Abstract Aluminium alloy (Al7075) based hybrid metal matrix composites reinforced with Silicon carbide (SiC) and Tungsten (WC), at 5 wt% each are considered for this investigation, which developed by stir casting methodology. Material characteristic analysis both micro macro (Tensile strength hardness) level were performed. This investigation is further progressed drilling of the using titanium...

Aerodynamic drag of fast-moving train has significant impact on its fuel consumption and design safety. To improve aerodynamic performance, the forces surfaces must be reduced. Train’s front-end nose boundless geometrical variations that can applied for improved performance. Three geometric characteristics were used in present research: A-pillar roundness, length controls shrinking, bluntness. ...

The paper studied weeds classification system using BP neural network and 6 shape parameters (the ratio of the width and the length, complete degrees, the roundness, the rectangle, ratio of the framework proportion and frame perimeter) based on such characteristic parameters as weed leaf area, perimeter, minimum bounding rectangle, circumcircle, equivalent oval as input feature vectors; and mea...

The paper reveals the superfi cial matching between script features as understood by forensic experts and computer scientists and advocates the development of computational instruments tailored to fi t the features traditionally used by the forensic community. In particular, and including other areas of graphonomics and the general public, there exists a demand for software for the analysis of ...

In contrast to the widely used mean-line based evaluation techniques, the capabilities of morphological methods are not fully recognized in practice. Morphological operations, e.g. dilation, erosion, closing and opening, are useful tools in surface metrology and dimensional metrology. This paper presents a variety of novel applications of morphological operations in association with several of ...

Introduction Glacial erratic boulders are plucked from bedrock by flowing ice, transported in the direction of ice flow, and deposited at the terminus of the glacier. If derived from a localized, distinctive region of bedrock, glacial erratics may be used as indicator stones to map the direction of ice flow. Furthermore, glacial erratics evolve during transport, becoming smaller and more rounde...

In this paper, micro-hole drilling in ambient air is presented using fs fiber laser (750 fs & 1030 nm). Micro holes were fabricated in both transparent (glasses) and non-transparent materials (metals and tissues). Hole shape and morphology was characterized and evaluated with optical microscope and scanning electron microscopy (SEM). Debris-free micro holes with good roundness and no thermal da...