8results about How to "Speed advantage" patented technology

The invention relates to the field of sponge materials, and provides an antibacterial degradable sponge material and a preparation method thereof. The material is prepared from protocatechuic acid modified quaternized chitosan, quaternary ammonium salt grafted gelatin, sodium alginate, polyhydroxybutyrate, polycaprolactone, a polylactic acid-glycolic acid copolymer, hexamethylene diisocyanate, a foaming agent, nano cellulose, vitamin E, polyethylene glycol, triethylamine and dimethylformamide. Protocatechuic acid and quaternized chitosan are subjected to amidation modification, and chitosan and gelatin are subjected to quaternization treatment by adopting 2, 3-epoxypropyl trimethyl ammonium chloride, so that the antibacterial property and biodegradability of the material are improved. In the material preparation process, through vacuum degassing, foaming vacuum degree and humidity control and a multi-step drying process, it is ensured that the average pore size of the material is uniform (50-200 microns) and the porosity is high (50%-90%), and the obtained material has excellent antibacterial property and degradability and has wide application value.

The invention relates to the technical field of sliding mode control, in particular to a double-sliding-mode sensorless control method based on a PMSMS, and the method comprises the steps: setting a terminal sliding mode surface function, optimizing the rotating speed through a nonlinear control item, and introducing a variable gain coefficient; a Sigmoid function is introduced in combination with an approaching law in the design of a speed controller; the terminal sliding mode controller takes the given speed and the estimated rotating speed error of the motorized spindle as the input and takes the q-axis current as the output; carrying out stability analysis on the speed ring controller; the sliding-mode observer takes an actual current value and an observer current error as input, takes the speed and position information of an electric spindle rotor as output, improves buffeting of a sliding-mode control law in combination with a Sigmoid function, and is integrated with a phase locking ring for extracting the position and speed of the rotor; and carrying out stability judgment on the design of the sliding-mode observer. The problems of overshoot, buffeting, slow response and the like of a control system in practical application of a traditional sensorless control scheme are solved.

This application relates to a stacked interlocking semiconductor packaging structure, comprising: a substrate, a base plate, two chips, a packaging layer, and a protective shell; the substrate is disposed on the top surface of the base plate, and two chips are disposed on the substrate, with the packaging layer encapsulating the chips and the substrate; the protective shell is disposed on the top surface of the base plate and surrounds the sidewalls of the packaging layer; the protective shell includes: two or more stacked rings, each ring having a limiting groove on its inner sidewall, and the packaging layer having multiple limiting protrusions on its sidewalls, the limiting protrusions matching the limiting grooves for embedding within the limiting grooves. The protective shell surrounding the packaging layer effectively isolates and protects the packaging layer, preventing damage caused by direct exposure of the packaging layer's sidewalls to the outside. This application utilizes a stacked, interlocking ring structure to reliably complete the packaging process of microelectronic components or semiconductor devices; the overall structure is simple and easy to manufacture; it has significant advantages in terms of process speed and cost.

The present invention relates to an object classification and object segmentation method based on 3D point cloud information, which belongs to the field of 3D point cloud processing, and particularly to the field of difficult processing of disordered point clouds and difficult extraction of point cloud features. In order to extract more effective information in extracting point cloud features, the present invention proposes and uses a new joint global feature and local feature structure. When extracting high-dimensional features, a new extraction mechanism is proposed to replace the traditional symmetric function. A large number of experiments have shown that the neural network we designed can solve a variety of point cloud tasks, including but not limited to object classification, object segmentation, scene segmentation, etc. The beneficial effects of the present invention: the designed point cloud recognition and segmentation algorithm mainly designs a new Mix‑Net dedicated neural network design, and innovates from multiple modules such as downsampling algorithm, feature value extraction and fusion mechanism, which significantly improves the accuracy of point cloud recognition and segmentation.

The utility model relates to a tire distribution type inflation and deflation system, belongs to the technical field of automobile tire inflation pumps, and solves the problems that in the prior art, an inflation and deflation system is high in cost due to a complex air path, maintenance and replacement are convenient, and trafficability and economical efficiency are difficult to balance when power supply of an inflation and deflation control system and all tires are driven and braked. The integrated modular design is adopted, the tire inflation and deflation system is embedded in the hub motor, the system comprises the cylindrical cavity and the space separation compression unit, and the space separation compression unit is arranged in the cylindrical cavity and can rotate in the cylindrical cavity. And the cylindrical cavity is divided into a plurality of pump cavities with different volumes by the space division compression units, and the volumes of the divided pump cavities can be changed in the rotating process, so that air in the divided pump cavities is compressed. The system further comprises an electric brush ring and a balance control method, and the electric brush ring leads a power supply of the hub motor to the system so as to supply power to the system.

The invention relates to the technical field of near field communication, and discloses an interaction system and an interaction method of terminal equipment and access control equipment, the terminal equipment in the interaction system comprises a reading module and a chip register, and the reading module is configured to read data information of a plurality of access control cards; the chip register is configured to store data information of a plurality of access control cards; in a host card simulation mode of the terminal equipment, the chip register is configured to control the plurality of access control cards to be automatically switched; the NFC card reader of the access control equipment is configured to read data information of a plurality of access control cards stored in the terminal equipment, and the identification module is configured to identify whether the data information of the access control cards is legal or not; and the controller is configured to control the access control equipment to open or close the door. The interaction method is applied to the interaction system. According to the method and the device, card switching can be automatically carried out during entrance guard card swiping, so that a user can quickly open a door without manual intervention, the card swiping efficiency can be improved, the use experience of the user can be improved, and the cost can be saved.

The invention belongs to the technical field of automation, and discloses a device sorting system based on an image recognition technology, which comprises a mechanical arm, the mechanical arm is a multi-degree-of-freedom mechanical arm, a mechanical claw and a camera are arranged on the mechanical arm, and the device sorting system further comprises a server connected with the mechanical arm, the mechanical claw and the camera, an image processing and recognizing module, a coordinate conversion module, a mechanical arm motion planning module, a mechanical arm control module, a mechanical claw control module, a data recording and analyzing module and a user interaction interface are arranged in the server; the method is high in automation degree and high in recognition precision, and effectively improves the device processing efficiency.

The present invention proposes a social worker robot simulation method for loan investment network fraud, which belongs to the field of artificial intelligence / social engineering. Specifically: first, set up a number of social worker robots with different attributes according to actual needs, and configure user attributes for each social worker robot; fill in the micro-loan application form on each loan platform according to the attribute value, and leave the personal information of the social worker robot to the fraudster; then, build a behavior, language and voice database that conforms to the basic personality of the social worker robot, as well as a fraud process archive; then, the social worker robot interacts with the fraudster, and retains all information in the database; when the fraudster induces the social worker robot to transfer money, the social worker robot sends a transfer failure picture with a Trojan program implanted, tracks the fraudster and traces the source and feeds back to the public security department. The present invention is simple to operate and has strong practicality, which greatly improves the implementation efficiency.