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Dense reinforcement learning for safety validation of autonomous vehicles
An intelligent environment has been developed for testing the safety performance of autonomous vehicles and its effectiveness has been demonstrated for highway and urban test tracks in an augmented-reality environment.
- Shuo Feng
- , Haowei Sun
- & Henry X. Liu
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A hybrid optical–wireless network for decimetre-level terrestrial positioning
A terrestrial networked positioning system based on a hybrid optical–wireless telecommunication infrastructure and that is independent of global navigation satellite systems is demonstrated for urban environments with decimetre-level accuracy.
- Jeroen C. J. Koelemeij
- , Han Dun
- & Christian C. J. M. Tiberius
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Article
| Open AccessQuantum sensing for gravity cartography
A study reports a quantum gravity gradient sensor with a design that eliminates the need for long measurement times, and demonstrates the detection of an underground tunnel in an urban environment.
- Ben Stray
- , Andrew Lamb
- & Michael Holynski
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Supply chain diversity buffers cities against food shocks
An intensity−duration−frequency model linking food shock risk to supply chain diversity in the USA finds that boosting a city’s food supply chain diversity increases the resistance of a city to food shocks of mild to moderate severity.
- Michael Gomez
- , Alfonso Mejia
- & Richard R. Rushforth
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Multistable inflatable origami structures at the metre scale
Origami-inspired multistable structures that can be inflated from flat to three dimensions have been designed; a library of foldable shapes is created and then combined to build metre-scale functional structures.
- David Melancon
- , Benjamin Gorissen
- & Katia Bertoldi
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Letter |
Universal resilience patterns in complex networks
An analytical framework is proposed for a complex network to accurately predict its dynamic resilience and unveil the network characteristics that can enhance or diminish resilience.
- Jianxi Gao
- , Baruch Barzel
- & Albert-László Barabási
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How to build a low-energy future
Advanced construction technologies promise huge energy savings, says Philip Farese. Investment is needed to bring them to market and to encourage their use.
- Philip Farese