Zhendong Ceshi yu Zhenduan为了研究地铁车轮多边形对车体低频振动的影响，首先，调研了某地铁线路车轮多边形磨耗情况，在掌握地铁线路车轮多边形分布特征的基础之上，建立了考虑车轮多边形的弹性车体垂向动力学模型；其次，基于时域积分求解方法，研究了车轮多边形激励频率与车体低频振动的关系；最后，通过对比不同阶次的车轮多边形对车体低频振动的结果，讨论了服役条件下地铁车辆运行速度及车轮磨耗半径的变化对车轮多边形作用车体的影响规律。结果表明：1~3阶次的车轮多边形产生0~20 Hz的低频激励频率，当激励频率接近于车体1阶垂弯频率10.2 ...
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[Research progress and clinical practice considerations on assessment tools for gastroesophageal reflux disease in infants and young children]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiLiu RX, Li RH, Yin CX.
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Shuitu Baochi Xuebao[目的] 当前研究主要关注非喀斯特地区长时间尺度频率研究,对喀斯特不同降雨等级下的水化学采样频率研究不足,喀斯特小流域不同降雨等级水化学的最优采样频率尚不明确。[方法] 利用黔中高原典型喀斯特小流域在2022年6月至2023年7月不同降雨等级(大暴雨、大雨、中雨)间隔1 h的高频电导率(EC)数据,重采样为2~15 h的低频数据后,结合多种评价指标和突变点理论,确定喀斯特小流域不同降雨等级下水化学的最优采样频率。[结果] (1)喀斯特小流域受地质背景影响,水化学响应降雨呈现暴涨暴落特征 ...
方长敏 +6 more
doaj
[Efficacy and safety of rituximab in children with refractory nephrotic syndrome]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiBai W +8 more
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等电子三原子铀化物OUO 2+ 、NUN和NUO + 的结构和谐振频率的CCSD(T)计算研究
, 2012 涂喆研, 杨冬冬, 王繁, 李象远
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[Progresses on temporal interference electromagnetic stimulation for non-invasive deep brain function modulation]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiZhou T, Yu P, Xu Y.
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Zhongguo Dang Dai Er Ke Za ZhiLyu LH +5 more
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[Analysis of the prevalence and influencing factors of myopia among primary and secondary school students in Inner Mongolia Autonomous Region in 2022]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanLu L +11 more
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[A time-frequency transform and Riemannian manifold-based domain adaptation method for motor imagery in brain source space]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiQi Q, Li M.
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