heap_mass — DRIVE `granular` op

• Data kinds: scalar × scalar → scalar

• Call: import fullseye as fs; fs.ledger.heap_mass(volume: 'float', bulk_density: 'float') -> 'float' (to call the implementation directly, import granular; granular.heap_mass(volume: 'float', bulk_density: 'float') -> 'float'; from the registry, opsdrive.get("heap_mass"))

Usage

> This operator's description has not been translated yet. The original text follows as it is.

`m = ρ_b V [kg]。bulk_density` はかさ密度 [kg/m³] (粒子密度ではない —— ガラス球 2500 kg/m³ の

山は充填率 ≈ 0.6 で ρ_b ≈ 1500 kg/m³)。Raises `ValueError`: 体積が < 0、密度が ≤ 0。

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• poc_granular_heap_repose — py -3.11 examples/poc_granular_heap_repose.py

Ops the type connects to (they accept `scalar` as input)

spin_from_marker_sequence · carla_transform_matrix · carla_pose_to_world · carla_camera_pose · carla_xy_yaw · carla_scene_load · town_chain · osm_parse

Same category (`granular`)

heap_volume_cone · heap_volume_heightmap · beverloo_rate · beverloo_fit · discharge_synth · dispense_mass_from_video · hopper_discharge_rate · spoon_tilt_critical

*Provenance: granular.py — DRIVE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

heap_mass — DRIVE granular op