Search Constraints
Number of results to display per page
Results for:
Search Results
-
Presentation
This video was recorded at European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD), Athens 2011. Comparing frequency counts over texts or corpora is an important task in many applications and scientific disciplines. Given a text corpus, we want to test a hypothesis, such as "word X is frequent", "word X has become more frequent over time", or "word X is more frequent in male than in female speech". For this purpose we need a null model of word frequencies. The commonly used bag-of-words model, which corresponds to a Bernoulli process with fixed parameter, does not account for any structure present in natural languages. Using this model for word frequencies results in large numbers of words being reported as unexpectedly frequent. We address how to take into account the inherent occurrence patterns of words in significance testing of word frequencies. Based on studies of words in two large corpora, we propose two methods for modeling word frequencies that both take into account the occurrence patterns of words and go beyond the bag-of-words assumption. The first method models word frequencies based on the spatial distribution of individual words in the language. The second method is based on bootstrapping and takes into account only word frequency at the text level. The proposed methods are compared to the current gold standard in a series of experiments on both corpora. We find that words obey different spatial patterns in the language, ranging from bursty to non-bursty/uniform, independent of their frequency, showing that the traditional approach leads to many false positives.
- Subjects:
- Management and Computing
- Keywords:
- Computational linguistics Text processing (Computer science) Discourse analysis -- Data processing
- Resource Type:
- Presentation
-
Courseware
An introductory course in analog circuit synthesis for microelectronic designers. Topics include: Review of analog design basics; linear and non-linear analog building blocks: harmonic oscillators, (static and dynamic) translinear circuits, wideband amplifiers, filters; physical layout for robust analog circuits; design of voltage sources ranging from simple voltage dividers to high-performance bandgaps, and current source implementations from a single resistor to high-quality references based on negative-feedback structures.
- Subjects:
- Electrical Engineering
- Keywords:
- Analog integrated circuits
- Resource Type:
- Courseware
-
e-book
This first general textbook An introduction to ontology engineering has as main aim to provide the reader with a comprehensive introductory overview of ontology engineering. A secondary aim is to provide hands-on experience in ontology development that illustrate the theory. The book is divided into three blocks: Block I: logic foundations for ontologies both regarding the languages (mainly First Order predicate Logic, Description Logics, and OWL) and automated reasoning. Block II: developing good ontologies with methods and methodologies, the top-down approach with foundational ontologies, and the bottom-up approach to extract as much useful content as possible from legacy material. Block III: advanced topics with a selection of areas of specialisation, including Ontology-Based Data Access, the interaction between ontologies and natural languages (multilingual ontologies, controlled natural language), and advanced modelling with additional language features (fuzzy and temporal ontologies).
- Subjects:
- Computing
- Keywords:
- Ontologies (Information retrieval) Computer software -- Development Textbooks
- Resource Type:
- e-book
-
e-book
This textbook, or really a “coursebook” for a college freshman-level class, has been updated for Spring 2014 and provides an introduction to programming and problem solving using both Matlab and Mathcad. We provide a balanced selection of introductory exercises and real-world problems (i.e. no “contrived” problems). We include many examples and screenshots to guide the reader. We assume no prior knowledge of Matlab or Mathcad.
-
e-book
An Introduction to Computer Networksis a free and open general-purpose computer-networking textbook, complete with diagrams and exercises.It covers the LAN, internetworking and transport layers, focusing primarily on TCP/IP. Particular attention is paid to congestion; other special topics include queuing, real-time traffic, network management, security and the ns simulator. The book is suitable as the primary text for an undergraduate or introductory graduate course in computer networking, as a supplemental text for a wide variety of network-related courses, and as a reference work.
- Subjects:
- Computing
- Keywords:
- Computer networks Computer network protocols Textbooks
- Resource Type:
- e-book
-
Others
All About Circuits is one of the world’s largest and most active independent online communities for electrical engineers. Founded in 2004 with only a forum and open-source textbook, AAC has grown over the years into a thriving community of engineers collaborating and sharing expertise. AAC provides resources and facilitates discussion amongst EEs to provide real-world solutions to the challenges they face today. Whether you’re learning RF design, honing your PCB layout skills, figuring out Verilog, or looking for inspiration for your next design, AAC is your home for technical information, news, and tools. AAC provides free access to technical resources for engineers around the globe, including tools, guides, textbooks, and technical articles. These resources are built from the ground-up to educate both engineers who are new to the industry and those who are looking to continue their professional development. The featured resources cover the topic of analog, auto, connectors, digital ICS, electronmechanical, embedded, IoT, and Passives.
- Course related:
- EIE2100 Circuit Analysis
- Subjects:
- Electrical Engineering
- Keywords:
- Electric circuits Electric lines Electrical engineering
- Resource Type:
- Others
-
Courseware
This course treats various methods to design and analyze datastructures and algorithms for a wide range of problems. The most important new datastructure treated is the graph, and the general methods introduced are: greedy algorithms, divide and conquer, dynamic programming and network flow algorithms. These general methods are explained by a number of concrete examples, such as simple scheduling algorithms, Dijkstra, Ford-Fulkerson, minimum spanning tree, closest-pair-of-points, knapsack, and Bellman-Ford. Throughout this course there is significant attention to proving the correctness of the discussed algorithms. All material for this course is in English. The recorded lectures, however, are in Dutch.
- Subjects:
- Computing
- Keywords:
- Algorithms Data structures (Computer science)
- Resource Type:
- Courseware
-
e-book
An introductory coverage of algorithms and data structures with application to graphics and geometry.
- Subjects:
- Computing
- Keywords:
- Algorithms Data structures (Computer science) Textbooks
- Resource Type:
- e-book
-
Others
Algorithm Visualizer is an interactive online platform that visualizes algorithms from code. Learning an algorithm gets much easier with visualizing it.
- Subjects:
- Computing
- Keywords:
- Algorithms Information visualization
- Resource Type:
- Others
-
Courseware
This course provides an overview of airline management decision processes with a focus on economic issues and their relationship to operations planning models and decision support tools. It emphasizes the application of economic models of demand, pricing, costs, and supply to airline markets and networks, and it examines industry practice and emerging methods for fleet planning, route network design, scheduling, pricing and revenue management.
- Subjects:
- Aeronautical and Aviation Engineering and Hotel, Travel and Tourism
- Keywords:
- Airlines -- Management
- Resource Type:
- Courseware
-
Courseware
This course adopts a holistic view of the aircraft as a system, covering: basic systems engineering; cost and weight estimation; basic aircraft performance; safety and reliability; lifecycle topics; aircraft subsystems; risk analysis and management; and system realization.
- Subjects:
- Aeronautical and Aviation Engineering
- Keywords:
- Airplanes -- Design construction
- Resource Type:
- Courseware
-
Courseware
This class includes a brief review of applied aerodynamics and modern approaches in aircraft stability and control. Topics covered include static stability and trim; stability derivatives and characteristic longitudinal and lateral-directional motions; and physical effects of the wing, fuselage, and tail on aircraft motion. Control methods and systems are discussed, with emphasis on flight vehicle stabilization by classical and modern control techniques; time and frequency domain analysis of control system performance; and human-pilot models and pilot-in-the-loop controls with applications. Other topics covered include V/STOL stability, dynamics, and control during transition from hover to forward flight; parameter sensitivity; and handling quality analysis of aircraft through variable flight conditions. There will be a brief discussion of motion at high angles-of-attack, roll coupling, and other nonlinear flight regimes.
- Subjects:
- Aeronautical and Aviation Engineering
- Keywords:
- Stability of airplanes Flight control
- Resource Type:
- Courseware
-
e-book
This book includes nine chapters that demonstrate the multi-disciplinary character of the air traffic control domain.
- Subjects:
- Aeronautical and Aviation Engineering
- Keywords:
- Air traffic control
- Resource Type:
- e-book
-
Others
Software developments is advancing the technological world today. This changes have far more reaching implications in I.T industries such as Big data, Artificial intelligence and Agile Software development methodologies. Competition in the software development ecosystem has made developers to build software that are quick and reliable and often referred to as Agile development. Agile transformation is real and requires rethinking the business management, recruitment process and data strategy in a bid to stimulate disruptive solutions from within in-house development and deployment. AI product development would require rapid transformational changes within any organization. This can be accomplished by establishing specific operating models that permit development teams with the freedom of technology choice. This publication highlights some operating models that can be adopted to improve the success of AI products using Agile software development methodologies.
- Subjects:
- Computing
- Keywords:
- Agile software development
- Resource Type:
- Others
-
e-book
This book is a guide to implement simple agent-based evolutionary models using NetLogo. All the models we implement are agent-based, i.e. individual agents and their interactions are explicitly represented in the models. To formalise agents’ interactions we use the basic framework of Evolutionary Game Theory. NetLogo is a multi-agent programmable modeling environment used by hundreds of thousands of students, teachers and researchers all around the globe. No coding experience is necessary to fully understand the contents of this book.
- Subjects:
- Computing
- Keywords:
- Game theory Computer simulation Textbooks
- Resource Type:
- e-book
-
Others
Agent based modeling focuses on the individual active components of a system. This is in contrast to both the more abstract system dynamics approach, and the process-focused discrete event method. With agent based modeling, active entities, known as agents, must be identified and their behavior defined. They may be people, households, vehicles, equipment, products, or companies, whatever is relevant to the system. Connections between them are established, environmental variables set, and simulations run. The global dynamics of the system then emerge from the interactions of the many individual behaviors. AnyLogic combines professional discrete event, system dynamics, and agent based modeling in one platform for efficient, no compromise results. In our white paper, Multimethod Simulation Modeling for Business Applications, we investigate these three main simulation modeling approaches and construct a multimethod model example to illustrate the advantages of multimethod simulation modeling. Read the white paper and see why hybrid models are always a better choice!
- Course related:
- CE631 Simulation and IT Applications in Construction
- Subjects:
- Business Information Technology and Computing
- Keywords:
- Computer simulation Multiagent systems System analysis -- Data processing
- Resource Type:
- Others
-
Video
An online lecture on the topic of "Aerothermodynamics in the Entry, Deceleration, and Landing Phase (EDL) of the Mars Mission".This lecture of “Science World: Exploring Space to Benefit Mankind” Education Programme in the 2021/22 school year for secondary students, which aims to cultivate the interest of local youth in space science and elevate their enthusiasm for participating in the development of space technology.
- Subjects:
- Industrial and Systems Engineering and Aeronautical and Aviation Engineering
- Keywords:
- Aerothermodynamics Space flight to Mars
- Resource Type:
- Video
-
Courseware
Welcome to this course of Aerospace Mechanics of Materials. We are happy that you chose to join us on this exciting journey. This course deals with basic material and geometry dependent analysis of structures. In this course, you will investigate how these material properties, in combination with structural geometries, affect the design and performance of basic structural elements under axial, torsion, bending and shear loading. We have divided this course into eight different subjects and a review chapter. In those subject, you will find video lectures and readings, where the concepts and theory will be explained; examples, where we will solve a problem for you, so you can reinforce the concepts you have learned; and exercises, that will allow you to test your knowledge.
- Subjects:
- Aeronautical and Aviation Engineering
- Keywords:
- Mechanics Applied Aerospace engineering Mechanical engineering Strength of materials Materials
- Resource Type:
- Courseware
-
e-journal
Aerospace is an international, peer-reviewed, open access journal (free for readers) devoted to the publication of original papers, review articles, short notes and communications related to all fields of aerospace science, engineering and technology, disclosing theoretical, fundamental and applied results linked to potential applications that are related to research, design, manufacture, operations, control and maintenance of aircraft and spacecraft.
- Subjects:
- Aeronautical and Aviation Engineering
- Keywords:
- Aeronautics Astronautics
- Resource Type:
- e-journal
-
e-book
This web textbook contains information, data tables and computer programs for the study of aerodynamics, gas dynamics, propulsion, aircraft performance and flight mechanics. Topics relevant to the undergraduate engineering degree at a university level are covered.
- Subjects:
- Aeronautical and Aviation Engineering
- Keywords:
- Aerodynamics
- Resource Type:
- e-book