Design and Implementation of a Highly Accurate Stochastic Spiking Neural Network
Bibliographic record
Abstract
The emergence of spiking neural networks (SNNs) provide a promising approach to the energy efficient design of artificial neural networks (ANNs). The rate encoded computation in SNNs utilizes the number of spikes in a time window to encode the intensity of a signal, in a similar way to the information encoding in stochastic computing. Inspired by this similarity, this paper presents a hardware design of stochastic SNNs that attains a high accuracy. A design framework is elaborated for the input, hidden and output layers. This design takes advantage of a priority encoder to convert the spikes between layers of neurons into index-based signals and uses the cumulative distribution function of the signals for spike train generation. Thus, it mitigates the problem of a relatively low information density and reduces the usage of hardware resources in SNNs. This design is implemented in field programmable gate arrays (FPGAs) and its performance is evaluated on the MNIST image recognition dataset. Hardware costs are evaluated for different sizes of hidden layers in the stochastic SNNs and the recognition accuracy is obtained using different lengths of stochastic sequences. The results show that this stochastic SNN framework achieves a higher accuracy compared to other SNN designs and a comparable accuracy as their ANN counterparts. Hence, the proposed SNN design can be an effective alternative to achieving high accuracy in hardware constrained applications.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".