科学 新闻

One person can supervise 'swarm' of 100 unmanned autonomous vehicles, research shows
2024-02-05 20:23:59
Research involving Oregon State University has shown that a "swarm" of more than 100 autonomous ground and aerial robots can be supervised by one person without subjecting the individual to an undue workload.
Ammonia attracts the shipping industry, but researchers warn of its risks
2024-02-05 20:23:41
Switching to ammonia as a marine fuel, with the goal of decarbonization, can instead create entirely new problems. This is shown in a study from Chalmers University of Technology in Sweden, where researchers carried out life cycle analyses for batteries and for three electrofuels including ammonia. Eutrophication and acidification are some of the environmental problems that can be traced to the use of ammonia—as well as emissions of laughing gas, which is a very potent greenhouse gas.
How symmetry can come to the aid of machine learning
2024-02-05 18:57:13
Behrooz Tahmasebi—an MIT Ph.D. student in the Department of Electrical Engineering and Computer Science (EECS) and an affiliate of the Computer Science and Artificial Intelligence Laboratory (CSAIL)—was taking a mathematics course on differential equations in late 2021 when a glimmer of inspiration struck. In that class, he learned for the first time about Weyl's law, which had been formulated 110 years earlier by the German mathematician Hermann Weyl.
Non-solvating electrolytes enhance performance of organic electrode-based batteries
2024-02-05 16:24:27
In a recent study, researchers have pioneered a method to significantly enhance the performance and lifespan of organic electrode-based batteries. The findings promise to accelerate the commercialization of eco-friendly batteries and pave the way for further advancements in the field.
Space reflectors could ensure bright future for solar power farms
2024-02-05 16:24:27
Reflectors placed in orbit around the Earth that reflect sunlight toward future solar power farms at dawn and dusk could help accelerate the transition to net-zero, researchers say.
Dynamic traveling time forecasting based on spatial-temporal graph convolutional networks
2024-02-05 15:56:44
Traveling time forecasting, the core component in GPS navigation systems and taxi-hailing apps, has attracted widespread attention. Existing research mostly focuses on independent points like traffic flow prediction or route planning, which ignore globality and lack satisfactory dynamic progress to adopt sophisticated traffic conditions.
Compressed air energy storage systems could replace conventional batteries as energy providers, say scientists
2024-02-05 15:20:55
A group of scientists have found compressed air energy storage systems to have the potential of replacing conventional electrochemical batteries as a cheaper alternative, and with better storage capacity that is even sufficient to keep AC gadgets running.
Biofuel is poised to usurp crude oil refining in the Bay Area: A green solution or 'greenwashing'?
2024-02-05 13:48:33
With concerns over sustainability increasing in the energy industry, fossil-fuel companies have embraced plans to revamp, rather than decommission, vast networks of steaming, flashing and aging refinery pipelines into more eco-friendly assets.
Closing toilet-seat lids may not stop spread of germs
2024-02-03 13:59:32
English News Lessons: Free 27-Page lesson plan / 2-page mini-lesson - Toilet-seat Lids - Handouts, online activities, speed reading, dictation, mp3... current events.
A strategy to design lithium anode interlayer for all-solid-state lithium-metal batteries
2024-02-03 13:01:31
Over the past decades, engineers and chemists have been working to develop increasingly advanced battery technologies that could help to meet the rising demands of the electronics industry. This has led to the emergence of new types of batteries, including all-solid-state batteries.
Can ocean energy power carbon removal?
2024-02-02 18:50:59
The Caribbean has a problem, and it stinks.
Smarter eco-cities, AI and AI of Things, and environmental sustainability
2024-02-02 18:50:59
Smarter eco-cities, characterized by their advanced technological landscape, are at the forefront of ushering in a new era of environmental sustainability. These intelligent urban environments leverage cutting-edge Artificial Intelligence of Things (AIoT) solutions to address and mitigate environmental challenges.
AI and the human body: Hidden assumptions in motion capture can have serious impact
2024-02-02 18:50:59
When designers use inaccurate depictions of the human body, the use of artificial intelligence in some applications might not be as safe for those who don't fit that body type, according to a new study posted to the arXiv preprint server.
New material design for transistors could downsize next-gen tech
2024-02-02 14:46:39
By better taming the Jekyll-and-Hyde nature of an alternative to the semiconductor—one that transitions from electricity-resisting insulator to current-conducting metal—Nebraska's Xia Hong and colleagues may have unlocked a new path to smaller, more efficient digital devices. The team reports its findings in the journal Nature Communications.
Toward a unified taxonomy of text-based social media use
2024-02-02 13:49:03
The development of trolls appears to be the internet’s version of carcinization.
Watch: Asteroid NASA calls "potentially hazardous" about to zoom past Earth
2024-02-02 12:03:03
The asteroid, as big as a skyscraper and stadium, will pass within 1.7 million miles of Earth and you can see it on a NASA website.
How accurate are Punxsutawney Phil's Groundhog Day predictions?
2024-02-02 11:57:42
Each Groundhog Day, Punxsutawney Phil makes his prediction about a late end to winter weather or early start to spring temperatures. Here's how accurate his forecasts have been over the years.
2D single-crystalline LiCoO₂ nanosheets developed for high-performance battery-supercapacitor hybrid devices
2024-02-02 04:14:49
A team led by Prof. Wu Zhongshuai has developed novel 2D atomically thin (001)-oriented single-crystalline LiCoO2 nanosheets with longer Li+ intercalation distance and (001) planes dominated surface for high-performance battery-supercapacitor hybrid devices. This study was published in ACS Energy Letters.
Scientists develop 3D-printed pneumatic modules that control the movements of soft robots using air pressure
2024-02-02 04:14:49
In the future, soft robots will be able to perform tasks that cannot be done by conventional robots. These soft robots could be used in terrain that is difficult to access and in environments where they are exposed to chemicals or radiation that would harm electronically controlled robots made of metal. This requires such soft robots to be controllable without any electronics, which is still a challenge in development.
Researchers develop highly efficient heat-driven thermoacoustic refrigerator
2024-02-02 02:53:21
Researchers have developed an innovative heat-driven thermoacoustic refrigerator (HDTR) with a novel bypass configuration that significantly improves the efficiency of this technology.

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