Abstract: An error correction method and device for a line structured light 3D camera. The method comprises: placing a 3D calibration plate at different positions in the field of view of the 3D camera, and allowing a relative motion to scan the 3D calibration plate to obtain multiple sets of point cloud data at different positions; processing the point cloud data and calculating corner coordinates of the 3D calibration plate corresponding to each set of point cloud data; constructing an error correction model by using an inclination angle, caused by an error, between a straight line along which the relative motion direction lies and a laser plane of the 3D camera as an error model correction parameter; calculating error correction model parameters according to a space vector constraint relationship between corner points; and applying the model to the point cloud data of a measured object to obtain distortion-free point cloud data.

Abstract: A method for enriching carbon dioxide and hydrogen by water-gas shift coupling of blast furnace gas is disclosed in the present application, belonging to the technical field of flue gas resource utilization, where the method includes: purifying the blast furnace gas by a dry purification method, followed by heating and mixing with water vapor, allowing for water vapor shift coupling reaction under an action of a catalyst to obtain a mixed gas of carbon dioxide and hydrogen; adsorbing the mixed gas of carbon dioxide and hydrogen with a carbon dioxide adsorbent and desorbing to obtain carbon dioxide; introducing a gas not adsorbed by the carbon dioxide adsorbent into a molecular sieve adsorbent to remove impurities, then obtaining a hydrogen. Blast furnace gas is used as raw material, and hydrogen is provided for subsequent hydrogen smelting while realizing carbon enrichment in the blast furnace process.

Abstract: An electronic device may display, by using a viewfinder picture in an augmented reality (AR) application interface, an object that is in the real world in which a user is located and that is collected by a camera. The user may enable, by performing an operation, the AR application to generate a mask in an area in which a first object is located in the viewfinder picture to block the first object. Then, a three-dimensional representation of a second object is projected onto the mask, where the second object is in a field of view range of the area in which the first object is located.

Abstract: A web page clustering method and device, used for clustering web pages according to a web page framework, the method including: acquiring uniform resource locators (URL) of a plurality of web pages to be clustered; for the URL of each web page to be clustered, determining rewriting rules of the URL and classifying the URL according to the rewriting rules of the URL; determining a web page framework of the web page corresponding to each URL in each URL class, and determining whether each URL may be clustered according to the web page framework of the web page corresponding to each URL; and retaining the URL class if each URL may be clustered.

Abstract: A web page clustering method and device, used for clustering web pages according to a web page framework, the method including: acquiring uniform resource locators (URL) of a plurality of web pages to be clustered; for the URL of each web page to be clustered, determining rewriting rules of the URL and classifying the URL according to the rewriting rules of the URL; determining a web page framework of the web page corresponding to each URL in each URL class, and determining whether each URL may be clustered according to the web page framework of the web page corresponding to each URL; and retaining the URL class if each URL may be clustered.