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pierredv : mirror-worlds   17

Make more digital twins - Nature comment, Sep 2019
"Virtual models boost smart manufacturing by simulating decisions and optimization, from design to operations, explain Fei Tao and Qinglin Qi. "

"There is much to be done to realize the potential of digital twins. . . . Here we set out the main problems and call for closer collaboration between industry and academia to solve them."
1. Data difficulties
2. Model challenges
3. Twin teams

Four bridges
"The following steps would make research and development of digital twins more coherent."
1. Unify data and model standards.
2. Share data and models.
3. Innovate on services.
4. Establish forums.
mirror-worlds  digital-twins  NatureJournal  opinion 
17 days ago by pierredv
Colosseum: A Battleground for AI Let Loose on the RF Spectrum | 2018-09-15 | Microwave Journal
"In this article, we discuss the design and implementation of Colosseum, including the architectural choices and trades required to create an internet-based radio development and test environment of this scope and scale."
MicrowaveJournal  DARPA  Colosseum  AI  RF  simulation  mirror-worlds 
september 2018 by pierredv
What Is Digital Twin Technology - And Why Is It So Important? Forbes, Mar 2017
"Quite simply, a digital twin is a virtual model of a process, product or service. This pairing of the virtual and physical worlds allows analysis of data and monitoring of systems to head off problems before they even occur, prevent downtime, develop new opportunities and even plan for the future by using simulations."

"Think of a digital twin as a bridge between the physical and digital world."
Forbes  mirror-worlds 
november 2017 by pierredv
Google and other databases likely to make spectrum sharing easier | FierceWireless
"Sharing spectrum is likely to get a whole lot easier thanks to the databases that Google and others are creating that show where nearly every building and tree in populated areas is located. This leads to better propagation models that show where available spectrum is located and where it can be shared."

Andy Clegg: “If you want to provide point-to-multipoint services, satellites could stay in the band but if you want to open it to mobile, you most likely would have to clear the satellite interests out of the band”
FierceWireless  mirror-worlds  SAS  CBRS  database  propagation 
october 2017 by pierredv
I-Connect007 :: Article The Radio Frequency Spectrum + Machine Learning = a New Wave in Radio Technology
" there now is a need to apply ML to the invisible realm of radio frequency (RF) signals, according to program manager Paul Tilghman of DARPA’s Microsystems Technology Office. To further that cause, DARPA today announced its new Radio Frequency Machine Learning Systems (RFMLS) program."

“What I am imagining is the ability of an RF Machine Learning system to see and understand the composition of the radio frequency spectrum – the kinds of signals occupying it, differentiating those that are ‘important’ from the background, and identifying those that don’t follow the rules,” said Tilghman.

"stand up an RF forensics capability to identify unique and peculiar signals amongst the proverbial cocktail party of signals out there"

"The RFMLS program features four technical components that would integrate into future RFML systems:"
= feature learning
= attention and saliency
= autonomous RF sensor configuration
= waveform synthesis
machine-learning  ML  DARPA  enforcement  forensics  mirror-worlds  *  spectrum 
september 2017 by pierredv
aerodynamics - Will wind tunnel modelling ever be completely replaced by computer models? - Aviation Stack Exchange, Jun 2015
"With computer-based fluid simulation already being extremely realistic (and likely faster and cheaper than physical wind tunnels), are they, anywhere, completely replacing physical wind tunnels? If not, is this planned anywhere, or even possible?"

"Current situation is that wind tunnel has been replaced by numerical simulation in the area where turbulence modelling is not highly demanded by accuracy demands or physics complexity.

However, for being able to model some part of the physics the industry can only go hardware testing (wind tunnel)."
aerodynamics  mirror-worlds  StackExchange  aviation 
august 2017 by pierredv
Millions of things will soon have digital twins
"Such achievements are largely down to the factory’s “digital twin”. For there is another factory, a virtual version of the physical facility that resides within a computer system. This digital twin is identical in every respect and is used to design the control units, test them, simulate how to make them and program production machines. Once everything is humming along nicely, the digital twin hands over to the physical factory to begin making things for real."

"The powerful systems that have since emerged bring together several elements—software services in computer-aided design and engineering; simulation; process control; and product life cycle management. Some digital twins are gaining artificial intelligence and virtual-reality capabilities, too. They can also help to monitor remotely and provide after-service for products that have been sold. "

"Siemens is not alone in equipping its factories with digital twins. Its American rival, GE, is doing the same. Both companies also sell their digital-twin software, along with firms such as Dassault Systèmes, a French specialist in the area."
TheEconomist  mirror-worlds  manufacturing  automation  Siemens 
august 2017 by pierredv
World’s Most Powerful Emulator of Radio-Signal Traffic Opens for Business, April 2017
"New electronic simulation forum for wireless communication will host much of DARPA’s Spectrum Collaboration Challenge"

Paul Tilghman: “By contrast, SC2 is asking a group of radios that weren’t designed to work together to learn how to optimize spectrum capacity in real-time, and is relying on artificial intelligence to find and take advantage of ‘gaps’ and other opportunities to increase efficiency. You can’t satisfactorily learn how to solve this puzzle unless you address it at scale, and that’s why the Colosseum is such a critical part of the solution.”

"By the numbers, the Colosseum testbed is a 256-by-256-channel RF channel emulator, which means it can calculate and simulate in real-time more than 65,000 channel interactions among 256 wireless devices. Each simulated channel behaves as though it has a bandwidth (information content) of 100 MHz, which means the testbed supports 25.6 GHz of bandwidth in any instant. Moreover, each channel’s transmission and reception frequency is tunable between 10 MHz (as in broadcast FM radio) and 6 GHz (as in WiFi)."
DARPA  SC2  mirror-worlds  simulation  modeling 
august 2017 by pierredv
How a One-Man Team From California Won NASA's Space Robotics Challenge - IEEE Spectrum
Mirror worlds: "completing some tasks in the Gazebo 3D robot simulator"; cf. also DARPA SSC Coliseum

"NASA’s Space Robotics Challenge (SRC) took place last month, full of virtual Valkyries wandering around a virtual Mars base trying to fix virtual stuff. Anyone was allowed to participate, and since the virtual nature of the competition means there was no need for big expensive robots that mostly didn’t fall over, anyone actually could (and did) participate. Of the 93 teams initially signed up to compete, NASA selected 20 finalist teams based on their performance completing some tasks in the Gazebo 3D robot simulator, and each of those finalists had to program a Valkyrie humanoid to complete a repair mission on a simulated Mars base."
IEEE-Spectrum  mirror-worlds  robotics  NASA 
august 2017 by pierredv
London’s Crossrail Is a $21 Billion Test of Virtual Modeling - IEEE Spectrum Mar 2016
"The entire network was designed in a 3-D virtual environment; once the railway is up and running, a version of this 3-D model will help managers monitor, from a tablet, countless electrical components and systems across the network. “We’ve built two railways—one real, one virtual reality,” says Rhys Williams, the head of mechanical, electrical, and public health for Crossrail."
"The Crossrail model actually consists of more than 250,000 little models joined together in a database and linked to another database containing all the data and documentation about all of the railway’s assets—from 1-watt LED lightbulbs to the giant fans that extract smoke in the event of a fire—as well as detailed descriptions of all the work that’s going on. Overall, the spatial data takes up a few terabytes, with the associated documentation adding a further 5 terabytes so far."
"The model even features an augmented-reality interface. Workers are able to hold an iPad up to a station wall, for example..."
IEEE-Spectrum  London  Crossrail  design  construction  mirror-worlds  augmented-reality 
march 2016 by pierredv
Virtual worlds so good they'll change our grasp on real life - tech - 20 May 2015 - Control - New Scientist
"A London start-up called Improbable is powering this live demonstration. Rather than make single servers simulate a whole sector of the virtual world, it computes individual elements using connected "worker" programs, running across a network of servers." "The workers are like a swarm of bees or ants doing little things," says Herman Narula, Improbable's CEO. Acting together, they can achieve more than any individual server. The approach allows for low-cost simulations in which realistic interactions are ubiquitous. - "At the University of Oxford's Institute for New Economic Thinking, David Pugh and his team are planning to use Improbable to create a sophisticated model of the entire UK housing market, among other things." - "Improbable's technology has medical applications too. "You could simulate cancer growth at scale, by simulating all of the cancer cells that are growing," says Bonabeau."
NewScientist  mirror-worlds  RF-mirror-worlds  simulation  games  economics 
july 2015 by pierredv
Danish government releases geographic data by way of 1:1 Minecraft map | Ars Technica
"But what can happen when a city—or even country—opens its data doors for a total Minecraft recreation? For an answer, take a look at Denmark. Really, go look at it. You can jump into Minecraft right now and virtually walk around the nation's shores, highways, and cities because the Danish Geodata Agency has launched a full 1:1 recreation."
ArsTechnica  mirror-worlds  simulation  mapping  Denmark  minecraft  maps 
july 2014 by pierredv
Model Universe recreates evolution of the cosmos : Nature News & Comment May 2014
Work by Mark Vogelsberger et al, MIT "Can current theories of cosmology explain how the Universe evolved? One way to find out is to plug everything we think we know about the early Universe and how galaxies form into a supercomputer, and see what comes out. In a simulation presented today in Nature1, researchers did just that — and revealed a cosmos that looks rather like our own. The findings lend weight to the standard model of cosmology, but could also help physicists to probe where our models of galaxy formation fall down."
cosmology  universe  modeling  simulation  mirror-worlds  NatureJournal 
may 2014 by pierredv
Cyber-Physical Systems (CPS) (nsf14542)
"Cyber-physical systems (CPS) are engineered systems that are built from, and depend upon, the seamless integration of computational algorithms and physical components. " "Despite significant inroads into CPS technology in recent years, we do not yet have a mature science to support systems engineering of high-confidence CPS, and the consequences are profound. Traditional analysis tools are unable to cope with the full complexity of CPS or adequately predict system behavior."
NSF  security  cybersecurity  mirror-worlds  solicitation 
march 2014 by pierredv

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