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Lechen Zhang

@leczhang.bsky.social
17 followers 70 following 12 posts

CS PhD @UIUC | Prev. MSc @UMich & BEng @SJTU. Interested in #NLProc & #AI. leczhang.com

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Reposted by Lechen Zhang
Indu Panigrahi @indupanigrahi.bsky.social · 07/08/2026
📌 Do you have experience or professional interest engaging with an unfamiliar discipline or a discipline beyond your primary discipline? Complete this 10-15 minute survey! 👉 illinois.qualtrics.com/jfe/form/SV_... Eligibility criteria and compensation details in 🧵 cc: @talaugust.bsky.social
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Lechen Zhang @leczhang.bsky.social · 15/06/2026
1/ When chatbots remember something about you in “𝗽𝗲𝗿𝘀𝗼𝗻𝗮𝗹𝗶𝘇𝗲𝗱” answers, does it ever feel uncomfortable, offensive, or just unnecessary? 🚨 Our paper argues these misalignments reflects a deeper issue in LLM personalization: 𝗼𝘃𝗲𝗿-𝗿𝗲𝗹𝗶𝗮𝗻𝗰𝗲 𝗼𝗻 𝘀𝘆𝗻𝘁𝗵𝗲𝘁𝗶𝗰 𝘂𝘀𝗲𝗿𝘀 𝗮𝗻𝗱 𝗟𝗟𝗠 𝗷𝘂𝗱𝗴𝗲𝘀. 🧵👇
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Lechen Zhang @leczhang.bsky.social · 24/04/2026
🚨 𝙋𝙤𝙨𝙩𝙚𝙧 @ #ICLR2026 🇧🇷 🚨 Is your 𝘀𝘆𝘀𝘁𝗲𝗺 𝗽𝗿𝗼𝗺𝗽𝘁 actually optimal? 🚀 Catch me this Saturday (Apr 25) 3:15–5:45pm at Pavilion 3, Poster #1314 presenting 𝙎𝙋𝙍𝙄𝙂, an automatic genetic optimizer for system prompts! Come check it out and let's chat!
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Reposted by Lechen Zhang
David Jurgens @davidjurgens.bsky.social · 29/01/2026
This major release of my lab's annotation tool, Potato 2.0, was a long time in the making but I'm really excited by all the new features (and quality of life improvements). If you're doing data annotation of any kind, check it out. Need any other features? We'd love to hear from you too!
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Reposted by Lechen Zhang
David Jurgens @davidjurgens.bsky.social · 25/11/2025
I've been really impressed with the presentation modalities from NotebookLM. My former student @leczhang.bsky.social used it to make this really cool illustration of our SPRIG paper arxiv.org/abs/2410.14826 and I was blown away by the layout and design. Here's the illustration of the genetic alg...
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Reposted by Lechen Zhang
David Jurgens @davidjurgens.bsky.social · 01/03/2025
I'm grateful for the chance to write this and so impressed by all the amazing things scientists are doing in Central Illinois and the impact the NSF/NIH are having in my hometown. Many thanks to the folks at @sciencehomecoming.bsky.social for this initiave and all the resources to get started
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