Abstract: Methods, apparatus, and systems that relate to rate matching scheme design for polar coding, PAC coding, or other pre-transformed polar coding are described. One example method includes determining, by a first node, an output bit sequence having E bits based on an input bit sequence having K bits, wherein the output bit sequence is determined by 1) performing a polar transform with H components and 2) performing either no pre-transform or at least two pre-transform operations; wherein the polar transform is based on H polar matrices G(N0), G(N1), . . . , G(NH?1), wherein H, K and E are integers greater than 1, wherein a polar matrix G(Ni) is of size Ni. The method also includes transmitting, by the first node, a signal including the output bit sequence to a second node.

Abstract: An apparatus with a first branch and a second branch that is configured to receive a first signal and a second signal from a same device, where the second signal indicates the apparatus to enter a connected state. The first branch includes a first frequency-amplitude converter configured to obtain first amplitude information of a third signal which is obtained by performing frequency mixing on the first signal and a first local oscillator signal. The second branch is configured to demodulate a fourth signal which is obtained by performing frequency mixing on the second signal and a second local oscillator signal which is obtained by performing frequency offset correction on the first local oscillator signal based on the first amplitude information, the second branch includes a second frequency-amplitude converter, and a linear working interval of the second frequency-amplitude converter is smaller than that of the first frequency-amplitude converter.

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may include a first set of antenna arrays disposed in a first shape and a receiving device may include a second set of antenna arrays disposed in a second shape. A first axis that intersects an antenna array of the first set of antenna arrays and a centroid of the first shape may be offset from a vertical direction by a first angular offset. A second axis that intersects an antenna array of the second set of antenna arrays and a centroid of the second shape may be offset from the vertical direction by a second angular offset that is different than the first angular offset. The transmitting device may transmit signaling to the receiving device using the first and second sets of antenna arrays, respectively based on difference between the first and second angular offsets.

Abstract: A device for simulating high-frequency current propagation of partial discharge of a GIL/GIS is disclosed. The device comprises a casing, a busbar cavity, an adjustable impedor, a first metal support, a second metal support, a third metal support, and a high-frequency current sensor. The first metal support and the second metal support are separated by an insulating support, the third metal support has an end connected to the second metal support, as well as an end connected to a grounding grid, and the adjustable impedor is formed by an adjustable resistor and an adjustable inductor which are connected in series, and is connected in series between the first metal support and the second metal support through a wire.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a position estimation entity determines a set of position estimates associated with a set of user equipments (UEs), obtains first measurement information associated with a set of signals as reflected off of a target intelligent reflecting surface (IRS), determines a position estimate of the target IRS based on the set of position estimates and the first measurement information, and determines an orientation, relative to a common orientation reference frame, of the target IRS based on the set of position estimates and at least the first measurement information.

Abstract: The present invention provides a MEMS speaker including a substrate sidewall enclosing a cavity. The substrate sidewall includes a first surface and a second surface, a sounding assembly that is arranged on the first surface of the substrate sidewall and also seals the cavity at the opening of the first surface, and a bracket disposed in the cavity. The sounding assembly includes a first sounding assembly and the second sounding assembly. Each sounding assembly includes a driving part and a flexible diaphragm. The flexible diaphragm closes the gap formed between the free ends of adjacent driving parts and between the free ends of the driving parts and the substrate sidewall. The present invention also provides a manufacturing method of MEMS speaker. The MEMS speakers provided by the present invention have high-quality acoustic performance.

Abstract: The disclosure provides a security analysis method and system based on protocol state, which relates to the technical field of protocol security protection. The method includes the following: a node traversal table is built, the node traversal table is scanned and analyzed according to the protocol trigger sequence rule, a first security evaluation factor of a protocol stack is determined, and a second security evaluation factor of each protocol is determined based on protocol normal application rule, and the trustworthiness degree of the second security factor is determined based on the first security factor, and the second security factor is revised based on the trustworthiness degree, and the security state of the protocol is determined according to the revised second security factor, thus the analysis of the protocol state is realized, and the security of the protocol can be accurately determined.

Abstract: Disclosed is a method for wireless communication for determining the position of a wireless node. The method comprises receiving a set of reference signals from a set of at least four positioning devices, wherein the positioning devices are not arranged in a single plane. A signal propagation delay of each one of the set of reference signals is determined and a position of each one of the set of positioning devices is obtained. A convex localization problem is solved for the wireless node based at least in part on the determined signal propagation delay of each one of the set of reference signals and the position of each one of the set of positioning devices. The position of the wireless node is determined based at least in part on solving of the convex localization problem.

Abstract: Methods, apparatus, and systems that relate to rate matching scheme design for polar coding, PAC coding, or other pre-transformed polar coding are disclosed. In one example aspect, a method for digital communication includes determining, by a first node, an output bit sequence having E bits based on an input bit sequence having K bits, wherein the output bit sequence is determined by performing a polar transform with H components and a pre-transform; wherein the polar transform is based on H polar matrices G(N0), G(N1), . . . , G(NH?0), wherein E, K, H are integers greater than 1, wherein a polar matrix G(N0) is of size Ni. The method also includes transmitting, by the first node, a signal including the output bit sequence to a second node.

Abstract: A method includes placing a wafer in a process bath filled with a process solution; determining whether the wafer is in the process bath after a pre-set process time after placing the wafer in the process bath; and in response the determination determines that the wafer is in the process bath after the pre-set process time, draining the process solution from the process bath while the wafer is in the process bath.

Abstract: Disclosed are a molecular imaging method using Raman spectra and system based on machine learning cascade. The system includes a coordinate localization module, a hierarchical clustering analysis module, a Raman predictive imaging module, and a similarity analysis module. An untreated frozen tissue slice is attached to a stainless steel slide, and an adjacent slice is attached to a glass slide. The coordinate localization module can match a Raman white light image of a detection sample attached to the stainless steel slide with an immunohistochemistry (IHC) image of the adjacent slice, such that Raman spectra of a target region are accurately collected. The hierarchical clustering analysis module purifies different types of Raman spectra. A machine learning classifier is configured to build a Raman predictive imaging model. The similarity analysis module can evaluate similarity between a predicted Raman predictive image and the IHC image of the adjacent slice.

Abstract: The technology of this application relates to a data packet transmission method and an apparatus, and relates to the field of wireless communication. Time units occupied by a first transport channel and a second transport channel may be separately determined, a data packet is sent to a first terminal in the time unit occupied by the first transport channel, and a data packet is sent to a second terminal in the time unit occupied by the second transport channel. The first transport channel and the second transport channel carry data packets, the first transport channel occupies N time units, at least two of the N time units are discontinuous in time domain, the second transport channel occupies M time units, at least two of the M time units are discontinuous in time domain, the N time units do not overlap the M time units, and N and M are natural numbers greater than 1.

Abstract: The present disclosure provides a two-stage cavitation generator for organic wastewater treatment, including a shrouded impeller, a stator, and a rotor. The shrouded impeller includes a front cover plate, blades, and a rear cover plate. Several blades are evenly distributed between the front cover plate and the rear cover plate. A working surface of the blade is an arc surface, and a back of the blade protrudes locally, so that a flow channel between the back of the blade and a working surface of its adjacent blade is narrowed locally, forming a throat structure. An outlet of the shrouded impeller is provided with the stator and the rotor, and the stator is located at an outer edge of the front cover plate and fixed on an inner wall of a volute. The rotor is mounted on the rear cover plate.

Abstract: A device for separating and recovering flat-plate catalyst powder and a method for determining a wear ratio are provided. The device includes a powder separation unit and a powder recovery unit, a powder accumulation bin is respectively connected with a shell and a catalyst powder outlet, a cyclone outlet is configured on an inner side of a recovery shell, and a primary filter and a secondary filter are configured on an inner side wall of the recovery shell.

Abstract: The present invention provides an oil slurry filter, a filter unit including the oil slurry filter, a multiple-filter system including the oil slurry filter, and a multiple-stage filter system including the oil slurry filter. Due to the use of the filter component of flexible texture in the oil slurry filter of the present invention, the problems that the filter material is easily blocked by high-viscosity colloidal impurities, the regeneration efficiency of the filter is poor and the filtration efficiency is low are solved, and it is possible to make the backwash treatment of the filter residue more convenient and improve the regeneration efficiency of the filter. The present invention also provides a filtering process using the oil slurry filter to ensure long-term stable operation of the oil slurry filtering process.

Abstract: The invention discloses a method and system for preparing multi-compound ester insulating oil. The method utilizes vacuum esterification, involving esterification of pentaerythritol and fatty acid, followed by vacuum distillation, adsorption, washing, suction filtration, and vacuum drying to produce pure synthetic ester insulating oil. By detecting saturated fatty acid content, polarization strength, and closed-cup flash point, the most suitable natural ester insulating oil is selected. Ten different proportions of mixed ester insulating oils are obtained through blending and tested for mass and heat changes in nitrogen and air environments. Dielectric performance parameters at varying temperatures are analyzed to calculate activation energy. The resulting mixed ester insulating oil, NSE3 (85 vol % KA+15 vol % FR3), exhibits a high flash point, low pour point, and high AC breakdown voltage, offering excellent comprehensive performance.

Abstract: Methods, devices and computer readable media for interacting with a generated timeline user interface on an electronic device (ED) are provided. The method includes receiving, for a user associated with the electronic device, a user input in respect of an event corresponding to an event record stored in a timeline user database associated with the timeline user interface, generating a set of predefined actions for the event, based on the corresponding event record; and performing one or more actions of the set of predefined actions, on the electronic device.

Abstract: Methods, apparatus, and systems that relate to Polarization-Adjusted Convolutional (PAC) coding with variable lengths are disclosed. In one example aspect, a method for digital communication includes determining, by a first node, an output bit sequence having E bits based on an input bit sequence having K bits. The output bit sequence is determined based on a transform that is applied prior to applying a Polar transform having a size of N. The transform is based on at least one index set that is a subset of a set of bit indices. The set of bit indices comprises all non-negative integers that are less than N and wherein K<N and K<E. The method also includes transmitting, by the first node, a signal including the output bit sequence to a second node.

Abstract: The present disclosure provides a semiconductor device. The semiconductor device includes a substrate, an active region on the substrate, and a gate structure, a source conductor, and a drain conductor disposed on the active region. The semiconductor device further comprises a first type doped region of the active region below the gate structure and a second type doped region of the active region adjacent to the first type doped region, and the first type doped region is different from the second type doped region. The second type doped region is configured to function as a resistor.

Abstract: Power converters with integrated controllable coupling inductors are described. An example power converter includes a number of converter stages and an integrated coupled inductor. The integrated coupled inductor includes a magnetic core having a first side leg, a first leg, a center leg, a second leg, and a second side leg. The integrated coupled inductor also includes a first and second windings for first and second converter stage among the converter stages. The first winding extends around the first leg, and the second winding extends around the second leg of the magnetic core. The integrated coupled inductor can also include a second magnetic core with third and fourth windings for additional converter stages and a coupling winding extending around center legs of the magnetic core and the second magnetic core. The integrated coupled inductor does not include a coupling inductor separate from the magnetic core and the second magnetic core.