Abstract: The present invention relates to a context-based QA generation architecture, and an object of the present invention is to generate diverse QA pairs from a single context. To achieve the object, the present invention includes a latent variable generating network including at least one encoder and an artificial neural network (Multi-Layer Perceptron: MLP) and configured to train the artificial neural network using a first context, a first question, and a first answer, and generate a second question latent variable and a second answer latent variable by applying the trained artificial neural network to a second context, an answer generating network configured to generate a second answer by decoding the second answer latent variable, and a question generating network configured to generate a second question based on a second context and the second answer.

Abstract: The present invention relates to a method for reinforcing a multiple-choice QA model based on adversarial learning techniques, wherein incorrect answers are further generated based on a data set used in the process of training the multiple-choice QA model to enrich data which are learnable by the multiple-choice QA model.

Abstract: A wireless signal spectral analysis method using a multi-task learning-based spectral analysis learning model, the wireless signal spectral analysis method may be provided.

Abstract: An operating method of a server operating a digital twin built into a virtual space for a plurality of base stations and a plurality of mobile devices may be provided. The operating method according to an embodiment of the present disclosure may include: invoking a digital twin-based beamforming management service; obtaining location information about a target mobile device from among the plurality of mobile devices and a target base station corresponding to the target mobile device; searching for a plurality of paths capable of forming a beam from the target base station to the target mobile device based on the location information and spatial information of the digital twin; performing a first communication performance simulation for the plurality of paths; determining a final beamforming parameter based on a result of the first communication performance simulation; and transmitting beamforming information including the final beamforming parameter to the target base station.

Abstract: A bulk acoustic wave filter device and method thereof includes a first layer forming an air gap together with a substrate, a lower electrode disposed over the first layer, a piezoelectric layer disposed to cover a portion of the lower electrode, an upper electrode disposed over the piezoelectric layer, a frame layer disposed below the upper electrode, and a lower electrode reinforcing layer disposed on the lower electrode, other than portions in which the piezoelectric layer is disposed. The lower electrode reinforcing layer is formed by separating the lower electrode reinforcing layer from the upper electrode or the frame layer upon one of the upper electrode and the frame layer being formed.

Abstract: A bulk acoustic wave filter device and method thereof includes a first layer forming an air gap together with a substrate, a lower electrode disposed over the first layer, a piezoelectric layer disposed to cover a portion of the lower electrode, an upper electrode disposed over the piezoelectric layer, a frame layer disposed below the upper electrode, and a lower electrode reinforcing layer disposed on the lower electrode, other than portions in which the piezoelectric layer is disposed. The lower electrode reinforcing layer is formed by separating the lower electrode reinforcing layer from the upper electrode or the frame layer upon one of the upper electrode and the frame layer being formed.

Abstract: A bulk acoustic wave (BAW) filter includes: a substrate including a first mounting region and a second mounting region which are spaced apart from each other; a first fixing member disposed adjacent to the first mounting region; a second fixing member disposed adjacent to the second mounting region; a Tx filter mounted on the first mounting region and fixed by the first fixing member; and an Rx filter mounted on the second mounting region and fixed by the second fixing member.

Abstract: There is provided a driving circuit for a hybrid electric vehicle, including a first battery and a second battery, an inverter for converting an applied voltage to the form of direct current (DC) or alternating current (AC) according to the operating mode of the motor, a converter operating in a boost mode or a buck mode according to the operating mode of the motor, and a processor for comparing a voltage (VB1) of the first battery and a voltage of a DC-link capacitor and controls electrical connection between the first battery, and the inverter and the converter during start-up, wherein the DC-link capacitor is connected in parallel to the first battery, the inverter, and the converter.

Abstract: There is provided a driving apparatus of an interior permanent magnet synchronous motor (IPMSM) including a current command generator outputting a current command on a synchronous reference frame based on a command torque, wherein the current command generator generates the current command based on a variation in magnetic flux with respect to a rotor of the IPMSM.

Abstract: There is provided a driving circuit for a hybrid electric vehicle, including a first battery and a second battery, an inverter for converting an applied voltage to the form of direct current (DC) or alternating current (AC) according to the operating mode of the motor, a converter operating in a boost mode or a buck mode according to the operating mode of the motor, and a processor for comparing a voltage (VB1) of the first battery and a voltage of a DC-link capacitor and controls electrical connection between the first battery, and the inverter and the converter during start-up, wherein the DC-link capacitor is connected in parallel to the first battery, the inverter, and the converter.

Abstract: Embodiments of the invention provide a method and system for controlling a motor of an electric bicycle. According to various embodiments, the system includes a touch sensor positioned in a handle of the electric bicycle, configured to sense whether or not a user has touched the touch sensor, and configured to output a touch signal, and a controller configured to control driving of a driving motor. The controller is further configured to drive the driving motor only in the case in which the user's touch is sensed from the touch sensor.

Abstract: There is provided a driving apparatus of an interior permanent magnet synchronous motor (IPMSM) including a current command generator outputting a current command on a synchronous reference frame based on a command torque, wherein the current command generator generates the current command based on a variation in magnetic flux with respect to a rotor of the IPMSM.

Abstract: A motor driving apparatus having a protection function for protecting an inverter or a controller from a back electromotive voltage may include: a driving unit including at least one inverter arm switching driving power to drive a motor; a first switching unit forming a transfer path through which a back electromotive voltage from the motor is transferred to a charging unit; and a second switching unit including at least one switch positioned between a driving line of the driving unit and the motor and turned on and off at a preset interval to decrease a voltage level of the back electromotive voltage from the motor.

Abstract: A motor driving apparatus may include a bidirectional converter including an energy storage unit and converting power bidirectionally; an inverter receiving the power from the bidirectional converter and driving a motor; and a power passing unit transferring energy stored in the energy storage unit of the bidirectional converter to the inverter.

Abstract: Disclosed herein are a parallel structure power apparatus and a control method thereof. There are provided a parallel structure power apparatus, including: an alternating current-direct current (AC-DC) converting unit, a main driving unit, a sub-driving unit, a temperature sensor unit measuring and outputting a temperature of the main driving unit and the sub-driving unit, and a controlling unit separately controlling the main driving unit or the sub-driving unit according to a state of the motor to rotate the motor and controlling the main driving unit or the sub-driving unit so that the main driving unit or the sub-driving unit which is being driven is turned off and the main driving unit or the sub-driving unit which is in a stop state is driven when the temperature measured by the temperature sensor unit becomes a predetermined temperature or more, and a control method thereof.

Abstract: Disclosed herein are a motor driving apparatus and method. The motor driving apparatus includes: an inverter including a main driver sequentially activating N phases and a spare driver activating a spare phase substituting for a faulted phase among the activated N phases; a detecting unit detecting the respective output signals of the N phases; a switching unit performing switching so that the spare phase is connected to the faulted phase of the exited N phases; and a controlling unit driving the inverter to determine whether or not a fault is generated and control the switching unit so that the faulted phase is connected to the spare phase. Therefore, since the motor may be driven without replacing the inverter, a cost may be reduced, and since the motor may be driven without a change in the number of phases, the motor may be efficiently and stably driven.

Abstract: Disclosed herein are an apparatus and a method of driving a switched reluctance motor. The apparatus includes: a power supply unit; N pairs of coils; N pairs of upper switch devices each connected in series with an upper portion of each of the N pairs of coils; N pairs of lower switch devices each connected in series with a lower portion of each of the N pairs of coils; 2N first freewheel diodes; 2N second freewheel diodes; and a switch driving unit providing a control signal to the N pairs of upper switch devices and the N pairs of lower switch devices to sequentially supply current to the N pairs of coils.