In this paper,the vortex-induced vibrations (VIV) of cantilever pipes conveying internal fluid flow subjected to loose constraints are investigated.The full nonlinear partial differential equations of
Fractional derivative provides an important modeling tool in various engineering and scientific fields including viscoelasticity,self-similarity of protein dynamics,groundwater hydrology and anomalous
In order to improve the efficiency of the marine engine and reduce the fuel consumption,the direct exhaust gas turbine power generation system is used to recover the exhaust energy of marine engine.
We propose a novel method of adaptive fractional-order nonlinear system resonance for the bearing fault enhancement.By this method,the amplitude at the fault frequency is obviously amplified so that w
A novel palladium catalyzed selective cleavage of alkynoates for the construction of dibenzo[c,h]xanthene and benzo[h]coumarin derivatives controlled by acid and ligand is reported.Triflic acid(TfOH)a
The carbazole framework exists widely in bioactive natural products and pharmaceutical agents.l Development of new routes to synthesize carbazole structural motifs is meaningful.transition-metal-catal
Comparing with the well-known five-and six-membered nitrogen-containing heterocyclic compounds,the seven-(azepine)and eight-membered(azocine)as well as larger N-containing Heterocyclic systems occupy
Covalent organic frameworks(COFs),due to its high stability,large surface areas,good molecular tenability and excellent optical properties,has become a promising heterogenous photocatalyst for visible
The legendary of Sternbach orchestrates an era of benzodiazepine heterocycles in the history of drug development.In the last five decades,benzodiazepine(1)has been evolved as a privileged platform in
The tetrahydrocarbazole architecture is a privileged heterocyclic ring system.It not only widely exists in various naturally occurring alkaloids and pharmacologically active compounds,but also is feat