Abstract: Provided are a display apparatus and a process method for the display apparatus. The display apparatus includes a display; a communicator, communicating with the network; a remote controller; a memory; and a processor configured for executing instructions in the memory to cause the display apparatus to perform: obtaining video source information from a target video source currently played by the display, where the video source information includes signal source information and type information; determining picture modes corresponding to the target video source according to the signal source information and the type information; displaying the picture modes corresponding to the target video source in a picture mode list; in response to a selection instruction for selecting a target picture mode, obtaining image adjustment parameters corresponding to the target picture mode; and adjusting image quality of the target video source according to the image adjustment parameters.

Abstract: This disclosure generally relates to power generation methods and systems based on gas turbine engines, and particularly to mobile and adaptive power generation systems and methods based on gas turbine engine for supplying mechanical and/or electrical power for fracturing operations at an oil wellsite. Various systems, platforms, components, devices, and methods are provided for flexibly and adaptively configure one of more gas turbines, hydraulic pumps, and electric generators to support both fracturing and electric demands at a well site. The disclosed implementations enable and facilitate a mobile, adaptive, and reconfigurable power system to provide both mechanical and electric power for hydraulic fracturing operation.

Abstract: Embodiments of the present disclosure provide a network congestion control method, where the method includes: sending, by a transmit end device, forward probe packets to a destination device at a preset initialized rate, where some or all of the forward probe packets arrive at the destination device after being rate-limited forwarded by using a reserved bandwidth of an egress port of an intermediate device in a network; receiving return probe packets returned by the destination device, where the return probe packets correspond to the probe packets received by the destination device; and determining a data packet sending rate based on the received return probe packets, and sending a data packet at the data packet sending rate.

Abstract: The present disclosure relates to service satellite running status diagnosis methods and apparatuses. In one example method, a ground user terminal detects attribute information of a service beam, where the service beam is transmitted by a service satellite. If the attribute information of the service beam is abnormal, the ground user terminal generates an evaluation report of the service beam, and sends the evaluation report to a satellite controller. The satellite controller receives a plurality of evaluation reports sent by a plurality of ground user terminals, and generates a diagnosis report of the service beam based on the plurality of evaluation reports.

Abstract: Disclosed is a gas fuel supply system including a main fuel inlet, a pressure regulating valve, a pneumatically controlled shutoff bleeder valve and a main fuel outlet that are connected through pipes. The pneumatically controlled shutoff bleeder valve includes a pneumatic control valve and a shutoff bleeder valve. The shutoff bleeder valve is configured to open or close a gas fuel delivery passage from the main fuel inlet to the main fuel outlet, or configured to discharge the gas fuel in the pipe. The pneumatic control valve is configured to control the shutoff bleeder valve to be in a desired state. The gas fuel supply system does not need connection to an additional gas source, and the gas supply stability is improved.

Abstract: In an embodiment, a source node assigns a first number to a probe data packet in a probe data flow in a sending sequence, where the first number is used to select a transmission path for the probe data packet. The source node sends the probe data packet in the probe data flow to a destination node at a first sending rate. Each time the source node receives a probe data packet backhauled by the destination node, the source node sends a service data packet in a service data flow, where the service data packet is assigned a second number corresponding to the probe data packet, and the second number is used to select a transmission path for the service data packet.

Abstract: Embodiments of the present disclosure provide a transport vehicle and an installation method for a case of a mobile power generation system. The transport vehicle includes: a chassis and a lifting mechanism assembly located on the chassis. The lifting mechanism assembly includes: a turning frame hinged to the chassis at a hinged position of the chassis, at least one turning hydraulic cylinder connected to the turning frame and the chassis, and a connecting frame configured to be detachably connected to the case. In the main beam, the first body portion is located between the hinged position and the second body portion, and a third plane in which a surface of the second body portion facing towards the turning frame is located is farther away from the connecting frame than the first plane.

Abstract: The present invention discloses a double-swing angle spindle head, in which an A-axis swing shaft is connected to the spindle head through the flange on the end face to realize the swing of the A-axis, and a crank connecting rod mechanism composed of a first rotating shaft, a second rotating shaft, a B-axis rotating shaft and a swing connecting rod realizes the swing of the B-axis under the push-pull action of the B-axis mechanism. Under the action of the linear push-pull mechanism, the linear axis feed movement between a ram and a saddle is realized. Thus, the freedom of movement range of the spindle head is improved, the rigidity, torque and precision of the spindle head are enhanced, and the volume and weight of the spindle head equipment are reduced.

Abstract: The present invention provides a multi-connecting rod linkage angle attachment head, including: a casing, a drive mechanism, and a spindle. The drive mechanism includes: a power mechanism, a connecting rod mechanism, and a fixing frame. The fixing frame is fixedly connected to an inner wall of the casing, and the power mechanism is fixedly connected to the fixing frame. The connecting rod mechanism includes: a first connecting rod, a second connecting rod and a third connecting rod. An end of the first connecting rod is rotatably connected to the fixing frame, and is fixedly connected to an output end of the power mechanism. The other end of the first connecting rod is rotatably connected to an end of the third connecting rod via a first pin. The other end of the third connecting rod is rotatably connected to an end of the second connecting rod via a second pin. The other end of the second connecting rod is fixed on a side wall of the spindle.

Abstract: A DC-DC power converter employs a full bridge series resonant converter topology with a resonant tank and two transformers, one before and one after the resonant tank, to obtain a high voltage (e.g., approximately 300V, approximately 1500V or greater) output from a relatively low voltage (e.g., approximately 9V-16V) input, for instance an input from one or more battery cells. DC-DC power converter is operable to output high voltage (e.g., around 300V, 1500V or higher) short duration pulses (e.g., tens of nanoseconds or less). A burst mode control technique provides as good regulation characteristics at light loads. Instead of turning OFF the active switches during an OFF period, the switches are operated at a different frequency (e.g., higher frequency) during the OFF period than a frequency at which the switches are turned ON during the ON period. Auxiliary loads can also be supplied.

Abstract: The present invention discloses a belt-transmission angle attachment head, including a housing, a power mechanism, a transmission mechanism and a spindle; the power mechanism and transmission mechanism are arranged in the housing; the power mechanism includes a servo motor and a reducer, the servo motor is connected to the reducer, and an input shaft of the reducer is vertically arranged with respect to an output shaft of the reducer; the transmission mechanism includes a driving wheel, a transmission belt and a driven wheel, and the driving wheel is mounted on the output shaft of the reducer; a side of the spindle is mounted on the housing via a rotating shaft, an end of the rotating shaft away from the spindle is mounted with the driven wheel, the driving wheel and the driven wheel are connected via the transmission belt, and the spindle and the power mechanism are located on the same side of the transmission mechanism.

Abstract: The present invention provides a linkage swing head structure, including: a base, a drive mechanism and a spindle. The drive mechanism includes: a power mechanism, a connecting rod mechanism and a lead screw. An end of the spindle is fixed with a cutter, and the spindle is fixed on an end of the connecting rod mechanism. An end of the connecting rod mechanism fixed with the spindle is sleeved on a support bearing, the connecting rod mechanism can rotate around the support bearing, the support bearing is fixed on the base, and the other end of the connecting rod mechanism is movably connected to the lead screw. An output end of the power mechanism is connected to an end of the lead screw. The connecting rod mechanism adjusts the rotation angle of the spindle by sliding on the lead screw. The drive mechanism of the present invention is far away from the spindle, and the interference range thereof to the spindle is small.

Abstract: A multi-axis turntable includes a base, a rocker arm and a first driving device capable of driving the rocker arm to rock around the first rotation axis on the base. A swing arm and a second driving device, which is capable of driving the swing arm to swing around the second rotation axis on the rocker arm, are provided on the rocker arm. A workbench and a third driving device for driving the workbench to rotate around the third rotation axis are provided on the swing arm. The second rotation axis and the third rotation axis are parallel to each other or on different planes. Compared with the existing double rotating shaft turntable, the multi-axis turntable of the present invention has a cutting tool system of good and stable rigidity.

Abstract: This disclosure generally relates to power generation methods and systems based on gas turbine engines, and particularly to mobile and adaptive power generation systems and methods based on gas turbine engine for supplying mechanical and/or electrical power for fracturing operations at an oil wellsite. Various systems, platforms, components, devices, and methods are provided for flexibly and adaptively configure one of more gas turbines, hydraulic pumps, and electric generators to support both fracturing and electric demands at a well site. The disclosed implementations enable and facilitate a mobile, adaptive, and reconfigurable power system to provide both mechanical and electric power for hydraulic fracturing operation.

Abstract: A method, performed by a first terminal in a video call process between the first terminal and a second terminal, includes sending an image including a target device to a server, receiving device information corresponding to the target device sent by the server, virtualizing an operation interface based on the received device information, and displaying the operation interface on a current video call screen, where the operation interface is an operation interface of a control panel or a remote control of the target device, and displaying, on the current video call screen based on data from the second terminal, one or more operations performed on the operation interface by a user of the second terminal on the second terminal.

Abstract: The present invention discloses a multi-degree-of-freedom numerical control turntable including: a B-shaft rotating assembly; a C1-shaft workbench swing assembly; a C2-shaft workbench rotating assembly; and an S-shaft workbench movement assembly. The B-shaft rotating assembly includes a rotating connection land and a B-shaft power control mechanism; the C2-shaft workbench rotating assembly includes a movement base, a workbench and a C2-shaft power control mechanism; the S-shaft workbench movement assembly includes a swing base and an S-shaft power control mechanism; and the C1-shaft workbench swing assembly includes a swing arm and a C1-shaft power control mechanism, with the C1-shaft line intersecting the B-shaft line. The S-shaft power control mechanism can drive the movement base to move along an S-shaft line on the swing base to cause a region to be machined of a workpiece to approach the intersection point of the C1-shaft line and the B-shaft line.

Abstract: A power generation apparatus and a power system are provided. The power generation apparatus includes a first transportation means, a gas turbine and a generator, the first transportation means has a first platform, a first housing is provided on the first platform, the gas turbine is arranged in the first housing and has a first input terminal and a first output terminal, the generator is arranged in the first housing and has a second input terminal and a second output terminal, the first output terminal is connected with the second input terminal.

Abstract: Provided is a preparation method for a DNA library, comprising a pre-library preparation process, the pre-library preparation process comprising DNA preparation, end repair and 3? A-tailing, linker connection using an anti-contamination linker, linker connected product purification, pre-library amplification, and amplified pre-library purification. Also provided are a use of the anti-contamination linker in preparing a test kit for DNA library capture, and a method for performing bioinformatic analysis on the DNA library prepared by means of the preparation method of the present invention. The preparation method of the present invention reduces the risk of cross-contamination between samples.

Abstract: A power device for an electric tool and system is provided that can power tool bodies of different electric tools. The power device includes a power control unit that receives a control instruction transmitted by the tool control unit and controls the motor according to control instructions. The power device not only improves the utilization rate of general modules, such as a motor and a battery pack, but also improves the expandability of the system, reduces the amount of programs in the power device, and eliminates the need to update the programs in the power device to be adapted to a new working body.