Jiajia Han

ORCID: 0000-0003-1311-8166
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About
Contact & Profiles
Research Areas
  • Engineering Diagnostics and Reliability
  • Machine Fault Diagnosis Techniques
  • Fault Detection and Control Systems
  • Topic Modeling
  • Advanced Image Processing Techniques
  • Gear and Bearing Dynamics Analysis
  • Advanced Malware Detection Techniques
  • E-commerce and Technology Innovations
  • Advanced Image Fusion Techniques
  • Liver Disease Diagnosis and Treatment
  • Educational Technology and Assessment
  • Innovative Educational Techniques
  • Network Security and Intrusion Detection
  • Natural Language Processing Techniques
  • Education and Learning Interventions
  • Mechanical Failure Analysis and Simulation
  • Information and Cyber Security
  • Birth, Development, and Health
  • Remote Sensing and LiDAR Applications
  • Multimedia Communication and Technology
  • Anomaly Detection Techniques and Applications
  • Network Packet Processing and Optimization
  • Advanced Vision and Imaging
  • Adipose Tissue and Metabolism
  • Advanced Graph Neural Networks

Shanghai Electric (China)
2023-2024

Huashan Hospital
2023

Fudan University
2023

National Institute for Communicable Disease Control and Prevention
2023

Zhengzhou University
2017-2020

Academy of Military Transportation
2017-2018

Henan University of Engineering
2017

Zoucheng People's Hospital
2010

The diesel engine is a complex mechanical device, with the characteristics of multi-source, multi moving parts, work. For multi-component signal, it usually necessary to decompose into number single-component AM-FM signals, and each component analyzed extract amplitude frequency information. VMD essentially composed plurality adaptive Wiener filter has good noise robustness. Compared EMD, EEMD, CEEMDAN, LMD ITD, strong mathematical theory basis. At same time, rejects method recursive...

10.21595/jve.2018.19694 article EN Journal of Vibroengineering 2018-09-30

Variational mode decomposition (VMD) is a recently introduced adaptive signal algorithm with solid theoretical foundation and good noise robustness compared empirical (EMD). There lot of background in the vibration diesel engine. To solve problem, denoising based on VMD Euclidean Distance proposed. Firstly, multi-component, non-Gauss, noisy simulation established, decomposed into given number K band-limited intrinsic functions by VMD. Then distance between probability density function each...

10.20944/preprints201709.0158.v1 preprint EN 2017-09-29

The task of relation classification is an important pre-task in natural language processing tasks. Relation can provide a high-quality corpus for tasks such as machine translation, human–computer dialogue, and structured text generation. In the process digitalization standards, identifying entity relationship standard prerequisite formation subsequent knowledge. Only by accurately labeling between entities there be higher efficiency accuracy knowledge bases maps. This study proposes...

10.3390/app13127119 article EN cc-by Applied Sciences 2023-06-14

Variational mode decomposition (VMD) is a recently introduced adaptive signal algorithm with solid theoretical foundation and good noise robustness compared empirical (EMD). There lot of background in the vibration diesel engine. To solve problem, denoising based on VMD Euclidean Distance proposed. Firstly, multi-component, non-Gauss, noisy simulation established, decomposed into given number K band-limited intrinsic functions by VMD. Then distance between probability density function each...

10.21595/jve.2018.19276 article EN Journal of Vibroengineering 2018-08-14

The vibration signal of the engine contains strong background noise and many kinds modulating components, which is difficult to diagnose. Variational mode decomposition (VMD) a recently introduced adaptive algorithm with solid theoretical foundation good robustness compared empirical (EMD). VMD can effectively avoid endpoint effect modal aliasing. However, cannot eliminate random in signal, so decrement technique solve problem. Based on crankshaft bearing fault simulation experiment, four...

10.20944/preprints201803.0266.v1 preprint EN 2018-03-30

Repackaging applications as the main carrier of Android malware have caused huge losses to users. In addition, third-party application market that rely on is characterized by missing audits and lax supervision, which further encourages distribution repackaged applications. Most traditional repackaging detection approaches need a platform passively determine whether or not repackaged, has high false negative rate. order solve problem, this paper proposes an active approach for code repacking....

10.1109/controlo.2018.8439807 article EN 2018-06-01

10.17265/1539-8072/2019.09.005 article EN Sino-US English Teaching 2019-09-28

Objectives. The rapidly evolving organ failure and high short-run mortality of acute-on-chronic liver (ACLF) are inseparable from the role systemic inflammatory response. S100A8 S100A9 associated with excessive cytokine storm play a decisive part within process inflammation. We aimed to clarify them in predicting prognosis hepatitis B virus-related ACLF (HBV-ACLF). Methods. levels were analyzed plasma 187 transplant-free HBV-ACLF patients, 28 healthy controls 40 chronic (CHB) patients. mRNAs...

10.1155/2023/6164611 article EN cc-by Canadian Journal of Gastroenterology and Hepatology 2023-07-10

Motivated by the nation’s policy of Tri-networks integration, maturity technology platform, and user’s demand, more enterprises start to launch research smart TV. In order offer reference other TV enterprisers, status industry is presented in this thesis. The mode operation profitable Le TV·super TV, also discussed , as well underlying problems during its development.

10.1051/matecconf/201710005051 article EN cc-by MATEC Web of Conferences 2017-01-01

A method based on order tracking and Variational Mode Decomposition was proposed to solve the problem of non-stationarity background noise in vibration signal engine. For diesel engine crankshaft bearing fault Connecting rod gasoline engine, non-stationary time domain converted into a pseudo stationary angular tracking. Then reconstructed decomposed by several components VMD, component that contains information selected. The three-dimensional spectral array order, speed power spectrum...

10.21595/vp.2018.19902 article EN Vibroengineering PROCEDIA 2018-05-15

In diesel engine fault diagnosis, non-stationary vibration signal is easily disturbed by strong noise. view of the shortcomings empirical mode decomposition (EMD) and wavelet transform in de-noising, a de-noising method proposed, which Empirical Wavelet Transform (EWT) autocorrelation analysis. Taking advantages EMD transform, Fourier spectrum adaptively divided EWT, intrinsic components different frequency are extracted through constructed filter, can effectively eliminate modal aliasing...

10.21595/vp.2018.20101 article EN Vibroengineering PROCEDIA 2018-09-19

Existing satellite remote sensing images are often used to observe the fuzzy phenomenon of transmission line bodies. It is necessary enhance super-resolution, but traditional superresolution technology difficult obtain rich details and edge information towers. This paper proposes a multiscale enhancement method combining multi-map residual convolutional neural network wavelet transform solve these problems. Specifically, we first use directly take low-resolution image as initial input...

10.1109/cvidl51233.2020.00011 article EN 2020-07-01

Abstract The data point target on the satellite remote sensing image of transmission line is restricted by imaging equipment and conditions, which makes it difficult to guarantee clarity line. Image super-resolution technology aims recover high-resolution images from low-resolution improve detailed information itself, great significance for intelligent inspection hidden danger monitoring. Aiming at problems traditional methods relying multi-frame sequences reconstruction results are too...

10.1088/1742-6596/1848/1/012092 article EN Journal of Physics Conference Series 2021-04-01
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