In this paper, free vibration analysis of a polymer-based nano-composite beam reinforced by boron-nitride nanotubes and subjected on elastic foundation, is studied. Smooth and defect-free nanotubes with uniform and directly- orientated in matrix are intended. Also, nanotubes’ distribution in the thickness direction of beam is regarded as a uniform distribution of the three different targeted on...

This work proposes a rigorous and practical algorithm for quad-mesh generation based the Abel–Jacobi theory of algebraic curves. We prove sufficient necessary conditions flat metric with cone singularities to be compatible quad-mesh, in terms deck-transformation, then develop an on theorem. The has two stages: first, meromorphic quartic differential is generated induce T-mesh; second, edge leng...

L-band SiGe HBT differential amplifiers with multiple bandpass or bandstop performance is presented. It incorporates stacked parallel-resonant circuits into the design of the output load of the differential amplifier to achieve multiple bandpass performance. On the other hand, the stacked parallel-resonant circuits are used between emitters of the differential transistor-pair to achieve multipl...

The representation of decision problems is an extremely challenging task, especially when these problems are wicked, namely they rely on incomplete or conflicting knowledge, they involve several stakeholders with conflicting views and they are closely linked with other decision problems (Churchman 1967). Instances of wicked decision problems occur naturally, for example, in engineering design (...

Sufficient conditions are derived for solutions of a general autonomous system of quad-ratic ordinary vector differential equations to exhibit finite escape times. These results are extended to a matrix Riccati-type differential equation using Kronecker matrix products and a "stacking operator". Finally, these results are applied to a class of models used extensively in population dynamics.

The Euler number of a binary image is an important topological property in computer vision and pattern recognition. This paper proposes a novel bit-quad-based Euler number computing algorithm. Based on graph theory and analysis on bit-quad patterns, our algorithm only needs to count two bit-quad patterns. Moreover, by use of the information obtained during processing the previous bit-quad, the ...