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  • 1
    Monograph available for loan
    Monograph available for loan
    Chichester : Wiley
    Call number: 11/M 15.0105
    Description / Table of Contents: Preface. Acknowledgments. 1. Preliminaries 1. 1.1 Random Experiments. 1.2 Conditional Probability and Independence. 1.3 Random Variables and Probability Distributions. 1.4 Some Important Distributions. 1.5 Expectation. 1.6 Joint Distributions. 1.7 Functions of Random Variables. 1.8 Transforms. 1.9 Jointly Normal Random Variables. 1.10 Limit Theorems. 1.11 Poisson Processes. 1.12 Markov Processes. 1.12.1 Markov Chains. 1.12.2 Markov Jump Processes. 1.13 Efficiency of Estimators. 1.14 Information. 1.15 Convex Optimization and Duality. 1.15.1 Lagrangian Method. 1.15.2 Duality. Problems. References. 2. Random Number, Random Variable and Stochastic Process Generation. 2.1 Introduction. 2.2 Random Number Generation. 2.3 Random Variable Generation. 2.3.1 Inverse-Transform Method. 2.3.2 Alias Method. 2.3.3 Composition Method. 2.3.4 Acceptance-Rejection Method. 2.4 Generating From Commonly Used Distributions. 2.4.1 Generating Continuous Random Variables. 2.4.2 Generating Discrete Random Variables. 2.5 Random Vector Generation. 2.5.1 Vector Acceptance-Rejection Method. 2.5.2 Generating Variables From a Multinormal Distribution. 2.5.3 Generating Uniform Random Vectors Over a Simplex. 2.5.4 Generating Random Vectors, Uniformly Distributed Over a Unit Hyper-Ball and Hyper-Sphere. 2.5.5 Generating Random Vectors, Uniformly Distributed Over a Hyper-Ellipsoid. 2.6 Generating Poisson Processes. 2.7 Generating Markov Chains and Markov Jump Processes. 2.8 Generating Random Permutations. Problems. References. 3. Simulation of Discrete Event Systems. 3.1 Simulation Models. 3.2 Simulation Clock and Event List for DEDS. 3.3 Discrete Event Simulation. 3.3.1 Tandem Queue. 3.3.2 Repairman Problem. Problems. References. 4. Statistical Analysis of Discrete Event Systems. 4.1 Introduction. 4.2 Static Simulation Models. 4.3 Dynamic Simulation Models. 4.3.1 Finite-Horizon Simulation. 4.3.2 Steady-State Simulation. 4.4 The Bootstrap Method. Problems. References. 5. Controlling the Variance. 5.1 Introduction. 5.2 Common and Antithetic Random Variables. 5.3 Control Variables. 5.4 Conditional Monte Carlo. 5.4.1 Variance Reduction for Reliability Models. 5.5 Stratified Sampling. 5.6 Importance Sampling. 5.6.1 The Variance Minimization Method. 5.6.2 The Cross-Entropy Method. 5.7 Sequential Importance Sampling. 5.7.1 Non-linear Filtering for Hidden Markov Models. 5.8 The Transform Likelihood Ratio Method. 5.9 Preventing the Degeneracy of Importance Sampling. 5.9.1 The Two-Stage Screening Algorithm. 5.9.2 Case Study. Problems. References. 6. Markov Chain Monte Carlo. 6.1 Introduction. 6.2 The Metropolis-Hastings Algorithm. 6.3 The Hit-and-Run Sampler. 6.4 The Gibbs Sampler. 6.5 Ising and Potts Models. 6.6 Bayesian Statistics. 6.7 Other Markov Samplers. 6.8 Simulated Annealing. 6.9 Perfect Sampling. Problems. References. 7. Sensitivity Analysis and Monte Carlo Optimization. 7.1 Introduction. 7.2 The Score Function Method for Sensitivity Analysis of DESS. 7.3 Simulation-Based Optimization of DESS. 7.3.1 Stochastic Approximation. 7.3.2 The Stochastic Counterpart Method. 7.4 Sensitivity Analysis of DEDS. Problems. References. 8. The Cross-Entropy Method. 8.1 Introduction. 8.2 Estimation of Rare Event Probabilities. 8.2.1 The Root-Finding Problem. 8.2.2 The Screening Method for Rare Events. 8.3 The CE-Method for Optimization. 8.4 The Max-cut Problem. 8.5 The Partition Problem. 8.6 The Travelling Salesman Problem. 8.6.1 Incomplete Graphs. 8.6.2 Node Placement. 8.6.3 Case Studies. 8.7 Continuous Optimization. 8.8 Noisy Optimization. Problems. References. 9. Counting via Monte Carlo. 9.1 Counting Problems. 9.2 Satisfiability Problem. 9.2.1 Random K-SAT (K-RSAT). 9.3 The Rare-Event Framework for Counting. 9.3.1 Rare-Events for the Satisfiability Problem. 9.4 Other Randomized Algorithms for Counting. 9.4.1 Complexity of Randomized Algorithms: FPRAS and FPAUS. 9.5 MinxEnt and Parametric MinxEnt. 9.5.1 The MinxEnt Method. 9.5.2 Rare-Event Probability Estimation Using PME. 9.6 PME for COPs and Decision Making. 9.7 Numerical Results. Problems. References. Appendix A. A.1 Cholesky Square Root Method. A.2 Exact Sampling from a Conditional Bernoulli Distribution. A.3 Exponential Families. A.4 Sensitivity Analysis. A.4.1 Convexity Results. A.4.2 Monotonicity Results. A.5 A simple implementation of the CE algorithm for optimizing the 'peaks' function. A.6 Discrete-time Kalman Filter. A.7 Bernoulli Disruption Problem. A.8 Complexity of Stochastic Programming Problems. Problems. References. Acronyms. List of Symbols. Index.
    Type of Medium: Monograph available for loan
    Pages: 345 S. : graph. Darst.
    Edition: 2nd ed.
    ISBN: 9780470177945
    Series Statement: Wiley series in probability and statistics
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Annals of operations research 39 (1992), S. 229-250 
    ISSN: 1572-9338
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract Let $$l(v) = E_{v_1 } \{ L(Y,v_2 )\} $$ be the expected performance measure of adiscrete event system (DES), whereL is the sample performance depending on the vector of parametersv 2 and driven by an input vectorY, which has a probability density function (pdf)f(y, v 1),v=(v 1,v 2) is a vector of parameters, and the subscriptv 1 in E $$E_{v_1 } L$$ indicates that the expectation is taken with respect to the pdff(y, v 1). Suppose thatl(v) is not available analytically and we want to evaluate (estimate) it, as well as the associated sensitivities ∇ k l(v),k=1, 2, ...simultaneously for different values ofv=(v 1,v 2) via simulation. In this paper, we show that in some cases interesting for applications, we can estimatel(v) and ∇ k l(v),k=1,2, ... by using the so-called “push out” technique. More precisely, we show that it is possible to replace the original sample performance by an auxiliary one while “pushing out” the parameter vectorv 2 from the original sample performance functionL(Y,v 2) to a pdf $$\tilde f$$ (x,v 1,v 2) associated with the original onef(y,v 1). We also show how both the auxiliary sample performance and the associated pdf can be obtained from their original counterparts and how to combine them together to perform sensitivity analysis for the original DES. Particular emphasis will be placed on the case where the sample performance functionL(y,v 2) isneither analytically available nor everywhere differentiable in v 2. We finally discuss the advantage of the proposed method and present numerical results supporting our theory.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Annals of operations research 39 (1992), S. 97-119 
    ISSN: 1572-9338
    Keywords: Min-max problems ; nondifferentiable optimization ; polynomial approximations ; smoothed functionals ; digital signal processing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract In this paper we present a method for nondifferentiable optimization, based on smoothed functionals which preserve such useful properties of the original function as convexity and continuous differentiability. We show that smoothed functionals are convenient for implementation on computers. We also show how some earlier results in nondifferentiable optimization based on smoothing-out of kink points can be fitted into the framework of smoothed functionals. We obtain polynomial approximations of any order from smoothed functionals with kernels given by Beta distributions. Applications of smoothed functionals to optimization of min-max and other problems are also discussed.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Annals of operations research 39 (1992), S. 195-227 
    ISSN: 1572-9338
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract This paper surveys some recent results and presents some new results on the so-called decomposable and truncated score functions (DSF and TSF) estimators for performance evaluation, sensitivity analysis and optimization of open non-Markovian (non-product) queueing networks. The idea behind the TSF estimators is based on truncation of the score function process, while the idea behind the DSF estimators is to decompose the queueing network into smaller units, calledmodules, such that each module contains several connected queues, and then approximate the unknown quantities by treating these modules as if they were completely independent. In other words, in the DSF estimators we use frequently occurrentlocal regenerative cycles at eachindividual module instead oftrue but seldom occurrentglobal ones of theentire system. Although the local cycles at each module interact with their neighbors, our numerical studies show that typically the contribution from the neighbors is quite small and thus DSF estimators approximate the unknown quantities rather well, in the sense that their bias is reasonably small and the variance is much smaller than that of the standard score function estimators. Both DSF and TSF estimators were implemented in a simulation package, called thequeueing network stabilizer and optimizer (QNSO). This package is suitable for performance evaluation, sensitivity analysis and optimization of general open non-Markovian queueing networks with respect to the parameter vector of an exponential family of distributions.
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  • 5
    ISSN: 1573-7594
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this work, we examine how to combine the score function method with the standard crude Monte Carlo and experimental design approaches, in order to evaluate the expected performance of a discrete event system and its associated gradient simultaneously for different scenarios (combinations of parameter values), as well as to optimize the expected performance with respect to two parameter sets, which represent parameters of the underlying probability law (for the systems evolution) and parameters of the sample performance measure, respectively. We explore how the stochastic approximation and stochastic counterpart methods can be combined to perform optimization with respect to both sets of parameters at the same time. We outline three combined algorithms of that form, one sequential and two parallel, and give a convergence proof for one of them. We discuss a number of issues related to the implementation and convergence of those algorithms, introduce averaging variants, and give numerical illustrations.
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  • 6
    Publication Date: 1992-12-01
    Print ISSN: 0254-5330
    Electronic ISSN: 1572-9338
    Topics: Mathematics , Economics
    Published by Springer
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  • 7
    Publication Date: 1992-12-01
    Print ISSN: 0254-5330
    Electronic ISSN: 1572-9338
    Topics: Mathematics , Economics
    Published by Springer
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  • 8
    Publication Date: 2005-02-01
    Print ISSN: 0254-5330
    Electronic ISSN: 1572-9338
    Topics: Mathematics , Economics
    Published by Springer
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  • 9
    Publication Date: 1992-12-01
    Print ISSN: 0254-5330
    Electronic ISSN: 1572-9338
    Topics: Mathematics , Economics
    Published by Springer
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  • 10
    Publication Date: 2005-02-01
    Print ISSN: 0254-5330
    Electronic ISSN: 1572-9338
    Topics: Mathematics , Economics
    Published by Springer
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