4,039 research outputs found
Hamiltonian function selection principle for generalized Hamiltonian modelling
AbstractHamiltonian function is different, the internal structure relation given by generalized Hamiltonian model is different, and thus Hamiltonian function is core issue for generalized Hamiltonian modeling. In this paper, three principles of selecting Hamiltonian function are proposed, interface principle, energy principle and stability principle. For the class of system with single input and single output, applied methods of three principles are given. At last, the Hamiltonian modelling for nonlinear hydro turbine is taken as case to introduce its application
2-[HyÂdroxy(4-methÂoxyÂphenÂyl)methylÂidene]indane-1,3-dione
In the title compound, C17H12O4, there is an intraÂmolecular O—H⋯O hydrogen bond. The dihedral angle between the indane ring system [maximun deviation = 0.023 (2) Å] and the benzene ring is 37.42 (9)°
4,6-DimethylÂpyrimidin-2(1H)-one–urea–water (1/1/1)
In the crystal structure of the title compound, C6H8N2O·CH4N2O·H2O, molÂecules are linked via N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds, forming a three–dimensional framework
Ethyl 8-(4-nitroÂphenÂyl)imidazo[1,2-a]pyridine-7-carboxylÂate
In the title compound, C16H13N3O4, the imidazo[1,2-a]pyridine and benzene rings make a dihedral angle of 56.21 (2)°. The crystal packing is stabilized by weak π–π stacking interÂactions [centroid–centroid distances = 3.787 (2) Å] and C—H⋯O interÂmolecular hydrogen-bonding interÂactions
4-(4-Oxopent-2-en-2-ylÂamino)-1,2,4-triazol-1-ium-5-thiolÂate
In the title compound, C8H12N4OS, an intraÂmolecular N—H⋯O hydrogen bond links the imine N atom to the oxo O atom. In the crystal, molÂecules are linked by interÂmolecular N—H⋯O and N—H⋯S hydrogen bonds, forming a two-dimensional framework
The effect of berberine on insulin resistance in women with polycystic ovary syndrome: detailed statistical analysis plan (SAP) for a multicenter randomized controlled trial
A Visualization method for machine translation evaluation results
PACLIC 20 / Wuhan, China / 1-3 November, 200
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