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The Roll-Ring with a rolling electrical contact is usually utilized in an electrical energy transmission system between two continuous relative rotated equipments, such as the rotation system in radar, tank, space station and so on. As long as the requirement of the transmission power increasing in these years, the rolling electrical characteristic is more and more important for the long-life design...
With the assistances from iteration methodology for heat dissipation property analyses and the effective material properties for the relatively complex PCB structures, this paper extracts the thermal resistance and the transient thermo-mechanical behaviors during reflow for two compactable high power diode packaging through the ANSYS software. After the simulations, further improvements on packaging...
In this paper, we review recent progresses on metal oxide resistive switching memory (RRAM). RRAM device design is explored from different aspects including oxide/electrode materials, uniformity issues, and scaling down to single-digit-nm regime. We studied the stochastic nature of resistive switching in metal oxide RRAM and revealed the physics behind switching parameter variations in HfOx-based...
Molecular dynamics simulation is an important and powerful tool in studying physical and chemical properties of materials, in particular, at the nanoscales. Conventional molecular dynamics, as oppose to the ab initio molecular dynamics, adopts the Newton's second law to predict particle position in the next time step with the assistance of empirical interatomic potential to calculate the forces between...
This paper gives an overview of recent works on metal oxide resistive switching memory (RRAM). We explored the stochastic nature of resistive switching in metal oxide RRAM and a 2-D analytical solver was established to explain the switching parameter variations in HfOx-based RRAM. As an example of application beyond digital memory/storage, AlOx-based RRAM was explored for neuromorphic computing.
In 1997, H{\aa}stad showed $\NP$-hardness of $(1-\eps, 1/q + \delta)$-approximating $\maxthreelin(\Z_q)$; however it was not until 2007 that Guruswami and Raghavendra were able to show $\NP$-hardness of $(1-\eps, \delta)$-approximating $\maxthreelin(\Z)$. In 2004, Khot--Kindler--Mossel--O'Donnell showed $\UG$-hardness of $(1-\eps, \delta)$-approximating $\maxtwolin(\Z_q)$ for $q = q(\eps,\delta)$...
With the enforcement of "Circular Economy Promotion Law", extended producer responsibility has become the important institution of China's circular economy. However, incentives for the majority of producers are lacking. This paper starts with EPR's theoretical base, clarifying its environmental goals and responsibility modes. Five promotional factors are deduced, which are improvement potential...
Unitary space-time constellation design is considered for noncoherent multiple-antenna communications, where neither the transmitter nor the receiver knows the fading coefficients of the channel. By employing the Clarke's subdifferential theorem of the sum of the kappa largest singular values of a unitary matrix, we present a numerical optimization procedure for finding unitary space-time signal constellations...
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