The present invention relates to a method for operating an undulating diaphragm pump comprising an undulating diaphragm and actuating means of the undulating diaphragm electrically powered according to a given frequency or voltage to make the undulating diaphragm oscillate and undulate. According to the invention, the method consists in modifying the electrical supply frequency and/or voltage of the actuating means according to at least one operating parameter, determined in advance, of the undulating diaphragm pump.

The invention relates to a system and an implementation method for pumping a fluid, the system comprising: a pump comprising a flexible membrane which has two opposing surfaces, the membrane comprising a spatially rotating permanent magnetization structure, a rigid support means to which at least a portion of the lower surface of the membrane is attached, a source of a magnetic field which is capable of generating a magnetic drive field at the location of the membrane, the magnetic drive field having a substantially homogeneous orientation.

A method of transporting a material includes at least one series of interconnected tube sections that can be opened or closed. At least one downstream tube section holds the material to be transported. A liquid jet is generated which accelerates the held material upstream out of at least the first downstream tube section into at least one opening upstream tube section which then holds a material part waiting for a next liquid jet to propagate that part to the next upstream tube section.