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Test-time Fourier Style Calibration for Domain Generalization [article]

Xingchen Zhao, Chang Liu, Anthony Sicilia, Seong Jae Hwang, Yun Fu
2022 arXiv   pre-print
To solve the dilemma of having no access to the target domain during training, we introduce Test-time Fourier Style Calibration (TF-Cal) for calibrating the target domain style on the fly during testing  ...  While many domain generalization (DG) methods have achieved promising results, they primarily rely on the source domains at train-time without manipulating the target domains at test-time.  ...  In this paper, we propose a novel yet simple method called Test-time Fourier Style Calibration (TF-Cal) to calibrate the target style features at inference-time.  ... 
arXiv:2205.06427v2 fatcat:psfpgjjbnjfz3blrpun2zbqdzq

Instantaneous phase shifting deflectometry

Isaac Trumper, Heejoo Choi, Dae Wook Kim
2016 Optics Express  
The surfaces in (a) are the measured surface maps for all three methods, shown in (b) are the difference maps between the labeled methods, and (c) is the line profile data for all three methods corresponding  ...  An instantaneous phase shifting deflectometry measurement method is presented and implemented by measuring a time varying deformable mirror with an iPhone R 6.  ...  The authors would also like to acknowledge the II-VI Foundation Block-Gift Program for helping support general deflectometry research in the LOFT group.  ... 
doi:10.1364/oe.24.027993 pmid:27906366 fatcat:7p5sl5von5aflgri2s6om6dulu

On Calibration Neural Networks for extracting implied information from American options [article]

Shuaiqiang Liu, Álvaro Leitao, Anastasia Borovykh, Cornelis W. Oosterlee
2020 arXiv   pre-print
For this, a generic and robust calibration framework, the Calibration Neural Network (CaNN), is introduced to estimate multiple parameters.  ...  For the implied dividend yield, we formulate the inverse problem as a calibration problem and determine simultaneously the implied volatility and dividend yield.  ...  Damien Ackerer for fruitful discussions.  ... 
arXiv:2001.11786v1 fatcat:tshbwlfzynapvbcxoog6fzkblm

Measurement of Antennas and Microwave Components Using Time-Domain Reflectometry of a Voltage Impulse

Steven McCabe, Jonathan Scott
2011 IEEE Microwave and Wireless Components Letters  
A recent study proved antennas could be accurately measured in the time-domain using a step-function time-domain reflectometer (TDR), without the need for an anechoic chamber.  ...  An impulse generator is employed in place of the step generator in a TDR set-up.  ...  ACKNOWLEDGEMENT The authors wish to acknowledge the support of Agilent Technologies Component Test Division for the supply and detailed support of equipment.  ... 
doi:10.1109/lmwc.2011.2169450 fatcat:rr4dcp23qrcnvhiqnrvv7ayqpm

Discrimination Mode Processing for EMI and GPR Sensors for Hand-Held Land Mine Detection

K.C. Ho, L.M. Collins, L.G. Huettel, P.D. Gader
2004 IEEE Transactions on Geoscience and Remote Sensing  
Signal processing algorithms for hand-held mine detection sensors are described.  ...  Search mode generates an initial detection at a suspected location and discrimination mode confirms that the suspected location contains a land mine.  ...  Broach for their support of this research. In addition, the authors thank W. Steinway, H. Duvoisin, G. Solomon, and K. Johnson for providing data and technical insights. Finally, the authors thank J.  ... 
doi:10.1109/tgrs.2003.817804 fatcat:yapr2q6tgnf7jmuqch3d2vmufa

Instantaneous phase mapping deflectometry for dynamic deformable mirror characterization

Isaac Trumper, Heejoo Choi, Pascal Hallibert, Tony B. Hull, Dae Wook Kim
2017 Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems  
Deflectometry has a high dynamic range, enabling the full range of surfaces generated by the DM to be measured.  ...  This ability is useful for other dynamic freeform metrology applications that utilize the DM as a null component.  ...  helping support general deflectometry research in the LOFT group.  ... 
doi:10.1117/12.2272188 fatcat:oh4xijarprdnlmhizr2v4tkmpi

Domain-invariant Feature Exploration for Domain Generalization [article]

Wang Lu, Jindong Wang, Haoliang Li, Yiqiang Chen, Xing Xie
2022 arXiv   pre-print
Domain generalization (DG) enables a model to generalize to an unseen test distribution, i.e., to learn domain-invariant representations.  ...  We further design an exploration loss to increase the feature diversity for better generalization.  ...  ., 2021) utilized Fourier amplitude (style) to calibrate the target domain style on the fly. However, it required some operations when testing.  ... 
arXiv:2207.12020v1 fatcat:hg47mscxt5ddbgff6ko6perfa4

Simulation of non-stationary stochastic ground motions based on recent Italian earthquakes

Fabio Sabetta, Antonio Pugliese, Gabriele Fiorentino, Giovanni Lanzano, Lucia Luzi
2021 Bulletin of Earthquake Engineering  
Among the different techniques for the generation of ground motion records, we focused on the methods based on stochastic simulations, considering the time- frequency decomposition of the seismic ground  ...  simulated time series.  ...  Acknowledgements The authors would like to thank Francesca Pacor for the fruitful discussion in the preparation of this work, and the reviewers for the useful comments which significantly helped to improve  ... 
doi:10.1007/s10518-021-01077-1 fatcat:escd4dutmbe4xipmuiestpqbsa

Detection of apple firmness with a novel loudspeaker-based excitation device

Chengqiao Ding, 1. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China, Dachen Wang, Zhe Feng, Di Cui, 2. Key Laboratory of On Site Processing Equipment for Agricultural Products, Ministry of Agriculture, Hangzhou 310058, China
2021 International Journal of Agricultural and Biological Engineering  
Besides, the proper posture style was that the apple was placed with its stem upward.  ...  Through Fast Fourier Transform (FFT), these signals were transformed from the time domain to the frequency domain, and their ratio was regarded as the frequency response function (FRF), and the unit of  ...  Figure 7 7 Figure 7 Signal-to-Noise ratio (SNR) of the response signals in the time domain at different structure parameters Figure 8 Figure 9 89 Figure 8 Response signals in the frequency domain for  ... 
doi:10.25165/j.ijabe.20221501.7028 fatcat:o3qycfkvz5g4fc3w6y7noef5ky

Review for Examining the Oxidation Process of the Moon Using Generative Adversarial Networks: Focusing on Landscape of Moon

Jong-Chan Kim, Su-Chang Lim, Jaehyeon Choi, Jun-Ho Huh
2022 Electronics  
CIPS can generate pixels independently for each color value, and since it uses a Multi-Layer Perceptron (MLP) network rather than spatial convolutions, there is a significant advantage in scalability.  ...  It is concluded that the proposed methodology will save time and costs of the existing research in progress and will help reveal the causal relationship more clearly.  ...  As a result of the experiment, 92% of the test data that humans created was restorable [16] .  ... 
doi:10.3390/electronics11091303 doaj:db7454e8159d4196b35621fc1a13cddf fatcat:5cht2teipna2xcezkhqmgi7gne

Valuing Convertible Bonds with Stock Price, Volatility, Interest Rate, and Default Risk

Pavlo Kovalov, Vadim Linetsky
2008 Social Science Research Network  
any time prior to maturity.  ...  In practice, a practitioner would have a difficult time ascertaining any precise numerical value for the value of the firm, not to mention the difficulties in estimating its process parameters, such as  ...  the European-style convertible bond can be computed in the affine framework by Fourier inversion (see the Appendix).  ... 
doi:10.2139/ssrn.1113385 fatcat:ydj7zyul4vdqvhumirhz3vvaxi

Recent Advances in Analog, Mixed-Signal, and RF Testing

Kwang-Ting (Tim) Cheng, Hsiu-Ming (Sherman) Chang
2010 IPSJ Transactions on System LSI Design Methodology  
As a result, design for testability (DfT), combined with automatic test stimuli generation, has gradually become a necessity to ensure test quality at an affordable cost.  ...  This paper provides an overview of cost-effective test techniques that either enhance circuit testability, or enable built-in self-test (BIST) for integrated AMS/RF frontends.  ...  Hence, instead of striving for voltage-domain resolution, designers have shifted toward time-domain resolution for various designs.  ... 
doi:10.2197/ipsjtsldm.3.19 fatcat:ta4eaij36vft7f6qkjvxbmpz4u

An Indoor Positioning Error Correction Method of Pedestrian Multi-Motions Recognized by Hybrid-Orders Fraction Domain Transformation

Chao Li, Zhong Su, Qing Li, Hui Zhao
2019 IEEE Access  
And acquire the feature vector through feature extraction by the hybrid-orders fraction domain transformation.  ...  At the same time, the best horizontal error positioning result is only 1.72 m during the total travel distance of 412.40 m (TTD ≈ 0.42%).  ...  The system error calibration method is to VOLUME 7, 2019 establish an accurate system error model, design complete calibration tests and use precise test equipment to identify the correlation coefficient  ... 
doi:10.1109/access.2019.2891512 fatcat:lfbzxyqje5crtajsscd3isxsze

A Novel Pricing Method for European Options Based on Fourier-Cosine Series Expansions

F. Fang, C. W. Oosterlee
2009 SIAM Journal on Scientific Computing  
Here we develop an option pricing method for European options based on the Fourier-cosine series, and call it the COS method.  ...  The key insight is in the close relation of the characteristic function with the series coefficients of the Fourier-cosine expansion of the density function.  ...  Acknowledgments: The authors would like to thank Roger Lord (Rabobank, London), Mike Staunton (London Business School) and Hans van der Weide (Delft University of Technology) for fruitful discussions.  ... 
doi:10.1137/080718061 fatcat:nwtfrv6e5bbvthldnegcjqlkpu

Just Shake Them Together: Imitation-Resistant Secure Pairing of Smart Devices via Shaking

Congcong Shi, Lei Xie, Chuyu Wang, Peicheng Yang, Yubo Song, Sanglu Lu, Zhipeng Cai
2021 Wireless Communications and Mobile Computing  
Based on this study, we have listed several novel observations and extracted important clues for key generation.  ...  In this paper, we propose an imitation-resistant secure pairing framework including authentication and key generation for smart devices, by shaking these devices together.  ...  Figures 2(b)-2(d) further show the sensor data in the frequency domain, which is obtained from fast Fourier transformation (FFT) over the raw sensor data in the time domain.  ... 
doi:10.1155/2021/6668478 fatcat:nyxhul4lybegthvv5tutz6nfci
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