Little Stuffs

• Arrhythmia annotation for ECG cloud by brand-new deep network...

  2017.01-2017.12 Designed a new structure in TF to detect common arrhythmia on ECG signal. One first authored IEEE conference paper.

  keywords: Healthcare; Python; Deep learning; CNN; RNN; Residual Network; VAE; ECG; Arrhythmia

• Failure part predicting based on log data...

  2017.07-2017.12 Several deep learning models are established to predict failure part in CT, based on error code pattern and error message in log. The model gains over 80% accuracy in CV test. The best one is wrapped up in docker image and delivered to customer.

  keywords: Healthcare; Python; Deep learning; RNN; Encoder-Decoder; TextCNN; Discrete event chain; Natural Language Processing (NLP)

• Lung Nodule CT Dataset Profiling...

  2017.04-2017.06 Profiling LIDC database, to quantify the radiometrics characters distribution and help modeling team in collecting data.

  keywords: Healthcare; R; Matlab; Smoothing; Density estimation; Data quality control

• Welllift Digital Solution Test Metrics...

  2016 Proposed and designed statistic analytic metrics to test optimization models for well lift solution. Get internal Above & Beyond award from stakeholder for my work in this project

  keywords: Oil & Gas; Python; Statistic Test

• Downhole hydrocarbon and gas species detection...

  2015-16 Designed and developed computational FEM model to simulate the acoustic signal, when gas bubbles are present in the transmission path; Designed the signal processing algorithm and machine learning model for downhole hydrocarbon and gas species detection; First authored one filed patent; Designed the test container and conducted the laboratory test to verify the algorithm. Get internal Above & Beyond award from stakeholder for my work in this project.

  keywords: Oil & Gas; Ultrasound; Scattering from gas bubble; FEM-Modeling/Multiphysics-Coupling; COMSOL Multiphysics; Signal Processing; Machine Learning

• U/S Velocimetry for Downhole Drilling...

  2014 Designed laboratory experiments and computational FEM model to study the acoustic signal attenuation by drilling fluid, the estimated coefficients are further used for time gain compensation (TGC) in U/S machine; Designed and developed computational model to simulate the thermal isolation by coupling material before the U/S probe; Designed and developed pulse compression method and first authored one IEEE conference paper.

  keywords: Oil & Gas; Ultrasound; Attenuation in transmission material; Pulse-Coding; FEM-Modeling/Multiphysics-Coupling; Signal Processing; COMSOL Multiphysics; Abersim; Matlab

• Automation control...

  2014-16 Designed and developed prototype for re-branding C# framework, which is the core component for GE next generation control software tool-chain at that time, successfully transferred to Edmonton team; Designed and developed migration tool using Python and C# to automatically import legacy control logic (ST and Ladder) from Proficy Machine Edition into new C# automation framework; Evaluated and demonstrated unit test, auto-documentation and language model in C# framework; Designed and developed web/HTML application prototype to compose web HMI for PLC in small footprint, and successfully demonstrated in Control Symposium in 2016. Win the CTO Physical & Digital Integration Award in 2016 for my contribution in this series of projects.

  keywords: C#; CodeSys; Python; ST; Ladder; Unit Test; WebHMI; HTML/CSS; Javascript/AJAX

• Study on U/S Twinkling Artifacts...

  2012-14,16 Studied the twinkling sign from micro-calcifications in tissue in Bflow mode image, and one first authored SCI publication.

  keywords: Healthcare; Ultrasound; B-Mode/BFlow-Mode; Scattering from solid particle; Acoustic radiation force; Signal processing; Design of Experiment; Matlab; FEM-Modeling/Multiphysics-Coupling; COMSOL Multiphysics

• Motion artifacts removing algorithm...

  2012.03-2012.04 A temporary project for supporting the release of the stress ECG device by restraining the motion artifacts in the field experiment. I designed the annotation algorithm for detecting the P-QRS-T peaks and corresponding begin-end pairs. Thus different filter could be used on these chuncks. The annotation results is compared with the output of Chesnokov Yuriy algorithm. And the whole algorithm package including annotation part is integrated into new product.

  keywords: Healthcare; Signal Processing; Filtering; ECG

• A cross domain solution for sharing/interpreting/management of medical information for rural clinic affiliation...

  2011.10-2012.04 In this project, I explored the unmet user requirement, proposed a potential technique solution, and built a platform for demonstrations, which includes following functionalities: a) User authentication and authorization based on RBAC, b) Patient ADT management, report management and raw medical data management, c) data publishing/subscribing service based on SOA.

  keywords: Healthcare; HTML/CSS; Javascript/AJAX; PHP; Apache; MySQL; JSON/XML/XSLT/WSDL/SOAP

• Screening solution for earlier detection of peripheral artery disease (PAD)...

  2010.09-2011.12 In this project, I designed an algorithm to automatically estimate the systolic blood pressure from biosignal on the sensor, and meanwhile, control the inflation/deflation procedure based on the feedback of algorithm. The algorithm was integrated into the device by a 2 months cooperation with colleagues in NY, then verified in a volunteer test with the reported accuracy larger than 90%. Besides the main duty in algorithm, I leaded the design of cuff regulation module, and documentation for SFDA registration.

  keywords: Healthcare; Signal Processing; Ultrasound; Doppler; Matlab

• CardiacSimu Tool Suite...

  2009.07-now focus on cardiacsimu, a 3D computational electrophysiologic model for cardiac electrophysiological study. The model has only 2 atria now. The special conduction system, Nygren cell model and ARP/CV restitution are encluded. With this model, you can simulate sinus rhythm as well as the Atrial fibrillation. And investigate the propagation of the activation wavefront in isochronic manner. In this model, OpenGL is used to build the investigation UI, boundary element method (BEM) as well as 3D including test are introduced in the numerical analysis.

  keywords: Healthcare; Electrophysiology; Atrial Fibrillation; Computational Cardiac Modeling; Boundary Element Method; C++; OpenGL; GNU Tools (make etc); Linux

• PS3/UMD Tool Suite...

  2007.11-2008.04 enroll into the PS3 stream toolkits V5 development in Sony Shanghai Technical Center as a software developer and experience the standard procedure in developing a software product (version control, unit test, RUP...). PS3 stream utilities, including PS3/UMD StreamComposer, PS3/UMD StreamMultiplexer and PS3/UMD StreamViewer, are mainly used in game development. Six software engineers have been engaged in this project for half year. My duty was designing and implementing a library to parse and compose PAMF file in these utilities.

  keywords: C++; Microsoft Foundation Class Library (MFC); Unified Modeling Language (UML); Rational Unified Process (RUP)

• I/O for SD Card in AVR...

  2007.07 in a external AED project, and my duty was implementing a component in firmware on AVR MCU, in order to provide the high level I/O functions for recording patient data onto a SD card, see here. The FAT16 table and the MBR on SD card could be accessed through these bunch of functions.

  keywords: C; Firmware; FAT16; SD Card

• TestBench for SSM2600...

  2007.01-2007.02 focus on developing a test utility of SSM2600 (a mix signal chip) in Analog Devices Shanghai Ltd. This utility can read and write SSM2600's register through an SPI and I2C interface.

  keywords: C++; SPI; I2C

• CardiacMap Tool Suite...

  2006.01-2009.04 focus on cardiac map suite. This utility set is a substantial part of the epicardial mapping system, usually used in EP lab for AF studying purpose. The 3D interpolation algorithm used in this utility is the main topic of my final thesis in Fudan University.

  keywords: Healthcare; C++; Microsoft Foundation Class Library (MFC); Interpolation; Electrophysiology; Atrial Fibrillation; Cardiac Mapping; Signal Processing; Wavelet; Iso-potential and Iso-chronic map

• CardiacMap Hardware Platform...

  2005.10-2006.01 data acquisition module in epicardial mapping system, focus on the hardware, firmware and USB driver, see here. Epicardial mapping system is used in clinic studies on cardiac arrhythmia. Signals received from the electrode on the cardiac epicardial surface are processed by an amplifier set, data acquisition card, and then stored in a PC through a USB port for further studying.

  keywords: Healthcare; PCB Layout; 80C51; Firmware; Window Driver Model (WDM); USB; A/D