Abstract: Disclosed is a copper-niobium alloy for a medical biopsy puncture needle. A needle core and/or needle tube of the puncture needle are/is made of the copper-niobium alloy. The copper-chromium alloy includes the following components by mass: 5?Nb?15 and the balance of Cu. A copper alloy with designed components is obtained by combining a diamagnetic material Cu with paramagnetic Nb, and compared with existing medical stainless steel and titanium alloy, the copper alloy has greatly reduced magnetic susceptibility, and specifically, the artifact area and volume are also significantly reduced. In addition, the blank of use of the copper alloy in medical biopsy paracentesis is filled.

Abstract: A cholecystokinin (CCK) secretion-promoting peptide targeting a calcium-sensing receptor (CaSR), and a preparation method and use thereof are provided. The CCK secretion-promoting peptide targeting a CaSR is a QGDVVALPA active peptide and has an amino acid sequence as follows: Gln-Gly-Asp-Val-Val-Ala-Leu-Pro-Ala. Compared with the prior art, the active peptide is allowed to be artificially synthesized through a chemical solid phase synthesis method, and is allowed to be obtained by an enzymatic hydrolysis of oat protein, separation and purification. The active peptide is allowed to target the CaSR of an intestinal endocrine cell membrane to activate a Gq signal pathway, thereby further increasing an intracellular calcium ion concentration to significantly promote secretion of CCK by an intestinal endocrine cell; and moreover, the active peptide has the advantages of safety, no toxic side effect, tolerance to digestive enzyme hydrolysis of a gastrointestinal tract, easy absorption, etc.

Abstract: Disclosed is a magnetorheological fluid particle impact damper, which includes a damper cavity unit, wherein the damper cavity unit is provided with an electromagnetic coil in a circumferential direction, the damper cavity unit is internally provided with a plurality of horizontal shock absorbers in a uniform manner, and the left and right ends of the damper cavity unit are symmetrically provided with disc-type shock absorbers; the shock absorbers and the disc-type shock absorbers are respectively connected to the inner wall of the damper cavity unit through springs; the horizontal shock absorber includes a horizontal magnetorheological fluid cavity filled with magnetorheological fluid, the horizontal magnetorheological fluid cavity is internally provided with a horizontal impactor container, the horizontal impactor container is internally provided with a first impactor group consisting of several impactors of different sizes; the disc-type shock absorber comprises a disc-type magnetorheological fluid cavity

Abstract: The present invention discloses a method for the rapid assessment of the service life of a hub bearing under multiaxial random road loading, comprising the following steps: acquiring a measured load spectrum of a wheel center of an automobile, and converting the wheel center load into an axial load and a radial load borne by a hub unit; performing load level division on the axial load and radial load borne by the hub unit, and performing joint distribution counting; according to the deformation coordination relationship between a roller and a raceway of the bearing, establishing a bearing contact model under a joint load, and according to the bearing contact model and the result of joint distribution counting, calculating the actual contact load of the bearing under different loads; and calculating the equivalent dynamic load and the life of the bearing through the actual contact load of the bearing to obtain the total equivalent damage of the bearing.

Abstract: Disclosed is a robust topology optimization design method of a damping composite stiffened cylindrical shell box structure, comprising: constructing working load data, and obtaining circumferential target modal frequencies based on the working load data and the stiffened cylindrical shell box; laying constrained layer damping materials on the stiffened cylindrical shell box to construct a damping composite stiffened cylindrical shell box; constructing interval parameters based on the damping composite stiffened cylindrical shell box, and obtaining modal loss factor based on the interval parameters; constructing an objective function based on the modal loss factors, constructing design variables and constraint conditions based on the damping composite stiffened cylindrical shell box, integrating the objective function, design variables and constraint conditions to form an interval robust topology optimization model; updating the design variables based on the interval robust topology optimization model, and obt

Abstract: Provided is a system for measuring gas temperature and component concentrations in a combustion field based on optical comb. The system includes two pulse laser devices, two continuous laser devices, a beam splitting device, a measurement path, an interference signal detecting device, an optical processing and electrical processing device and a signal acquisition and analysis device. The measurement path refers to the combustion field to be measured. The interference signal detecting device outputs an interference signal. The optical processing and electrical processing device includes several optic elements and electrical elements, and outputs an adaptive compensation signal and an asynchronous sampling clock signal after a series of processing on output of the two pulse laser devices and two continuous laser devices. The signal acquisition and analysis device outputs the measurement result based on the adaptive compensation signal, the asynchronous sampling clock signal and a stable interference signal.

Abstract: The present disclosure provides a stealth dicing method and apparatus. With the method, the focusing element focuses the laser beam on the surface of material to be diced, and the dynamic-equilibrium plasma channel is formed in the material to be diced by means of self-focusing and defocusing effect of plasma generated by ionizing the material to be diced. The modified layer may be formed in the material to be diced throughout the plasma channel, so as to realize stealth dicing.

Abstract: Disclosed is a robust topology optimization design method of a damping composite stiffened cylindrical shell box structure, comprising: constructing working load data, and obtaining circumferential target modal frequencies based on the working load data and the stiffened cylindrical shell box; laying constrained layer damping materials on the stiffened cylindrical shell box to construct a damping composite stiffened cylindrical shell box; constructing interval parameters based on the damping composite stiffened cylindrical shell box, and obtaining modal loss factor based on the interval parameters; constructing an objective function based on the modal loss factors, constructing design variables and constraint conditions based on the damping composite stiffened cylindrical shell box, integrating the objective function, design variables and constraint conditions to form an interval robust topology optimization model; updating the design variables based on the interval robust topology optimization model, and obt

Abstract: The present disclosure discloses a copper-niobium alloy for a medical biopsy puncture needle. A needle core and/or needle tube of the puncture needle are/is made of the copper-niobium alloy. The copper-chromium alloy includes the following components by mass: 5?Nb?15 and the balance of Cu. According to the present disclosure, a copper alloy with designed components is obtained by combining a diamagnetic material Cu with paramagnetic Nb, and compared with existing medical stainless steel and titanium alloy, the copper alloy has greatly reduced magnetic susceptibility, and specifically, the artifact area and volume are also significantly reduced. In addition, the blank of use of the copper alloy in medical biopsy paracentesis is filled.

Abstract: The present invention discloses a method for the rapid assessment of the service life of a hub bearing under multiaxial random road loading, comprising the following steps: acquiring a measured load spectrum of a wheel center of an automobile, and converting the wheel center load into an axial load and a radial load borne by a hub unit; performing load level division on the axial load and radial load borne by the hub unit, and performing joint distribution counting; according to the deformation coordination relationship between a roller and a raceway of the bearing, establishing a bearing contact model under a joint load, and according to the bearing contact model and the result of joint distribution counting, calculating the actual contact load of the bearing under different loads; and calculating the equivalent dynamic load and the life of the bearing through the actual contact load of the bearing to obtain the total equivalent damage of the bearing.

Abstract: The present disclosure provides a terahertz biological detection method and a device comprising the same, in which biological samples with different molecular formulas have their characteristic peaks in the terahertz band. In the process of sweeping frequency with terahertz, when the terahertz frequency point corresponds to the characteristic peak frequency of the substance to be detected, resonant absorption occurs, and the transmitted/reflected terahertz wave electric field intensity will suddenly decrease. In the electromagnetically induced transparency spectrum corresponding to the Rydberg quantum state, the signal splitting amplitude is significantly reduced. Therefore, the characteristic peak frequency and specific content of the substance to be detected can be accurately determined by comparing the dependence of the Rydberg quantum state with the additional terahertz electric field intensity on the excitation energy level.

Abstract: The present invention discloses a compilation method for a reliability test load spectrum of a high-speed bearing of an electric drive system. The method comprises the following steps: based on load data of a whole life cycle of an electric drive system, correlating a leading failure load of a high-speed bearing; counting an action frequency of each load level by a multi-dimensional load joint counting method; constructing a bearing mechanical balance equation; determining a reliability test load level by damage contribution distribution and cumulative damage contribution distribution of different load levels; according to a principle of a consistent overall frequency and consistent damage, determining a time of the reliability test load level; and in combination with extreme load working conditions, finally constructing a reliability test load spectrum of the high-speed bearing.

Abstract: The invention provides an equalizing device for a vehicle soft-packed battery and an equalizing method for the soft-packed battery. According to the equalizing method for the vehicle soft-packed battery, a battery to be equalized is connected to a parallel equalization circuit by using an equalizing device for a vehicle soft-packed battery, battery cells to be equalized are sequentially equalized by adopting a first-in first-out sequence, and the SOC of each cell equalized is maintained within a preset range; and the number of the cells entering the equalizing device for the vehicle soft-packed battery is N, and the equalizing time of the battery cells is T. The equalizing device for the vehicle soft-packed battery comprises a holder clamping type or a copper sheet compressing type.

Abstract: A three-port silicon beam splitter chip includes an input waveguide, three output waveguides, and a coupling region disposed between the input waveguide and the output waveguides and being in a square shape. The input waveguide and the output waveguide have a same width K, where 490 nm<K<510 nm, the coupling region, the input waveguide and the output waveguide have a same thickness H, where 210 nm<H<230 nm, and the coupling region has a length L, where 1600 nm<L<2000 nm. The three-port silicon beam splitter chip of the present disclosure has a high integration degree and a small size, and is capable of improving the portability of the wavefront reconstruction device.

Abstract: The invention discloses a wearable multifunctional powered exoskeleton for cervical vertebra rehabilitation, and relates to the field of man-machine interaction rehabilitation aids. The wearable multifunctional powered exoskeleton for cervical vertebra rehabilitation comprises an active drive motor module, a fixed supporting module and a movable joint component; the active drive motor module is connected to the fixed supporting module, and comprises a left shoulder push rod motor, a right shoulder push rod motor, a cervico-thoracic vertebra left front side push rod motor, a cervico-thoracic vertebra left rear side push rod motor, a cervico-thoracic vertebra right front side push rod motor, and a cervico-thoracic vertebra right rear side push rod motor; and the active drive motor module and the movable joint component are combined to jointly form a six-connecting rod power-driven structure.

Abstract: The present invention discloses a method for quantitative diagnosis of electricity leakage or micro-short-circuit in single cells based on capacity estimation, comprising the steps as follows: S1 is obtaining the charge-discharge data of the cell; S2 is estimating the charge capacity CC and discharge capacity CD of the cell respectively by the traditional method of capacity estimation; S3 is calculating the ratio of discharge capacity to charge capacity and judging that leakage of electricity occurs when the ratio is less than the threshold; S4 is calculating the estimated value of leakage current according to the ratio of discharge capacity to charge capacity. According to the present invention, the quantitative diagnosis of leakage current of the single cell can be realized, which will improve the safety and reliability in use thereof.

Abstract: The present invention provides a method for sorting lithium cells, which includes quick sorting and high-precision sorting. The method provided by the present invention can be used for quickly and accurately classifying cells based on self-discharge, and is applicable to large-scale self-discharge sorting due to low cost of adopted equipment. Through the quick sorting method and the high-precision sorting method in the present invention, cells with large self-discharge rates can be eliminated from a batch of cells, cells with similar self-discharge rates can be sorted into groups, and an application range is wider.

Abstract: Provided is a method for identifying authenticity and origin of Panax quinquefolius based on terahertz spectroscopy. The time domain spectral information of the Panax quinquefolius sample is obtained, and converted into the frequency domain spectral information by Fourier transform to calculate a terahertz absorption spectrum. The identification is performed by observing whether there are characteristic absorption peaks of pseudoginsenoside F11 in the terahertz absorption spectrum.

Abstract: This invention discloses a semi-active rigid-flexible coupling exoskeleton based on a single-loop bidirectional damping regulator and relates to a power assisting mechanism in the field of robots, the exoskeleton including a waist assembly, a leg assembly, and a hydraulic damping regulator; the hydraulic damping regulator includes a cylinder body, a titanium alloy sleeve, a cylinder head, a piston, an extension assisting spring, an oil injection port plug, a staggered channel-type valve body, a valve body sealing seat, a valve body-end bevel gear, an angle sensor, a motor fixing seat, a DC servo motor, a coupler, and a motor-end bevel gear. According to the invention, two modes of power assistance or damping regulation, i.e.

Abstract: The present invention provides a shunt wound direct-current (DC) motor driving device and electrical equipment. The shunt wound DC motor driving device provided by the present invention includes a shunt wound DC motor, a DC power supply, and a chopper that converts a constant voltage into a variable voltage based on a control signal and provides the variable voltage for the shunt wound DC motor.