4results about How to "Adaptable to the environment" patented technology

This invention relates to the field of engines, providing an engine intake air preheating method, system, device, and engine. The method includes: acquiring ambient temperature and atmospheric pressure values ​​after the engine is powered on; if the ambient temperature is less than 0 degrees Celsius, heating the air entering the engine through a heating rod, and injecting fuel onto the surface of the heating rod based on a pre-constructed MAP map; after starting the engine, acquiring the engine speed, and if the engine speed is higher than a first set speed, completing the engine intake air preheating. This invention addresses the shortcomings of existing diesel engines in cold starts at high altitudes, enabling the minimum intake air preheating power to adaptively adjust with engine speed, altitude, and ambient temperature during diesel engine startup. It supplements the deficiencies of existing design methods and improves the environmental adaptability of diesel engines.

The application provides a self-repairable EVA adhesive film and a preparation method thereof, and relates to the technical field of solar photovoltaic module packaging. The self-repairable EVA adhesive film realizes a double self-repairing mechanism of photovoltaic module packaging adhesive film through Diels-Alder reaction group grafting and silane coupling agent microencapsulation technology, and the double self-repairing mechanism includes physical rearrangement repair and chemical bonding repair. While maintaining high light transmittance (>= 90%) and bonding strength (>= 96 N / cm), the aging resistance (Delta YI <= 3) and service life of the EVA adhesive film are significantly improved, and the problems that the traditional EVA adhesive film is prone to aging and micro-damage caused by mechanical stress in extreme environments are solved. The preparation process of the application is compatible with the existing production line, and has high industrial application value.

This invention discloses a deformable metal curtain wall based on an adaptive mechanical structure, relating to the field of building curtain wall technology. Flexible rubber frames are installed on both sides of the metal curtain wall panel, and supporting thin steel plates are installed at equal intervals inside the flexible rubber frames. Connecting rubber strips are symmetrically connected to one end of each flexible rubber frame, and limiting rubber blocks are connected to one end of each connecting rubber strip. Assembly notches are symmetrically opened on both sides of the metal curtain wall panel, and clamping vertical plates are installed on the two inner walls of the back of the metal curtain wall panel. This invention utilizes the cooperation between the flexible rubber frames and the stacked supporting thin steel plates to provide a certain degree of offset deformation capability when the building sways and misaligns due to environmental factors such as earthquakes and strong winds. This prevents adjacent curtain wall panels from separating and falling off in the event of misalignment, giving the overall curtain wall a certain degree of environmental adaptability and making installation and use more stable.

The present application relates to high-speed rail uplink communication security technical field, and proposes a kind of RIS assisted high-speed rail uplink communication security method under multiple eavesdropping cooperative attack.Proposing a kind of RIS assisted high-speed rail uplink communication security method under multiple eavesdropping cooperative attack.For the security threat that multiple passive eavesdroppers exist along the high-speed rail and carry out centralized cooperative interception through maximum ratio combination, a two-hop uplink security communication model from high-speed train to dispatching room is constructed: the first hop uses RIS assisted millimeter wave to realize the uplink wireless communication from high-speed rail to relay, and enhances the legal signal and suppresses eavesdropping by regulating RIS reflected signal;The second hop uses power line communication to transmit signal to terminal, and plays the high security advantage of wired link physical isolation.The present application takes the maximization of system average security rate as the goal, and jointly optimizes mobile relay beamforming vector, RIS phase shift matrix and transmission power allocation;Especially for the extreme environment that multiple eavesdropping cooperative interception superposition system only has statistical channel state information, leading to the optimization problem that objective function falls into complex random expectation item which is extremely difficult to solve, introduce deterministic equivalent transformation to convert it into deterministic form, and solve optimal security parameter configuration by combining alternating optimization algorithm, finally execute by hardware controller.The present application effectively breaks through the double obstacles brought by multiple eavesdropping cooperation and channel uncertainty, and significantly improves the anti-interception ability of high-speed rail uplink communication.