Julien281

Thank you for your answer @oxinabox . I posted this question to [stack overflow](https://stackoverflow.com/questions/50585190/julia-tensorflow-normalize-a-batch-of-tensors) Flux.jl does not work with placeholders (I opened an [issue](https://github.com/FluxML/Flux.jl/issues/273) about this), so I can't use...