37results about How to "Narrow down the collection" patented technology

The invention provides a silicon-on-insulator radio frequency switching device and a manufacturing method thereof, comprising: forming a first oxide layer, a first single-crystal silicon layer, a second oxide layer, a second single-crystal silicon layer, The third oxide layer and the mask layer; the first opening and the second opening are formed by etching the mask layer, the third oxide layer, the second single crystal silicon layer and the second oxide layer; Epitaxial growth in the opening makes it consistent with the surface of the second single crystal silicon layer; etching mask layer, third oxide layer, second single crystal silicon layer, second oxide layer and first single crystal silicon layer are formed The first trench, the second trench and the third trench; deposit plasma oxide into the three trenches to form a shallow trench isolation structure; remove the third oxide layer and the mask layer; Body contact devices are formed on the two monocrystalline silicon layers. Compared with the prior art, the parasitic capacitance and the collection of positrons can be reduced, the floating body effect is suppressed, and the breakdown voltage is improved at the same time.

The invention discloses a delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation. The method comprises the steps that (1) a space-time code set is extracted to acquire a characteristic quantity set; (2) a parallel matrix and characteristic quantity function value vector quantities are calculated; (3) characteristic quantities are pre-estimated according to the characteristic quantity function value vector quantities to acquire a new space-time code set and a noise power estimation value; (4) the parallel matrix is whitened to acquire a solution correlation matrix; (5) the time-delay correlation norm of the solution correlation matrix is calculated; (6) a time-delay correlation matrix of code patterns in the new space-time code set is calculated; (7) time-delay relevance vector quantities are calculated according to parameters in the fifth step and the sixth step; (8) a code pattern corresponding to an element with the minimum value in the time-delay relevance vector quantities is chosen as a judgment code pattern. The delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation overcomes the defect that the complexity of a system in the prior art is high due to the large calculation, widens the identification range of an existing space-time code blind identification method, and can be used for a space-time code pattern used at a blind identification sending end.

This application discloses a method and device for locating open-circuit faults of sub-modules of MMC converters. This application divides sub-modules that may have faults to be detected into two groups of input and removal, and judges the phenomenon of current interruption in each control cycle. Whether it exists or disappears, if the bridge arm current exists, judge the polarity of the bridge arm current, and constantly exclude the normal submodules in the set of submodules to be detected, thereby reducing the set of submodules to be detected, and finally locate the faulty submodule, through selective Ground switching of normal or faulty sub-modules to be identified can speed up the troubleshooting and location of faulty sub-modules in the face of a single fault, improve the efficiency of sub-module positioning, and solve the cumbersome process of the existing open-circuit fault location method, which is difficult to execute The long period leads to the technical problem of low positioning efficiency.

The present invention relates to a binocular visual environment detection system and method based on tactile perception, the system at least includes a robot body for archaeological excavation, the robot body includes a camera device, a tactile sensor and a processor, and the processor is controlled by The configuration is: based on at least two visual images with parallax values ​​collected by the camera device, the statistical characteristic loss regions adjacent to each other are divided to form a curved path for the robot body to walk, and the curve paths related to the curved path are determined by the The tactile information collected by the tactile sensor is associated with the prior information to generate a set of statistical feature points on the surface of the object, so as to compensate the features of the lost area of ​​the statistical properties to extract image edge feature points.