5results about How to "Easy to demonstrate" patented technology

Display rack (1) consisting of the skeletal structure (10) made of metal, provided with vertical support columns (11, 12, 13, 14), and connecting crosspieces (15,16,17, 18), the vertical support columns provided with mounting sockets (19) for shelves (40), shelves (40) made of metal, provided with mounting brackets (47, 48) adapted for being placed in the shelf (40) mounting sockets (19), wherein the metal skeletal structure (10) is covered by an outer cover (30) made of a material suitable for coating by printing methods, provided with pass-through notches (36) at locations corresponding to the shelf (40) mounting sockets (19).

A multi-functional circumferential angle demonstrator includes a demonstration panel with an annular groove. The demonstrator is characterized by: at least three circumferential sliders slidably disposed within the annular groove; a first protractor rotatably mounted on at least one of the three sliders; and each slider being plugged into and connected to the annular groove. An assembly hole is located at the center of the annular groove; a central slider rotatably disposed within the assembly hole; and a second protractor rotatably mounted on the central slider. The central slider is plugged into and connected to the assembly hole, and the diameter of the assembly hole is equal to the width of the annular groove. An elastic rope is fitted between the central slider and the circumferential sliders. This invention features a simple structure, reasonable design, convenient use, multiple uses, good dynamic demonstration effect, and low cost. It can improve teaching efficiency and quality and is beneficial for promotion and use.

This utility model discloses a digital landscape model demonstration device, relating to the field of digital landscape model technology. It includes a housing with a top plate on top. A base is fixedly mounted on the top of the top plate, and a mounting frame is rotatably mounted on the upper end of the base. A digital landscape demonstrator is detachably mounted on the top of the mounting frame. A curved slide rail is symmetrically fixed to the top of the top plate with the base as the center. Support rods are symmetrically fixed to the side walls of the mounting frame. A T-shaped slide rod is fixedly mounted on the upper end of one support rod, limiting its sliding within the inner wall of one of the curved slide rails. A protruding rod is fixedly mounted on the upper end of the other support rod, sliding within the inner wall of the other curved slide rail. A locking bolt is threaded onto the end of the protruding rod away from the support rod, and the locking bolt movably fits against the side wall of the curved slide rail. Tightening the locking bolt ensures a tight fit against the side wall of the curved slide rail, allowing the device to be angled according to usage requirements, facilitating the demonstration of the landscape model.

The application provides a complementary embedding image encryption method based on an improved cross-coupled mapping lattice, which comprises the following steps: establishing an improved sine cross-coupled mapping lattice model; based on a plaintext image, generating a secret key by SHA-384 and an original image, and calculating model parameters and initial values according to the secret key; detecting the plaintext image, identifying and obtaining airport coordinates, randomly selecting a coordinate point, and obtaining a visual confusion image through a complementary embedding algorithm; iterating the established sine cross-coupled mapping lattice model to obtain a matrix, converting the matrix into a one-bit array, taking the last rxc data to obtain b; distributing an initial matrix and iterating to an appropriate size to obtain a fractal disorder matrix; selecting the first r rows and the first c columns to form a one-dimensional array, sorting the one-dimensional array to obtain an index array; performing synchronous dynamic scrambling and diffusion operations on three channels R, G and B in a color image respectively to obtain a sub-encrypted image corresponding to each channel. The sub-encrypted images are assembled into a final encrypted image C.

A linear motor inverted pendulum experiment box, including experiment box body and box cover, the box cover is hinged to install in experiment box one side, in the experiment box body respectively is provided with control mainboard device, data interface assembly and movement track assembly, the movement track assembly is installed with sliding seat structure, the support vertical tube is detachably or foldably installed in the middle of the sliding seat structure, at least one side of the sliding seat structure is provided with driving device for driving the sliding seat structure to move on the movement track assembly, an angle encoder is installed on the top of the support vertical tube, and the angle encoder is connected with a swing rod. The utility model manufacturing and use cost is lower, use is not limited by site condition, is convenient for experiment demonstration and observation, and is easy to move to different experiment places and demonstrates, and the reuse effect is good.