12results about How to "The calculation method is accurate" patented technology

The invention discloses a degradation conversion rate calculation method and system based on an epoxy resin alcoholysis model, and belongs to the technical field of thermosetting epoxy resin degradation and recovery. The method comprises the following steps: pouring epoxy resin to cure and mold, carrying out an epoxy resin alcoholysis degradation experiment at different temperatures, and recording degradation conversion rates at different moments; constructing an epoxy resin geometric model, and analyzing to obtain a degradation conversion rate differential expression containing reaction rate constants and geometric parameters; solving the differential equation to obtain a reaction rate constant, and fitting by using an Arrhenius formula to obtain degradation activation energy; analyzing a transesterification process of the epoxy resin and the alcohol solvent and a diffusion process of the alcohol solvent in the epoxy resin, and establishing a degradation conversion rate expression which does not contain geometric dimension parameters; and substituting degradation reaction activation energy, and fitting to determine a degradation conversion rate expression which does not contain geometric dimension parameters. The invention aims to provide a reference for the degradation process analysis of the large-size epoxy resin with a complex shape.

The invention relates to the technical field of precise feeding, in particular to a milk cow feed precise grading feeding system and method. The data analysis module is used for determining the health state of the dairy cow according to the change type of the physiological activity characteristics of the dairy cow within the first preset duration; the feeding method determining module is used for determining a feeding method according to the health state of the dairy cow and the production performance tendency value of the dairy cow; the feeding module is used for conveying a corresponding type of feed to a dairy cow trough according to a corresponding feeding method; the adjusting module is used for determining whether to adjust the feeding method determining process parameters or not according to the fluctuation degree of the production performance growth of the dairy cow in the preset period; by improving the analysis of the production performance of the dairy cows for graded feeding, the feeding accuracy of the dairy cows is improved, and then the production performance of the dairy cows is improved.

The application discloses a kind of aluminum shell lithium battery injection quantity calculation method, the application comprehensively considers the influence of the thickness rebound of the core suction capacity, free state electrolyte volume and process pole piece on injection volume to determine total injection volume and primary / secondary injection volume, can be applied to aluminum shell and soft package core simultaneously, with high accuracy of calculation result, beneficial to defining the best injection volume, can improve product quality, reduce waste, reduce production cost.The application uses the total volume Va inside the aluminum shell core design, the solid volume Vb and solid pore volume Vc inside the core, considering the porosity of pole piece and the porosity of diaphragm, combined with the density of electrolyte, to calculate the theoretical total injection volume of the core.

The invention discloses a method and system for determining the width of a geological interlayer based on a horizontal hole wall image, and the method comprises the following steps: determining the size information of the horizontal hole wall image according to the drilling scale parameters, the horizontal hole wall image comprising a geological interlayer and two parallel boundary lines of the geological interlayer; determining peak valley information of the first boundary line and a first horizontal distance between the first boundary line and the second boundary line according to the size information; and determining the geological interlayer width according to the peak valley information and the first horizontal distance. According to the invention, the size information of the horizontal hole wall image is determined according to the drilling scale parameter, then the peak valley information and the first horizontal distance are determined according to the size information of the horizontal hole wall image, and the geological interlayer width is further calculated, so that the determination of the geological interlayer width does not depend on manpower any more and is more efficient and accurate, the working cost is reduced, and the working efficiency is improved. And a worker can reasonably predict the change trend of the geological layer, so that a more reasonable and safer construction scheme can be formulated.

The invention provides an asphalt pavement crack propagation loading device, a detection method and an evaluation method. The asphalt pavement crack propagation loading device comprises a reaction frame, an actuator connected with the reaction frame, a telescopic rod connected with the actuator and a contact plate placed below the telescopic rod. The reaction frame comprises a base and a stand column, the base comprises four cross beams with the same length, two first longitudinal beams with the same length and two second longitudinal beams, the four cross beams are arranged in parallel at equal intervals, the first longitudinal beams are connected with the two sides of the four cross beams arranged in parallel, the length of the first longitudinal beams is the same as the width of the four cross beams after arrangement, and the second longitudinal beams are connected with the stand column. The two ends of the second longitudinal beam are connected with the two cross beams in the middle respectively, the second longitudinal beam is located in the middle of the two cross beams in the middle, and the length of the second longitudinal beam is equal to the distance between the cross beams; one side of a stand column of the counter-force frame is connected with four corners of the base, and the other side is in contact with the ground. The pavement crack propagation loading device provided by the invention can accurately detect the propagation path of the crack.

This invention provides a liquid hydrogen pipeline pressure fluctuation suppression energy dissipator and a fluid-structure interaction optimization method, relating to the field of liquid hydrogen storage and transportation safety technology. The energy dissipator adopts a modular integrated design, including a damping vibration reduction module, a gradient throttling module, and a pressure buffer module. The damping vibration reduction module has a corrugated damping inner wall combining spring damping and bellows; the gradient throttling module consists of multiple throttling plates with gradient-changing orifice parameters; the pressure buffer module is separated by an inert gas chamber and a liquid chamber containing a stored liquid layer by a gas-liquid separation membrane. Simultaneously, this invention proposes a corresponding fluid-structure interaction optimization method. By establishing a fluid-structure interaction model, the physical effects of the energy dissipator are abstracted into flow resistance, flow rate, and flow capacity parameters, solved using the method of characteristics, and the energy dissipation effect is verified by optimizing structural parameters. This invention achieves multi-structure synergistic energy dissipation, reducing liquid hydrogen pressure fluctuation amplitude by more than 40%, and is cryogenically resistant and compact, making it suitable for cryogenic liquid hydrogen transportation systems in the aerospace and energy fields.

The present invention belongs to the technical field of saline-alkali land improvement, and discloses an improvement method and improvement system based on saline-alkali land salinity analysis. The method includes: collecting environmental data of the target farming area and soil moisture data at the sampling point in real time, and summarizing into a data set in combination with the sampling point location information; constructing an online real-time monitoring model, with environmental data, soil temperature / humidity and groundwater level as input, and soil conductivity EC and soil pH as output; filling the soil temperature / humidity and groundwater level at non-sampling points with data; using the online real-time monitoring model, with the environmental data collected in real time and the filling data as input, predicting the soil conductivity EC and soil pH at non-sampling points; integrating the sampling point and non-sampling point data to obtain an online monitoring map of soil salinity status, and realizing real-time online monitoring and display of soil moisture data and environmental data at any point in the target farming area; locating the area to be improved according to the online monitoring map of soil salinity status, matching the improvement strategy, and ensuring accurate and efficient improvement.

The invention provides a method for calculating own direction based on multi-point coordinate planning, and the method comprises the steps: converting the longitude and latitude of a target point: obtaining the longitude and latitude of a plurality of groups of reference target points, and converting the longitude and latitude into an XY coordinate form under a radian or rectangular coordinate system through mathematical operation; and calculating the latitude and longitude of the own direction: according to the radian or XY coordinates of the latitude and longitude of the reference target point obtained by conversion, solving to obtain the latitude and longitude of the own direction. Different from single-point linear positioning, the multi-point coordinates are more accurate in the calculation method, so that the longitude and latitude of the own direction are more accurate. In addition, accurate positioning can be achieved only through multiple times of interaction between a terminal and a satellite in traditional positioning, the process is prone to being interfered, positioning is inaccurate or even failed, however, own positioning can be completed only by determining the longitude and latitude of two or three target points, and the positioning efficiency is greatly improved.

The invention belongs to the technical field of dynamic modeling research, and particularly relates to an analytic method for free vibration characteristics of a chain type beam structure containing a conical beam. A conical beam transfer matrix expression based on a Bezier equation form is formed, the obtained transfer matrix expression has good ductility and can be connected with transfer matrixes of other beams with different characteristics, and the free vibration characteristic of the chain type beam structure containing the conical beam is solved based on typical boundary conditions of the chain type beam structure. The method comprises the following steps: acquiring a singular submatrix under a field transfer matrix, deducing to obtain a transcendental equation, solving the equation to obtain a free vibration frequency characteristic of the chain beam structure, obtaining an inherent frequency, reversely substituting the inherent frequency into the transfer matrix, and further solving to obtain a chain beam structure array. Therefore, the inherent characteristic solution of the chain type beam structure containing the conical beam is realized. The method is used for solving the problem that the chained beam structure containing the conical beam lacks analysis and expression.

The application discloses a kind of complex fine-grained sedimentary rock reservoir evaluation method, which comprises the following steps: step 1: the reservoir to be studied as target reservoir;Step 2: target reservoir is stratified according to lithology category and thickness;Step 3: gas-bearing property in target reservoir is analyzed, and favorable stratigraphic system is preliminarily selected according to gas-bearing property characteristics;Step 4: favorable stratigraphic system, carry out stratigraphic system development scale characterization, stratigraphic system reservoir property characterization, organic matter abundance characterization and gas-bearing property characterization analysis, according to reservoir evaluation parameter and the weight corresponding to each parameter and determine the gas-bearing property evaluation index REI value of the stratigraphic system type;Step 5: according to the type of target reservoir, establish the evaluation system of complex fine-grained sedimentary rock reservoir.The application considers the heterogeneity of fine-grained sedimentary rock reservoir internal structure, and proposes a reasonable reservoir property evaluation parameter calculation method.

A seismic optimization design method for frame building structures considering multiple randomness includes: based on the direct probability integral method, the sensitivity formulas of the structural dynamic reliability to the distribution parameters of random variables and deterministic variables are derived respectively, and an efficient and accurate analysis method for the dynamic reliability sensitivity is proposed; the construction cost of the building structure is used as the objective function, and the dynamic reliability is used as the constraint function to construct a frame building structure parameter optimization design framework, and the optimization problem is solved based on the dynamic reliability sensitivity analysis method and the moving asymptote method proposed in the present invention. Compared with the traditional building structure design scheme, the present invention takes into account the random excitation of near-fault earthquake motion that the frame building structure may suffer and the randomness of the structure's own parameters, and provides a design scheme for the frame building structure that takes into account both safety and economy.

A method and apparatus for detecting the working parameters of a forklift includes: 1) obtaining a top-view image of the current forklift; 2) calculating the current pixel distance A1 of a first set of labels and comparing it with the initial pixel distance A0 to determine whether a change has occurred; if so, calculating the distance H1 between the current image acquisition module and the forks according to a first proportional relationship, and proceeding to step 3); if not, calculating the final height H of the current forks as H = H0; 3) determining whether a second set of labels appears in the top-view image; if so, calculating the current pixel distance B1 of the second set of labels in the top-view image and calculating the current height change value H2 of the inner mast according to a second proportional relationship, and proceeding to step 4); if not, calculating the final height H of the current forks as H = X - H1; 4) calculating the final height H of the current forks as H = (X - H1) + H2. This invention only requires the acquired image to calculate the working parameters of the forklift, eliminating the need for sensors and reducing costs.