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An atomistic Monte-Carlo simulator of TaOX-based resistive random access memory (RRAM) with bi-layered Ta2O5−X/TaO2−X stack is developed by considering generation/recombination (G-R) of oxygen vacancies (VO) with oxygen ions (O2−), phase transition (P-T) between Ta2O5 and TaO2 as well as interactions of Ta2O5−X/TaO2−X stack. The stack induced effects involving changeable Schottky barrier (SB) at the...
We report a fast and efficient method for permanently correcting fabrication-induced phase errors in silicon photonic circuits. The method uses femtosecond laser pulses at 400-nm wavelength to amorphize a thin layer of crystalline silicon near the waveguide surface, thereby inducing a change in the effective index of the waveguide. Using a single femtosecond laser pulse, we reduced the polarization-dependent...
In this paper, we present a new automated algorithm for image completion, i.e., reconstructing the missing, damaged, or occluded parts in images in a visually non-detectable fashion. Our algorithm is capable of recovering both structural and textural information on the damaged parts, by solving several key subproblems such as determining the connections and shapes of the occluded region boundary curves,...
We report laser-guided electric discharges along curved trajectories, and hence around obstacles in line of sight between electrodes. Furthermore, beam self-healing enables direct discharge on target even when the laser beam directly hits the obstacle.
This work introduces the first high-volume manufacturable metal-fuse technology in a 22nm tri-gate high-k metal-gate CMOS process. A high-density array featuring a 16.4μm2 1T1R bit cell is presented that delivers a record low program voltage of 1.6V. This low-voltage operability allows the array to be coupled with logic-voltage power delivery circuits. A charge pump voltage doubler operating on a...
This work introduces the first high-volume manufacturable metal-fuse technology in a 22nm tri-gate high-k metal-gate CMOS process. A high-density array featuring a 16.4µm2 1T1R bit cell is presented that delivers a record low program voltage of 1.6V. This low-voltage operability allows the array to be coupled with logic-voltage power delivery circuits. A charge pump voltage doubler operating on a...
Melt spun Nd-Fe-B based powders have been successfully applied in bonded magnets for a wide variety of modern applications from power tools to automotive devices and computer components [1]. Critical factors that drive the development of such bonded magnets include: higher magnetic performance, better thermal stability and lower cost of alloy components. The latter point has become particularly important...
Permanent-magnet (PM) synchronous machine nowadays has been widely used in industrial applications due to its high efficiency, power factor and torque density [1]. However, torque ripple is a major concern in applications where speed and position accuracy is great important. It is supposed to be a constant value, if the back-EMF and armature current are both ideal sinusoidal waves. In actually, neither...
In order to fully analyze the characteristics of the excitation assistance switched reluctance wind power generator (EASRG), a static model and a dynamic model are built to perform the simulation of the EASRG. The static model is set up by using 3D finite element method (FEM), based on which the static magnetization and torque profiles could be obtained. The dynamic model employing two look-up tables...
Single-phase multiferroic materials have attracted much attention in recent years due to their rich fundamental physics and great application potential[1]. In the last few years, the bismuth-based Aurivillius phase compound, which is formed by stacking fluorite-like (Bi2O2)2+ layers and per-oskite-like (An−1BnO3n+1)2-, is one of the most promising candidates of single-phase multiferroic materials...
This paper presents a wide-band 28–34 GHz frequency synthesizer module developed to support THz spectrometer instruments for planetary exploration. The presented module features low power operation and a small form factor to be compatible with the demanding payload requirements of NASA planetary missions. The core of the module is a CMOS System-on-Chip (SoC) containing a sub-sampled phase-detector...
Due to challenges, such as information collection in huge water, propulsion at different scales and manipulation in extreme fluid environments, wide application of unmanned underwater vehicles (UUVs) is limited. In this paper, an alligator modular robot, composed by 14 small robots, was inspired from the locomotion and morphologies of alligators and microorganisms. With the undulatory body and beating...
This paper presents a method for modeling inter-turn winding faults in SRM based on artificial neural network (ANN), incorporating a simplified and effective magnetic equivalent circuit method to estimate phase flux-linkages as a function of current and rotor position under inter-turn winding faults.
This paper studies the DC bias phenomenon of power transformer and integrated magnetic. A new transformer with function of DC bias elimination is designed based on nano-composite magnetic material and a controllable reactor is integrated into the transformer via integrated magnetic technology. Mathematical model of hysteresis of the magnetic material is established and the correspondence relationship...
Metal debris in lubricating oil contains abundant information regarding the ageing and wear of mechanical transmission systems. The health condition of the lubricated systems can be indicated by the quantity and size of the metal particles, which may provide very early warnings of faults/ failures and benefit the condition based maintenance. Generally speaking, the quantity of the metal debris in...
In recent years, flux modulation is increasingly receiving attention since it is capable of adjusting the pole-pair number and rotational speed of the magnetic field. This principle has already been applied to magnetic gear (MG) to realize the low-speed high-torque operation [1]. Flux-modulated permanent magnet synchronous machine (FM-PMSM) is an integration of a coaxial MG with a conventional outer...
In the last two decades, the permanent magnet linear machines (PMLM) which could directly realize linear movement without any additional transmission mechanisms converting the rotary motion into linear motion, are widely applied in various linear motion systems. Although PMLM shows the advantages of high efficiency, high positioning accuracy and good controllability, the relative low cost-efficiency...
Pathologists often rely on features of the subcellular structures, i.e., nucleus and cytoplasm, to differentiate different types of immune cells. Accurate segmentation of the sub-cellular structures can help classify cell types. However, segmentation in histology tissue images is very challenging, due to, intra-class variations and inter-class similarity, complex and crowded background, and noisy...
An atomistic Monte-Carlo simulator is developed for TaOx-based resistive switching random access memory (RRAM) including both the generation & recombination effect of oxygen vacancy defects with oxygen ions and the phase change effect between Ta2O5 and TaO2. Using the developed simulation tool, the resistive switching characteristics of the bi-layered Ta2O5/TaOx RRAM are investigated. The typical...
Traditional mixed-signal design verification is carried out separately by analog team who run transistor level simulation through different corners, and by digital team who run block simulation on RTL while using analog mixed-signal (AMS) behavior model to represent analog function. That method could not meet the verification requirements for advanced IP integrated SoC designs anymore. An integrated...
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