53 results about "Field practice" patented technology

The invention discloses an industrial metallurgy dynamic model. The industrial metallurgy dynamic model is made of metal and comprises a coking model system, a sintering model system, a blast furnace ironmaking model system, a converter steelmaking model system, a continuous casting model system and a steel rolling model system, wherein the coking model system, the sintering model system, the blast furnace ironmaking model system, the converter steelmaking model system, the continuous casting model system and the steel rolling model system are sequentially arranged; the coking model system is used for simulating the process that coal carbonization is conducted to produce coke; the sintering model system is used for stimulating the process that iron-containing raw materials, the coke, solvents and water mix and are made into a sphere shape and sintered into blocks; the blast furnace ironmaking model system is used for stimulating the process that iron ores and reducing substances react to obtain pig iron; the converter steelmaking model system is used for stimulating the process that molten iron, scrap steel and iron alloy are made into steel in a converter; the continuous casting model system is used for stimulating the process that the molten steel which is refined in a refining furnace is continuously cast into steel billets; the steel rolling model system is used for stimulating the process that rollers are rotated to change shapes of steel ingots or the steel billets. According to the dynamic model, students can preliminarily know the structure principle and the motion process of industrial metallurgy equipment, teaching can be conveniently and visually conducted, teaching quality can be also improved, and comprehensive ability of the students in the field practice process can be improved.

The invention belongs to the field of teaching application of a virtual reality technology, and provides a virtual learning environment multi-channel fusion display method for field practice teaching,which comprises three steps of content generation, audio-visual channel fusion and multichannel interaction design. According to the characteristics of teaching contents in a VR learning environment,a set of generation method from data acquisition, knowledge organization and scene switching is established; synchronous updating of audio-visual channels is realized through a space rendering mode;the input and output priorities of each interaction channel are evaluated, and the multi-sensory collaborative interaction of learners in the VR learning environment is completed. Through adding of auditory cues and multi-channel user interaction discrimination modes, the VR learning environment fusion display is realized, the sense of reality of a learning environment can be improved, and the immersion experience of participants is improved.

The invention discloses a method for mounting a prestressed T-shaped girder at sea by non-rotating synchronous hoisting of double cranes. Firstly, two crawler cranes are fixed on a deck of a square barge, a non-rotating synchronous hoisting process is used to take and mount the T-shaped girder, and during the hoisting and mounting process, the mounting position of the T-shaped girder is controlledonly by raising and lowering crane jibs and by adjusting the hoisting distance, so that potential construction safety hazards can be effectively reduced; secondly, two elevating-type track translational vehicles and girder storage pedestals are arranged on the deck and used to complete the transport and storage of the T-shaped girder on the deck; and finally, a total of four windlasses are arranged respectively at the left front, front right, back left and back right parts of the square barge, and two winches are mounted at the positions, on one side of the square barge, corresponding to thetwo crawler cranes, so as to achieve the stability and accurate positioning of the square barge during the process of taking and mounting the T-shaped girder. By field practice, the method for mounting the prestressed T-shaped girder at sea by non-rotating synchronous hoisting of the double cranes is safe, achieves controllable quality, can effectively reduce the construction cost and improve theconstruction efficiency, and can be promoted for being used in similar projects.

The invention belongs to the teaching application field of virtual reality technology, and provides a virtual learning environment multi-channel fusion display method for field practice teaching, including three steps of content generation, audio-visual channel fusion and multi-channel interaction design. According to the characteristics of the teaching content in the VR learning environment, the present invention establishes a set of generation methods from data collection, knowledge organization and scene switching; through the spatial rendering method, the synchronous update of the audio-visual channel is realized; the input and output priority of each interactive channel is evaluated Level assessment, to complete the multi-sensory collaborative interaction of learners in the VR learning environment. The present invention realizes the integrated display of the VR learning environment by adding auditory clues and multi-channel user interaction discrimination methods, which can enhance the sense of reality of the learning environment and improve the immersive experience of participants.

The invention discloses a concrete gravity dam construction teaching model and a construction method thereof. The concrete gravity dam construction teaching model comprises non-overflow dam construction, overflow dam construction, hydraulic tunnel construction and grouting construction, wherein the overflow dam construction comprises overflow weir surface construction and overflow weir gate construction; the hydraulic tunnel construction comprises three stages of drilling and blasting construction, reinforcing mesh construction and concrete lining construction; and the grouting construction comprises dam foundation seepage-proof curtain grouting construction, tunnel backfilling grouting construction and dam joint grouting construction. According to the invention, site and manual practices of concrete gravity dam construction are combined so that the defects of field practices of off campus building sites are made up.

The invention discloses a self-adaptive distance protection method for a double-circuit line of an intelligent substation, belonging to the technical field of the power system automation. The method comprises the following steps of: 1) acquiring electrical quantity information; 2) performing the self-adaptation of a distance protection fixed value under special operating conditions; and 3) performing the self-adaptation of an impedance relay based on fault type recognition. The self-adaptive distance protection method is capable of effectively overcoming the influence of the zero-sequence mutual induction of the double-circuit line on distance protection, and simultaneously solving the problem of the sensitivity of the distance protection in case of a cross-line fault. Furthermore, the method is applied to field practice without increasing the fixed value or increasing secondary circuit connections and communication loads, and thereby has high practicable value.