Forwarded from انجمن علمی فیزیک دانشگاه اصفهان
سخنرانی دکتر اجتهادی
عضو هیئت علمی دانشگاه صنعتی شریف و رئیس انجمن فیزیک ایران
"از ذره تا ماده ی فعال"
سه شنبه 7آذر
ساعت14الی16
همایشگاه ابوریحان بیرونی
@uisaph
عضو هیئت علمی دانشگاه صنعتی شریف و رئیس انجمن فیزیک ایران
"از ذره تا ماده ی فعال"
سه شنبه 7آذر
ساعت14الی16
همایشگاه ابوریحان بیرونی
@uisaph
💠 Dan Dennett on meaning, information, patterns, and deep learning.
https://www.edge.org/conversation/daniel_c_dennett-a-difference-that-makes-a-difference
https://www.edge.org/conversation/daniel_c_dennett-a-difference-that-makes-a-difference
#سمینارهای_هفتگی گروه سیستمهای پیچیده و علم شبکه دانشگاه شهید بهشتی
🔹شنبه، ۴ آذرماه، ساعت ۴:۰۰ - کلاس۱ دانشکده فیزیک دانشگاه شهید بهشتی.
@carimi
🔹شنبه، ۴ آذرماه، ساعت ۴:۰۰ - کلاس۱ دانشکده فیزیک دانشگاه شهید بهشتی.
@carimi
🔖 Exponential or power law? How to select a stable distribution of probability in a physical system
Andrea Di Vita
🔗 https://arxiv.org/pdf/1711.07811
📌 ABSTRACT
A mapping of nonextensive statistical mechanics into Gibbs' statistical mechanics exists, which leads to a generalization of Einstein's formula for fluctuations. A unified treatment of stability of relaxed states in nonextensive statistical mechanics and Gibbs' statistical mechanics follows. The former and the latter are endowed with probability distribution of microstates ruled by power laws and Boltzmann exponentials respectively. We apply our treatment to the relaxed states described by a 1D nonlinear FokkerPlanck equation. If the latter is associated to the stochastic differential equation obtained in the continuous limit from a 1D, autonomous, discrete map affected by noise, then we may ascertain whether if a relaxed state follow a power law distribution (and with which exponent) by looking at both map dynamics and noise level, with no assumptions concerning the additive or multiplicative nature of the noise and with no numerical computation of the orbits. Results agree with the simulations of Sanchez et al. EPJ 143.1 (2007) 141-143 concerning relaxation to a Pareto-like distribution.
Andrea Di Vita
🔗 https://arxiv.org/pdf/1711.07811
📌 ABSTRACT
A mapping of nonextensive statistical mechanics into Gibbs' statistical mechanics exists, which leads to a generalization of Einstein's formula for fluctuations. A unified treatment of stability of relaxed states in nonextensive statistical mechanics and Gibbs' statistical mechanics follows. The former and the latter are endowed with probability distribution of microstates ruled by power laws and Boltzmann exponentials respectively. We apply our treatment to the relaxed states described by a 1D nonlinear FokkerPlanck equation. If the latter is associated to the stochastic differential equation obtained in the continuous limit from a 1D, autonomous, discrete map affected by noise, then we may ascertain whether if a relaxed state follow a power law distribution (and with which exponent) by looking at both map dynamics and noise level, with no assumptions concerning the additive or multiplicative nature of the noise and with no numerical computation of the orbits. Results agree with the simulations of Sanchez et al. EPJ 143.1 (2007) 141-143 concerning relaxation to a Pareto-like distribution.
🎞 The fifth Oxford Reproducibility Lecture:
EJ Wagenmakers on Bayesian statistics without tears:
http://neuroanatody.com/2017/11/oxford-reproducibility-lectures-ej-wagenmakers/
EJ Wagenmakers on Bayesian statistics without tears:
http://neuroanatody.com/2017/11/oxford-reproducibility-lectures-ej-wagenmakers/
Forwarded from انجمن علمی فیزیک بهشتی (SBU)
#سمینار_عمومی این هفته
به تعادل رسیدن از دیدگاه هولوگرافی
-۳شنبه ۷ آذر: ساعت ۱۶
-تالار ابن هیثم، دانشکده فیزیک
کانال انجمن علمی دانشجویی فیزیک
@sbu_physics
به تعادل رسیدن از دیدگاه هولوگرافی
-۳شنبه ۷ آذر: ساعت ۱۶
-تالار ابن هیثم، دانشکده فیزیک
کانال انجمن علمی دانشجویی فیزیک
@sbu_physics