scispace - formally typeset
Search or ask a question

What are some effective techniques for parallelizing multi objective optimization processes to reduce computational times? 


Best insight from top research papers

Effective techniques for parallelizing multi-objective optimization processes to reduce computational times include the use of parallel computing methods . These methods leverage parallel architectures to conduct either synchronous or asynchronous processing, allowing for faster evaluations and improved efficiency. Additionally, incorporating a sliding time window based on parallel computing can help maintain population diversity and reuse evolutionary information, leading to quicker convergence in time-varying environments. Furthermore, employing a Parallel Dynamic Multi-Objective Evolutionary Algorithm (PDMOEA) has shown to enhance results in less execution time compared to sequential counterparts, especially when dealing with complex problems. Overall, these techniques demonstrate significant improvements in computational efficiency for multi-objective optimization tasks.

Answers from top 4 papers

More filters
Papers (4)Insight
The paper proposes Grey Wolf Optimization (GWO) and Oppositional-based Learning (OBL) integration to enhance convergence rates and solution accuracy, reducing computational time for multi-objective optimization processes.
Parallel Dynamic Multi-Objective Evolutionary Algorithm (PDMOEA) efficiently reduces computational times by utilizing parallel processing, improving objective space, minimizing time, and converging to optimal solutions.
The Multi-Objective Parallel Local Surrogate-assisted search (MOPLS) algorithm utilizes parallel computing, tabu mechanism, and asynchronous options to enhance efficiency in multi-objective optimization processes.
The paper suggests using a sliding time window based on parallel computing (STW-PC) to enhance multi-objective optimization by maintaining diversity and reducing computational time effectively.

Related Questions

What are the most effective techniques for code optimization in terms of execution time and memory usage?4 answersThe most effective techniques for code optimization in terms of execution time and memory usage encompass a variety of strategies. Compiler optimization methods play a crucial role in enhancing performance while minimizing resource utilization. Techniques such as analytical solutions, reduction in redundancy, and leveraging available resources significantly reduce execution times in tasks like phase calculations and Fresnel zone plate function calculations. Additionally, combining high-level optimizations with low-level, target-specific optimizations, such as vectorization using SIMD units, can lead to substantial speed-ups in deep learning workloads. Novel approaches like delayed multidimensional retiming and loop striping offer improved execution times and reduced code size in nested loop scenarios. Understanding the importance of efficient code writing and compiler-specific optimization algorithms can further enhance program efficiency.
What are common gpu optimisation methods for cfd?4 answersCommon GPU optimization methods for Computational Fluid Dynamics (CFD) include point granularity parallelization, shared memory parallel programming strategies, memory access optimization using registers and shared memory, asynchronous execution with mixed precision, and CPU/GPU heterogeneous parallelization. These methods aim to enhance performance by leveraging the parallel processing capabilities of GPUs, improving data locality, reducing memory access overhead, and optimizing computational efficiency. Techniques such as grid reordering, loop fusion, and multi-level memory access optimization have shown significant speed-ups in CFD simulations on GPUs, with speed-ups reaching up to 127 times compared to serial CPU versions. Additionally, utilizing CUDA and optimizing memory access forms have been crucial in achieving faster convergence and stable performance in GPU-accelerated CFD solvers.
What are the current advances in multi-objective optimization techniques for complex systems?4 answersMulti-objective optimization techniques for complex systems have seen significant advances in recent years. These techniques have been applied to various fields such as bioinformatics, wireless networks, natural language processing, image processing, and astronomy. The use of multi-objective evolutionary algorithms (MOEAs) has proven to be effective in solving these optimization problems. MOEAs help users quickly obtain the desired data from complex network data, improving efficiency. Additionally, the integration of simulation-based optimization methods has shown promising results in optimizing complex urban mass rapid transit systems. The proposed two-phase algorithm combines the covariance matrix adaptation evolution strategy with a multi-directional local search, outperforming other comparative approaches. Furthermore, the use of surrogate models and the Dempster-Shafer theory has been successful in improving the computational efficiency of multi-objective network robustness optimization. These advancements in multi-objective optimization techniques have opened up new possibilities for solving real-world problems and have paved the way for future research in this field.
How does parallel computing improve the efficiency of AI algorithms?5 answersParallel computing improves the efficiency of AI algorithms by leveraging the computational power of multiple processors or computing nodes to perform tasks in parallel. This allows for faster execution of algorithms and reduces training times. Neural algorithmic reasoners, for example, benefit from parallel implementations of searching, sorting, and finding strongly connected components, which not only reduce training times but also achieve superior predictive performance. In the case of deep neural networks (DNNs), parallelism is crucial for efficiently training large and complex models. Data Parallelism (DP) is commonly used but may be inefficient for DNNs with large-size parameters. Hybrid Parallelism (HP), which applies different parallel strategies on different parts of DNNs, offers more efficiency but requires advanced configurations. Automating the configuration of HP strategies can significantly improve training time performance, allowing AI researchers to focus more on algorithm research.
What are the most effective techniques for optimizing LSTM neural networks?4 answersOptimizing LSTM neural networks can be achieved through various techniques. One effective approach is to use swarm intelligence algorithms such as particle swarm optimization (PSO) and cuckoo search (CS) to optimize the hyperparameters of the LSTM model. Another technique is to employ derivative-free optimization techniques like Nelder-Mead or genetic algorithms to find the optimal hyperparameters for parallelized LSTM models. Additionally, the use of deep learning techniques like long short-term memory (LSTM) networks can be combined with data decomposition techniques such as fast Fourier transform (FFT) to improve the performance of the LSTM model. Furthermore, hardware optimization methodologies, such as tensor train (TT) decomposition, can be utilized to optimize the computational and power demands of LSTM models, resulting in improved efficiency and reduced power consumption. Finally, an adaptive step size self-organizing migration algorithm (AS-SOMA) can be employed to enhance the predictive performance of LSTM models.
Which are the state of the art methodologies for multi objective design optimization?5 answersMulti-objective design optimization methodologies include surrogate-model-based, multi-objective, multidisciplinary, single objective, and design of experiments methodologies. Genetic algorithms are commonly used in multi-objective optimization to minimize maximum battery temperature and spatial temperature gradients in battery thermal management systems (BTMSs). Probability-based multi-objective optimization with experiment design methodologies, such as orthogonal experimental design, response surface design, and uniform experimental design, have been applied in materials selection. Multimodal multi-objective evolutionary algorithms (MMEAs) have been proposed for obtaining all solutions for multimodal multi-objective problems (MMOPs). Different diversity-maintaining techniques have been utilized in MMEAs, and their performance has been compared on existing test suites. Multi-objective evolutionary algorithm based on decomposition (MOEA/D) is a state-of-the-art approach for multi-objective optimization. It has been developed with various components, including weight vector settings, sub-problem formulations, selection mechanisms, and reproduction operators, and has been applied in constraint handling, computationally expensive objective functions, preference incorporation, and real-world applications.

See what other people are reading

What are the current gaps in the implementation of blended learning strategies?
5 answers
Current gaps in the implementation of blended learning strategies include challenges such as unstable internet connections, high internet data consumption, limited meeting time constraints, lack of understanding among educators and students regarding technology use, uneven distribution of facilities for internet access, insufficient training for instructors, and obstacles related to internet, time, competence, and student personality. Additionally, there is a need for further investigations to address student, teacher, and institutional challenges in blended learning, highlighting the importance of formative assessment methods like expert reviews, one-on-one evaluations, and field testing to refine blended learning models and ensure their efficiency. Furthermore, gaps in research on blended learning emphasize the necessity for richer characterizations of face-to-face activities to support the development of finely tuned interventions and guide practice effectively.
What is the best hyperparameter tuning algorithm for LSTMs and BERT??
10 answers
Determining the "best" hyperparameter tuning algorithm for Long Short-Term Memory (LSTM) networks and BERT (Bidirectional Encoder Representations from Transformers) models involves considering various approaches and their effectiveness in optimizing model performance. For LSTMs, the introduction of two new algorithms for hyperparameter tuning alongside a fast Fourier transform (FFT)-based data decomposition technique has shown significant improvements in forecasting solar energy, with a notable increase in fitness and reduction in RMSE, suggesting a tailored approach for time series data like that generated by LSTMs. Particle Swarm Optimization (PSO) has also been applied to LSTM models, demonstrating its capability to minimize error prediction through effective hyperparameter selection, which includes optimization of weights, activation functions, and learning rates, thereby enhancing LSTM performance. On the other hand, for models like BERT, which are not explicitly covered in the provided contexts but share similarities with deep learning architectures discussed, techniques such as the Adaptive Teaching Learning Based (ATLB) Heuristic could potentially be adapted. This heuristic has been shown to identify optimal hyperparameters across various network architectures, including RNNs and LSTMs, by evaluating performance improvements on multiple datasets. Additionally, the Cost-Aware Pareto Region Bayesian Search (CARBS) presents a promising approach for tuning large models by performing local search around the performance-cost Pareto frontier, which could be particularly relevant for computationally intensive models like BERT. Moreover, the exploration of hyperparameter tuning using ConvLSTM, a variant of LSTM, suggests that methods such as grid search, Bayesian optimization, and genetic algorithms can be effective, with the potential for adaptation to BERT models given their deep learning foundation. The use of grammatical evolution for hyperparameter tuning further supports the notion of a flexible, model-agnostic approach that could benefit both LSTM and BERT models by allowing for the definition of custom search spaces. In conclusion, while there is no one-size-fits-all algorithm for hyperparameter tuning across all models, the effectiveness of specific algorithms like FFT-based techniques and PSO for LSTMs, and potentially ATLB Heuristic and CARBS for BERT-like models, highlights the importance of matching the tuning approach to the model's unique characteristics and computational demands.
Is hyperband a great hyperparameter tuning algorithm for deep neural networks?
9 answers
Hyperband is recognized as a state-of-the-art method for hyperparameter optimization (HPO) that has shown considerable promise in the domain of deep neural networks (DNNs) due to its efficiency and theoretically provable robustness. Its design, which leverages low-fidelity observations to quickly identify promising configurations before using high-fidelity observations for confirmation, makes it particularly suited for the computationally intensive task of tuning DNNs. However, Hyperband is not without its limitations, such as the need for a predefined maximal budget, which, if set too low, necessitates a complete rerun of the algorithm, thus wasting valuable computational resources and previously accumulated knowledge. To address some of these limitations and enhance the performance of Hyperband, researchers have proposed modifications and alternative approaches. For instance, HyperJump introduces model-based risk analysis techniques to accelerate the search process by skipping the evaluation of low-risk configurations, thereby offering significant speed-ups over HyperBand. Another variant, PriorBand, incorporates expert beliefs and cheap proxy tasks into the HPO process, demonstrating efficiency and robustness across deep learning benchmarks, even with varying quality of expert input. Additionally, the Adaptive Teaching Learning Based (ATLB) Heuristic and evolutionary-based approaches have been explored for optimizing hyperparameters in diverse network architectures, showing performance improvements and addressing the challenge of selecting optimal hyperparameters in large problem spaces. Moreover, the practical utility of Hyperband and its variants has been empirically validated in specific applications, such as optimizing CNN hyperparameters for tomato leaf disease classification, achieving high accuracy rates. The development of HyperGE, a two-stage model driven by grammatical evolution, further illustrates the ongoing efforts to automate and refine the hyperparameter tuning process, significantly reducing the search space and the number of trials required. In conclusion, while Hyperband is a powerful tool for hyperparameter tuning in deep neural networks, its effectiveness can be further enhanced through modifications and alternative approaches that address its limitations and adapt to the specific requirements of deep learning tasks.
What is the role of digital twin in port operations?
4 answers
Digital twins play a crucial role in port operations by offering high-fidelity representations of container terminals, aiding in real-time monitoring, decision support, and resource allocation simulations. They enhance efficiency, environmental sustainability, and operational awareness in ports, similar to their impact in smart cities and supply chains. Digital twins enable the visualization and monitoring of port structures, ensuring safety and steady functioning through multi-source data fusion and innovative display technologies. By providing comprehensive data analytics capabilities, promoting intelligent decision-making, and facilitating multi-stakeholder collaboration, digital twins optimize resource allocation, improve operational processes, and contribute to energy savings in port operations.
What is the history and evolution of discrete event simulation (DES) in computer science?
5 answers
Discrete Event Simulation (DES) has evolved significantly in computer science. Initially, DES models were manually created based on expert knowledge. Over time, the utilization of DES has expanded to include the simulation of disease progression, particularly in analyzing the effectiveness of screening strategies for complex diseases. The development of distributed event list approaches has been explored to enhance DES performance, with traditional system partitioning methods showing better overall efficiency. Moreover, DES has become integral in the co-design of advanced supercomputing hardware systems, emphasizing the importance of understanding technical aspects in parallel discrete event simulation (PDES) for scientific advancements. This evolution highlights the transition of DES from manual expert-based creation to its application in diverse fields, showcasing its growing significance in computer science research and practice.
How sudden shift to online learning have an impact on quality of life of rural studnets?
5 answers
The sudden shift to online learning due to the Covid-19 pandemic has had varying impacts on the quality of life of rural students. Rural college students face challenges such as limited access to campuses and broadband, leading to personal crises exacerbated by class disparities and mental health issues. However, the Malaysian government's investment in ICT has helped bridge the digital divide in rural communities, improving their quality of life through increased awareness and use of technology. Additionally, rural elementary school students often rely on their parents' devices for online learning, impacting their social interactions, while high school students may experience lower interaction levels with parents but gain new social connections and entrepreneurial skills through social media. Rural teachers perceive distance learning as inhibiting social aspects of education, believing that true learning occurs best in-person.
What is the history of intrinsic motivation?
5 answers
The history of intrinsic motivation traces back to the fundamental role it plays in driving individuals towards curiosity, challenges, skill development, and knowledge acquisition without the need for external rewards. Research has shown that intrinsic motivation is a predictor of enhanced learning, performance, creativity, optimal development, and psychological well-being. Over the years, studies have delved into the neurobiological substrates of intrinsic motivation, highlighting its association with dopaminergic systems and large-scale neural networks supporting salience detection, attentional control, and self-referential cognition. Furthermore, the concept of intrinsic motivation has been explored in various disciplines, including nursing, education, exercise science, medicine, and psychology, emphasizing its significance in promoting sustained exercise participation and healthy behavior changes.
What are the early theories and research on intrinsic motivation?
5 answers
Early theories and research on intrinsic motivation have focused on various aspects. One study delves into information-theoretic approaches to intrinsic motivation, emphasizing empowerment and the mutual information between past actions and future states. Another research integrates flow theory, self-determination theory, and empowerment theory to identify six causal factors for intrinsic motivation, highlighting perceived competence, challenge, autonomy, impact, social relatedness, and meaningfulness. Additionally, the Self-Determination Theory explores intrinsic motivation in sports, linking it to emotional intelligence and emphasizing the importance of attention, clarity, and emotional regulation in fostering intrinsic motivation. Furthermore, a review discusses intrinsic motivation in reinforcement learning, proposing a systematic approach with three categories of methods: complementary intrinsic reward, exploration policy, and intrinsically motivated goals, all aimed at enhancing agent control and autonomy.
What are some strategies that ABM students?
5 answers
ABP (Problem-Based Learning) students employ various strategies to enhance learning. These include utilizing real-life problems to develop critical thinking and scientific competencies, applying didactic strategies like repetition and deduction to learn renewable energy sources effectively, and using ABP to strengthen reasoning abilities in higher education students. Additionally, students engage in problem-solving activities autonomously, fostering logical and mathematical reasoning skills. The ABP approach encourages students to construct knowledge through experiences related to their environment, promoting a deeper understanding of concepts and their practical applications. Overall, ABP students benefit from collaborative learning, cultural change, and increased awareness, leading to a more participatory and effective learning experience in various educational settings.
How do research publications contribute to the evaluation and impact of scientific research?
5 answers
Research publications play a crucial role in evaluating and determining the impact of scientific research. They are essential for disseminating findings, assessing academic progression, and benchmarking scientists. Various parameters like citation counts, h-index, and publication count are used to rank researchers and evaluate their impact. The quality and impact of publications are evaluated through parameters like citation polarity, purpose, and cumulative impact index. However, the "publish or perish" paradigm can lead to a focus on quantity over quality, resulting in the emergence of predatory journals and challenges in assessing scientific quality based on citation records. Overall, research publications not only contribute to the dissemination of knowledge but also play a significant role in assessing the scientific impact and progress of researchers within the scientific community.
What are some common applications of the Apriori algorithm in data mining and market basket analysis?
5 answers
The Apriori algorithm is commonly applied in data mining and market basket analysis for various purposes. It is utilized to identify frequent itemsets and generate association rules. In market basket analysis, the Apriori algorithm helps businesses understand customer purchasing behavior by uncovering relationships between products bought together, aiding in strategy development for marketing, store layout optimization, and inventory control. Additionally, the algorithm assists in determining the most frequently purchased items, enabling business owners to derive valuable association rules from customer data for enhancing sales strategies. The Apriori algorithm's ability to analyze transaction data efficiently makes it a valuable tool for businesses seeking to improve decision-making processes based on customer behavior patterns.