Abstract: In the thermoelectric power generator, a first heat insulation layer is paved on a partial lower surface of a first heat conduction and insulation end surface; a first electric conduction electrode is arranged on a lower surface of the first heat conduction layer and a lower surface of the first heat conduction and insulation end surface; a second electric conduction electrode is arranged opposite to the first electric conduction electrode and adaptive to the first electric conduction electrode; a thermoelectric component includes a plurality of P—N type thermoelectric arms connected in series; and a second heat conduction and insulation end surface is arranged opposite to the first heat conduction and insulation end surface, and an upper surface of the second heat conduction and insulation end surface is in partial contact with the second electric conduction electrode and in partial contact with the second heat insulation layer.

Abstract: A mechanical breaking and fusing combined multi-fracture excitation fuse includes a shell, wherein a cavity is formed in the shell, and at least one conductor penetrates through the shell and penetrates through the cavity; at least one excitation device and one breaking device are arranged in the cavity of the shell; the excitation device can receive an external excitation signal to drive the breaking device to act to break a conductor corresponding thereof to form at least two fractures on the conductor, at least one fuse is connected in parallel onto the conductor. The melt is connected in parallel with at least one fracture, and the melt is connected in series with at least one fracture.

Abstract: Provided are a series of ionic compounds and a preparation method therefor and a use thereof as energetic materials.

Abstract: Disclosed is a grinding wheel for online measurement of a grinding force, including a grinding wheel part with a grinding wheel base, CBN abrasive sheets and grinding wheel cover plate, and an acquisition part with tangential, axial, radial strain gauges and a signal unit for signal acquisition and transmission. A concave side end face of the grinding wheel base is provided with a signal unit mounting groove, the grinding wheel cover plate is sealed with the concave side end face, and the CBN block abrasive sheets are bonded on an outer circumferential surface of the grinding wheel base; the tangential, axial and radial strain gauges are respectively arranged on the outer circumferential surface along tangential and axial directions and in the signal unit mounting groove along radial direction; signal output ends of the tangential, axial and radial strain gauges are respectively connected with an input end of the signal unit.

Abstract: A method of a power user classification based on distributed K-means, a storage medium and a classification device are provided. The method includes: obtaining, by N load aggregators, power consumption data of power users managed by respective load aggregators; performing, by each load aggregator, a normalization operation on time series load data of the power users managed by the load aggregator; forming a N×N dimensional adjacency matrix A; performing K-means clustering on normalized time series load data, to obtain the respective centroids and user groups characterized by the respective centroids; sharing, by the respective load aggregators, the centroids and the number of users under the respective centroids based on the adjacency matrix A, and obtaining consistent centroids by multiple load aggregators; after an overall iteration ends, obtaining, by the respective load aggregators, the consistent centroids consistent with the K-means centroid based on global data, to realize user classification.

Abstract: Sunshading louver control system and method based on gesture recognition are provided. Indoor images are collected in real time. Based on the indoor images, an action region of gesture motion is positioned and feature extraction is performed thereon to obtain hand motion parameters. The hand motion parameters are analyzed to obtain gesture information. The gesture information is compared with preset gesture information. When the preset gesture information contains the gesture information, corresponding adjustment is performed on a sunshading louver according to a preset operation logic corresponding to the gesture information. When the preset gesture information does not contain the gesture information, the gesture information is determined to be invalid.

Abstract: The present disclosure provides a multi-exposure image fusion (MEF) method based on a feature distribution weight of a multi-exposure image, including: performing color space transformation (CST) on an image, determining a luminance distribution weight of the image, determining an exposure distribution weight of the image, determining a local gradient weight of the image, determining a final weight, and determining a fused image. The present disclosure combines the luminance distribution weight of the image, the exposure distribution weight of the image and the local gradient weight of the image to obtain the final weight, and fuses the input image and the weight with the existing pyramid-based multi-resolution fusion method to obtain the fused image, thereby solving the technical problem that an existing MEF method does not consider the overall feature distribution of the multi-exposure image.

Abstract: The present invention belongs to the field of bioengineering technologies, and in particular, to a production method of recombinant Escherichia coli (E. coli) and high-purity ursodeoxycholic acid (UDCA). The present invention constructs novel double-enzyme co-expression gene engineered bacteria, that is, recombinant E. coli. The bacteria simultaneously expresses 7?-hydroxysteroid dehydrogenase (7?-HSDH) and glucose dehydrogenase (GDH). The bacteria is applicable to the production of high-purity UDCA. The yield of a target product is increased through the joint expression and application of 7?-HSDH and GDH. The production method of high-purity UDCA in the present invention is simple, generates a small amount of impurities in a production process, is a green process that satisfies environmental protection requirements, and has significant industrial application value.

Abstract: A method of preparing a piezoelectric single crystal with high piezoelectricity and near- perfect transparency. The method includes depositing electrodes on two opposition surfaces of a piezoelectric single crystal which is a ferroelectric crystal; AC-poling the piezoelectric single crystal through the electrodes by repeatedly changing polarity of an AC electric field; and after polarization, removing the electrodes on the two opposition surfaces of the piezoelectric single crystal and then depositing Ag nanowire or indium tin oxide (ITO) as electrodes on the two opposition surfaces of the piezoelectric single crystal. Repeatedly changing the polarity of the polarized electric field can increase the domain size of the ferroelectric crystal, or reduce the domain wall density of the domain structure, thereby improving the transparency of the piezoelectric single crystal having high piezoelectric.

Abstract: A method for joint optimization of resource allocation includes: obtaining network data volumes of two services; obtaining queue statuses at a time t; computing sub-channel slices; computing a local CPU speed scaling, a user association, a sub-carrier assignment, and a power allocation of service 1; computing a user association, a video quality decision, and a sub-carrier assignment of service 2; obtaining an initial sub-carrier assignment and an initial power allocation; obtaining the user association; obtaining the power allocation and the sub-carrier assignment of service 1; obtaining the video quality decision; obtaining the sub-carrier assignment of service 2; obtaining an optimal data transmission rate and the user association to obtain a data rate allocation; and obtaining an optimal CPU speed scaling, an optimal user association, an optimal sub-carrier assignment, an optimal power allocation, an optimal video quality decision and an optimal sub-channel allocation.

Abstract: Disclosed are a test loop for simulating a steam generator with or without an axial economizer and a test method thereof. The loop includes a cooling water loop, a water supply loop, a recirculated water loop and a power supply. The cooling water loop is used for condensing and cooling wet steam and providing the wet steam to the water supply loop and the recirculated water loop. The water supply loop is used for providing cold-state water supply for a test device, the recirculated water loop is used for reheating cooled water to be saturated and providing the water to the test device. The power supply is used for supplying power to heating equipment and an electric heater in the test device. The present disclosure provides a test method of the loop. Simulation tests can be carried out on a steam generator with or without an axial economizer.

Abstract: A use of a compound as a CYP2E1 inhibitor includes: using a compound shown in formula (I) or a salt thereof as an inhibitor to inhibit CYP2E1, where the compound or the salt thereof targets and binds to CYP2E1. The inhibitor can be used for the prevention and treatment of a tumor including liver cancer, glioma, ovarian cancer, lung cancer, bladder cancer, and gallbladder cancer. The inhibitor can also be used for the prevention and treatment of an inflammation-mediated disease (IMD) such as liver damage, fatty liver, hepatitis, liver fibrosis, pulmonary fibrosis, rheumatic and rheumatoid arthritis, sepsis, Alzheimer's disease (AD), ischemic stroke, Parkinson's disease (PD), hyperlipidemia, atherosclerosis (AS), coronary heart disease (CHD), and diabetes.

Abstract: Provided are a data transmission method, apparatus and computer readable storage medium.

Abstract: A battery protection circuit, which includes: a power supply terminal, a power ground terminal, an overcharge voltage protection sub-circuit, an over-discharge voltage protection sub-circuit, a discharge over-current protection sub-circuit, a reference voltage generation sub-circuit, a frequency generation sub-circuit, a controller and a first switch sub-circuit. The battery protection circuit further includes a shipping input terminal, the battery protection circuit is configured to enter a shipping mode when a first signal is received at the shipping input terminal, and in the shipping mode, at least one sub-circuit of the battery protection circuit is powered off. The present application also provides a battery pack and an electronic device, advantages of the present application include that the current consumption of the battery during transportation and storage can be reduced, and the power retention time of the battery can be increased, so that the user’s experience can be improved.

Abstract: The embodiments of the present disclosure disclose a media method, device and system for generating a media playback sequence. The method includes acquiring a plurality of media identifiers respectively corresponding to a plurality of media, and media playbacks times respectively corresponding to the plurality of media identifiers; comparing a maximum media playbacks time among the media playbacks times with a sum of remaining media playbacks times to obtain a determination result; and selecting, according to the determination result, one of a plurality of different generation methods to generate a media playback sequence for a media player to use to play the plurality of media back, wherein the media playback sequence includes the plurality of media identifiers, and the number of each of the media identifiers in the media playback sequence is equal to the media playbacks time corresponding to each of the media identifiers.

Abstract: A Differential Scanning calorimetry (DSC) thermal analysis method for the action of an applied electric field includes: step 1, in an experiment module of a differential scanning calorimeter, placing a microelectrode crucible and a reference crucible on corresponding sensors, connecting electrode wires of the microelectrode crucible with a signal generator, setting signal parameters to be output, placing a tested sample in a gap between electrodes, closing a microelectrode crucible lid, and closing the experiment module; step 2, at a temperature-varying stage, measuring a DSC curve of the tested sample under the action of an electric field, and at a reheating stage, measuring a DSC curve of the tested sample with no electric field; and step 3, analyzing the DSC curves in combination with the related theories of dielectrics and thermodynamics, and calculating an electric field intensity of the tested sample and a phase transformation rate of the tested sample.

Abstract: The present invention relates to a method for synthesizing artepillin C and a synthetic method for synthesizing an intermediate compound for use in preparing artepillin C. The structural formula of artepillin C is shown in the following formula (IV), and the intermediate compound is shown in the following formula (II). The synthesis method includes the following steps: a first reaction step: in the presence of a base initiator, a compound A shown in formula I and 3,3-dimethylallyl bromide are mixed, the reaction continues for a first reaction time and is stopped to generate an intermediate of artepillin C shown in formula II; and a second reaction step: the intermediate of artepillin C is dissolved in an aqueous alcohol solution and then mixed with an alkali metal salt, and the reaction continues for a second reaction time to generate artepillin C.

Abstract: Embodiments of the disclosure relate to a receiving card, which includes: a circuit board and a programmable logic device, a memory device, a plug-in component, a physical layer transceiver group and a plurality of Ethernet interfaces arranged on the circuit board. The memory device and the plug-in component are electrically connected with the programmable logic device; the plurality of Ethernet interfaces are respectively and electrically connected with a plurality of SerDes channels configured by the programmable logic device through the physical layer transceiver group; each of the plurality of SerDes channels includes two pairs of differential signal lines, and one of the two pairs of differential signal lines is used for transmitting data and the other pair of differential signal lines is used for receiving data.

Abstract: A terahertz polarization beam splitter based on a two-core negative curvature fiber is provided, which relates to the technical field of optical fiber communication. The polarization beam splitter includes: a base circular tube and core separation structures. Multiple large cladding tubes are internally tangent and connected to an inner wall of the base circular tube and arranged at equal intervals along a circumference of the inner wall of the base circular tube, and the multiple large cladding tubes are symmetrically distributed on the inner wall of the base circular tube. Embedded circular tubes are internally tangent and connected to inner walls of the multiple large cladding tubes respectively. The core separation structures are two in number.

Abstract: An ultrahigh-resolution mid-infrared (MIR) dual-comb spectroscopy (DCS) measurement device includes a pump unit, a microring resonator (MRR) unit, a modulation unit, a splitting unit, a testing unit, a signal detection unit, a power balance unit, a reference detection unit and a spectral analysis unit. The measurement method includes: adjusting the laser emitted by the pump unit to the MRR unit; adjusting the modulation unit and performing dual-frequency modulation; generating two sets of MIR optical frequency combs (OFCs) with different repetition rates and splitting the MIR OFCs into the test light and the reference light; performing photoelectric conversion on the test light and injecting the test light to the spectral analysis unit; performing photoelectric conversion on the reference light and injecting the reference light to the spectral analysis unit; and performing Fourier transformation and data processing on test results to obtain absorption spectrum of the to-be-tested sample.