Abstract: A method for pretreatment of a biological sample for radionuclides measurement using gamma-spectroscopy includes the following steps: (1) subjecting the biological sample to washing, air-drying for surface water removal, and weighing to obtain a clean and dry sample, and grinding and pulping the clean and dry sample or cutting the clean and dry sample into sections to obtain a sample pulp or sample sections; (2) spraying the sample pulp or sample sections with liquid nitrogen for quick-freezing to obtain a frozen sample; (3) transferring the frozen sample into a vacuum lyophilizer, and lyophilizing the frozen sample to obtain a lyophilized sample; (4) collecting, weighing, grinding, and sieving the lyophilized sample to obtain a biological lyophilized powder; and (5) filling the biological lyophilized powder into a weighed sample box, tamping or compacting, sealing, and weighing to obtain a to-be-measured sample for the radionuclide measurement using gamma-spectroscopy.

Abstract: A heterojunction battery and a preparation method therefor are provided. The heterojunction battery includes a crystalline silicon layer, a first intrinsic amorphous silicon layer, an N-type doped microcrystalline silicon layer, a first transparent conductive layer, and a first metal electrode are sequentially arranged on a front surface of the crystalline silicon layer from inside to outside, and a second intrinsic amorphous silicon layer, a P-type doped microcrystalline silicon layer, a second transparent conductive layer, and a second metal electrode are sequentially arranged on a back surface of the crystalline silicon layer from inside to outside. A local reduction layer is formed on a surface of the first transparent conductive layer that is under the first metal electrode and/or on a surface of the second transparent conductive layer that is under the second metal electrode.

Abstract: A ductile material, a method for manufacturing a ductile member, and an anti-collision device for bridge piers, wherein the ductile material includes specific components in parts by mass as follows: 50-62 parts of thermoplastic polyurethane, 11-33 parts of neodymium-iron-boron, 12-24 parts of nickel-titanium alloy, 2-3 parts of metal magnetic powder, and 1-2 parts of polypropylene or polyethylene or polylactic acid or polyetheretherketone. The use of the ductile material, the method for manufacturing a ductile member, and the anti-collision device for bridge piers facilitates navigation.

Abstract: The present disclosure provides a vascular graft comprising i) one or more extracellular matrix compositions and ii) one or more hydrogels. In particular, the vascular grafts of the present disclosure can be functionalized and/or be completely biologic. The disclosure also provides methods of administering the vascular grafts as well as methods for forming the vascular grafts.

Abstract: An apparatus for high yield foaming of coffee has a pressure control mechanism, a gas pressure source, a water reservoir and a back pressure resonance mechanism, wherein a coffee outlet is arranged at a lower part of the back pressure resonance mechanism. When a button is pressed, water having a controlled water pressure enters a coffee placement cavity to be mixed with the coffee and extracted. One resonance needle and a colloid ring constitute a resonance cavity. When pressed coffee slurry passes through the resonance cavity, due to the pressed coffee slurry and a special structure of the resonance cavity, the coffee slurry is sufficiently foamed after high-frequency oscillation and flows out of the coffee outlet.

Abstract: A superhydrophobic self-luminous concrete material for 3D printing and a method for preparing the same, belonging to the field of building materials. The superhydrophobic self-luminous concrete includes: cement: 1000-1500 parts; quartz sand: 1000-1300 parts; silica fume: 50-100 parts; water: 300-400 parts; water reducing agent: 8-12 parts; cellulose ether: 1-2 parts; defoamer: 2-3 parts; fiber: 4-8 parts; luminous powder: 75-85 parts; reflective powder: 30-45 parts; metakaolin: 15-25 parts; metal filler: 0.015-0.040 parts; and a superhydrophobic coating. By combining 3D printing with the superhydrophobic self-luminous concrete material, the characteristics of energy saving, environment friendliness, high efficiency and low consumption of the 3D printing are highlighted, and the superhydrophobic self-luminous concrete material can be utilized to efficiently prepare fine and special-shaped components.

Abstract: An optical construction (100) includes a lightguide (102), a transmissive reflector (112), and an optical sensor (114). The lightguide (102) includes a first major surface (104) and a second major surface (106) opposite to the first major surface (104). The first major surface (104) includes a first portion (108) and an adjoining second portion (110). The transmissive reflector (112) is disposed adjacent to the first major surface (104) of the lightguide (102). The optical sensor (114) is disposed adjacent to the transmissive reflector (112) opposite to the lightguide (102). The optical sensor (114) is aligned with the first portion (108) of the first major surface (104) of the lightguide (102), such that the optical sensor (114) receives at least a portion of light passing through the first portion (108) of the first major surface (104) and transmitted by the transmissive reflector (112).

Abstract: The present invention relates to apparatuses for use in electrophoretic separation of macromolecules and/or cells.

Abstract: An overtemperature protection circuit used for a switching power supply having a power switch includes a control circuit coupled to the power switch and configured to control, by a control terminal, on and off of the power switch, the control circuit having a sampling terminal for sampling a demagnetization signal of the switching power supply; and a temperature measurement circuit coupled between the control terminal and the sampling terminal. While the power switch is on, the control circuit clamps voltages at the control terminal and the sampling terminal to form a potential difference, thereby performing overtemperature protection of the switching power supply by a change in a current flowing through the temperature measurement circuit. While the power switch is off, a direction of a current flowing through the temperature measurement circuit is unidirectional from the control terminal to the sampling terminal.

Abstract: A ground rail transfer device includes: a support rail provided on the ground and used for unloading a vertical load of a bogie in a rail vehicle; a guide rail provided on the ground and used for driving the bogie to perform a rail transfer operation; and a transition plate provided on the ground and located between a first rail and a second rail which are different in a gauge; wherein a difference between the top surface height of the transition plate and the top surface height of the first rail is equal to a distance between a wheel rim vertex circle and a wheel tread of the rail vehicle.

Abstract: A method of making an optical device. The method comprises providing a semiconductor wafer, providing an array of emitters located on a first side of the wafer and providing one or more optical components on a second, opposite side of the wafer, wherein the or each optical component is arranged to split light from an associated emitter of the array of emitters. The method further comprises emitting light with the associated emitter, receiving light emitted by the associated emitter and transmitted through the optical component on the second side of the wafer, and determining an alignment between the one or more optical components and the array of emitters from the received light.

Abstract: The rotation shaft structure includes a main shaft assembly, and two folding assemblies that are symmetrically disposed with respect to the main shaft assembly. The two folding assemblies may rotate toward or against each other relative to the main shaft assembly. When the folding assembly is specifically disposed, the folding assembly includes a rotation assembly, a support plate, and a housing mounting bracket. The rotation assembly is rotationally connected to the main shaft assembly. The support plate is rotationally connected to the housing mounting bracket and slidably connected to the rotation assembly.

Abstract: An automatic locking device for assembling a part to a workpiece is provided. The device includes a feeding mechanism, a fixture mechanism, a loading and unloading mechanism, a lifting mechanism, a rotating mechanism, and a locking mechanism. The feeding mechanism feeds the part to the fixture mechanism. The loading and unloading mechanism places the workpiece on the part. The lifting mechanism lifts up the fixture mechanism together with the part and the workpiece. The rotating mechanism rotates the fixture mechanism. The locking mechanism locks the part to the workpiece after the part and the workpiece are rotated by the rotating mechanism. The automatic locking device integrates multiple functions in a single station, reduces the number of the work stations and operatives, lowers the cost, and improves accuracy of the assembly. An assembling apparatus including the automatic locking device is also provided.

Abstract: This application provides a rotation shaft structure and an electronic device. The rotation shaft structure includes a main shaft assembly, and two folding assemblies. The folding assembly includes a rotation assembly, a support plate, and a housing mounting bracket. The rotation assembly is rotationally connected to the main shaft assembly. The support plate is rotationally connected to the housing mounting bracket and slidably connected to the rotation assembly. When two housing mounting brackets rotate toward each other, two support plates rotate in a same direction relative to the housing mounting brackets on corresponding sides, so that the two support plates and the main shaft assembly can form a triangle-like display accommodation space. When the electronic device is in a closed state, the display accommodation space can be used for accommodating a bent portion of the flexible display, so that the flexible display is not damaged by extrusion.

Abstract: An article for a display device having an output surface. The article includes a light valve, a reflective polarizer, and a diffusing layer. The light valve is configured to be disposed on the output surface of the display device. The light valve is operable in a pass mode and a block mode. The reflective polarizer is disposed on the light valve opposite to the display device. The reflective polarizer is configured to substantially transmit light having a first polarization state and substantially reflect light having an orthogonal second polarization state. The diffusing layer is disposed on the reflective polarizer opposite to the light valve.

Abstract: The present disclosure provides a photonics-aided vector terahertz signal communication system. The system includes an optical frequency comb generation module, a vector terahertz signal generation module, an optical fiber transmission module, a vector terahertz signal detection module, and a vector terahertz signal emission module that are sequentially connected, where the vector terahertz signal generation module includes a first binary sequence generator, a first electronic amplifier, and a first intensity modulator that are sequentially connected, the first binary sequence generator generates binary data representing to-be-transmitted data, the first intensity modulator performs, based on the binary data, amplitude modulation on an optical frequency comb entering the first intensity modulator, and an optical signal obtained after the modulation of the first intensity modulator is a vector terahertz signal carrying the to-be-transmitted data.

Abstract: An autonomous vehicle longitudinal-and-lateral control method for preventing motion sickness is disclosed. Firstly, a vehicle dynamics model is established, and the current vehicle travelling state and road surface information are determined according to the vehicle dynamics model. After the vehicle travelling state and road surface information are acquired, the desired velocity, desired acceleration, and desired wheel turning angle are output according to a driver model for reducing occurrence of motion sickness while ensuring safety and efficiency, to carry out longitudinal-and-lateral control of the vehicle.

Abstract: A system and method for securely defensing against a collusion attack under Internet of Vehicles (IoV) are provided. The present disclosure can repair a vulnerability, of a reputation system in the IoV, that the IOC attackers can manipulate a traffic-related message aggregation model (TMAM) by increasing their own reputation scores in an inside-and-outside collusion (IOC) manner. In addition, the present disclosure can detect IOC attacks quickly to improve the security of the IoV; can eliminate suspicious providers recursively and provide a reputation fluctuation association rule, to avoid overload of the TMAM; and can deprive IOC attackers of the opportunity to improve their reputation scores and ensure credible information in the IoV, to ensure the fairness and availability of the TMAM without the interference from the IOC attackers.

Abstract: A system for generating and receiving a polarization multiplexed single sideband signal is provided, which includes a light wave generating unit connected with a signal modulating unit and configured to generate a light wave; a driving signal generating unit connected with the signal modulating unit and configured to generate a driving signal; the signal modulating unit configured to split the light wave into two orthogonal polarized light waves, and modulate the driving signal on the polarized light waves to obtain a polarization multiplexed upper sideband optical signal and a polarization multiplexed lower sideband optical signal which are coupled to output a mixed signal, the mixed signal is transmitted to a separating and converting unit to obtain electrical millimeter wave signals; the electrical millimeter wave signals are transmitted through an MIMO wireless link to a signal sampling and processing unit to be converted into digital signals for digital signal processing.

Abstract: The present disclosure is generally directed to lighting systems that enhance the distribution of light. As set forth herein, the disclosed embodiments can include a lighting device, such as a strip of light emitting diodes (LEDs) and an asymmetric total internal reflection (TIR) lens.