Energy
The Azure ML Algorithm Cheat Sheet
Which machine learning algorithm should I use? The ML Algorithm cheat sheet helps you choose the best machine learning algorithm for your predictive analytics solution. Your decision is driven by both the nature of your data and the goal you want to achieve with your data. What do you want to do with your data? I must state here that we need to have a solid understanding of the iterative system of methods that guide Data Scientists on the ideal approach to solving problems using the Data Science Methodology.
Researchers protecting solar technologies from cyberattack
New research from the University of Georgia suggests a novel approach to safeguarding one possible target of a cyberattack โ the nation's solar farms. In a study published in IEEE Transactions on Smart Grid, a team in UGA's College of Engineering introduced a sensor system that monitors a key electrical component of solar farms for signs of cyber-intrusion in real time. "A growing concern is that hackers may exploit the converters that connect solar farms with the power grid," said WenZhan Song, the Georgia Power Mickey A. Brown Professor in Engineering and the study's lead investigator. "In modern grid-connected solar farms, power electronics converters can be remotely controlled, but this internet connection also expands the potential for cyberattacks." In general, power electronics use semiconductor switching devices to control and convert electrical power flow from one form to another. This technology has revolutionized modern life by streamlining manufacturing processes, increasing product efficiencies and improving the delivery of reliable power from utilities.
๐ฌ๐ง Machine learning job: Software Engineer - Machine Learning at causaLens (London, United Kingdom)
Software Engineer - Machine Learning at causaLens United Kingdom โบ London (Posted Mar 2 2022) About the company Current machine learning approaches have severe limitations when applied to real world business problems and fail to unlock the true potential of AI for the enterprise. Our enterprise platform goes beyond predictions and provides causal insights and suggested actions that directly improve business outcomes for leading businesses in asset management, banking, insurance, logistics, retail, utilities, energy, telecommunications and many others. Job description causaLens are the pioneers of Causal AI -- a giant leap in machine intelligence. We build Causal AI-powered products that are trusted by leading organizations across a wide range of industries. Our No-Code Causal AI Platform empowers all types of users to make superior decisions through an intuitive user interface.
Monte Carlo Tree Search based Hybrid Optimization of Variational Quantum Circuits
Yao, Jiahao, Li, Haoya, Bukov, Marin, Lin, Lin, Ying, Lexing
Variational quantum algorithms stand at the forefront of simulations on near-term and future fault-tolerant quantum devices. While most variational quantum algorithms involve only continuous optimization variables, the representational power of the variational ansatz can sometimes be significantly enhanced by adding certain discrete optimization variables, as is exemplified by the generalized quantum approximate optimization algorithm (QAOA). However, the hybrid discrete-continuous optimization problem in the generalized QAOA poses a challenge to the optimization. We propose a new algorithm called MCTS-QAOA, which combines a Monte Carlo tree search method with an improved natural policy gradient solver to optimize the discrete and continuous variables in the quantum circuit, respectively. We find that MCTS-QAOA has excellent noise-resilience properties and outperforms prior algorithms in challenging instances of the generalized QAOA.
Remember to correct the bias when using deep learning for regression!
Igel, Christian, Oehmcke, Stefan
When training deep learning models for least-squares regression, we cannot expect that the training error residuals of the final model, selected after a fixed training time or based on performance on a hold-out data set, sum to zero. This can introduce a systematic error that accumulates if we are interested in the total aggregated performance over many data points. We suggest to adjust the bias of the machine learning model after training as a default postprocessing step, which efficiently solves the problem. The severeness of the error accumulation and the effectiveness of the bias correction is demonstrated in exemplary experiments. Here X is some arbitrary input space and w.l.o.g.
Machine Learning Approaches for Non-Intrusive Home Absence Detection Based on Appliance Electrical Use
Lentzas, Athanasios, Vrakas, Dimitris
Home absence detection is an emerging field on smart home installations. Identifying whether or not the residents of the house are present, is important in numerous scenarios. Possible scenarios include but are not limited to: elderly people living alone, people suffering from dementia, home quarantine. The majority of published papers focus on either pressure / door sensors or cameras in order to detect outing events. Although the aforementioned approaches provide solid results, they are intrusive and require modifications for sensor placement. In our work, appliance electrical use is investigated as a means for detecting the presence or absence of residents. The energy use is the result of power disaggregation, a non intrusive / non invasive sensing method. Since a dataset providing energy data and ground truth for home absence is not available, artificial outing events were introduced on the UK-DALE dataset, a well known dataset for Non Intrusive Load Monitoring (NILM). Several machine learning algorithms were evaluated using the generated dataset. Benchmark results have shown that home absence detection using appliance power consumption is feasible.
Identifying Military Vehicles in Satellite Imagery with Tensorflow
Module #6 of Metis' Data Science and Machine Learning bootcamp is all wrapped up! For this module we focused on Deep Learning, working with non-tabular data, and building models using Google's Tensorflow library. For our project, we were tasked with creating an image classification model to solve for a real-world problem. This module took place during the Russian invasion of Ukraine. The conflict has highlighted the use of satellite imagery by journalists, human rights organizations, and open-source intelligence analysts.
Pompeii enlists Spot the robot dog to inspect the ancient city's streets
Pompeii archaeological park has enlisted a four-legged robotic dog called Spot to inspect the ancient Italian city's streets and tunnels instead of humans. Acting as a robotic guard dog, Spot will patrol Pompeii at nighttime or whenever the site is closed to tourists, providing a live feed for human officials situated off-site. Part of Spot's job is to investigate tunnels dug by illegal relic hunters, which are causing structural issues but would be dangerous or too tight for officials to access safely. Spot, which is the product of US firm Boston Dynamics, is using its cameras and sensors to provide a feed of hard-to-reach Pompeii structures. It's capable of inspecting'even the smallest of spaces', gathering and recording data useful for planning interventions to fix safety and structural issues.
Helen Greiner: Solar Powered Robotic Weeding Sense Think Act Podcast #16
In this episode, Audrow Nash speaks to Helen Greiner, CEO at Tertill, which makes a small solar powered weeding robot for vegetable gardens. The conversation begins with an overview of Helen's previous robotics experience, including at as a student at MIT, Co-founder at iRobot, Founder and CEO at CyPhyWorks, and in advising government research in robotics, AI, and machine learning. From there, Helen explains the design of the Tertill robot, how it works, and her high hopes for this simple robot: to help reduce the environmental impact of the agriculture industry by helping people to grow their own food. In the last part of the conversation, Helen speaks broadly about her experience in robotics startups, the robotics industry, and the future of robotics.