Abstract: A control method and system for collaborative interception by multiple unmanned surface vessels are provided. The method includes obtaining task environment information of each unmanned surface vessel in an unmanned surface vessel group at a current moment, estimating interception point information of the intruding target at the current moment by using a Kalman filter according to the task environment information of the unmanned surface vessels at the current moment, determining process state information of each unmanned surface vessel at the current moment, inputting the process state information of each unmanned surface vessel at the current moment into a corresponding intruding target interception policy output model respectively to obtain an execution action of each unmanned surface vessel at a next moment to intercept the intruding target. The application can intercept the intruding target accurately.

Abstract: The present invention relates to a liquid-state temporary reinforcing material, a preparation method therefor and an application thereof. The liquid-state temporary reinforcing material comprises a reinforcing material and a crystallization inhibitor; the reinforcing material is selected from molecules of any two or more of menthol, menthone, menthol ester and menthol ether, and the content of the crystallization inhibitor is less than 50 ppm. For the liquid-state temporary reinforcing material of the present invention, the menthol and the derivatives of the liquid-state temporary reinforcing material are integrally mixed together to form the composite material for temporary reinforcing, the composite material being liquid and volatilization-controllable at room temperature. Thus, the temporary reinforcing requirements for extracting cultural relics at an archaeology excavation site may be met, and the material is convenient to use.

Abstract: An engineered radioactive polymeric microsphere, and a preparation and application thereof. The preparation method includes: adding a styrene monomer and a disperser and/or a crosslinker into a medium, followed by feeding of nitrogen or helium and stirring to obtain a first reaction mixture; heating the first reaction mixture, and adding an initiator, followed by reaction under stirring at a constant temperature to obtain a second reaction mixture; subjecting the second reaction mixture to washing with ethanol and water, and vacuum drying to obtain a crude polymeric microsphere; subjecting the crude polymeric microsphere to radiation-induced graft polymerization with a functional monomer to obtain the functionalized polymeric microsphere; and exposing the functionalized polymeric microsphere to a radionuclide to prepare the engineered radioactive polymeric microsphere.

Abstract: A multipurpose solution mixer and a use method thereof are provided. The multipurpose solution mixer includes a main control unit, a solution storage unit and a solution blending unit installed in a case; an operation display unit and a liquid outlet provided on the case; and an atomization humidifying unit connected with the liquid outlet, wherein the main control unit is electrically connected with other units; the operation display unit is a display screen with touch operation functions; the solution storage unit includes sealed bottles and infusion tubes; the solution blending unit includes micropumps infusion tubes and a blending chamber, the blending chamber is connected with the atomization humidifying unit via respective infusion tubes, and the operation display unit sends instructions to the main control unit to control the micropumps to extract solutions from the sealed bottles into the blending chamber, and output a mixed solution via the liquid outlet.

Abstract: Disclosed is a vortex-induced vibration-based piezoelectricity and friction nanometer power generation combined energy collector. The energy collector includes a support frame, a piezoelectric plate, a cylinder and a solid-liquid type friction nanometer power generation assembly, wherein the support frame includes a fixed plate, a cantilever plate and a connecting plate which are sequentially connected from top to bottom, the piezoelectric plate is fixed on one side of the cantilever plate, the solid-liquid type friction nanometer power generation assembly has an outer shell, an insulating friction inner shell and a sealing part, the outer shell having two symmetrically arranged induction electrodes, insulating layers are arranged between the butt joint faces of the two induction electrodes, the included angles between the butt joint faces of the two induction electrodes and the plane, provided with the piezoelectric plate, of the cantilever plate are not 90°.

Abstract: A method for rapid reconstruction of a woven composite material microstructure based on topological features is provided. First, geometric modeling is performed according to the topological features of fiber bundles and matrix in a woven composite structure, then the topological features are identified on the basis of a ?-computed tomography (CT) sequence image, the change laws of the features are extracted, and finally, a geometric model is reconstructed to complete the modeling of a microstructure. Compared with the structure modeling method based on weaving process parameters, the consistency between the reconstructed model and a real woven structure is improved, facilitating the improvement of the accuracy of the subsequent calculation of the mechanical properties of the material; and compared with the method for structure reconstruction directly on the basis of a ?CT image, a tedious point cloud data process is simplified and calculation costs are greatly reduced.

Abstract: A horizontally arranged six-degree-of-freedom constant-stiffness mechanism is provided, and includes an upper platform, a bottom plate, three composite spherical hinges, spherical hinges, support rods, guide rail slider assemblies, and six electromagnetic adjustable stiffness units. Two ends of a shaft on which a permanent magnet is fixed in each electromagnetic adjustable stiffness unit are fixed to the bottom plate via shaft supports. Axially moving housings of electromagnetic adjustable stiffness units are fixed on sliders of the guide rail slider assemblies via slider backing plates respectively. Guide rail slider assembles are fixed on the bottom plate. Tops of the housings are mounted with the spherical hinges respectively. A bottom of the upper platform is uniformly mounted with the composite spherical hinges. One end of each support rod is threadedly connected to a corresponding one of the spherical hinges, and another end is connected with a corresponding one of composite spherical hinges.

Abstract: A squeeze mode giant electrorheological fluid damper is disclosed. The squeeze mode giant electrorheological fluid damper comprises a support, a container and a connecting structure, wherein the support comprises a bottom plate, guide shafts and a top plate, the guide shaft is vertically fixed on the bottom plate, and the top plate is slidably arranged on the guide shaft; the container comprises a container body and two spiral spring pieces coaxially arranged in the container body, the container body is fixed on the bottom plate, the bottoms of the two spiral spring pieces are fixed to the bottom of the container, the two spiral spring pieces are not in contact with each other and are spaced by 180°; the top of the connecting structure is fixedly connected with the top plate, and the bottom of the connecting structure is fixedly connected with the tops of the two spiral spring pieces.

Abstract: A spatial series-parallel pelvic fracture reduction robot includes a base support, a mobile platform module, an arc-shaped guide rail platform module, a robot module, and a pelvic external fixator which are connected in sequence. The mobile platform module is fixedly connected on an upper part of the base support and is used for driving the arc-shaped guide rail platform module to linearly translate up and down and left and right; a connecting sliding block of the arc-shaped guide rail platform module is connected to the robot module and used for enabling the robot module to move along an arc-shaped guide rail; the robot module includes a robot and a clamping mechanism, the robot is used for adjusting a spatial pose of the clamping mechanism, and the clamping mechanism is used for fixing bone needles; the pelvic external fixator is used for firmly fixing the pelvis.

Abstract: The present disclosure provides a method and system for path planning of an unmanned vehicle in a three-dimensional terrain and relates to the technical field of path planning. The method includes building a random tree with an initial point of a to-be-planned path as a node; generating a random node based on a goal bias strategy and a multi-sampling strategy; determining a node in the random tree and with a minimum two-dimensional distance from the random node as a nearest node; determining a direction from the nearest node to the random node as an extension direction; determining a point corresponding to a preset step length as a to-be-determined node in the extension direction with the nearest node as a starting point; and updating the random tree or determining a path cut-off random tree through elevation detection and path search cut-off detection, so as to determine the to-be-planned path.

Abstract: The present disclosure relates to the field of display technology, and provides an inkjet assembly, an inkjet printing apparatus and an inkjet printing method. The inkjet assembly includes at least one jet printing member having a first surface on which an inkjet port is formed. The inkjet assembly further includes a deflection member configured to provide a deflection force to a fluid emitted from the inkjet port and a control member configured to control operation of the deflection member.

Abstract: Disclosed is a real-time dynamic and quantitative detection device for carbon dioxide in human exhaled air, which comprises: a face mask which comprises an air inlet and an air outlet; an inhalation channel connected with the air inlet of the face mask, a first one-way valve is provided in the inhalation channel; an exhalation channel connected with the air outlet of the face mask, a second one-way valve is provided in the exhalation channel; an air path switching element connected with the exhalation channel to realize the switching between an exhalation air path to be detected and an inflation air path; a detection air chamber connected with the exhalation channel, at least one carbon dioxide sensor connected with an external upper computer is provided in the detection air chamber; before detection, the air path switching element switches to the inflation air path to clean and initialize the detection air chamber; during detection, the air path switching element switches to the exhalation air path to be det

Abstract: A wheel-legged amphibious mobile robot with a variable attack angle, which belongs to the technical field of robot structure technology. The robot includes three parts: motion unit, body trunk and power unit. As a key structure, the motion unit mainly includes a moving mechanism, a wheel assembly, a telescopic mechanism and a transmission device. The robot drives the telescopic mechanism to reciprocate linearly through a gear and rack set, and pushes “legs” to expand and retract, so as to realize a mutual switching between a wheeled mode and a gait mode. Under transmission of bevel gear set, the blades can rotate at any same angle at the same time, to change the attack angle and realize the steering. The robot provided by the present disclosure can effectively adapt to a complex and harsh amphibious environment, and meet a series of operation requirements such as rapid movement, obstacle climbing, underwater steering.

Abstract: A tumor stroma imaging agent with a chemical structural formula (I): is provided, where R is hydrogen or fluorine. Compared with the prior art, the tumor stroma imaging agent exhibits significant affinity for fibroblast activation protein (FAP), high uptake for a malignant tumor with high FAP expression in a tumor stroma, and high sensitivity and specificity for the diagnosis of a malignant tumor, and is not prone to false positives. Therefore, the tumor stroma imaging agent can be effectively and safely used for the diagnosis and treatment of various malignant tumors with a prolonged half-life and an extended window period, which is conducive to clinical application.

Abstract: The present disclosure relates to a signal conditioning system for improving low-frequency measurement performance of an acceleration sensor. The signal conditioning system includes: a charge integration circuit, a high-pass filter circuit, a lead-lag network, an anti-aliasing filter circuit, and a gain adjustment circuit. An input terminal of the charge integration circuit is connected to the acceleration sensor, an output terminal of the charge integration circuit is connected to an input terminal of the high-pass filter circuit, an output terminal of the high-pass filter circuit is connected to an input terminal of the lead-lag network, an output terminal of the lead-lag network is connected to an input terminal of the anti-aliasing filter circuit, and an output terminal of the anti-aliasing filter circuit is connected to an input terminal of the gain adjustment circuit.

Abstract: A reactor temperature measurement system includes a Fiber Bragg Grating sensor array arranged in a body of the reactor for monitoring temperatures at multiple positions in an axial direction of the body to obtain temperature sensing optical signals; and a fiber grating demodulator, connected to the Fiber Bragg Grating sensor array, and used to demodulate the temperature sensing optical signals. A method for preparing a Fiber Bragg Grating includes preparing a Fiber Bragg Grating by using a single-mode fiber and annealing the Fiber Bragg Grating, which includes heating the Fiber Bragg Grating to a temperature above 400° C. and maintaining for 100 to 200 hours.

Abstract: A magnetic suspension type sensing system for space full-degree-of-freedom absolute poses is provided. The system includes a reference platform, multiple quasi-zero stiffness supporting legs and a platform to be tested. The reference platform and the platform to be tested are connected in a spherical hinge mode through the multiple quasi-zero stiffness supporting legs. Each of the multiple quasi-zero stiffness supporting legs includes a lower end spherical hinge, a lower end cover, a positive stiffness unit, a negative stiffness unit, a shaft, a lower end shell, an upper end shell and an upper end spherical hinge.

Abstract: The present invention discloses a method for detecting a microstructure of a functionally graded material based on digital acousto-optic holography, including the following steps: excite a sample with an ultrasonic wave; record a light wave; form a single tomographic acousto-optic hologram; perform numerical reconstruction of phase information, and perform global detection. The present invention uses an acoustic-optic modulation device to modulate a laser light source of a laser of a laser device to form two light waves of different frequencies. The two light waves each constitute a Mach-Zehnder interference system to record reflection wave information and transmission wave information of an ultrasound, and are finally combined and recorded in the same hologram to form the single tomographic acousto-optic hologram.

Abstract: The present disclosure belongs to the technical field of biomedicine, and provides use of Faecalibacterium prausnitzii in preparation of a medicine for treating pathological ventricular remodeling and/or heart failure following myocardial infarction. The Faecalibacterium prausnitzii can improve pathological ventricular remodeling and/or heart failure caused by myocardial infarction in experimental animals, resume the systolic function, reduce the cardiac fibrosis, and inhibit the pathological myocardial hypertrophy of mice with myocardial infarction. Furthermore, the inactivated Faecalibacterium prausnitzii has no such improvement effect.

Abstract: The present disclosure relates to the field of directional solidification, and in particular, to an apparatus, method, and process for directional solidification by liquid metal spraying enhanced cooling (LMSC). The process has the following beneficial effects: the apparatus of the present disclosure can regulate a solidification structure of a casting, refine a dendrite spacing, and reduce or avoid metallurgical defects, and can be used to prepare high-quality large-sized columnar/single crystal blades or other castings.