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JEDEC JESD51 2D BEM-derived junction-temperature lattice (8x8 = 64 nodes)

PARITYS2 · dim 64

No clear winner. The survival gap is under 10 percentage points and the balanced-score gap is under 0.05, so neither SolvSRK nor the best baseline clears the win threshold. Either works — choose on cost, licensing, or integration effort. All verdicts →

64D BEM-derived thermal lattice for a multi-die module. Each node is a junction sub-area with lateral conduction and parallel-R leak to ambient via the package floor Green's function. Constant-coefficient linear ODE -- LRDE row-1 GREEN.

Semiconductor & electronics

Problem definition

JEDEC JESD51 (1995/2008); BEM Green's function reduction

Canonical RHS excerpt from the registered callable used for this benchmark cell. Expand it to verify the state equations; it is not a standalone runnable fixture.

Show canonical RHS excerpt
def rhs(t: float, y: np.ndarray) -> np.ndarray:
    return A_csr @ y + b_arr
Parameters
  • A_csr = sparse_matrix(shape=(64, 64), nnz=288)
  • b_arr = [109.383333333, 109.383333333, 109.383333333, 109.383333333, 99.3833333333, 99.3833333333, …] [shape=(64,), min=99.3833333333, max=109.383333333]
Initial condition
y(0) = repeat(298.15, 64) [shape=(64,)]
Horizon
t ∈ [0, 2]

Canonical RHS excerpt captured from the same registered callable used for the published benchmark. Frozen closure values are summarized below; helper imports and solver settings are intentionally omitted.

Fingerprint

Spread: low

Default noise: none

Recommendation snapshot

Clean best: SolvSRK

Noisy best: SolvSRK

Coverage

14 solver arms · clean + 5 noise levels

Ranked on survival, precision, and speed

Versions & freeze

Methodology →
Freeze
2026-08-13
libsolvsrk
2.3.0
SciPy
1.14
SUNDIALS
CVODE (bundled backend)

20 seeds/cell default · 14 arms · TRL 4–5 · simulation-lab validated · this page: JEDEC JESD51 2D BEM-derived junction-temperature lattice (8x8 = 64 nodes) (jedec-jesd51-2d-bem-derived-junction-temperature-lattice-8x8-64-nodes)

Governed SolvTune benchmark freeze; per-arm medians only. RHS definitions and raw trial rows are not published.

Self-reported by Resonix Labs · not independently verified

Results matrix

Pick an objective and a noise level to rank all arms on survival, median SCD, median nfev, and median wall time. Medians across seeds.

Objective

Best overall trade-off of survival, precision, and speed.

Noise level

#SolverSurvivalSCDnfevWallScore
1SolvSRK
100%
11.269830 ms0.885
2SciPy RadauSciPy
100%
10.22979 ms0.861
3SciPy DOP853SciPy
100%
8.53743 ms0.822
4CVODE Adamsexternal
100%
8.526910 ms0.821
5SciPy RK45SciPy
100%
8.43443 ms0.819
6SciPy LSODASciPy
100%
8.34403 ms0.816
7Tsit5external
100%
8.2342696 ms0.813
8CVODE BDFexternal
100%
8.121811 ms0.811
9SciPy BDFSciPy
100%
8.02188 ms0.810
10SciPy RK23SciPy
100%
7.92363 ms0.808

At Clean, best balanced arm is SolvSRK.

Values are medians across seeds, measured by Resonix Labs on Resonix hardware and not independently verified; nfev and wall are on reference lab hardware (indicative). Under injected noise only SolvSRK and the SciPy arms are run. How we measure accuracy → · Verification status →

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Cite this page

Replace the access date. Pin the freeze ID and library versions when comparing against a later export. Cite it as what it is — a self-reported vendor benchmark, not an independently verified result. The note field says so; please keep it.

@misc{resonix_evidence_jedec_jesd51_2d_bem_derived_junction_temperature_lattice_8x8_64_nodes_2026,
  title        = {Resonix Evidence Portal: JEDEC JESD51 2D BEM-derived junction-temperature lattice (8x8 = 64 nodes)},
  author       = {{Resonix Labs (Canada) Inc.}},
  year         = {2026},
  howpublished = {\url{https://resonix.tech/evidence/problems/jedec-jesd51-2d-bem-derived-junction-temperature-lattice-8x8-64-nodes}},
  note         = {Self-reported vendor benchmark; internally generated by Resonix Labs and not independently verified. Accessed YYYY-MM-DD. Freeze 2026-08-13; libsolvsrk 2.3.0; SciPy 1.14.}
}

Related

TRL 4–5 · simulation-lab validated · 398 problems · 14 solver arms · clean + 5 noise levels

Freeze: 2026-08-13 · scipy 1.14 · libsolvsrk 2.3.0 · Methodology

Self-reported by Resonix Labs · not independently verified · Verification status