Abstract: A deep-sea crawling robot and a crawling method thereof are provided. The deep-sea crawling robot includes a crawling robot body and a countertop, wherein a top of the crawling robot body is fixedly connected to the countertop, left and right sides of a bottom of the crawling robot body are respectively provided with crawler belts, and left and right sides of the countertop are respectively provided with weight-increasing auxiliary crawling mechanisms; and an outer plate is fixedly connected to a front side or back side of the countertop, a multifunctional propelling mechanism is arranged on the outer plate, and a rapid dewatering mechanism is arranged in a chamber of the countertop. The deep-sea crawling robot can not only accelerate the propulsion and crawling speed when it is on the seabed but also further enhance its stability during the crawling process on the seabed.

Abstract: The embodiments of the disclosure provide a method and device for video preview. The method includes: with the determination of a need to enter a video preview interface, obtaining a respective preview control corresponding to at least one playback position for playing a preview video in a video preview interface; loading video data of respective one way of preview video corresponding to each of the preview controls; and playing the video data of the respective one way of preview video in each of preview controls. The embodiments of the disclosure can reflect preview video contents accurately in real time, allowing the user to rapidly and accurately find the desirable video, improving the user experience. The video preview manner may have enhanced universality, especially applicable to the preview of the videos having varied contents in real time such as live broadcast and carousel.

Abstract: The embodiments of the disclosure provide a method and device for switching channel. Method includes: when a first touch gesture for a first channel is detected, loading at least one channel display window after an enlargement processing; displaying channel information of the first channel on the channel display window of a display interface; when a second touch gesture is detected, moving the channel information displayed on channel display windows based on a direction of the second touch gesture; and when the channel information of the second channel is displayed on the channel display window of the display interface, playing back video data of the second channel. In the embodiments of the disclosure, the displaying of channel information informs user of the channel which can be triggered by the touch gesture, and the switching of channel information informs user of the timing of channel switch.

Abstract: The embodiments of the present invention provide a method and a device for previewing and displaying multimedia streaming data, wherein the method includes: when a terminal displays a designated interface, determining a thumbnail display area corresponding to at least one previewing and playing area preset in the designated interface, acquiring multimedia streaming data corresponding to the previewing and playing area, loading a floating layer playing control in the previewing and playing area, and previewing and playing the multimedia streaming data.

Abstract: The embodiments of the disclosure provide a method and device for switching channel. The method comprises: when a first touch gesture for a first channel is detected, loading a first channel display window; displaying channel information of the first channel on the first channel display window; according to a detected second touch gesture, moving at least a portion of channel information of the first channel out of and moving at least a portion of channel information of a second channel into the first channel display window; and when the moved-out channel information of the first channel or the moved-in channel information of the second channel satisfies a predefined switching condition, playing back video data of the second channel. The displaying of channel information informs user of the channel which can be triggered by the touch gesture, and the switching of channel information informs user of the timing of channel switch.

Abstract: The present invention discloses an optical line transmission protection system and method. In which, the optical line transmission protection system includes: at least one stage of optical line protection segment having a transmitting end provided with a Tunable Optical Divide Module (TOD), and a receiving end provided with an OSW; the transmitting end of a local Optical Line Protector (OLP) is connected to the receiving end of an opposite OLP to form main and standby optical lines; and the TOD is configured to set splitting ratios of the main and standby optical lines according to a difference between the optical fiber states of the current working channel and non-working channel, and tune optical power distributions at respective transmitting ends of the main and standby optical lines, according to the splitting ratios of the main and standby optical lines.

Abstract: The present invention discloses an optical line transmission protection system and method. In which, the optical line transmission protection system includes: at least one stage of optical line protection segment having a transmitting end provided with a Tunable Optical Divide Module (TOD), and a receiving end provided with an OSW; the transmitting end of a local Optical Line Protector (OLP) is connected to the receiving end of an opposite OLP to form main and standby optical lines; and the TOD is configured to set splitting ratios of the main and standby optical lines according to a difference between the optical fiber states of the current working channel and non-working channel, and tune optical power distributions at respective transmitting ends of the main and standby optical lines, according to the splitting ratios of the main and standby optical lines.

Abstract: An upgrading method, a system, and an apparatus of a low-density wavelength division multiplexing (WDM) system are provided. The method includes: detecting an output wavelength shift of a wavelength conversion unit, and adjusting an output wavelength of the wavelength conversion unit having the output wavelength shift higher than a threshold, so that the output wavelength shift of the wavelength conversion unit is lower than the threshold; adjusting an adjustable interleaved demultiplexer, until requirements for a demultiplexing parameter of a high-density WDM system are met. Thus, the problem that services are interrupted when a low-density MDM system is upgraded to a high-density MDM system is solved. A WDM system, and a wavelength multiplexing/demultiplexing apparatus and method are also provided.

Abstract: An upgrading method, a system, and an apparatus of a low-density wavelength division multiplexing (WDM) system are provided. The method includes: detecting an output wavelength shift of a wavelength conversion unit, and adjusting an output wavelength of the wavelength conversion unit having the output wavelength shift higher than a threshold, so that the output wavelength shift of the wavelength conversion unit is lower than the threshold; adjusting an adjustable interleaved demultiplexer, until requirements for a demultiplexing parameter of a high-density WDM system are met. Thus, the problem that services are interrupted when a low-density MDM system is upgraded to a high-density MDM system is solved. A WDM system, and a wavelength multiplexing/demultiplexing apparatus and method are also provided.