Abstract: A construction method and system for asset value models in a digital twin engine includes: measuring the level of business importance based on a business model of building energy consumption assets, and constructing a first asset value model according to the business importance; establishing a correlation between the assets and productivity, and constructing a second asset value model according to productivity loss caused by the assets; and calculating the energy use efficiency of a building according to optimal decision variables, predicting the degradation index of the assets through the energy use efficiency, the first asset value model and the second asset value model, and generating a maintenance solution of the assets. The disclosed has ingenious conception and excellent effect, and realizes the accurate evaluation of the asset value by establishing the correlation between the assets and different businesses and different efficiency, generating the optimal and most accurate asset maintenance solution.

Abstract: The present disclosures a projection lamp with quick locking and self-detection functions, and relates to the technical field of projection lamps. The projection lamp includes a body; an upper shell and a lower shell are arranged in the body; a connector is arranged between the upper shell and the lower shell; a light-emitting component is arranged in the upper shell and the lower shell; mounting frames are arranged on two sides of a bottom of the light-emitting component; and the projection lamp further includes a lower quick locking mechanism for connecting and fixing the lower shell to the light-emitting component, an upper locking mechanism for quickly connecting and fixing the upper shell to the light-emitting component, and an upper-shell and connector quick locking mechanism for quickly locking the upper shell to the connector.