6 results about "Foreign technology" patented technology

The invention relates to a composite liquid armor based on pure silica nanoparticles derived from sea sand and its production method. In our invention, composite liquid armor can be utilized in both military and civilian defense industries. Alongside its durability, the armor offers high performance, enables ease of movement, and features a lightweight, free-particle modular structure. By providing a domestic alternative, it reduces dependency on foreign technologies in this field.

The present invention belongs to the field of infrastructure technology, specifically a construction method for a subway underground excavation station project. The construction technology of the subway underground excavation station project is initially developed through research methods such as technical investigation, theoretical analysis and numerical simulation, advanced geological prediction, field experiments and field tests, induction and summary, technical refinement, and reference to a large number of foreign technologies. At the same time, the current status of similar engineering and technical research and application at home and abroad is also fully grasped. Furthermore, the causes of excavation accidents are analyzed. Based on various investigations and analyses, a detailed research outline and work plan are formulated. Furthermore, theoretical analysis and numerical simulation methods are used to study the surrounding rock stress redistribution and displacement distribution law and the force characteristics of the support structure during the pilot tunnel excavation process; so that the construction technology of the subway underground excavation station project in the present invention can be carried out quickly and safely step by step during execution, ensuring the completion time and quality.

The present application relates to the field of polymerized rosin, more specifically, it relates to a zinc-free polymerized rosin and a preparation method thereof. A zinc-free polymerized rosin comprises the following raw materials: masson rosin, inorganic acid, zinc chloride, solvent, oxaloacetic acid, and phosphotungstic acid; the inorganic acid is 0.6-1% of the mass of masson rosin, the zinc chloride is 2.5-4.5% of the mass of masson rosin, the solvent is 75-85% of the mass of masson rosin, the oxaloacetic acid is 0.04-0.08% of the mass of masson rosin, and the phosphotungstic acid is 0.04-0.08% of the mass of masson rosin. The zinc-free polymerized rosin provided in this application can not only maintain a high yield of the product, but also thoroughly remove zinc residues, which helps to break the foreign technology monopoly, enhance the overall competitiveness of the domestic ink industry, and contribute to the healthy development of the national economy.

The invention provides an application system and an application method of a flight simulation training data packet, and belongs to the technical field of aviation simulation training. The system comprises a data acquisition module, an engineering data packet processing module, a training data packet generation module, an error verification module and an adaptive output module. According to the method, an engineering data packet is constructed by arranging aircraft design data and wind tunnel data, a training data packet meeting the standard of a CAAC full-motion D-level simulator is formed after flight experiment correction, and the error is controlled within 5%. The system realizes localization of flight simulation training data packets, breaks through foreign technical monopoly, guarantees national defense safety, improves training fidelity and economical efficiency, and can be widely applied to the field of civil aviation and military aircraft simulation training.

The invention belongs to the technical field of chip manufacturing, and discloses a collecting device for a chip manufacturing process, which comprises a shell and a collector positioned in the shell. According to the present invention, the first channel, the second channel, the third channel and the gas outlet pipe are arranged in the housing; a gas mixture enters the first channel, firstly diffuses all around to enter the second channel, flows downwards along the second channel, enters the third channel from the side wall of the lower end of the collector and the bottom of the collector, flows upwards in the third channel, enters the upper end of the gas outlet pipe, and finally flows downwards along the gas outlet pipe to be discharged; the flow path of the gas mixture is reasonable, the contact time of the gas mixture in the collecting device is long, and a good condensation collecting effect is achieved. According to the invention, the dependence on foreign imported equipment and parts is greatly reduced, the foreign technical monopoly is broken, and the production cost of chips in China is greatly reduced.

The invention discloses an oil-filled submarine cable insulating oil axial channeling leakage blocking method. The method comprises the steps that permeation grooves are cut in the two sides of an insulating oil leakage point outside an armor layer through a grooving machine; a plugging device composed of a sleeve, a plugging sleeve, a guide sleeve, a strip-shaped felt and a flange is installed, the sleeve is used for plugging an outer insulating oil leakage point of the armor layer, and the plugging sleeve is used for constructing an outer sealing cavity of the armor layer at permeation grooves in the two sides of the outer insulating oil leakage point of the armor layer; the pipeline is connected with an air injection port, and the air is used for providing a space without insulating oil and seawater for the sealant; a high-permeability sealant and a low-permeability sealant are injected to construct a lead sheath outer sealing ring belt, the lead sheath outer sealing ring belt is used for blocking the insulating oil from leaking along a gap between the lead sheath and the armor layer, and compared with the prior art, the continuity of the oil-filled submarine cable body is not damaged, the problem of insulating oil leakage along the axial direction is thoroughly solved, and the service life of the oil-filled submarine cable is prolonged. The repair cost is reduced, the repair period is shortened, and foreign technical monopoly is broken through.