5,005 research outputs found
Applying the ARPSO Algorithm to Shafting Alignment Optimization Design
Trial-and-error method for shafting alignment at the initial design stage in the shipbuilding industry is mostly carried out by shipyard designers. However, adjusting of a highly sensitive shaft line within a short period in order to obtain a reasonable positive design value for each bearing
reaction force (load) and bearing pressure for the entire propulsion shafting system is very difficult. Any minor changes in the bearing location and/or off-set design values may cause different analytical results with a large design deviation, such that the fi nal design result may not comply with the classifi cation society requirements and manufacturers’ design criteria.
The innovative ARPSO-SHAALIN design program successfully combines and integrates the Three Moment Equation Method (TMEM) for a continuous beam with the Attractive and Repulsive Particle Swarm Optimization (ARPSO) algorithm. The ARPSO algorithm searches for the values of global optimal design parameter for each bearing off-set and location of the propulsion shafting in the initial design stage in order to create a brand new optimal shafting arrangement. Design results are verifi ed and presented
Testing the Non-universal Z^\prime Model in Bs -> \phi \pi^0 Decay
The branching ratio and direct CP asymmetry of the decay mode have been calculated within the QCD factorization approach in both the
standard model (SM) and the non-universal model. In the standard
model, the CP averaged branching ratio is about .
Considering the effect of boson, we found the branching ratio can be
enlarged three times or decreased to one third %by the effect of
boson within the allowed parameter spaces. Furthermore, the direct CP asymmetry
could reach 55% with a light boson and suitable CKM phase, compared
to 25% predicted in the SM. The enhancement of both branching ratio and CP
asymmetry cannot be realized at the same parameter spaces, thus, if this decay
mode is measured in the upcoming LHC-b experiment and/or Super B-factories, the
peculiar deviation from the SM may provide a signal of the non-universal
model, which can be used to constrain the mass of boson
in turn.Comment: 9 pages, 5 figure
N-[(R)-(2-Chlorophenyl)(cyclopentyl)methyl]-N-[(R)-(2-hydroxy-5-methylphenyl)(phenyl)methyl]acetamide
In the title compound, C28H30ClNO2, the cyclopentane ring adopts an envelope conformation. In the crystal structure, molecules are linked by intermolecular O—H⋯O hydrogen bonds, forming chains running along the a axis
2,4-Dichloro-6-((1R)-1-{[(R)-(2-chlorophenyl)(cyclopentyl)methyl]amino}ethyl)phenol
In the title compound, C20H22Cl3NO, the five-membered ring adopts an envelope conformation, and the two benzene rings are oriented at a dihedral angle of 40.44 (9)°. Intramolecular O—H⋯N and N—H⋯Cl hydrogen bonding is present. In the crystal, the molecules are linked via weak intermolecular C—H⋯O hydrogen bonds
Bis{μ-4′-[4-(quinolin-8-yloxymethyl)phenyl]-2,2′:6′,2′′-terpyridine}disilver(I) bis(perchlorate) dimethylformamide disolvate
In the binuclear title complex, [Ag2(C31H22N4O)2](ClO4)2·2C3H7NO, the AgI atom is pentacoordinated by three N atoms from the tridentate chelating terpyridyl group and by one N atom and one O atom from the quinolin-8-yloxy group in a distorted square-pyramidal geometry with the O atom at the apical position. The centrosymmetric complex cation involves intramolecular π–π stacking interactions [centroid–centroid distance = 3.862 (4) Å] between the central pyridine and benzene rings. In the crystal structure, intermolecular C—H⋯O hydrogen bonds result in the formation of a supramolecular network
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