10results about How to "Short test cycle" patented technology

The invention relates to the technical field of cement and concrete, in particular to a Bayer process red mud volcanic ash activity evaluation method which comprises the following steps: calcining Bayer process red mud to be detected to obtain calcined Bayer process red mud; the polymerization degree of the calcined Bayer process red mud is measured by adopting Fourier transform infrared spectroscopy, the polymerization degree of the Bayer process red mud is in negative correlation with the activity, the pozzolanic activity of the Bayer process red mud is evaluated by measuring the polymerization degree, and the pozzolanic activity of the Bayer process red mud is evaluated by adopting the Fourier transform infrared spectroscopy to measure the polymerization degree of the Bayer process red mud. The polymerization degree of the red mud is reduced along with the increase of the volcanic ash activity and is in negative correlation, and the compressive strength and the dissolution solubility of Si + Al are in positive correlation with the volcanic ash activity of the red mud.

The invention discloses a battery cell detection method and a battery cell detection device. The detection method is used for determining whether the internal short circuit risk exists in the battery cell to be detected after liquid injection infiltration. The detection method comprises the following steps: preprocessing a to-be-detected battery cell to enable the to-be-detected battery cell to enter a test state; the pretreatment at least comprises pressurization and heating of the to-be-tested cell and maintenance for a first time period; continuously applying excitation voltage to the to-be-tested battery cell in the test state for a second time period, and acquiring response current of the to-be-tested battery cell in the second time period; and determining whether the to-be-detected cell has an internal short circuit risk based on the response current. According to the invention, whether the internal short circuit risk exists in the battery cell or not can be rapidly and accurately detected before formation, so that defective products are rejected in advance, and the production safety and efficiency are improved.

The invention belongs to the technical field of metal material quality test and evaluation, and discloses a primary magnesium ingot internal inclusion level evaluation method and system.The method comprises the steps that firstly, the hydrogen evolution rate and the characteristic low-frequency impedance modulus value of a primary magnesium ingot to be tested are obtained; and then the level of the inclusions in the primary magnesium ingot to be tested is evaluated through the hydrogen evolution rate, the characteristic low-frequency impedance modulus value and the pre-constructed hydrogen evolution-impedance collaborative response criterion, and the method is easy and convenient to operate, short in test period, low in cost and high in accuracy. The method can be used for rapidly identifying the extremely inferior magnesium ingot with components meeting requirements and a large number of densely distributed inclusions inside without depending on microscopic analysis, is suitable for quality monitoring and supplied material acceptance in the production process, and has remarkable industrial practical value.

This invention discloses a multi-pulse loading nonlinear response amplification test device and method for explosive structures, relating to the field of structural and material response simulation technology under impact loads. It includes a loading section and a structural response section. The loading section includes a projectile A, which has a large-diameter end and a small-diameter end. A projectile B is disposed outside the small-diameter end of projectile A, and a projectile C is disposed outside projectile B. An adjusting ring B is disposed at the end of projectile B near the large-diameter end of projectile A, and an adjusting ring C is disposed at the end of projectile C near the large-diameter end of projectile A. The masses of projectiles A, B, and C are equal. The structural response section includes a limiting block and a mass block, with a force transmission rod disposed between the limiting block and the mass block. The mass block has a loading through-hole and a mounting hole for the force transmission rod. This test device can achieve loading pulses of no less than 3 times, explosive pressure on the order of hundreds of MPa, and pressure amplitude amplification of approximately 1.9 times, with a short test cycle and low cost.

The application relates to a genetically engineered body, and particularly discloses a perilla frutescens PfCHLH gene and a virus-induced gene silencing system, a construction method and application of the gene silencing system. PfCHLH The nucleotide sequence of the gene is shown as SEQ ID NO. 1, and the amino acid sequence of the encoded protein is shown as SEQ ID NO. 2. PfCHLH The gene silencing fragment is cloned into a virus carrier pTRV2 to obtain a pTRV2- PfCHLH silencing carrier, and the pTRV2 carrier and the pTRV1 carrier are respectively transformed into agrobacterium GV3101 to prepare infection bacterial liquid; the infection bacterial liquid is mixed according to a volume ratio of 1:1 and then injected into perilla frutescens cotyledons to induce gene silencing. PfCHLH qRT-PCR verification shows that the expression amount is significantly down-regulated and a stable yellowing phenotype is generated; preferably, the OD 600 of the infection bacterial liquid is 0.6, the silencing phenotype is more significant, and the consistency is better. The perilla frutescens VIGS system established in the application is simple in operation, short in cycle, and high in efficiency, and can be used for rapid identification of perilla frutescens gene functions and verification and application of key genes in related metabolic pathways.

The utility model belongs to the technical field of powder metallurgy bearing testing, and particularly relates to an automobile motor powder metallurgy bearing vertical friction performance testing device which comprises a bottom plate. A mounting through hole is formed in the center of the bottom plate, and a servo electric cylinder is arranged on one side of the top surface of the bottom plate; a telescopic shaft of the output end of the servo electric cylinder is connected with a push block. The other end of the push block is connected with a tension seat; a test part is arranged on the tension seat, the center of the tension seat is arranged at the mounting through hole of the bottom plate, a driving part is arranged at the lower part of the tension seat, and the driving part is used for cooperating with the test part to test the performance of the to-be-tested bearing together. According to the utility model, the testing component and the driving component are matched for use, so that different loads can be increased for testing according to testing requirements, the testing repeatability and accuracy are greatly improved, the testing is more time-saving and labor-saving, the time cost is reduced, and the product development efficiency is improved.

This invention relates to the field of experimental testing technology in oil and gas exploration and development, and particularly to a method for determining the effective porosity of shale oil samples based on two-dimensional nuclear magnetic resonance (NMR) technology. The method involves: preparing the target NMR sample using a freezing method, and calibrating the water and oil content values ​​separately; conducting water and oil distribution experiments on the sample, followed by pore characteristic experiments; calibrating the effective and ineffective pore regions and water and oil distribution regions of the sample's NMR signal, and providing different boundary delineation methods; calibrating the NMR signal obtained from the two-dimensional NMR, and delineating the effective and ineffective pore regions and oil and water distribution regions of the tested sample according to the boundary delineation methods; based on the shale pore properties, recovering the sample pore volume and performing two-dimensional NMR measurement to determine the total volume of the sample; obtaining data using oil-water data extraction methods, and combining this data with the total volume to obtain the effective porosity. The method provided by this invention is convenient, fast, has a short experimental cycle, and high production efficiency.

The application relates to the technical field of rotor aerodynamics and computational fluid dynamics, and discloses a CFD simulation method for rotor disc chamfering, which comprises the following steps: obtaining a damped flapping dynamics equation according to a flapping dynamics equation of a blade; converting the damped flapping dynamics equation into a second-order ordinary differential equation; obtaining a flapping dynamics response under ideal simple harmonic vibration excitation according to the second-order ordinary differential equation; converting the second-order ordinary differential equation into a first-order ordinary differential equation group; solving the first-order ordinary differential equation group to obtain a flapping angle of the blade and a first time derivative of the flapping angle; performing fast Fourier transform on the flapping angle to obtain a periodic flapping solution; obtaining an aerodynamic moment of the blade on a flapping hinge through flow field calculation; substituting the aerodynamic moment into the second-order ordinary differential equation; solving the second-order ordinary differential equation to obtain a new flapping angle; and obtaining a final flapping angle according to harmonic components of the flapping angle in each rotation period. The application improves the simulation precision of rotor disc chamfering.

The invention relates to the field of specific heat capacity measurement, and provides a battery specific heat capacity measurement method, which comprises the following steps: acquiring the mass and temperature time sequence record of a battery, acquiring the temperature time sequence record, specific heat capacity and mass of a cooling liquid and a heater, acquiring the heating power and working time of a lithium battery, and calculating the total input heat; inputting the temperature time sequence records corresponding to the battery, the cooling liquid and the heater into a temperature drop amplitude calculation model to respectively calculate the temperature drop amplitude caused by heat loss; and inputting the corresponding specific heat capacities and masses of the battery, the cooling liquid and the heater into the specific heat capacity calculation model to obtain the specific heat capacity of the battery. When the device is used and the temperature drop amplitude is calculated, the cooling curve is divided into the rapid cooling area and the slow cooling area, segmented calculation is carried out, and the device has the advantages of being short in test period, low in cost, easy to operate and the like.

The invention discloses a vehicle kinetic parameter and tire force estimation method based on three-line concurrent eigenvalues. Comprising the following steps: based on a three-degree-of-freedom dynamic model of a vehicle and by taking a tire transverse resultant force of the vehicle as a coordinate axis, determining a three-line concurrent eigenvalue, a state quantity therein and a dynamic parameter of a rigid body to be estimated; based on the collected state data of the state quantity, taking the minimization sum of three-line concurrent eigenvalues corresponding to the state data as a target, estimating the estimated rigid body dynamic parameters, and obtaining a target dynamic parameter value; estimating the longitudinal force of each driving wheel of the vehicle based on the target kinetic parameter value, and solving the over-constrained linear model of the tire transverse resultant force by adopting a least square method to obtain the tire transverse resultant force; and determining a tire force parameter in a tire model of the vehicle according to the tire slip angle of the vehicle, the target kinetic parameter value and the tire transverse resultant force. Accurate estimation of complete vehicle dynamic parameters and tire force can be realized only by relying on a conventional sensor.