Abstract Static mixers (SMs) are widely used in applications that involve chemical reactions, heat transfer, blending of fluids, or some combination these. Accurately evaluating the performance SMs is critical for appropriate selection these devices. Traditional approaches parameters separately evaluate mixing level and energy spent (i.e., pressure drop) but do not account both simultaneously. ...

Abstract We have proposed a block sparse approximate inverse with cutoff (BSAIC) preconditioner for relatively dense matrices. The BSAIC preconditioner is effective for semi-sparse matrices which have relatively large number of nonzero elements. This method reduces the computational cost for generating the preconditioning matrix, and overcomes the performance bottlenecks of SAI using the blocke...

In this paper, we develop widely linear transmit strategies for two-way relaying networks with single or multiple pairs of users and a MIMO amplify and forward relay. By taking advantage of the noncircularity of the complex-valued transmitted signals, a significant performance gain is obtained over linear transmit strategies when SNR balancing or relay transmit power minimization is chosen as t...

Understanding phenomena such as evaporation and imbibition of picoliter droplets into porous substrates is crucial in printing industry to achieve a higher quality print speed. After printing, the residual pigment must remain fixed at desired location on substrate be volume yield high resolution vibrantly printed page that has become expectation modern technology. Current research entails not o...

This paper has a double purpose. In the first part of the paper we give an overview of different aspects of graph theory which can be applied in communication engineering, not trying to present immediate results to be applied neither a complete survey of results, but to give a flavor of how graph theory can help research in optical networks. The second part of this paper is a detailed example o...

We consider a three-dimensional liquid drop sitting on a rough and chemically heterogeneous substrate. Using a novel minimization technique on the free energy of this system, a generalized Young’s equation for the contact angle is found. In certain limits, the Cassie and Wenzel laws, and a new equivalent rule, applicable in general, are derived. We also propose an equation in the same spirit as...

This paper proposes a new full-order adaptive observer algorithm to overcome the instability of speed sensorless vector control system induction motor at low speed, especially extremely speed. The consists improved feedback matrix and law algorithm. By establishing an state error equation considering non-linear voltage inverter stator resistance drop, was designed reduce effect inverter's drop ...