Abstract: A polydentate organic ligand, a preparation method and an application method thereof, a metallo-supramolecular polymer and a preparation method thereof are provided. A structure of triphenylamine is combined with a structure of phenanthroline to serve as the polydentate organic ligand, which takes advantages of a large-volume distortion structure and excellent electroactivity of the triphenylamine. The polydentate organic ligands have good solubility, which provides lower-cost and diversified methods for preparing the metallo-supramolecular polymers. Meanwhile, the phenanthroline has a rigid structure and a conjugated large ? bond in its molecule, which facilitates chelating coordination with metal ions to form a stable compound. Therefore, the polydentate organic ligand enables the metallo-supramolecular polymer to have good transferability, stable electroactivity, and high conversion speed, i.e., fast response speed, excellent electrochromic cycling stability and long service lifetime.

Abstract: An application of fengycin family lipopeptides in pest control is provided, and Fengycin family lipopeptides are used for pest control, with especially strong killing effects on Homoptera and Coleoptera pests. A method is provided for treating seeds with fengycin to protect seeds and plant organs formed later from pests, so as to protect seeds from pests by coating the fengycin family lipopeptides on the surface of seeds.

Abstract: The present disclosure provides a displaying backplane and a displaying device, and relates to the technical field of displaying. The displaying backplane includes: a substrate base plate; a first active layer and a second active layer that are provided on the substrate base plate, wherein the material of the first active layer and the second active layer is an oxide semiconductor, the first active layer has a first channel region and first no-channel regions, and the second active layer has a second channel region and second no-channel regions; a first grid insulating layer covering the first active layer and the second active layer; and a first grid and a second grid that are provided on the first grid insulating layer; wherein the oxygen-vacancy concentration of the first channel region is greater than the oxygen-vacancy concentrations of the first no-channel regions, the second no-channel regions and the second channel region.

Abstract: The present invention discloses a flue gas low-temperature adsorption denitrification method, including: pressurizing a flue gas that has been subjected to dust removal and desulfurization, precooling the pressurized flue gas, cooling the precooled flue gas to a temperature lower than room temperature by a flue gas cooling system, flowing the flue gas at the temperature lower than room temperature into a low-temperature denitrification system, performing physical adsorption denitrification in the low-temperature denitrification system, precooling the flue gas that has been subjected to dust removal and desulfurization with the denitrificated flue gas, and flowing the heat-absorbed clean flue gas into a chimney to be discharged.

Abstract: An adaptive characteristic spectral line screening method and system based on atomic emission spectrum are provided, the method includes: using a set characteristic screening optimization method to perform a plurality of optimization rounds of characteristic screening, obtaining an initialized spectral dataset of each round of the characteristic screening and initialized characteristic population genes; obtaining an optimal characteristic population gene of each round by a set analysis method, a fitness function, and an iteration of a genetic algorithm; obtaining an optimized characteristic spectral information set when the plurality of optimization rounds reach set optimization rounds; performing combination statistics and discriminant analyses on the optimized characteristic spectral information set to complete an adaptive characteristic spectral line screening.

Abstract: The present invention belongs to the technical field of composite material processing, and relates to a hole making tool for aramid fiber-reinforced plastic and a design method thereof. The drill bit has a step reversed point angle structure, which can reduce a trust force during drilling and effectively cut off a high toughness aramid fiber, thus to improve the hole making quality of an AFRP-related component. It is proved that the new tool can significantly improve the hole making quality of an AFRP component, improve the service life and safety degree, and greatly reduce the processing cost. Therefore, the present invention has a broad application prospect in the fields of aerospace, military industries and civil application.

Abstract: A composite material laying structure, a composite material vehicle body, and a composite material laying method, the composite material laying structure comprising a profile provided with multiple quadrilateral cavities reinforced by lap joints after butt joint connection, the quadrilateral cavities comprising square cavities and profile cavities, and the square shape of the square cavities transitioning along the profile into the trapezoidal shape of the profile cavities. The present composite material laying structure employs the laying structure of the composite material profile and a butt joint lap-joint form.

Abstract: An instrument and method for mechanical properties in situ testing of materials under a high temperature and complex mechanical loads are provided. The instrument includes: a support frame module used to provide a stable support and an effective vibration isolation for each functional module of the instrument; a high-frequency fatigue load applying module used to apply a high-frequency fatigue load on a tested sample; a static-dynamic mechanical load applying module used to apply a combination of static-dynamic tension/compression/bending loads on the tested sample; a high/low temperature applying module used to apply a variable temperature environment from a low temperature to a high temperature on the tested sample; and an in-situ monitoring module that may integrate a surface deformation damage measurement assembly, a three-dimensional strain measurement assembly, a microstructure measurement assembly, and an internal damage detection assembly according to a practical testing requirement.

Abstract: The present disclosure relates to a traceable in-situ micro- and nano-indentation testing instrument and method under variable temperature conditions. A macro-micro switchable mechanical loading module, a nano mechanical loading module and an indentation position optical positioning module are fixed on a gantry beam, an optical imaging axis of an optical microscopic in-situ observation or alignment module and a loading axis of the nano mechanical loading module are coplanar, the optical microscopic in-situ observation or alignment module and the function switchable module are mounted on a table top of a marble pedestal, and a contact or ambient mixed variable temperature module is fixedly mounted on the function switchable module. A modular design is adopted, the micro- and nano-indentation testing instrument is used as a core, in combination with a multi-stage vacuum or ambient chamber, an indentation depth traceability calibration module and multiple sets of optical microscopic imaging assemblies.

Abstract: An assembly-type car body and a rail vehicle. A roof, an underframe, side roofs and side walls of the assembly-type car body are separately formed by assembling double-layer pultruded profiles, and each double-layer pultruded profile comprises an outer plate, an inner plate and cavities formed by separating an interlayer between the outer plate and the inner plate using ribs; the upper edge and the lower edge of each side roof are respectively connected to an edge of the roof and the upper edge of a side wall by means of lapping joints, and the lower edge of each side wall is connected to an edge of the underframe by means of a side wall connector; each side wall connector is a double-layer pultruded profile unit, the upper edge of the side wall connector is connected to the lower edge of the side wall by a plug joint.

Abstract: A composite material laying structure, a composite material vehicle body, and a composite material laying method, the composite material laying structure comprising a profile provided with multiple quadrilateral cavities reinforced by lap joints after butt joint connection, the quadrilateral cavities comprising square cavities and profile cavities, and the square shape of the square cavities transitioning along the profile into the trapezoidal shape of the profile cavities. The present composite material laying structure employs the laying structure of the composite material profile and a butt joint lap-joint form.

Abstract: Disclosed is a battery in-situ test system. The battery in-situ test system comprises a charging and discharging module, an environment module and a mechanical loading module, wherein a to-be-tested battery is electrically connected with the charging and discharging module, the environment module comprises a temperature control box, the to-be-tested battery, an optical imaging module, an infrared thermal imaging module and an ultrasonic scanning imaging module are arranged in the temperature control box.

Abstract: An instrument and method for mechanical properties in situ testing of materials under a high temperature and complex mechanical loads are provided. The instrument includes: a support frame module used to provide a stable support and an effective vibration isolation for each functional module of the instrument; a high-frequency fatigue load applying module used to apply a high-frequency fatigue load on a tested sample; a static-dynamic mechanical load applying module used to apply a combination of static-dynamic tension/compression/bending loads on the tested sample; a high/low temperature applying module used to apply a variable temperature environment from a low temperature to a high temperature on the tested sample; and an in-situ monitoring module that may integrate a surface deformation damage measurement assembly, a three-dimensional strain measurement assembly, a microstructure measurement assembly, and an internal damage detection assembly according to a practical testing requirement.

Abstract: The present disclosure provides a compound eye-based in-situ monitoring unit, a micro-adjustment unit, and a multi-spectral imaging system thereof. The compound eye-based in-situ monitoring unit includes a spherical installation cover and an imaging assembly disposed on the spherical installation cover, where the spherical installation cover is provided with a spherical grid array, the spherical grid array includes 20 installation points (five rows and four columns), one imaging assembly is installed on each installation point, the imaging assemblies include a charge coupled device (CCD) optical digital camera assembly, a digital image correlation (DIC) light source assembly, an infrared (IR) spectrum assembly, a Raman spectrum assembly, and a terahertz light source assembly.

Abstract: A lithium ion battery with an internal heating device including a cell provided inside the battery, a first cell tab and a second cell tab provided at the upper end of the cell, and the first cell tab and the second cell tab respectively connected to the cell, a heat generating device inside the cell and including a first layer of heating sheet respectively connected to a first tab of the first layer and a second tab of the first layer extending outside of the cell, a control switch composed of a first control switch and a second control switch, wherein an external equipment and the second control switch form a first branch, the first and second cell tabs and the cell form a second branch, and the first and second tabs, the first layer, and the first control switch form a third branch.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for liveness detection are provided. One of methods includes: displaying an image to a user, and capturing a face image of the user while displaying the image to the user; determining an eye image of an eye of the user based on the face image; extracting a to-be-verified image from the eye image of the user, wherein the to-be-verified image is reflection of the displayed image in the eye of the user; comparing the displayed image with the to-be-verified image to determine whether the to-be-verified image matches the displayed image; and performing liveness detection on the user based on a result of comparison.

Abstract: A model training method includes: acquiring a plurality of user data pairs, wherein data fields of two sets of user data in each user data pair have an identical part; acquiring a user similarity corresponding to each user data pair, wherein the user similarity is a similarity between users corresponding to the two sets of user data in each user data pair; determining, according to the user similarity corresponding to each user data pair and the plurality of user data pairs, sample data for training a preset classification model; and training the classification model based on the sample data to obtain a similarity classification model.

Abstract: The present disclosure relates to a traceable in-situ micro- and nano-indentation testing instrument and method under variable temperature conditions. A macro-micro switchable mechanical loading module, a nano mechanical loading module and an indentation position optical positioning module are fixed on a gantry beam, an optical imaging axis of an optical microscopic in-situ observation or alignment module and a loading axis of the nano mechanical loading module are coplanar, the optical microscopic in-situ observation or alignment module and the function switchable module are mounted on a table top of a marble pedestal, and a contact or ambient mixed variable temperature module is fixedly mounted on the function switchable module. A modular design is adopted, the micro- and nano-indentation testing instrument is used as a core, in combination with a multi-stage vacuum or ambient chamber, an indentation depth traceability calibration module and multiple sets of optical microscopic imaging assemblies.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for liveness detection are provided. One of methods includes: displaying an image to a user, and capturing a face image of the user while displaying the image to the user; determining an eye image of an eye of the user based on the face image; extracting a to-be-verified image from the eye image of the user, wherein the to-be-verified image is reflection of the displayed image in the eye of the user; comparing the displayed image with the to-be-verified image to determine whether the to-be-verified image matches the displayed image; and performing liveness detection on the user based on a result of comparison.