16results about How to "Realize engineering application" patented technology

The invention discloses a nuclear power device fault diagnosis method based on feature vectors and Bayesian reasoning, belongs to the technical field of Bayesian reasoning, and particularly relates to nuclear power device fault diagnosis. The method solves the problem that a traditional Bayesian model only uses parameter values as a fault reasoning basis and ignores a large amount of parameter time-frequency feature information, so that the model is difficult to distinguish feature similar faults and realize accurate positioning of the faults, and the fault diagnosis accuracy and the model robustness are affected. The method comprises the following steps: a model learning step: performing structure learning and parameter learning on a Bayesian model according to fault historical operation data to obtain a Bayesian vector reasoning model; the nuclear power device fault diagnosis method based on the feature vector and Bayesian reasoning is suitable for fault diagnosis of a nuclear power device.

The present invention relates to the technical field of functional property modification of high-temperature shape memory alloys, and in particular to a method for improving the superelasticity of NiTiHf high-temperature shape memory alloys. The method specifically comprises the following steps: sequentially subjecting NiTiHf high-temperature shape memory alloy ingots to homogenization treatment, rolling treatment, and electric pulse treatment. The present invention couples rolling with electric pulses and precisely controls parameters such as temperature, time, and frequency, thereby successfully achieving a NiTiHf high-temperature shape memory alloy with significantly improved superelastic properties without the need for severe plastic deformation treatment and long-term medium and high temperature heat treatment. Compared with the cast NiTiHf high-temperature shape memory alloy, in addition to significantly improving the superelastic properties, the elongation and tensile strength of the alloy are also greatly improved, wherein the recoverable strain increase is more than 200%, the elongation is increased by nearly 3 times, and the tensile strength is increased by more than 10%.

The application discloses a comprehensive electronic equipment detonator impedance detection compensation method, and aims at solving the technical problems that the existing comprehensive electronic equipment does not have a detonator impedance detection function, and the impedance detection precision is poor, the expected performance cannot be reached, and the detection difficulty is great. The application improves the detonator impedance test precision and the automation level, and realizes the engineering application of the detonator impedance detection function on the comprehensive electronic equipment. The method can also be popularized and applied to other occasions needing to detect the detonator impedance, and has certain guiding significance for engineering practice.

The invention discloses a three-dimensional FDTD metal conformal stabilization simulation method. The method comprises the steps of grid construction and boundary identification, effective electromagnetic parameter calculation, stability condition pre-verification, field quantity iteration updating and boundary condition convergence judgment. According to the method, high-precision and high-stability electromagnetic simulation of a complex medium boundary and a metal boundary is realized by combining an integral form of the effective dielectric constant and the magnetic conductivity, a posterior weighted stabilization strategy and a strict integral updating rule of the metal boundary, meanwhile, the robustness of an algorithm to a time step length is improved, and the practical application scene of the method is expanded.

The invention relates to an antibody-biomacromolecule conjugate. The antibody-biomacromolecule conjugate comprises an antibody targeting module, a complement effect module and a connexon, the antibody targeting module can be specifically combined with a cell membrane surface antigen, and the complement effect module is a key enzyme C1s in a classical complement pathway or a functional structural domain with complement splitting activity of the key enzyme C1s. The linker is used for connecting the antibody targeting module with the complement effect module, and is designed to generate cutting or conformational change on the outer side of a cell membrane or in an extracellular microenvironment, so that the complement effect module is converted from a limited state to a functional accessible state; to promote initiation of a classical complement pathway in the neighborhood of the cell membrane located by the antibody targeting module. The antibody-biomacromolecule conjugate provided by the invention can be used for engineering regulation and control of complement-related reactions.

The application discloses a mud generator torque control method and system, and belongs to the technical field of well drilling engineering. The method comprises the following steps: performing phase identification on three-phase alternating current output by a mud generator through a digital processor, generating a PWM driving signal based on phase information, controlling the conduction and shutdown of a power switch tube connected with a generator winding, adjusting the current of a generator stator winding, and completing the control of the output torque of the generator. The application performs phase identification on three-phase alternating current through a digital processor and generates a PWM driving signal, realizes accurate control of the output torque of the generator, directly adjusts the current of the stator winding, and avoids the heat dissipation and space problems caused by the traditional resistance dissipation mode.

The application provides an improved closed-loop guidance method suitable for a reusable rocket, and relates to the technical field of rocket recovery guidance. The method comprises the following steps: determining the velocity and position in the launch inertial system at the engine shutdown time of the power deceleration stage according to the initial value of the remaining flight time of the active stage, the real-time gravity acceleration and the initial value of the program angle of the power deceleration stage; determining the absolute longitude difference between the position in the launch inertial system at the engine shutdown time of the power deceleration stage and the target point; determining the remaining flight time of the passive stage; and determining the required velocity and program angle calculation value of the closed-loop guidance. According to the application, the calculation method of predicting the state of the shutdown point can be used to calculate the required velocity, the program angle change rate of the power deceleration stage is reduced, the control effect is optimized, and the stability is improved. Moreover, the calculated required velocity can reach the position constraint and velocity direction constraint of the passive stage end point after the rocket is shut down, the structure is simple, the operation efficiency is high, and the method is convenient to run on different hardware.

The application discloses a turning workpiece modeling and dynamic updating method for ultra-precision turning, and belongs to the technical field of numerical control machining simulation and digital twin manufacturing. The method firstly acquires initial geometric parameters of a turning blank, divides the blank into a plurality of sequentially arranged discrete layers along a workpiece spindle direction according to a blank length and an axial layering thickness, and establishes corresponding layer data; in a simulation running process, a tool path point is periodically received and a possible intersecting discrete layer interval is determined, intersection determination and contour parameter updating are performed on the discrete layers in the interval, and finally, the current workpiece topography is locally reconstructed according to the updated parameters. The method fully utilizes the characteristics of the turning workpiece rotary body, reduces redundant calculation caused by global reconstruction, improves the dynamic updating efficiency of the workpiece topography, and is suitable for the real-time simulation scene of ultra-precision turning.

The invention discloses a multi-path parallel segmented pulse pressure acceleration method, device and equipment based on an FPGA (Field Programmable Gate Array). The method comprises the following steps: step 1, configuring a pulse pressure parallelism degree # imgabs0 #, and matching the number of segments and the length of sub-segments of a filter; 2, determining the number of target pulse pressure times, and generating # imgabs 1 # pulse pressure modules; 3, generating segmentation coefficients according to the pulse pressure parallelism degree and the target pulse pressure frequency of # imgabs2 pulse pressure modules; 4, inputting segmentation coefficients to # imgabs3 pulse pressure modules respectively to enable the pulse pressure modules to segment a matched filter, and performing segmented pulse pressure on echo data by using a narrowband filter obtained after segmentation; 5, judging whether the segmented pulse pressure times reach the target pulse pressure times or not; if not, returning to the step 4; and if so, completing the pulse compression. According to the method, the problem that complex echo data cannot be processed in time due to the fact that time consumption is too long in real-time signal processing application of a segmented pulse pressure algorithm in the prior art is solved, the implementation efficiency of the pulse pressure algorithm is improved, and the real-time performance is improved.

The invention relates to a ground surveillance radar based on an AOB phased array system, and belongs to the technical field of phased arrays. According to the system, by adopting a highly integrated microwave monolithic integrated circuit (MMIC) technology and an advanced phased array technology, the design targets of small size, light weight and low power consumption are achieved, and the environmental adaptability, reliability and anti-interference capability of the radar are remarkably improved. The system innovatively integrates broadband signal processing, digital beam forming and target tracking algorithms, can realize high-precision and real-time detection and monitoring of ground moving targets under complex meteorological conditions, is suitable for various security scenes such as boundary protection, key infrastructure protection and emergency response, and has wide application prospects. And the security and protection monitoring efficiency and security are greatly improved.

The application discloses an online adjusting device for micro-flow ammonia for denitration, which comprises intermittent ammonia supply units, vaporization units, buffer units and vapor-gas mixing units which are sequentially communicated; the intermittent ammonia supply units are communicated with liquid ammonia delivery pipes; the vapor-gas mixing units are communicated with ammonia injection lattices; the intermittent ammonia supply units are used for providing quantitative liquid ammonia supply; the vaporization units are used for vaporizing liquid ammonia; the vapor-gas mixing units comprise primary mixers and secondary mixers; the primary mixers are used for ammonia gas dilution; and the secondary mixers are used for online adjustment; adjusting valves are arranged between two adjacent units; and each adjusting valve is electrically connected with a DCS control system. The application combines intermittent ammonia supply and two-stage mixing, guarantees micro adjustment of ammonia flow under the condition of small ammonia consumption, realizes ultra-low emission transformation of industrial flue gas with low background nitrogen oxides, and has great engineering practical value.

This invention discloses a method for determining the dielectric loss factor of power distribution cable insulation for online monitoring. Based on the given information, the method obtains the following: [formula missing - likely a formula for calculating the dielectric loss factor]. By solving the inverse cosine function, [formula missing - likely a formula for calculating the dielectric loss factor] is obtained, which is the phase difference between [formula missing]. The complex effective values ​​of the voltage at the cable's starting end and the voltage at the cable's ending end are obtained. Based on [formula missing], [formula missing] is obtained, and the phase difference β between [formula missing] and [formula missing] is calculated. Based on [formula missing] and β, δ is calculated, and the tangent value tanδ is obtained, which is the desired dielectric loss factor of the power distribution cable insulation. This invention provides a method for online monitoring of the dielectric loss factor of power distribution cable insulation and provides necessary technical support for determining the insulation performance of power distribution cables. It overcomes the drawback of large errors when using the difference between the currents at the beginning and end of the cable to determine the dielectric loss factor, and can be applied in engineering.

The application provides a temperature measurement method, system, device, computer device and storage medium. The application corrects a target spectrum signal by using an attenuation coefficient calculated from a reference spectrum signal and a theoretical blackbody radiation value to obtain a corrected radiation amount. A link equation is alternately iteratively optimized based on the corrected radiation amount to obtain temperature information, which includes a target temperature and a target emissivity model parameter. The application can compensate for link response attenuation in real time, maintain long-term stability and consistency of the temperature measurement link without configuring a high-temperature blackbody source. In addition, the link equation of the application realizes joint solving of the emissivity model parameter and the wafer surface temperature, reduces the influence of emissivity uncertainty on the temperature inversion result, thereby realizing high-precision and wide-range measurement of the wafer temperature in a complex process environment, improving the precision of temperature closed-loop control and the process yield, and facilitating engineering application in a compact temperature measurement probe with limited volume.

The invention discloses a fastening system connection characteristic resolving method, a computer storage medium and a program product, and relates to the field of threaded connection performance prediction and nonlinear evolution thereof, and the method comprises the following steps: calculating friction heat of a screwing path according to a thread structure, a fastening terminal and a thread interface friction coefficient; testing to obtain hardness-temperature test data of the metal material of the thread structure, and obtaining a material softening model of the thread structure according to the friction heat Qi and the hardness-temperature test data; obtaining a material stress state according to the material softening model; a refined finite element model is constructed in finite element analysis software according to the thread structure, the refined finite element model comprises material attributes, and a material softening model is added in a material attribute module; and solving a stress field by virtue of finite element analysis software according to the friction heat Qi, the material hardness H, the material stress state and the refined finite element model. The problems that threaded connection stress state analysis is not real enough, simulation model precision is not good enough, test cost is high, and application is difficult are solved.

This invention relates to a continuous flow stepwise crystallization method and system for preparing micro / nano HMX at the microscale. It includes the following steps: (1) dissolving HMX in a solvent to form an HMX solution, and mixing the solvent and antisolvent to prepare a crystallization transfer solution; (2) flowing the HMX solution prepared in step (1) and the antisolvent into a primary micro-mixing crystallization unit at a desired flow ratio to generate a mixed-crystal HMX suspension with a mixed crystal particle size of 400 nm–60 μm; (3) flowing the mixed-crystal HMX suspension flowing out of the primary micro-mixing crystallization unit and the crystallization transfer solution prepared in step (1) into a secondary micro-mixing crystallization unit at a desired flow ratio, and secondary crystallizing the mixed-crystal system to obtain a pure β-HMX suspension with a crystal size in the micrometer range. This invention can obtain micro / nano β-HMX with high crystallization degree and high crystal purity by changing the mixing conditions and residence time in the secondary crystallization unit; the two-step crystallization method can meet the requirements for continuous and controllable preparation of high-quality elemental β-HMX with smaller crystal size and higher crystal purity.

The application relates to the technical field of voltage measurement, and discloses a non-intrusive voltage measurement device and a design method, which solve the problem that existing non-intrusive voltage measurement devices are easily affected in a harsh environment, thereby reducing measurement accuracy. The device comprises a metal shell, a sensor array provided with at least two electric field sensors and a voltage inversion module arranged in the metal shell, at least one hole array is arranged on the side wall of the metal shell, each hole array comprises at least two holes, the metal shell is electrically connected with a measured conductor in an installed state and forms an equipotential body, each electric field sensor is arranged corresponding to a hole in the hole array, and the sensing surface of the electric field sensor faces the corresponding hole; the voltage inversion module is electrically connected with each electric field sensor, is used for performing differential calculation on the output signals of the at least two electric field sensors, obtaining differential electric field data, and inversely calculating the voltage of the measured conductor according to the differential electric field data.