3406results about How to "Targeted" patented technology

The invention provides a brain wave analysis method. The method uses classical time-frequency domain analysis and principal component analysis methods to solve the problem of electroencephalographic feature extraction, successfully extracts time-frequency domain parameters closely related to the tension, fatigue and relaxation of human bodies, maps the time-frequency domain parameters into principal component space, and uses a support vector machine to efficiently analyze non-linear relation in the principal component space so as to improve the accuracy and validity of interpretation.

The invention discloses a quad-rotor UAV fault tolerance control method based on an adaptive fault estimation observer, and belongs to the field of aviation aircraft control. The method comprises thata fault model of a quad-rotor attitude system is established according to a dynamic model of a quad-rotor UAV by considering a performer fault of a UAV system; a performer of the UAV includes four rotor motors in practicality, faults correspond to the four rotor motors, the fault model is processed, the faults are divided into two groups decoupled mutually, and a final attitude fault model is obtained; according to the provided fault model, the adaptive fault estimation observer is designed, corresponding adaptive laws are provided, the performance fault is estimated, and an H(infinite) method and an interval matrix method are used on external disturbance and parameter nondeterminacy respectively in the design process; and an attitude system error fault model is obtained on the basis of the fault model, a dynamic output feedback fault tolerance controller is designed on the basis of a fault estimated value, and fault tolerance control of the quad-rotor UAV is realized. Influence of the performer fault on performance of the quad-rotor UAV can overcome, and the safety and reliability of the UAV in the flight process are ensured fully.

The present invention discloses a double-output shaft active passive upper and lower limbs rehabilitation training mechanism, including a DC machine and a rack, and the DC machine is disposed on the rack, output shaft of the DC machine is provided with a force sensor with one terminal connecting with output shaft of the DC machine, another terminal of the force sensor is connected with a second shaft, the second shaft is disposed with a upper limbs rehabilitation training mechanism and a first bevel gear that meshing with a second bevel gear, a second straight gear meshing with a first straight gear is disposed on a first shaft connected with the second bevel gear, a lower limbs rehabilitation training mechanical arm is disposed on a third shaft connected with the first straight gear, output shaft of the DC machine is provided with a third straight gear meshing with a fourth straight gear, the fourth straight gear is provided with magneto-rheological damper.

The invention discloses a PD-1 gene recombinant virus. The collection number of the recombinant virus Lenti-PD-1-Puro is CCTCC No:V201601. According to the PD-1 gene recombinant virus, PD-1gRNA sequences are cloned into a retrovirus plasmid Lenti-CRISPR / Cas9-Puro, and a PD-1 recombinant virus plasmid Lenti-CRISPR / Cas9-PD-1-Puro is obtained; then the PD-1 recombinant virus plasmid Lenti-CRISPR / Cas9-PD-1-Puro, a plasmid pSPAX and pMD2.G are jointly transfected by 293T cells, and packaging of the recombinant virus Lenti-PD-1-Puro is completed. After T cells of peripheral blood of tumor patients are infected by the PD-1 recombinant virus, PD-1 on the T cells is successfully knocked out, the inhibitory state of the T cells of the tumor patients is relieved, the capacity of attacking tumor cells of the T cells embellished by the PD-1 recombinant virus is recovered accordingly, and the effect of immune cell treating is achieved.

The invention relates to a non-contact measurement method for thermal state sizes of forgings, in particular to a method for measuring the sizes of the forgings by using strip structured light, and belongs to the field of high-temperature forging size measurement,. The method comprises the following steps of: dividing the forgings into a square class and a cylindrical class, then calibrating internal and external parameters of a first CCD camera and a second CCD camera, and building a coordinate relation of the cameras and an external viewing field; projecting the strip structured light to the high-temperature forgings; acquiring images of the high-temperature forgings projected by the strip structured light by an image acquisition system; processing the acquired images; quickly extracting feature points of the associated forging size by analyzing shape characteristics of the edge of the structured light on the cylindrical and the square forgings; combining calibration results of the first CCD camera and the second CCD camera to carry out three-dimensional modeling on the feature points of the forgings; and calculating the forging size and partial form and position errors of the forgings. The method adopts the binocular vision technology to shoot the images of the high-temperature forgings in real time, is quick and accurate in measurement, and can meet the requirements of industrial forging and stamping production.

The invention belongs to the technical field of punching machines, and relates to a full-automatic feeding device of a punching machine. The full-automatic feeding device comprises a loading table and a feeding mechanism, wherein the loading table and the feeding mechanism are controlled by a controller to act. The loading table is specifically and structurally characterized in that a rotary table is fixed on a rotating shaft which is driven by a power unit and arranged on a rack; more than two positioning groove sets are evenly distributed in the same circles in the rotary table, wherein the radii of the circles are the same, and the circles are drawn around the same center; each positioning groove set is formed by two arc grooves which are arranged in a spaced mode; a positioning rod is arranged in each arc groove; a positioning rod positioning device is arranged on the lower side of the rotary table; a material position is formed between the two positioning rods of each arc groove set; a hole or groove used for an ejector bar to penetrate through is formed in each material position; the ejector bar driven by the power unit to act is arranged on the lower side of the hole or groove. The full-automatic feeding device of the punching machine has the advantages that materials are convenient to pile, take and feed, the degree of automation is high, and the full-automatic feeding device is applicable to the punching machine.

The invention belongs to the technical field of biology and particularly relates to a miRNA145-5p-modified umbilical cord mesenchymal stem cell exosome and preparation and application of the miRNA145-5p-modified umbilical cord mesenchymal stem cell exosome. The invention provides a preparation method of the highly-miRNA145-5p-expressed umsc-exosome (umbilical cord mesenchymal stem cell exosome) and application of various biological preparations for accelerating full-thickness skin defect healing and antagonizing scar contracture. The preparation method of the exosome includes (1), adopting fresh umbilical cords to culture human umbilical cord mesenchymal stem cells; (2) preparing mesenchymal stem cells highly expressed in miRNA145-5p; (3), storing conditional media; (4) performing exosome extraction and purification. The highly-miRNA145-5p-expressed umbilical cord mesenchymal stem cell exosome is transferred into a full-thickness wound model of rat backs by serving as a biological preparation, so that skin granulation tissue proliferation can be promoted effectively, wound healing is accelerated and scar contracture can be antagonized; novel approaches and novel methods are provided for wound treatment.

The invention discloses an intelligent English teaching system which includes a teacher terminal, a server and a student terminal. The teacher terminal and the server are connected via the Internet, and the server and the student terminal are connected via the Internet. The teacher terminal includes a human-computer interaction module, a teacher communication module, a difficult problem answering module, a task allocation module, a student assessment module, a voice / video call module, and a courseware sharing module. The student terminal includes a human-computer operation module, a student communication module, an individual intensive training module, a comprehensive training module, an oral English training module, a difficult problem summary module, a measurement and control module, a voice / video call module, a learning material call module, and a custom module. The sharing of English teaching resources and learning resources is realized. Targeted training is realized. The learning efficiency and learning interest of students are improved.

The invention discloses an interactive live broadcast method and device. The method comprises: in a video data live broadcast process, obtaining the interactive feedback information of a first user in real time, wherein the first user is the user watching live broadcast; determining a corresponding target object of the interactive feedback information in live broadcast video data; displaying the interactive feedback information pointing to the target object in the live broadcast video data; sending the interactive feedback information to a second user corresponding to the target object, allowing the second user to adjust live broadcast contents according to the interactive feedback information, wherein the second user is the user executing live broadcast; and broadcasting the live broadcast video data after live broadcast content adjustment. The invention discloses an interaction and live broadcast integrated interactive live broadcast method, which can clearly display interactive information in the live broadcast video data, and enrich live broadcast video data contents.