Howard Su

170 posts

Howard Su

Howard Su

@csujun

Programmer from the large cluster to the small chip, Radio Amateur

Shanghai, China Katılım Ağustos 2011
177 Takip Edilen111 Takipçiler
floridanow1
floridanow1@floridanow1·
Grok actually agrees. The claim that China’s Three Gorges Dam slowed Earth’s rotation by 0.06 microseconds per day is true, per NASA’s 2005 calculations. The dam’s 42 billion-ton reservoir, raised 175 meters, redistributes Earth’s mass, increasing its moment of inertia and slightly slowing its spin, like a figure skater extending their arms.
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non aesthetic things
non aesthetic things@PicturesFoIder·
China’s Three Gorges Adam is so massive, it slowed Earth’s Rotation and increased our day by 0.06 microseconds
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Justin Peng
Justin Peng@fei666888·
Thanks to Phil Harman (VK6PH) for generously sharing his GPSDO design with me. I made a PCB to facilitate the construction. It is currently available as open source at the following link: rx-888.com/diy/gpsdo.html
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Howard Su
Howard Su@csujun·
@erogol @liuzhuang1234 Did you solve this? I am using DyT on minimind, a small test bed for LLM. I notice the same problem that loss is stuck high (around 5-6 in my case)
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Zhuang Liu
Zhuang Liu@liuzhuang1234·
New paper - Transformers, but without normalization layers (1/n)
Zhuang Liu tweet media
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Howard Su
Howard Su@csujun·
@JamesMelville Please post the whole table? Your message is sounding lie. How is the number of EU, US?
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James Melville 🚜
James Melville 🚜@JamesMelville·
China emits more CO2 than the rest of entire developed world combined. But hey, let’s blame cow burps instead.
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Howard Su
Howard Su@csujun·
@ryzerth @rigexpert When I working on Soapy, I created a better library now, which compiles both Windows and Linux. It is in the tree and will release soon.
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Ryzerth 🐲
Ryzerth 🐲@ryzerth·
@csujun @rigexpert Actually I'm not sure if it works fine on the laptop, tried it again and it's pretty random if it works or not. There's probably a messed up solder joint on the FX3.
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Ryzerth 🐲
Ryzerth 🐲@ryzerth·
The latest SDR++ nightly now contains support for the @rigexpert #FobosSDR. I've worked around the some hardware issues. The hardware sample rate is locked at 50MS/s or more, lower SRs are decimated in software. I found issues in the driver code, will submit fixes. #sdr #sdrpp
Ryzerth 🐲 tweet media
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Mark Ermolov
Mark Ermolov@_markel___·
Intel HW is too complex to be absolutely secure! After years of research we finally extracted Intel SGX Fuse Key0, AKA Root Provisioning Key. Together with FK1 or Root Sealing Key (also compromised), it represents Root of Trust for SGX. Here's the key from a genuine Intel CPU😀
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Howard Su
Howard Su@csujun·
Can tesla to ask the driver to confirm the door open if a car or bicycle is passing. @elonmusk #Tesla
Howard Su tweet media
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Howard Su
Howard Su@csujun·
@bbcchinese BBC是不是也去整理下伊拉克战争的数据,按时间一起看看比较下。
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BBC News 中文
BBC News 中文@bbcchinese·
乌克兰当局称,在马里乌波尔一个剧院被俄罗斯轰炸后,有平民从剧院的废墟中活着走出来,当地官员此前对BBC表示,在炸弹袭击之前,估计有1000到1200人在剧院里避难。 我们整理了乌克兰局势的最新情况。 bbc.in/3wgB51X
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Jerry
Jerry@Jery91845134·
@bbcchinese 战争罪犯普大帝早晚会被审判的
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𝓧𝓲𝓷 𝓛𝓲
𝓧𝓲𝓷 𝓛𝓲@delphij·
你一个I/O密集型应用吃那么多CPU是怎么回事?
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Howard Su
Howard Su@csujun·
Why does Tesla not offer a 360 degree parking view like most “modern” cars do? Hardware on Tesla car is far more than enough. #Tesla @elonmusk
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r00t
r00t@r2x0t·
#Tianhe1 S-band 2280MHz signal (thx @OK9UWU): Spread spectrum 3069000Bd BPSK (1023chip seq) Despreads to 40kbps BPSK, with 1/2 FEC, contains 8192bit CCSDS AOS frames with 4xRS(255,223). S/C ID is 0x30 (reg'd to JAXA!) Rest is just ENCRYPTED! More details: r00t.cz/Sats/Tianhe1
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Henning Paul
Henning Paul@hennichodernich·
Got ps2-gpio working on the Zynq PS GPIO. Full standalone operation!
Henning Paul tweet media
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Ben Krasnow
Ben Krasnow@BenKrasnow·
Today I learned that opamps can be arranged in parallel to reduce overall noise. Makes sense, I guess, but I've never seen it in a commercial design.
Ben Krasnow tweet media
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Zero-Cat
Zero-Cat@ZeroCat15·
Using this method, the RX888/888MKII can direct-sampling all range of FM broadcast band without using a down converter. However, it requires a high-performance BPF. sdr-prototypes.blogspot.com/2021/03/fm-ban…
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Taka
Taka@sdrfun·
RX888をLinuxで動かそうとlibsddcを試しているが、今ひとつうまく行かない。古いlibrf103ではうまく動くようだが、libsddc1.0.1ではclose()の時にFX3にRESETを送るところで失敗するし、v1.1.0では、callback関数が130回めに呼ばれたところでSEGVで死んでしまう。
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f5oeo - mastodon.radio/@f5oeo
f5oeo - mastodon.radio/@f5oeo@F5OEOEvariste·
2021 ...New year of serial debugging (if any on real life).
f5oeo - mastodon.radio/@f5oeo tweet media
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gangrenous green
gangrenous green@Brommmietze·
@csujun @otti_sat @giammaiot2 @csujun : I am seriously considering getting a RaspSDR. I wonder if you could recommend a reliable source which sells good quality hardware and if there is a source for working boards without a Raspberry Pi? I already have several Raspberries (3b+ and 4b). Thanks!
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