History: Patrick Cousot, Radhia Cousot 1977 I Abstract Interpretation: A Uni ed Lattice Model for Static Analysis of Programs by Construction or Approximation of Fixpoints, 1977 I Methods and Logics for Proving Programs, 1990 I Completeness in Abstract Interpretation, 1995 I Directions for Research in Approximate System Analysis, 1999 I Probabilistic Abstract Interpretation, 2012
Continue Reading...Static analysis by abstract interpretation (Cousot 77) Choose properties of interest (for instance values of variables) Over-approximate them in an abstract lattice (inclusion": partially ordered structure with least upper bounds/greatest lower bounds) Interpret computations in this lattice GT MEA, GdR MACS, 19th of March 2015 Static Analysis by Abstract Interpretation of Numerical Programs ...
Continue Reading...rare-event analysis. In static network reliability estimation, the graph models often deal with failing links. In this paper, we propose an adaptation of an approximate Zero-Variance Importance Sampling method to evaluate the reliability of real transport systems where nodes are the failing components. This is more representative of railway telecommunication system behavior. Robustness ...
Continue Reading...in invariant generation for approximate safety analysis) or dually from be low when considering less behaviors than existing ones (as in approximate liveness analysis). The approximation may be static (e.g. Galois connec tion based approximation) that is made before the analysis is started or preferably dynamic (e.g. widening/narrowing based approximation) when approximations are made ...
Continue Reading...Approximate Analysis of a Continuous Beam for Gravity Loads Continuous beams and girders occur commonly in building floor systems and bridges. In the approximate analysis of con-tinuous beams, points of inflection or inflection point (IP) positions are assumed equal in number to the degree of static indeterminacy.
Continue Reading...generalized dynamic factor model-for the empirical analysis of financial and macro-economic data sets characterized by a large number of observations both cross sec-tion and over time. This model provides a generalization of the static approximate factor model of Chamberlain (1983, Econometrica 51, 1181-1304) and Chamber- lain and Rothschild (1983, Econometrica 51, 1305-1324) by allowing ...
Continue Reading...Abstract: Pushover analysis is a simplified nonlinear analysis technique that can be used to estimate the dynamic demands imposed on a structure under earthquake excitations. One of the first steps taken in this approximate solution is to assess the maximum roof displacement, known as target displacement, using the base shear versus roof displacement diagram. That could be done by the so ...
Continue Reading...FINITE ELEMENT ANALYSIS OF FLEXIBLE, ROTATING BLADES Oliver G. McGee* National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio 44135 _D CY) I i,i SUMMARY This report should be used as a reference guide when using the finite element method to approximate the static and dynamic behavior of flexible, rotating blades. Important parameters such as twist, sweep, camber, co ...
Continue Reading...In the linear static analysis procedure, the peak dynamic demand is estimated by linear static analysis of the bridge due to lateral forces appropriate for bridges crossing fault-rupture zones. The three approximate procedures are shown to provide estimates of seismic demands that are accurate enough to be useful for practical applications. The linear static analysis procedure, which is much ...
Continue Reading...cosas —y la educación en lugar privilegiado— cambian con extrema rapidez, es algo cada vez más evidente. Así pues, a un colectivo como el de los profesio-nales de la Teoría e Historia de la Educación compete analizar una y otra vez la naturaleza de la educación, que constituye una de las dimensiones esenciales del quehacer humano. De ...
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