中国-欧亚经济联盟FTA的经贸效应模拟分析--基于GTAP模型及偏效应分解

缔结FFA是丝绸之路经济带与欧亚经济联盟对接建设的预选方案。文章利用GTAP模型模拟分析了中国-欧亚经济联盟缔结自由贸易协定（FTA）对双边产生的经济贸易效应，并进一步运用偏效应分解法分析各类效应的特征及引致原因。研究发现：中国-欧亚经济联盟若缔结FTA，那么非关税壁垒削减比关税减让更能显著提高双方的经济福利和实际收入；不同区域在FTA下的行业产出水平会因为贸易创造效应而出现差异化调整；中国行业产出主要受双边关税壁垒影响，而欧亚经济联盟和中亚三国则视具体产业而呈现差异化特征；中亚三国加入欧亚经济联盟后，中国与欧亚经济联盟会出现“多赢”局面。此外，FTA框架下的中国、欧亚经济联盟及中亚三国之间的经济福利具有较强契合性，且福利提升呈现典型的帕累托改善特征，但中国产能过剩的部门产出将面临负面冲击。国家社会科学基金一般项目“中国与中亚区域贸易投资便利化推进战略研究”（项目编号：13BGJ024）;新疆高等学校人文社会科学重点研究基地兵团屯垦经济研究中心基金资助项目“丝绸之路经济带建设背景下新疆国际大通道建设研究”（项目编号：XJEDU020214C04）;石河子大学高层次人才科研启动项目“中国与中亚FTA的贸易经济效应模拟测度与政策研究--基于GTAP模型的一般均衡分析”（项目编号：RCSX201401）

The Effect of Chinese OFDI on Energy Import in Central Asia under the Background of "the Belt and Road"

通过运用分位数引力模型研究了中国对中亚区域对外直接投资的能源进口贸易效应及影响因素。结果发现,中国与中亚区域国家的对外直接投资与能源进口之间存在显著的替代效应;人均收入水平对能源进口贸易的促进作用呈"U"型特征,能源进口产品从初级产品规模扩张向高附加值产品提质转变;地理距离对能源进口的负面影响随着条件分位点的提高呈现下降趋势,贸易投资便利化将弱化距离成本的影响。This paper uses quantile gravity model method to investigate the factor of import trade effect and influence on out- ward foreign direct investment and import of energy from China to Central Asian countries. The empirical results show that there is a significant substitutional effect between outward foreign direct investment and import of energy amongst China and Central Asian countries ; the stimulative effect of per capita income level on import of energy present a ＂U＂ shape ; the trade and investment facilitation of ＂the Belt and Road＂ will weaken the influence on cost of distance.国家社会科学基金一般项目(13BGJ024)；新疆维吾尔自治区普通高等学校人文社会科学重点研究基地兵团屯垦经济研究中心基金项目(XJEDU020214C04)；石河子大学高层次人才科研启动项目(RCSX201401)

北京未来城学校教学楼钢结构设计与分析

北京未来城学校教学楼地上部分采用钢框架结构，通过设置两道结构缝将造型奇特的教学楼分成3部分。教学楼地下部分不设缝连为整体，采用钢筋混凝土框架结构。钢连廊跨度33 m，采用2层通高桁架结构。钢连廊与两侧主体结构采用弱连接，通过对比3种支座方案，选用布置金属摩擦摆隔震支座+黏滞阻尼器方案。对钢连廊与两侧主体结构整体建模进行动力弹塑性时程分析，连廊整体作为刚体随3层主楼楼面发生地震响应，隔震支座的隔震效果显著。介绍项目中钢筋混凝土梁与钢骨混凝土柱连接节点及梁配筋注意事项，为后续相关工程设计提供参考

北京未来城学校教学楼钢结构设计与分析

北京未来城学校教学楼的地上部分采用钢框架结构，并设置2道结构缝将造型奇特的教学楼分为3个部分。教学楼地下部分不设缝连为整体，采用钢筋混凝土框架结构。钢连廊跨度为33 m，采用2层通高桁架结构。钢连廊与两侧主体结构采用弱连接，通过对比3种支座方案，选用布置金属摩擦摆隔震支座+黏滞阻尼器的方案。对钢连廊与两侧主体结构整体模型进行动力弹塑性时程分析，连廊整体作为刚体随3层主楼楼面发生地震响应，隔震支座的隔震效果显著。此外，介绍了本项目中钢筋混凝土梁与钢骨混凝土柱连接节点及梁配筋的注意事项，为后续相关工程设计提供参考

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^

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors