نتایج جستجو برای: gradients

تعداد نتایج: 37919  

Journal: :Nature Reviews Genetics 2012

Journal: :SIAM Journal on Imaging Sciences 2012

Journal: :Journal of Vision 2010

Journal: :Physical Review Letters 2008

Journal: :Current opinion in genetics & development 2011
Danny Ben-Zvi Ben-Zion Shilo Naama Barkai

Individuals of the same or closely related species can vary substantially in size. Still, the proportions within and between tissues are precisely kept. This adaptation of pattern with size termed scaling, is receiving a growing attention. We review experimental evidence for scaling, and describe theoretical models for mechanisms that scale morphogen gradients. We particularly note the Expansio...

Journal: :Logic Journal of the IGPL 2010
Daan Wierstra Alexander Förster Jan Peters Jürgen Schmidhuber

Reinforcement learning for partially observable Markov decision problems (POMDPs) is a challenge as it requires policies with an internal state. Traditional approaches suffer significantly from this shortcoming and usually make strong assumptions on the problem domain such as perfect system models, state-estimators and a Markovian hidden system. Recurrent neural networks (RNNs) offer a natural ...

Journal: :CoRR 2016
Mukund Sundararajan Ankur Taly Qiqi Yan

Gradients have been used to quantify feature importance in machine learning models. Unfortunately, in nonlinear deep networks, not only individual neurons but also the whole network can saturate, and as a result an important input feature can have a tiny gradient. We study various networks, and observe that this phenomena is indeed widespread, across many inputs. We propose to examine interior ...

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