Abstract: A system for medical imaging quality control and organ phenotype extraction is provided. A topological relationship tree of organ phenotypes is constructed according to association of anatomical structures between various organ phenotypic characteristics in a medical image, and a structural association graph of organ phenotypes in the medical image is determined; a semantic structure graph of medical entities in a text report is determined through a logical association relationship between the medical entities and a contextual relationship of clinical description statements in the text report; node-level alignment and fusion are performed on the structural association graph and the semantic structure graph of medical entities to obtain an organ-entity characteristic association map; medical imaging data is quality-controlled based on the characteristic association map, and a quality control warning is output if it is determined that the medical imaging data has an imaging quality anomaly.

Abstract: An analog-front-end device is provided, which includes, a phase-locked loop, a first register, an analog-to-digital converter, and a controller. The phase-locked loop is activated based on a clock enable signal to generate a clock signal. The first register stores first data related to the analog signal based on the clock signal. The analog-to-digital converter converts the analog signal to the first data based on the clock signal. The controller determines whether the phase-locked loop is activated based on a flag to generate the clock enable signal, and operates in a sampling mode based on a first instruction. When the controller operates in the sampling mode, the controller activates the phase-locked loop using the clock enable signal. When the controller exits the sampling mode, the controller deactivates the phase-locked loop.

Abstract: An electronic device includes a processing unit and a plurality of integrated circuit units. The processing unit is configured to provide a register configuration in sequence. The integrated circuit units are configured to receive the register configuration in sequence. After all of the integrated circuit units have received the register configuration, the processing unit is configured to provide a sync signal to the integrated circuit units in parallel, or the last of the integrated circuit units is configured to provide the sync signal to the integrated circuit units in parallel. The integrated circuit units perform synchronization according to the sync signal.

Abstract: Provided is a dynamic-static unified loading path design method for a true triaxial mechanical test. Loading path design is carried out in a stress space, and a principal stress space is cut into a series of stress meridian plane spaces, thereby transforming a three-dimensional design environment into a two-dimensional design environment; and a design result in the two-dimensional design environment is converted back into a final three-dimensional design result. Distribution of dynamic-static true triaxial mechanical test loading paths within the stress space is designed according to requirements.

Abstract: The invention provides a test method for quantitatively studying a stress wave propagation law of a porous rock, which adopts a dynamic true triaxial electromagnetic Hopkinson bar test system for testing. The test method comprises: quantitatively designing and preparing a cubic porous rock sample required by testing; placing the cubic pore rock sample in a central cubic square chest; and quantitatively studying a high-amplitude stress wave propagation law of the porous rock on the cubic porous rock sample by adopting the dynamic true triaxial electromagnetic Hopkinson bar test system.

Abstract: Provided is a fixture applied to sticking a strain gauge on a Hopkinson square bar and a use method of the fixture. The invention is specially designed for a square waveguide bar, and the fixture further ensures consistency of the same group of strain gauges along a cross-section position of the bar. The fixture has important practical value in application in a dynamic true triaxial electromagnetic Hopkinson bar test, especially in a high-end material testing field requiring high-precision and high-reliability test data.

Abstract: Provided are an energy absorbing and buffering device applied to a dynamic true triaxial electromagnetic Hopkinson bar and a testing and using method thereof. The device comprises an energy absorbing and buffering ring, an exhaust pipe and an inert gas storage bin. According to the testing and using method, the energy absorbing and buffering device is utilized and connected with a waveguide bar through a middle hollow structure; and a rear end of the energy absorbing and buffering ring is tightly attached to a baffle at a confining pressure loading end. The energy absorbing and buffering device provides energy absorbing and buffering for the waveguide bar, which prolongs a service life of the waveguide bar under an impact load.

Abstract: Provided are an energy absorbing and buffering device applied to a dynamic true triaxial electromagnetic Hopkinson bar and a testing and using method thereof. The device comprises an energy absorbing and buffering ring, an exhaust pipe and an inert gas storage bin. According to the testing and using method, the energy absorbing and buffering device is utilized and connected with a waveguide bar through a middle hollow structure; and a rear end of the energy absorbing and buffering ring is tightly attached to a baffle at a confining pressure loading end. The energy absorbing and buffering device provides energy absorbing and buffering for the waveguide bar, which prolongs a service life of the waveguide bar under an impact load.

Abstract: A system for determining dental caries in a patient's tooth, the system including a dental tray including a curved channel configured to be placed on the patient's teeth on the patient's lower jaw or below the patient's teeth on the patient's upper jaw, the channel includes a length, two side walls and a middle wall connecting the two side walls, and a U-shaped excitation-detection transducer defined by two side portions and a middle portion connecting the two side portions, the transducer configured to be supported on and slidingly coupled with the channel with a shape of the transducer conforming to a cross-sectional periphery of the channel, the transducer selectively positioned over a portion of the channel over the patient's tooth, wherein the transducer is used to excite surface acoustic waves (SAWs) in the tooth and to receive SAWs in the patient's tooth.

Abstract: Provided is a dynamic true triaxial electromagnetic Hopkinson bar leveling and centering system and method. The system comprises a supporting base, a micrometer adjusting knob, a sliding platform, an auxiliary supporting plate, a fixing groove, at least two auxiliary centering targets and a lamp source. According to the auxiliary centering system, a principle that light rays are straight lines and two points form one line is adopted, and adjacent perpendicularity and coaxial centering leveling of a bar piece are determined by respectively adjusting a center of a loading end surface of the bar piece and an upper surface of the bar piece.

Abstract: Provided is a stress blank angle eliminating device and method for a dynamic true triaxial electromagnetic Hopkinson bar. Objectives of eliminating influence of a stress blank angle in a sample in a test and preventing permanent deformation caused by mutual collision between the Hopkinson bars are achieved. The adjustable test device for eliminating the stress blank angle eliminates influence of the stress blank angle generated by the sample in a triaxial six-direction dynamic impact test process, and is convenient for obtaining real dynamic failure parameters of the sample.

Abstract: The invention discloses an integrated deep purification device for removing sulfur, nitrate, dust and fluorine. The core component of the device is a purification system; the purification system comprises a headstock, a container and a purification system which are connected with the back of the headstock, and the purification system is arranged in the container, and comprises a purification tower I and a purification tower II, wherein the purification tower I comprises a tower body I, corona electrodes I and conductive filters; the purification tower II comprises a tower body II, corona electrodes II, a sprinkler system and electrofiltration coupling units.