Abstract: The present invention discloses radio frequency transmitting and receiving devices and an unmanned aerial vehicle system. The radio frequency transmitting device comprises: a first crystal oscillator, configured to provide a first clock signal with a frequency f; a reference signal receiving circuit, configured to receive a reference signal with a frequency (N?1)×f transmitted by a radio frequency receiving device; a frequency mixer, configured to perform frequency mixing processing on the first clock signal and the reference signal to obtain a carrier signal with a frequency N×f; a modulating circuit, configured to load a signal to be transmitted on the carrier signal, to obtain a frequency band signal; and a first transmitting circuit, configured to transmit the frequency band signal to the radio frequency receiving device. The radio frequency transmission performed according to the present invention has higher resistance to instantaneous vibration.

Abstract: A magnetic tunnel junction is disclosed wherein the reference layer and free layer each comprise one layer having a boron content from 25 to 50 atomic %, and an adjoining second layer with a boron content from 1 to 20 atomic %. One of the first and second layers in each of the free layer and reference layer contacts the tunnel barrier. Each boron containing layer has a thickness of 1 to 10 Angstroms and may include one or more B layers and one or more Co, Fe, CoFe, or CoFeB layers. As a result, migration of non-magnetic metals along crystalline boundaries to the tunnel barrier is prevented, and the MTJ has a low defect count of around 10 ppm while maintaining an acceptable TMR ratio following annealing to temperatures of about 400° C. The boron containing layers are selected from CoB, FeB, CoFeB and alloys thereof including CoFeNiB.

Abstract: Disclosed is a method of distributed data redundancy storage using consistent hashing, which is used for selection of pre-stored data in the distributed position in storage cluster. The method is implemented by establishing a logical topology for each storage node in a distributed storage system, determining the position of each node in a storage node sequence corresponding to each hash subspace by using consistent hashing, and then determining a number of data copies and each piece of stored data according to the redundant storage policy of pre-stored data; and storing each piece of stored data in a different storage node according to storage rules.

Abstract: The present invention discloses an infrared obstacle detection method and device and a robot. The method comprises the following steps: controlling an emission module to radiate infrared light to the outside; acquiring first infrared light received by a first reception module and second infrared light received by a second reception module, wherein the first reception module is disposed relative to the emission module such that the first infrared light comprises reflected light obtained by reflecting, by an obstacle, the infrared light radiated by the emission module to the outside and infrared light in ambient light, and the second reception module is disposed relative to the emission module such that the second infrared light is the infrared light in the ambient light; and comparing the first infrared light and the second infrared light, and determining that the obstacle is detected when an energy difference between the first infrared light and the second infrared light is larger than a preset threshold.

Abstract: The present disclosure provides compounds of Formula (I) and pharmaceutically acceptable salts thereof. Related pharmaceutical compositions are disclosed. Methods of treatment with the disclosed compounds and compositions are also disclosed. Related kits are further disclosed.

Abstract: Retention of events of an ordered event stream is disclosed. Expiration of events stored in a segment of an ordered event stream (OES) can be desirable. New events are added to a head of an OES segment, and pruning events from a tail of the OES segment can be valuable. Processing applications can register a processing scheme for a segment, e.g., at-least-once processing, exact1y-once processing, etc., and can generate checkpoints indicating a degree of advancement in processing events of the segment. The ordered event stream can determine a cut point indicative of a progress point, that before which, events of an OES can be marked as ready for expiration. However, events that are marked for expiration can be retained to allow processing based on a checkpoint, e.g., expiration of the event can be refused until there is an assurance the event was read by the processing application.

Abstract: A wide-band antenna multiplexing method and device of an unmanned aerial vehicle (UAV) are disclosed. The method comprises: by a wide-band antenna, receiving an external signal and sending the received external signal to a first power divider; by the first power divider, dividing the external signal received from the wide-band antenna into multi-way sub-signals, and sending each sub-signal respectively to a receiving filter of a plurality of receiving filters, each of which is connected to the first power divider and corresponds to a functional modules of the UAV respectively; and by each respective receiving filter, performing filtering processing on the received sub-signal, obtaining a signal corresponding to the working frequency band of each respective functional module of the UAV, and sending the signal corresponding to the working frequency band of each respective functional module of the UAV to a corresponding functional module.

Abstract: A method and system for determining an irradiation dose. The method for determining the irradiation dose includes determining a pixel having a biological feature in a region of interest in a radiotherapy simulated locating image by using a retrospective label; extracting a local radiomics feature based on the pixel having the biological feature, in which the local radiomics feature includes a grayscale histogram intensity, a tumor shape feature, a textural feature, a Laplacian of Gaussian filtering feature, and a wavelet feature; acquiring the local radiomics features to be measured; identifying a positive region having the local radiomics features to be measured based on the local radiomics features; performing three-dimensional reconstruction for the peripheral boundary of the positive region to determine a three-dimensional image.

Abstract: Printable inks based on a 2D semiconductor, such as MoS2, and its applications in fully inkjet-printed optoelectronic devices are disclosed. Specifically, percolating films of MoS2 nanosheets with superlative electrical conductivity (10-2 s m-1) are achieved by tailoring the ink formulation and curing conditions. Based on an ethyl cellulose dispersant, the MoS2 nanosheet ink also offers exceptional viscosity tunability, colloidal stability, and printability on both rigid and flexible substrates. Two distinct classes of photodetectors are fabricated based on the substrate and post-print curing method. While thermal annealing of printed devices on rigid glass substrates leads to a fast photoresponse of 150 ?s, photonically annealed devices on flexible polyimide substrates possess high photoresponsivity exceeding 50 mA/W.

Abstract: A sleeping bag that includes a front side and a rear side. The front side has a first graphic member coupled to a surface of the front side. The first graphic member extends from a lower portion upwards to at least a middle portion of the sleeping bag. A fastener that has a front mating member and a rear mating member, wherein the front mating member can be coupled to a lower portion of the front side and the rear mating member can be coupled to the rear side and adjacent to a bottom of the sleeping bag. A second graphic member coupled to the rear side, and above and adjacent to the rear mating member.

Abstract: The invention relates to a method for preparing a vinyl ether polymer by photo-initiated polymerization, which comprises the step of: under a protective atmosphere, performing photo-initiated polymerization on a vinyl ether monomer in the presence of an organic halogenated hydrocarbon and manganese carbonyl under irradiation of light having a wavelength of 365-550 nm at ?25° C. to 25° C., to obtain a vinyl ether polymer after the reaction is completed. In the method, a vinyl ether monomer is subjected to cationic polymerization in the presence of manganese carbonyl and an organic halogenated hydrocarbon under visible light, to prepare a vinyl ether polymer with controlled molecular weight and narrow molecular weight distribution.

Abstract: Disclosed is a method of data concurrent recovery for a distributed storage system, that is, a method for synchronous repair of multiple failed nodes with a minimum recovery bandwidth when a node in a distributed storage system fails. First an assistant node is selected to get helper data sub-block, then the repair matrix related to the data block stored in the node to be repaired is constructed, and finally the lost data block is reconstructed by multiplying the repair matrix and the helper data helper data sub-block; the missing data block is reconstructed by decoding, wherein the node to be recovered includes all failed systematical nodes, or all or partly failed parity nodes. The method is applicable to concurrently recover multiple failed nodes at minimal recovery bandwidth, and the nodes to be recovered are selected according to the demand to reduce the recovery bandwidth as much as possible.

Abstract: A method for estimating the pressure measurement bias of a barometric sensor in a wireless terminal. A location engine using the method generates an enhanced estimate of the measurement bias. The location engine generates the enhanced estimate based in part on Global Navigation Satellite System (GNSS)-based estimates of the elevation of the wireless terminal, which the terminal generates as it concurrently makes barometric pressure measurements. Each GNSS-based estimate of elevation is often generated from noisy measurements and has an associated uncertainty. The location engine accounts for the uncertainty in the GNSS estimates of elevation by applying an optimal estimation technique, such as Kalman filtering, on the biased pressure measurements and the GNSS-based estimates.

Abstract: A method for estimating the pressure measurement bias of a barometric sensor in a wireless terminal. A location engine using the method generates an enhanced estimate of the measurement bias. The location engine generates the enhanced estimate based in part on relatively coarse estimates of the elevation of the wireless terminal. The coarse estimates are used to generate instantaneous estimates of measurement bias and bias uncertainty. As needed, the location engine adjusts the instantaneous estimate of bias uncertainty, in order to reflect an instantaneous estimate of measurement bias that is recognized as being in error. The adjustment is based on what is expected as a probable measurement bias value for the particular wireless terminal. Once the location engine generates the enhanced estimate of measurement bias, it can generate improved estimates of elevation of the wireless terminal.

Abstract: A method for estimating the pressure measurement bias of a barometric sensor in a wireless terminal. A location engine using the method generates an enhanced estimate of the measurement bias. The location engine generates the enhanced estimate based in part on relatively coarse estimates of the elevation of the wireless terminal. Each coarse estimate of elevation is often generated from noisy measurements, such as measurements of signals transmitted by Global Positioning System (GPS) satellites, and has an associated uncertainty. The location engine accounts for the uncertainty in these estimates of elevation by applying an optimal estimation technique, such as Kalman filtering, and by compensating for environment-related effects. Compensating includes filtering across a plurality of lateral locations and imposing a lower bound of bias uncertainty at the lateral locations.

Abstract: The present application discloses a blade, comprising a blade tip, a blade root, a leading edge, and a trailing edge, wherein the leading edge and the trailing edge each extend from the blade tip to the blade root; the blade may rotate around a rotation axis, and the rotation axis and a normal plane of the rotation axis perpendicularly intersect at the foot of the perpendicular; a projection of the leading edge on the normal plane along the rotation axis is a first curve, and the first curve has an even number of inflection points. The blade of the present application can reduce noise and improve aerodynamic performance when the blade rotates.

Abstract: A high-frequency vibration welding conditioning system for achieving better metal material properties is disclosed, which comprises a host computer, a signal generator, a power amplifier, a high-frequency vibrator, a high-frequency vibration energy amplification and transfer device, an acceleration sensor, and a cooling module, the host computer controlling the signal generator to output a sinusoidal excitation signal which is independently and continuously adjustable in amplitude and frequency, the sinusoidal excitation signal being inputted to the high-frequency vibrator via the power amplifier.

Abstract: Separators, high performance electrochemical devices, such as, batteries and capacitors, including the aforementioned separators, systems and methods for fabricating the same. In one implementation, a separator is provided. The separator comprises a polymer substrate (131), capable of conducting ions, having a first surface and a second surface opposing the first surface. The separator further comprises a first ceramic-containing layer (136), capable of conducting ions, formed on the first surface. The first ceramic-containing layer (136) has a thickness in arrange from about 1,000 nanometers to about 5000 nanometers. The separator further comprises a second ceramic-containing layer (138), capable of conducting ions, formed on the second surface. The second ceramic-containing layer (138) is a binder-free ceramic-containing layer and has a thickness in arrange from about 1 nanometer to about 1,000 nanometers.

Abstract: A method includes receiving tester configuration data, test pattern data, and tester operation data; configuring a circuit for performing a designated test evaluation; generating a stimulus waveform; converting the stimulus waveform to an analog stimulus signal; transferring the analog stimulus signal to a first terminal of a MTJ DUT at reception of a trigger timing signal; generating time traces based on the trigger timing signal; generating a response signal at a second terminal of the MTJ DUT and across a termination resistor as the analog stimulus signal is transferred through the MTJ DUT; converting the response signal to a digitized response signal indicating its voltage amplitude; and performing the designated test evaluation and analysis function in the configurable circuit based on voltage amplitudes and time values of the stimulus waveform, the digitized response signal, and the timing traces.

Abstract: The disclosure provides a projection method and projection device. The method comprises: acquiring a sound signal sent by a user; performing locating to determine a positional relationship between the user and the projection device according to the sound signal sent by the user; determining a projected image orientation meeting viewing requirements of the user according to the positional relationship between the user and the projection device; and projecting an image to be projected onto a projection plane according to the projected image orientation. By use of the projection method provided by the disclosure, the projected image orientation may be automatically adjusted according to the viewing requirements of the user, and convenience and friendliness for human-computer interaction may be improved.