6results about How to "The method is simple and efficient" patented technology

A direct current partial discharge signal defect classification method, system, device and medium based on time-frequency feature map visualization analysis optimization comprises the steps of performing first preprocessing on partial discharge original signal data, and dividing the data into a training set, a test set and a verification set; inputting the training set and the verification set into a ResNet-18 classification model for training, and screening three types of key samples based on an output prediction result; constructing an incremental data set according to the three types of key samples; respectively inputting the incremental data set and the combination of the incremental data set and the training set into a ResNet-18 classification model in sequence for secondary training; carrying out the second preprocessing of the to-be-detected partial discharge original signal data, inputting the to-be-detected partial discharge original signal data into the ResNet-18 classification model after the secondary training, and outputting a defect classification result; and secondary training of the ResNet-18 classification model is carried out by using an incremental data set constructed by the three types of key samples, so that the model focuses on learning samples with fuzzy features, high inter-class similarity or located near a decision boundary, and the discrimination capability and prediction precision of the model on complex samples are effectively improved.

This invention belongs to the field of biotechnology, specifically relating to a method for non-invasively infecting Trichogramma wasps using artificial hosts. Wolbachia The method involves first preparing artificial host egg cards, then infecting... Wolbachia Biological materials were inserted into artificial host egg cards, and finally, uninfected eggs were inserted. Wolbachia The parasitism of Trichogramma wasps is sufficient. Compared to microinjection, this method is more convenient and efficient; moreover, the open system with operable artificial hosts allows for the artificial inoculation of Trichogramma wasps with eggs from other insect sources besides parasitoid wasps. Wolbachia It provided a possibility.

The invention belongs to the field of laser cladding and surface engineering, and particularly relates to ceramic particles for laser cladding and a preparation method and application of the ceramic particles. The method comprises the following steps: pretreating ceramic particles, sensitizing the ceramic particles in a tin ion solution, activating the ceramic particles, and depositing a Ni-P coating layer to obtain the ceramic particles for laser cladding. When the ceramic particle for laser cladding is used for aluminum alloy laser cladding repair, particle-matrix wettability and interface metallurgical bonding can be remarkably improved, generation of non-wettability, incomplete fusion and pore defects is reduced, and therefore the compactness and bonding strength of a cladding layer are improved, the agglomeration, sinking and incomplete fusion defects are restrained, and the service life of the cladding layer is prolonged. And the compactness, microhardness, wear resistance and corrosion resistance of the coating are improved. The method has the advantages of mild process, high applicability and easiness in batch production and field repair popularization, and is suitable for surface strengthening and remanufacturing repair engineering of various ceramic / metal combinations.

This invention relates to the field of tobacco processing technology, specifically a method for determining the penetration rate of exogenous additives in tobacco leaves, comprising the following steps: 1) tobacco leaf pretreatment; 2) sample loading of tobacco leaves and exogenous additives: tobacco leaves and exogenous additives are placed in two thin-film mixing tanks, one for experimental groups and one for control groups; 3) application of exogenous additives; 4) heat detection: a calorimeter is used to detect and record the heat changes throughout the entire process, including the application of the exogenous additives to the tobacco leaves, their penetration into the tobacco leaves, and their reaction with reactants in the lower tank after passing through the tobacco leaves; 5) calculation of the penetration rate. The advantages of this invention are: by accurately detecting the heat changes of exogenous additives during the penetration process in tobacco leaves, the penetration rate of tobacco leaves can be characterized in real time and dynamically. It is applicable to the detection of the penetration rate of different types of exogenous additives in tobacco leaves, has a wide range of applications, and is simple and efficient.

The application discloses a multi-mineral rock structure modeling method, device and equipment, relates to the field of rock mechanics, and can model large-scale rock materials with multiple minerals. The method comprises the following steps: detecting the mineral composition of a target rock to obtain the component proportion of multiple mineral components contained in the target rock, determining the anisotropy representation parameter corresponding to the target rock, and the target fractal dimension and target hourglass parameter corresponding to the multiple mineral components; constructing a rock model of the target rock by adopting a bubbling method according to the anisotropy representation parameter and the component proportion; calculating the specified fractal dimension and specified hourglass parameter corresponding to the multiple mineral components in the rock model, and calculating the first difference between the specified fractal dimension and the target fractal dimension and the second difference between the specified hourglass parameter and the target hourglass parameter; and obtaining the target model when the first difference hits a first preset range and the second difference hits a second preset range.

This invention discloses a pressure testing device, a tobacco slurry preparation system, and its applications. The pressure testing device includes a loading mechanism, an automatic pressing unit, a control system, and a pressure sensing mechanism. The loading mechanism contains loose tobacco material, which is pressed to form tobacco slurries. The automatic pressing unit is connected to the loading mechanism and is driven by the control system to press the loose tobacco material within the loading mechanism. The pressure sensing mechanism measures the pressure exerted on the loose tobacco material during the pressing process. Before preparing samples of loose tobacco with unknown properties, the pressure testing device is used to investigate the control parameters for the tobacco slurry preparation process. Experimental tobacco slurries are obtained by pressing the loose tobacco material using the pressure testing device to determine the sample preparation control parameters for achieving uniform density distribution of the material. Then, using the obtained sample preparation control parameters, a different preparation device is used to obtain tobacco slurries for measuring thermophysical parameters.