1958 results about "Electrode pair" patented technology

Described herein are shock wave catheters having discontinuous emitter bands. The catheters may be used for treating occlusions in a body lumen. In some examples, the catheters include an elongated tube, a shock wave electrode assembly at least partially embedded within the elongated tube, and an enclosure surrounding the shock wave electrode assembly. In some examples, the electrode assembly includes an emitter band at least partially encircling the elongated tube, the emitter band forming a first electrode of an electrode pair, and one wire having a distal end forming a second electrode of the electrode pair. The shock wave electrode assembly is configured to emit a shock wave when a voltage pulse is applied across the electrode pair. In some examples, the at least one emitter band is compressible to reduce a diameter of the emitter band.

In one embodiment, a medical system includes a catheter configured to be inserted into a chamber of a heart of a living subject, and including multiple electrodes configured to capture electrical activity from electrical activation signals propagating in tissue of the chamber, a display, and processing circuitry configured to automatically select bipolar signals to be captured into an electro-anatomical map from respective electrode pairs of the multiple electrodes responsively to an alignment of the respective electrode pairs with a direction of propagation of the electrical activation signals, and render the electro-anatomical map to the display.

A high-altitude electrode discharge voltage prediction method and system, a device and a medium, relating to the technical field of electrode discharge. The method comprises: acquiring a measured dataset of a high-altitude true electrode, and performing normalization processing and data partitioning on the measured dataset in a preset selection ratio to generate an initial training set and a test set; on the basis of the degree of influence between a feature variable and a target variable in the initial training set, constructing a target training set; carrying out model construction on the basis of a support vector regression method and an ant lion optimization algorithm in combination with the target training set, to generate an intermediate intelligent model; using the test set to test the intermediate intelligent model, and determining a target intelligent model; and inputting the measured dataset into the target intelligent model for discharge voltage calculation, to generate discharge voltage prediction data corresponding to the high-altitude true electrode. By means of the ant lion optimization intelligent algorithm and the target intelligent model, the accuracy of prediction results can be improved.

The invention discloses a large-scale pig breeding wastewater purification treatment system, and relates to the technical field of wastewater treatment.The large-scale pig breeding wastewater purification treatment system is characterized in that the ion concentration of anaerobic liquid is monitored through a multi-ion sensing array, and a multi-channel feeding system is controlled to synthesize customized struvite compound fertilizer; the AI prediction control unit predicts the optimal medicament dosage and realizes millisecond-level closed-loop regulation; the multi-dimensional synergistic biochemical treatment module comprises an A / O biochemical treatment unit and an electric field enhanced anaerobic ammonia oxidation reactor, the electric field enhanced anaerobic ammonia oxidation reactor applies a direct-current electric field through an electrode pair, and engineering conductive biochar is used as a carrier to accelerate microbial metabolism; the sludge low-temperature pyrolysis self-consistent circulation module is used for pyrolyzing and converting residual sludge into biochar, biofuel and wood vinegar, and the biochar activation treatment unit is used for preparing engineering conductive biochar and forming a substance closed loop through a self-consistent circulation conveying system; and the digital twinning intelligent management and control platform realizes intelligent management and control of the system.

The invention provides a micro-fluidic device and a preparation method thereof. The micro-fluidic device comprises a micro-fluidic substrate and a control substrate, the microfluidic substrate comprises a first substrate and a plurality of electrode pairs; the control substrate comprises a second substrate, a control circuit layer and a plurality of contact pairs; the first surface of the first substrate is provided with a plurality of opening areas, each opening area is provided with two accommodating grooves which are arranged at intervals, and the two accommodating grooves are communicated through a microfluidic channel on a common side wall; the plurality of electrode pairs are arranged on the first substrate and are arranged corresponding to the opening area. The control circuit layer is arranged on the second substrate; the plurality of contact pairs are arranged on the second substrate and are electrically connected with the control circuit layer; the control substrate is attached to the microfluidic substrate during use, the plurality of contact pairs are electrically connected with the plurality of electrode pairs, and the control circuit layer is used for applying voltage to each electrode pair. According to the microfluidic device, a plurality of samples are processed in parallel, the detection efficiency is improved, and the replacement cost can be reduced.

A display device includes a display area in which a plurality of first pixels and second pixels including a plurality of pixel electrodes spaced apart from each other are disposed, a first light blocking layer disposed in the display area and including a plurality of holes disposed to overlap the pixel electrodes, a plurality of color filters disposed on the first light blocking layer to correspond to the holes, and a second light blocking layer disposed on the color filter and disposed to correspond to the pixel electrodes of the second pixels, the first light blocking layer including a plurality of divided portions disposed around the holes of the second pixel and penetrating the first light blocking layer, and the color filters disposed in the second pixel and disposed to cover the hole of the first light blocking layer, where the divided portions are disposed to correspond to the holes.

A catheter and segmented balloon system for an intravascular lithotripsy system having improved accommodation for curved configurations to prevent damage to the balloon during electrical arcing of electrode pairs. The catheter can include an elongate member with alternating flexibility regions wherein stiffer regions are configured to support at least one spaced-apart electrode pair, and wherein more flexible regions are disposed on either side of each stiffer region. This configuration allows the elongate member to curve more easily in the region of the electrodes, which are located within a balloon, or segmented balloon system. The balloon can include balloon segments with interposed sections between each of the segmented balloons wherein the outer diameter of an inflated balloon segment is larger than the outer diameter of the interposed section.

The invention relates to a photovoltaic cell preparation method, a photovoltaic cell, a laminated cell and a photovoltaic cell module. Providing an initial battery piece; depositing and forming a protective layer on the surface; carrying out laser treatment twice; printing and sintering to form an electrode; and carrying out at least two times of laser-assisted sintering on the electrode. According to the photovoltaic cell preparation method, the protection layer at the first area is removed, the doping concentration at the first area is improved, and at least two times of laser-assisted sintering are combined, so that on one hand, the metal contact area is optimized, the usage amount of silver paste is reduced, the material cost is reduced, and meanwhile, paste contact sintering is enhanced; damage caused by laser grooving doping is removed; and on the other hand, the doping concentration is optimized, the contact resistance is remarkably reduced, the open-circuit voltage and the filling factor are favorably improved, the shading loss is reduced, and the current collection efficiency is ensured, so that the photoelectric conversion efficiency and the reliability of the cell are remarkably improved, the production process is simplified, and the production cost is reduced.

The invention provides a solar cell and a photovoltaic module, and relates to the technical field of photovoltaics. The battery includes: a silicon substrate including a surface having an N region and a P region; the N-type doped layer is positioned on the N region of the silicon substrate; the P-type doped layer is located on the P region of the silicon substrate; the first electrode is in contact with the P-type doped layer; the second electrode is in contact with the N-type doped layer; the first electrode and the second electrode both contain metal elements; the content of metal elements in a region corresponding to the first electrode in the P-type doped layer is greater than the content of metal elements in a region corresponding to the second electrode in the N-type doped layer. According to the invention, the contact resistance corresponding to the first electrode can be reduced, the contact difference between the P region and the N region can be reduced, good contact between the P region and the N region is realized at the same time, and the efficiency of the solar cell is improved.

The invention discloses a shock wave forming device with a valve blood perfusion function, which relates to the technical field of medical instruments and comprises a catheter sheath, a shock wave forming balloon group, a shock wave generating component, a handle and a magnetic flexible net opening and closing structure. A guide wire is slidably arranged in the catheter sheath; the shock wave forming balloon set comprises a plurality of shock wave balloons, one ends of the shock wave balloons are connected with the end of the guide wire through flexible net-shaped structures, and the other ends of the shock wave balloons are connected with the end of the catheter sheath through flexible rod-shaped structures. The shock wave generating assembly comprises an axial shock wave generating electrode pair and a circumferential shock wave generating electrode pair; and the magnetic type flexible net opening and closing structure is arranged between the guide wire end part and the flexible net-shaped structure. The blood vessel can be mechanically supported or loosened; through the axial shock wave generation electrode pair and the circumferential shock wave generation electrode pair, the blocking plaque can be opened in the forward direction, and shock waves can be emitted in the circumferential direction to crack or crush calcium deposits; in addition, broken calcified plaques or aortic plaques, thrombus and the like can be captured.

An electromagnetic wave detector includes a first ferroelectric layer, a two-dimensional material layer, a first electrode pair, and a second electrode pair. The first electrode pair includes a first electrode and a second electrode. The second electrode pair includes a third electrode and a fourth electrode. The first electrode pair and the second electrode pair are electrically connected to the two-dimensional material layer. The third electrode and the fourth electrode are disposed to face each other in a first direction perpendicular to a polarization direction of spontaneous polarization of the first ferroelectric layer. The first electrode and the second electrode are disposed to face each other in a second direction different from the first direction.

The invention belongs to the field of heterojunction cells, and particularly discloses a heterojunction cell and a preparation method thereof, which are characterized in that heavily doped amorphous silicon is deposited in a corresponding area of a grid line electrode, so that high parasitic absorption, surface dangling bond and interface state density are reduced, and the open voltage and the efficiency of the heterojunction cell are improved. The main technical scheme of the invention is as follows: according to the heterojunction cell, grooves are formed in corresponding areas of grid line electrodes on the front surface and the back surface of an N-type silicon substrate; arranging an intrinsic amorphous silicon layer; the light doping P-type amorphous silicon layer is arranged on the front intrinsic amorphous silicon layer, the light doping N-type amorphous silicon layer is arranged on the back intrinsic amorphous silicon layer, the heavy doping P-type amorphous silicon layer is arranged in a groove corresponding area on the light doping P-type amorphous silicon layer, the heavy doping N-type amorphous silicon layer is arranged in a groove corresponding area on the light doping N-type amorphous silicon layer, and the light doping N-type amorphous silicon layer is arranged in a groove corresponding area on the light doping N-type amorphous silicon layer. The P-type doped amorphous silicon layer and the N-type doped amorphous silicon layer are respectively provided with a transparent conductive oxide layer, and the grid line electrodes are arranged on the transparent conductive oxide layers. The invention is mainly used for power generation.

The invention discloses a head space positioning method, device and system based on electrical impedance tomography, and the method comprises the steps: constructing a corresponding three-dimensional model according to the basic parameters of a flexible electrode cap, and carrying out the finite element meshing, and obtaining a three-dimensional mesh model; performing electric field distribution calculation on sampling points of the three-dimensional grid model according to a preset calculation rule to obtain corresponding touch electrode response information; generating a sensitive field matrix corresponding to the sampling points and the electrode pairs in the flexible electrode cap according to the touch electrode response information; performing projection matching according to the initial voltage data of the electrode pair and the sensitive field matrix to obtain projection matching information; and performing model training according to the projection matching information and the tensile deformation data of the flexible electrode cap to obtain a voltage feature-space coordinate mapping relation, and analyzing the induced voltage data of the electrode pair to obtain corresponding target coordinate information. According to the method, the voltage change of the flexible electrode cap is obtained and analyzed to obtain the coordinate information, and the positioning accuracy and stability are improved.

The invention relates to the technical field of display, in particular to an array substrate and an electrowetting display panel, the array substrate comprises a first substrate, a driving layer, a pixel definition layer and an insulating layer with hydrophobicity, and the driving layer comprises a driving electrode; the pixel definition layer is provided with pixel openings corresponding to the driving electrodes; the insulating layer comprises a plurality of microstructures, each microstructure comprises a first sub-part and a second sub-part located on the side, close to the first substrate, of the first sub-part, and the first sub-parts support the polar fluid in the pixel openings. The adjacent second sub-parts are connected, the gaps are formed between the adjacent first sub-parts, the top end gaps between the adjacent first sub-parts are the target gaps, and the target gaps are configured to be spaced from the second sub-parts when the polar fluid is supported on the first sub-parts, so that the problem that the polar fluid is in contact with the second sub-parts can be solved; therefore, the driving voltage can be reduced, and the driving speed of the polar fluid can be improved.

The invention relates to the technical field of single molecule devices, in particular to a probability bit device based on single tetraligand molecule dipole moment and a preparation method, a single tetraligand dipole molecule is assembled between a graphene point electrode pair, the single tetraligand dipole molecule has good randomness or uncertainty characteristics, and the probability bit device can be used for preparing a probabilistic bit device based on the single tetraligand molecule dipole moment. The states of the molecules can be read through conductance, and probability bits of a single molecule scale are realized; according to the invention, the linear mapping relation between the bistable time ratio and the bias voltage parameter is established by using the voltage dependence of molecular dipole inversion, the random generation mode of the traditional probability bit is broken through, the molecular configuration dynamic state is used as the core regulation dimension, and the characteristics of high-sensitivity field response and long-time coherence are integrated. And an efficient and extensible hardware carrier is provided for quantum-classical hybrid calculation. The preparation method provided by the invention is simple in process, mild in reaction condition and beneficial to large-scale production.

The invention provides a microfluidic device. The microfluidic device comprises a first substrate, a plurality of electrode pairs and a control circuit layer, wherein the first substrate comprises a first surface; the first surface is provided with a plurality of opening areas arranged at intervals, each opening area is provided with two containing grooves arranged at intervals in the first direction, the common side wall of the two containing grooves is provided with a micro-flow channel, and the two containing grooves are communicated through the micro-flow channel. The plurality of electrode pairs are arranged on the first substrate; each electrode pair is arranged corresponding to one opening area; the electrode pair comprises two driving electrodes, and the two driving electrodes are arranged on the two opposite sides of the microfluidic channel at intervals in the first direction. The control circuit layer is arranged on the first substrate and is electrically connected with the plurality of electrode pairs; wherein the control circuit layer is used for applying voltage to each electrode pair. According to the microfluidic device, a plurality of DNA molecules or biological samples are processed in parallel, and the detection efficiency is remarkably improved.

The invention discloses an irreversible electroporation damage assessment system and method based on myocardial dielectric properties, solves the problem of how to assess damage in a pulsed electric field ablation process, and belongs to the technical field of medical equipment. The system comprises an acquisition module and a workstation, wherein the acquisition module acquires an intracardiac ECG signal, a global electric field voltage signal of a target cardiac cavity, and impedance and temperature between ablation electrode pairs in real time; the work station processes the collected signals to obtain electrocardio characteristics, ablation parameters, temperature between the ablation electrode pairs, impedance drop, contact force and contact state between the ablation electrode pairs and myocardial tissue and ablation electrode position stability, the obtained signals are input into the evaluation model, and the evaluation model outputs IRE injury evaluation classification results. The evaluation model is realized based on a neural network. And real-time measurement and evaluation are carried out on PF ablation injury so as to assist a user to complete comprehensive, objective and accurate evaluation of the ablation effect.

The invention discloses an electrode connecting and changing device suitable for an electric arc furnace, relates to the technical field of clamping tools, and provides the electrode connecting and changing device suitable for the electric arc furnace, the electrode connecting and changing device suitable for the electric arc furnace is integrated on a lifting appliance, when an electrode needs to be butted and tightened, an annular tightening assembly is lowered to the position close to the bottom of a new electrode through a winch assembly, and then the electrode is tightened. The electrode is tightened on the carrying table in a force-borrowing mode; when dirt and maintenance are needed, the device can be placed on the ground to be cleaned and maintained; when a fault occurs, the electrode connecting and replacing device and a new electrode can be lifted away together by directly utilizing a workshop crane, and the influence on the electrode butt joint process is small; the electrode connecting and changing device suitable for the electric arc furnace has the technical effects that the electrode connecting and changing device suitable for the electric arc furnace can assist workers in completing electrode connecting and changing operation, the occupied space is small, overhaul, maintenance and cleaning are convenient, the risk is low, and the influence on the electrode butt joint process is small when faults occur.

The invention discloses a micro-structure electrode flexible electrochemical sensor which comprises a flexible electrode substrate with a hemispherical array and three surface electrodes (a working electrode, a counter electrode and a reference electrode). The working electrode comprises a protruding metal array and a through hole array, protruding metal corresponds to the hemisphere array of the substrate, and the through hole array penetrates through the substrate. According to the sensor, the reaction area is increased through the three-dimensional structure, electron transfer is promoted, oxygen supply is guaranteed through the through hole array, the mechanical stability is enhanced through the flexible substrate and the structural design, and the sensor is suitable for wearable equipment.

The invention relates to the field of electrical impedance detection, in particular to a resistance impedance detection probe control method, device and system, and the method comprises the steps: detecting the liquid state characteristics of the environment where a resistance impedance detection probe is located, so as to estimate the liquid ion flowing space distribution information of the surface of the probe; estimating a bioelectricity signal drift change characteristic formed by liquid ions in a detection coverage range corresponding to the electrode, and adjusting an electric signal detection parameter of the electrode; adjusting signal processing parameters of signal processing ends corresponding to the electrodes on the basis of change characteristics of bioelectricity signal queues acquired by all the electrodes on the surface of the probe; and based on the resistance impedance information generated by the signal processing end and the position change information of all the electrodes on the surface of the probe in the environment, a resistance impedance distribution image is generated, so that a resistance impedance abnormal area in the environment is determined. The working state of the probe can be adjusted in the changing process of the liquid environment in the human tissue, and therefore the bio-electricity signal of the liquid environment is accurately detected.

The invention relates to the technical field of plasma, and discloses an electrode fault recognition system and method and a machine readable storage medium. The system comprises: an auxiliary electrode; the electrode displacement device is used for moving the auxiliary electrode to a preset position which is a preset distance away from the to-be-identified electrode, and the auxiliary electrode at the preset position and the to-be-identified electrode form a to-be-identified electrode pair; the voltage detection device is used for detecting the initial discharge voltage of the to-be-identified electrode pair in a preset detection environment when the to-be-identified electrode is in a detection state and the auxiliary electrode moves to a preset position, and the detection state is a state that the to-be-identified electrode discharges in response to the initial discharge voltage; and the control device is used for determining whether the to-be-identified electrode has a fault or not according to the initial discharge voltage and the safety threshold interval. According to the invention, fault detection of any electrode can be realized without dismounting the plasma reactor, the judgment result is more accurate and reliable, and the period and cost of manual maintenance are reduced.

The invention provides a pixel driving circuit, an array substrate and a display device. According to the embodiment of the invention, the first transistor, the pixel electrode and the second transistor are sequentially connected in series, and the first transistor and the second transistor have opposite conduction types, so that a semiconductor layer in the first transistor and a semiconductor layer in the second transistor can form a Peltier pair; the pixel electrode can serve as a hot end or a cold end of a Peltier module, charge and discharge of the pixel electrode are achieved by selectively conducting the first transistor or the second transistor, and the pixel electrode can be charged or discharged by changing the direction of current flowing through the first transistor and the second transistor. The pixel electrode is used for heating or radiating liquid crystal so as to improve the display effect of the liquid crystal panel in a high-temperature or low-temperature environment.

Examples described herein relate to a charging system for wireless earbuds involving charging adapters that are attachable to the wireless earbuds. In some implementations, the charging adapter is attachable to an external surface of an earbud using a magnetic or mechanical interface that align electrodes of the charging adapter with electrodes on the wireless headset, allowing an internal battery of the earbud to draw current and charge from the charging adapter while the earbud is in-ear. Then, when the internal battery is and recharged using a charging case or wall charger, the charging adapter can be detached from the earbud.

A system in accordance with at least some embodiments of the present technology includes a robot and a dock. The robot includes a body and a plurality of legs connected to the body through which the robot is configured to ambulate. The robot further includes a hanger carried by the body and a charge-receiving electrode at the hanger. The dock includes a hook, a charge-dispensing electrode at the hook, and a guide that urges the hanger into alignment with the hook. The system is transitionable between an undocked state and a docked state. In the undocked state, the robot and the dock are spaced apart from one another. In the docked state, the hanger is received at the hook, the dock supports at least a portion of a weight of the robot via the hook, and the charge-receiving electrode is electrically connected to the charge-dispensing electrode.

The invention relates to the technical field of electronic devices, in particular to a single-molecule photoelectric memristor based on photoresponse rotating shaft molecules and a preparation method of the single-molecule photoelectric memristor. The single-molecule electric memristor comprises a light response rotating shaft molecule and a graphene point electrode pair, and the light response rotating shaft molecule is connected between the graphene point electrode pair. When ultraviolet light irradiates the photoresponse rotating shaft molecule, a high conductivity state occurs when the corresponding rotating shaft molecule rotates, and when visible light irradiates the photoresponse rotating shaft molecule, a low conductivity state occurs when the corresponding rotating shaft molecule rotates. Based on this, the monomolecular photoelectric memristor has high and low conductivity bistable states, and can realize rapid and reversible change of the conductivity state, thereby improving response speed, operation efficiency, and stability, flexibility and adaptability of performance. The single-molecule photoelectric memristor provided by the invention is expected to be widely applied to the fields of neuromorphic calculation, artificial intelligence, brain-like calculation and the like. The preparation method provided by the invention is simple and convenient to operate, mild in reaction condition and beneficial to industrial production.

The invention discloses a workpiece detection method, an electrical discharge machine, a computer readable storage medium and a program product, and relates to the technical field of electrical discharge machines, the method is applied to the electrical discharge machine, and the method comprises the steps that a first tool position of a multi-tool-position tool changing device is adjusted to a current operation station, and a target electrode is controlled to machine a to-be-detected workpiece; adjusting a second cutter position of the multi-cutter-position cutter changing device to a current operation position when the target electrode finishes machining one process position on the to-be-detected workpiece or the target electrode finishes machining the to-be-detected workpiece, acquiring a three-dimensional dotting operation parameter of the to-be-detected workpiece, and controlling the target probe to detect the to-be-detected workpiece based on the three-dimensional dotting operation parameter so as to detect the to-be-detected workpiece according to the three-dimensional dotting operation parameter. Obtaining actual dotting data; and obtaining standard point location data of the to-be-detected workpiece, and comparing the actual dotting data with the standard point location data to obtain a workpiece detection result corresponding to the to-be-detected workpiece. The machining efficiency of the spark machine can be improved, and secondary machining of workpieces is reduced.

The invention discloses a high-surge ESD electrostatic suppressor, and relates to the technical field of electrostatic suppressors, the high-surge ESD electrostatic suppressor comprises an insulating substrate, and terminal electrodes are symmetrically arranged on the two sides of the substrate; the plurality of internal electrodes are embedded in the insulating substrate and are electrically connected with the conductive polymer layer; the conductive polymer layer is arranged among the plurality of internal electrodes and is used for ESD energy absorption and conduction; salient point units arranged in an array are arranged between the conductive polymer layer and the internal electrode; connecting interfaces between the insulating substrate and the conductive polymer layer are respectively provided with a transition interface; a frame unit wrapping the outer side of the conductive polymer layer is arranged above the insulating substrate, the two ends of the frame unit are in lap joint with the tops of the end electrodes, the frame unit and the insulating substrate are mutually connected through connecting pieces, and through holes are formed in the positions, corresponding to the connecting pieces, of the end electrodes and the internal electrodes respectively; according to the invention, the long-term ESD suppression stability and reliability of the device are improved.

The invention provides a medical accelerator beam excitation device and a control method thereof, and belongs to the technical field of medical accelerators, and the medical accelerator beam excitation device comprises an integrated exciter which comprises a horizontally arranged first electrode pair and a vertically arranged second electrode pair; the excitation signal source is used for generating a working point excitation signal or a slow extraction excitation signal; the excitation signal source outputs a working point excitation signal or slowly leads out the excitation signal to the power amplification and routing module, and the power amplification and routing module is used for performing power amplification on the received excitation signal and routing the amplified excitation signal to the first electrode pair or the second electrode pair; and the first electrode pair and the second electrode pair are used for applying an excitation effect on the beam current according to the amplified excitation signal. According to the application, the excitation electrode and the power amplification link can be multiplexed, and two functions of working point excitation and slow extraction excitation can be simultaneously realized on one set of device, so that the space of the accelerator is effectively saved.

The invention relates to the technical field of semiconductor devices, in particular to a monomolecular device based on supramolecular induced electrochemical polymerization and a preparation method thereof.The molecular device comprises a graphene point electrode pair and a monomolecular chain, and the monomolecular chain is connected between the graphene point electrode pair; wherein the single molecular chain is formed through supramolecular induced electrochemical polymerization; the host molecule encompasses the guest molecule in the cylindrical cavity of the host molecule to form a supramolecule; the host molecule is selected from cyclodextrin, and the guest molecule is selected from thiophene or thiophene derivatives; the tail ends of the graphene point electrode pairs are modified by amino-containing monomer molecules respectively, the monomer molecules are connected with the graphene point electrode pairs through amido bonds, and the monomer molecules serve as a starting unit and a terminating unit of supramolecular induced electrochemical polymerization, so that assembly of functional cores of a monomolecular device is facilitated; according to the technical scheme provided by the invention, the problem of how to prepare an efficient and reliable monomolecular device by utilizing an electrochemical polymerization method is solved.

The present disclosure provides a plasma reactor (100) for plasma induced chemical conversion of one or more compounds in a fluid medium. The reactor comprising a passage (1); an outlet (3); and at least two electrode pairs. Each electrode (10) comprises a jacket (11), an electrode rod (12), and an inlet (4) for injecting a primary gas (G1) flow along the rod. The rods are distributed around the passage. Rod tips are positioned upstream the throat of the passage. A second inlet (5) injects a secondary gas (G2) upstream or downstream the throat area (2). An operating circuit is driven to repetitively and simultaneously power the electrode pairs to generate an arc discharge (A) bridging the electrodes of each electrode pair. Neighboring electrodes of adjacent pairs are driven at the same time-varying potential. The electrodes are galvanically isolated each other and the power source.