Abstract: A trenchless multi-stage pipe cleaning device and method combining an artificial tornado and dagger-like mechanical sand is provided. The trenchless multi-stage pipe cleaning device includes a primary pipe cleaning device and a secondary pipe cleaning device that are connected. An outer wall of the pipe cleaning device is provided with multiple air inlet joint pipes evenly distributed in a circumferential direction. The air inlet joint pipes are connected to an air compressor. Each of the air outlet joints is connected to a nozzle. The primary pipe cleaning device is connected to a vibrating screen. The trenchless multi-stage pipe cleaning device further includes a back-end sewage discharge device. In the trenchless multi-stage pipe cleaning method, the mechanical sand continuously scrape and collide with the inner wall of the cleaning target, so as to achieve a desired efficient trenchless water-free pipe cleaning effect.

Abstract: An inverter includes a DC input, a link capacitor including a plurality of input contacts fitted to a capacitor housing, a plurality of half-bridges, each including semiconductor switching elements for converting the DC current into an AC current having a plurality of phase currents, wherein the half-bridges are arranged in a row along a transverse direction to the inverter, a positive DC conductor rail and a negative DC conductor rail for the infeed of DC current to the half-bridges, wherein the positive and/or negative DC conductor rail extends in a transverse direction to the inverter over the row of half-bridges, such that the width of the positive and/or negative DC conductor rail extends to the width of the row of half-bridges, an AC conductor rail assembly for the output of AC current to the electric drive, and a cooler for cooling the half-bridges.

Abstract: The present disclosure provides a trenchless multi-stage pipe cleaning device and method combining an artificial tornado and dagger-like mechanical sand. The trenchless multi-stage pipe cleaning device includes a primary pipe cleaning device and a secondary pipe cleaning device that are connected. An outer wall of the pipe cleaning device is provided with multiple air inlet joint pipes evenly distributed in a circumferential direction. The air inlet joint pipes are connected to an air compressor. Each of the air outlet joints is connected to a nozzle. The primary pipe cleaning device is connected to a vibrating screen. The trenchless multi-stage pipe cleaning device further includes a back-end sewage discharge device.

Abstract: Provided is a method for analyzing aliased spectra of alkane gases, including the following steps: firstly separately acquiring second harmonic signals of specified gases at known gas concentrations and calculating an absorbance of each gas; subsequently constructing a low concentration prediction model regarding second harmonic signals and gas concentrations; next constructing a high concentration prediction model regarding absorbances and gas concentrations, immediately followed by acquiring a second harmonic signal of a gas to be measured with an unknown gas concentration and calculating an absorbance of the gas to be measured; and if an absorbance peak of the gas to be measured is less than or equal to a threshold A0, predicting the gas concentration of the gas to be measured using the low concentration prediction model; otherwise, predicting the gas concentration of the gas to be measured using the high concentration prediction model.

Abstract: A power module for an electric axle drive may include a plurality of semiconductor switching elements, where the semiconductor switching elements are attached to a substrate. The power module may also include a control unit electrically connected to the plurality of semiconductor switching elements, where the plurality of semiconductor switching elements includes a first set of semiconductor switching elements dedicated to the electric axle drive. The plurality of semiconductor switching elements may also include a second set of second set of semiconductor switching elements dedicated to a transmission connected to the electric axle drive.

Abstract: A half-bridge includes a substrate, semiconductor switches, power connections and signal connections. The power and signal connections are formed in a flat conductor frame. The signal connections are electrically connected to the semiconductor switches such that they can be switched via the signal connections and the power connections are electrically connected to the semiconductor switches such that they allow or interrupt electricity transfer between the power connections. The semiconductor switches, signal connections, and power connections are on a first surface of the substrate in a casting compound. First end sections of the signal connections formed in the flat conductor frame each extend from a second surface orthogonal to the first surface, exiting the casting compound. Second end sections of the signal connections, which are separate from the flat conductor frame, are connected to the first end section outside the casting compound and are perpendicular to the first surface.

Abstract: A power module includes a plurality of half-bridges, each including a substrate, a plurality of semiconductor switching elements, a positive DC power connection, a negative DC power connection, an AC power connection and a plurality of signal connections, wherein a respective DC busbar is connected to the respective DC power connection, wherein the two DC busbars extend from the half-bridges up to an intermediate circuit capacitor, wherein at least one of the two DC busbars is formed in one piece outside of the intermediate circuit capacitor with respect to the plurality of half-bridges.

Abstract: A symmetrical DC-to-DC boost converter includes two magnetically coupled chokes, of which one choke is connected to a negative DC voltage input in the DC-to-DC boost converter, while the other choke is connected to a positive DC voltage input in the DC-to-DC boost converter, such that a symmetrical topology is obtained with separate DC voltage inputs, wherein the coupled chokes have three cores in a series, each of which is connected at the top and bottom to a connecting core, and there is at least one winding on each of the two outer cores that is dedicated to one of the chokes, while the middle core does not have a winding, and has at least one air gap and/or is at least partially made of a low permeability powdered material, and therefore forms a magnetic energy storage.

Abstract: A link capacitor for a motor vehicle has a housing, a first busbar and a second busbar for electrical contact to the link capacitor, and at least one coupling element. The housing accommodates a winding for the link capacitor. The first busbar and second busbar are connected to the winding. The coupling element is on the housing and designed to couple the link capacitor to an adjacent link capacitor and/or to a support element.

Abstract: An inductor includes a winding that has a predefined inductance, a soft magnetic winding core, and a housing that has a cooling surface for discharging heat from the inductor. This housing encases the winding.

Abstract: A capacitor unit for a power converter, wherein the capacitor unit has a first busbar and a second busbar, and at least one capacitor element placed in between the first busbar and the second busbar, wherein the capacitor element is electrically connected to the first busbar at a first side, and wherein the capacitor element is electrically connected to the second busbar at a second side, lying opposite the first side, and a cooling device, wherein the cooling device is thermally coupled to the first busbar with a surface area contact, wherein the cooling device is designed to remove heat from the first busbar.

Abstract: A power electronics module includes a printed circuit board populated with numerous components of the power electronics module. Power semiconductors and DC and AC connecting elements are either placed adjacently to one another on an organic insulator, and each thermally and mechanically connected to a heat sink through the organic insulator, or the DC and AC connecting elements are placed between the power semiconductors and the heat sink and are thermally and mechanically connected to the heat sink and to the power semiconductors.

Abstract: The present disclosure relates to an MRI system and a method and device for determining a waveform of oblique scanning. Specifically, provided are a magnetic resonance imaging system, a method and device for determining a gradient waveform of oblique scanning, and a computer-readable storage medium.

Abstract: A temperature sensor for an inverter for operating an electric drive in an electric vehicle or hybrid vehicle includes at least one rod-shaped signal connector, a mount, and a sensor printed circuit board, wherein at least one groove is formed in the mount for the at least one rod-shaped signal connector, wherein the at least one rod-shaped signal connector has an insertion part that is inserted in a printed circuit board in the inverter, wherein the insertion part extends beyond an upper edge of the mount facing the printed circuit board, wherein the at least one rod-shaped signal connector extends at the bottom beyond a lower edge of the mount facing away from the printed circuit board, wherein a sensor element for temperature detection is placed on an end of the sensor printed circuit board facing away from the printed circuit board.

Abstract: A power module for supplying electricity to an electric axle drive in an electric vehicle and/or hybrid vehicle may include numerous semiconductor switches for receiving an input current and generating an output current on the basis of the received input current by switching the semiconductor switches, where the semiconductor switches each have a positive current electrode, negative current electrode, and a control electrode, where numerous signal pins are each conductively connected to one of the electrodes, where at least one of the signal pins extends vertically, at least in part, between the electrode connected thereto and a driver.

Abstract: The implementations of the subject matter described herein relate to an octree-based convolutional neural network. In some implementations, there is provided a computer-implemented method for processing a three-dimensional shape. The method comprises obtaining an octree for representing the three-dimensional shape. Nodes of the octree include empty nodes and non-empty nodes. The empty nodes exclude the three-dimensional shape and are leaf nodes of the octree, and the non-empty nodes include at least a part of the three-dimensional shape. The method further comprises for nodes in the octree with a depth associated with a convolutional layer of a convolutional neural network, performing a convolutional operation of the convolutional layer to obtain an output of the convolutional layer.

Abstract: An inverter includes a DC input, a link capacitor including a plurality of input contacts fitted to a capacitor housing, a plurality of half-bridges, each including semiconductor switching elements for converting the DC current into an AC current having a plurality of phase currents, wherein the half-bridges are arranged in a row along a transverse direction to the inverter, a positive DC conductor rail and a negative DC conductor rail for the infeed of DC current to the half-bridges, wherein the positive and/or negative DC conductor rail extends in a transverse direction to the inverter over the row of half-bridges, such that the width of the positive and/or negative DC conductor rail extends to the width of the row of half-bridges, an AC conductor rail assembly for the output of AC current to the electric drive, and a cooler for cooling the half-bridges.

Abstract: The present disclosure relates to an MRI system and a method and device for determining a waveform of oblique scanning. Specifically, provided are a magnetic resonance imaging system, a method and device for determining a gradient waveform of oblique scanning, and a computer-readable storage medium.

Abstract: A half-bridge having power connections and signal connections shaped from a leadframe, the signal connections electrically connected to semiconductor switching elements so that they can be switched by the signal connections, and the power connections are electrically connected to the switching elements in so that they switch an electrical power transmission between the power connections. The switching elements are embedded in a modular layer system including a contact-connection plane and a metallization for contact-connecting the switching elements, the signal connections and the power connections are arranged on a first surface of the substrate.

Abstract: A power converter, for a vehicle that is at least partially electrically powered, has a first printed circuit board with DC link capacitors, a circuit breaker group for each alternating current phase, and terminals for alternating current busbars and direct current busbars. A second printed circuit board has a control apparatus for actuating the circuit breaker groups. Also, it has a respective signal pin carrier for the respective circuit breaker group. The signal pin carrier connects the first and the second printed circuit board. Thus, signals between the first and the second printed circuit board can be transmitted via the respective signal pin carrier. The signal pin carrier has six signal pins that are arranged on a plastic carrier.