Global Sensitivity Analysis of Environmental, Water Quality, Photoreactivity, and Engineering Design Parameters in Sunlight Inactivation of Viruses

Abstract. Pesticide transfers in agricultural catchments are responsible for diffuse but major risks to water quality. Spatialized pesticide transfer models are useful tools to assess the impact of the structure of the landscape on water quality. Before considering using these tools in operational contexts, quantifying their uncertainties is a preliminary necessary step. In this study, we explored how global sensitivity analysis can be applied to the recent PESHMELBA pesticide transfer model to quantify uncertainties on transfer simulations. We set up a virtual catchment based on a real one and we compared different approaches for sensitivity analysis that could handle the specificities of the model: high number of input parameters, limited size of sample due to computational cost and spatialized output. We compared Sobol' indices obtained from Polynomial Chaos Expansion, HSIC dependence measures and feature importance measures obtained from Random Forest surrogate model. Results showed the consistency of the different methods and they highlighted the relevance of Sobol' indices to capture interactions between parameters. Sensitivity indices were first computed for each landscape element (site sensitivity indices). Second, we proposed to aggregate them at the hillslope and the catchment scale in order to get a summary of the model sensitivity and a valuable insight into the model hydrodynamical behaviour. The methodology proposed in this paper may be extended to other modular and distributed hydrological models as there has been a growing interest in these methods in recent years.

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Global Sensitivity Analysis of the Vibration Reduction System with Seated Human Body

Shock and Vibration ◽

10.1155/2018/3732746 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Igor Maciejewski ◽

Tomasz Krzyzynski

Keyword(s):

Sensitivity Analysis ◽

Vibration Isolation ◽

Global Sensitivity Analysis ◽

Operating Conditions ◽

Design Parameters ◽

Global Sensitivity ◽

Seat Suspension ◽

Sensitivity Indices ◽

Vibration Transmissibility ◽

Nonlinear Force

The paper deals with the global sensitivity analysis for the purpose of shaping the vibroisolation properties of suspension systems under strictly defined operating conditions. The variance-based method is used to evaluate an influence of nonlinear force characteristics on the system dynamics. The proposed sensitivity indices provide the basis for determining the effect of key design parameters on the vibration isolation performance. The vibration transmissibility behaviour of an exemplary seat suspension system is discussed in order to illustrate the developed methodology.

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Global Sensitivity Analysis of a Water Quality Model in the Three Gorges Reservoir

Water ◽

10.3390/w10020153 ◽

2018 ◽

Vol 10 (2) ◽

pp. 153 ◽

Cited By ~ 2

Author(s):

Yao Cheng ◽

Yajun Li ◽

Fei Ji ◽

Yuchun Wang

Keyword(s):

Water Quality ◽

Sensitivity Analysis ◽

Three Gorges Reservoir ◽

Global Sensitivity Analysis ◽

Water Quality Model ◽

Three Gorges ◽

Quality Model ◽

Global Sensitivity ◽

The Three Gorges Reservoir ◽

The Three Gorges

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Global Sensitivity Analysis of Chosen Harmonic Drive Parameters Affecting Its Lost Motion

Materials ◽

10.3390/ma14175057 ◽

2021 ◽

Vol 14 (17) ◽

pp. 5057

Author(s):

Slavomir Hrcek ◽

Frantisek Brumercik ◽

Lukas Smetanka ◽

Michal Lukac ◽

Branislav Patin ◽

...

Keyword(s):

Sensitivity Analysis ◽

Global Sensitivity Analysis ◽

Important Variable ◽

Design Parameters ◽

Harmonic Drive ◽

Global Sensitivity ◽

Output Torque ◽

Wave Generator ◽

Spline Finite Element ◽

Geometry Parameter

The aim of the presented study was to perform a global sensitivity analysis of various design parameters affecting the lost motion of the harmonic drive. A detailed virtual model of a harmonic drive was developed, including the wave generator, the flexible ball bearing, the flexible spline and the circular spline. Finite element analyses were performed to observe which parameter from the harmonic drive geometry parameter group affects the lost motion value most. The analyses were carried out using 4% of the rated harmonic drive output torque by the locked wave generator and fixed circular spline according the requirements for the high accuracy harmonic drive units. The described approach was applied to two harmonic drive units with the same ratio, but various dimensions and rated power were used to generalize and interpret the global sensitivity analysis results properly. The most important variable was for both harmonic drives the offset from the nominal tooth shape.

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Enhance Derivative Design Considering Global Sensitivity of Design Parameters

Proceedings of the Canadian Engineering Education Association (CEEA) ◽

10.24908/pceea.v0i0.4810 ◽

2013 ◽

Author(s):

Hyeong-UK Park ◽

Kamran Behdinan ◽

Joon Chung ◽

Jae-Woo Lee

Keyword(s):

Sensitivity Analysis ◽

Design Process ◽

Life Cycle Cost ◽

Global Sensitivity Analysis ◽

Collaborative Optimization ◽

Design Parameters ◽

Fast Method ◽

Engineering Product ◽

Global Sensitivity ◽

Design Variables

An engineering product design considers derivatives to reduce the life cycle cost and to increase the efficiency on operation when it has new demands. The proposed design process in this study obtains derivative designs based on sensitivity of design variable. The efficiency and accuracy of the derivative design process can be enhanced by implementing global sensitivity analysis. Sensitivity analysis sensors the design variables accordingly and variables with low sensitivity for objective function can be neglected, since computational effort and time is not necessary for a design with less priority. In this research, e-FAST method code for global sensitivity analysis module was developed and implemented on Multidisciplinary Design Optimization (MDO) problem. The wing design was considered for MDO problem that used aerodynamics and structural disciplines. The global sensitivity analysis method was applied to reduce the number of design variables and Collaborative Optimization (CO) was used as MDO method. This research shows the efficiency of reduction of dimensionality of complex MDO problem by using global sensitivity analysis. In addition, this result shows important design variables for design requirement to student when they solving design problem.

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The Effects of Structural Parameter Variation on Cable Force of Fast Cable-Net Structure

Advances in Mechanical Engineering ◽

10.1155/2014/912158 ◽

2014 ◽

Vol 6 ◽

pp. 912158

Author(s):

Qiming Wang ◽

Peng Jiang ◽

Xu Kong

Keyword(s):

Sensitivity Analysis ◽

Global Sensitivity Analysis ◽

Structural Parameters ◽

Element Model ◽

Design Parameters ◽

Structural Parameter ◽

Global Sensitivity ◽

Fatigue Stress ◽

Cutting Length ◽

Cable Force

Five-hundred-meter aperture spherical radio telescope (FAST) is supported by a cable-net structure, which enables its surface to form a real-time paraboloid by active control. FAST project is currently in the construction and implementation stage. However, there are always a considerable amount of errors that existed in practice which may result in the deviation of the structure from its ideal model or design. Therefore, structural parameter sensitivity analysis was discussed, which is indispensable. However, such deformation operation would lead to about 500 MPa of fatigue stress variation amplitude in the cable-net structure. Optimized deformation strategy is proposed to release the fatigue stress of the cable-net structure, which would be of advantage to improve the reliability of the cable-net structure. In the paper, the variation ranges of structural parameters were rationally determined. Based on local sensitivity analysis and global sensitivity analysis method, finite element model was used to study the effect of different structural parameters on the static behavior. It can be concluded that the effect of several key design parameters such as the cutting length and the elastic modulus of cable on the cable force is significant. The global sensitivity analysis indicates that the cable force range of the cable-net is −19% to 27%.

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Parameter Sensitivity and Reliability Analysis for Construction Control of Cable-Net Structure Supporting the Reflector of FAST

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.529 ◽

2013 ◽

Vol 671-674 ◽

pp. 529-533

Author(s):

Xu Kong ◽

Qi Ming Wang ◽

Chuan Jia Liu ◽

Zhong Yi Zhu

Keyword(s):

Sensitivity Analysis ◽

Global Sensitivity Analysis ◽

Structural Parameters ◽

Element Model ◽

Parameter Sensitivity ◽

Tension Force ◽

Design Parameters ◽

Structural Parameter ◽

Global Sensitivity ◽

The Impact

Five-hundred-meter Aperture Spherical radio Telescope (FAST) is supported by cable-net structure, which enables its surface to form a paraboloid in real time under active control. FAST is now entering project construction and implement stage, however there are always a considerable amount of errors existed in practice which would result in the deviation of the structure from its ideal model. Therefore, structural parameter sensitivity analysis was indispensable discussed. In the paper, the variation ranges of structural parameters were rationally determined. Base on local sensitivity analysis and global sensitivity analysis method, Using the finite element model investigated the influence of different structural parameters change on the static behavior, gets the conclusions that the impact of several key design parameters on the tension force of cable-net is large. The results indicate that of all types of the structural parameters, the error of the length of cable plays the most important role, and the global sensitivity analysis indicates that the tension force range of cable-net is -18% to 27%.

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