47 results about "Electric field pulse" patented technology

The invention discloses a method for improving coal seam gas permeability through a high energy acoustoelectric composite technology to mainly solve the problems that the prior art pollutes a coal seam, cannot thoroughly improve the coal seam gas permeability, cannot improve the coal seam gas desorption and seepage and the like. According to the method for improving the coal seam gas permeability through the high energy acoustoelectric composite technology, high electric field pulses and sound waves are combined, the coal seam generates new cracks due to functions of impact wave generation, mechanical vibration and the like, original cracks are expanded, and accordingly coal seam gas transport channels are increased; meanwhile the coal seam gas deabsorption is improved through generated high-temperature effect, cavitation effect and the like and the gas filtration capacity is improved. The method for improving the coal seam gas permeability through the high energy acoustoelectric composite technology comprises a ground drainage well drilling method and a drainage drill hole method parallel to the coal seam. An implementation process comprises the following steps of (1) pulling out devices inside a drill hole; (2) injecting water to the drill hole and drill well through drift tools such as a well gauge, arranging an acoustoelectric composite action device at an appointed position and dividing the coal seam into different sections, wherein the thickness of every section is 30cm; (3) enabling the action device to repeatedly act in the sections; (4) pulling out the devices such as the acoustoelectric composite action device; (5) exhausting and mining the drill hole of the coal seam.

Provided is an electro-microneedle integrated body in which a dissolving microneedle and an electrode for electroporation are integrated into one, which enables a focused and efficient intracutaneous gene release for percutaneous gene delivery and intracellular gene delivery occurring in one in-situ treatment site The electro-microneedle integrated body according to the present invention includes an electrode for electroporation which is contacted with skin of a human body to apply an electric field pulse, including a base part and a plurality of electrode parts protruding from the base part, and a microneedle adhered to each electrode part and inserted into the skin of a human body, including a biocompatible and biodegradable viscous material and a genetic material, wherein the microneedle degrades within the skin, and the electric field pulse is applied through the electrode for electroporation in a site in which the microneedle is inserted.

When ink is ejected from any one of a plurality of pressure chambers, an electric field pulse, which corresponds to an electric field pulse to be applied to a partition wall of the pressure chamber which is to eject the ink, and has at least one square wave, which is in a direction opposite to that of the electric field pulse and has a pulse width corresponding to the electric field pulse, is applied to a partition wall adjacent to the partition wall of the pressure chamber which is to eject the ink.

A pulsatile, positive-displacement mechanical circulatory support pump which can be used for assistance or replacement of one or both ventricles. The pump includes a plurality of contractile elements radiating outward from an apex of a compliance chamber, the elements being incorporated in and / or in contact with at least a portion of an outer surface of the compliance chamber. These contractile elements include an electroactive dielectric elastomer or an ion exchange membrane metallic composite. Application of electric field pulses from an implantable electrical energy source such as a pacemaker will cause the contractile elements to compress and expand the compliance chamber.