Abstract: A laser receiving device includes a laser receiving plate, a laser receiving unit, and a first emitting optical adjustment unit. The laser receiving unit is arranged on the surface of the laser receiving plate for receiving echo laser signals. The first emitting optical adjustment unit is arranged on one side of the laser receiving unit for adjusting emission directions of laser beams entering an optical surface of the first receiving optical adjustment unit to the laser receiving unit.

Abstract: This application provides a sensor, including a rotating component rotatably mounted to a base and configured to rotate about a central shaft and an optical component mounted on the rotating component. The optical component has an optical axis that is oblique with respect to the central shaft.

Abstract: A method for using citraconic anhydride and itaconic anhydride as addition cure end caps in reactions for forming polyamic acid oligomers and polyimide oligomers, is provided. Prepregs and high temperature adhesives made from the resulting oligomers, as well as, high temperature, low void volume composites made from the prepregs, are also provided.

Abstract: An augmented reality technology-based handheld viewing device and a method thereof. The device includes a video collecting unit, which is used for capturing a real scene; an intelligent computing terminal, which is used for identifying a two-dimensional code to obtain code value information and space position information, then placing a preset virtual scene according to the space position information, and generating a viewing frame; a voice output unit, which is used for outputting voice information corresponding to the virtual scene; and a liquid crystal display screen. Compared with the prior art, the handheld viewing device can generate a virtual environment that highly matches the real scene and has vivid visual sense, hearing sense, touching sense, force sense, dynamic sense and can realize direct interaction between a user and virtual three-dimensional environment. For a child, more sensory stimulation is available, learning efficiency is improved, and the teaching with pleasure is achieved.

Abstract: An augmented reality technology-based handheld viewing device and a method thereof. The device includes a video collecting unit, which is used for capturing a real scene; an intelligent computing terminal, which is used for identifying a two-dimensional code to obtain code value information and space position information, then placing a preset virtual scene according to the space position information, and generating a viewing frame; a voice output unit, which is used for outputting voice information corresponding to the virtual scene; and a liquid crystal display screen. Compared with the prior art, the handheld viewing device can generate a virtual environment that highly matches the real scene and has vivid visual sense, hearing sense, touching sense, force sense, dynamic sense and can realize direct interaction between a user and virtual three-dimensional environment. For a child, more sensory stimulation is available, learning efficiency is improved, and the teaching with pleasure is achieved.

Abstract: A method for using citraconic anhydride and itaconic anhydride as addition cure end caps in reactions for forming polyamic acid oligomers and polyimide oligomers, is provided. Prepregs and high temperature adhesives made from the resulting oligomers, as well as, high temperature, low void volume composites made from the prepregs, are also provided.

Abstract: A method for using citraconic anhydride and itaconic anhydride as addition cure end caps in reactions for forming polyamic acid oligomers and polyimide oligomers, is provided. Prepregs and high temperature adhesives made from the resulting oligomers, as well as, high temperature, low void volume composites made from the prepregs, are also provided.

Abstract: An augmented reality technology-based handheld viewing device and a method thereof The device includes a video collecting unit, which is used for capturing a real scene; an intelligent computing terminal, which is used for identifying a two-dimensional code to obtain code value information and space position information, then placing a preset virtual scene according to the space position information, and generating a viewing frame; a voice output unit, which is used for outputting voice information corresponding to the virtual scene; and a liquid crystal display screen. Compared with the prior art, the handheld viewing device can generate a virtual environment that highly matches the real scene and has vivid visual sense, hearing sense, touching sense, force sense, dynamic sense and can realize direct interaction between a user and virtual three-dimensional environment. For a child, more sensory stimulation is available, learning efficiency is improved, and the teaching with pleasure is achieved.

Abstract: A method for using citraconic anhydride and itaconic anhydride as addition cure end caps in reactions for forming polyamic acid oligomers and polyimide oligomers, is provided. Prepregs and high temperature adhesives made from the resulting oligomers, as well as, high temperature, low void volume composites made from the prepregs, are also provided.

Abstract: A method for using citraconic anhydride and itaconic anhydride as addition cure end caps in reactions for forming polyamic acid oligomers and polyimide oligomers, is provided. Prepregs and high temperature adhesives made from the resulting oligomers, as well as, high temperature, low void volume composites made from the prepregs, are also provided.

Abstract: Polyimide resins that are suitable for processing by resin transfer molding (RTM) and resin infusion (RI) methods at reduced processing temperatures are provided. The inventive RTM and RI processable polyimide resins exhibit melting at temperatures of less than about 200° C. and melt viscosities at 200° C. of less than about 3000 centipoise. A process for synthesizing the inventive resins is also provided, as is a fiber-reinforced composite material. The fiber-reinforced composite material employs the inventive polyimide resin as its resin matrix and demonstrates good heat resistance and mechanical properties.

Abstract: A method for using citraconic anhydride and itaconic anhydride as addition cure end caps in reactions for forming polyamic acid oligomers and polyimide oligomers, is provided. Prepregs and high temperature adhesives made from the resulting oligomers, as well as, high temperature, low void volume composites made from the prepregs, are also provided.

Abstract: Polyimide resins that are suitable for processing by resin transfer molding (RTM) and resin infusion (RI) methods at reduced processing temperatures are provided. The inventive RTM and RI processable polyimide resins exhibit melting at temperatures of less than about 200° C. and melt viscosities at 200° C. of less than about 3000 centipoise. A process for synthesizing the inventive resins is also provided, as is a fiber-reinforced composite material. The fiber-reinforced composite material employs the inventive polyimide resin as its resin matrix and demonstrates good heat resistance and mechanical properties.