in this paper, multi-stage optimum design of composite pressure vessels is presented. the design variables for composite vessels include the head shape, the winding angle, the layer thickness, the number of layers, and the stacking sequence. a parameter called modified shape factor is introduced as an objective function. this parameter takes into account the effects of the internal pressure and...

We examine the cosmological information available from the 1-point probability distribution (PDF) of the weak-lensing convergence field, utilizing fast L-PICOLA simulations and a Fisher analysis. We find competitive constraints in the Ωm-σ8 plane from the convergence PDF with 188 arcmin pixels compared to the cosmic shear power spectrum with an equivalent number of modes (` < 886). The converge...

by the method of weight coefficients, techniques of real analysis andhermite-hadamard's inequality, a half-discrete hardy-hilbert-type inequalityrelated to the kernel of the hyperbolic cosecant function with the best possibleconstant factor expressed in terms of the extended riemann-zeta function is proved.the more accurate equivalent forms, the operator expressions with the norm,the reverses a...

In this paper a loop condition is defined which generalizes the cellularity criterion and applies to compacta with nontrivial shape. It is shown that if A", fc E", n > 5, are compacta which satisfy this loop condition and whose shape classes include a space having dimension in the trivial range with respect to n, then Sh(A") = Sh( Y) is equivalent to E" — X « E" — Y. An application is given to ...

Impregnating composition with water-soluble binders has been elaborated, the help of which source deflation mobile sands is blocked, and protective crust obtained on sandy surface characterized by resistance to effects wind-sand flow, assessed plastic strength thickness. The free-flow movement a binder in porous body sand depends mainly equivalent diameter particles joint solution internal exte...

to evaluate the morphological diversity of some almond cultivars and genotypes, an experiment was carried out on 55 iranian and foreign genotypes. twenty-nine quantitative and qualitative characteristics of nuts and kernels as well as 4 phenotypic characteristics of almond trees were evaluated. analysis of variance and means comparisons indicated that all the characteristics of the examined cul...