We present an experimental study of two coupled Duffing oscillators in which intermittent chaotic synchronization emerges when sweeping the excitation parameters of the second oscillator, while keeping (F₁, Ω₁) fixed and varying (F₂, Ω₂). We employ three complementary tools: (i) a direct comparison of x₁(t), x₂(t), and the synchronization error e(t), aligned using an optimal time delay τ*, to...
Finite, noisy records of a system response can conceal changes in response organization when only one
observable is measured and no complete model is available. We analyze experimental capacitor voltage
signals from a Duffing type circuit using fuzzy and thresholded recurrence methods in multiple windows across
the sweep of the excitation amplitude. Quantifiers of fuzzy proximity, recurrence...
Physics-informed neural networks (PINNs) are increasingly proposed for semiconductor device simulation, but none has yet computed the current–voltage characteristic of an illuminated solar cell or been compared on equal terms with a classical solver. We solve the full drift–diffusion system for a one-dimensional $n^+$–$p$ crystalline-silicon cell (180 µm thick, with SRH, Auger and radiative...
