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Archive for January, 2011

EARTH SOUNDINGS ANALYSIS: Processing versus Inversion

by admin @ Monday, January 31st, 2011. Tags: adjoint operators, ANALYSIS, discrete fourier, Fast Fourier Transform, interpolation error, iterative methods, matrices and vectors, noisy signals, PARALLEL, phase filters, Seismology, spectral factorization, z plane
Filed under Control and instrumentation, geology, physics

EARTH SOUNDINGS ANALYSIS :  Processing versus Inversion TOC 1 Convolution and Spectra 1.1 SAMPLED DATA AND Z-TRANSFORMS 1.2 FOURIER SUMS 1.3 FOURIER AND Z-TRANSFORM 1.4 CORRELATION AND SPECTRA 2 Discrete Fourier transform 2.1 FT AS AN INVERTIBLE MATRIX 2.2 INVERTIBLE SLOW FT PROGRAM 2.3 SYMMETRIES 2.4 SETTING UP THE FAST FOURIER TRANSFORM 2.5 TWO-DIMENSIONAL FT [...]

Getting Started With Adobe Flex

by admin @ Sunday, January 30th, 2011. Tags: adobe, adobe flex, flex components, html javascript, xml tag
Filed under Computer/IT

Getting Started With Adobe Flex TOC 1 – Introduction to Adobe Flex 1.1 A brief history of Adobe Flex 1.2 Pros and cons of Flex applications 1.3 Versions and editions of Adobe Flex 1.3.1 Adobe Flex 3 SDK 1.3.2 Adobe Flex Builder 3 1.3.3 Adobe Data Services 1.4 The Flex Community 1.4.1 Developer Resources 1.4.2 [...]

Vector Models for Data-Parallel Computing

by admin @ Saturday, January 29th, 2011. Tags: computational geometry, Computing, dtree, geometry algorithms, graph algorithms, Graph theory, matrix multiplication, network models, Parallel computing, scalar instructions, vector models, vector multiplication
Filed under Computer/IT

Vector Models for Data-Parallel Computing by Guy E. Blelloch 1 Introduction 1.1 Parallel Vector Models 1.2 Vector Instructions 1.3 Implementation 1.4 Summary and Roadmap I Models 2 Parallel Vector Models 2.1 The Vector Random Access Machine 2.2 Comparison to P-RAM Models 2.3 Comparison to Circuit and Network Models 2.4 ComparisontoBit-VectorModels 2.5 Selecting Primitives 2.6 Other [...]

Beej’s Guide to Network Programming – Using Internet Socket

by admin @ Friday, January 28th, 2011. Tags: Data Encapsulation, datagram sockets, Handling Partial, internet sockets, stream server
Filed under Computer/IT

Beej’s Guide to Network Programming – using internet socket Contents : 1. Intro 2. What is a socket? 2.1. Two Types of Internet Sockets 2.2. Low level Nonsense and Network Theory 3. IP Addresses, structs, and Data Munging 3.1. IP Addresses, versions 4 and 6 3.2. Byte Order 3.3. structs 3.4. IP Addresses, Part Deux [...]

COMPUTATIONAL ELECTROMAGNETISM

by admin @ Thursday, January 27th, 2011. Tags: approximation, approximation error, computational electromagnetism, ELECTROMAGNETISM, field equations, finite element modeling, finite elements, interpolation error, linear systems, magnetostatics, maxwell, maxwell equations, Model Problem, Variational Formulation
Filed under Computer/IT, Electrical engineering

COMPUTATIONAL ELECTROMAGNETISM 1 Introduction:  Maxwell Equations 1.1 Field Equations 1.2 Constitutive Laws 1.2.1 Dynamics of free charges:  the Vlasov–Maxwell model 1.2.2 Dynamics of conduction charges:  Ohm’s law 1.2.3 Dynamics of bound charges:  dielectric polarization 1.2.4 Magnetization 1.2.5 Summing up:  linear materials 1.3 Macroscopic Interactions 1.3.1 Energy balance 1.3.2 Momentum balance 1.4 Derived Models 2 Magnetostatics:  [...]

Database Fundamentals

by admin @ Wednesday, January 26th, 2011. Tags: data architect, Data Studio, database architect, Database Fundamentals, Database management systems, database objects, database security, functional dependencies, IBM, integrity constraint, object relational model, relational data model, Relational Database, SQL, XML
Filed under Computer/IT

Database Fundamentals 1 – Databases and information models 1.1 What is a database? 1.2 What is a database management system? 1.2.1 The evolution of database management systems 1.3 Introduction to information models and data models 1.4 Types of information models 1.4.1 Network model 1.4.2 Hierarchical model 1.4.3 Relational model 1.4.4 Entity-Relationship model 1.4.5 Object-relational model [...]

Clever Algorithms : Nature-Inspired Programming Recipes

by admin @ Wednesday, January 26th, 2011. Tags: Algorithm, differential, genetic algorithm, grammatical evolution, marginal distribution, neural algorithms, optimization algorithm, programming paradigms, selection algorithm, Simulated Annealing, stochastic algorithms, vector quantization
Filed under Computer/IT

Clever Algorithms Nature-Inspired Programming Recipes TOC I Background 1 Introduction 2 Stochastic Algorithms 2.1 Overview 2.2 Random Search 2.3 Adaptive Random Search 2.4 Stochastic Hill Climbing 2.5 Iterated Local Search 2.6 Guided Local Search 2.7 Variable Neighborhood Search 2.8 Greedy Randomized Adaptive Search 2.9 Scatter Search 2.10 Tabu Search 2.11 Reactive Tabu Search 3 Evolutionary [...]

Guide to Supervisory Control and Data Acquisition (SCADA) and Industrial Control Systems Security

by admin @ Tuesday, January 25th, 2011. Tags: comprehensive security, data acquisition, logic controller, network vulnerabilities, PLC, programmable logic controllers, protocol, risk and vulnerability assessment, SCADA, scada systems, vulnerability
Filed under Computer/IT, Control and instrumentation, Electrical engineering

Guide to Supervisory Control and Data Acquisition (SCADA) and Industrial Control Systems Security TOC 1. Introduction 1.1 Authority 1.2 Purpose and Scope1.3 Audience 1.4 Document Structure 2. Overview of Industrial Control Systems 2.1 Overview of SCADA, DCS, and PLCs 2.2 ICS Operation 2.3 Key ICS Components 2.3.1 Control Components 2.3.2 Network Components 2.4 SCADA Systems [...]

Commissioning Numerical Relays

by admin @ Monday, January 24th, 2011. Tags: electrical system, ELEMENTS, LOGIC, Numerical Relay, polarity, programmable logic, Relay, relays
Filed under Electrical engineering

COMMISSIONING NUMERICAL RELAYS Contents INTRODUCTION COMMISSIONING TRADITIONAL RELAYS COMMISSIONING NUMERICAL RELAYS RELAY CALIBRATION DYNAMIC TESTING DISABLING ELEMENTS FOR TESTING TESTING SETTING GROUP CHANGE DYNAMIC OR ADAPTIVE CHARACTERISTICS TESTING PROGRAMMABLE LOGIC TESTING EXTERNAL INPUTS TESTING TARGETS AND OUTPUT CONTACTS MAKING CHANGES TO EXISTING SETTINGS IN-SERVICE READINGS FOR NUMERICAL RELAYS CT POLARITY USING THE NUMERICAL RELAY AS [...]

State-of-the-Art Weld Repair Technology for Rotating Components

by admin @ Sunday, January 23rd, 2011. Tags: damage mechanisms, disc material, manufacturing, mechanical properties, repair technology, rotor dynamics, rotors, temperature measurement, turbine, turbine disc, turbine repair, turbine rotor, weld metal, Welding
Filed under Mechanical engineering

State-of-the-Art Weld Repair Technology for Rotating Components Volume 1: Weld Repair of Steam Turbine Discs andRotors 1 Description of the Project 1.1 Introduction 1.2 Background 1.3 Guideline Structure 1.4 Survey Information and EPRI Studies 1.5 EPRI Rotor Weld Repair Database 1.6 Project Advisory Structure 2 Turbine Rotor and Disc Material and Weld Filler Metal Specifications [...]

Noble Gas Geochemistry and Cosmochemistry

by admin @ Saturday, January 22nd, 2011. Tags: cosmochemistry, gas components, geothermal area, isotopic composition, isotopic compositions, isotopic variations, mass spectrometer, metamorphic rocks, noble gas atoms, noble gas geochemistry, noble gases, xenoliths
Filed under Chemistry, physics

Noble Gas Geochemistry and Cosmochemistry Contents 1. Planets, Meteorites and Cosmic Dusts * Primordial Xe Isotopic Abundances and 244Pu-136Xe Ages of Primitive Xe Differentiated Achondrites * The RELAX Mass Spectrometer and Its Application to Iodine-Xenon Dating * Enrichment and Fractionation of Noble Gases in Bubbles * “Q-Gases” as “Local” Primordial Noble Gas Component in Primitive [...]

Magnetism, Structure and Their Interactions

by admin @ Friday, January 21st, 2011. Tags: crystal structures, electron gas, Electronic Hamiltonian, Insulators, lattice model, MAGNETIC, magnetic moment, magnetic transitions, square lattice
Filed under physics

Magnetism, Structure and Their Interactions PhD Thesis by Wenxu Zhang T OC 1 Introduction 2 Theoretical Background 2.1 Electronic Hamiltonian in a solid 2.2 Density functional theory and the Kohn-Sham scheme 2.3 The Kohn-Sham equations 2.4 Basics of FPLO code 2.5 Model considerations 2.5.1 Free electron gas in Hartree Fock approximation 2.5.2 The Stoner model [...]

Motor Protection Application Guide

by admin @ Thursday, January 20th, 2011. Tags: generator, ground fault, motor bus, motor protection, PROTECTION, residual voltage, stator, thermal damage
Filed under Electrical engineering

Motor Protection Application Guide TOC 1. INTRODUCTION 2. OVERVIEW OF MOTOR HAZARDS 3. PROTECTION 3.1 Stator Faults SELF-BALANCING DIFFERENTIAL PERCENTAGE-RESTRAINT DIFFERENTIAL GROUND SENSOR 50G RESIDUAL GROUND CONNECTION 51N GROUND FAULT 50N 3.2 Thermal Damage RTD Temperature Sensing and Voting TRADITIONAL 51-ELEMENT IMPLENTATION CAUSE AND EFFECTS DETECTION Motor Bus Application 3.3 Abnormal Supply 3.4 Mechanical or [...]

Electronic Structure and Exchange Integrals of Low-Dimensional Cuprates – Dissertation / PhD Thesis

by admin @ Tuesday, January 18th, 2011. Tags: absorption spectroscopy, band structure calculations, electronic structure, excitations, MAGNETIC, magnetic properties, model calculations, symmetry analysis
Filed under Chemistry

Electronic Structure and Exchange Integrals of Low-Dimensional Cuprates 1 Introduction 2 Electronic structure of solids 2.1 Density functional theory 2.1.1 Kohn-Sham-Equations 2.1.2 The local spin density approximation 2.1.3 Quasiparticle excitations and L(S)DA+U 2.2 The optimized LCAO method 2.2.1 The local basis set 2.2.2 The calculation of the potential 2.2.3 Advantages and disadvantages of the method [...]

Electrons and Chemical Bonding

by admin @ Monday, January 17th, 2011. Tags: alkali halides, bond properties, chemical bonds, electron atoms, electron waves, Energy, Hydrogen, hydrogen atom, hydrogen molecule, ionic model, ionization potentials, molecular orbital theory, orbital energy, schrodinger wave equation, valence bonds
Filed under Chemistry

Electron Chemical Bonds TOC I Elcetrons in Atoms 1-1 Introductory Remarks 1-2 Kohr Theory of the Hydrogen Atom (1913) 1-3 The Spectrum of the Hydrogin Atom 1-4 The Need to modify the Bohr Theory 1-5 Electron Waves 1-6 The Uncertainty Principle 1-7 The Wave Function 1-8 The Schrodinger Wave Equation 1-9 The Normalization Constant 1-10 [...]

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