In order to investigate the performance of suprathreshold color-difference tolerances with different visual scales and different perceptual correlates, a psychophysical experiment was carried out by the method of constant stimuli using CRT colors. Five hue circles at three lightness (L*=30, 50, and 70) and chroma (C*ab=10, 20, and 30) levels were selected to ensure that the color-difference tol...

Process tolerancing based on the process capability studies is the optimistic and pragmatic approach of determining the manufacturing process tolerances. On adopting the define–measure–analyze–improve–control approach, the process potential capability index (C p) and the process performance capability index (C pk) values of identified process characteristics of connecting rod ...

Electrical-discharge machining (EDM) of advanced ceramics allows the miniaturization parts with complex shapes. Since electrical conductivity is required, non-conductive need a conductive second phase. This work assesses feasibility industrial EDM in yttria-stabilized tetragonal zirconia (3YTZP) composites 20 vol% graphene nanostructures different morphology using energies. The structural integ...

Ahtract -A computer-aided sjnthesis design procedure is given for nonuniform quadrature directional couplers in inhomogeneous media. A wiggly geometry is employed which effective11 slows the odd-mode phase veloci5 to match the even-mode phase velocity. The wiggly geometry results in improved isolation and increased effective dielectric constant. This technique provides a shorter coupler length ...

The application of random fields to real-world problems, e.g. for assessing the robustness and reliability of structural components with geometrical or material tolerances, has gained much interest recently. However, the large number of random variables involved inhibits the use of accurate and efficient methods to compute failure probabilities. Several measures to handle the large dimension or...

Due to the mechanical and beam optics requirements, the geometry of the LHC dipole cold masses is submitted to very tight tolerances (few tenths of millimeters) over the magnet’s length (more than 15 meters). Different parts of the cold mass have to be either measured or properly positioned throughout the assembly (see reference [1]), implying the use of a portable system. The measurement syste...

− The influence of Rockwell and Vickers diamond indenters geometry in hardness measurements justifies the strict specifications and tolerances in the relative standards. Many methods, and consequently dedicated instruments, have been developed to investigate the geometrical parameters in order to calibrate the diamond indenters. Most of them, using contact or contactless methods, can only inves...

In industry, the current practice concerning geometrical specifications for mechanical parts is to include both dimensions and tolerances. The objective of these specifications is to describe a class of functionally acceptable mechanical parts that are geometrically similar. To ensure that their functionality in respected during, assembly designers have to apply tolerance analysis. A model base...

The temperature developed in bondwires of integrated circuits (ICs) is a possible source of malfunction, and has to be taken into account during the design phase of an IC. Due to manufacturing tolerances, a bondwire’s geometrical characteristics are uncertain parameters, and as such their impact has to be examined with the use of uncertainty quantification (UQ) methods. Sampling methods, like t...