2023-11-20 16:51:03医药卫生
人工智能模型很强大,但它们在生物学上合理吗?

人工神经网络是一种普遍存在的机器学习模型,可以训练它来完成许多任务,之所以被称为人工神经网络,是因为它们的架构受到了生物神经元处理人脑信息的方式的启发。

阅读全文
2023-11-20 16:49:57医药卫生
几种疫苗可降低65岁及以上成年人患阿尔茨海默病的风险

既往接种破伤风和白喉疫苗,包括或不包括百日咳(Tdap/Td);带状疱疹(HZ),更为人所知的带状疱疹;根据休斯顿UTHealth的最新研究,肺炎球菌和肺炎球菌都与患阿尔茨海默病的风险降低有关。

阅读全文
2023-11-20 16:48:25医药卫生
研究揭示了导致神经退行性疾病的基因突变的潜在新来源

科学家们发现了导致亨廷顿舞蹈症等罕见疾病的基因突变的另一个潜在原因。

阅读全文
2023-11-20 16:48:15时空
科学家发现脉冲星有史以来能量最高的伽马射线

Scientists using the H.E.S.S. observatory in Namibia have detected the highest energy gamma rays ever from a dead star called a pulsar. The energy of these gamma rays clocked in at 20 tera-electronvolts, or about ten trillion times the energy of visible l

阅读全文
2023-11-20 16:48:14时空
寻找第九颗行星的阴谋愈演愈烈

A pair of theoretical physicists are reporting that the same observations inspiring the hunt for a ninth planet might instead be evidence within the solar system of a modified law of gravity originally developed to understand the rotation of galaxies.

阅读全文
2023-11-20 16:48:13时空
脉冲星可能使暗物质发光

The central question in the ongoing hunt for dark matter is: what is it made of? One possible answer is that dark matter consists of particles known as axions. A team of astrophysicists, led by researchers from the universities of Amsterdam and Princeton,

阅读全文
2023-11-20 16:48:12时空
天文学家发现行星形成的第一步

Astronomers have gotten very good at spotting the signs of planet formation around stars. But for a complete understanding of planet formation, we also need to study examples where planet formation has not yet started. Looking for something and not findin

阅读全文
2023-11-20 16:48:10时空
银河系中心具有动荡形成历史的年轻恒星喷泉

An unexpectedly high number of young stars has been identified in the direct vicinity of a supermassive black hole and water ice has been detected at the center of our galaxy.

阅读全文
2023-11-20 16:48:10时空
探测到水星局部合唱波的电子加速源和X射线极光

Observations during two flybys by the Mio spacecraft as part of the BepiColombo International Mercury Exploration Project have revealed that chorus waves occur quite locally in the dawn sector of Mercury. Mercury's magnetic field is about 1% of that of E

阅读全文
2023-11-20 16:48:09时空
寻找银河系翘曲的解释

The Milky Way is often depicted as a flat, spinning disk of dust, gas, and stars. But if you could zoom out and take an edge-on photo, it actually has a distinctive warp -- as if you tried to twist and bend a vinyl LP.

阅读全文
2023-11-20 16:48:07时空
研究人员表示,很容易清除地外样本中的磁性航天器污染

For decades, scientists have pondered the mystery of the moon's ancient magnetism. Based on analyses of lunar samples, its now-deceased magnetic field may have been active for more than 1.5 billion years -- give or take a billion years. Scientists believ

阅读全文
2023-11-20 16:48:07时空
“星震”可以解释神秘信号

Fast radio bursts, or FRBs, are an astronomical mystery, with their exact cause and origins still unconfirmed. These intense bursts of radio energy are invisible to the human eye, but show up brightly on radio telescopes. Previous studies have noted broad

阅读全文
 11855   首页 上一页 877 878 879 880 881 882 883 884 885 886 下一页 尾页