8f43927575
examples/ is based on KasperskyLab/knp at 55470ed6 with local changes to the mnist-learn altai/blifat models, cuda-backend CMake and model_loader. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
62 lines
2.4 KiB
C++
62 lines
2.4 KiB
C++
/**
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* @file resource_from_weight.h
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* @brief Function for calculating resource from weight.
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* @kaspersky_support D. Postnikov
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* @date 03.02.2026
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* @license Apache 2.0
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* @copyright © 2026 AO Kaspersky Lab
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stdexcept>
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#include <string>
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#include <utility>
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/**
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* @brief Calculate synaptic resource value from weight parameters for resource-based plasticity.
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*
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* @details The transformation maps weight ranges to resource ranges while maintaining the inverse
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* relationship between weight and resource in resource-based models.
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*
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* The mathematical formula used is:
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* resource = (weight - min_weight) * (max_weight - min_weight) / ((max_weight - min_weight) - (weight - min_weight))
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*
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* This ensures that:
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* - Minimum weights map to low resource values
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* - Maximum weights map to high resource values
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*
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* @param weight current synaptic weight value to convert.
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* @param min_weight minimum allowable weight value for the range.
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* @param max_weight maximum allowable weight value for the range.
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*
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* @return calculated resource value for the given weight.
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*
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* @throws `std::logic_error` if weight is outside valid range or parameters are invalid.
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*/
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inline float resource_from_weight(float weight, float min_weight, float max_weight)
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{
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// Max weight is only possible with infinite resource, so we should select a value less than that.
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float eps = 1e-6;
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if (min_weight > max_weight) std::swap(min_weight, max_weight);
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if (weight < min_weight || weight >= max_weight - eps)
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throw std::logic_error(
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std::string("Weight should not be less than") + std::to_string(min_weight) + ", more than" +
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std::to_string(max_weight) + "or too close to it. Weight = " + std::to_string(weight));
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double diff = max_weight - min_weight;
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double over = weight - min_weight;
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return static_cast<float>(over * diff / (diff - over));
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}
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