基于指标独立性的景气指数构建赋权方法

经济景气指数常使用独立性权数来合成。以往的研究中,只使用一种相关系数作为指标间信息重复程度的代表,并且未能突显出指标的预测能力。文章提出了复合独立信息赋权法。其原理是使用复相关系数,时差相关系数,自相关系数,用时差进行修正,再进行归一化得到权重。以广东省经济数据为例,使用简单相关系数法、复相关系数法等常见的独立信息赋权方法进行了比较。认为复合独立信息赋权法具有能够突显具有优良预测能力指标的能力。中国南方电网有限责任公司电网技术研究中心资助项

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^