A Comparison of Three Methods for Selecting Values of Input Variables in the Analysis of Output from a Computer Code

McKay, Michael D.; Beckman, R. J.; Conover, W. J.

doi:10.2307/1268522

Cited by 2,828 publications

(640 citation statements)

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“…Therefore, to obtain maximum-likelihood estimates (MLEs) is an optimization problem. We used simulated annealing [29], an optimization procedure that is less prone to become trapped in suboptimal values, and the Latin hypercube, a sampling technique that allows to explore large parameter space [30]. We repeated the procedure 30 times for each combination of networks and models, starting from different points in parameter space to improve the reliability of the estimates.…”

Section: Food Web Models and Assembly Rules Of Antagonistic Networkmentioning

confidence: 99%

Interaction intimacy organizes networks of antagonistic interactions in different ways

Pires

Guimarães

2013

J. R. Soc. Interface.

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Interaction intimacy, the degree of biological integration between interacting individuals, shapes the ecology and evolution of species interactions. A major question in ecology is whether interaction intimacy also shapes the way interactions are organized within communities. We combined analyses of network structure and food web models to test the role of interaction intimacy in determining patterns of antagonistic interactions, such as hostparasite, predator -prey and plant -herbivore interactions. Networks describing interactions with low intimacy were more connected, more nested and less modular than high-intimacy networks. Moreover, the performance of the models differed across networks with different levels of intimacy. All models reproduced well low-intimacy networks, whereas the more elaborate models were also capable of reproducing networks depicting interactions with higher levels of intimacy. Our results indicate the key role of interaction intimacy in organizing antagonisms, suggesting that greater interaction intimacy might be associated with greater complexity in the assembly rules shaping ecological networks.

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Section: Food Web Models and Assembly Rules Of Antagonistic Networkmentioning

confidence: 99%

Interaction intimacy organizes networks of antagonistic interactions in different ways

Pires

Guimarães

2013

J. R. Soc. Interface.

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“…It is important that the parameter sample be sufficiently dense in the peak region to ensure that many sets have non-negligible weights. We use Latin Hypercube sampling (LHS) [38,39], which samples a function of K variables with the range of each variable divided into M equally-spaced intervals. Each combination of M and K is sampled at most once, with a maximum number of combinations being (M !)…”

Section: A Computational Approachmentioning

confidence: 99%

Event-by-event evaluation of the prompt fission neutron spectrum from239Pu(n,f)

et al. 2012

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“…Realizations of input variables from Table 1 were computed applying the Latin Hypercube Sampling (LHS) method, which is a method of type Monte Carlo (McKey et al 1979). LHS method is used to simulate a real experiment.…”

Section: Discussionmentioning

confidence: 99%

Geometrically Non-Linear Finite Element Reliability Analysis of Steel Plane Frames With Initial Imperfections / Plieninių Rėmų Su Defektais Geometriškai Netiesinė Baigtinių Elementų Patikimumo Analizė

Kala

2012

Journal of Civil Engineering and Management

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Abstract. The random load carrying capacity of steel plane frames with bracing stiffness is studied. The load carrying capacity is evaluated using the geometrically non-linear FEM analysis. The incremental stiffness matrix of a slightly curved element utilized in the non-linear incremental analysis is listed. Initial imperfections are considered as random variables. Statistical analysis and Sobol sensitivity analysis are performed using the Latin Hypercube Sampling method. The effect of initial random imperfections on the load carrying capacity is studied, whilst assuming constant slenderness of the columns. The evaluation parameters are the pair of non-random values of elastic bracing stiffness, and system length of the columns. The paper illustrates that the load carrying capacity is very sensitive to initial crookedness of the columns in the event that the non-sway (symmetric) and sway (anti-symmetric) buckling modes coincide. In this case, the design load carrying capacity obtained from statistical analysis according to the EN 1990the EN (2002 standard is relatively very small (of low safety). Results show that the reliability of design of a steel frame according to EUROCODE 3 (1993) is significantly misaligned. The significance of the first and the second buckling forces as indicators of sensitivity of the load carrying capacity to the imperfections is discussed.

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A Comparison of Three Methods for Selecting Values of Input Variables in the Analysis of Output from a Computer Code

Cited by 2,828 publications

References 0 publications

Interaction intimacy organizes networks of antagonistic interactions in different ways

Interaction intimacy organizes networks of antagonistic interactions in different ways

Event-by-event evaluation of the prompt fission neutron spectrum from239Pu(n,f)

Geometrically Non-Linear Finite Element Reliability Analysis of Steel Plane Frames With Initial Imperfections / Plieninių Rėmų Su Defektais Geometriškai Netiesinė Baigtinių Elementų Patikimumo Analizė

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