Abstract: A secondary electron probe is provided. The secondary electron probe comprises a porous carbon material layer. The porous carbon material layer consists of a plurality of carbon material particles and a plurality of micro gaps, the plurality of micro gaps are located between the plurality of carbon material particles. The porous carbon material layer is an electronic blackbody. A secondary electron detector and a scanning electron microscope probe using the secondary electron probe are also provided.

Abstract: The present disclosure provides a method and apparatus for detecting a dose distribution of an article. The method includes performing a fluoroscopy scanning on the article to be detected, to obtain mass data per unit area or unit volume for each point of the article to be detected; obtaining corresponding dose distribution data based on the mass data per unit area or unit volume and a preset mapping model, wherein the preset mapping model includes a mapping relationship between mass per unit area or unit volume and the dose distribution of the article under irradiation of a preset amount of energy; and matching the dose distribution data with a fluoroscopy image of the article to be detected, to generate and display a radiation image.

Abstract: A generator and a method for generating far infrared polarized light are related. The generator includes a far infrared light source configured to emit a far infrared light; a polarizer located on a light emitting surface of the far infrared light source, wherein the polarizer includes a carbon nanotube structure including a plurality of carbon nanotubes arranged substantially along the same direction, and the far infrared light passes through the polarizer to form a far infrared polarized light; and a heater configured to heat the carbon nanotube structure. The method includes allowing the far infrared to pass through the carbon nanotube structure and heating the carbon nanotube structure as the far infrared passes through the carbon nanotube structure.

Abstract: The present application relates to a safety prevention and control system and control method of a power battery pack for an electric vehicle. The safety prevention and control system of a power battery pack includes a signal acquisition device, a main controller, and a step-by-step prevention and control execution device. The main controller includes a fault diagnosis device, a cell thermal runaway determination device and a battery pack thermal runaway propagation determination device, which are respectively electrically connected to the step-by-step prevention and control execution device to send different control instructions to the step-by-step prevention and control execution device. The step-by-step prevention and control execution device can execute prevention and control actions of different levels according to the different control instructions sent by the fault diagnosis device, the cell thermal runaway determination device and the battery pack thermal runaway propagation determination device.

Abstract: A method for preparing a reference electrode and a lithium ion battery with a reference electrode. In some embodiments, a method includes the following steps: welding a reference electrode substrate to a lower portion of a current collector metal sheet with a tab-film; melting metal lithium into a liquid state; immersing a lower portion of the reference electrode substrate welded with the current collector metal sheet into the liquid lithium; coating a lower portion of the tab-film with a layer of separator to obtain a reference electrode with a separator coating; inserting the reference electrode between a separator of a core of a lithium ion battery and an anode piece; and packaging in plastic the lithium ion battery implanted with the reference electrode to obtain the lithium ion battery with the reference electrode.

Abstract: A resistive random access memory and a manufacture method thereof are provided. The resistive random access memory includes: a first electrode, a second electrode, a resistive layer between the first electrode and the second electrode, and at least one thermal enhanced layer; the thermal enhanced layer is adjacent to the resistive layer, and a thermal conductivity of the thermal enhanced layer is less than a thermal conductivity of the first electrode and a thermal conductivity of the second electrode.

Abstract: The present disclosure provides a trace detection device. The trace detection device includes: a box body comprising a main body frame and a top plate, the top plate and the main body frame forming a fully enclosed cavity; an ion migration tube assembly in the cavity and on a first side of the cavity; and a preamplifier and high voltage circuit board in the cavity and on a second side of the cavity, the second side being opposite to the first side.

Abstract: A freeform concave grating imaging spectrometer includes a slit, a freeform concave grating, and an image surface. The lights incident from the slit is irradiated on the freeform concave grating to be dispersed and reflected, to form a reflected light beam. The reflected light beam is irradiated on the image surface, so that the lights of different wavelengths incident from the slit are separated and imaged on the image surface.

Abstract: Disclosed are calibration assembly and calibration method of calibrating geometric parameters of a CT apparatus. The calibration assembly includes at least one calibration unit each including a plurality of calibration wires, and the plurality of calibration wires are arranged regularly in a same plane. The calibration assembly is easy to be processed and can be used to calibrate geometric parameters of a CT apparatus, and the calibration operations are simple and easy to be implemented.

Abstract: A decorative ring includes a body having a hollow tubular structure and defining a body space. A plurality of electrical energy generating elements is located in the body space and spaced apart from each other. The body space is divided into a plurality of sub-body spaces separated from each other. Each of plurality of electrical energy generating elements includes a first porous electrode, an eggshell membrane, and a second porous electrode stacked on each other in that order. A light emitting element is located on the body and electrically connected to one of the plurality of electrical energy generating elements. A liquid having positive ions and negative ions in the body space.

Abstract: An arrayed X-ray source and an X-ray imaging apparatus are described. An example X-ray source includes a housing and X-ray generators located in the housing. The X-ray generators are arranged in an array. The X-ray generators are provided separately from each other and configured to emit X-rays independently of each other.

Abstract: A pressure-adjustable auxiliary control system for high-pressure gas sealing detection includes: a high-pressure chamber environment monitoring unit configured to construct high-pressure test gas sealing environment and to test sealing performance of a sealing member; a first gas pipeline divided into two branches, of which one branch is connected to the high-pressure chamber environment monitoring unit as a first gas replacement path; a second gas pipeline which is connected to a test gas pressurization path together with the other branch of the first gas pipeline, where a first booster pump processing unit and a second booster pump processing unit are sequentially arranged in the test gas pressurization path for pressurizing the test gas, and are connected to the high-pressure chamber environment monitoring unit; a system air control module configured for control of respective air control valves; and a booster pump air control module and a driving air source preprocessing unit.

Abstract: An device for detecting electron beam comprises a porous carbon material layer, a Faraday cup and an image display. The porous carbon material layer comprises a plurality of carbon material particles and a first through hole. A plurality of micro gaps exist between the plurality of carbon material particles. A cross-sectional area of the first through hole is less than or equal to a cross-sectional area of the electron beam. The Faraday cup is under the porous carbon material layer and comprises an opening. The opening and the first through hole penetrate with each other. The image display is electrically connected to the porous carbon material layer and configured to form an image with different colors according to charge generated in the porous carbon material layer. A method for detecting electron beam using the device for detecting electron beam is also provided.

Abstract: A method of making a stretchable film structure is provided. An elastic substrate is pre-stretched in a first direction and a second direction to obtain a pre-stretched elastic substrate. A carbon nanotube film structure is laid on a surface of the pre-stretched elastic substrate. The carbon nanotube film structure comprises a plurality of super-aligned carbon nanotube films stacked with each other. The pre-stretching the elastic substrate is removed and a plurality of wrinkles is formed on a surface of the carbon nanotube film structure to form the stretchable film structure. The present disclosure also relates to the stretchable film structure obtained by the above method.

Abstract: The present disclosure relates to a carbon nanotube structure. The carbon nanotube structure includes a carbon nanotube array, a carbon nanotube layer located on the carbon nanotube array, and a carbon nanotube cluster between the carbon nanotube array and the carbon nanotube layer. The carbon nanotube array includes a number of first carbon nanotubes that are parallel with each other. The carbon nanotube layer includes a number of second carbon nanotubes. The carbon nanotube cluster includes a plurality of third carbon nanotubes that are entangled around both the plurality of first carbon nanotubes and the plurality of second carbon nanotubes. The carbon nanotube array is fixed on the carbon nanotube layer by the plurality of third carbon nanotubes so that the entire carbon nanotube structure is free-standing.

Abstract: An aluminum matrix composite is provided. The aluminum matrix composite comprises at least one reinforcement layer and an aluminum layer. The at least one reinforcement layer comprises a plurality of reinforcement sheets. The plurality of reinforcement sheets are uniformly dispersed in at least a portion of the aluminum layer.

Abstract: The present invention provides a method for fabricating patterned cellulose nanocrystal (CNC) composite nanofibers and thin films for optical and electromagnetic sensor and actuator application, comprising the following steps of: selecting materials for fabricating patterned cellulose nanocrystal (CNC) composite nanofibers; and fabricating patterned CNCs composite nanofibers by incorporating secondary phases either during electrospinning or post-processing, wherein the secondary phases may include dielectrics, electrically or magnetically activated nanoparticles or polymers and biological cells in mechanically reinforced by CNCs.

Abstract: A method and a system of multi-directional scene text recognition based on multi-element attention mechanism are provided. The method includes: performing normalization processing for a text row/column image I output from an external text detection module by a feature extractor, extracting a feature for the normalized image by using a deep convolutional neural network to acquire an initial feature map F0, and adding a 2-dimensional directional positional encoding P to an initial feature map F0 in order to output a multi-channel feature map F; converting the multi-channel feature map F output from a feature extractor by an encoder into a hidden representation H; and converting the hidden representation H output from the encoder into a recognized text by a decoder and using the recognized text as the output result.

Abstract: A device for measuring a secondary electron emission coefficient comprises a scanning electron microscope, a first collecting plate, a second collecting plate, a first galvanometer, a second galvanometer, a voltmeter, and a Faraday cup. The scanning electron microscope comprises an electron emitter and a chamber. A sample is located between the first collecting plate and the second collecting plate. The first galvanometer is used to test a current intensity of electrons escaping from the sample and hitting the first collecting plate and the second collecting plate. A high-energy electron beam emitted by the electron emitter passes through the first collecting plate and the second collecting plate, and enters the Faraday cup. The second galvanometer is used to test a current intensity of electrons entering the Faraday cup.

Abstract: The present disclosure provides a fluid-optical encryption system and a method thereof. The fluid-optical encryption system uses a fluid surface that changes topology over time to modulate the wave front of an electromagnetic signal in an encryption, decryption, authentication or other communication system. The electromagnetic signal can be pulsed or continuous, coherent or non-coherent, and can be optical or in another wavelength range such as micrometer or infrared. The information carrying signal is either transmitted through the fluid system or reflected off the surface of the fluid system. The fluid system time dependent change can be induced by mechanical vibration in the fluid container, distorting the fluid container, acoustic waves through the fluid, or by surface tension changes at the boundary of the fluid cause by electrowetting or electrostatic effects. The fluid surface can exhibit patterns that oscillate or change periodically, or change in a chaotic manner.