Urban Demons V 👻
城市鬼魂 V 👻
📷 Nikon F4E
🎞️ Rollei RPX 400
If you like my work, buy me a coffee from PayPal #filmphotography
Urban Demons VII 👻
城市鬼魂 VII 👻
📷 Zeiss IKON Super Ikonta 533/16
🎞️ Ilford HP5 400 Plus, expired 1993
If you like my work, buy me a coffee from PayPal https://www.paypal.com/paypalme/ydcdingsite
WeirNet: A Large-Scale 3D CFD Benchmark for Geometric Surrogate Modeling of Piano Key Weirs
Lisa L\"uddecke, Michael Hohmann, Sebastian Eilermann, Jan Tillmann-Mumm, Pezhman Pourabdollah, Mario Oertel, Oliver Niggemann
https://arxiv.org/abs/2602.20714 https://arxiv.org/pdf/2602.20714 https://arxiv.org/html/2602.20714
arXiv:2602.20714v1 Announce Type: new
Abstract: Reliable prediction of hydraulic performance is challenging for Piano Key Weir (PKW) design because discharge capacity depends on three-dimensional geometry and operating conditions. Surrogate models can accelerate hydraulic-structure design, but progress is limited by scarce large, well-documented datasets that jointly capture geometric variation, operating conditions, and functional performance. This study presents WeirNet, a large 3D CFD benchmark dataset for geometric surrogate modeling of PKWs. WeirNet contains 3,794 parametric, feasibility-constrained rectangular and trapezoidal PKW geometries, each scheduled at 19 discharge conditions using a consistent free-surface OpenFOAM workflow, resulting in 71,387 completed simulations that form the benchmark and with complete discharge coefficient labels. The dataset is released as multiple modalities compact parametric descriptors, watertight surface meshes and high-resolution point clouds together with standardized tasks and in-distribution and out-of-distribution splits. Representative surrogate families are benchmarked for discharge coefficient prediction. Tree-based regressors on parametric descriptors achieve the best overall accuracy, while point- and mesh-based models remain competitive and offer parameterization-agnostic inference. All surrogates evaluate in milliseconds per sample, providing orders-of-magnitude speedups over CFD runtimes. Out-of-distribution results identify geometry shift as the dominant failure mode compared to unseen discharge values, and data-efficiency experiments show diminishing returns beyond roughly 60% of the training data. By publicly releasing the dataset together with simulation setups and evaluation pipelines, WeirNet establishes a reproducible framework for data-driven hydraulic modeling and enables faster exploration of PKW designs during the early stages of hydraulic planning.
toXiv_bot_toot
Series D, Episode 12 - Warlord
TARRANT: Extent of damage, Orac? [pause, no response] Orac?
[Crew room. Tarrant enters and looks at Orac beneath the beam.]
[Shot of Zukan's ship in space, approaching another space ship.]
https://blake.torpidity.net/m/412/270 B7B4
The last 5 days have been a bit wild for the GCVE.eu initiative.
What started as steady work suddenly picked up real momentum:
The public GCVE.eu database instance - https://db.gcve.eu/ - caught the attention of the media, sparking discussions well beyond our usual circles
We publishe…
In case you were curious how the #SocialMediaBan is progressing: https://www.sbs.com.au/news/the-feed/article/australia-social-media-ba…
Urban Demons III 👻
城市鬼魂 III 👻
📷 Nikon F4E
🎞️ Rollei RPX 400
If you like my work, buy me a coffee from PayPal #filmphotography
#Blakes7 Series D, Episode 11 - Orbit
EGRORIAN: A short range relay, now I see how they worked it.
SERVALAN: A bit late in the day, Egrorian!
EGRORIAN: Not so! It means that Orac is still on board the shuttle. We'll be able to recover it after the crash.
Urban Demons IV 👻
城市鬼魂 IV 👻
📷 Zeiss IKON Super Ikonta 533/16
🎞️ Ilford HP5 400 Plus, expired 1993
If you like my work, buy me a coffee from PayPal https://www.paypal.com/paypalme/ydcdingsite
Series A, Episode 13 - Orac
CALLY: We should keep on moving, they could be right behind us.
BLAKE: Yes, without weapons we don't stand a chance. Look, you keep going. I'm going to stay here and try and bring the roof down - block them off.
https://blake.torpidity.net/m/113/347 …