Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for training an environment representation neural network of a reinforcement learning system controls an agent to perform a given task. In one aspect, the method includes: receiving a current observation input and a future observation input; generating, from the future observation input, a future latent representation of the future state of the environment; processing, using the environment representation neural network, to generate a current internal representation of the current state of the environment; generating, from the current internal representation, a predicted future latent representation; evaluating an objective function measuring a difference between the future latent representation and the predicted future latent representation; and determining, based on a determined gradient of the objective function, an update to the current values of the environment representation parameters.

Abstract: A computer-implemented method of training a neural network. The method comprises processing a first transformed view of a training data item, e.g. an image, with a target neural network to generate a target output, processing a second transformed view of the training data item, e.g. image, with an online neural network to generate a prediction of the target output, updating parameters of the online neural network to minimize an error between the prediction of the target output and the target output, and updating parameters of the target neural network based on the parameters of the online neural network. The method can effectively train an encoder neural network without using labelled training data items, and without using a contrastive loss, i.e. without needing “negative examples” which comprise transformed views of different data items.

Abstract: The invention relates to an antiseptic tampon and a method of preparing it, which method consists of introducing metered quantities of a liquid mixture of antiseptic product and hydrophobic excipient into individual sheaths (14) for packaging tampons, then introducing standard tampons (22) into said sheaths (14) so that their lower ends are immersed in the mixture of antiseptic product and excipient, and then closing and sealing said sheaths (14).

Abstract: The invention relates to an antiseptic tampon and a method of preparing it, which method consists of introducing metered quantities of a liquid mixture of antiseptic product and hydrophobic excipient into individual sheaths (14) for packaging tampons, then introducing standard tampons (22) into said sheaths (14) so that their lower ends are immersed in the mixture of antiseptic product and excipient, and then closing and sealing said sheaths (14).

Abstract: The invention relates to an antiseptic tampon and a method of preparing it, which method consists of introducing metered quantities of a liquid mixture of antiseptic product and hydrophobic excipient into individual sheaths (14) for packaging tampons, then introducing standard tampons (22) into said sheaths (14) so that their lower ends are immersed in the mixture of antiseptic product and excipient, and then closing and sealing said sheaths (14).

Abstract: In a method of deoxidizing and/or carburizing a metal, particularly steel, bath using an immersed nozzle consisting of two concentric tubes, the central tube of the nozzle is fed with an oxidizing gas during the or each oxidation phase, then with a scavenging gas, then with a neutral gas carrying carbon powder or powder containing carbon during the or each deoxidation or carburization phase and finally with a scavenging gas, the outer tube of the nozzle being fed with a protective fluid or different protective fluids during both the oxidation and deoxidation or carburization phases.

Abstract: In a method of treatment of liquid metal by blowing in at least one fluid in the form of jets emitted by blast pipes, the jets being arranged in at least two groups of which one group is supplied with fluid at high pressure to provide high impetus jets for a part of the treatment and the other group is supplied with fluid at lower pressure to provide lower impetus jets, the fluid supplies having variable pressures such that the jets can all be supplied with lower pressure fluid for another part of the treatment.