4results about How to "Reduce aggression" patented technology

The invention relates to a preparation method and application of an oxidation-resistant MXene material with a defect ordered hexagonal hole structure, and the preparation method comprises the following steps: mixing MAX phase Ti3AlC2 with hexagonal holes, CuCl2 and NaCl, loading into an alumina corundum square, covering with a NaCl salt bed boat, putting into a muffle furnace, and carrying out constant-temperature sintering at 820 DEG C in an air atmosphere for 3 hours; the method has the advantages that the process is simple and reasonable, a barrier for resisting attacks of oxygen molecules and water molecules is effectively constructed under the combined action of trace metal oxides on the surface of the MXene material, and the oxidation resistance of the MXene material is remarkably improved.

The present invention relates to C23C18, and more specifically, to a stable tin chemical plating solution and its application. The raw materials for preparing the plating solution include stannous salt, organic acid, thiourea accelerator and reducing agent, and the organic acid includes C1-C5 organic acid. The present invention provides a chemical plating solution, which can realize continuous tin plating under acidic conditions by using suitable thiourea accelerator and reducing agent, and realize higher smoothness and brightness on the tin layer with higher thickness. By adding suitable dispersant and organic acid, the stability of the plating solution can be improved while reducing the aggressiveness to ink. Through the joint action of the components of the plating solution provided by the present invention, a dense plating layer can be achieved at a faster plating speed, and the solderability of subsequent electronic components such as PCB boards can be improved.

The present invention relates to the technical field of membrane materials, and in particular to a copolymer containing a quinine structure and a preparation method and application thereof. The copolymer containing a quinine structure comprises the structure: #imgabs0#; Y 1 ~Y 5 are each independently selected from aryl, aralkyl, heteroalkyl, alkyl, perfluoroalkyl or absent, Ar 1 ~Ar 5 is independently selected from substituted or unsubstituted arylene, aralkylene, heteroalkylene, alkylene, perfluoroalkylene, heteroarylene or absent, Ar 6 ,Ar 7 R is independently selected from substituted or unsubstituted aryl, aralkyl, heteroalkyl, alkyl, perfluoroalkyl, heteroaryl or hydrogen; 1 ~R 10 Each is independently selected from hydrogen, alkyl, aryl, aralkyl, heteroalkyl, heteroaryl and perfluoroalkyl. The ion exchange membrane material prepared from the copolymer has excellent alkali stability and good conductivity, and the preparation method is simple and easy, and has great application potential in anion membranes of alkaline fuel cells.

The application discloses a kind of self-adapting micro-doppler corner point feature extraction method and device, comprising: it is proposed to use micro-doppler corner point feature to realize through-wall radar human behavior recognition, and gives a kind of self-adapting corner point feature extraction method based on Gauss difference convolution filter and deformable convolution network;Micro-doppler corner point feature is defined as the point that gray scale sharply changes in different directions in radar square distance-time image and square doppler-time image, reflects the inflection point of human body limb node's motion trajectory curve, stationary point, curve intersection and boundary;The corner point feature extraction method proposed uses Gauss difference convolution filter to extract micro-doppler corner point supervision label on simulation data, then trains μD-CornerDet model using these labels;Inference stage, only μD-CornerDet model is used to obtain corner point feature map for measured data;The application verifies the effectiveness and robustness of the proposed method through numerical simulation and measurement.