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

The invention discloses a shortwave direction finding data set labeling method based on least squares positioning. The method first uses the number of intersection points of bearing lines to screen out inferior bearing lines to obtain an initial effective bearing line set of a signal source; then, according to The mean value of the direction-finding error of each direction-finding station relative to the known position signal source is used to correct the measurement azimuth of each station; then, the optimal model of least squares position estimation is established and the optimal position of the signal source is solved by using the trust region algorithm; finally , through robust control, iteratively screen out the azimuth lines with large errors and update the azimuth line set until convergence, and finally obtain the direction-finding station combination corresponding to the effective direction lines in the set, as the most optimal signal source in the direction-finding data set Station Scheme tab. Compared with the traditional all-station fixed direction-finding mode, the invention significantly improves the positioning accuracy of the short-wave direction-finding flexible networking scheme, and reduces the task load of each direction-finding station.

The invention relates to a myopic eyeglass, and belongs to the eyeglass technical field. The myopic eyeglass includes a spectacle lens and a support for supporting the spectacle lens, and is characterized in that the distance between an optical center of the spectacle lens facing a left eye and that of the spectacle lens facing a right eye is smaller than a near pupillary distance of a user, equivalent to the myopic spectacle lens in the prior art combined with a prism with an external base, wherein the spectacle facing the left eye and the spectacle facing the right eye may be separated compound spectacle lenses or compound spectacle lenses united as one, or may be bifocal lenses or multifocal lenses. The myopic eyeglass not only improves the adjustment of the eyes but also improves the binocular gather, improves the observation effect of the eye, and enables the eye to feel comfortable and antifatigue.

The invention discloses a wide screen intelligent presbyopic lens and a preparation mould thereof. The lens comprises a front surface and a rear surface, the front surface and / or rear surface are free-form surfaces, and each free-form surface comprises a far-view area, a near-view area, a transition area between the far-view area and the near-view area, and astigmatic areas, which are arranged on two sides of the transition area. People who use the presbyopic lens can see things in a far distance or in a near distance, and do not obviously feel a dead zone. The presbyopic lens has the advantages of convenient fitting and indoor multipurpose use. The invention also discloses a preparation mould of the wide screen intelligent presbyopic lens.

The invention relates to a search method of mirror image web pages, which comprises: obtaining reversely linked anchor texts of web pages, computing weights of the anchor texts, according to weights, extracting the anchor texts which are provided with numbers or extracting the anchor texts which are provided with proportions, judging whether the above anchor texts are legal relative to the web pages, determining the web page of the illegal anchor texts and extracting main domains, subdomains, and first page of directory of the web page, then forming a mirror image web pages search set by the extracted web pages and searching mirror image web pages based on the mirror image web pages search set. Simultaneously the invention also provides a search system of mirror image web pages, solves problems of low efficiency of the search method of the prior art, and can simply and rapidly search mirror image web pages and has high efficiency.

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.