58,161 Hits in 9.9 sec

Shear wave velocity prediction using seismic attributes and well log data

Raoof Gholami, Ali Moradzadeh, Vamegh Rasouli, Javid Hanachi
2014 Acta Geophysica  
Even if shear data is available, the logging programs provide only sparsely sampled one-dimensional measurements: this information is inadequate to estimate reservoir rock properties.  ...  The aim of this paper is to use seismic attributes for prediction of shear wave velocity in a field located in southern part of Iran.  ...  one-by-one, and re-estimating their values based on the model selected.  ... 
doi:10.2478/s11600-013-0200-7 fatcat:mboshbtfwbhkxdcicszkynuski

Gravitational lensing formalism in a curved arc basis: A continuous description of observables and degeneracies from the weak to the strong lensing regime [article]

Simon Birrer
2021 arXiv   pre-print
quantify the lensing information extracted in a model-independent way.  ...  We quantify what degeneracies can be broken based on specific assumptions on the local lensing nature and assumed intrinsic source shape.  ...  for extracting general lensing constraints.  ... 
arXiv:2104.09522v2 fatcat:qtw6nodf7bhanmr5btqtzmtsoy

Shearlets as Feature Extractor for Semantic Edge Detection: The Model-Based and Data-Driven Realm [article]

Héctor Andrade-Loarca, Gitta Kutyniok, Ozan Öktem
2019 arXiv   pre-print
Our approach is based on a combination of the model-based concept of shearlets, which provides probably optimally sparse approximations of a model-class of images, and the data-driven method of a suitably  ...  This is based on the fact that edges in images contain most of the semantic information. Semantic edge detection involves two tasks, namely pure edge detecion and edge classification.  ...  Discussion of Numerical Experiments We observed in the numerical experiments an improvement on edge extraction and classification performance when using the shearlet transform for model-based feature extraction  ... 
arXiv:1911.12159v1 fatcat:hebhvk7sgjc6toglbbk2syjto4

Extracting more than two orthogonal derivatives from a Shack-Hartmann Wavefront Sensor

Bastien Rouzé, Georges Giakoumakis, Adrien Stolidi, Julien Jaeck, Cindy Bellanger, Jerome Primot
2020 Optics Express  
The demonstration is based on a simple model of the SHWFS, taking into account the microlens array as a whole and linking the SHWFS to the multi-lateral shearing interferometry family.  ...  centroid or by taking into account the first two harmonics of the Fourier transform.  ...  According to the SHWFS model, based on Ronchi comparison and Ref.  ... 
doi:10.1364/oe.413571 pmid:33726059 fatcat:4lzxa3ts3rey5bhbev3ioobljq

Low-dimensional representation of near-wall dynamics in shear flows, with implications to wall-models

P. J. Schmid, T. Sayadi
2017 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
Based on a triple decomposition into mean, coherent and incoherent motion and a dynamic mode decomposition to recover statistical information about the incoherent part of the flow field, a driven linear  ...  In particular, models based on system and control theory have shown promise.  ... 
doi:10.1098/rsta.2016.0082 pmid:28167578 fatcat:myliv577bnh6zjdnugkaa6ltdi

Feature-based Supervision of Shear Cutting Processes on the Basis of Force Measurements: Evaluation of Feature Engineering and Feature Extraction

F. Hoppe, J. Hohmann, M. Knoll, C. Kubik, P. Groche
2019 Procedia Manufacturing  
This paper presents and discusses a mathematical model for capacity management based on different costing models (ABC and TDABC).  ...  Under the concept of "Industry 4.0", production processes will be pushed to be increasingly interconnected, information based on a real time basis and, necessarily, much more efficient.  ...  KG for providing the progressive tool.  ... 
doi:10.1016/j.promfg.2019.06.164 fatcat:52lltie7jzftxivayel7atoooi

Nondestructive Testing of Mechanical Properties of Bamboo–Wood Composite Container Floor by Image Processing

Zhilin Jiang, Yi Liang, Zihua Su, Aonan Chen, Jianping Sun
2021 Forests  
The performance measures show the strong generalization of the SVM models.  ...  Artificial neural network (ANN) models were developed and support vector machine (SVM) models were constructed for comparative study by taking the characteristic parameters of image processing as input  ...  Informed Consent Statement: Not Applicable. Conflicts of Interest: The authors declare that they do not have any conflict of interest.  ... 
doi:10.3390/f12111535 fatcat:5lwdxtlhtnbyhmhdnh5ymfwa7q

Two-Step Affine Transformation Prediction for Visual Object Tracking

Weiwei Zheng, Huimin Yu, Zhaohui Lu
2021 IEEE Access  
The training samples for on-line filter model update are transformed to the same pose, and they help the learnt filter to represent the object better than non-aligned samples.  ...  The designed features contain the information of affine transformation which makes the learning of non-linear mapping function possible.  ...  The aligned filter model provides information of translation, shear, and aspect ratio change. While the log-Polar model provides information of scaling and rotation.  ... 
doi:10.1109/access.2021.3056469 fatcat:ilqop7m6bbepbkqsqtd77i7y3y

Personal Identification Based on Deep Learning Technique Using Facial Images for Intelligent Surveillance Systems

Van-Huy Pham, Information Technology Department, Ton Duc Thang University, Vietnam., Diem-Phuc Tran, Van-Dung Hoang
2019 International Journal of Machine Learning and Computing  
This study proposes a solution for human identification based on the human face recognition in images extracted from conventional cameras at a low resolution and quality.  ...  Our proposed approach for human identification is based on a deep learning method for feature extraction and classification for human identification using a similarity estimation.  ...  This research focuses on identity recognition based on face information which is extracted from surveillance cameras.  ... 
doi:10.18178/ijmlc.2019.9.4.827 fatcat:asrdgwor3jb4xmhd24tq2pq6de

A Multi-linear CCD Image Correction Method

Hanfei Kuang, Jiexin Pu, Lei Zhang, Zhonghua Liu, Bo Peng
2016 International Journal of Future Generation Communication and Networking  
Secondly, we use Radon transform to detect angle of inclination of traveling distorted image captured by line scan cameras based on the results of edge detection, using shear transformation to correct  ...  This paper presents an image correction method for multi linear CCD.  ...  Firstly, extract edge information of standard image and the image to be corrected with Sobel differential operator, measure inclination angle of distorted image based on the results of edge detection by  ... 
doi:10.14257/ijfgcn.2016.9.10.25 fatcat:ohigrseljzdptdajcfzd7oci74

On the Efficiency of the Multi-Channel Analysis of Surface Wave Method for Shallow and Semi-Deep Loose Soil Layers

Kasgin Khaheshi Banab, Dariush Motazedian
2010 International Journal of Geophysics  
Sixteen sites were examined to evaluate the capability of the active and passive MASW methods for cases where the shear wave velocity(Vs)contrast between very loose soil (Vs< 200 m/s) and very firm bedrock  ...  MASW method to distinguish the high shear wave velocity contrast in the study area.  ...  Acknowledgments The authors thank Natural Sciences and Engineering  ... 
doi:10.1155/2010/403016 fatcat:ptryfe3czjbhxhwdi7etwlg2xy

Image interpolation using shearlet based sparsity priors

H. Lakshman, W.-Q Lim, H. Schwarz, D. Marpe, G. Kutyniok, T. Wiegand
2013 2013 IEEE International Conference on Image Processing  
(c) extracting high frequency information from the approximation and adding it to the initial estimate.  ...  For the sparse modeling, a shearlet dictionary is chosen to yield a multiscale directional representation.  ...  On an av-erage, a PSNR improvement of 0.64 dB is achieved compared to the 8-tap linear model for the considered test images.  ... 
doi:10.1109/icip.2013.6738135 dblp:conf/icip/LakshmanLSMKW13 fatcat:h4phojljargb5l46sc7bddr5ce

Towards digital reconstruction of fossil crania and brain morphology

2015 Anthropological Science  
restored, as soft tissues such as the brain are generally not fossilized.  ...  Restoration of the brain morphology of fossil crania therefore necessitates correct assembly of the available fragments, eliminating distortions, and compensating for missing parts as a first step.  ...  Acknowledgments We wish to express our sincere gratitude to Takeru Akazawa (Kochi Institute of Technology) for giving us the opportunity to participate in this research project and for his unstinting guidance  ... 
doi:10.1537/ase.141109 fatcat:6kxftqnwjzakdnlg7u7bvhyofi

Broadband-excitation-based mechanical spectroscopy of highly viscous tissue-mimicking phantoms [article]

Magdalena A. Urbańska, Sylwia M. Kolenderska, Sophia A. Rodrigues, Sachin S. Thakur, Frédérique Vanholsbeeck
2021 arXiv   pre-print
Here, we present a new broadband wave analysis based on two-dimensional Fourier Transformation.  ...  Our method allows for high-frequency mechanical spectroscopy, which could be used to investigate the local-scale dynamics of different biological tissues and the influence of diseases on their microstructure  ...  Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.  ... 
arXiv:2110.10134v1 fatcat:ax52qaiy55dlfjcy2insd3q6ji

Shear-wave velocity structure of the shallow sediments in the Bohai Sea from an ocean-bottom-seismometer survey

Yuan Wang, Zhiwei Li, Qingyu You, Tianyao Hao, Jian Xing, Lihua Liu, Chunlei Zhao, Xuelei Li, Litian Hu, Paul Somerville
2016 Geophysics  
We also estimated the uncertainty in shear-wave velocity structure based on the pseudo-2D profiles from six trial inversions with different initial models, which suggested a velocity uncertainty less than  ...  The shear-wave velocity of 200 − 300 m∕s in the top 100 m of the Bohai seafloor may provide important information for offshore site response studies in earthquake engineering.  ...  The partial derivatives of the Scholte-wave phase-velocity dispersion with respect to the shear-wave velocities for each layer were calculated based on the initial 1D model.  ... 
doi:10.1190/geo2015-0417.1 fatcat:dyrtsly7pfc6dbnatgzbac5nge
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