Abstract: An Android penetration method and device for implementing silent installation based on accessibility services. The method includes: acquiring a second target application by adding a load program to a first target application and adding penetration permissions using an Android decompilation technology; and implementing silent installation of the second target application using an accessibility service technology.

Abstract: Disclosed are a Nested Named Entity Recognition method based on part-of-speech awareness, system, device and storage medium therefor. The method uses a BiLSTM model to extract a feature of text word data in order to obtain a text word depth feature, and each text word of text to be recognized is initialized into a corresponding graph node, and a text heterogeneous graph of the text to be recognized is constructed according to a preset part-of-speech path, the text word data of the graph nodes is updated by an attention mechanism, and the features of all graph nodes of the text heterogeneous graph are extracted using the BiLSTM model, and a nested named entity recognition result is obtained after decoding and annotating. The present disclosure can recognize ordinary entities and nested entities accurately and effectively, and enhance the performance and advantages of the nested named entity recognition model.

Abstract: A drilling tool includes an outer cylinder; a power rotary shaft arranged in an inner chamber of the outer cylinder; a percussion generator arranged below the power rotary shaft, having a transmission shaft extending in the outer cylinder and can be driven by the power rotary shaft to rotate around its axis, an output main shaft engaged with a lower end of the transmission shaft so as to be driven by the transmission shaft to rotate about its axis and is movable relative to the transmission shaft along an axial direction, and an percussion assembly The percussion assembly is arranged between an annulus formed between the upper end of the output main shaft and the outer cylinder and can generate reciprocating impact along the axial direction on the output main shaft. A drilling bit connected with the output main shaft extending out of the inner chamber of the outer cylinder.

Abstract: The present disclosure relates to the technical field of Internet, in particular to a method for measuring network international outlet interfaces of a designated area. The method includes the following steps: acquiring a designated collection of routing interface paths and area location information of IP addresses of routing interface nodes; dividing the collected routing interface paths into critical hop complete paths and critical hop missing paths; determining whether a routing interface path is a critical hop complete path; using a 2-tuple to identify network international outlet interfaces of the routing interface path; and counting the quantity of the network international outlet interfaces of the measured area.

Abstract: This application provides a narrowband interference isolation method and a communication apparatus. An example method includes: determining a parameter of a narrowband interference signal; determining a coefficient of a first filter based on the parameter of the narrowband interference signal, wherein the first filter is located at a receive end of a master communication device, and the coefficient of the first filter is for filtering out the narrowband interference signal; and sending the parameter of the narrowband interference signal or the coefficient of the first filter to M slave communication devices using an Ethernet operation, administration, and maintenance (OAM) frame, wherein the master communication device is connected to the M slave communication devices, M?1, and M is an integer.

Abstract: A speed-enhancing drilling tool includes an upstream drill string (10), which has a drive motor and a first driving rod coupled therewith, a downstream drilling bit; and a percussive device connected between the upstream drilling string and the downstream drilling bit. The first driving rod extending axially and the drive motor are configured to drive the first driving rod in rotation. The percussive device has a rotary driving part having an upper end engaged with the first driving rod to rotate together therewith; and a rotary working part having an upper end engaged with a lower end of the rotary driving part and a lower end connected with the downstream drilling bit. The rotary working part can be driven by the rotary driving part to rotate about its axis, and axially movable relative thereto; and a percussion generating part arranged around the rotary working part.

Abstract: To provide a vacuum pump capable of efficiently cooling electrical equipment. The vacuum pump comprises a pump main body, and an electrical equipment case disposed outside the pump main body, wherein the electrical equipment case includes a cooling jacket in which a cooling medium flow passage is formed, and a power supply circuit portion that has a circuit component and can be cooled by the cooling jacket, the power supply circuit portion being attached to the cooling jacket so that heat from the electrical component portion can be transferred, and the cooling jacket includes a jacket main body and a cooling pipe for circulating cooling water in the jacket main body, and partially exposes the cooling pipe toward the power supply circuit portion.

Abstract: A communication method includes: a first device obtains a communication rate of a second device and obtains asymmetric rate transmission capability information supported by the second device. The first device determines, based on asymmetric rate transmission capability information supported by the first device, the asymmetric rate transmission capability information supported by the second device, a first communication rate of the first device, and the second communication rate, a first asymmetric rate transmission capability supported by both the first device and the second device.

Abstract: An echo cancellation method and a transceiver to reduce dependence of a system on an enob of a DAC, and improve performance of echo cancellation. The transceiver includes an echo cancellation apparatus, a transmit link, a receive link, and a hybrid circuit. The transmit link and the receive link are coupled to a transmission line by using the hybrid circuit. The echo cancellation apparatus includes a first signal converter, a slicer, a first subtractor, a second digital-to-analog converter, a second subtractor, and a third subtractor.

Abstract: This application provides a narrowband interference isolation method and a communication apparatus. An example method includes: determining a parameter of a narrowband interference signal; determining a coefficient of a first filter based on the parameter of the narrowband interference signal, wherein the first filter is located at a receive end of a master communication device, and the coefficient of the first filter is for filtering out the narrowband interference signal; and sending the parameter of the narrowband interference signal or the coefficient of the first filter to M slave communication devices using an Ethernet operation, administration, and maintenance (OAM) frame, wherein the master communication device is connected to the M slave communication devices, M?1, and M is an integer.

Abstract: A SnBiSb series low-temperature lead-free solder and a preparation method thereof, which belongs to the technical field of low-temperature soldering. The lead-free solder includes by weight the following composition: 32.8-56.5% of Bi, 0.7-2.2% of Sb, with the remainder being Sn, wherein the weight percentages of Bi and Sb satisfy a relationship of b=0.006a2?0.672a+19.61+c, wherein the symbol a represents the weight percentage of Bi, the symbol b represents the weight percentage of Sb, and the range of c is ?1.85?c?1.85. The solder alloy has a peritectic or near peritectic structure with a low melting point, and has an excellent mechanical performance and reliability, and applicable to the field of low-temperature soldering.

Abstract: To provide a vacuum pump capable of efficiently cooling electrical equipment. The vacuum pump includes a pump main body and an electrical equipment case disposed outside the pump main body, wherein the electrical equipment case includes a cooling jacket which has an inner surface and an outer surface in a vertical portion and in which a cooling medium flow passage is formed, and a plurality of electrical equipment that have circuit components and can be cooled by the cooling jacket. The inner surface and the outer surface are formed facing different directions, and the electrical equipment portions are attached respectively to the inner surface and the outer surface so that heat can be transferred.

Abstract: Provided is a vacuum pump apparatus which allows reductions in thickness, weight, size, and cost of a vacuum pump control device. In the vacuum pump apparatus, a pump main body unit and a control unit which controls driving of the pump main body unit are integrated with each other. The vacuum pump apparatus has a configuration in which a spacer configured to support a load applied to a housing of the control unit is provided between a base of the pump main body unit and the housing of the control unit.

Abstract: A vacuum pump includes a regenerative resistor removed from the control apparatus and disposed in the vacuum pump. More specifically, the regenerative resistor is detached from a control board (control apparatus) on which a control circuit is mounted, and disposed in a base of the vacuum pump, and connected to the control board via a wire. Further, a gap is provided between the base of the vacuum pump and the control apparatus. Moreover, a cover (outer covering body) is provided in the regenerative resistor disposed in the base part of the vacuum pump and the wire part. Since the regenerative resistor is provided in the base of the vacuum pump, which has a large heat capacity, a temperature increase of the control apparatus is reduced.

Abstract: Embodiments of the present invention provides an Android penetration method and device for implementing silent installation based on accessibility services. The method includes: acquiring a second target application by adding a load program to a first target application and adding penetration permissions using an Android decompilation technology; and implementing silent installation of the second target application using an accessibility service technology. The embodiment of the present invention enables a terminal to perform silent penetration test without root and user interaction. The embodiments of the present invention can also improve the stability of the penetration session.

Abstract: A vacuum pump, and a waterproof structure and a control apparatus applied to the vacuum pump which improve efficiency of on-site maintenance work and prevent water from penetrating into a connector connecting portion when a cover is removed during circuit separation or the like. When performing maintenance work, after a chassis of a control apparatus is lowered by around several tens of millimeters, the chassis of the control apparatus is pulled out in a radial direction of a pump. Accordingly, a pump main body and the control apparatus can be readily attached and detached even when sufficient empty space is not available in an axial direction of the vacuum pump. A wall portion is circumferentially protrusively provided in side portions of the base portion and the control apparatus. Furthermore, a sealing member and a lid are inserted into a gap. Therefore, water droplets cannot easily penetrate into the gap.

Abstract: A method for transmitting upstream data in a cable network is provided. The method includes a cable modem (CM) receiving a generic service identifier (G-SID) included in a corresponding information element (IE) in a data over cable service interface specification (DOCSIS) upstream bandwidth allocation MAP message. The G-SID is a unique identifier assigned to the CM. The method includes the CM transmitting the upstream data for one or more service flows of the CM via at least a portion of the CM bandwidth allocation.

Abstract: A vacuum pump has a hermetic connector disposed on a base of a body of the vacuum pump. The hermetic connector has a plurality of pins connected to a plurality of electrical cables leading to the inside of the pump body. The connector is longer in a lateral direction than in an axial direction so that the connector is horizontally long in a circumferential direction of the pump body.

Abstract: A cable media converter (CMC) management method, including receiving, by a CMC controller by using a management channel, a second message packet sent by a CMC, where the second message packet has an identifier of the CMC and configuration file information of a cable modem (CM), and where the identifier of the CMC uniquely identifies the CMC, and determining, by the CMC controller according to a locally saved correspondence between an optical line terminal (OLT) and a CMC, an OLT corresponding to the CMC identified by the identifier in the second message packet, and sending the configuration file information in the second message packet to the determined OLT.

Abstract: To provide a vacuum pump capable of efficiently cooling electrical equipment. The vacuum pump includes a pump main body and an electrical equipment case disposed outside the pump main body, wherein the electrical equipment case includes a cooling jacket which has an inner surface and an outer surface in a vertical portion and in which a cooling medium flow passage is formed, and a plurality of electrical equipment that have circuit components and can be cooled by the cooling jacket. The inner surface and the outer surface are formed facing different directions, and the electrical equipment portions are attached respectively to the inner surface and the outer surface so that heat can be transferred.