Relation Between Texture and Quality Characteristics of Rolled Stock and Control of Continuous Plastic Deformation

Metal Science and Heat Treatment - The relation between the texture parameters suggested earlier for controlling the properties under heat treatment and the quality characteristics of deformable...     

Calculation of the collapse load of an axially compressed laminated composite stringer-stiffened curved panel–An engineering approach

The effective width method that is widely applied for the analysis of isotropic planar stringer-stiffened panels has been extended to laminated composite stringer-stiffened circular cylindrical panels. The approach was modified and adapted to handle curved composite structures.

Panels stiffened by blade type stiffeners, J-form stiffeners and T-form stiffeners were considered in the present study. Bending buckling of the stiffeners, their torsional buckling, combined bending and torsion buckling and local buckling of the stringers were accounted for in the investigation. Using the proposed extended effective width method, a MATLAB based software code TEW¹ was developed and implemented. To validate this code, predictions obtained by it were compared with experimental results and with finite element calculations. Good agreement between the present proposed method, experiments and finite element simulations was found, thus yielding an efficient, simple to apply and fast engineering code to be used in design and optimization stages.     

Power Consumption,Control of Properties and of Continuous Annealing Process of Copper and Brass Rolled Products in Transverse Magnetic Field

Metal Science and Heat Treatment - The characteristics of power consumption are considered depending on the parameters of the billet, on the design of the facility, and on the mode of TFIH...     

Multiple filtration and approximate pattern matching

Given a text of lengthn and a query of lengthq, we present an algorithm for finding all locations ofm-tuples in the text and in the query that differ by at mostk mismatches. This problem is motivated by the dot-matrix constructions for sequence comparison and optimal oligonucleotide probe selection routinely used in molecular biology. In the caseq=m the problem coincides with the classicalapproximate string matching with k mismatches problem. We present a new approach to this problem based on multiple hashing, which may have advantages over some sophisticated and theoretically efficient methods that have been proposed. This paper describes a two-stage process. The first stage (multiple filtration) uses a new technique to preselect roughly similarm-tuples. The second stage compares thesem-tuples using an accurate method. We demonstrate the advantages of multiple filtration in comparison with other techniques for approximate pattern matching.This research was supported in part by the National Science Foundation under Grant No. DMS 90-05833 and the National Institute of Health under Grant No. GM-36230.     

Thermal Expansion of BaO · 2B<Subscript>2</Subscript>O<Subscript>3</Subscript> in the Vitreous and Crystalline States: II. Thermal Expansion of Polycrystalline Barium Diborate Prepared by Crystallization of Glass Powder of the Same Composition

The thermal expansion of polycrystalline barium diborate prepared by crystallization of the glass powder of the same composition is investigated. It is revealed that the dilatometric parameters are characterized by a hysteresis, which manifests itself in a substantial difference between the dilatometric curves upon heating and cooling. The hysteresis characteristics depend on the temperature of preliminary heat treatment during crystallization, the temperature range of measurements, and the direction of the temperature change in the course of dilatometric experiments. It is assumed that transformations of structural modifications occur in the low- and high-temperature ranges and that the quantitative ratio between the modifications in these ranges depends on the temperature.