新刊上线丨《Engineering》2022年第8期
全面终止人用抗菌药物在动物源性食品生产链中的使用。微生物耐药性在人与动物间的传播——我们为什么需要知道更多?
《自然》（20220818出版）一周论文导读
Abstract:Pumps are transport mechanisms in which direct currents result from a cyclic evolution of the potential. As Thouless showed， the pumping process can have topological origins， when considering the motion of quantum particles in spatially and temporally periodic potentials. However， the periodic evolution that drives these pumps has always been assumed to be imparted from outside， as has been the case in the experimental systems studied so far. Here we report on an emergent mechanism for pumping in a quantum gas coupled to an optical resonator， where we observe a particle current without applying a periodic drive. The pumping potential experienced by the atoms is formed by the self-consistent cavity field interfering with the static laser field driving the atoms. Owing to dissipation， the cavity field evolves between its two quadratures， each corresponding to a different centrosymmetric crystal configuration. This self-oscillation results in a time-periodic potential analogous to that describing the transport of electrons in topological tight-binding models， such as the paradigmatic Rice–Mele pump. In the experiment， we directly follow the evolution by measuring the phase winding of the cavity field with respect to the driving field and observing the atomic motion in situ. The observed mechanism combines the dynamics of topological and open systems， and features characteristics of continuous dissipative time crystals.
《中国日报》整版报道：广西乐业发现新天坑群
中国日报7月4日电（记者：石睿鹏 李弘扬）今日，中国日报6版整版报道《Sinkhole springs subterranean surprise广西乐业发现新天坑群》。
原来玛瑙的花纹不是画的！切开看内部结构，才知道大自然有多神奇
我敢说90%的人都跟我以前一样，以为玛瑙上那些一圈圈精致的花纹，是人工画上去或者染出来的。毕竟怎么看都太规整、太好看了，不像是天然能长出来的东西。直到最近看了这组玛瑙解剖图，我才彻底被震撼到。原来这些绝美的纹路，全是大自然一笔一笔，花了几百万年甚至几千万年，一点点“堆”出来的。
宁德时代和特斯拉差距在哪？
【能源人都在看，点击右上角加'关注'】近日，各大上市企业都在陆续发布财报。在第一季度内特斯拉生产了近10.3万辆电动汽车，交付约8.84万辆， 成为特斯拉有史以来最好的第一季度表现 。
《中国日报》整版报道：广西乐业发现新天坑群
中国日报7月4日电（记者：石睿鹏 李弘扬）今日，中国日报6版整版报道《Sinkhole springs subterranean surprise广西乐业发现新天坑群》。
“白玉兰飘香”上海电视节节目展播——纪录片
电视展播纪录片简介:1.侏罗纪探险英文片名：Secrets of the Jurassic Dinosaurs国家：英国类别：纪录片中文简介：跟随一支古生物学家团队，在美国中西部深处挖掘一个秘密地点，解开一个大规模恐龙墓地背后的谜团。
讲座预告｜如何借助新媒体推广农产品
时间:8月19日19:00-20:30。主办:中国人类学学会，中国社会科学网，法律人类学云端读书会。