Abstract: An intelligent Ensemble Kalman Filter (EnKF)-based method and system for real-time inversion of hydraulic fractures is provided. The method includes: conducting real-time sampling on mechanical properties of rocks in a reservoir near a fracturing stage to obtain a rock mechanical property sample set; obtaining a hydrofracturing design parameter sample set according to the rock mechanical property sample set; inputting the rock mechanical property sample set and the hydrofracturing design parameter sample set into a fracture propagation-oriented machine learning model to obtain a predicted fracture propagation state; and obtaining, by EnKF, an updated fracture propagation state according to the predicted fracture propagation state and real-time observation data.

Abstract: An impeller apparatus includes a housing, an impeller, and a heat generation member. The housing includes an air duct formed in the housing. The air duct includes a first air duct and a second air duct successively connected to each other. The second air duct has a non-blocking area. The impeller is arranged in the first air duct. The heat generation member is rotatably arranged in the second air duct and has a blocking state and a non-blocking state. In the blocking state, the heat generation member blocks the second air duct, in the non-blocking state, the heat generation member is accommodated in the non-blocking area and does not block the second air duct.

Abstract: An impeller apparatus includes a housing, an impeller, and a heat generation member. The housing includes an air duct formed in the housing. The air duct includes a first air duct and a second air duct successively connected to each other. The second air duct has a non-blocking area. The impeller is arranged in the first air duct. The heat generation member is rotatably arranged in the second air duct and has a blocking state and a non-blocking state. In the blocking state, the heat generation member blocks the second air duct, in the non-blocking state, the heat generation member is accommodated in the non-blocking area and does not block the second air duct.

Abstract: Provided are a box cover, a water box, a humidification apparatus, and an air blowing device, said box cover including a cover body and a mist outlet passageway running through the cover body, the cover body and the mist outlet passageway are integrally formed. By means of integrally forming the cover body and the mist outlet passageway, and significant reduction of the time required for assembly of a mist outlet tube, while also avoiding the occurrence of water leakage at the joint of the mist outlet tube.

Abstract: A codec comprising a programmed digital signal processor and an accelerator core in which computation of a coding algorithm is divided between the digital signal processor and the accelerator core, computationally relatively intensive parts of a coding algorithm being performed by the accelerator core. In the preferred embodiment, the instruction set is optimised to perform CELP coding of speech signals.