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A deep convolutional neural network (CNN) is developed to study symmetry energy (Esym(ρ)) effects by learning the mapping between the symmetry energy and the two-dimensional (transverse momentum and rapidity) distributions of protons and neutrons in heavy-ion collisions. Supervised training is performed with labeled data-set from the ultrarelativistic quantum molecular dynamics (UrQMD) model simulation. It is found that, by using proton spectra on event-by-event basis as input, the accuracy for classifying the soft and stiff Esym(ρ) is about 60% due to large event-by-event fluctuations, while by setting event-summed proton spectra as input, the classification accuracy increases to 98%. The accuracies for 5-label (5 different Esym(ρ)) classification task are about 58% and 72% by using proton and neutron spectra, respectively. For the regression task, the mean absolute errors (MAE) which measure the average magnitude of the absolute differences between the predicted and actual L (the slope parameter of Esym(ρ)) are about 20.4 and 14.8 MeV by using proton and neutron spectra, respectively. Fingerprints of the density-dependent nuclear symmetry energy on the transverse momentum and rapidity distributions of protons and neutrons can be identified by convolutional neural network algorithm.
During the drafting process from the 1920s to 1940s, the Weimar Constitution (WRV) played a decisive role in shaping Chinese social(-ist) con- stitutions, especially the part related to the social- economic issue. Through the lens of cultural trans- lation, this paper seeks to explain how the WRV was adapted, reinterpreted, and recontextualized throughout several rounds of constitution making in China. By focusing on the roles played by the translators, legislators, and interpreters, this paper discusses how the social rights created by the WRV were translated into the fundamental policy of the 1947 Constitution of the Republic of China. More- over, regarding »policy« as the legal instrument for regulating the social-economic life, and even broader fields, it triggers the modern transforma- tion of Chinese meritocracy and reinforces the national legal tradition depicted in its modern form. To some extent, this case study on cultural translation of constitutional law discloses the mechanism, both temporarily and spatially, for the intercultural communication of the normative information.
The 100th anniversary of the Weimar Constitution’s promulgation has brought a number of new stimuli to a historiography that has for a long time focused largely on the Weimar Republic’s failure. Two prominent recent publications – Udo Di Fabio’s study and a collective volume edited by Horst Dreier und Christian Waldhoff – are reviewed in this issue by the Brazilian constitutional historian Marcelo Neves. His review and the last months’ public debate on the merits and flaws of the Weimar Constitution in Germany, which was framed by current concerns about the state of Western democracies, show to what extent constitutional history is always also a conversation about the present. ...