Inverse Problems in Science and Engineering最新文献_第5页

Reconstruction of refractive index maps using photogrammetry 利用摄影测量重建折射率图

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-07-01 DOI: 10.1080/17415977.2021.1946533

A. Miller, A. Mulholland, K. Tant, S. Pierce, B. Hughes, A. B. Forbes

{"title":"Reconstruction of refractive index maps using photogrammetry","authors":"A. Miller, A. Mulholland, K. Tant, S. Pierce, B. Hughes, A. B. Forbes","doi":"10.1080/17415977.2021.1946533","DOIUrl":"https://doi.org/10.1080/17415977.2021.1946533","url":null,"abstract":"Large volume metrology is a key enabler of autonomous precision manufacturing. For component positioning, the optical-based metrology technique of photogrammetry could be used more widely if its accuracy was improved. These positional measurements are subject to uncertainties which can be greater than manufacturing tolerances. One source of uncertainty is due to thermal gradients, which cause the refraction of the light rays in large-scale industrial environments. This paper uses light-based sensor data to reconstruct a heterogeneous spatial map of the refractive index in air. We use this reconstructed refractive index map to discount the refractive effects and thereby reduce the uncertainty of this positioning problem. This new inverse problem employs Voronoi tessellations to spatially parameterize the refractive index map, the Fast Marching Method to solve the forward problem of calculating the light rays through this medium, and a Bayesian approach in the inversion. Using simulated data, this methodology leads to positioning improvements of up to 37 .","PeriodicalId":54926,"journal":{"name":"Inverse Problems in Science and Engineering","volume":"29 1","pages":"2696 - 2718"},"PeriodicalIF":1.3,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17415977.2021.1946533","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42267715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Damage diagnosis of high-rise buildings under variable ambient conditions using subdomain approach 基于子域法的变环境条件下高层建筑损伤诊断

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-06-22 DOI: 10.1080/17415977.2021.1941922

K. Lakshmi, M. Keerthivas

{"title":"Damage diagnosis of high-rise buildings under variable ambient conditions using subdomain approach","authors":"K. Lakshmi, M. Keerthivas","doi":"10.1080/17415977.2021.1941922","DOIUrl":"https://doi.org/10.1080/17415977.2021.1941922","url":null,"abstract":"Tall structures, during their service lifetime, face many scenarios and are often prone to damages. Generally, static or dynamic measurements from the entire structure are used while formulating the Structural Health Monitoring (SHM) techniques for damage diagnosis. In this paper, an output-only damage diagnostic technique using the decentralized concept (subdomain-based) for high-rise buildings, employing the Vector form of the Autoregressive with exogenous input (VARX) model is developed. Vector version of the ARX model is preferred, as the vector models are more effective in detecting/localising the damage, when compared to the scalar models, due to their capability to predict the signals from a group of sensors per trial. In this work, the dynamic equation of motion associated with a building model is recast into the form of the VARX model, aiding to the decentralised damage diagnostic algorithm. New damage indices have been proposed to handle the inevitable confounding factors like environmental and operational variabilities (EoV), apart from measurement noise, to avoid false-positive alarms. The effectiveness of the proposed subdomain based damage diagnostic technique and its robustness to environmental/operational variabilities and measurement noise, are illustrated using the synthetic time-history responses of a 25-storey framed structure and the responses from a ten-storey experimental steel framed structure.","PeriodicalId":54926,"journal":{"name":"Inverse Problems in Science and Engineering","volume":"29 1","pages":"2579 - 2610"},"PeriodicalIF":1.3,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17415977.2021.1941922","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48667231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Quasi-3D inverse design of S-shaped diffuser with specified cross-section distribution; super-ellipse, egg-shaped, and ellipse 给出了一种具有特定截面分布的S形扩压器的拟三维反设计方法；超椭圆、卵形和椭圆

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-06-22 DOI: 10.1080/17415977.2021.1943382

A. Madadi, M. Nili-Ahmadabadi, M. Kermani

引用次数: 3

Localization of impact on box mechanical structure by the method of modal parameters extraction combined with K-means clustering 结合k均值聚类的模态参数提取方法对箱体机械结构的冲击定位

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-06-14 DOI: 10.1080/17415977.2021.1940164

Zhenfeng Huang, Dahuan Wei, H. Mao, Xinxin Li, Weili Tang, Kuangchi Sun, Xun Qian

引用次数: 0

Inverse estimation of temperature-dependent refractive index profile in conductive-radiative media 导电性辐射介质中温度相关折射率曲线的逆估计

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-06-06 DOI: 10.1080/17415985.2021.1932872

H. Shafiee, S. M. Hosseini Sarvari

{"title":"Inverse estimation of temperature-dependent refractive index profile in conductive-radiative media","authors":"H. Shafiee, S. M. Hosseini Sarvari","doi":"10.1080/17415985.2021.1932872","DOIUrl":"https://doi.org/10.1080/17415985.2021.1932872","url":null,"abstract":"The aim of this paper is to retrieve the temperature-dependent refractive index distribution in parallel-plane semi-transparent media with combined conduction-radiation heat transfer, by the measurement of exit intensities over the boundaries. The finite volume method in combination with the discrete ordinates method is used to solve the energy equation. The results of the direct solution for both linear-spatially and linear-temperature-dependent refractive index distributions are compared and the effects of the main parameters are examined. The results confirm a remarkable difference between the results for spatially and temperature-dependent refractive index profiles. Finally, the refractive index profile is estimated using the conjugate gradient method in an inverse manner. The coefficients of the linear profile are estimated for three cases with different levels of measurement errors; 1%, 3% and 5%. The results show that the temperature-dependent refractive index distribution can be retrieved in a good range of errors for noisy data.","PeriodicalId":54926,"journal":{"name":"Inverse Problems in Science and Engineering","volume":"29 1","pages":"2516 - 2533"},"PeriodicalIF":1.3,"publicationDate":"2021-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17415985.2021.1932872","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45216234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

New method to interpret the ‘canister test’ data for determining kinetic parameters of coalbed gas: theory and experiment 解释煤层气动力学参数“罐式试验”数据的新方法：理论和实验

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-06-06 DOI: 10.1080/17415985.2021.1936516

A. Karchevsky, Leonid Nazarov, L. Nazarova

{"title":"New method to interpret the ‘canister test’ data for determining kinetic parameters of coalbed gas: theory and experiment","authors":"A. Karchevsky, Leonid Nazarov, L. Nazarova","doi":"10.1080/17415985.2021.1936516","DOIUrl":"https://doi.org/10.1080/17415985.2021.1936516","url":null,"abstract":"The nonlinear model has been developed and implemented to describe gas emission from coal slack placed in a sealed container (‘canister test’). The model accounts for initial gas content S, coefficients of diffusion D, mass transfer β and desorption kinetics γ, as well as for fractional composition of the sample. Using the developed analytical method of the initial boundary value problem solution, it is found that the pressure of gas in the container tends to a constant value with time. The inverse problem of determining the kinetic parameters S, D, β and γ of gas by the pressure readouts in the experiments has been formulated and subjected to solvability tests. The introduced objective function (discrepancy between and the calculated pressure) is almost independent of β. Based on the modification of the conjugate gradient method, the inverse problem algorithm is proposed. Using the data of in situ measurements of pressure in three containers, the authors perform quantification of gas content, as well as diffusion and desorption kinetics coefficients in terms of a coal bed in Berezovskaya Mine (Kuznetsk Coal Basin). The range of the mass transfer coefficient is estimated by the results of the grain-size analysis of the test samples.","PeriodicalId":54926,"journal":{"name":"Inverse Problems in Science and Engineering","volume":"29 1","pages":"2551 - 2560"},"PeriodicalIF":1.3,"publicationDate":"2021-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17415985.2021.1936516","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43549495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of lightning location using measured induced voltage obtained from distribution power networks 用配电网测得的感应电压评价雷电定位

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-05-12 DOI: 10.1080/17415977.2021.1914602

M. Izadi, M. Kadir, M. Osman, M. Hajikhani

{"title":"Evaluation of lightning location using measured induced voltage obtained from distribution power networks","authors":"M. Izadi, M. Kadir, M. Osman, M. Hajikhani","doi":"10.1080/17415977.2021.1914602","DOIUrl":"https://doi.org/10.1080/17415977.2021.1914602","url":null,"abstract":"Lightning location is a significant issue in the protection of transmission lines, renewable energy sources, and electrical equipment. In this article, a new technique for the determination of lightning striking points is been proposed. This method is depending on measured values of lightning-induced voltage obtained from distribution power lines in the vicinity of the lightning channel. The proposed method considers lightning location as well as lightning current wave shape at the channel base. It was validated using a number of measured return stroke currents, and the outcomes are debated accordingly. All electromagnetic field components were taken into consideration in the proposed method, and lightning current wave shape was determined in contrast with the other, widely used methods. Evaluated lightning current wave shapes, based on local measured data, can be used to examine and improve existing protection schemes in renewable energy generation farms, transmission lines, and other power sites. Moreover, lightning maps and ground flash density can be obtained from the evaluated lighting location data to be used in lightning risk assessment studies.","PeriodicalId":54926,"journal":{"name":"Inverse Problems in Science and Engineering","volume":"29 1","pages":"2288 - 2305"},"PeriodicalIF":1.3,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17415977.2021.1914602","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43592564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Active manipulation of Helmholtz scalar fields in an ocean of two homogeneous layers of constant depth 在两层均质恒定深度的海洋中主动操纵亥姆霍兹标量场

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-05-09 DOI: 10.1080/17415977.2021.1918688

N. J. A. Egarguin, D. Onofrei, Chaoxian Qi, Jiefu Chen

引用次数: 1

Non-contact detection of single-cell lead-acid battery electrodes’ defects through conductivity reconstruction by magnetic induction tomography 磁感应层析成像电导率重建的单芯铅酸电池电极缺陷非接触检测

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-05-04 DOI: 10.1080/17415977.2021.1918127

Shujian Tang, Guogang Zhang, Lijia Ge, Zhengxiang Song, Yingsan Geng, Jianhua Wang

{"title":"Non-contact detection of single-cell lead-acid battery electrodes’ defects through conductivity reconstruction by magnetic induction tomography","authors":"Shujian Tang, Guogang Zhang, Lijia Ge, Zhengxiang Song, Yingsan Geng, Jianhua Wang","doi":"10.1080/17415977.2021.1918127","DOIUrl":"https://doi.org/10.1080/17415977.2021.1918127","url":null,"abstract":"The change of electrodes’ conductivity is a crucial parameter during battery aging process, non-contact detection of battery electrodes’ defects through conductivity reconstruction is an innovative technology. In this paper, the magnetic induction tomography (MIT) was applied to reconstruct the conductivity of electrodes, the simplified battery models with complete and broken electrodes were chosen as target A and target Brespectively, and an eight-channel MIT system was designed to measure the change of mutual induced voltage. A method of computing the forward problem called ‘A·E’ was adopted to compute the coefficient matrix for the forward problem and the frequency 12.665kHz was chosen as the excitation frequency. Based on the conductivity reconstruction images, relative errors of reconstructed conductivity and objective function, ‘A·E’ method exhibited advantages in terms of computation time and accuracy compared to coefficient sensitivity method with the simulation data. In order to test the accuracy of ‘A·E’ method, data measured by MIT system was applied in the inverse problem with four regularization parameter selection methods. L-curve criterion and generalized cross-validation criterion identified defects successfully as they were more sensitive to the change of conductivity.","PeriodicalId":54926,"journal":{"name":"Inverse Problems in Science and Engineering","volume":"29 1","pages":"2470 - 2490"},"PeriodicalIF":1.3,"publicationDate":"2021-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/17415977.2021.1918127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44698156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Cornering stiffness estimation using Levenberg–Marquardt approach 利用Levenberg-Marquardt方法估计转弯刚度

IF 1.3 4区工程技术

Inverse Problems in Science and Engineering Pub Date : 2021-05-04 DOI: 10.1080/17415977.2021.1910683

C. Pereira, Ricardo Teixeira da Costa Neto, B. Loiola

引用次数: 2