Visible to the public Biblio

Filters: Author is Zhang, Hong  [Clear All Filters]
2020-06-12
Gu, Feng, Zhang, Hong, Wang, Chao, Wu, Fan.  2019.  SAR Image Super-Resolution Based on Noise-Free Generative Adversarial Network. IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium. :2575—2578.

Deep learning has been successfully applied to the ordinary image super-resolution (SR). However, since the synthetic aperture radar (SAR) images are often disturbed by multiplicative noise known as speckle and more blurry than ordinary images, there are few deep learning methods for the SAR image SR. In this paper, a deep generative adversarial network (DGAN) is proposed to reconstruct the pseudo high-resolution (HR) SAR images. First, a generator network is constructed to remove the noise of low-resolution SAR image and generate HR SAR image. Second, a discriminator network is used to differentiate between the pseudo super-resolution images and the realistic HR images. The adversarial objective function is introduced to make the pseudo HR SAR images closer to real SAR images. The experimental results show that our method can maintain the SAR image content with high-level noise suppression. The performance evaluation based on peak signal-to-noise-ratio and structural similarity index shows the superiority of the proposed method to the conventional CNN baselines.

2020-05-18
Zhou, Wei, Yang, Weidong, Wang, Yan, Zhang, Hong.  2018.  Generalized Reconstruction-Based Contribution for Multiple Faults Diagnosis with Bayesian Decision. 2018 IEEE 7th Data Driven Control and Learning Systems Conference (DDCLS). :813–818.
In fault diagnosis of industrial process, there are usually more than one variable that are faulty. When multiple faults occur, the generalized reconstruction-based contribution can be helpful while traditional RBC may make mistakes. Due to the correlation between the variables, these faults usually propagate to other normal variables, which is called smearing effect. Thus, it is helpful to consider the pervious fault diagnosis results. In this paper, a data-driven fault diagnosis method which is based on generalized RBC and bayesian decision is presented. This method combines multi-dimensional RBC and bayesian decision. The proposed method improves the diagnosis capability of multiple and minor faults with greater noise. A numerical simulation example is given to show the effectiveness and superiority of the proposed method.