Combination Response Surface Modeling for Sparse Interaction Data
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Solution Overview
Problem
Machine learning techniques face challenges in predicting combined effects of items due to high dimensionality, incomplete data, experimental variation, and inconsistent model performance, particularly when dealing with drug combinations and interactions across chemical space, dose, biological models, and biological responses.
Innovation Solution
A computer system employs a computational model trained using data representing researched items, incorporating techniques like interpolation, uncertainty modeling, and prior information to predict combined effects of items, ensuring predictions are within a physically likely range and accounting for experimental error.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dense experimental sampling is performed to obtain comprehensive data for training machine learning models, then prediction accuracy improves, but labor and cost increase significantly
Solution Approach 1:
The patent applies preliminary action by using active learning to selectively identify the most informative experiments to perform first. The system prioritizes experiments that will provide maximum information gain for model training, rather than performing dense sampling across all possible conditions. This allows the model to achieve good predictive performance with a smaller, more strategically selected set of experiments, reducing both labor and cost while maintaining prediction accuracy.
2Adaptability or versatility
If machine learning models are trained to predict combined effects of multiple items, then the ability to handle high dimensionality improves, but model complexity and training difficulty increase
Solution Approach 1:
The patent applies segmentation by decomposing the complex high-dimensional prediction problem into multiple manageable components. The system uses separate models or model components for different aspects of the prediction task, such as handling different types of item combinations or different response dimensions separately. This modular approach makes the overall system more tractable while maintaining the ability to handle high dimensionality through composition of simpler models.
3Loss of information
If experimental data is collected across multiple dimensions including chemical space, interactions, dose, and biological responses, then comprehensiveness of training data improves, but data sparsity and incomplete sampling worsen
Solution Approach 1:
The patent applies feedback through active learning loops where the machine learning model continuously evaluates its own predictive uncertainty and uses this information to guide subsequent experiment selection. The system identifies regions of chemical space or combination spaces where predictions are most uncertain and prioritizes experiments in those regions. This feedback-driven approach efficiently fills data gaps and reduces sparsity by focusing experimental resources on the most informative under-sampled regions, improving comprehensiveness without requiring exhaustive sampling.
Data Source
AI summary
A computational model outputs, and allows supervision based on, a set of values representing a response manifold representing a combined effect of two items together. The set of values can be a matrix of values sampling the response surface, or set of parameters of a function representing the response surface A matrix of known values for researched items can be used as supervisory information during training, either directly or indirectly by conversion into parameters representing the response surface. A matrix of values representing the combined effect of researched items may be incomplete. This information can be processed to complete the set of values, or to generate a parameterized representation of the response surface. The computational model can be constructed to include parameters representing uncertainty associated with the measurements of combined effects. Multiple computational models can be used. A form of ensembling can be used to combine the outputs of multiple models.


