'Xi yi' diaporamas de présentation

CS 245: Database System Principles

CS 245: Database System Principles. Notes 5: Hashing and More. Hector Garcia-Molina. Hashing. key ? h(key). <key>. Buckets (typically 1 disk block). Two alternatives. records. (1) key ? h(key). Two alternatives. record. (2) key ? h(key). key 1. Index.

703 views • 59 slides

TCOM 501: Networking Theory & Fundamentals

TCOM 501: Networking Theory & Fundamentals Lectures 4 & 5 February 5 and 12, 2003 Prof. Yannis A. Korilis Topics Markov Chains M/M/1 Queue Poisson Arrivals See Time Averages M/M/* Queues Introduction to Sojourn Times 1 0 2 n n +1 The M/M/1 Queue

1.55k views • 41 slides

Lecture 11. Quantum Mechanics. Hartree-Fock Self-Consistent-Field Theory

5.89k views • 40 slides

Local geometry of polypeptide chains Elements of secondary structure ( turns )

Local geometry of polypeptide chains Elements of secondary structure ( turns ). Levels of protein structure organization. Atom symbols and numbering in amino acids. Chirality. Enantiomers.

573 views • 38 slides

GCD

514 views • 34 slides

FUZZY LOGIC AND ITS APPLICATION TO SWITCHING SYSTEMS

461 views • 31 slides

486 views • 27 slides

GG313 Lecture 12

GG313 Lecture 12. Matrix Operations Sept 29, 2005. Matrix Addition. Requirement: same order Characteristic: element-by-element addition Notation: A + B = C. Eqn 3.20. 3 2 C=A+B = 0 4 1 -1. 1 1 A = 1 1

455 views • 26 slides

Hierarchical models for combining multiple data sources measured at individual and small area levels

Hierarchical models for combining multiple data sources measured at individual and small area levels. Chris Jackson With Nicky Best and Sylvia Richardson Department of Epidemiology and Public Health Imperial College, London chris.jackson@imperial.ac.uk. BIAS project

457 views • 26 slides

Processing of VLBI observation in St. Petersburg University

Processing of VLBI observation in St. Petersburg University. Kudryashova Maria Astronomical Institute of Saint Petersburg University. Overvew. Astronomical Institute structure Laboratory of Astrometry Basic principals of VLBI Analysis of VLBI observations in AI SPb.

331 views • 19 slides

Euclidean Algorithm for GCD

Euclidean Algorithm for GCD. CSCI 284/162 Spring 2007 GWU. Euclidean Algorithm considered first non-trivial algorithm. Algorithm_gcd(m, a) /* m > a */ (X, Y) := (m, a) /* Initialize */ while (Y ? 0) (X, Y) := (Y, X rem Y) return(X) Works because: gcd (X, Y) = gcd(Y, X rem Y)

804 views • 9 slides