Deep neural networks have shown recent promise in many language-related tasks such as the modelling of
conversations. We extend RNN-based sequence to sequence models to capture the long-range discourse
across many turns of conversation. We perform a sensitivity analysis on how much additional context
affects performance, and provide quantitative and qualitative evidence that these models can capture
discourse relationships across multiple utterances. Our results show how adding an additional RNN layer
for modelling discourse improves the quality of output utterances and providing more of the previous
conversation as input also improves performance. By searching the generated outputs for specific
discourse markers, we show how neural discourse models can exhibit increased coherence and cohesion in
conversations.
Evaluation of subjective answers using glsa enhanced with contextual synonymyijnlc
Evaluation of subjective answers submitted in an exam is an essential but one of the most resource consuming educational activity. This paper details experiments conducted under our project to build a software that evaluates the subjective answers of informative nature in a given knowledge domain. The paper first summarizes the techniques such as Generalized Latent Semantic Analysis (GLSA) and Cosine Similarity that provide basis for the proposed model. The further sections point out the areas of improvement in the previous work and describe our approach towards the solutions of the same. We then discuss the implementation details of the project followed by the findings that show the improvements achieved. Our approach focuses on comprehending the various forms of expressing same entity and thereby capturing the subjectivity of text into objective parameters. The model is tested by evaluating answers submitted by 61 students of Third Year B. Tech. CSE class of Walchand College of Engineering Sangli in a test on Database Engineering.
Deep neural networks have shown recent promise in many language-related tasks such as the modelling of conversations. We extend RNN-based sequence to sequence models to capture the long-range discourse across many turns of conversation. We perform a sensitivity analysis on how much additional context affects performance, and provide quantitative and qualitative evidence that these models can capture discourse relationships across multiple utterances. Our results show how adding an additional RNN layer for modelling discourse improves the quality of output utterances and providing more of the previous conversation as input also improves performance. By searching the generated outputs for specific discourse markers, we show how neural discourse models can exhibit increased coherence and cohesion in conversations.
Semi-global Leaderless Consensus with Input Saturation Constraints via Adapti...IJRES Journal
In this paper, the problems of semi-global leaderless consensus for continuous-time multi-agent
systems under input saturation restraints are investigated. We consider the leaderless consensus problems
under fixed undirected communication topology. New necessary synthesis conditions are established for
achieving semi-global leaderless consensus via the distributed adaptive protocols, which is designed by utilizing
low gain feedback tactics and the relative state measurements of the neighboring agents. Finally, simulation
results illustrate the theoretic developments.
Intelligent Image Enhancement and Restoration - From Prior Driven Model to Ad...Wanjin Yu
ICME2019 Tutorial: Intelligent Image Enhancement and Restoration - From Prior Driven Model to Advanced Deep Learning Part 2: text centric image style transfer
Deep Reinforcement Learning with Distributional Semantic Rewards for Abstract...Deren Lei
Deep reinforcement learning (RL) has been a commonly-used strategy for the abstractive summarization task to address both the exposure bias and non-differentiable task issues. However, the conventional reward ROUGE-L simply looks for exact n-grams matches between candidates and annotated references, which inevitably makes the generated sentences repetitive and incoherent. In this paper, we explore the practicability of utilizing the distributional semantics to measure the matching degrees. Our proposed distributional semantics reward has distinct superiority in capturing the lexical and compositional diversity of natural language.
Deep neural networks have shown recent promise in many language-related tasks such as the modelling of
conversations. We extend RNN-based sequence to sequence models to capture the long-range discourse
across many turns of conversation. We perform a sensitivity analysis on how much additional context
affects performance, and provide quantitative and qualitative evidence that these models can capture
discourse relationships across multiple utterances. Our results show how adding an additional RNN layer
for modelling discourse improves the quality of output utterances and providing more of the previous
conversation as input also improves performance. By searching the generated outputs for specific
discourse markers, we show how neural discourse models can exhibit increased coherence and cohesion in
conversations.
Evaluation of subjective answers using glsa enhanced with contextual synonymyijnlc
Evaluation of subjective answers submitted in an exam is an essential but one of the most resource consuming educational activity. This paper details experiments conducted under our project to build a software that evaluates the subjective answers of informative nature in a given knowledge domain. The paper first summarizes the techniques such as Generalized Latent Semantic Analysis (GLSA) and Cosine Similarity that provide basis for the proposed model. The further sections point out the areas of improvement in the previous work and describe our approach towards the solutions of the same. We then discuss the implementation details of the project followed by the findings that show the improvements achieved. Our approach focuses on comprehending the various forms of expressing same entity and thereby capturing the subjectivity of text into objective parameters. The model is tested by evaluating answers submitted by 61 students of Third Year B. Tech. CSE class of Walchand College of Engineering Sangli in a test on Database Engineering.
Deep neural networks have shown recent promise in many language-related tasks such as the modelling of conversations. We extend RNN-based sequence to sequence models to capture the long-range discourse across many turns of conversation. We perform a sensitivity analysis on how much additional context affects performance, and provide quantitative and qualitative evidence that these models can capture discourse relationships across multiple utterances. Our results show how adding an additional RNN layer for modelling discourse improves the quality of output utterances and providing more of the previous conversation as input also improves performance. By searching the generated outputs for specific discourse markers, we show how neural discourse models can exhibit increased coherence and cohesion in conversations.
Semi-global Leaderless Consensus with Input Saturation Constraints via Adapti...IJRES Journal
In this paper, the problems of semi-global leaderless consensus for continuous-time multi-agent
systems under input saturation restraints are investigated. We consider the leaderless consensus problems
under fixed undirected communication topology. New necessary synthesis conditions are established for
achieving semi-global leaderless consensus via the distributed adaptive protocols, which is designed by utilizing
low gain feedback tactics and the relative state measurements of the neighboring agents. Finally, simulation
results illustrate the theoretic developments.
Intelligent Image Enhancement and Restoration - From Prior Driven Model to Ad...Wanjin Yu
ICME2019 Tutorial: Intelligent Image Enhancement and Restoration - From Prior Driven Model to Advanced Deep Learning Part 2: text centric image style transfer
Deep Reinforcement Learning with Distributional Semantic Rewards for Abstract...Deren Lei
Deep reinforcement learning (RL) has been a commonly-used strategy for the abstractive summarization task to address both the exposure bias and non-differentiable task issues. However, the conventional reward ROUGE-L simply looks for exact n-grams matches between candidates and annotated references, which inevitably makes the generated sentences repetitive and incoherent. In this paper, we explore the practicability of utilizing the distributional semantics to measure the matching degrees. Our proposed distributional semantics reward has distinct superiority in capturing the lexical and compositional diversity of natural language.
About the paper: Development and application of a new steady-hand manipulator...Giovanni Murru
Development and application of a new steady-hand manipulator for retinal surgery
by
Ben Mitchell, John Koo, Iulian Iordachita, Peter Kazanzides, Ankur Kapoor, James Handa, Gregory Hager, Russell Taylor
presented by
Giovanni Murru
About the paper USC CINAPS Builds Bridges Observing and Monitoring the Southe...Giovanni Murru
About the paper
USC CINAPS Builds Bridges Observing and Monitoring the Southern California Bight.
In the presentation we also talk about the importance of robots in response to the BP Oil disaster, also knows as Deepwater Horizon oil spill.
Task Constrained Motion Planning for Snake RobotGiovanni Murru
Presentation of the work I've done during the Mobile Robotics course, about the task constrained motion planning for a snake-like robot with 24 dof, using probabilistic planning RRT to handle the task.
For the full video of this presentation, please visit:
http://www.embedded-vision.com/platinum-members/videantis/embedded-vision-training/videos/pages/may-2015-embedded-vision-summit
For more information about embedded vision, please visit:
http://www.embedded-vision.com
Marco Jacobs, Vice President of Marketing at videantis, presents the "3D from 2D: Theory, Implementation, and Applications of Structure from Motion" tutorial at the May 2015 Embedded Vision Summit.
Structure from motion uses a unique combination of algorithms that extract depth information using a single 2D moving camera. Using a calibrated camera, feature detection, and feature tracking, the algorithms calculate an accurate camera pose and a 3D point cloud representing the surrounding scene.
This 3D scene information can be used in many ways, such as for automated car parking, augmented reality, and positioning. Marco introduces the theory behind structure from motion, provides some representative applications that use it, and explores an efficient implementation for embedded applications.
This PowerPoint was created by Kate Shervais while working at UNAVCO to introduce the concept of Structure from Motion and show the different applications of the methodology.
is a range imaging technique; it refers to the process of estimating three-dimensional structures from two-dimensional image sequences which may be coupled with local motion signals
Диспетчер тегов Google. Меньше затрат, больше контроля.CubeLine Agency
Увеличиваем эффективность и умножаем прибыль при помощи технологичных инструментов.
Диспетчер тегов Google — гибкий и удобный инструмент для оптимизации работы с рекламными кампаниями.
Смотрите видео выступления: http://www.youtube.com/watch?v=v-iONoYInKE
Содержание:
- Зачем нужен GTM?
- Что это такое?
- Основные понятия для работы с диспетчером тегов
- Возможности Google Tag Manager
- Нестандартные аналитические системы
- Контроль, изменение и удаление файлов cookie.
- Управление ремаркетингом.
- Специальная разметка для тегов в GTM
- Как устанавливать и настраивать теги своими силами?
- Плюсы и минусы GTM.
This presentation is a briefing of a paper about Networks and Natural Language Processing. It describes many graph based methods and algorithms that help in syntactic parsing, lexical semantics and other applications.
About the paper: Development and application of a new steady-hand manipulator...Giovanni Murru
Development and application of a new steady-hand manipulator for retinal surgery
by
Ben Mitchell, John Koo, Iulian Iordachita, Peter Kazanzides, Ankur Kapoor, James Handa, Gregory Hager, Russell Taylor
presented by
Giovanni Murru
About the paper USC CINAPS Builds Bridges Observing and Monitoring the Southe...Giovanni Murru
About the paper
USC CINAPS Builds Bridges Observing and Monitoring the Southern California Bight.
In the presentation we also talk about the importance of robots in response to the BP Oil disaster, also knows as Deepwater Horizon oil spill.
Task Constrained Motion Planning for Snake RobotGiovanni Murru
Presentation of the work I've done during the Mobile Robotics course, about the task constrained motion planning for a snake-like robot with 24 dof, using probabilistic planning RRT to handle the task.
For the full video of this presentation, please visit:
http://www.embedded-vision.com/platinum-members/videantis/embedded-vision-training/videos/pages/may-2015-embedded-vision-summit
For more information about embedded vision, please visit:
http://www.embedded-vision.com
Marco Jacobs, Vice President of Marketing at videantis, presents the "3D from 2D: Theory, Implementation, and Applications of Structure from Motion" tutorial at the May 2015 Embedded Vision Summit.
Structure from motion uses a unique combination of algorithms that extract depth information using a single 2D moving camera. Using a calibrated camera, feature detection, and feature tracking, the algorithms calculate an accurate camera pose and a 3D point cloud representing the surrounding scene.
This 3D scene information can be used in many ways, such as for automated car parking, augmented reality, and positioning. Marco introduces the theory behind structure from motion, provides some representative applications that use it, and explores an efficient implementation for embedded applications.
This PowerPoint was created by Kate Shervais while working at UNAVCO to introduce the concept of Structure from Motion and show the different applications of the methodology.
is a range imaging technique; it refers to the process of estimating three-dimensional structures from two-dimensional image sequences which may be coupled with local motion signals
Диспетчер тегов Google. Меньше затрат, больше контроля.CubeLine Agency
Увеличиваем эффективность и умножаем прибыль при помощи технологичных инструментов.
Диспетчер тегов Google — гибкий и удобный инструмент для оптимизации работы с рекламными кампаниями.
Смотрите видео выступления: http://www.youtube.com/watch?v=v-iONoYInKE
Содержание:
- Зачем нужен GTM?
- Что это такое?
- Основные понятия для работы с диспетчером тегов
- Возможности Google Tag Manager
- Нестандартные аналитические системы
- Контроль, изменение и удаление файлов cookie.
- Управление ремаркетингом.
- Специальная разметка для тегов в GTM
- Как устанавливать и настраивать теги своими силами?
- Плюсы и минусы GTM.
This presentation is a briefing of a paper about Networks and Natural Language Processing. It describes many graph based methods and algorithms that help in syntactic parsing, lexical semantics and other applications.
This is a short presentation that explains the famous TextRank papers that used graphs to produce summaries and document indices (keywords).
Link to paper : https://web.eecs.umich.edu/~mihalcea/papers/mihalcea.emnlp04.pdf
Distributed coloring with O(sqrt. log n) bitsSubhajit Sahu
Distributed Coloring with O˜(√log n) Bits
K Kothapalli, M Onus, C Scheideler, C Schindelhauer
Proc. of IEEE International Parallel and Distributed Processing Symposium …
We consider the well-known vertex coloring problem: given a graph G, find a coloring of its vertices so that no two neighbors in G have the same color. It is trivial to see that every graph of maximum degree∆ can be colored with∆+ 1 colors, and distributed algorithms that find a (∆+ 1)-coloring in a logarithmic number of communication rounds, with high probability, are known since more than a decade. This is in general the best possible if only a constant number of bits can be sent along every edge in each round. In fact, we show that for the n-node cycle the bit complexity of the coloring problem is
Ω (log n). More precisely, if only one bit can be sent along each edge in a round, then every distributed coloring algorithm (ie, algorithms in which every node has the same initial state and initially only knows its own edges) needs at least Ω (log n) rounds, with high probability, to color the n–node cycle, for any finite number of colors. But what if the edges have orientations, ie, the endpoints of an edge agree on its orientation (while bits may still flow in both directions)? Edge orientations naturally occur in dynamic networks where new nodes establish connections to old nodes. Does this allow one to provide faster coloring algorithms?
Hierarchical topics in texts generated by a streamkevig
We observe a stream of text messages, generated by Twitter or by a text file
and present a tool which constructs a dynamic list of topics. Each tweet generates edges of
a graph where the nodes are the tags and edges link the author of the tweet with the tags
present in the tweet. We consider the large clusters of the graph and approximate the stream
of edges with a Reservoir sampling. We study the giant components of the Reservoir and each
large component represents a topic. The nodes of high degree and their edges provide the
first layer of a topic, and the iteration over the nodes provide a hierarchical decomposition.
For a standard text, we use a Weighted Reservoir sampling where the weight is the similarity
between words given by Word2vec. We consider dynamic overlapping windows and provide
the topicalization on each window. We compare this approach with the Word2content and LDA techniques in the case of a standard text, viewed as a stream.
Hierarchical topics in texts generated by a streamkevig
We observe a stream of text messages, generated by Twitter or by a text file
and present a tool which constructs a dynamic list of topics. Each tweet generates edges of
a graph where the nodes are the tags and edges link the author of the tweet with the tags
present in the tweet. We consider the large clusters of the graph and approximate the stream
of edges with a Reservoir sampling. We study the giant components of the Reservoir and each
large component represents a topic. The nodes of high degree and their edges provide the
first layer of a topic, and the iteration over the nodes provide a hierarchical decomposition.
For a standard text, we use a Weighted Reservoir sampling where the weight is the similarity
between words given by Word2vec. We consider dynamic overlapping windows and provide
the topicalization on each window. We compare this approach with the Word2content and
LDA techniques in the case of a standard text, viewed as a stream.
THE ABILITY OF WORD EMBEDDINGS TO CAPTURE WORD SIMILARITIESkevig
Distributed language representation has become the most widely used technique for language representation in various natural language processing tasks. Most of the natural language processing models that are based on deep learning techniques use already pre-trained distributed word representations, commonly called word embeddings. Determining the most qualitative word embeddings is of crucial importance for such models. However, selecting the appropriate word embeddings is a perplexing task since the projected embedding space is not intuitive to humans. In this paper, we explore different approaches for creating distributed word representations. We perform an intrinsic evaluation of several state-of-the-art word embedding methods. Their performance on capturing word similarities is analysed with existing benchmark datasets for word pairs similarities. The research in this paper conducts a correlation analysis between ground truth word similarities and similarities obtained by different word embedding methods.
THE ABILITY OF WORD EMBEDDINGS TO CAPTURE WORD SIMILARITIESkevig
Distributed language representation has become the most widely used technique for language representation in various natural language processing tasks. Most of the natural language processing models that are based on deep learning techniques use already pre-trained distributed word representations, commonly called word embeddings. Determining the most qualitative word embeddings is of crucial importance for such models. However, selecting the appropriate word embeddings is a perplexing task since the projected embedding space is not intuitive to humans.In this paper, we explore different approaches for creating distributed word representations. We perform an intrinsic evaluation of several state-of-the-art word embedding methods. Their performance on capturing word similarities is analysed with existing benchmark datasets for word pairs similarities. The research in this paper conducts a correlation analysis between ground truth word similarities and similarities obtained by different word embedding methods.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
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.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
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.
For more technical information, visit our website https://intellaparts.com
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.
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.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
The Benefits and Techniques of Trenchless Pipe Repair.pdf
About the paper: Graph Connectivity Measures for Unsupervised Word Sense Disambiguation
1. + about the paper:
Graph Connectivity
Measures for
UnsupervisedWord
Sense Disambiguation
Giovanni Murru
Mirella Lapata
Seminars in Computational learning
methods for Natural Language Processing
Prof.Roberto Basili
Roberto Navigli Dipartimento di
Informatica
Sapienza
Università di Roma
School of
Informatics
University of
Edinburg
2. +
Abstract
n Development of graph-based unsupervised
algorithms for Word Sense Disambiguation
n Discussion about a variety of measures that
analyze the connectivity of the graph
structures
n Test the performance of these approaches
on standard data sets
3. +
Word Sense Disambiguation
n Word Sense Disambiguation (WSD) is an open research topic
in Natural Language Processing
n Its goal is to identify which sense of a word is intended in a
context, a sentence.
n The sense of the word is selected from a set of predefined
possibilities
n Sense Inventory (Dictionary,Thesaurus)
n Knowledge intensive methods, Supervised Learning
4. +
The essentiality of WSD
n Word Sense Disambiguation is essential for many
applications:
n Machine Translation (e.g. complex translations between natural
languages, achieved with corpus techniques)
n Information Retrieval (Used in Internet)
n Question Answering
n Knowledge Acquisition
n Summarization
5. +
Huge Data Sets
n One of the problems of Word Sense Disambiguation (WSD) is
the necessity to deal with huge data sets, in particular with
the supervised approach.
n While the Supervised Disambiguation is based on a labeled
training set the Unsupervised Disambiguation uses
unlabeled corpora.
n The corpora are large and structured sets of text.
n Supervised approach outperforms the unsupervised one, but
requires large amounts of training data.
6. +
Limitations of Supervised
n The Supervised Disambiguation can obtain reliable results
only with words, whose sense has been labeled.
n These sense tagged corpora are usually created by-hand,
and this is very expensive and requires a lot of work
n Paucity, scarcity of suitable data for many languages and text
genres.
n POSSIBLE SOLUTION?
Unsupervised Disambiguation
7. +
Graph vs Similarity (1/2)
n The Unsupervised method can be generally divided in 2
categories:
1. Graph Based
2. Similarity Base
n No need to label senses à optimal for large scale sense
disambiguation
n Similarity Based algorithms assign a sense to an ambiguous
word by comparing each of its senses with those of the
words surrounding the context.
n The sense with the highest similarity is assumed to be the right
one.
8. +
Graph vs Similarity (2/2)
n The work developed by Navigli and Lapata takes in account
the Graph-Based approach.
n Graph-Based steps:
n Build a graph representing all possible interpretations of the word
sequence that we have to disambiguate.
n Graph nodes à Word meanings
n Graph edges à Semantic relations between these senses
n Estimate the value of each node in order to determine its
importance.
n Sense Disambiguation is about finding the most important
node for each word.
9. +
Building the Graph (1/2)
n In the experiments, Navigli and Lapata used the WordNet
sense inventory.
n For each generic sentence σ they build a graph G
n σ= {w1,w2, … , wn} is a set of words
n The graph G is composed by a set of vertices
Vσ = {v1, v2, … , vn}
n Vσ initially contains, for each word wi that belongs to σ,
the set of senses associated to that particular word in the
WordNet sense inventory.
n The set of the edges E of the graph G is initially empty
10. +
Building the Graph (2/2)
n Let’s say V =Vσ
n For each word sense vi in Vσ, a depth-first search
regarding it in the WordNet graph is performed, and
n everytime a different word vj also contained in Vσ is found
n The semantic relations encountered during the path between vi
and vj are added to the set of edges E
n and the nodes involved in this path (between vi and vj) are
added to the set V of the vertices of the graph G.
n G is hence a representation of the semantic relations
between the words related to the particular sentence that
G represents.
11. +
Why the graph is built?
n G is a subgraph of the WordNet, whose vertices and
relations are reasonably useful for the WSD problem
n Remember:
n The aim of WSD is to find the most appropriate sense for each
word that belongs to the sentence σ.
n This is determined by ranking each vertex in the graph
G, according to its importance.
n How can we achieve this ranking?
How can we measure the relevance of a word sense?
n CONNECTIVITY MEASURES
12. +
Connectivity Measures (1/2)
n They are used to rank the nodes in order to select the most
plausible meaning.
n Connectivity measures can be of two types
n LOCAL
n GLOBAL
n While global measures estimate the connectivity of the
entire structure of the graph, the local measures capture the
degree of connectivity related to a single vertex in the graph.
13. +
Connectivity Measures (2/2)
n Assume to work with undirected graphs
n The researchers motivated this choice because semantic
relations often have a counterpart, like in the case of hypernymy
and hyponymy (IS-A)
n e.g. RED
n Hypernymy: something that red is a kind of (e.g. chromatic color)
n Hyponymy: something that is a kind of red (e.g. scarlet)
n They define a distance function d as the length of the shortest
path between two nodes
n In the case these two nodes are disconnected, d = K, where K is
the number of the graph’s nodes.
14. +
Local Measures (1/2)
n Local measures used in the experiments are:
n In-degree centrality
n Normalized number of edges terminating in a vertex
n Betweenness centrality
n The normalized fraction of shortest paths between node pairs
that pass through a vertex
n Key Player Problem (KPP)
n The normalized sum of the inverse of the distances between
the vertex and the remaining nodes of the graph
KPP(v) =
1
d(u,v)u∈S,v∈T
∑
V −1
15. +
Local Measures (2/2)
n The researchers also used the local measures:
n HITS and PageRank
n Link analysis algorithms that are normally used to rate web
pages, but can also be applied in the graph theory because
of the particular structure of the web.
n Maximum Flow
n Maximum s-t flow: number of independent paths between a
pair of vertices contained in the same partition of s and t
respectively.
n Evaluates the flow towards a vertex v, as a measure of the
sum of the maximum flows having v as a sink and the other
vertices of the graph as source.
16. +
Global Measures (1/2)
n They characterize the overall graph structure, thus they are
not particularly helpful in selecting a unique sense for
ambiguous words
n Navigli and Lapata used these 3 well-known Global
Measures in their experiments:
n Compactness
n High value à vertices are connected with small distances, the
graph is compact
n Low value à vertices are disconnected or connected with big
distances.
17. +
Global Measures (2/2)
n Graph Entropy
n Low value = few vertices are important
n High value = vertices are almost equally important
n Edge Density
n Is computed as the ratio between the number of edges in a graph
and the number of edges of a complete graph with the same
number of nodes.
18. +
Experiments
n The experiments organized by Navigli and Lapata used a
sentence-by-sentence disambiguation approach in order
to evaluate the lately explained measures.
n They built a graph for each sentence, ranked the nodes using
the measures, and selected the most appropriate meanings.
n They tested their algorithm using two different sense
inventories:
n WordNet 2.0
n An extended version of WordNet created by Navigli, adding
semantic edges (~ 60.000) extracted from collocation resources
(e.g Oxford Collocation, etc), that in particular defines
restrictions on how words can be used together:
n e.g. strong tea is ok, powerful tea is not
19. +
Experiments
n Two data standard sets
n SemCor Corpus
n subset of Brown Corpus
n 200,000 words manually tagged with WordNet senses
n Senseval-3 English all word
n subset of Penn TreeBank Corpus
n 2,081 words manually tagged with WordNet senses
n All the connectivity measures tested with SemCor.
n The best performing with SemCor, was tested with Senseval-3
too.
n Comparison between the graph-based algorithm developed
by the researchers and a naïve criterion that randomly selects
a sense for each word
20. +
The tests’ results (1/4)
n The tests were made using words with more than one
WordNet sense (polysemous).
n They used a chi-square test, a common statistical test.
LEGEND:
Prec: Precision,
measure of exactness
Rec: Recall, measure
of completeness
F1: mean between
Precision and Recall
F1 = 2 •
PREC • REC
PREC + REC
21. +
The tests’ results (2/4)
n PageRank better than HITS: maybe because of the random
surfer model, researcher stated.
n The best performing local measure is KPP with a F1=31.8%
or F1=40.5% using WordNet or EnWordNet respectively.
n The best performing global measure is Graph Entropy with a
F1=29.4% (WordNet) and F1=30.5% (ExtWordNet)
§ EnWordNet performs better than
WordNet:
• The existence of a denser
lexicon with large number of
semantic relations enhance
the measures.
22. +
The tests’ results (3/4)
n Since KPP was the best performing algorithm in SemCor, the
researcher tested the behavior of this particular algorithm
with SensVal-3 too, using the Enriched version of WordNet.
n And they compare it with the actually best unsupervised
system, based on a domain driven disambiguation.
23. +
The tests’ results (4/4)
n IRST-DDD compares the domain of the context surrounding
the target word with the domain of its senses and uses a
version of WordNet augmented with the use of domain
labels (e.g. economy, geography).
n KPP comparable to IRST-DDD for nouns and adjectives, but
worst for verbs.
n This can be explained as a lack of sentence relations (related
to verbs) in the enriched WordNet used for the tests.
24. +
Summary
n Navigli and Lapata presented a study of graph connectivity
measures for unsupervised WSD.
n A large number of local and global measures has been
evaluated.
n Local measures perform better than Global ones.
n KPP is better than other connectivity measures at identifying
which node in the graph is maximally connected to the
others (same results also in social network analysis).
n If the enrichment of WordNet is increased PageRank and
InDegree are comparable to KPP in terms of performance.