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This paper successfully demonstrates a logic- compatible, high performance and high reliability, automotive-grade 2.5V embedded NVM process extending over several generations. A high-density flash macro is used to debug process complexities which arise from the add-on modules. The modular approach is adopted for integrating self-aligned, floating-gate-based split-gate SuperFlash® ESF3 cell...
Recently, Spin-Orbit torque (SOT) arising from the ferromagnetic heterostructures consisting of an ultra-thin ferromagnet (FM) sandwiched between a heavy metal (HM) and an Oxide layer has attracted extensive attention in the low power magnetic memory and logic devices.
Current induced spin-orbit effective magnetic fields in metal/ferromagnet/ oxide trilayer provide an alternative switching mechanism that is more efficient than the conventional spin torque transfer.
This paper proposes a fully decentralized control scheme for hybrid AC/DC microgrids. It proportionally shares the loads in a hybrid AC/DC microgrid among its sub-grids. By controlling the interlinking converters as voltage source inverters, the scheme enables the hybrid microgrid to operate with or without AC sources. It is possible to shut down all the power sources in the AC sub-grid to minimize...
Computational conformal geometry focuses on developing the computational methodologies on discrete surfaces to discover conformal geometric invariants. In this work, we briefly summarize the recent developments for methods and related applications in computational conformal geometry. There are two major approaches, holomorphic differentials and curvature flow. The holomorphic differential method is...
We consider the problem of constructing quasi-conformal mappings between surfaces by solving Beltrami equations. This is of great importance for shape registration. In the physical world, most surface deformations can be rigorously modeled as quasi-conformal maps. The local deformation is characterized by a complex-value function, Beltrami coefficient, which describes the deviation from conformality...
Magnetic skyrmions are nanoscale spin textures that are highly stable due to their protected topo-logical charge [1-2]. Skyrmions also experience almost no intrinsic pinning, allowing them to be easily manipulated with low current densities. These positive attributes allows the skyrmion to a very attractive candidate for next generation memory devices [2-4]. In this work, we demonsrate by micromagnetic...
The bin packing problem is widely studied due to its various applications, where the initial sole object is to find a minimum number of bins for the items. In the contrast, a multiple-objective mathematical model for the bin packing problem with multiple constraints is formulated. In an environment with finite packing resources, two novel bin packing algorithms are proposed in this paper. Therein,...
The University of Glasgow-University of Electronic Science and Technology of China joint education programme enrolled its first cohort of students in Fall 2013. Continual assessment of the programme was initiated shortly thereafter to monitor student achievement in the programme, to evaluate how well the aims of the programme are being met, and to determine areas where improvements can be made. Several...
In this paper, a generalized droop-control scheme for low-voltage microgrid is proposed. The control scheme includes three mutually interacting droop control loops for regulating the power flows between the primary energy sources and the common ac bus. The first droop control is adopted directly from the conventional P/f and Q/V droop control for enabling an automatic power sharing between parallel-connected...
In this paper, a power management control scheme based on triple-droop control strategy is proposed for low-voltage microgrid system. The proposed control method is based on traditional P/f and Q/V droop control, but adds two other levels of droop control in response to the DC bus voltage conditions. One of them regulates the output power of micro-source (MS), while the other adjusts the output parameters...
A vibrating fan system is being pursued as a means to create a heat dissipation system. To improve the efficiency of a heat dissipation system, a novel multiple vibrating-fan system that is actuated by both piezoelectric effect and magnetic force has been developed. The performance of the system is affected by the geometry of the fans and the distance between the fans and the heat sink. The surface...
This paper proposes a simple but effectual method to alleviate the voltage stress of the rectifier and improves the overall efficiency of the conventional PSFB converter. This method is based on such a factor that the equivalent circuit of the PSFB converter during the voltage oscillation period can be treated as a fifth-order model, and thus, the amplitude of the voltage ringing across the rectifier...
The fractal dimension of sea clutter is estimated and its multifractal features are analyzed in this paper. A new method based on the difference between multifractal spectra of sea clutter and target plus sea clutter is proposed to detect targets in sea clutter. The verification of real sea clutter shows that this method is useful and has low computation burden. So it provides a new idea and an effective...
An innovative one-side actuating piezoelectric micropump (OAPCP-micropump), which is combined with a 45 mm×28 mm×4 mm cold plate chamber, has been developed to drive liquid in a cooling system for a laptop. The results show that the shape and the numbers of the fins inside the cold plate chamber have strong effects on the pressure drops and flow profiles. The fluid in the pump chamber may impinge...
In this paper, a robust high voltage direct-current (HVDC) wide-area time-delay damping control strategy is proposed to prevent the potential low-frequency power oscillation and enhance the power stability of HVDC/AC interconnected power systems. Firstly, the basic design concept and the related design flow are presented. Then, the general wide-area power system model with the time-delay characteristic...
A hybrid active power compensation device for current balance applied to electrical railway system is proposed. The device consists of inductive filter transformer, reversible single-phase PWM rectifier through a capacitor formed symmetrical structure are installed in two feeders of an impedance-matching balance transformer or a Scott wiring transformer. Inductive filter transformer can compensate...
Different from the existing main-circuit topologies of the HVDC converters, this paper presents a class of improved converter structures constructed by Inductive Filtering (IF) method, which can be used to further construct different HVDC transmission modes. Firstly, the basic operating principle and the technical characteristics of the IF method based HVDC converter is theoretically analyzed. Then,...
In this paper, the fabrication of LTCC capacitor based on a high dielectric-constant LTCC capacitor paste is introduced. A simple analysis is made for failure modes in fabrication process. Small signal and high voltage performance is tested with a single-layer ceramic capacitor sample to prove the possibility to use it in high power converters.
This paper presents the detection and protection methods uniquely associated with three-level NPC voltage source converters. The line-to-ground fault can cause significant DC-link neutral voltage and therefore can be effectively detected and located through monitoring the voltage without extra hardware. The inner device short in the three-level phase-leg can lead to DC- link voltage unbalance and...
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