Abstract: The present invention relates to a pump unit applied to a high-pressure cleaning machine, including: a water inlet chamber, a water outlet chamber, and a central chamber connected to the water inlet chamber and the water outlet chamber. The pump unit further includes a plunger disposed in the central chamber and an eccentric mechanism connected to the plunger. The eccentric mechanism drives the plunger to perform reciprocating motion in the central chamber.

Abstract: The disclosure provides a light bar, a backlight module and a display device. The light bar includes a plurality of lamp beads, wherein each of the lamp beads is a dual-crystal lamp with two light-emitting crystals.

Abstract: The disclosure discloses a method to elevate the amount of steviol glycosides remained in the recrystallization mother liquor of Stevia extract, and belongs to the field of modification and extraction of natural compounds. The disclosure adopts lactase for highly specific catalytic hydrolysis of stevioside to convert stevioside into rubusoside which usually can only be obtained from leaves of Rubus suavissimus S. Lee; and meanwhile, after stevioside in the mother liquor glycosides is converted, since the polarity difference between rubusoside and rebaudioside A is far larger than the polarity difference between stevioside and rebaudioside A, rebaudioside A is more easily separated out of the mother liquor glycosides. A technology provided by the disclosure is also applicable to value increment of mixed steviol glycosides containing stevioside and is beneficial for separating out rebaudioside A from the mixed steviol glycosides.

Abstract: The present disclosure discloses the preparation and application of magnetic metallic oxide cross-linked acidic polyionic liquid, belonging to the technical field of solid acid catalysis. The catalyst prepared by the present disclosure has good Lewis acid site and Brönsted acid site, and has the characteristics of high speed, high efficiency, environment friendliness and the like when catalyzing preparation of furfural from xylose. The catalyst has the advantages of easy separation, multiple cycles of recycling and the like, and is green and pollution-free. The magnetic metal oxide cross-linked acidic polyionic liquid prepared by using the present disclosure has the characteristics of high speed, high efficiency, environment friendliness and the like when catalyzing preparation of furfural from xylose, and meanwhile, the catalyst has the advantages of easy separation, multiple cycles of recycling and the like, and is green and pollution-free.

Abstract: An antenna assembly may include an excitation source configured to generate an excitation signal, an antenna radiator including a first end and an opposing second end, a reference ground disposed corresponding to the antenna radiator, adjacent to the first end and including a first surface adjacent to the first end and an opposing second surface adjacent to the second end, a support body arranged on the second surface of the reference ground and extending along a direction from the first end to the second end, and a conductive sheet arranged on the support body, adjacent and coupled to the second end and configured to transmit the excitation signal from the excitation source to the antenna radiator, the antenna radiator may be configured to generate an electromagnetic signal according to the excitation signal.

Abstract: The present application discloses a pipeline radar and television inspection robot which includes a robot body, a directional drilling lifting device, a directional drilling rotary device, a directional drilling swing device, a radar, cameras and a driving apparatus; wherein the directional drilling lifting device is on a front part of the robot body; the directional drilling rotary device is on the directional drilling lifting device; the directional drilling swing device is on the directional drilling rotary device; the radar and the cameras are on the directional drilling swing device; the driving apparatus are on a bottom of the robot body. The directional drilling lifting device, the radar and the cameras are plugged in the robot body. The robot body electrically connects to cables which electrically connect to a control system. The cameras and the radar are able to be adjusted and the components are connected as modules.

Abstract: A method for TDMA slot synchronization and calibration of a master and a slave includes: receiving a synchronizing frame from the master by the slave, wherein the synchronizing frame includes a first count value of a timing counter of the master; analysing the synchronizing frame by the slave to acquire the first count value; and adjusting a TDMA slot of the slave according to the first count value and a second count value of a timing counter of the slave to synchronize the TDMA slot of the slave with a TDMA slot of the master.

Abstract: A power module and a power device having the power module are disclosed. The power device includes a main board. The power module is inserted in the main board and includes a PCB, a magnetic element, a primary winding circuit and at least one secondary winding circuit. The magnetic element is provided on the PCB and includes a core structure, a primary winding and at least one secondary winding. The core structure has a first side and a second side opposite to each other, and a third side and a fourth side opposite to each other. The primary winding circuit is provided on the PCB and positioned in the vicinity of the first or second side of the core structure. The secondary winding circuit is provided on the PCB and positioned in the vicinity of the third or fourth side of the core structure.

Abstract: The present disclosure provides a method for controlling frequency hopping, a transmitter and a receiver, the method comprising: switching a synchronization frequency to any pre-configured synchronization frequency value when a time slot for sending a synchronization frame is reached, and sending the synchronization frame; after the previous synchronization frame is sent, switching the synchronization frequency from the previous pre-configured synchronization frequency value to any pre-configured synchronization frequency value, and sending the synchronization frame; after a total time slot for sending a synchronization frame is complete, switching a data frequency to any pre-configured data frequency value, and sending the data frame when the time slot for sending a data frame is reached; or, receiving a data frame when a time slot for receiving a data frame is reached; after the previous data frame is sent or received, and sending a data frame, switching the data frequency from a previous pre-configured dat

Abstract: The present disclosure provides a method and device for frequency hopping synchronization, a receiver, and a transmitter.

Abstract: An electronic device is provided. The electronic device includes a metal frame, a circuit board, a first connection structure, and an antenna module. The metal frame is provided with a first contact portion extending outwardly from an inner surface of the metal frame. The first connection structure includes a first resilient piece, the first resilient piece has a first end and a second end opposite to the first end, the first end of the resilient piece is electrically coupled with the first contact portion via abutting against the first contact portion. The antenna module disposed on the circuit board is electrically coupled with the second end of the first resilient piece extending through the circuit board, and is electrically coupled with the metal frame via the first resilient piece, such that the metal frame is operable to be antenna resonating elements of the antenna module.

Abstract: The present disclosure provides a method for controlling frequency hopping, a transmitter and a receiver, the method comprising: switching a synchronization frequency to any pre-configured synchronization frequency value when a time slot for sending a synchronization frame is reached, and sending the synchronization frame; after the previous synchronization frame is sent, switching the synchronization frequency from the previous pre-configured synchronization frequency value to any pre-configured synchronization frequency value, and sending the synchronization frame; after a total time slot for sending a synchronization frame is complete, switching a data frequency to any pre-configured data frequency value, and sending the data frame when the time slot for sending a data frame is reached; or, receiving a data frame when a time slot for receiving a data frame is reached; after the previous data frame is sent or received, and sending a data frame, switching the data frequency from a previous pre-configured dat

Abstract: The present disclosure discloses an immobilized metalloporphyrin catalyst and its utilization in maleic acid preparation, belonging to the technical field of metalloporphyrin catalytic application. The immobilized metalloporphyrin catalyst is used for catalyzing furfural to prepare maleic acid and is good in catalytic effect, mild in reaction conditions and capable of greatly reducing the energy consumption required in the prior art. The catalyst disclosed by the present disclosure can provide a good microenvironment for a reaction, so that the yield and selectivity of maleic acid are increased; and according to a method disclosed by the present disclosure, the conversion ratio of furfural is 20.4%-95.6%, the yield of maleic acid is 10%-56.1%, and the selectivity is 43.6%-76.1%. Meanwhile, the catalyst is easy to separate and environmentally friendly and may be recycled for many times.

Abstract: The present disclosure discloses an immobilized metalloporphyrin catalyst and its utilization in maleic acid preparation, belonging to the technical field of metalloporphyrin catalytic application. The immobilized metalloporphyrin catalyst is used for catalyzing furfural to prepare maleic acid and is good in catalytic effect, mild in reaction conditions and capable of greatly reducing the energy consumption required in the prior art. The catalyst disclosed by the present disclosure can provide a good microenvironment for a reaction, so that the yield and selectivity of maleic acid are increased; and according to a method disclosed by the present disclosure, the conversion ratio of furfural is 20.4%-95.6%, the yield of maleic acid is 10%-56.1%, and the selectivity is 43.6%-76.1%. Meanwhile, the catalyst is easy to separate and environmentally friendly and may be recycled for many times.

Abstract: Disclosed are a method and a device for downloading a file. The method includes: when receiving a download request of a file, acquiring attribute information about the file, and learning information about the length of the file according to the attribute information about the file; when the length of the file goes beyond a preset value, segmenting the download request into at least two fragments of download requests; sending the at least two fragments of download requests to at least two data nodes to request to download corresponding fragments, and obtaining the at least two fragments; and according to the at least two fragments obtained by download, obtaining the file. By segmenting the download request into a plurality of fragments of requests, the present invention achieves the parallel download of the plurality of fragments of requests, thereby greatly improving the download efficiency of a file.

Abstract: Disclosed are 1-(arylmethyl)quinazoline-2,4(1H,3H)-diones represented by the Formula (I): wherein Ar, R1-R6 are defined herein. Compounds having Formula (I) are PARP inhibitors. Therefore, compounds of the invention may be used to treat clinical conditions that are responsive to the inhibition of PARP activity.

Abstract: The present disclosure relates to 2-arylamino pyridine, pyrimidine, or triazine derivatives, and the preparation method and use thereof. The 2-arylamino pyridine, pyrimidine, or triazine derivatives may act on certain mutated forms of epidermal growth factor receptor, for example the L858R activating mutant, the delE746_A750 mutant, the Exonl9 deletion activating mutant, and the T790M resistance mutant, so as to be used for treatment and prevention of diseases and medical conditions. The 2-arylamino pyridine, pyrimidine, or triazine derivatives may be used for treatment and prevention of cancer. The present disclosure also relates to a pharmaceutical composition comprising 2-arylamino pyridine, pyrimidine, or triazine derivatives, intermediates useful in the manufacture of 2-arylamino pyridine, pyrimidine, or triazine derivatives, and to methods of treatment of diseases mediated by various different forms of EGFR using 2-arylamino pyridine, pyrimidine, or triazine derivatives.

Abstract: The present disclosure discloses the preparation and application of magnetic metallic oxide cross-linked acidic polyionic liquid, belonging to the technical field of solid acid catalysis. The catalyst prepared by the present disclosure has good Lewis acid site and Brönsted acid site, and has the characteristics of high speed, high efficiency, environment friendliness and the like when catalyzing preparation of furfural from xylose. The catalyst has the advantages of easy separation, multiple cycles of recycling and the like, and is green and pollution-free. The magnetic metal oxide cross-linked acidic polyionic liquid prepared by using the present disclosure has the characteristics of high speed, high efficiency, environment friendliness and the like when catalyzing preparation of furfural from xylose, and meanwhile, the catalyst has the advantages of easy separation, multiple cycles of recycling and the like, and is green and pollution-free.

Abstract: An electronic device is provided. The electronic device includes a metal frame, a circuit board, a first connection structure, and an antenna module. The metal frame is provided with a first contact portion extending outwardly from an inner surface of the metal frame. The first connection structure includes a first resilient piece, the first resilient piece has a first end and a second end opposite to the first end, the first end of the resilient piece is electrically coupled with the first contact portion via abutting against the first contact portion. The antenna module disposed on the circuit board is electrically coupled with the second end of the first resilient piece extending through the circuit board, and is electrically coupled with the metal frame via the first resilient piece, such that the metal frame is operable to be antenna resonating elements of the antenna module.

Abstract: An antenna apparatus and an electronic device are provided. The antenna apparatus includes an antenna radiator, a support member, and a first extension portion. The antenna radiator includes a radiator body and a power feeding portion. The radiator body includes a first end and a second end. The power feeding portion is disposed at the first end and configured to receive an excitation signal. The support member includes a first surface, a second surface opposite to the second surface, and a side surface disposed between the first surface and the second surface and adjacent to the radiator body. The first extension portion is located adjacent to the second end and electrically connected to the support member through the side surface. The first extension portion, the side surface, and the antenna radiator cooperatively define a gap region constituting at least part of a clearance area of the antenna radiator.