《科学》(20221007出版)一周论文导读
Abstract:Investment in severe acute respiratory syndrome coronavirus 2 sequencing in Africa over the past year has led to a major increase in the number of sequences that have been generated and used to track the pandemic on the continent, a number that now exceeds 100,000 genomes. Our results show an increase in the number of African countries that are able to sequence domestically and highlight that local sequencing enables faster turnaround times and more-regular routine surveillance. Despite limitations of low testing proportions, findings from this genomic surveillance study underscore the heterogeneous nature of the pandemic and illuminate the distinct dispersal dynamics of variants of concern—particularly Alpha, Beta, Delta, and Omicron—on the continent. Sustained investment for diagnostics and genomic surveillance in Africa is needed as the virus continues to evolve while the continent faces many emerging and reemerging infectious disease threats. These investments are crucial for pandemic preparedness and response and will serve the health of the continent well into the 21st century.
光伏支架的宿命:腐蚀 | 一口气读懂“大气腐蚀”
北极星太阳能光伏网讯:上一篇讲了腐蚀的机理,其中“大气腐蚀”是最显而易见的一种腐蚀现象。上篇:光伏支架的宿命: 腐蚀 | 腐蚀的基本理论。Page 15, Annex E, ISO9223。
剑桥揭开大模型翻车黑箱,别再怪它不懂推理,是行动出错了
【导读】为什么大模型,在执行长时任务时容易翻车?这让一些专家,开始质疑大模型的推理能力,认为它们是否只是提供了「思考的幻觉」。近日,剑桥大学等机构的一项研究证明:问题不是出现在推理上,而是出在大模型的执行能力上。大模型也有「EMO」时刻。
《自然》(20210603出版)一周论文导读
The extension of the cosmic-ray spectrum beyond 1 petaelectronvolt indicates the existence of the so-called PeVatrons—cosmic-ray factories that accelerate particles to PeV energies.We need to locate and identify such objects to find the origin of Galactic cosmic rays. Here we report the detection of more than 530 photons at energies above 100 teraelectronvolts and up to 1.4 PeV from 12 ultrahigh-energy γ-ray sources with a statistical significance greater than seven standard deviations. Despite having several potential counterparts in their proximity, including pulsar wind nebulae, supernova remnants and star-forming regions, the PeVatrons responsible for the ultrahigh-energy γ-rays have not yet been firmly localized and identified , leaving open the origin of these extreme accelerators.
My China Eye丨斯里兰卡前驻华大使:斯里兰卡有望从“一带一路”中受益,摆脱当前危机
我认为斯里兰卡有望进一步从“一带一路”投资中受益。事实上,我们也已经在“一带一路”框架下吸引到了更多投资。或许“一带一路”的相关投资能够帮助斯里兰卡摆脱当前的财政危机。
贸易简史|失落的航路:一艘沉船与青铜时代的全球化(二)
考古学家们认为,“乌鲁布伦沉船”完美地体现了青铜时代晚期的地中海东部沿岸贸易情况。公元前14世纪末,是这一地区贸易最为活跃和丰富多彩的时期,近东和非洲的原材料和制成品通过各种途径运往爱琴海及希腊本土。
PRL导读-2019年122卷09期
序言本着服务于中国物理学者和物理专业研究生的宗旨,我们根据PRL摘要和引言对本期部分文章进行中文导读。
在你们考研的时候,有没有挖到一个这样的宝藏男孩儿
所以,准备的单词、短语、专有名词、词根还有背景知识拓展比往期要多10%。本文依旧收集了重点词的考频信息,并利用词根词缀串联起来,科学地提高记词效率。
每日英语一读|咖啡到底几点喝,提神效果最好?
When Is the Best Time to Drink Coffee? 早上刚睁眼来一杯,午后犯困再续一杯,这是很多人的咖啡习惯。但咖啡并不是喝下去就立刻起效,也不会在几个小时后突然完全失效。
斯里兰卡有望进一步从“一带一路”投资中受益
我认为斯里兰卡有望进一步从“一带一路”投资中受益。事实上,我们也已经在“一带一路”框架下吸引到了更多投资。或许“一带一路”的相关投资能够帮助斯里兰卡摆脱当前的财政危机。