Abstract: A double-sided polishing method for an optical lens belongs to the technical field of ultra-precision machining. In the double-sided polishing method, upper and lower surfaces of the lens are polished simultaneously by arranging abrasive tools on upper and lower positions of the lens, making the abrasive tools close to the upper and lower surfaces of the lens to swing back and forth in the polishing process, producing relative motion and removing the surface materials. In the present invention, in order to eliminate a problem of removal ununiformity, a method for swing machining of abrasive tools and methods for turning over and polishing of workpieces are adopted in a polishing process, which can realize the high efficiency double-sided high-precision machining for a nonplanar lens, and the method can be applied to the double-sided polishing for different types of lenses.

Abstract: A tapping apparatus adapted for tapping a workpiece includes a lower die unit to drive the workpiece to move along a conveying direction, and an upper die unit disposed above and movable upwardly and downwardly relative to the lower die unit. A tapping mechanism is disposed between the lower and upper die units to be driven by the upper die unit for tapping the workpiece so that the workpiece is formed with a tapped hole. A thread checking mechanism is disposed between the lower and upper die units and is spaced apart from the tapping mechanism along the conveying direction. The thread checking mechanism is driven by the upper die unit for checking the tapped hole of the workpiece.

Abstract: A frequency extraction filter is disclosed. The frequency extraction filter can include a resonator that is coupled to a first node, and a phase shifter that is connected to the resonator in series. The phase shifter is coupled to a second node such that the resonator and the phase shifter are positioned between the first and second nodes. Impedance between the first and second nodes has an order of four or more.

Abstract: A frequency extraction filter is disclosed. The frequency extraction filter can include a resonator that is coupled to a first node, and a phase shifter that is connected to the resonator in series. The phase shifter is coupled to a second node such that the resonator and the phase shifter are positioned between the first and second nodes. Impedance between the first and second nodes has an order of four or more.

Abstract: Provided herein is a power distribution system comprising a main power bus, sub-buses coupled to the main power bus, and a controller. The sub-buses provide power to electrical components of a vehicle. Each of the sub-buses includes an electrically programmable fuse in series with a relay. The controller is configured to detect a fault in a sub-bus of the sub-buses, determine a fault type associated with the fault, and in response to determining the fault type, generate a command to cause the relay to change a relay state.

Abstract: An information pushing method and apparatus. The method includes extracting preference attributes of a user from user dialogue information in the current dialogue scene; determining effective attribute nodes corresponding to the preference attributes in a preconstructed knowledge graph; arranging the effective attribute nodes according to a dialogue time sequence to generate a dialogue path; determining a candidate attribute set and a candidate commodity set on the basis of the dialogue path; using a pretrained strategy prediction model to predict the current pushing strategy on the basis of the current state vector; determining, on the basis of the current pushing strategy, an object to be pushed from the candidate attribute set or the candidate commodity set, and generating, on the basis of said object, information to be pushed; and pushing the information to be pushed.

Abstract: A transmission line can include a first conductive line, a second conductive line, a signal line disposed between the first conductive line and the second conductive line, with a first gap between the signal line and the first conductive line, and a second gap between the signal line and the second conductive line. A first shield can be disposed directly over a portion of the first gap, and a second shield can be disposed directly over a portion of the second gap. A slot can separate the first shield from the second shield. The transmission line can be a coplanar waveguide.

Abstract: A transmission line can include a first conductive line, a second conductive line, a signal line disposed between the first conductive line and the second conductive line, with a first gap between the signal line and the first conductive line, and a second gap between the signal line and the second conductive line. A first shield can be disposed directly over a portion of the first gap, and a second shield can be disposed directly over a portion of the second gap. A slot can separate the first shield from the second shield. The transmission line can be a coplanar waveguide.

Abstract: A double-sided polishing method for an optical lens belongs to the technical field of ultra-precision machining. In the double-sided polishing method, upper and lower surfaces of the lens are polished simultaneously by arranging abrasive tools on upper and lower positions of the lens, making the abrasive tools close to the upper and lower surfaces of the lens to swing back and forth in the polishing process, producing relative motion and removing the surface materials. In the present invention, in order to eliminate a problem of removal ununiformity, a method for swing machining of abrasive tools and methods for turning over and polishing of workpieces are adopted in a polishing process, which can realize the high efficiency double-sided high-precision machining for a nonplanar lens, and the method can be applied to the double-sided polishing for different types of lenses.

Abstract: Aspects of this disclosure relate to a parallel hybrid acoustic passive filter. The parallel hybrid acoustic passive filter includes a first sub-filter and a second sub-filter. The first sub-filter includes a first acoustic resonator and a first non-acoustic passive component. The second sub-filter includes a second acoustic resonator and second first non-acoustic passive component. The first sub-filter and the second sub-filter are together arranged to filter a radio frequency signal. The parallel hybrid acoustic filter can be a band pass filter or a band stop filter, for example. Related multiplexers, wireless communication devices, and methods are disclosed.

Abstract: An impedance matching apparatus for providing impedance matching for an RF component. The apparatus includes a balun transformer circuit having a primary coil at an input side of the balun transformer circuit. The primary coil can be connected to a signal source to receive an input signal from the signal source.

Abstract: Aspects of this disclosure relate to hybrid acoustic LC filter with harmonic suppression. The hybrid acoustic LC filter includes a hybrid passive/acoustic and a non-acoustic LC filter cascaded with the hybrid passive/acoustic filter. The hybrid passive/acoustic filter can be configured to filter a radio frequency signal. The hybrid passive/acoustic filter can include acoustic resonators and a non-acoustic passive component. The non-acoustic LC filter can be configured to suppress a harmonic of the radio frequency signal. The non-acoustic LC filter can be a low pass filter or a harmonic notch filter, for example. Related multiplexers, wireless communication devices, and methods are disclosed.

Abstract: Provided herein is a power distribution system comprising a main power bus, sub-buses coupled to the main power bus, and a controller. The sub-buses provide power to electrical components of a vehicle. Each of the sub-buses includes an electrically programmable fuse in series with a relay. The controller is configured to detect a fault in a sub-bus of the sub-buses, determine a fault type associated with the fault, and in response to determining the fault type, generate a command to cause the relay to change a relay state.

Abstract: Aspects of this disclosure relate to a parallel hybrid acoustic passive filter. The parallel hybrid acoustic passive filter includes a first sub-filter and a second sub-filter. The first sub-filter includes a first acoustic resonator and a first non-acoustic passive component. The second sub-filter includes a second acoustic resonator and second first non-acoustic passive component. The first sub-filter and the second sub-filter are together arranged to filter a radio frequency signal. The parallel hybrid acoustic filter can be a band pass filter or a band stop filter, for example. Related multiplexers, wireless communication devices, and methods are disclosed.

Abstract: Aspects of this disclosure relate to hybrid acoustic LC filter with harmonic suppression. The hybrid acoustic LC filter includes a hybrid passive/acoustic and a non-acoustic LC filter cascaded with the hybrid passive/acoustic filter. The hybrid passive/acoustic filter can be configured to filter a radio frequency signal. The hybrid passive/acoustic filter can include acoustic resonators and a non-acoustic passive component. The non-acoustic LC filter can be configured to suppress a harmonic of the radio frequency signal. The non-acoustic LC filter can be a low pass filter or a harmonic notch filter, for example. Related multiplexers, wireless communication devices, and methods are disclosed.

Abstract: Aspects of this disclosure relate to a multiplexer with a hybrid acoustic passive filter. The multiplexer includes a plurality of filters configured to filter respective radio frequency signals, a shared filter coupled between each of the plurality of filters and a common node, and a radio frequency filter coupled to the common node. At least a first filter of the plurality of filters includes acoustic resonators and a non-acoustic passive component. Related multiplexers, wireless communication devices, and methods are disclosed.

Abstract: Provided herein is a power distribution system comprising a main power bus, sub-buses coupled to the main power bus, and a controller. The sub-buses provide power to electrical components of a vehicle. Each of the sub-buses includes an electrically programmable fuse in series with a relay. The controller is configured to detect a fault in a sub-bus of the sub-buses, determine a fault type associated with the fault, and in response to determining the fault type, generate a command to cause the relay to change a relay state.

Abstract: Crossbar switches for coarse phase shifting are disclosed. In certain embodiments, a mobile device includes an antenna array including a plurality of antennas. The mobile device further includes a front end system coupled to the antenna array and including a plurality of signal conditioning circuits each including a phase shifter. The plurality of signal conditioning circuits each provide phase shifting to a respective one of a plurality of radio frequency signals based on a fine control signal. The front end system further includes a crossbar switch coupled to the plurality of signal conditioning circuits and configured to provide phase shifting to the plurality of radio frequency signals based on a coarse control signal.

Abstract: Provided herein is a power distribution system comprising a feedback circuit including a transistor in series with a relay, the feedback circuit regulating regulate a main power path including a main power supply connected in series with an electric power converter. The power distribution system further comprises OR-ing controllers that regulate the main power path and a backup power path including a low-voltage battery. The power distribution system further comprises terminals through which power from the main power path or the backup power path is transmitted to respective components corresponding to channels. The power distribution system further includes a microcontroller that acquires data in each of the channels and control operations associated with each of the channels based on the acquired data.

Abstract: Aspects of this disclosure relate to a multiplexer with a hybrid acoustic passive filter. The multiplexer includes a plurality of filters configured to filter respective radio frequency signals, a shared filter coupled between each of the plurality of filters and a common node, and a radio frequency filter coupled to the common node. At least a first filter of the plurality of filters includes acoustic resonators and a non-acoustic passive component. Related multiplexers, wireless communication devices, and methods are disclosed.