36results about How to "Fast and accurate evaluation" patented technology

The invention discloses an on-orbit satellite image geometric positioning accuracy evaluation method on the basis of multi-source remote sensing data. The on-orbit satellite image geometric positioning accuracy evaluation method comprises the following steps: Step 1, regulating an image to be evaluated and a reference image into two images under the condition of the same spheroid, datum plane and resolution; Step 2, carrying out down-sampling on the two images and carrying out radiometric enhancement; Step 3, carrying out rough matching on the two images by using an Surf (Speed up robust features) algorithm and removing mismatched dot pairs by epipolar geometry; Step 4, according to a rough matching result, carrying out geometrical relationship compensation on the image to be evaluated and carrying out accurate blocking on the image to be evaluated, which is subjected to geometrical compensation, and the reference image; Step 5, aiming at block pairs of the image to be evaluated and the reference image, carrying out precise matching by using the Surf algorithm and removing mismatched dot pairs by epipolar geometry; Step 6, calculating external geospatial positioning accuracy and calculating internal geospatial positioning accuracy according to the screened direction control dot pairs. The on-orbit satellite image geometric positioning accuracy evaluation method can realize automatic, rapid and accurate evaluation on multisource high-accuracy remote sensing images from different sensors, different spectral regions and different time phases.

A device (100) for processing an input signal (102), the device (100) comprising a delay unit (104) adapted for delaying the input signal (102) by a predefined delay time, at least one phase shifting unit (106) each adapted for phase shifting the delayed input signal (108) by an assigned phase value, a plurality of mixer units (110) each adapted for mixing the input signal (102) with the delayed input signal (108) or with one of the at least one phase shifted signal (112), and an extraction unit (114) adapted for extracting information from each of the mixed signals (116).

The invention discloses a rapid evaluation method for the electrochemical corrosion resistance of a metal bipolar plate coating of a fuel cell, comprising the following steps: firstly, obtaining the contact resistance data of the coating after different corrosion times under a constant potential; then comparing the obtained contact resistance value to Perform exponential regression on the corrosion time, or perform linear regression on the logarithmic value of the contact resistance against time to obtain the corresponding growth coefficient of the potential; then introduce the contact resistance measurement error function; then combine steps 1, 2 and 3 to obtain the contact resistance and corrosion potential , corrosion time, to achieve the purpose of off-line test to quickly evaluate the electrochemical corrosion resistance of the metal bipolar plate coating of the fuel cell. The method of the invention can quickly evaluate the method and improve the performance evaluation accuracy; the method of the invention evaluates the tolerance of the coating to different corrosion potentials; the equipment adopted in the invention is simple and easy to control, and reduces the time and cost of online service testing.

The invention discloses a quick evaluation method and system for susceptibility to post-earthquake secondary geological disasters. The method comprises the steps of determining evaluation indexes of the susceptibility to the post-earthquake geological disasters, digitizing each evaluation index, conducting discretization on continuous variables to obtain sample points in sample areas, calculatingthe occurrence proportion of the geological disasters within discrete partitions corresponding to the evaluation indexes to determine the corresponding fitting functions of each evaluation index, inputting values of each evaluation index in each sample point into the corresponding fitting functions to obtain sensitivity calculation results, determining an evaluation model of an quick evaluation ofthe susceptibility to the post-earthquake secondary geological disasters, for any to-be-evaluated points, substituting the sensitivity calculation results corresponding to each evaluation index of the to-be-evaluated points into the evaluation model, the closer an acquired value is to 0, the less likely the evaluation point is to have the post-earthquake geological disaster, and the closer the acquired value is to 1, the more likely the evaluation point is to have the post-earthquake geological disaster. By means of the method, the accuracy of an evaluation of the susceptibility to the post-earthquake secondary geological disasters is improved.

The invention discloses an image measuring method for evaluating oil pipe pitting behaviors. By means of the corrosion weight loss method and the micro-measurement technology, a proper datum plane is built on the surface of a slide through a coating method, proper temperature, proper pressure and a proper medium are selected, different corrosion time is controlled, the number and the size of pitting generated on the surface of the slide are effectively controlled, then large-scale image scanning is conducted on the slide through a measurement microscope, image information of a metal surface at the same position before corrosion and after corrosion is compared, and accordingly evaluation in the aspects of generation and development positions of pitting on the surface of an oil pipe, the number, the pit size and appearance is achieved. Relative information of a large amount of pitting can be obtained qualitatively and quantitatively, important bases are provided for researching generation and development of the oil pipe pitting behaviors, and the method has important research and application value.

Embodiments of the present invention provide a neural network-based evaluation method and device for microscopic pore structure of reservoirs, the method comprising: acquiring core pore structure data obtained based on high-pressure mercury injection experiments on cores, and obtaining core pore structure data corresponding to the core pore structure data category; according to the core density and the density curve in the logging data, the core depth is aligned with the logging depth to obtain the logging data corresponding to the core, and continue to obtain the pre-processed logging data; the pre-processed logging data is used as Input and the category of the core pore structure are used as output to train the initial neural network model to obtain a trained neural network model; when it is necessary to evaluate the reservoir microstructure of the target well, input the target well logging data into the trained The neural network model can obtain the pore category corresponding to the target logging data, and can accurately and quickly evaluate the microscopic pore structure of the reservoir.

The invention provides a portable water and soil conservation benefit evaluation device based on a water and soil loss calculation equation. The device comprises a shell, a control unit in the shell and a remote data server, wherein the control unit uploads obtained data to the remote data server through a wireless network and comprises a data processing unit, a storage unit with a database, a wireless communication unit and a GPS navigation unit, wherein the storage unit, the wireless communication unit and the GPS navigation unit are respectively in communication connection with the data processing unit. According to the invention, the water and soil loss calculation equation is combined with the water and soil conservation benefit evaluation, the water and soil loss evaluation value of a piece of land is obtained by calculating the water and soil loss quantity of the land under different water and soil conservation measures, and the water and soil loss situation can be quantitatively evaluated in a scientific and normative manner; moreover, the water and soil conservation measures for the land can be evaluated under three conditions.

The invention discloses a bionic moisturizing model and an evaluation method thereof, a constant temperature box, a water tank placed in the constant temperature box, and a bionic membrane component placed above the water tank; the bionic membrane component includes a test layer and a bionic membrane. The bionic moisturizing model of the present invention can simulate biological skin, has a moisturizing effect test conclusion consistent with the biological skin model, and can perform quantitative evaluation on the product to be tested, and can be used to study the influence of different components on moisturizing effect and quantify Evaluate it accurately, provide data support for formula design of moisturizing and emollient products, and apply it to guide formula screening, and provide faster screening methods and theoretical support for product formula design.

A method for judging the uneven operation of the hearth of a blast furnace, which collects the actual tapping and slag information of each furnace of molten iron in the blast furnace, and records the tapping times of the blast furnace, the actual amount of iron tapping, the actual amount of slag tapping, the tapping time, Slagging time, taphole depth, molten iron temperature, molten iron composition, and then calculate the iron flow rate and slag seeing rate at each tapping, and remove the data during the blast furnace ditch repair period to establish the daily slagging and iron tapping of each taphole of the blast furnace Information, according to the actual iron output, actual slag output, silicon content, molten iron temperature, iron flow speed and slag seeing rate conditions of the target iron hole, to judge whether there is uneven work in each iron hole of the blast furnace. The present invention is based on the slag discharge parameters of each tap hole during each tap, combined with the uniformity of air supply at the lower tuyeres and the setting of furnace top material distribution, diagnoses the uniformity of the hearth, and finds out the unevenness of the hearth The reason is to optimize the tapping system, air supply system and cloth system, which is fast and accurate.

The invention discloses an evaluation method for image quality of a near-to-eye display optical lens. The evaluation method for the image quality of the near-to-eye display optical lens is suitable for the fast detection in commercialized production. The evaluation method for the image quality of the near-to-eye display optical lens includes that letting an experimenter observe a sample lens with performance parameters, extracting the group of physical parameters relatively sensitive to the visual perception of a human eye through a counting mode, quantizing the group of physical parameters to obtain a parameter interval corresponding to an image quality capable of being received by the human eye, and using the parameter interval as a subjective evaluation standard. The evaluation method for the image quality of the near-to-eye display optical lens uses a suit of evaluation devices for the image quality of the near-to-eye display optical lens to quickly detect the optical lens to be measured to obtain the physical parameter quantized values and compare the results with objective measured values to build a relationship between the subjective and objective. A quick detection system which has built the relationship can precisely and quickly evaluate the image quality of the optical system according to the detected lens parameters and subjective evaluation standard. By means of the technical scheme, the evaluation method for the image quality of the near-to-eye display optical lens is capable of quickly and precisely evaluating the imaging quality or performance of the optical lens, and the method is very convenient to use.