Abstract: The disclosure discloses a global pressure acquisition system for a rotating model, including a CCD camera, a signal generator, a stroboscopic pulse LED light source, a photoelectric sensor, a preset counter, and a controller. The disclosure further discloses a global pressure acquisition method for a rotating model. The disclosure has the beneficial effects that, by using the non-contact measuring method disclosed by the present disclosure, a measured model and a flow field are not damaged, a submillimeter-level spatial resolution is achieved, it is ensured that the acquired PSP image of the rotating model is clear, and the signal to noise ratio of the image is increased.

Abstract: Surface pressure measurements on rotating models are important for flow phenomenon identification, understanding flow mechanisms and model aerodynamic design. The disclosure discloses a periodic pressure field measurement system based on the superposed lifetime of pressure sensitive paint, including pressure sensitive paint, a pulse light source, a camera, a synchronizer and a computer. A lifetime superposition method is disclosed in the disclosure for measuring periodic pressure fields of pressure sensitive paint.

Abstract: A discrete semiconductor packaging structure and associated methods thereof. The structure includes a housing, a chip assembly pad being encapsulated by the housing, where the chip assembly pad is configured for coupling to a semiconductor chip. The structure further includes one or more leads, at least partially encapsulated by the housing, a clip including one or more terminals and a chip linker, where the terminals being configured for coupling to one or more leads, and a heat dissipation block, where the chip linker being coupled between the semiconductor chip and the heat dissipation block. The heat dissipation block is configured for removing heat from the semiconductor chip during operation.

Abstract: This application provides a signal transmission method and apparatus, applied to automatic driving, assisted driving, and the like. The method includes: A first device generates a first signal, where the first signal includes a first part and a second part, the second part is modulated in a phase shift keying PSK modulation scheme, the second part is encoded by using polar code, the first part is used to transmit a preconfigured sequence, a predefined sequence, or a sequence generated according to a predefined rule, and the second part is used to transmit control information. The first device sends the first signal to a second device. The second device obtains the control information. The PSK modulation scheme can improve sensitivity of a signal receive end, and improve anti-noise and anti-interference capabilities. In addition, the second part is encoded by using the polar code, which can improve anti-noise and anti-interference performance.

Abstract: A semiconductor package structure and a manufacturing method therefor are disclosed. The semiconductor package structure includes a package layer, a first device layer, a first insulation layer, a conductive copper pillar, and a second device layer. The package layer covers the first device layer. The first device layer, the first insulation layer, and the second device layer are sequentially stacked. The conductive copper pillar extends through the first insulation layer. The first device layer and the second device layer are electrically connected through the conductive copper pillar. The first device layer includes a first circuit layer, a trench, and an embedded device. The embedded device is connected to the first circuit layer. The trench is arranged below the embedded device. The trench is partially or completely overlapped with a projection of the embedded device in a mounting direction of the embedded device.

Abstract: Provided is a method for treating an oil gas, which can realize high-efficiency separation for and recovery of gasoline components, C2, C3, and C4 components. The method first conducts separation of light hydrocarbon components from gasoline components, and then performs subsequent treatment on a stream rich in the light hydrocarbon components, during which it is no longer necessary to use gasoline to circularly absorb liquefied gas components, which significantly reduces the amount of gasoline to be circulated and reduces energy consumption throughout the separation process. Besides, in this method, impurities, such as H2S and mercaptans, in the stream rich in the light hydrocarbon components are removed first before the separation for the components. This ensures that impurities will not be carried to a downstream light hydrocarbon recovery section, thus avoiding corrosion issues caused by hydrogen sulfide in the light hydrocarbon recovery section.

Abstract: Embodiments of the present disclosure relate to a method, system and computer program product for semantic search based on a graph database. In some embodiments, a method is disclosed. According to the method, the user jobs of a user are obtained from a first software product. Based on the user jobs, target test cases are selected from a plurality of test cases associated with the first software product and a second software product. The target test cases are applied to the first software product and the second software product, and in accordance with a determination that a result of applying the target test cases satisfies a predetermined criterion, an instruction is provided to indicate migrating from the first software product to the second software product. In other embodiments, a system and a computer program product are disclosed.

Abstract: This application provides an access method and a communication apparatus, applied to the communication field, and in particular, to the field of short-range communication. The access method includes: sending first broadcast information based on a target access mode, where the first broadcast information indicates that a broadcast type is connectable; and if a first access request from a first device is received within first preset duration, sending first response information for the first access request, where the target access mode is an access mode in an access mode set, and the access mode set includes at least two access modes. Through configuration of the at least two access modes, access modes can be selected in different scenarios, to shorten time for subsequently establishing a connection between the first device and a second device, reduce power consumption of the first device or the second device.

Abstract: A non-invasive time domain reflection probe calibration method includes: using different volume ratio of ethanol and deionized water mixed solution to calculate a test target's medium weight coefficient and waveguide length of the non-invasive time domain reflection probes; using different concentrations of NaCl solutions to calibrate a waveguide geometric dimensioning of the non-invasive time domain reflection probes; preparing compacted soil samples with known different moisture contents and densities, and calibrating a correlation parameter of compacted soil samples' dielectric constant and conductivity with moisture content and density. The method not only determines the sensitivity of the test target medium of the non-invasive time domain reflection probes, but also obtains the waveguide length and geometric dimensioning of the probe, and realizes an accurate test of moisture content and density of the soil.

Abstract: Embodiments of the present disclosure provide a music playing method and device, where the method includes: receiving a first operation instruction in a first application with a function of video playing; and invoking a music player to play music in the first application in response to the first operation instruction. According to the embodiments of the present disclosure, music can be played in a first application through a first operation instruction of a user, avoiding that the user exits from the first application and then enters the music application to play music, and reducing an operation complexity of the user.

Abstract: Provided are an organic compound, an electroluminescent material and an application thereof. The organic compound has a structure represented by Formula I. With the design of the spiro parent structure and the introduction of specific substituents, the organic compound can prevent materials from stacking and reduce the crystallinity of the molecule. The design of the spiro structure and substituents make the organic material have a high triplet state energy level Ti, and the nitrogen heterocycle and its linking groups make the organic compound have characteristics of good electron and hole transport performances. The organic compound has suitable HOMO and LUMO energy levels, facilitating the coordination of adjacent layers in terms of energy level. The organic compound also has advantages of high glass-transition temperature and good molecular thermal stability. Therefore, the organic compound can effectively improve the light emitting efficiency and lifetime of the device.

Abstract: A method and system of positive and negative sequence rotor currents control for DFIG-WTs under a single dq-PI control structure includes: adjusting the negative sequence rotor current reference according to the negative sequence stator terminal voltage to obtain a reference adjustment value; converting the reference adjustment value to the forward-rotating dq coordinate system and superimposing it with the positive sequence rotor current reference as the input of a PI-regulator-based current feedback controller to uniformly control the positive and negative sequence rotor current; determining the output voltage reference of the rotor-side converter by the PI-regulator-based current feedback controller, according to which, the switching signal of the rotor-side converter can be determined through the SPWM function, controlling the turn-on and turn-off of the bridge arms of the rotor-side converter to form the output voltage.

Abstract: A water environment temperature measurement tool includes measurement boxes and a counterweight box; a plurality of groups of the measurement boxes are provided; the counterweight box is movably connected with a group of measurement boxes; and each measurement box is provided with a temperature measurement instrument inside. The water environment temperature measurement tool further comprises: control mechanisms, each comprising a water inlet pipe, a water retaining member, an elastic member, a control assembly, a rotating seat, a rotating shaft, a second screw rod, a control seat and a rotary assembly. In the water environment temperature measurement tool of the present invention, the control mechanisms can achieve extraction and temperature measurement of water at different water body depths by cooperating with the measurement boxes and the temperature measurement instruments.

Abstract: Techniques for snapshot classification involve generating a plurality of snapshots of a storage system at multiple times; clustering the plurality of snapshots into a first group of snapshots and a second group of snapshots based on data features of the plurality of snapshots; and determining a clean snapshot among the plurality of snapshots based on a comparison between the generation time of the first group of snapshots and the generation time of the second group of snapshots. Accordingly, a clean snapshot and a damaged snapshot can be automatically and quickly distinguished, thereby improving the efficiency of finding a clean snapshot and helping a user recover data quickly.

Abstract: A surface mounting apparatus, structure, and associated methods thereof. The surface mounting apparatus includes a housing, a lead frame, at least partially encapsulated by the housing. The lead frame includes a chip mounting surface having a chip mounting pad, and one or more first stress relief features disposed outside of the chip mounting surface. The apparatus further includes another lead frame, at least partially encapsulated by the housing.

Abstract: A data processing method includes: generating a service serial number for a target service according to a preset naming rule; obtaining service data of the target service; obtaining a target data table from a plurality of pre-configured data tables, according to the service serial number; and storing the service data to the target data table.

Abstract: Embodiments of this application disclose a board, an optical module, a media access control (MAC) chip, a digital signal processor (DSP), and an information processing method. The board in the embodiments of this application includes a MAC chip, a DSP, and an equalizer. The MAC chip is configured to send first information to the DSP at an optical network unit (ONU) online stage, where the first information includes a first ONU identifier. The DSP is configured to receive the first information, and determine a first reference equalization parameter, where the first reference equalization parameter is related to the first ONU identifier. The DSP is further configured to set an equalization parameter of the equalizer to the first reference equalization parameter.

Abstract: The disclosure belongs to the technical field of synthetic adhesives, and discloses a bionic wet surface adhesion promoter and the preparation thereof, and a room temperature curable silicone sealant composition and the preparation thereof. A method for preparing a bionic wet surface adhesion promoter includes: reacting polyvinylpyrrolidone with 2-chloro-3?,4?-dihydroxyacetophenon; purifying the product obtained in the reaction step using n-hexane; drying the product obtained in the purification step using a vacuum drying process; and grinding the product obtained in the drying step into powder using a ball milling process; wherein the mass ratio of polyvinylpyrrolidone to 2-chloro-3?,4?-dihydroxyacetophenon is (0.8˜1.2):1.

Abstract: The present invention relates to the field of water surface treatment, and in particular to a cleaning ship for water surface treatment for harvesting water plants. In order to solve the technical problems that the existing cleaning ship cannot adapt to the waters of different depths for harvesting water plants, and a hull has low load utilization rate for the collected water plants and affects the overall working efficiency and the fuel economy of the hull, the present invention provides a cleaning ship for water surface treatment for harvesting water plants, comprising a steel belt conveying mechanism, a driven shaft and the like. The steel belt conveying mechanism drives the driven shaft to rotate.

Abstract: At least one processor identifies dependency relationships among libraries in a repository of libraries. Using the dependency relationships among libraries, at least one machine learning model can be created that predicts with a confidence value a dependency between a given library and a target library. An L layer tree-like graph can be created, using the dependency relationships among libraries and an application package. L can be configurable. Versions of the libraries to use can be determined by running the at least one machine learning model for each pair of nodes having a dependency relationship in the L layer tree-like graph, the at least one machine learning model identifying the dependency relationship with a confidence value, where pairs of nodes having largest confidence values are selected as the versions of the libraries to use in the application package.