Aerodynamics in turbo-components and matched combustor characteristics relating to the design of ultramicro gas turbines (UMGT) were presented. Some detailed analysis were provided for the effects of heat transfer, tip clearance and geometrical restriction imposed to UMGT flow passages, as well as a leading concept of combustor design to achieve micro flame structure for enhanced efficiency and...

We have computed the light transport in a bre in the geometrical optics approximation. The aim of this study is to compare the performances of single and double clad bres and to outline possible improvements to bre design.

We give canonical forms for a general singular matrix pencil from which several observer design problems are easily solved. The geometrical basis of these forms is emphasized. Algorithms for the robust computation of the needed subspaces are given.

Multilevel spiral inductors are viable means to achieve enhanced inductance when designing in a multiple metallization level environment, as is typical of processes used for fabrication of RFICs. In this paper, analyses and design considerations are discussed for several spiral structures implemented in CMOS and BiCMOS technologies. Design issues considered include the performance effects of ge...

In the design of high Quality factor (Q) micro or nano beam resonators, different dissipation mechanisms may have damaging effects on the quality factor. One of the major dissipation mechanisms is the thermoelastic damping (TED) that needs an accurate consideration for prediction. In this paper, thermoelastic damping of the longitudinal vibration of a homogeneous micro beam with both ends clamp...

In the present research, data extracted from the stress analysis of 46 finite element models, verified using test results obtained from an experimental investigation, were used to study the effect of geometrical parameters on the chord-side stress concentration factors (SCFs) of central and outer braces in uniplanar tubular KT-joints of offshore structures subjected to four different types of i...

often in modeling the engineering optimization design problems, the value of objective function(s) is not clearly defined in terms of design variables. instead it is obtained by some numerical analysis such as fe structural analysis, fluid mechanic analysis, and thermodynamic analysis, etc. yet, the numerical analyses are considerably time consuming to obtain the final value of objective functi...