Abstract:
A folder management method and device. The method includes: displaying a folder icon on the touchscreen display, and displaying a drag mark in a first position of the folder icon; detecting a first drag operation to the drag mark, where the first drag operation is used to increase a size of an icon of an application in a folder; and when the first drag operation is detected, displaying, on the touchscreen display, an icon that is of at least one application in at least two applications and that is inside the folder icon, where the icon is enlarged for display. In this way, icons, of some applications, in the folder icon can be enlarged for display, which facilitates management of applications in the folder.
Abstract:
The present invention discloses a switching device. The switching device includes: a reverse voltage conduction module, configured to receive a first voltage, where the reverse voltage conduction module is further configured to conduct the first voltage after receiving the first voltage; and a switching circuit, configured to switch, by using the first voltage conducted by the reverse voltage conduction module, a device connected to a terminal device from a source device to a target device, so that the terminal device reversely supplies power to the target device. This can reduce engineering complexity and reduce human costs.
Abstract:
This application provides a display device and an audio output method thereof. The display device includes a display, a first speaker, and a second speaker. The first speaker is disposed on a rear side of the display. A sound emitting direction of the first speaker faces toward space in rear of and above the display device. A sound emitting direction of the second speaker faces toward space in front of the display device or faces toward space below the display device. The first speaker and the second speaker emit sounds asynchronously. A stereo effect of the display device in this application is good.
Abstract:
This application provides a dispersion compensation method, an apparatus, and a storage medium. The method includes: obtaining a subcarrier allocation result, where the subcarrier allocation result includes subcarriers allocated to at least two receive ends based on signal-to-noise ratio results of signals transmitted between the transmit end and at least two receive ends; compensating, based on a correspondence between a communication distance and dispersion compensation value, a subcarrier allocated to each receive end for a dispersion compensation value corresponding to a first communication distance and, to obtain a compensated signal; adding a cyclic prefix CP to the compensated signal; compensating a frequency-domain subcarrier corresponding to the signal to which the CP has been added, for the dispersion compensation value corresponding to a second communication distance. This application effectively alleviate a fading phenomenon caused by fiber dispersion, and help improve performance of an optical communications system.
Abstract:
A folder management method and device. The method includes: displaying a folder icon including a set of icons of at least two applications, and the set of icons is displayed as a thumbnail icon, and, in the thumbnail icon, each of the icons of the at least two applications is displayed in a shrunk size, and the folder icon further including an enlarged first icon associated with a first application, where the enlarged first icon is displayed adjacent to the thumbnail icon without the first icon, and where a size of the enlarged first icon is a same size as the thumbnail icon. The enlarged icon can be changed or displayed more according to application usage.
Abstract:
Embodiments of the present invention provide a digital predistortion processing method and a user terminal, which relate to the field of communications, and can simplify the structure of a digital predistortion apparatus and reduce the cost. The method includes: setting a control command; and tuning, when the control command is selecting a data collection mode as the working mode of a receive channel, the frequency of a local oscillator and the central frequency of a band-pass filter in the receive channel to the transmitting frequency of the user terminal, so that the user terminal performs predistortion factor update. The embodiments of the present invention are applied to the user terminal for digital predistortion processing.
Abstract:
Embodiments of the present invention provide a temperature compensation method and a crystal oscillator, where the crystal oscillator includes a crystal oscillation circuit unit, a temperature sensor unit, an oscillation controlling unit, a relative temperature calculating unit, and a temperature compensating unit. The temperature sensor unit measures a measured temperature of the crystal oscillation circuit unit; the relative temperature calculating unit obtains a temperature difference between the measured temperature and a reference temperature; the temperature compensating unit obtains a temperature compensation value corresponding to the temperature difference from a temperature-frequency curve; and the oscillation controlling unit generates a frequency control signal, according to a frequency tracked by a communications AFC device and the temperature compensation value, thereby controlling a frequency of the crystal oscillation circuit unit to work on the tracked frequency.
Abstract:
Embodiments of this application disclose an optoelectronic component and a fabrication method thereof. The optoelectronic component includes a capacitor, an inductor, a carrier component, and an optoelectronic element, where the capacitor, the inductor, and the optoelectronic element are all disposed on the carrier component. The inductor and the capacitor are configured to form a resonant circuit, where a resonance frequency of the resonant circuit is correlated with a signal output frequency of the optoelectronic element. A first electrode of the optoelectronic element is connected to a first electrode of the carrier component through the inductor, and a second electrode of the optoelectronic element is connected to a second electrode of the carrier component. A first electrode of the capacitor is connected to the first electrode of the carrier component, and a second electrode of the capacitor is connected to the second electrode of the carrier component.
Abstract:
This application relates to the communications field, and discloses a signal transmitting method and apparatus, a transmitter, and a signal transmission system. An example method includes: generating a real-number-type signal; performing phase rotation processing on the real-number-type signal to obtain a complex-number-type signal, where a value of a real part signal of the complex-number-type signal is equal to a value of an imaginary part signal of the complex-number-type signal; and transmitting the complex-number-type signal to a receiver.
Abstract:
According to a transmitter, a receiving device, and a frequency offset correction method that are provided in embodiments of the present invention, after a power parameter of a pilot in an OFDM signal received by a receiving device is detected, a frequency offset value used to indicate a degree and a direction that are of a difference that is between a center frequency of a filter and a center frequency of a laser and that deviates from a first threshold is determined according to the power parameter of the pilot, and then the receiving device corrects the difference between the center frequency of the laser and the center frequency of the filter according to the determined frequency offset value, thereby implementing frequency offset correction of an OFDM system.