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According to an admittedly informal and unscientific survey of people from online “nuclear affinity groups” conducted by Eric Wesoff, the editorial director for clean energy newsroom Canary Media, the...
Penn Engineering’s Michael Posa is an assistant professor in the Department of Mechanical Engineering and Applied Mechanics and the recipient of an April 2023 grant renewal from the Toyota Research In...
The town of Link?ping, Sweden, has a small fleet of autonomous electric buses that carry riders along a predetermined route. The bright vehicles, emblazoned with the tagline, “Ride the Future,” have o...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Prediction When Factors are Weak
因素较弱 预测 宏观经济预测
2023/5/5
In macroeconomic forecasting, principal component analysis (PCA) has been the most prevalent approach to the recovery of factors, which summarize information in a large set of macro predictors. Nevert...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：erration split-plot designs via complementary sets when the whole plot factors are important
图因子 互补集 错误分割图设计
2023/5/15
In practice, fractional factorial split-plot (FFSP) designs are widely used when the levels of some factors are very difficult to change or control. The factors of an FFSP design are divided into two ...
When curved materials flatten, simple geometry can predict the wrinkle patterns that emerge（图）
弯曲材料 皱纹图案 柔性电子产品
2023/7/7
An object that’s intrinsically flat, say a piece of paper, can be shaped into a cylinder without stretching or tearing it. The same isn’t true, however, for something intrinsically curved like a conta...
Within a given tissue or organ, cells may appear very similar or even identical. But at the molecular level, these cells can have small differences that lead to wide variations in their functions.
Unlike electrons, quarks cannot wander freely in ordinary matter. They are confined by the strong force within hadrons such as the protons and neutrons that make up atomic nuclei. However, at very hig...
When will a robot write a novel?（图）
计算机科学 人工智能 机器人 机器学习
2023/6/21
From the perspective of someone somewhat familiar with the state of the art in machine learning, my answer is that AI may be able to write trashy novels as soon as next year, but it will not write a t...
Sometimes it’s good to be a little bad.
Knowing a big deal when you see it（图）
化石 爬行动物 鳞龙
2023/6/21
It’s not uncommon for scientists to have to run experiments numerous times to see whether they have a big discovery on their hands. Every once in a while, though, a researcher makes a big find more or...
When a Brain Forgets Where Memory Is
Memory
2007/4/23
April 17, 2007，Every so often, seemingly normal people suddenly walk out of their lives and disappear, with no recollection of who they are, where they are from or what their previous life was like. I...
20/03/2007，Climate change, earthquakes and landslides are topics that are frequently in the news and rarely a month goes by without some form of major natural disaster hitting the headlines.
February 15, 2007，The fact that you’re confronting this column on a web site devoted to space science and astronomy makes you roughly as rare as technetium. Despite the fact that astronomy is one of ...