What is parameter efficient fine tuning?5 answersParameter-efficient fine-tuning (PEFT) is a technique used to adapt pre-trained language models to specific tasks or domains while minimizing computational requirements. Traditional fine-tuning involves retraining the entire set of parameters, which can be computationally expensive. PEFT methods selectively fine-tune a small subset of additional parameters, significantly reducing the computational requirements for domain adaptation. These methods achieve promising performance and stability by imposing sparsity on the model, which acts as a regularization technique and improves generalization capability. Different approaches exist for choosing the tunable parameters, including random, rule-based, and projection-based methods. Additionally, techniques such as adapter layers and sparse masks have been proposed to further enhance parameter efficiency. PEFT has been successfully applied in various domains, including task-oriented dialogue systems and clinical applications.
How is Tuning natural language processing models ?4 answersFine-tuning natural language processing (NLP) models involves training a pre-trained language model on a large text corpus and then refining it on specific downstream tasks. However, fine-tuning often leads to overfitting and poor generalizability due to the model's complexity and limited training samples. To address this, several approaches have been proposed. Hang Hua et al. introduce Layerwise Noise Stability Regularization (LNSR), which injects noise and regularizes hidden representations of the fine-tuned model. Sadhika Malladi et al. investigate the use of Neural Tangent Kernel (NTK) to describe the fine-tuning process of pre-trained language models. They extend the NTK formalism to Adam and propose an explanation for the success of parameter-efficient subspace-based fine-tuning methods. Additionally, prioritizing informative training data can improve fine-tuning performance while using fewer labels. This can be achieved by augmenting the language model with an epinet, which estimates model uncertainty and prioritizes uncertain data.
How to optimise ANFIS model?5 answersTo optimize an ANFIS model, several approaches can be used. One approach is to use hybrid optimization algorithms such as particle swarm optimization (PSO) and whale optimization algorithm (WOA) to tune the parameters of the ANFIS model. Another approach is to use the output of Taguchi design of experiment (DOE) matrix to train the ANFIS model and then use the rules of the ANFIS model for multiobjective optimization. Additionally, the ANFIS model can be trained with different data sets and optimized using machine learning algorithms such as genetic algorithm (GA). Furthermore, a modified ANFIS model called AO-ANFIS can be developed using a new optimization algorithm called the Aquila Optimizer (AO). These approaches aim to improve the performance and accuracy of the ANFIS model for various applications.
How to optimize unscented kalman filter tuning?5 answersThe tuning of the unscented Kalman filter (UKF) can be optimized using various approaches. One approach is to frame the tuning problem as an optimization problem and solve it using a stochastic search algorithm or a standard model-based optimizer. Another approach is to treat the tuning of the parameters that govern the unscented transform (UT) as an optimization problem and propose a tuning algorithm based on ideas of the bootstrap particle filter. Additionally, a new adaptive algorithm based on moment matching has been proposed to adaptively tune the scaling parameter of the UKF. These approaches aim to improve the performance of the UKF by finding optimal values for the parameters and enhancing its adaptability.
How can we optimize the performance of our system?5 answersTo optimize the performance of a system, there are several approaches that can be taken. One approach is to systematically explore the design space of the system and evaluate different combinations of parameter values to identify those that result in good performance. Another approach is to use statistical analysis to monitor the value of target parameters during the execution of logic code and determine target values based on changes in these parameters. Additionally, performance monitors can be used to gather thread performance data and analyze it to determine if additional CPU time is needed to optimize system performance. Furthermore, a risk-based analysis can be conducted to evaluate the system over time, including the human operator as a component, and assess performance using risk-based approaches. By employing these methods, it is possible to improve the overall performance of a system.
What is the best way to tune hyperparameters?4 answersThe best way to tune hyperparameters is by adopting established best practices from AutoML, such as the separation of tuning and testing seeds, as well as principled hyperparameter optimization (HPO) across a broad search space. This approach has been shown to significantly affect the agent's final performance and sample efficiency in deep reinforcement learning (RL). Comparisons between multiple state-of-the-art HPO tools and hand-tuned counterparts have demonstrated that HPO approaches often have higher performance and lower compute overhead. Additionally, efficient formulas to compute the gradient and hessian of approximate leave-one-out cross-validation have been derived, allowing for the application of second-order optimizers to find hyperparameters. It is important to note that hyperparameter optimization is more nuanced than previously believed, and the specific optimizers that should be endorsed remain to be seen.