30results about How to "Does not compromise structural integrity" patented technology

The invention discloses a novel method for modifying graphene with polymer. By introducing polydopamine and combining covalent modification with non-covalent modification, the method increases the stability of the modified product structure under the premise of ensuring the integrity of the graphene structure. Firstly, by utilizing the strong adhesion of dopamine, the dopamine is self-polymerized to form a film on the surface of a graphene sheet, moreover, 2-Bromo-2-methylpropionyl bromide (BiBB) as common initiator for atom transfer radical polymerization (ATRP) is grafted on the dopamine by amidation, at the same time, graphene oxide (GO) is partially reduced by the dopamine (DA), and thereby graphene macroinitiator RGO@PDA-Br is obtained. Polymeric monomer is then added, so that the ATRP of the polymeric monomer is initiated on the surface of the graphene, and thereby a polymer-modified graphene material is obtained. By controlling conditions such as monomer concentration and reaction time, the novel method can obtain modified graphene materials with different densities and chain lengths of polymer grafted on the surfaces, meeting the characteristics of controllable/living ATRP. In addition, the feasibility and universality of the novel method for modifying graphene with polymer put forward by the invention are applicable to various monomers suitable for ATRP.

The invention provides a medical image data generation method and device for artificial neural network training, and the method comprises the steps: building the corresponding relation between the target features of a basic medical image and the image features of an extended image through the self-learning capability of an artificial neural network; wherein the image features comprise texture features and content features; obtaining a current target feature of the current basic medical image; determining an image feature of a current extended image corresponding to the current target feature through the corresponding relationship; specifically, the method determines the image features of the current extended image corresponding to the target features, and comprises the steps: determining the image features of the extended image corresponding to the target features, which are the same as the current target features, in the corresponding relation as the image features of the current extended image, thereby improving the rationality of the generated extended image; details are restored more excellently, and the diversity of features is improved.

The invention discloses a preparation method of a fibroin fluorescent probe. The method comprises the following steps: screening a phage library by using a fibroin material to obtain a phage specifically bonded with fibroin proteins; carrying out gene sequencing; using an amino acid sequence corresponding to the gene obtained by sequencing as a fibroin affinity peptide primary sequence; carrying out polypeptide synthesis on the fibroin affinity peptide primary sequence by adopting a polypeptide synthesis technology to obtain fibroin affinity peptide powder; and bonding the fibroin affinity peptide powder with fluorescein to obtain a fibroin fluorescent probe. The phage screened by the invention has very high affinity to the fibroin material, is high in probe sensitivity, high in detection speed and wide in application prospect, and provides more choices for high-efficient targeting and identification of the fibroin protein and the fibroin material.

The invention provides a flaky acoustic black hole energy harvester set device which comprises a plurality of acoustic black hole energy harvesters and an energy harvester set lower bottom face sealing plate. The multiple acoustic black hole energy harvesters are sequentially connected in an attached mode and fastened with the energy harvester set lower bottom face sealing plate. The flaky acoustic black hole energy harvester set device has lots of adjustable parameters, has the good vibration reduction effect and is suitable for solving the problem of low-frequency vibration, the covering frequency range is wide, and the defects of low structural strength and weak bearing performance of traditional acoustic back holes are overcome. In vibration reduction application, the multiple energy harvester set devices can be arranged in a flat laid mode, and the acoustic black hole energy harvesters with the different structural sizes and parameters can be combined at will; the functions of devouring and capturing of vibration of the designated frequency band are conducted on the basis of not destroying the structural integrity and not reducing the structural strength and safety; designingcontrol over low-frequency vibration, medium-frequency vibration and high-frequency vibration can be achieved through the flaky acoustic black hole energy harvester set device; and the acoustic blackhole energy harvesters are small in additional mass, the implementing method is simple and flexible, and the acoustic black hole energy harvesters can be combined at will to adjust the energy absorption efficiency.

The invention provides a transformer digital self-adaptive protection device and method based on pressure features. The device comprises a transient oil pressure feature quantity measuring module, a switching quantity input module, a signal modulation and collection module and a digital core module, wherein the transient oil pressure feature quantity measuring module is connected with the signal modulation and collection module; and the signal modulation and collection module and the switching quantity input module are connected with the digital core module. The transient oil pressure digitalinformation of a plurality of measuring points inside an oil tank is obtained in real time; an action pressure value representing the oil pressure amplitude is obtained through operation; a protectioncriterion and threshold value setting method is built by using the obvious differences of the feature quantity under different operation conditions of a transformer; the reliable fast and sensitive discrimination and elimination of faults inside the oil tank of the transformer can be realized; and no influence is caused by excitation inrush current. Meanwhile, the fault state self-adaptive and threshold value self-adaptive protection scheme is designed so as to accelerate the protection action speed.

The invention relates to the technical field of metal-based composite materials, and particularly discloses a boron-doped graphene reinforced copper-based composite material and a preparation method thereof. According to the copper-based composite material, the boron-doped graphene serves as a reinforcement body, the bonding interface of copper and graphene is effectively increased, interface electron transmission is improved, boron doping is carried out on a complete graphene sheet layer, the structural integrity of the graphene is basically not damaged, the electron transmission performance of the boron-doped graphene is better, meanwhile, a Cu-B-C bond can be formed between the graphene and a copper substrate, and interface bonding and electron transmission are both considered. According to the preparation method, processes such as graphene doping, mixing of a copper raw material and a reinforcement body and heat treatment are combined, and the copper-based composite material with uniformly distributed boron-doped graphene is successfully prepared, experiments prove that the tensile strength of the boron-doped graphene reinforced copper-based composite material is not lower than 308.6 MPa, and the conductivity of the boron-doped graphene reinforced copper-based composite material is not lower than 90.6% IACS.

The invention discloses an interactive teaching device for English teaching, and the device structurally comprises a placement groove frame, a sound production module, a data strip, a recognition pen, and a display, so that when the device is used, through the arrangement of a placement groove frame mechanism, the problems can be avoided that a book easily slides on a desktop when the book is placed, and when a recognition pen scans and recognizes a book or during page turning, one end of the book needs to be pressed by a hand or a tool, and inconvenience is caused. A book side edge pressing area is clamped through a movable clamping block device, the book side edge pressing area is not prone to generating redundant sliding on a groove plate, and meanwhile, when the book is browsed and learned, the book pages slide in along the clamping plate device, and at the moment, the book pages are fixed in an auxiliary manner through mutual matching of the insert block device and the clamping plate device, so that the structural integrity of the book pages is not damaged while the book pages are prevented from being directly reset and closed, and more convenience is achieved.

The invention discloses a full-bearing-type pure electric business purpose vehicle structure which comprises a full-stamping part front wall, a full-stamping part top cover, a rectangular pipe side wall, a full-stamping part back wall and a truss type chassis assembly. The full-stamping part front wall and full-stamping part back wall skeletons are connected into a whole through the full-stampingpart top cover arranged at the upper portion, rectangular pipe side wall vehicle bodies arranged at the two sides and a truss type chassis assembly arranged at the lower portion to form a whole vehicle box type skeleton vehicle body assembly. The structure has the beneficial effects that compared with a semi-bearing vehicle body, the whole strength of the full-bearing vehicle body is higher; the full-stamping part vehicle body structure is low in mass and good in strength; a chassis front section, a chassis middle section, a chassis back section and a chassis tail section on the truss type chassis assembly are manufactured at the same time, after the sections of the chassis are spliced, the sections and the side walls are welded and fixed to form the whole vehicle body skeleton, and the problems that installation is difficult and the precision is not high due to the buckling procedure are avoided. According to the business purpose vehicle structure, no bin door needs to be formed in the side walls, and the vehicle body structure integrity is not damaged.

A mullion connection system for resisting wind load reactions using a connection clip structurally engaged with a mullion without a hole or a fastener penetrating into the mullion surface. The connection clip can undergo stress-free vertical sliding relative to the mullion along the entire length of the mullion without impairing the structural connection strength; therefore, the building construction tolerance in the vertical direction is eliminated as a design consideration of the curtain wall system. The design also eliminates the need for pre-fabricating mullion holes for the connection locations. The design does not require the pre-determination of the elevation of the connecting point and thus is most beneficial for a curtain wall renovation project where the available locations in the building structure for structural connection cannot be determined prior to the demolition of the existing wall. The uninterrupted mullion tube cavities can be conveniently utilized for inter-floor distribution of utility lines.

The invention discloses a hollow wood-plastic plate with a sealing head structure. One or two ends of the hollow wood-plastic plate is/are provided with a mounting surface/mounting surfaces, sealing head plates and the mounting surfaces are connected through a plurality of air row nails, glue is pasted between the sealing head plates and the mounting surfaces, and each sealing head plate is formedby cutting a whole wood-plastic plate the same as the hollow wood-plastic plate in material. By means of the hollow wood-plastic plate, one or two ends of the wood-plastic plate can be sealed with the sealing head plates as required, the connection strength of the hollow wood-plastic plate and the sealing head plates is large, the sealing head plates are not prone to falling off, and the servicelife is long. The sealing head plates do not damage the structural integrity of the hollow wood-plastic plate and do not affect the appearance of the hollow wood-plastic plate.

The invention provides an oil tank externally-pasted liquid level switch detection method based on guided waves. The method comprises the following steps that 1, a guided wave excitation element and a guided wave sensing element are pasted to the outer side of an oil tank; 2, when the liquid level of the oil tank does not reach the detection height, collecting and storing a guided wave signal; 3, when the liquid level of the oil tank changes, whether the liquid level of the liquid in the oil tank reaches or not is judged according to the guided wave signal, and therefore the guided wave excitation element and the guided wave sensing element are pasted to the position, needing to be detected, of the liquid level on the outer side of the oil tank; whether the liquid level reaches the detection height or not is known by comparing the energy change rate between the guided wave signal when the liquid level does not reach the liquid level detection height and the guided wave signal when the liquid level changes with a threshold value, and therefore the method has the advantages that holes do not need to be formed in the oil tank wall, and the structural integrity of the tank wall is not damaged.