Video Streaming & Thunder, VanDyke, NetAnts, etc.

How long haven’t you used Thunder? It was so popular on PC, like Tencent. Tencent is still there, while Thunder is gone. Now most on line videos are provided in streaming way.

FFMPEG.exe is a tool to download them. It runs in command line:
ffmpeg -i http://***/***.m3u8 “***.mp4”
And there is a better tool to do such streaming, which is N_m3u8DL-CLI_v2.9.7.exe

How to find the streaming address? Press F12 when you watch video via browser; locate “network” and search for “m3u8”
By this way, you are able to download most videos as long as you are able to watch them in your browser.

While sometimes, there is inhibition for you to complete full streaming, then you need to merge the “.ts” files by yourself.
Way 1
copy /b *.*    output.mp4
Way 2
DIR *.*  /B >filelist.txt
Open filelist.txt using Excel; insert one column before the column of file name; save as txt.
ffmpeg -f concat -safe 0 -i filelist.txt -c copy output.mp4

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Smart DC Power Supply and Roll Polling Program

The first EKG (E-board) in China:

Zhuang, Y.F., Zou, W., Wang, Z., Tan, X., Hu, P., Hu, S., Yan, Y., Wang, Y., 2012. Electrically conductive PVD. Chinese Patent. Grant Number: ZL201210197981.4.

The first field trial using E-board in China:

Zhuang, Y.F., Huang, Y., Liu, F., Zou, W., Li, Z., 2014. Case study on hydraulic reclaimed sludge consolidation using electrokinetic geosynthetics. In: 10th International Conference on Geosynthetics. DGGT, Berlin, Germany.

After the field trial, it was found that power requirement, instead of energy consumption, is the biggest challenge for field application using electro-osmosis. And I believe this is the case for most applications using electrokinetic technique in Geo.

Zhuang, Y.F., 2015. Challenges of electro-osmotic consolidation in large scale application. In: Conference of Geosynthetics 2015. IFAI, Portland, Oregon, USA, pp. 447–449.

Therefore, I have been focusing on Smart DC Power Source and looking for a way to reduce both power requirement and energy consumption. Roll Polling Program seems to be a solution. It reduces the requirement of current intensity to 1/3; it also decreases the energy consumption to less than 1 kW⋅h/m3. Following contents are direct quote from the publication:

Zhuang, Y.F., 2021. Large scale soft ground consolidation using electrokinetic geosynthetics. Geotext. Geomembranes 49 (2021) 757–770.

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