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 generative algorithm


Generative Algorithms for Fusion of Physics-Based Wildfire Spread Models with Satellite Data for Initializing Wildfire Forecasts

arXiv.org Artificial Intelligence

Increases in wildfire activity and the resulting impacts have prompted the development of high-resolution wildfire behavior models for forecasting fire spread. Recent progress in using satellites to detect fire locations further provides the opportunity to use measurements to improve fire spread forecasts from numerical models through data assimilation. This work develops a method for inferring the history of a wildfire from satellite measurements, providing the necessary information to initialize coupled atmosphere-wildfire models from a measured wildfire state in a physics-informed approach. The fire arrival time, which is the time the fire reaches a given spatial location, acts as a succinct representation of the history of a wildfire. In this work, a conditional Wasserstein Generative Adversarial Network (cWGAN), trained with WRF-SFIRE simulations, is used to infer the fire arrival time from satellite active fire data. The cWGAN is used to produce samples of likely fire arrival times from the conditional distribution of arrival times given satellite active fire detections. Samples produced by the cWGAN are further used to assess the uncertainty of predictions. The cWGAN is tested on four California wildfires occurring between 2020 and 2022, and predictions for fire extent are compared against high resolution airborne infrared measurements. Further, the predicted ignition times are compared with reported ignition times. An average Sorensen's coefficient of 0.81 for the fire perimeters and an average ignition time error of 32 minutes suggest that the method is highly accurate.


Faster and more diverse de novo molecular optimization with double-loop reinforcement learning using augmented SMILES

arXiv.org Artificial Intelligence

Using generative deep learning models and reinforcement learning together can effectively generate new molecules with desired properties. By employing a multi-objective scoring function, thousands of high-scoring molecules can be generated, making this approach useful for drug discovery and material science. However, the application of these methods can be hindered by computationally expensive or time-consuming scoring procedures, particularly when a large number of function calls are required as feedback in the reinforcement learning optimization. Here, we propose the use of double-loop reinforcement learning with simplified molecular line entry system (SMILES) augmentation to improve the efficiency and speed of the optimization. By adding an inner loop that augments the generated SMILES strings to non-canonical SMILES for use in additional reinforcement learning rounds, we can both reuse the scoring calculations on the molecular level, thereby speeding up the learning process, as well as offer additional protection against mode collapse. We find that employing between 5 and 10 augmentation repetitions is optimal for the scoring functions tested and is further associated with an increased diversity in the generated compounds, improved reproducibility of the sampling runs and the generation of molecules of higher similarity to known ligands.


Data-Copying in Generative Models: A Formal Framework

arXiv.org Artificial Intelligence

There has been some recent interest in detecting and addressing memorization of training data by deep neural networks. A formal framework for memorization in generative models, called "data-copying," was proposed by Meehan et. al. (2020). We build upon their work to show that their framework may fail to detect certain kinds of blatant memorization. Motivated by this and the theory of non-parametric methods, we provide an alternative definition of data-copying that applies more locally. We provide a method to detect data-copying, and provably show that it works with high probability when enough data is available. We also provide lower bounds that characterize the sample requirement for reliable detection.


AI artwork is difficult the boundaries of curation - Channel969

#artificialintelligence

In only a few years, the variety of artworks produced by self-described AI artists has dramatically elevated. A few of these works have been offered by giant public sale homes for dizzying costs and have discovered their manner into prestigious curated collections. Initially spearheaded by a couple of technologically educated artists who adopted pc programming as a part of their artistic course of, AI artwork has just lately been embraced by the lots, as picture technology expertise has grow to be each simpler and simpler to make use of with out coding abilities. The AI artwork motion rides on the coattails of technical progress in pc imaginative and prescient, a analysis space devoted to designing algorithms that may course of significant visible info. A subclass of pc imaginative and prescient algorithms, known as generative fashions, occupies heart stage on this story.


Artificial Intelligence Here's How Your Business Can Be Prepare

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Artificial Intelligence is poised to have a massive impact on how people and businesses operate. It will transform industries from healthcare to transportation and retail. But it won't just affect things from your favorite apps to your day-to-day life. It's going to have a major impact on your company too. Think about the ways AI could help your company.


How Generative AI Will Help Build the Metaverse - Acceleration Economy

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One of the most exciting aspects of the Metaverse is its potential for scalability. Neil Stephenson's Snow Crash describes a vast world full of amusement parks, houses, entertainment complexes, and worlds within themselves all connected by a virtual street tens of thousands of miles long. Unfortunately, Stephenson's novel is still considered science fiction. The question remains, who will build this enormous world? How will it be populated with content?


Algorithms that get old : the case of generative algorithms

arXiv.org Machine Learning

Generative IA networks, like the Variational Auto-Encoders (VAE), and Generative Adversarial Networks (GANs) produce new objects each time when asked to do so. However, this behavior is unlike that of human artists that change their style as times go by and seldom return to the initial point. We investigate a situation where VAEs are requested to sample from a probability measure described by some empirical set. Based on recent works on Radon-Sobolev statistical distances, we propose a numerical paradigm, to be used in conjunction with a generative algorithm, that satisfies the two following requirements: the objects created do not repeat and evolve to fill the entire target probability measure.


Algorithmic Architecture: Using A.I. to Design Buildings

#artificialintelligence

Architecture designed and built in 1921 won't look the same as a building from 1971 or from 2021. Trends change, materials evolve, and issues like sustainability gain importance, among other factors. But what if this evolution wasn't just about the types of buildings architects design, but was, in fact, key to how they design? While designers have long since used tools like Computer Aided Design (CAD) to help conceptualize projects, proponents of generative design want to go several steps further. They want to use algorithms that mimic evolutionary processes inside a computer to help design buildings from the ground up.


How to Generate Synthetic Data?

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YData offers a dataset experimentation platform with synthetic data generation. A synthetic data generation dedicated repository. This is a sentence that is getting too common, but it's still true and reflects the market's trend, Data is the new oil. Some of the biggest players in the market already have the strongest hold on that currency. When it comes to Machine Learning, definitely data is a pre-requisite, and although the entry barrier to the world of algorithms is nowadays lower than before, there are still a lot of barriers in what concerns, the data use in real-world problems -- sometimes access is restricted, others there's not enough data to get good results, the variability is not enough for model's generalization, and the list goes on.


Case study: Autodesk's generative design artificial intelligence

#artificialintelligence

While there are numerous examples of projects implementing both artificial intelligence and virtual design across the construction sector, generative machine learning is arguably one of the most interesting. Generative design is an artificial intelligence-guided tool that mimics nature's evolutionary process. A computer algorithm experiments with an initial design and then modifies it repeatedly to see whether it better fits the desired outcome parameters. After millions of attempts, it eventually produces a solution. Usually, it is better than anything that a team of experts could design, making it one of the most potent artificial intelligence applications. Autodesk was quick to see the technology's potential and decided to put it to use in designing its new office and research space in Toronto's MaRS Discovery District.