Abstract: The present disclosure provides a successive gas path fault diagnosis method with high precision for gas turbine engines and falls within the technical field of fault diagnosis for gas turbine engines, including the following steps: establishing an engine nonlinear component-level model; capturing dynamic effects of an engine transient maneuver; outputting an estimated value of an engine observation parameter by the engine nonlinear component-level model; acquiring a measurement of the engine observation parameter through sensors; and iteratively updating a degradation factor through a solver. The present disclosure captures the dynamic effects of the transient maneuver at consecutive moments through time-series gas path measurement parameters, thereby realizing successive and high-precision diagnosis for health conditions of the gas turbine engines. This technology can provide a new successive and high-precision diagnosis method for the gas turbine engines under steady-state and transient conditions.

Abstract: The present invention discloses a polymetallocarbosilane from organic metal catalysed polymerization and uses thereof, said polymetallocarbosilane has a structural formula as shown in (I). In the formula, R is methyl, ethyl, propyl, ethenyl, chloromethyl, phenyl or phenethyl; M is Ti, Zr or Hf; m is an integer equal to or greater than 1, n is an integer equal to or greater than 0, and Cp1 and Cp2 are each a cyclopentadienyl or substituted cyclopentadienyl group. The present invention adopts a method for producing polymetallocarbosilane by metallocene catalysed addition polymerization of an organosilane, with adjustability of metal content in polymer, simple reaction steps, mild reaction conditions and low preparation costs.

Abstract: Panels to be engaged with each other through a locking element, comprising board (1) and locking element (2), adjacent said boards (1) engaging with each other through said locking element (2); a groove (3) is formed in the vertical direction at each of the coupling parts of the adjacent strip boards (1); said locking element (2) comprises two tenons (4) extending from the bottom plate of the locking element (2); the positions and the shapes of the two tenons (4) correspond to the said grooves (3); when assembling the said boards (1) and said locking element (2), said tenons (4) are engaged in the grooves (3) respectively, thus the adjacent boards (1) are connected with each other through the locking element (2). The panels to be engaged with each other according to present invention are simple in structure and is easy to install and remove, and therefore could greatly save materials.