Abstract: A method for breast imaging is provided. The method comprises controlling a breast scanning device to compress a target breast to a compressed state and utilizing a pressure sensor provided on the breast scanning device to acquire a pressure distribution map of the target breast in the compressed state; obtaining a reference identification result by identifying one or more target tissues of the target breast in the pressure distribution map, the one or more target tissues comprising at least one of a lesion tissue or a glandular tissue; determining, based on the reference identification result, one or more target scanning parameters; and controlling, based on the one or more target scanning parameters, the breast scanning device to perform a target scan on the target breast to acquire a target scanning image of the target breast.

Abstract: A method for extending a working range of an imaging system having an optical axis and an aperture stop includes imparting a wavefront aberration on an optical beam, propagating through the aperture stop, that is representable as an expansion of orthonormal circular Zernike polynomials having non-zero coefficients A11, A22, and A37. A working-range-extending phase plate imparts a wavefront aberration on an optical beam, propagating therethrough, that is representable as an expansion of orthonormal circular Zernike polynomials having non-zero coefficients A11, A22, and A37.

Abstract: The present invention relates to an auxiliary method and facility for fish resource recovery in an open water diversion channel, which includes: an inlet of the attraction channel arranged on a side wall of the open water diversion channel, a slope provided inside the attraction channel, wherein a lower end of the slope is located inside the open water diversion channel, and a higher end of the slope is located outside the open water diversion channel, an attracted water flow is arranged at the higher end of the slope to guide fish into the attraction channel and an outlet of the attraction channel is connected to a still water zone, wherein the still water zone is provided with a release device. The present invention effectively guides a significant number of fish that have mistakenly entered the open water diversion channel out of the channel through attracted attraction.

Abstract: A method for separating indium oxide and tin oxide from an ITO waste target by a vacuum method disclosed by the present disclosure, which relate to the field of resource recycling and utilization technology. The method Includes: take ITO waste target raw material, add indium to the ITO waste target raw material, heat and hold under vacuum conditions, then the Indium oxide is obtained by the volatilization of the suboxide of indium into the volatile, and the tin oxide is obtained by remaining of the tin oxide in the condensate. The present disclosure is based on the fact that indium oxide can generate volatile suboxide (In2O) when heated in indium melt, and the generated suboxide can evaporate to the condensation zone for condensation, thereby achieving the separation of indium oxide and tin oxide and achieving resource recovery and utilization of ITO waste target materials.

Abstract: A working-range-extending phase plate includes a central region, an inner annular region surrounding the central region, and an outer annular region surrounding the central region and the inner annular region. The central region has a central phase-transmission function. The inner annular region has an inner phase-transmission function. The outer annular region has an outer phase-transmission function. Respective magnitudes of the central, the inner, and the outer phase-transmission functions are, as a function of radial distance from an optical axis of the phase plate, one of: (i) constant, increasing, and increasing, (ii) decreasing, constant, and increasing, or (iii) decreasing, decreasing, and constant.

Abstract: The present disclosure relates to a detection device, medical imaging apparatus, and medical puncture system. The detection device comprising: a compression unit, configured to compress an object; an X-ray detector, located on one side of the compression unit along a first direction, the X-ray device adapted for acquiring an X-ray image of the object; an ultrasonic detector, spaced apart from the X-ray detector and capable of moving relative to the X-ray detector along a second direction, the ultrasonic detector adapted for acquiring an ultrasonic image of the object.

Abstract: Provided in the present disclosure are an image projection device, and a method for manufacturing the image projection device. The image projection device comprises: an illumination assembly for emitting a light beam; and a first optical component, which is used for allowing light emitted by the illumination assembly to pass through. The image projection device is characterized in further comprising: a first fastening member, which is arranged on the first optical component; a second optical component, which is used for allowing the light passing through the first optical component to pass through; and a second fastening member, which is arranged on the second optical component and adapted to be fastened to the first fastening member, so as to assemble the first optical component and the second optical component as a whole.

Abstract: The present disclosure provides a projection adjustment system and method, and a projection color adjustment system and method. The projection adjustment system comprises an illumination module, a projection module, and a variable diaphragm control module, wherein the illumination module casts light carrying imaging information, wherein the projection module obtains the light carrying the imaging information and then casts it outward to a projection plane, wherein the variable diaphragm control module comprises at least one variable diaphragm and a controller, and wherein each variable diaphragm adjusts at least one diaphragm aperture of the variable diaphragm under the control of the controller, and the light intensity of the light cast outward is adjusted by reducing or enlarging the diaphragm aperture.

Abstract: An obtaining method of the tempering temperature range includes following operations: determining a determination criterion of a tempering weld bead effect of a steel obtained after a welding of; determining an Ac1 temperature at which the steel begins to form or transform into austenite during a welding heating process; obtaining a temperature field distribution during a welding process, and determining a thermal cycle curve and a size distribution of the temperature field in different temperature ranges; using different peak tempering temperatures to simulate the thermal cycle curve and test performances on a microstructure of a weld coarse grained region, and determining a lowest peak temperature Tw and a highest peak temperature Tp meeting the determination criterion; and obtaining the tempering temperature range ?Tw according to the highest peak temperature Tp and the lowest peak temperature Tw of the steel, wherein Tp=Ac1 for some steel.

Abstract: Provided is a preparation method of a graphene electronic heating device, comprising the following steps: (1) depositing a first insulating material on the outer side of an accommodating cavity to obtain a first component; arranging a conductive line on a graphene layer to obtain a second component; (2) installing the second component outside the first component to obtain a third component; (3) depositing a second insulating material on the outer side of the third component to obtain a fourth component; and (4) installing a ceramic tube outside the fourth component, and electrically connecting one or more electrodes to the conductive line to obtain the graphene electronic heating device. The preparation method has simple process, convenient process control and stable product quality, and facilitates to large-scale production.

Abstract: Provided is a method for preparing a cobalt-free layered cathode material by Li+/H+ exchange, including adding a metal sulfate solution, a precipitant solution, and a complexing agent solution dropwise into an aqueous ammonia solution to obtain a mixed solution, and subjecting the mixed solution to precipitation complexation to obtain a hydroxide precursor; and mixing the hydroxide precursor with a lithium source to obtain a mixture, and subjecting the mixture to pre-sintering and crystallization in sequence to obtain the cobalt-free layered cathode material, a temperature for the pre-sintering being less than a temperature for the crystallization, where metal sulfates include at least two selected from the group consisting of non-cobalt transition metal sulfates.

Abstract: Provided is a method for preparing a cobalt-free layered cathode material by Li+/H+ exchange, including adding a metal sulfate solution, a precipitant solution, and a complexing agent solution dropwise into an aqueous ammonia solution to obtain a mixed solution, and subjecting the mixed solution to precipitation complexation to obtain a hydroxide precursor; and mixing the hydroxide precursor with a lithium source to obtain a mixture, and subjecting the mixture to pre-sintering and crystallization in sequence to obtain the cobalt-free layered cathode material, a temperature for the pre-sintering being less than a temperature for the crystallization, where metal sulfates include at least two selected from the group consisting of non-cobalt transition metal sulfates.

Abstract: A vending machine for storing and selling restricted commodities, and a vending method implemented therein. In the vending machine, a control module comprises a processor executing program codes to provide a vending service. A user interface is connected to the control module, comprising a sensor sampling biometric characteristics of a user. A communication module is connected to the control module, comprising a wireless transceiver configured to receive commands from the control module, and communicate with a central system or the user. The control module drives said sensor to capture the biometric characteristics of the user, and then uploads the biometric characteristics to the central system through the communications module. A database storing associations of the biometric characteristics and identity characteristics of users. The control module receives a search result from the database based on the biometric characteristics of the user to determine whether a restricted commodity is authorized for sale.

Abstract: A graphene electronic heating device and a preparation method thereof are provided. The graphene electronic heating device includes a graphene layer, which is used as a heat source for fully heating a to-be-combusted substance in an accommodating cavity, a Teflon layer and a ceramic layer, which are arranged for realizing that the to-be-combusted substance can be continuously and stably combusted in the accommodating cavity without peculiar smell diffusion, and meanwhile increasing the endurance time of the graphene electronic heating device under the equal energy storage; the preparation method has simple process, convenient process control and stable product quality, and facilitates to large-scale production.

Abstract: An optical system, an optical module, and a LiDAR device are provided. The optical system includes: a lens group, arranged sequentially along an optical axis from an object side to an image side; and an optical element, disposed on a transmission optical path of the lens group, the optical element having different focal lengths in a first direction and a second direction; where the first direction and the second direction have an included angle therebetween and are both perpendicular to the optical axis, and a focal length of the optical system in the first direction is different from a focal length of the optical system in the second direction.

Abstract: A method for controlling carbide network in a bearing steel wire rod by controlling cooling and rolling, comprises the following steps: rapidly rolling a bar to a wire rod and spinning it into a loose coil, controlling the rolling temperature at 780° C.-880° C.; and the spinning temperature at 750° C.-850° C.; carrying out on-line controlling cooling of continuous loose coils using EDC water bath austempering cooling process, controlling the cooling rate at 2.0° C./s-10° C./s, and controlling the final cooling temperature within 620-630° C.; after EDC water bath austempering cooling, using slow cooling under a cover, and the temperature is controlled to be 400° C.-500° C. when being removed out of the cover; after slow cooling, collecting coils, and cooling in air to the room temperature.

Abstract: A gas water heater includes a bottom housing having an opening, a burner mounted at the bottom housing, and a cover plate assembly mounted at the bottom housing and covering the opening. The cover plate assembly includes a first cover plate and a second cover plate. The second cover plate is located between the burner and the first cover plate. The cover plate assembly has an air inlet channel located between the first cover plate and the second cover plate. The first cover plate has a first flow inlet in communication with the air inlet channel. The second cover plate has a second flow inlet distant from the first flow inlet, and in communication with the air inlet channel and an air inlet of the burner.

Abstract: An optical device for homogenizing and diffusing light, an emitting terminal and optical system are provided. An implementation of the optical device for homogenizing and diffusing light includes: a microlens array element, the microlens array element homogenizing and diffusing a light beam in a first direction, a second direction, or a first direction and a second direction, to form a homogeneous light beam, wherein the first direction and the second direction are perpendicular to each other.

Abstract: Disclosed is a method for removing impurity mercury from crude selenium. The method includes: mixing a vulcanizing agent with a crude selenium slag that is crushed to not more than 200 mesh uniformly, and performing briquetting to obtain a mixed material; adding the mixed material into a sealed furnace, and subjecting the mixed material to vulcanization by heating under an inert atmosphere to obtain a vulcanized selenium; subjecting the vulcanized selenium to primary vacuum distillation, such that selenium is converted into a gas phase and collected in a form of a volatile, and generated mercury sulfide and valuable elements are enriched in a resulting residue; and subjecting the selenium to secondary distillation to further remove mercury.

Abstract: Provided in the present disclosure are an image projection device, and a method for manufacturing the image projection device. The image projection device comprises: an illumination assembly for emitting a light beam; and a first optical component, which is used for allowing light emitted by the illumination assembly to pass through. The image projection device is characterized in further comprising: a first fastening member, which is arranged on the first optical component; a second optical component, which is used for allowing the light passing through the first optical component to pass through; and a second fastening member, which is arranged on the second optical component and adapted to be fastened to the first fastening member, so as to assemble the first optical component and the second optical component as a whole.