Water immersion method bubble detection method based on machine vision

The invention provides a bubble detection method based on machine vision. The key to detection of tiny bubbles is the resolution of a camera and distinguishing of the tiny bubbles and impurities, on the premise that the resolution of the camera is guaranteed, bubble detection is generally achieved by comparing morphological characteristics of the bubbles and the impurities such as the area and the radius and setting a threshold value, but the threshold value needs to be modified repeatedly for different measurement environments and different bubble sizes, so that the detection time is shortened. Therefore, misjudgment and missing detection of bubbles are avoided. Compared with the prior art, the method has the following advantages: firstly, through repeatedly calibrating a measurement environment, adaptively adjusting a bubble detection threshold value, filtering interference of impurities in water on micro-bubble detection, and comparing morphological characteristics and optical characteristic ...

Foundation pit deformation multivariate time series prediction method based on ensemble learning

The invention discloses a foundation pit deformation multivariate time series prediction method based on ensemble learning, belongs to the technical field of artificial intelligence and foundation pit deformation prediction, and aims to provide a foundation pit deformation multivariate time series prediction method based on foundation pit historical monitoring data by fully utilizing monitoring data of different monitoring contents and different monitoring points in foundation pit construction. According to the method, the foundation pit deformation multivariate time sequence prediction model based on ensemble learning is established, the hyper-parameters of the model are optimized by using a Bayesian optimization method, and compared with a traditional method, the prediction precision is remarkably improved, deformation data of three monitoring periods in the future can be predicted at a time, and the requirement for safe construction of a foundation pit is better met.

Hepatocellular carcinoma liver transplantation prognosis prediction system based on NLR-PLR score

The invention discloses a hepatocellular carcinoma liver transplantation prognosis prediction system based on NLR-PLR scores, and relates to the technical field of liver cancer transplantation prognosis. According to the invention, NLR and PLR calculation is carried out; the method comprises the following steps: drawing an ROC curve, and obtaining NLR and PLR cut-off values according to the ROC curve; grouping according to NLR and PLR cut-off values, marking NLR less than 3.37 and PLR less than 105.96 as 0 score, marking NLR greater than or equal to 3.37 and PLR greater than or equal to 105.96 as 1 score, and adding the two scores as an NLR-PLR score; according to the invention, a joint scoring system is established according to the cut-off value determined by the ROC curve and the survival analysis result, and can be used as another reference standard for selecting liver transplantation receptors besides the UCSF standard.

ECT/ERT double mode-state imaging system cross-type composite array sensor

Full -automatic circular folding fishing net

The utility model provides a full -automatic circular folding fishing net which is individual layer or multilayer structure, contains roof, first diapire and the first side wall at least, roof and first diapire are circular, the first side wall forms the ring form and connects between roof and first diapire, the periphery of the first side wall is equipped with a plurality of first income oral areas, the roof is equipped with an income oral area, the periphery of roof is equipped with floating collar, the periphery of first diapire is equipped with a plurality of first counter weights, the middle part of first diapire is equipped with first bait pocket, therefore, the utility model discloses a full -automatic circular folding fishing net simple structure, convenient to use can automatic float and expand with the aquatic, and practice thrift the space, is convenient for transport and remove.

Coating slurry for catalyst as well as preparation method and application of coating slurry

The invention relates to tail gas catalysis, in particular to coating slurry for a catalyst as well as a preparation method and application of the coating slurry. The preparation method comprises the following steps: 1) mixing a cerium-zirconium solid solution, lanthanum modified gamma-Al2O3 and water with the pH value of 3-4, and carrying out ball milling; (2) adding aluminum sol dry powder dissolved by water into the feed liquid obtained in the step (1), and continuously carrying out ball milling; and (3) adding noble metal salt into the feed liquid obtained in the step (2), and stirring to prepare coating slurry. The preparation method of the coating slurry for the catalyst solves the problems of complex slurry preparation process, long stirring time, more additives and high cost of the existing catalyst coating slurry.

Horizontal pipe slug flow parameter measurement method based on independent component analysis and crosscorrelation technology

The invention provides a horizontal tube slug flow parameter measuring method based on independent component analysis and a cross correlation technique. The method introduces the independent component analysis and the cross correlation technique in an electric tomographic imaging system composed of a double-section electric sensor array with the same structure, an electronic measuring circuit andan imaging computing mechanism to realize measurement of horizontal tube slug flow parameters; that is, an independent component analysis method is employed to analyze original measurement data to find that the independent component with the largest kurtosis has good corresponding relation with change information of liquid slug in the slug flow; the cross correlation technique is further employedto perform cross correlation computation after eliminating cyclo-stationary property of the independent component with the largest kurtosis which is obtained by an upstream measurement section and a downstream ...

Sealed siphon drainage system for planting roof

The invention discloses a planting roof sealed siphon drainage system which comprises a wall, a waterproof planting groove with the periphery closed is formed in the upper end of the wall, a water permeable plate is fixedly installed in the waterproof planting groove, and an isolation pipe is fixedly inserted in the water permeable plate; a filter tank, a blow-down valve and a sewage tank are sequentially mounted on the outer wall of the wall body from top to bottom, a pressure relief reset mechanism is jointly mounted between the blow-down valve and the sewage tank, and a siphon drain pipe is hermetically inserted into the side wall of the isolation pipe. Excessive rainwater is discharged through the siphon principle, the situation that the growth of green plants is affected by the too high roof water level is avoided, filtered water is filtered and then discharged and collected, reuse is not affected, automatic operation and closing of sewage discharging and cleaning are achieved through ...

Horizontal pipe slug flow parameter measurement method based on independent component analysis and crosscorrelation technology

The invention provides a horizontal tube slug flow parameter measuring method based on independent component analysis and a cross correlation technique. The method introduces the independent component analysis and the cross correlation technique in an electric tomographic imaging system composed of a double-section electric sensor array with the same structure, an electronic measuring circuit and an imaging computing mechanism to realize measurement of horizontal tube slug flow parameters; that is, an independent component analysis method is employed to analyze original measurement data to find that the independent component with the largest kurtosis has good corresponding relation with change information of liquid slug in the slug flow; the cross correlation technique is further employed to perform cross correlation computation after eliminating cyclo-stationary property of the independent component with the largest kurtosis which is obtained by an upstream measurement section and a downstream ...

A powder type product hot melt adhesive seals bag

The utility model relates to a wrapping bag technical field discloses a powder type product hot melt adhesive seals bag, it includes to seal the bag: the valve port bag and the hot melt adhesive scraps of paper that have the valve port. The hot melt adhesive scraps of paper attach to the back cover strip of valve port bag on the surface, just the hot melt adhesive scraps of paper cover completely the valve port of valve port bag, on the hot melt adhesive scraps of paper with be equipped with the hot melt adhesive on the back cover strip surface contact's of valve port bag the face, be used for sealing the valve port.

Molecular sieve coating slurry for integral catalyst and method thereof

The invention relates to a molecular sieve catalyst, in particular to molecular sieve coating slurry for a monolithic catalyst and a preparation method of the molecular sieve coating slurry. The molecular sieve coating slurry comprises a molecular sieve, polyacrylamide, hydroxymethyl cellulose, acidic silica sol and water; wherein in the molecular sieve coating slurry, the mass ratio of a molecular sieve to water is 1: (1-2.3), and the mass ratio of the acidic silica sol to water is 1: (3-6). The molecular sieve catalyst slurry provided by the invention solves the problems of fast sedimentation, unstable viscosity, easy hole blocking, low adhesive force, long and complex technical process, narrow window and the like.