Convolutional Neural Networks : Popular Architecturesananth
In this presentation we look at some of the popular architectures, such as ResNet, that have been successfully used for a variety of applications. Starting from the AlexNet and VGG that showed that the deep learning architectures can deliver unprecedented accuracies for Image classification and localization tasks, we review other recent architectures such as ResNet, GoogleNet (Inception) and the more recent SENet that have won ImageNet competitions.
This presentation is intended for giving an introduction to Genetic Algorithm. Using an example, it explains the different concepts used in Genetic Algorithm. If you are new to GA or want to refresh concepts , then it is a good resource for you.
The GENETIC ALGORITHM is a model of machine learning which derives its behavior from a metaphor of the processes of EVOLUTION in nature. Genetic Algorithm (GA) is a search heuristic that mimics the process of natural selection. This heuristic (also sometimes called a metaheuristic) is routinely used to generate useful solutions to optimization and search problems.
Genetic Algorithm (GA) is a search-based optimization technique based on the principles of Genetics and Natural Selection. It is frequently used to find optimal or near-optimal solutions to difficult problems which otherwise would take a lifetime to solve. It is frequently used to solve optimization problems, in research, and in machine learning.
Genetic algorithms are optimization techniques inspired by Darwin's theory of evolution. They use operations like selection, crossover and mutation to evolve solutions to problems by iteratively trying random variations. The document outlines the history, concepts, process and applications of genetic algorithms, including using them to optimize engineering design, routing, computer games and more. It describes how genetic algorithms encode potential solutions and use fitness functions to guide the evolution toward better outcomes.
This document provides an introduction to genetic algorithms. It discusses how genetic algorithms are inspired by Darwinian evolution and natural selection. The key components of a genetic algorithm are described as follows:
1) A genetic algorithm starts with a population of random solutions called chromosomes.
2) Genetic operators such as selection, crossover and mutation are applied to generate a new population of solutions. Selection favors the fittest solutions based on a fitness function. Crossover combines parts of different solutions, while mutation introduces random changes.
3) The algorithm iterates, applying the genetic operators to successive generations, until an optimal solution emerges or a stopping criteria is met. Genetic algorithms can find multiple optimal solutions and do not require additional information beyond the fitness
The document summarizes the artificial bee colony (ABC) algorithm, which was introduced in 2005 and is inspired by the foraging behavior of honeybee swarms. The ABC algorithm simulates three groups of bees - employed bees, onlookers, and scouts - to solve optimization problems. It involves phases of employed bee search, onlooker bee choice, and scout bee recruitment to balance exploration and exploitation. The ABC algorithm has few parameters and fast convergence but is limited by its initial solutions. Variations include multi-objective ABC algorithms and parameter studies on swarm size, limit, and dimension.
Convolutional Neural Networks : Popular Architecturesananth
In this presentation we look at some of the popular architectures, such as ResNet, that have been successfully used for a variety of applications. Starting from the AlexNet and VGG that showed that the deep learning architectures can deliver unprecedented accuracies for Image classification and localization tasks, we review other recent architectures such as ResNet, GoogleNet (Inception) and the more recent SENet that have won ImageNet competitions.
This presentation is intended for giving an introduction to Genetic Algorithm. Using an example, it explains the different concepts used in Genetic Algorithm. If you are new to GA or want to refresh concepts , then it is a good resource for you.
The GENETIC ALGORITHM is a model of machine learning which derives its behavior from a metaphor of the processes of EVOLUTION in nature. Genetic Algorithm (GA) is a search heuristic that mimics the process of natural selection. This heuristic (also sometimes called a metaheuristic) is routinely used to generate useful solutions to optimization and search problems.
Genetic Algorithm (GA) is a search-based optimization technique based on the principles of Genetics and Natural Selection. It is frequently used to find optimal or near-optimal solutions to difficult problems which otherwise would take a lifetime to solve. It is frequently used to solve optimization problems, in research, and in machine learning.
Genetic algorithms are optimization techniques inspired by Darwin's theory of evolution. They use operations like selection, crossover and mutation to evolve solutions to problems by iteratively trying random variations. The document outlines the history, concepts, process and applications of genetic algorithms, including using them to optimize engineering design, routing, computer games and more. It describes how genetic algorithms encode potential solutions and use fitness functions to guide the evolution toward better outcomes.
This document provides an introduction to genetic algorithms. It discusses how genetic algorithms are inspired by Darwinian evolution and natural selection. The key components of a genetic algorithm are described as follows:
1) A genetic algorithm starts with a population of random solutions called chromosomes.
2) Genetic operators such as selection, crossover and mutation are applied to generate a new population of solutions. Selection favors the fittest solutions based on a fitness function. Crossover combines parts of different solutions, while mutation introduces random changes.
3) The algorithm iterates, applying the genetic operators to successive generations, until an optimal solution emerges or a stopping criteria is met. Genetic algorithms can find multiple optimal solutions and do not require additional information beyond the fitness
The document summarizes the artificial bee colony (ABC) algorithm, which was introduced in 2005 and is inspired by the foraging behavior of honeybee swarms. The ABC algorithm simulates three groups of bees - employed bees, onlookers, and scouts - to solve optimization problems. It involves phases of employed bee search, onlooker bee choice, and scout bee recruitment to balance exploration and exploitation. The ABC algorithm has few parameters and fast convergence but is limited by its initial solutions. Variations include multi-objective ABC algorithms and parameter studies on swarm size, limit, and dimension.
This document discusses several machine learning algorithms and concepts:
KNN is a algorithm that uses Euclidean distance to determine the number of nearest neighbors based on the number of samples in the data. SVM and KNN both use Euclidean distance. Bayes' theorem is a formula for calculating conditional probability based on likelihood, prior probability, and posterior probability. An example shows how to apply Bayes' theorem to calculate the probability of a new data point being "Yes" given existing sample data.
This document provides an overview of genetic algorithms. It discusses how genetic algorithms are inspired by natural evolution and use techniques like selection, crossover, and mutation to arrive at optimal solutions. The document covers the history of genetic algorithms, how they work, examples of using genetic algorithms to optimize problems, and their applications in fields like electromagnetism. Genetic algorithms provide a way to find optimal solutions to complex problems by simulating the natural evolutionary process of reproduction, mutation, and selection of offspring.
This document provides an overview of convolutional neural networks (CNNs). It describes that CNNs are a type of deep learning model used in computer vision tasks. The key components of a CNN include convolutional layers that extract features, pooling layers that reduce spatial size, and fully-connected layers at the end for classification. Convolutional layers apply learnable filters in a local receptive field, while pooling layers perform downsampling. The document outlines common CNN architectures, such as types of layers, hyperparameters like stride and padding, and provides examples to illustrate how CNNs work.
This document discusses genetic algorithms and provides an overview of their key concepts and components. It describes how genetic algorithms are inspired by Darwinian evolution and use techniques like selection, crossover and mutation to evolve solutions to optimization problems. It also outlines various parameters and strategies used in genetic algorithms, including chromosome representation, population size, selection methods, and termination criteria. A wide range of applications are mentioned where genetic algorithms have been applied successfully.
This document provides an introduction to genetic algorithms. It describes genetic algorithms as probabilistic optimization algorithms inspired by biological evolution, using concepts like natural selection and genetic inheritance. The key components of a genetic algorithm are described, including encoding solutions, initializing a population, selecting parents, applying genetic operators like crossover and mutation, evaluating fitness, and establishing termination criteria. An example problem of maximizing binary string ones is used to illustrate how a genetic algorithm works over multiple generations.
The document discusses image denoising techniques based on partial differential equations (PDEs). It begins by defining image noise and describing conventional denoising filters like averaging and median filters. It then focuses on diffusion-based denoising methods, particularly the influential 1987 work of Perona and Malik which introduced nonlinear anisotropic diffusion. Their approach uses an edge-stopping function to reduce diffusion near edges. The document outlines linear and nonlinear diffusion models, conditions for the diffusion coefficient function, and extensions of the Perona-Malik model. It summarizes a 2014 paper proposing a robust anisotropic diffusion scheme using novel variants of the edge-stopping function and diffusivity parameter computation.
Feature pyramid networks for object detection heedaeKwon
This document discusses feature pyramid networks for object detection. It introduces feature pyramid networks which use a bottom-up pathway to generate feature maps at multiple scales from a convolutional neural network and a top-down pathway that combines high-level and low-level semantic information. It then describes applying feature pyramid networks to region proposal networks and Fast/Faster R-CNN models for object detection and presents experimental results on using feature pyramid networks for region proposal and object detection.
Generative Adversarial Networks (GANs) are a type of deep learning model used for unsupervised machine learning tasks like image generation. GANs work by having two neural networks, a generator and discriminator, compete against each other. The generator creates synthetic images and the discriminator tries to distinguish real images from fake ones. This allows the generator to improve over time at creating more realistic images that can fool the discriminator. The document discusses the intuition behind GANs, provides a PyTorch implementation example, and describes variants like DCGAN, LSGAN, and semi-supervised GANs.
In this presentation we discuss the convolution operation, the architecture of a convolution neural network, different layers such as pooling etc. This presentation draws heavily from A Karpathy's Stanford Course CS 231n
Presentation is about genetic algorithms. Also it includes introduction to soft computing and hard computing. Hope it serves the purpose and be useful for reference.
Support vector machines (SVM) are a type of supervised machine learning model that constructs hyperplanes to classify data. Least squares support vector machines (LS-SVM) are a variation of SVM that uses equality constraints instead of inequality constraints, solving a system of linear equations instead of a quadratic programming problem. LS-SVM tends to be more suitable than standard SVM for inseparable data and produces solutions that lack the sparseness of SVM.
Convolutional neural networks (CNNs) are a type of neural network used for image recognition tasks. CNNs use convolutional layers that apply filters to input images to extract features, followed by pooling layers that reduce the dimensionality. The extracted features are then fed into fully connected layers for classification. CNNs are inspired by biological processes and are well-suited for computer vision tasks like image classification, detection, and segmentation.
The document provides an overview of convolutional neural networks (CNNs) presented by Junho Cho. It discusses the basic components of CNNs including convolution, pooling, rectified linear units (ReLU), and fully connected layers. It also reviews popular CNN architectures such as LeNet, AlexNet, VGGNet, GoogLeNet, and ResNet. The document emphasizes that CNNs are powerful due to their ability to learn local invariance through the use of convolutional filters and sharing weights, while also having fewer parameters than fully connected networks to prevent overfitting. Finally, it provides code examples for implementing CNN models in TensorFlow.
This presentation displays the applications of CNNs, a quick review about Neural Networks and their drawbacks, the convolution process, padding, striding, convolution over volume, types of layers in CNN, max pool layer, fully connected layer, and lastly the famous CNNs, LetNet-5, AlexNet, VGG-16, ResNet and GoogLeNet.
Unsupervised learning representation with Deep Convolutional Generative Adversarial Network, Paper by Alec Radford, Luke Metz, and Soumith Chintala
(indico Research, Facebook AI Research).
This document discusses building a camera in a computer program. It describes creating a camera class that can control camera movements through functions like set(), slide(), and roll(). The camera's position can be set using a model-view matrix and functions like lookAt() that specify the eye, look, and up vectors. Other viewing APIs can also be used to manipulate the camera.
The document describes ant colony optimization, which is an algorithm inspired by the behavior of ants. It was initially proposed by Marco Dorigo in 1992 to solve optimization problems. The algorithm is based on the observation that ants deposit pheromone trails and tend to follow paths with higher pheromone levels. In the algorithm, "ant agents" probabilistically construct solutions, with the probability of choosing a solution component influenced by pheromone levels. Over time, this process converges towards good solutions as components of better solutions get stronger pheromone levels reinforcing them. The document outlines the history, analogy to ant behavior, algorithms used, and applications.
This document provides an overview of kernel methods and Gaussian processes. It discusses dual representations, constructing kernels such as polynomial and radial basis function kernels. It also covers Gaussian processes for regression and classification, including learning hyperparameters, automatic relevance determination, and using the Laplace approximation. The document contains section headings and mathematical equations but no complete paragraphs of text.
Dijkstra's algorithm is a graph search algorithm that finds the shortest paths between nodes in a graph. It was developed by computer scientist Edsger Dijkstra in 1956. The algorithm works by assigning tentative distances to nodes in the graph and updating them until it determines the shortest path from the starting node to all other nodes. It can be used to find optimal routes between locations on a map by treating locations as nodes and distances between them as edge costs. ArcGIS Network Analysis software uses Dijkstra's algorithm to solve network problems like finding the lowest cost route, service areas, and closest facilities.
Genetic algorithms are a type of optimization algorithm inspired by biological evolution. They use techniques like mutation, crossover and selection to evolve solutions to problems by starting with a set of potential solutions and using Darwinian principles of natural selection and survival of the fittest to produce better and better approximations over time. Genetic algorithms are commonly used to generate high-quality solutions to optimization and search problems by relying on bio-inspired operators like mutation, crossover and selection.
This document discusses several machine learning algorithms and concepts:
KNN is a algorithm that uses Euclidean distance to determine the number of nearest neighbors based on the number of samples in the data. SVM and KNN both use Euclidean distance. Bayes' theorem is a formula for calculating conditional probability based on likelihood, prior probability, and posterior probability. An example shows how to apply Bayes' theorem to calculate the probability of a new data point being "Yes" given existing sample data.
This document provides an overview of genetic algorithms. It discusses how genetic algorithms are inspired by natural evolution and use techniques like selection, crossover, and mutation to arrive at optimal solutions. The document covers the history of genetic algorithms, how they work, examples of using genetic algorithms to optimize problems, and their applications in fields like electromagnetism. Genetic algorithms provide a way to find optimal solutions to complex problems by simulating the natural evolutionary process of reproduction, mutation, and selection of offspring.
This document provides an overview of convolutional neural networks (CNNs). It describes that CNNs are a type of deep learning model used in computer vision tasks. The key components of a CNN include convolutional layers that extract features, pooling layers that reduce spatial size, and fully-connected layers at the end for classification. Convolutional layers apply learnable filters in a local receptive field, while pooling layers perform downsampling. The document outlines common CNN architectures, such as types of layers, hyperparameters like stride and padding, and provides examples to illustrate how CNNs work.
This document discusses genetic algorithms and provides an overview of their key concepts and components. It describes how genetic algorithms are inspired by Darwinian evolution and use techniques like selection, crossover and mutation to evolve solutions to optimization problems. It also outlines various parameters and strategies used in genetic algorithms, including chromosome representation, population size, selection methods, and termination criteria. A wide range of applications are mentioned where genetic algorithms have been applied successfully.
This document provides an introduction to genetic algorithms. It describes genetic algorithms as probabilistic optimization algorithms inspired by biological evolution, using concepts like natural selection and genetic inheritance. The key components of a genetic algorithm are described, including encoding solutions, initializing a population, selecting parents, applying genetic operators like crossover and mutation, evaluating fitness, and establishing termination criteria. An example problem of maximizing binary string ones is used to illustrate how a genetic algorithm works over multiple generations.
The document discusses image denoising techniques based on partial differential equations (PDEs). It begins by defining image noise and describing conventional denoising filters like averaging and median filters. It then focuses on diffusion-based denoising methods, particularly the influential 1987 work of Perona and Malik which introduced nonlinear anisotropic diffusion. Their approach uses an edge-stopping function to reduce diffusion near edges. The document outlines linear and nonlinear diffusion models, conditions for the diffusion coefficient function, and extensions of the Perona-Malik model. It summarizes a 2014 paper proposing a robust anisotropic diffusion scheme using novel variants of the edge-stopping function and diffusivity parameter computation.
Feature pyramid networks for object detection heedaeKwon
This document discusses feature pyramid networks for object detection. It introduces feature pyramid networks which use a bottom-up pathway to generate feature maps at multiple scales from a convolutional neural network and a top-down pathway that combines high-level and low-level semantic information. It then describes applying feature pyramid networks to region proposal networks and Fast/Faster R-CNN models for object detection and presents experimental results on using feature pyramid networks for region proposal and object detection.
Generative Adversarial Networks (GANs) are a type of deep learning model used for unsupervised machine learning tasks like image generation. GANs work by having two neural networks, a generator and discriminator, compete against each other. The generator creates synthetic images and the discriminator tries to distinguish real images from fake ones. This allows the generator to improve over time at creating more realistic images that can fool the discriminator. The document discusses the intuition behind GANs, provides a PyTorch implementation example, and describes variants like DCGAN, LSGAN, and semi-supervised GANs.
In this presentation we discuss the convolution operation, the architecture of a convolution neural network, different layers such as pooling etc. This presentation draws heavily from A Karpathy's Stanford Course CS 231n
Presentation is about genetic algorithms. Also it includes introduction to soft computing and hard computing. Hope it serves the purpose and be useful for reference.
Support vector machines (SVM) are a type of supervised machine learning model that constructs hyperplanes to classify data. Least squares support vector machines (LS-SVM) are a variation of SVM that uses equality constraints instead of inequality constraints, solving a system of linear equations instead of a quadratic programming problem. LS-SVM tends to be more suitable than standard SVM for inseparable data and produces solutions that lack the sparseness of SVM.
Convolutional neural networks (CNNs) are a type of neural network used for image recognition tasks. CNNs use convolutional layers that apply filters to input images to extract features, followed by pooling layers that reduce the dimensionality. The extracted features are then fed into fully connected layers for classification. CNNs are inspired by biological processes and are well-suited for computer vision tasks like image classification, detection, and segmentation.
The document provides an overview of convolutional neural networks (CNNs) presented by Junho Cho. It discusses the basic components of CNNs including convolution, pooling, rectified linear units (ReLU), and fully connected layers. It also reviews popular CNN architectures such as LeNet, AlexNet, VGGNet, GoogLeNet, and ResNet. The document emphasizes that CNNs are powerful due to their ability to learn local invariance through the use of convolutional filters and sharing weights, while also having fewer parameters than fully connected networks to prevent overfitting. Finally, it provides code examples for implementing CNN models in TensorFlow.
This presentation displays the applications of CNNs, a quick review about Neural Networks and their drawbacks, the convolution process, padding, striding, convolution over volume, types of layers in CNN, max pool layer, fully connected layer, and lastly the famous CNNs, LetNet-5, AlexNet, VGG-16, ResNet and GoogLeNet.
Unsupervised learning representation with Deep Convolutional Generative Adversarial Network, Paper by Alec Radford, Luke Metz, and Soumith Chintala
(indico Research, Facebook AI Research).
This document discusses building a camera in a computer program. It describes creating a camera class that can control camera movements through functions like set(), slide(), and roll(). The camera's position can be set using a model-view matrix and functions like lookAt() that specify the eye, look, and up vectors. Other viewing APIs can also be used to manipulate the camera.
The document describes ant colony optimization, which is an algorithm inspired by the behavior of ants. It was initially proposed by Marco Dorigo in 1992 to solve optimization problems. The algorithm is based on the observation that ants deposit pheromone trails and tend to follow paths with higher pheromone levels. In the algorithm, "ant agents" probabilistically construct solutions, with the probability of choosing a solution component influenced by pheromone levels. Over time, this process converges towards good solutions as components of better solutions get stronger pheromone levels reinforcing them. The document outlines the history, analogy to ant behavior, algorithms used, and applications.
This document provides an overview of kernel methods and Gaussian processes. It discusses dual representations, constructing kernels such as polynomial and radial basis function kernels. It also covers Gaussian processes for regression and classification, including learning hyperparameters, automatic relevance determination, and using the Laplace approximation. The document contains section headings and mathematical equations but no complete paragraphs of text.
Dijkstra's algorithm is a graph search algorithm that finds the shortest paths between nodes in a graph. It was developed by computer scientist Edsger Dijkstra in 1956. The algorithm works by assigning tentative distances to nodes in the graph and updating them until it determines the shortest path from the starting node to all other nodes. It can be used to find optimal routes between locations on a map by treating locations as nodes and distances between them as edge costs. ArcGIS Network Analysis software uses Dijkstra's algorithm to solve network problems like finding the lowest cost route, service areas, and closest facilities.
Genetic algorithms are a type of optimization algorithm inspired by biological evolution. They use techniques like mutation, crossover and selection to evolve solutions to problems by starting with a set of potential solutions and using Darwinian principles of natural selection and survival of the fittest to produce better and better approximations over time. Genetic algorithms are commonly used to generate high-quality solutions to optimization and search problems by relying on bio-inspired operators like mutation, crossover and selection.
Knowledge Based Genetic Algorithm for Robot Path PlanningTarundeep Dhot
This document summarizes a research paper that proposes a knowledge-based genetic algorithm for mobile robot path planning. The algorithm uses a grid-based representation and specialized genetic operators informed by domain knowledge. Simulation results show the algorithm can find optimal or near-optimal paths in static and dynamic environments. Comparisons demonstrate the specialized operators improve GA performance over standard operators. Future work could better utilize domain knowledge and handle changes in dynamic environments.
The document discusses several algorithms for finding the shortest path in a graph: Dijkstra's algorithm, Floyd-Warshall algorithm, Bellman-Ford algorithm, and genetic algorithms. It provides details on how Dijkstra's and Floyd-Warshall algorithms work, including pseudocode. Examples are given for both algorithms. Applications of the different algorithms are also outlined.
Dijkstra's algorithm is used to find the shortest paths from a source node to all other nodes in a network. It works by marking all nodes as tentative with initial distances from the source set to 0 and others to infinity. It then extracts the closest node, adds it to the shortest path tree, and relaxes distances of its neighbors. This process repeats until all nodes are processed. When applied to the example network, Dijkstra's algorithm finds the shortest path from node A to all others to be A-B=4, A-C=6, A-D=8, A-E=7, A-F=7, A-G=7, and A-H=9.
The document discusses various path planning techniques for mobile robots to navigate between a starting point and destination while avoiding collisions. It describes methods like visibility graphs, roadmaps, cell decomposition, and potential fields. It also covers implementing techniques like breadth-first search on visibility graphs and optimizing robot trajectories using factors like travel time, distance and sensor information.
- Embedded systems now contain sensitive personal data and perform safety-critical functions in devices like mobile phones, cars, and medical equipment. Unless embedded system security is adequately addressed, it could impede adoption.
- There are many challenges to security in embedded systems and IoT devices, including vulnerabilities in hardware, software, and networks. Effective security requires building security in at all stages of the design process.
- Various attacks like physical intrusion, side channel attacks, software exploits, and denial of service attacks threaten embedded systems. Countering these threats requires mechanisms at different levels including prevention, detection, and recovery techniques applied in hardware, software, and networks.
Machine learning and data mining are closely related. Data mining involves analyzing data to discover patterns and extract knowledge. Common techniques for data mining include association, sequence analysis, classification, clustering, and forecasting. Data mining can be predictive, descriptive, or both. Most data mining methods use statistical methods and are sophisticated enough to be considered machine learning. Machine learning involves programs that can adapt based on experience. Machine learning can be supervised, using labeled training data, or unsupervised, to discover patterns without labels. Common machine learning methods include hidden Markov models, clustering, decision trees, neural networks, genetic algorithms, support vector machines, and simulated annealing.
This document discusses virtual screening and molecular docking techniques used in drug discovery. It notes that virtual screening involves creating a large virtual library that is screened using docking programs to select the most active compounds for laboratory testing. Molecular docking requires knowledge of the 3D structure of the target protein binding site and involves placing flexible ligand molecules into the target's active site to investigate binding interactions and detect new binding pockets in a cost-effective and time-saving approach compared to laboratory high-throughput screening.
The document discusses genetic algorithms and genetic programming in Python. It describes how genetic algorithms are inspired by natural selection and genetics, using techniques like selection, crossover, and mutation to evolve solutions to problems. It provides examples of using the Python library PyEvolve to implement genetic algorithms and genetic programming to solve problems like minimizing test functions and forecasting temperatures.
This document summarizes a student's final seminar project on developing a novel all-pairs shortest path (APSP) algorithm and applying it in a multi-domain SDN. The student first discusses challenges with the current Internet architecture and how SDN aims to address them. They then review existing APSP algorithms and issues with graph decomposition and SDN security. The student proposes a new graph decomposition technique and algorithms to securely encrypt network paths. Their methodology involves decomposing the graph, finding peripheral vertices, and applying Dijkstra's and Floyd-Warshall algorithms. Analysis shows the approach runs in O(|V|δ) time and O(|V|l + |V|δ2l) space
Solving the traveling salesman problem by genetic algorithmAlex Bidanets
The document discusses the traveling salesman problem and genetic algorithms. The traveling salesman problem involves finding the shortest route to visit each city on a list only once and return to the origin city. Genetic algorithms provide a method to solve optimization problems like the traveling salesman problem. Genetic algorithms work by initializing a population of solutions and using operators like crossover and mutation to generate new populations, selecting the fittest solutions to reproduce until a condition is met. The genetic algorithm approach allows the traveling salesman problem to be solved effectively without prior knowledge of the problem.
The document proposes a new method for efficiently finding the top-k shortest simple paths between two nodes in a graph. It precomputes shortest path trees, transforms the graph, and uses optimizations like k-reduction and adaptive thresholds to terminate path searches early. Experimental results on real and synthetic graphs show the method outperforms prior algorithms by Yen and Hershberger for discovering top-k shortest paths.
This document proposes using a modified genetic algorithm to optimize shortest path problems in network routing. The algorithm randomly generates initial router positions and routes. It then calculates a distance cost matrix and evaluates the fitness of routes by computing their minimum costs. The algorithm performs selection, crossover, and mutation over multiple generations to converge on the global minimum cost routes. Experimental results showed the genetic algorithm approach finds solutions in a reasonable time frame and achieves the shortest paths compared to traditional shortest path algorithms for large networks.
JavaScript is a scripting language originally designed for web browsers but now used everywhere. It has dynamic typing and supports object-oriented, imperative, and functional programming. JavaScript was created in 1995 and standardized in 1999. It is now the most popular language on GitHub. JavaScript can be used to build interactive web pages, desktop applications, server-side applications, IoT applications, and real-time applications. The core data types in JavaScript are Number, String, Boolean, Object, Function, Array, Date, and Regular Expressions. JavaScript supports features like variables, flow control, error handling, debugging, and JSON for data exchange.
Genetic algorithms are an optimization technique that uses processes inspired by biological evolution such as inheritance, mutation, selection, and crossover. This document provides examples of how genetic algorithms work and concludes with summarizing the key aspects of genetic algorithms.
Dijkstra's algorithm is a solution to the single-source shortest path problem in graph theory. It finds the shortest paths from a source vertex to all other vertices in a weighted graph where all edge weights are non-negative. The algorithm uses a greedy approach, maintaining a set of vertices whose final shortest path from the source vertex has already been determined.
Travelling salesman problem using genetic algorithms Shivank Shah
This document describes using a genetic algorithm to solve the traveling salesman problem. It defines the traveling salesman problem as finding the shortest route for a salesman to visit each city once and return to their starting city. The method uses a genetic algorithm with operations like generating a random initial population, calculating fitness, selection for crossover using probabilities, crossover using techniques like PMX, and mutation techniques like swapping or flipping parts of routes. The goal is to evolve routes with shorter distances over multiple generations to minimize the total travel distance.
The document discusses routing and routing protocols. It defines routing as the process routers use to forward packets toward their destination network based on the destination IP address. It describes static routing, where network administrators manually configure routes, as well as dynamic routing protocols, where routers automatically share information to build and update routing tables. It outlines common routing protocols including RIP, IGRP, EIGRP, OSPF, and BGP and their key characteristics such as the metrics and timers they use.
L'IA connaît une croissance rapide et son intégration dans le domaine éducatif soulève de nombreuses questions. Aujourd'hui, nous explorerons comment les étudiants utilisent l'IA, les perceptions des enseignants à ce sujet, et les mesures possibles pour encadrer ces usages.
Constat Actuel
L'IA est de plus en plus présente dans notre quotidien, y compris dans l'éducation. Certaines universités, comme Science Po en janvier 2023, ont interdit l'utilisation de l'IA, tandis que d'autres, comme l'Université de Prague, la considèrent comme du plagiat. Cette diversité de positions souligne la nécessité urgente d'une réponse institutionnelle pour encadrer ces usages et prévenir les risques de triche et de plagiat.
Enquête Nationale
Pour mieux comprendre ces dynamiques, une enquête nationale intitulée "L'IA dans l'enseignement" a été réalisée. Les auteurs de cette enquête sont Le Sphynx (sondage) et Compilatio (fraude académique). Elle a été diffusée dans les universités de Lyon et d'Aix-Marseille entre le 21 juin et le 15 août 2023, touchant 1242 enseignants et 4443 étudiants. Les questionnaires, conçus pour étudier les usages de l'IA et les représentations de ces usages, abordaient des thèmes comme les craintes, les opportunités et l'acceptabilité.
Résultats de l'Enquête
Les résultats montrent que 55 % des étudiants utilisent l'IA de manière occasionnelle ou fréquente, contre 34 % des enseignants. Cependant, 88 % des enseignants pensent que leurs étudiants utilisent l'IA, ce qui pourrait indiquer une surestimation des usages. Les usages identifiés incluent la recherche d'informations et la rédaction de textes, bien que ces réponses ne puissent pas être cumulées dans les choix proposés.
Analyse Critique
Une analyse plus approfondie révèle que les enseignants peinent à percevoir les bénéfices de l'IA pour l'apprentissage, contrairement aux étudiants. La question de savoir si l'IA améliore les notes sans développer les compétences reste débattue. Est-ce un dopage académique ou une opportunité pour un apprentissage plus efficace ?
Acceptabilité et Éthique
L'enquête révèle que beaucoup d'étudiants jugent acceptable d'utiliser l'IA pour rédiger leurs devoirs, et même un quart des enseignants partagent cet avis. Cela pose des questions éthiques cruciales : copier-coller est-il tricher ? Utiliser l'IA sous supervision ou pour des traductions est-il acceptable ? La réponse n'est pas simple et nécessite un débat ouvert.
Propositions et Solutions
Pour encadrer ces usages, plusieurs solutions sont proposées. Plutôt que d'interdire l'IA, il est suggéré de fixer des règles pour une utilisation responsable. Des innovations pédagogiques peuvent également être explorées, comme la création de situations de concurrence professionnelle ou l'utilisation de détecteurs d'IA.
Conclusion
En conclusion, bien que l'étude présente des limites, elle souligne un besoin urgent de régulation. Une charte institutionnelle pourrait fournir un cadre pour une utilisation éthique.
Le Comptoir OCTO - Équipes infra et prod, ne ratez pas l'embarquement pour l'...OCTO Technology
par Claude Camus (Coach agile d'organisation @OCTO Technology) et Gilles Masy (Organizational Coach @OCTO Technology)
Les équipes infrastructure, sécurité, production, ou cloud, doivent consacrer du temps à la modernisation de leurs outils (automatisation, cloud, etc) et de leurs pratiques (DevOps, SRE, etc). Dans le même temps, elles doivent répondre à une avalanche croissante de demandes, tout en maintenant un niveau de qualité de service optimal.
Habitué des environnements développeurs, les transformations agiles négligent les particularités des équipes OPS. Lors de ce comptoir, nous vous partagerons notre proposition de valeur de l'agilité@OPS, qui embarquera vos équipes OPS en Classe Business (Agility), et leur fera dire : "nous ne reviendrons pas en arrière".
MongoDB in a scale-up: how to get away from a monolithic hell — MongoDB Paris...Horgix
This is the slide deck of a talk by Alexis "Horgix" Chotard and Laurentiu Capatina presented at the MongoDB Paris User Group in June 2024 about the feedback on how PayFit move away from a monolithic hell of a self-hosted MongoDB cluster to managed alternatives. Pitch below.
March 15, 2023, 6:59 AM: a MongoDB cluster collapses. Tough luck, this cluster contains 95% of user data and is absolutely vital for even minimal operation of our application. To worsen matters, this cluster is 7 years behind on versions, is not scalable, and barely observable. Furthermore, even the data model would quickly raise eyebrows: applications communicating with each other by reading/writing in the same MongoDB documents, documents reaching the maximum limit of 16MiB with hundreds of levels of nesting, and so forth. The incident will last several days and result in the loss of many users. We've seen better scenarios.
Let's explore how PayFit found itself in this hellish situation and, more importantly, how we managed to overcome it!
On the agenda: technical stabilization, untangling data models, breaking apart a Single Point of Failure (SPOF) into several elements with a more restricted blast radius, transitioning to managed services, improving internal accesses, regaining control over risky operations, and ultimately, approaching a technical migration when it impacts all development teams.
Ouvrez la porte ou prenez un mur (Agile Tour Genève 2024)Laurent Speyser
(Conférence dessinée)
Vous êtes certainement à l’origine, ou impliqué, dans un changement au sein de votre organisation. Et peut être que cela ne se passe pas aussi bien qu’attendu…
Depuis plusieurs années, je fais régulièrement le constat de l’échec de l’adoption de l’Agilité, et plus globalement de grands changements, dans les organisations. Je vais tenter de vous expliquer pourquoi ils suscitent peu d'adhésion, peu d’engagement, et ils ne tiennent pas dans le temps.
Heureusement, il existe un autre chemin. Pour l'emprunter il s'agira de cultiver l'invitation, l'intelligence collective , la mécanique des jeux, les rites de passages, .... afin que l'agilité prenne racine.
Vous repartirez de cette conférence en ayant pris du recul sur le changement tel qu‘il est généralement opéré aujourd’hui, et en ayant découvert (ou redécouvert) le seul guide valable à suivre, à mon sens, pour un changement authentique, durable, et respectueux des individus! Et en bonus, 2 ou 3 trucs pratiques!
Le Comptoir OCTO - Qu’apporte l’analyse de cycle de vie lors d’un audit d’éco...OCTO Technology
Par Nicolas Bordier (Consultant numérique responsable @OCTO Technology) et Alaric Rougnon-Glasson (Sustainable Tech Consultant @OCTO Technology)
Sur un exemple très concret d’audit d’éco-conception de l’outil de bilan carbone C’Bilan développé par ICDC (Caisse des dépôts et consignations) nous allons expliquer en quoi l’ACV (analyse de cycle de vie) a été déterminante pour identifier les pistes d’actions pour réduire jusqu'à 82% de l’empreinte environnementale du service.
Vidéo Youtube : https://www.youtube.com/watch?v=7R8oL2P_DkU
Compte-rendu :
Crossover probability describes how often crossover would be performed.If no crossover the new off springswould be exact copies of parents
Example of one point crossover ..Crossover from the 9th bit
10000 shows impossible paths/ non pathsOther values are costs associated with a path
Crossover probability is the measure of how often crossover would be performed.More than 0.5 is optimum
Mutation probability (or ratio) is basically a measure of the likeness that random elements of your chromosome will be flipped into something else
There may be change in topology of network as some nodes may join the network or some nodes may leave the network or some nodes may fail. Under these circumstances the optimal path may no more be the shortest.Hence the network has to be refreshed at every t secondsand new routes may be generated