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In this paper, we formulate a two-stage distributionally robust (DR) model for the optimal power flow (OPF) problem in the presence of uncertainties from wind power generation and load-based reserves. Assuming ambiguous distributions of the random variables, we minimize the costs of generation, reserves, and the worst-case expected value of the penalty cost of violating constraints. We consider a...
Aggregations of electric loads, like heating and cooling systems, can be controlled to help the power grid balance supply and demand, but the amount of balancing reserves available from these resources is uncertain. In this paper, we investigate data-driven optimization methods that are suited to dispatching power systems with uncertain balancing reserves provided by load control. Specifically, we...
Smart building becomes popular these years. It enables many interesting applications, for example, elderly monitoring and remote healthcare. Sensitive information protection in the smart building system is always required, security is thus one important component in such system. So far, many security mechanisms are proposed, however, the study on the balance of security and usability is still lacking...
Dielectric permittivity of [111]-oriented Pb(Mg1/3Nb2/3)O3-PbTiO3(PMN-PT) single crystals with various PT content and phase were investigated as a function of temperature and applied DC electric field. The temperature dependent dielectric permittivity with different PT content showed various dielectric anomalies, revealing different ferroelectric phase at room temperature. The dielectric permittivity-electric...
Dielectric permittivity of [111]-oriented Pb(Mg1/3Nb2/3)O3-PbTiO3(PMN-PT) single crystals with various PT content and phase were investigated as a function of temperature and applied DC electric field. The temperature dependent dielectric permittivity with different PT content showed various dielectric anomalies, revealing different ferroelectric phase at room temperature. The dielectric permittivity-electric...
A dispersion analysis is presented for the Galerkin meshfree formulation of shear deformable beam problem. The meshfree formation employed herein is based on the method of stabilized conforming nodal integration. This formulation can exactly reproduce the bending exactness and more importantly is locking-free. The dispersion analysis is carried out by expressing the nodal variables in a harmonic form...
A Hermite reproducing kernel meshfree method is present for the free and forced vibration analysis of Kirchhoff plates. This formulation provides a straightforward and robust way to construct C1 approximation to investigate the dynamic response of Kirchhoff plates. The Hermite reproducing kernel approximation of the plate deflection is formulated using the deflectional as well as the rotational nodal...
This paper presents an imaging diversity receiver front-end employing select-best method for free-space optical (FSO) communication. The imaging receiver consists of a seven channel transimpedance amplifier (TIA) array and a select-best circuit implemented in a 180 nm CMOS technology. This imaging receiver is designed for flip-chip bonding to a custom InGaAs MSM (metal-semiconductor-metal) photodetector...
Optical wireless (OW) communication links are emerging as a promising broadband wireless access technology. This paper presents an analog front-end receiver that is designed to overcome challenges faced by high-speed optical wireless links requiring wide field-of-view (FOV), high dynamic range imaging receivers for signal acquisition/ tracking. This receiver employs a capacitive feedback transimpedance...
Optical wireless (OW) communication links are emerging as a promising broadband wireless access technology. This paper presents a transimpedance-limiting amplifier (TIA-LA) analog front-end to overcome challenges faced by high-speed optical wireless links requiring wide field-of-view (FOV), high dynamic range imaging receivers for signal acquisition/tracking. The front-end amplifier presented consists...
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