond knows to be a spy. The second
reading is that Bond just knows that there is at least one spy:
• KBond∃ x Spy(x) .
• First, we can say that agents are able to draw deductions; if an
agent knows P and knows that P implies Q, then the agent
knows Q:
14. • REASONING SYSTEMS FOR CATEGORIES:
• designed for organizing and reasoning with categories.
• There are two closely related families of systems: semantic networks
provide graphical aids for visualizing a knowledge base and efficient
algorithms for inferring properties of an object on the basis of its
category membership; and description logics provide a formal
language for constructing and combining category definitions and
efficient algorithms for deciding subset and superset relationships
between categories.
• Semantic networks
• Existential graphs that he called “the logic of the future.” Thus began a
long-running debate between advocates of “logic” and advocates of
“semantic networks.” Unfortunately, the debate obscured the fact that
semantics networks—at least those with well-defined semantics—are a
15. • There are many variants of semantic networks, but all are capable
of representing individual objects, categories of objects, and
relations among objects. A typical graphical notation displays object
or category names in ovals or boxes, and connects them with
labeled links.
• MemberOf link between Mary and FemalePersons , corresponding
to the logical assertion Mary ∈FemalePersons ; similarly, the
SisterOf link between Mary and John corresponds to the assertion
SisterOf (Mary, John).
• We can connect categories using SubsetOf links, and so on. It is
such fun drawing bubbles and arrows that one can get carried
away. For example, we know that persons have female persons as
mothers, so can we draw a HasMother link from Persons to
FemalePersons? The answer is no, because HasMother is a
relation between a person and his or her mother, and categories do
16. • This link asserts that
• ∀x x∈ Persons ⇒ [∀ y HasMother (x, y) ⇒ y ∈ FemalePersons ] .
• We might also want to assert that persons have two legs—that is,
• ∀x x∈ Persons ⇒ Legs(x, 2) .
• The semantic network notation makes it convenient to perform
inheritance reasoning.
17. • Description logics
• The syntax of first-order logic is designed to make it easy to
say things about objects. Description logics are notations
that are designed to make it easier to describe definitions
and properties of categories. Description logic systems
evolved from semantic networks in response to pressure to
formalize what the networks mean while retaining the
emphasis on taxonomic structure as an organizing principle.
• The principal inference tasks for description logics are
subsumption and classification.
• Some systems also include consistency of a category
definition—whether the membership criteria are logically
satisfiable.
18. • The CLASSIC language (Borgida et al., 1989) is a typical
description logic. The syntax of CLASSIC. For example, to
say that bachelors are unmarried adult males we would write
• Bachelor = And(Unmarried, Adult ,Male) .
• The equivalent in first-order logic would be
• Bachelor (x) ⇔ Unmarried(x) ∧ Adult(x) ∧ Male(x) .
• REASONING WITH DEFAULT INFORMATION
• probability theory can certainly provide a conclusion that the
fourth wheel exists with high probability, yet, for most people,
the possibility of the car’s not having four wheels does not
arise unless some new evidence presents itself.
19. • Thus, it seems that the four-wheel conclusion is reached by
default, in the absence of any reason to doubt it.
• If new evidence arrives—for example, if one sees the owner
carrying a wheel and notices that the car is jacked up—then
the conclusion can be retracted.
• This kind of reasoning is said to exhibit nonmonotonicity,
because the set of beliefs does not grow monotonically over
time as new evidence arrives.
• Nonmonotonic logics have been devised with modified
notions of truth and entailment in order to capture such
behavior. We will look at two such logics that have been
studied extensively: circumscription and default logic.