Here, I review current state-of-the-arts in many areas of AI to estimate when it's reasonable to expect human level AI development. Predictions of prominent AI researchers vary broadly from very pessimistic predictions of Andrew Ng to much more moderate predictions of Geoffrey Hinton and optimistic predictions of Shane Legg, DeepMind cofounder. Given huge rate of progress in recent years and this broad range of predictions of AI experts, AI safety questions are also discussed.

翻译：这里,我审视了AI的许多领域的最新文章,以估计在什么情况下可以合理预期AI水平的发展。对AI的著名研究人员的预测从对Andrew Ng的非常悲观的预测到对Geoffrey Hinton的更温和的预测以及对DeepMind的共同创始人Shane Legg的乐观预测,也广泛讨论了AI的安全问题。