13 results about "Spherical space" patented technology

The invention belongs to the technical field of three-dimensional reconstruction and robots, and particularly relates to an active viewpoint planning method based on uncertainty driving and information enhancement, which comprises the following steps of: firstly, calculating uncertainty based on a volume occupancy field of a current scene through a spherical uncertainty sampling (SUS) module; mapping to a spherical space to guide the sampling of high-quality candidate viewpoints; then, through a multi-expert information gain network (MEIGN) module, carrying out multi-modal feature coding and fusion on the agent point set sampled in the scene, and accurately estimating the visibility gain of each candidate viewpoint; and finally, selecting the viewpoint with the maximum information gain as the next optimal viewpoint. According to the invention, through effective combination of the sampling strategy and the gain estimation network, the efficiency and accuracy of three-dimensional reconstruction are significantly improved.

The invention provides a mirror reflection effect rendering method and device, electronic equipment and a storage medium, and the method comprises the steps: determining a visual angle vector corresponding to a to-be-rendered pixel point in a mirror model under a world coordinate system; determining a sphere space corresponding to the mirror surface model; determining reflection vectors corresponding to the pixel points based on the sphere space and the view angle vectors corresponding to the pixel points; wherein the reflection vector points to the target intersection point from the sphere center position of the sphere space; the length of the reflection vector is the radius of the sphere space; the target intersection point is the intersection point farthest from the virtual camera in the intersection points of the straight line where the visual angle vector is located and the sphere space; and on the basis of the reflection vectors corresponding to the pixel points, determining sampling coordinates of the pixel points in an environment map of the current scene, and sampling the environment map on the basis of the sampling coordinates to obtain a specular reflection effect. In the mode, the reflection vector has direction and fixed length information at the same time, it is ensured that the mirror reflection effect conforms to the physical law, and the visual immersion of the game is enhanced.

This invention relates to the field of shower head life testing, and more particularly to a device for testing the lifespan of shower head switching and ball head oscillation. The device includes a test frame and a movable component fitted onto the outside of an arc-shaped frame. The test frame includes an arc-shaped frame and positioning rods at both ends of the arc-shaped frame. The positioning rods are axially rotatably fixed to the shower head mounting rod. The movable component moves along the arc-shaped frame. A telescopic rod is connected to the side of the movable component near the positioning rods. A positioning frame is fixed to the end of the telescopic rod, and the interior of the positioning frame is filled with a positioning element made of elastic material. This invention, through the cooperation between the arc-shaped frame and the movable component, combined with the rotatability of the positioning rods, can control the free positioning of the movable component within a spherical space. Combined with the use of a universal ball head fixing method for the shower head, it ensures that the shower head is fixed by the positioning element and can be freely adjusted within the spherical space for testing. Only a random path needs to be set to simulate the uncertainty of human operation.

A time grating sensor for spherical multi-dimensional rotation angle measurement. The time grating sensor comprises a stator base body (1) and a rotor base body (2). The stator base body (1) is spherical shell-shaped, the rotor base body (2) is spherical and located in the spherical shell of the stator base body (1), and a gap is reserved between the surface of the rotor base body (2) and the inner surface of the stator base body (1), so that the rotor base body (2) is suspended and concentric with the stator base body (1). Six excitation units having the same shape and size are uniformly distributed at intervals on the inner surface of the stator base body (1). The centers of the six excitation units are located at the centers of six faces of a cube externally tangent to the inner surface of the stator base body (1). Eight sensing units having the same shape and size are uniformly distributed at intervals on the surface of the rotor base body (2). The eight sensing units are respectively symmetrically distributed on eight quadrants of a space rectangular coordinate system taking the center of the rotor base body (2) as the origin. Also disclosed is a mounting structure for the time grating sensor for spherical multi-dimensional rotation angle measurement. The solution above can realize high-accuracy multi-dimensional rotation angle measurement in a spherical space, simple structure, thorough decoupling, and strong anti-interference capability.

The invention belongs to the field of aircraft structure design, and relates to a structural reliability reevaluation method and device based on spherical decomposition sampling. The method comprises the following steps: S1, determining an observation space and a failure space of an input sample; s2, extracting a sample pool according to the prior distribution of the input samples, and dividing the sample pool into spherical spaces which are not overlapped with each other; s3, calculating a first probability of the observation event alone, a first variable coefficient of the observation event alone, a second probability of the combination of the observation event and the failure event, and a second variable coefficient of the combination of the observation event and the failure event; s4, when the first variable coefficient or the second variable coefficient exceeds a set value, the number of layers of the spherical space with the maximum variance is determined, and the sample size is increased in the spherical space; and S5, calculating a posterior failure probability according to the first probability and the second probability. According to the method, the number of prior samples required for calculating the posterior failure probability is reduced, and the calculation efficiency of structural reliability reevaluation is improved.

This invention discloses a rapid positioning welding jig for spherical nodes in a space frame and its usage method, relating to the field of welded spherical space frame assembly construction technology. It includes a welding base, a member positioning device, an adjustable base for the support rod, a member support rod, and a top support. The welding base is used to place the welded sphere. The member positioning device is sleeved on the welded sphere to achieve precise layout of the contact position between the member and the welded sphere. The adjustable base for the support rod is arranged around the welding base, and the member support rod is installed on the adjustable base. The top support is hinged to the top of the member support rod to support one end of the member. The other end of the member is welded and fixed to the welded sphere. The rapid positioning welding jig for spherical nodes in a space frame provided by this invention and its usage method solve the problems of difficulty in ensuring positioning accuracy, cumbersome installation and dismantling of fixing devices, difficulty in moving them, high construction safety risks, and difficulty in controlling welding deformation in the prior art.

This product is an ice maker for producing spherical ice, and consists of an outer container with an open top and an inner container that has a flange and is separable into two parts, and when assembled, a spherical space for pouring ice-making liquid is formed inside, with the part excluding the flange being housed within the outer container.

This disclosure discloses a method, apparatus, device, storage medium, and program product for drawing spatial lines, relating to the field of computer technology, and particularly to the field of intelligent transportation. The specific implementation scheme is as follows: based on the three-dimensional coordinates of the endpoints of the line to be drawn and the mesh partitioning information of the spherical space, the mesh encoding information of the endpoints is determined; based on the mesh encoding information of the endpoints, a spatial line including the endpoints is drawn in the spherical space. The technical solution of this disclosure improves the efficiency and quality of spatial line drawing.

The invention discloses a heterogeneous collaborative recommendation method and system for multi-geometric interactive embedding and graph convolution comparative learning, and the method comprises the steps: constructing a knowledge graph triple and a user-article interactive graph from original data, extracting head entities from the knowledge graph triple and the user-article interactive graph, embedding the head entities, and mapping the head entities to a Euclidean space, a hyperbolic space and a spherical space; after mapping results of different spaces are unified through tangent space projection, fusion of the different spaces is achieved through cross attention; after fusion is completed, a graph attention network is used for executing attention aggregation of message propagation, geometrical relationship coding and structure perception on an interaction graph, and final representations of the user and the article are obtained respectively. And according to the final representations of the users and the articles, generating predicted scores of all the articles by the target user, and sorting the predicted scores to generate a recommendation list to finish article recommendation.

Disclosed in the present invention is a spherical ice maker, comprising a spherical mold, a refrigeration device, and a water supply apparatus, wherein the water supply apparatus supplies water to a spherical space in the middle of the spherical mold, and the refrigeration device freezes the water in the spherical mold into ice; the spherical mold comprises a first mold and a second mold, each having a hemispherical structure; the first mold and the second mold fit together to form a spherical space; the refrigeration device comprises a compressor, a condenser, a dry filter, a capillary tube and an evaporator that are connected in a loop by means of pipes; a heat exchange network of the evaporator is embedded in a spherical surface of the first mold, and two ends of the heat exchange network extend out of an outer spherical surface on the first mold to form an evaporator inlet and an evaporator outlet, which are respectively connected to the capillary tube and a compressor suction line. In the present invention, the evaporator of the refrigeration device is embedded into the spherical mold, reducing the number of heat transfer stages and increasing device compactness.

This invention relates to a temporary lifting device, system, and lifting method for a spherical node in a space frame, and pertains to the field of construction technology for the overall lifting of welded spherical space frames. It includes a welded sphere, steel sleeves, stiffening plates, and a base plate. Steel sleeves are connected to the top and bottom of the welded sphere, and the bottom steel sleeve is connected to the base plate. A stiffening plate is welded between the base plate and the welded sphere. This invention solves the problems of existing technologies, such as the inability to reuse temporary scaffolding, low utilization rate, long construction period, long rental period for large lifting equipment, high cost, and high safety risks associated with high-altitude operations.

This invention discloses a construction method for the internal support structure of a spherical building, comprising: constructing the main body of the spherical space frame and reserving hanging nodes; dividing the internal support structure along its height into a lower support area, a middle transition area, and a top operating area, and constructing it using a zoned reverse construction method; first installing the lower support area, then assembling the annular ring beam and platform plate of the top operating area into an operating platform unit, lifting the whole to the design elevation and fixing it with the hanging nodes to form a high-altitude work platform; subsequently using this platform to complete the installation of the middle transition area, making the various areas connected to form a whole. This method transforms the permanent top structure into a construction platform, completely replacing full-span scaffolding, significantly saving on scaffolding material rental, transportation, and labor costs, avoiding the impact of scaffolding loads on the floor slabs, and freeing up internal working space. It is particularly suitable for renovation or cross-construction projects where the main structure is already enclosed, the space is cramped, and there is no large hoisting channel.