Profile

Cover photo
Jingran Sui
Attended University of Electronic Science and Technology of China
6,912 views
AboutPostsPhotosVideos

Stream

Jingran Sui

Shared publicly  - 
 
 
For 2 out of every 3 people on earth, a fast, affordable Internet connection is still out of reach.  Today we are unveiling our latest moonshot from Google [x] - Project Loon: balloon-powered internet access. Learn more: goo.gl/3VUHC

#ProjectLoon
1
Add a comment...

Jingran Sui

Shared publicly  - 
 
 
The algorithm that automatically detects polyps in images from camera pills. "Mamonov and co’s algorithm uses two techniques for spotting polyps. One key difference between a polyp and healthy tissues is that it protrudes from its surroundings. So the algorithm homes in on protrusions in an attempt to spot frames that contain polyps. This is no simple task. The difficulty is to differentiate between a polyp and the many natural folds that occur in healthy tissue. To do this, the algorithm measures the curvature of the tissue using a sphere-fitting technique. The radius of the sphere that best fits the tissue fold is then a measure of the curvature."

"Another important feature of polyps is their texture, which tends to be much rougher than healthy tissue. So the algorithm automatically discards frames that have too little texture in them. However, this process is confounded by bubbles and froth in a frame which can make the image much more textured. So the algorithm also discards those frames with too much texture."

"So how well does this algorithm work?  Mamonov and co have put it through its paces on a data set consisting of almost 19,000 images, 230 of which containing polyps. In this test, the algorithm detected polyps correctly 47 per cent of the time (with a low rate of false positives)." "The 230 images of interest actually contained only 16 different polyps, of which the algorithm successfully spotted 13." (81%).
1
Add a comment...

Jingran Sui

Shared publicly  - 
 
Nice
 
Optical illusion

It's like that ...

http://i.imgur.com/1sRuXuT.gif
1
Add a comment...

Jingran Sui

Shared publicly  - 
 
 
Big O Cheat Sheet. Searching and sorting algorithms (time and space complexity), data structures (indexing, search, insertion, deletion), and graphs (storage, add/remove edge/vertex, query), classified as O(1), O(log n), O(n), O(n log n), O(n^2), O(2^n), and O(n!).
1
Add a comment...

Jingran Sui

Shared publicly  - 
 
 
This is really impressive, Kinect-like gesture recognition using just the subtle changes to WiFi signals from your motion.
1
Add a comment...

Jingran Sui

Shared publicly  - 
 
 
MobileEye doing autonomous driving with single camera on the highways of Israel
1
Add a comment...

Jingran Sui

Shared publicly  - 
 
 
About 14 years ago, I got a bad cold, and my voice became hoarse.  At the time I didn’t think much about it.  But my voice never fully recovered.  So I went to a doctor and was diagnosed with left vocal cord paralysis.  This is a nerve problem that causes your left vocal cord to not move properly.  Despite extensive examination, the doctors never identified a cause — though there was speculation of virus-based damage from my cold.  It is quite common in cases like these that a definitive cause is not found.

While this condition never really affected me — other than having a slightly weaker voice than normal which some people think sounded a little funny — it naturally raised questions in my mind about my second vocal cord.  But I was told that sequential paralysis of one vocal cord following another is extremely rare.  

Fast forward to last summer, when the same pattern repeated itself — a cold followed by a hoarse voice. Once again things didn’t fully improve, so I went in for a check-up and was told that my second vocal cord now had limited movement as well. Again, after a thorough examination, the doctors weren’t able to identify a cause.  

Thankfully, after some initial recovery I’m fully able to do all I need to at home and at work, though my voice is softer than before. And giving long monologues is more tedious for me and probably the audience.  But overall over the last year there has been some improvement with people telling me they think I sound better.  Vocal cord nerve issues can also affect your breathing, so my ability to exercise at peak aerobic capacity is somewhat reduced.  That said, my friends still think I have way more stamina than them when we go kitesurfing!  And Sergey says I’m probably a better CEO because I choose my words more carefully.  So surprisingly, overall I am feeling very lucky.

Interestingly, while the nerves for your vocal cords take quite different routes through your body, they both pass your thyroid.  So in searching for a cause for both nerves that was an obvious place to look. I was diagnosed with Hashimoto's thyroiditis in 2003.  This is a fairly common benign inflammatory condition of the thyroid which causes me no problems.  It is unclear if this is a factor in the vocal cord condition, or whether both conditions were triggered by a virus.

In this journey I have learned a lot more about voice issues.  Though my condition seems to be very rare, there are a significant number of people who develop issues with one vocal nerve.  In seeing different specialists, I met one doctor — Dr. Steven Zeitels from the Harvard Medical School and the Massachusetts General Hospital Voice Center — who is really excited about the potential to improve vocal cord nerve function.  So I’ve arranged to fund a significant research program through the Voice Health Institute, which he will lead.  Thanks a bunch to my amazing wife Lucy, for her companionship through this journey and for helping oversee this project and get it off the ground.  Also, thanks to the many people who have helped with advice and information many of whom I have not had a chance to thank yet.

Finally, we’ve put together a patient survey to gather information about other people with similar conditions.  As it’s fairly rare, there’s little data available today — and the team hopes that with more information they can make faster progress.  If you have similar symptoms you can fill it out here: voicehealth.org/ip
1
Add a comment...

Jingran Sui

Shared publicly  - 
 
 
My on-a-side project over last few days: Research Lei -- a new Academic Papers Management and Discovery System.

Maybe I'm doing it wrong, but exploring an area of research and getting a holistic understanding of a field (the most influential papers, authors, their relationships etc.) is a very tedious process. This project is my attempt to build an interface that facilitates this exploration.

The main UI allows you to quickly navigate the "web" of academic papers in a library that you can build over time. It allows multiple ways of sorting, exploring, and searching.
For now, additional tools inlcude a recommendation page that shows a ranked list of papers that are often referenced by papers in your library and a graph visualization of the co-author network in the area of research.

If anyone else is interested in this stuff, I put all code up on Github under BSD license: https://github.com/karpathy/researchlei

I don't think it's great at this point, but it's a first step toward something more reasonable than having nested folders of notes, pdfs, and spending hours googling various queries and seeing 10 results at a time.

http://cs.stanford.edu/people/karpathy/researchlei/
1
Add a comment...
People
Basic Information
Gender
Male
Education
  • University of Electronic Science and Technology of China
    Electronic Information Engineering, 2007 - 2011
Links