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This paper mainly studies the speed control for a permanent magnet synchronous motor system. The relationship between the reference quadrature axis current and the speed output is approximately considered as a second-order model. Based on this second-order model, a composite control strategy is adopted, where a continuous sliding mode controller is designed for the speed regulation without chattering...
The U.S. recently adopted a post-grant opposition procedure to encourage third parties to challenge the validity of newly granted patents by providing relevant prior patents that are missed during patent examination (i.e., missing citations). In this paper, we propose a recommendation system for missing citations for newly granted patents. The recommendation system, based on the patent citation network...
This paper studies global synchronization between a heterogeneous dynamical network and a known target trajectory via distributed impulsive control. Synchronization with an error level, called quasi-synchronization, is analyzed by utilizing the time-varying Lyapunov function. Some sufficient quasi-synchronization conditions are presented and explicit expressions of error levels are derived. Furthermore,...
In this paper, the convolution perfectly matched layer (CPML) is proposed to truncate the weakly conditional stable finite-difference time-domain (WCS-FDTD) lattices. Numerical simulations show that the proposed CPML can achieve good absorbing performance and high effectiveness. With its implementation and by incorporating the graphene model and the auxiliary differential equation (ADE) technique...
We demonstrated a four-mode multi/demultiplexer using an LP11 mode rotator and a parallel waveguide with a uniform height on one chip for mode division multiplexing transmission. Four-mode (LP01, LP11a, LP11b, and LP21a mode) multi/demultiplexing was successfully achieved with a fabricated PLC.
Classic analog of the electromagnetically induced transparency (EIT) in metamaterials has been demonstrated extensively by its attractive potential applications in light storage, slow light and sensing. However, the counterpart of EIT, electromagnetically induced absorption (EIA) has been studied rarely in coupled metamaterial systems. Here, we present the observation of the EIA effect in a vertically...
This paper discusses the operation of the central controller for a microgrid. The central controller is responsible to maintain the voltage and frequency of the microgrid within the acceptable ranges while the distributed energy resources supply the required power demand of the loads based on the droop control. The desired ratio among the output active power of the distributed energy resources is...
This paper proposes a novel method for identifying the same records across multiple databases in different languages. In order to identify the same records, we calculate the similarities between records by comparing the text values of metadata elements. The proposed method, i.e. finding the same records across multiple databases, will help users to know which organization has a certain record and...
This paper aims to analyse the influence of fluctuating renewables on small-signal stability. Most of the research on renewable energy integration assumes that power is provided from a static generation unit and studies how much damping ratio and frequency changes as a result of changing power and inertia. This research is motivated by mode coupling where one oscillatory mode may have an effect on...
One essential requirement for a modern Smart Grid is continuous monitoring of the grid variables. This task is efficiently achieved using self-powered electronic devices deployed throughout the grid network. Within the vicinity of the grid power lines, the high voltages of these lines can provide a source of energy for such loads using capacitive coupling. This is known as Electric-Field Energy Harvesting...
With the rapid increase of data, entity resolution (ER) faces two challenges: high quality and high performance. Correspondingly, current work focuses on iteration-based entity resolution or sorted neighborhood (SNM) - based entity resolution. The former iteratively merges similar records to acquire higher precision and recall. The latter only compares the records within the same sliding window to...
Center of pressure (CoP) progression during level walking in subjects with Adolescents Idiopathic Scoliosis (AIS) was measured. Participants were divided into three groups according to scoliosis severity. CoP progression among groups was compared quantitatively and qualitatively. The results showed that scoliosis severity affects CoP progression significantly in the hind-foot and forefoot areas. This...
Record linkage is the task of identifying which records from one or more data sources refer to the same entity. Many record linkage methods were introduced and applied over the last decades. In general, the principle is to compare a range of available identifier fields in record pairs among different data sources, in order to make a linkage decision. The Fellegi-Sunter probabilistic record linkage...
Dyadic brain interactions during eye contact engage multiple processes and recruit multiple networks. To fully characterize these concurrent activities, it's essential to establish the neural basis for reciprocal social interaction. So far most approaches in this pursuit suffered from the limitations in either insufficient dyadic test instruments or entwined reciprocal and non-reciprocal cerebral...
For the first time, a 3-dimentional (3-D) transmission line dual-mode resonator is proposed by using the low temperature co-fired ceramic (LTCC) technology. The proposed dual-mode resonator is reasonably folded in both vertical and horizontal directions for constructing a miniaturized bandpass filter (BPF), which overcomes the vital shortcoming of large circuit size of the LTCC distributed-element...
Ventricular repolarization instability is known to be related to arrhythmogenesis and increased risk of sudden cardiac death. These repolarization dynamics are linked to the distance between T-wave and Q-wave occurrances (QT) on the ECG, and they are coupled with R-wave to R-wave interval variability (RRV). Several efforts have been dedicated to the analysis of QT-RR interactions in order to provide...
In this paper, a new approach to gain-scheduling of robust autopilot was proposed for morphing guided aerial bombs in a bank-to-turn (BTT) mode. The nonlinear dynamic model was established and anticipant performance criterions were given firstly. Feedback robust BTT autopilot of 3-channel was designed independently for selected operating points in order to restrain cross-channel coupling disturbances...
The multivariate coupling characteristics is studied, as well as the characteristics of the coupled mode and its stability. Some available coupling control strategy is put forward, and the parameter of controller is designed. The purpose of this paper is to solve the problem of increasing stability and improving mobility, by the method of decoupling and coupling use.
With the research and application of monopulse antenna, Sum and Difference become an essential element. As the basic component, the magic-T should be paid attention to. Due to the drawback of large profile in traditional magic-T, one planar magic-T structure working at the Ka-band have been designed and simulated in this letter. The E-arm fed through a longitudinal coupling gap in the proposed structure...
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