1,722,803 research outputs found
進呈書像 Jin cheng shu xiang.
No full textContient : I 天主正道解略 Tian zhu zheng dao jie lüe ; II Jin cheng shu xiangNumérisation effectuée à partir d'un document de substitution.Vie de Jésus illustrée offerte à l'Empereur. Par le P. Adam Schall von Bell, Jésuite (1591-1666 ou 1669 ; noms Chinois Tang Ruo wang Dao wei) ; préface de l'auteur (1640).Exemplaire provenant de la Société de Jésus
Uncertainty quantification and propagation of crowd behaviour effects on pedestrian-induced vibrations of footbridges
Full text linkThe reliable prediction of pedestrian-induced vibration is essential for vibration serviceability assessment and further vibration mitigation design of footbridges. The response of the footbridge is governed by not only the structure dynamic model but also the crowd-induced load, which naturally involves randomness and uncertainty. It is consequently significant to appropriately characterize the uncertainties during the numerical modelling of the crowd behaviour effects on crowd-induced load. This work proposes a comprehensive approach to quantify the uncertainty from both the structure dynamic model and the crowd behaviour, and subsequently, to propagate the multiple sources of uncertainties from the input parameters to the response of the footbridge. The crowd behaviour is simulated using the social force model and translated to the crowd-induced load by combining with a single pedestrian induced walking force model. By decoupling the continuous model into several single degrees of freedom systems according to relevant modes in the vibration serviceability evaluation, the structure dynamic model of the footbridge is developed where the structural responses are calculated. In this paper, all the uncertain parameters are investigated together in a double-loop framework to perform uncertainty quantification and propagation in the form of probability-box (shortly termed as P-box). The uncertainty space of the peak structural responses is finally obtained by the Monte Carlo sampling and optimization in the outer loop and inner loop, respectively. Feasibility and performance of the overall approach are demonstrated by considering a real scale footbridge, and the failure probability of each comfort class regarding the peak acceleration response is also evaluated. Results show that, special attention should be paid on both the epistemic and aleatory uncertainties from the crowd behaviour in the vibration serviceability assessments of footbridges. The proposed uncertainty quantification framework may provide significant insights and improve the reliability for future vibration serviceability evaluations of footbridges by incorporating the crowd behaviour effects
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
sj-pdf-1-ajs-10.1177_03635465211030259 – Supplemental material for Quadriceps Tendon Autograft Versus Bone–Patellar Tendon–Bone and Hamstring Tendon Autografts for Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-analysis
No full textSupplemental material, sj-pdf-1-ajs-10.1177_03635465211030259 for Quadriceps Tendon Autograft Versus Bone–Patellar Tendon–Bone and Hamstring Tendon Autografts for Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-analysis by Wenli Dai, Xi Leng, Jian Wang, Jin Cheng, Xiaoqing Hu and Yingfang Ao in The American Journal of Sports Medicine</p
Supplementary_Materials - The Protective Effects of Preconditioning With Dioscin on Myocardial Ischemia/Reperfusion-Induced Ventricular Arrhythmias by Increasing Connexin 43 Expression in Rats
No full textSupplementary_Materials for The Protective Effects of Preconditioning With Dioscin on Myocardial Ischemia/Reperfusion-Induced Ventricular Arrhythmias by Increasing Connexin 43 Expression in Rats by Jin Cheng, Chuang Sun, Jingyu Zhang, Qing Zou, Qimeng Hao, and Yugang Xue in Journal of Cardiovascular Pharmacology and Therapeutics</p
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