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17 小时
《自然》(20240919出版)一周论文导读
在此,我们表明使用新提出的紧急约束(EC)来约束模型预测,可以在全球范围内将核心干旱指标——最长年度干旱期(LAD)——预测的不确定性降低10%—26%。经EC校正后的预测结果显示,与目前预测的未来作用力情景相比,LAD的平均增幅将高出42%—44% ...
China Economic Net
4 小时
Chinese culture on display at tourism fair in Bangladesh
DHAKA, Sept. 21 (Xinhua) -- The 11th Asian Tourism Fair was held in Dhaka from Thursday to Saturday to boost the tourism industry. More than 100 tourism companies and institutions from eight countries ...
17 小时
《科学》(20240920出版)一周论文导读
引力波探测器使用数公里长的干涉仪来测量时空的微小膨胀和收缩。由于量子力学的原因,这些测量的精度是有限的。理论上,利用光的压缩态可以超越量子极限,而合适的滤光腔可以在更宽的频率范围内扩展这一优势。
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