Abstract: A quantum-dot-based measuring system is disclosed. The quantum-dot-based measuring system includes a laser to emit excitation light, an optical fiber probe including a tail end and a tapered tip, and the tapered tip of the optical fiber probe is attached with one or more quantum dots, and the excitation light is injected from the tail end of the optical fiber probe and emitted from the tapered tip to a sample to be detected, an objective lens to collect optical signal reflected by the sample and a spectrometer to receive the optical signal.

Abstract: Arginine deiminase (ADI)-containing genetically engineered Corynebacterium glutamicum (C. glutamicum), a fusion protein cipA-arc, use thereof, and a method for preparing [14/15N]-L-citrulline through enzymatic catalysis are provided. The ADI-containing genetically engineered Corynebacterium glutamicum (C. glutamicum) has a deposit number of CGMCC No. 19404, which expresses a fusion protein cipA-arc. Both the genetically engineered strain and the fusion protein cipA-arc can be used to convert [14/15N]-L-arginine into [14/15N]-L-citrulline.

Abstract: The present invention discloses a composite device for high-precision laser additive/subtractive manufacturing, which consists of a sealed shaping chamber, an inert protective gas source and a machine-shaping platform; wherein, the inert protective gas source is connected to the sealed shaping chamber; and the machine-shaping platform is arranged in the sealed shaping chamber, as well as there is a light path selection system is arranged right above the machine-shaping platform; in addition, there is a machining position is equipped on the machine-shaping platform, meanwhile, there are lead screws are arranged under the machine-shaping platform.

Abstract: A laser-solid-forming manufacturing device includes a laser emitter, a magnetic field generator, and a forming platform. The laser emitter emits a laser beam which acts on a feedstock to form a molten pool. The magnetic field generator includes a spiral copper coil, a first electrode and a second electrode. The spiral copper coil is formed by spirally winding a copper tube. The first and second electrodes are arranged at respective ends of the copper tube and are used for loading a voltage to generate a magnetic field in the spiral copper coil. At any time, the spiral copper coil sleeves an action point of the laser beam and the feedstock. A corresponding laser-solid-forming manufacturing method is also presented.

Abstract: A chaotic stirring device combining plasma arc smelting and permanent magnet including a furnace body; the furnace body is provided therein with a water-cooled copper crucible; the center of an upper surface of the water-cooled copper crucible is a groove for placing raw metals, and the water-cooled copper crucible is internally a hollow cavity; a return pipe is disposed directly below the groove in the hollow cavity; an upper end of the return pipe is vertical upward, and is horizontally provided with a filter screen; a spherical magnet is placed between the filter screen and the groove; one side of the water-cooled copper crucible is provided with a first water inlet pipe and a first water outlet pipe; the first water inlet pipe is connected to the hollow cavity, and the first water outlet pipe is connected to the bottom of the return pipe.

Abstract: A method for preparing a soil conditioner comprises the following steps: swelling alginates in distilled water to obtain alginate gel; adding chitosan to prepare an alginate/chitosan composite material; reacting with N-isopropylacrylamide, and dissolving the obtained reaction product in water to obtain an aqueous phase; dissolving a soil conditioning material in a solvent to obtain an oil phase; mixing the oil phase with the aqueous phase, and performing stirring reaction and centrifugal separation to prepare the product. Compared with the prior art, the present invention implements conditioning and intelligent controlled release of soil by means of molecular structure design and composition control.

Abstract: A shoe energy collecting device includes a shell, a piezoelectric assembly, an elastic component, a magnet array, a base, a supporting block, an upper friction assembly and a lower friction assembly. The shell includes a supporting shell and a plastic shell connected in sequence. The base is provided below the supporting block in the supporting shell, the lower friction assembly is provided between the supporting block and the base. The upper friction assembly is provided on an inner wall of a top surface of the plastic shell. A coil is provided on a lower surface of the lower friction assembly at a side of the plastic shell, and the magnet array is provided below the coil. The piezoelectric assembly is provided in the plastic shell, the elastic component is provided on a side wall of the plastic shell away from the supporting block, and connected with the piezoelectric assembly.

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 Boltzmann-based method for simulating a CVI densification process of a composite material is provided. Phase space occupancy is provided in the method, such that a geometrical model can be presented by using the concept of a matrix, and components of a space are distinguished; and a phase space occupancy matrix can directly participate in operation, which is equivalent to a natural division of grids and boundaries, and the boundaries are presented by a phase parameter, which is a natural capturing process. Flow field calculation of the method uses virtual time step calculation, such that a boundary condition can be written in a unified form, thereby improving the programmability.

Abstract: An electromagnetic and triboelectric hybrid energy collector for low-frequency movement is provided. The electromagnetic and triboelectric hybrid energy collector comprises an electromagnetic module, triboelectric modules and spring mass modules. The electromagnetic module includes a shell, a magnet frame, a magnet array, coil arrays, coil frames and coil magnetic conductive columns. The spring mass modules include respective springs, respective mass blocks and respective end caps. The triboelectric modules include multiple nano-friction power generation units which are connected in sequence. When the energy collector is excited to move a magnet assembly. The electromagnetic module generates voltage according to the Faraday's law of electromagnetic induction. The movement of the magnet assembly generated by external excitation may also cause contact and separation between triboelectric units to generate voltage.

Abstract: The invention relates to a radioactive I-labeled Larotrectinib compound and a preparation method and application thereof, including a radioactive I-labeled Larotrectinib compound having the following structural formula and its analogs: where R1 and R2 are respectively H, F, Cl, Br, 123I, 124I, 125I, 130I or 131I, and at least one of R1 and R2 is a radioactive iodine element. The invention provides a preparation method of a radioiodinated pyrazolo[1,5-a]pyrimidine compound base. Radioiodinated pyrazolo[1,5-a]pyrimidine compounds with long half-life and different ray energy can be used for PET tomography and clinical diagnostic research of SPECT. Moreover, the high-energy radioiodinated pyrazolo[1,5-a]pyrimidine can act as a TrK receptor ligand to inhibit the activity of TRK and kill tumor cells; and due to high-energy I-131 ray energy carried, the radioiodinated pyrazolo[1,5-a]pyrimidine can coordinate to shoot tumor cells and thus achieve an accurate radiotherapy effect.

Abstract: Disclosed is a method for fabricating a spherical concave mirror in an optical waveguide based on ultraviolet (UV) grayscale lithography. A key component is a specially designed mask pattern composed of a rectangle as well as a semicircle adjacent to the rectangle, where a rectangular area has no grayscale distribution, and UV light penetrating through different portions of the rectangular area has the same intensity; a semicircular area has the grayscale distribution, and the UV light penetrating through the semicircular area with the grayscale distribution is changed in intensity from the center of a circle in the radius direction according to a special function distribution law; an interlayer photoresist in the rectangular area is irradiated by the UV light penetrating through a mask plate and is developed to form an optical waveguide core.

Abstract: A quantum-dot-based measuring system is disclosed. The quantum-dot-based measuring system includes a laser to emit excitation light, an optical fiber probe including a tail end and a tapered tip, and the tapered tip of the optical fiber probe is attached with one or more quantum dots, and the excitation light is injected from the tail end of the optical fiber probe and emitted from the tapered tip to a sample to be detected, an objective lens to collect optical signal reflected by the sample and a spectrometer to receive the optical signal.

Abstract: An antenna module and a terminal applying the antenna module are disclosed. The antenna module includes an antenna array configured with a plurality of antenna units and a radio-frequency phase shifting system. The antenna array and the radio-frequency phase shifting system are integrated on a circuit substrate to form an independent module. Further, the antenna unit of the antenna module may adopt a solution of a microstrip patch antenna structure loading a short-circuit pillar to generate multiple resonances, thereby expanding the bandwidth of the antenna unit. After the antenna array is formed, the antenna modules may be further arranged perpendicular to each other to expand and achieve large-angle scanning and polarization diversity functions. The disclosed antenna module has a simplified structure and may be applied to 5G communication. It has the advantages of easy system integration, low-profile miniaturization, wide radiation bandwidth, and large-angle scanning.

Abstract: The present invention discloses an afterload device for ex situ heart perfusion, which includes an afterload energy storage module, a pressure regulation module and two flow rate regulators that are connected through a conduit. The afterload energy storage module includes a rigid closed container and a flexible container. The perfusion fluid flows into the flexible container from one side thereof through the conduit, and the perfusion fluid flows out from the flexible container at another side thereof as the flexible container is subjected to the action of the medium pressure in the rigid hermetic container. The pressure regulation module includes two pressure regulation valves and a compressible-medium source, for regulating the pressure range within the rigid hermetic container to be always maintained between the set diastolic pressure and the set systolic pressure.

Abstract: An electromagnetic type quasi-zero stiffness absolute displacement sensor that includes an intermediate shaft, upper end cover, first sliding bearing arranged on the upper end cover, upper housing fixedly connected to the upper end cover, electromagnetic coil fastened onto an inner wall of the upper housing, spiral spring, spring support connected to a lower end of the spiral spring, force sensor fastened onto a lower end surface of the spring support, lower end cover fastened onto lower end surface of the force sensor, and a lower housing connected to the lower end cover; the intermediate shaft sequentially passes through, from top down, the first sliding bearing, upper end cover, and electromagnetic coil, and is connected to an upper end of the spiral spring; and the upper housing is provided therein with a ring permanent magnet that is nested on the intermediate shaft and is not in contact with the electromagnetic coil.

Abstract: An electromagnetic type quasi-zero stiffness absolute displacement sensor that includes an intermediate shaft, upper end cover, first sliding bearing arranged on the upper end cover, upper housing fixedly connected to the upper end cover, electromagnetic coil fastened onto an inner wall of the upper housing, spiral spring, spring support connected to a lower end of the spiral spring, force sensor fastened onto a lower end surface of the spring support, lower end cover fastened onto lower end surface of the force sensor, and a lower housing connected to the lower end cover; the intermediate shaft sequentially passes through, from top down, the first sliding bearing, upper end cover, and electromagnetic coil, and is connected to an upper end of the spiral spring; and the upper housing is provided therein with a ring permanent magnet that is nested on the intermediate shaft and is not in contact with the electromagnetic coil.

Abstract: A graphene-containing composite material comprises components of a composite functional material with a double-conductive channel and a polymer matrix. The composite functional material with a double-conductive channel is sulfonated graphene surface grafted conductive polymer poly-3,4-(ethylenedioxythiophene). The composite functional material with a double-conductive channel and the graphene-containing composite material can be used for preparing a piezoresistance response material or an antistatic or electromagnetic shielding material and the like, and have excellent piezoresistance response, piezoresistance repeatability and electromagnetic shielding effect. The present invention is simple and easy to operate, can be used in large scale production, has excellent piezoresistance performance and very sensitive piezoresistance response, with the percolation threshold being only 0.

Abstract: The present invention relates to a parallel image measurement method oriented to the insulating layer thickness of a radial symmetrical cable section. The method conducts the non-contact high-accuracy measurement based on the machine vision and the image analysis, adopts a GPU multi-core parallel platform for the high-speed measurement, extracts the useful information from the section image of the radial symmetrical cable, and then measures the insulating layer thickness. Compared with the prior art, the present patent can lower the time consumed for the accurate measurement, fill in the blank of the high-accuracy parallel image measurement of the insulating layer thickness of the radial symmetrical cable section in the domestic cable industry, break down the monopoly and technology blockade by related foreign manufacturers and improve the technology level of on-line testing of product quality in China, expedite the production automation progress of domestic manufacturer.