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The new bearingless doubly salient electro-magnetic motor (BDSEM) with independent dc suspension windings in stator has the advantages of robust structure, and is suitable for high speed application in high temperature environment. The angular position detection is eliminated for suspension force control which decreases the complication and increases the reliability. Although the coupling between...
The new bearingless doubly salient electro-magnetic machine (BDSEM) has advantages of robust structure, naturally decoupled characteristics of the torque and suspension control, and elimination of rotor angular position detection for the suspension control. However, due to the doubly salient pole structure, the instantaneous suspension force cannot be held constant with constant DC suspension current...
In view of the problems of the existing keyword extraction algorithm, such as large amount of computation and complex calculation process, this paper proposes an algorithm based on FP-Growth to extract keyword from Chinese documents. The FP-Growth algorithm mines word co-occurrence information, excluding the interference of noise words; semantic similarity computation using lexical chain eliminates...
In this paper, an electronic nose system was designed to detect wheat qualitative change quickly, this system mainly includes three parts: sampling system, data collection, signal processing and analysis. By detecting gas species released by the wheat in storage, the system can determine whether the has wheat qualitative changed, and the level of wheat qualitative change can be discriminated by the...
This paper presents a data transmission mechanism between the Trusted Platform Control Module (TPCM) and motherboard of host PC via Peripheral Component Interconnect Express (PCIe). The main task contains framework, a finite-state machine, a Linux driver and system testing. Embedded in Design Wave Core (DWC), the Directional Memory Access (DMA) produces measured transfer speeds up to 149MBps for reading...
The gas data coming from an array of chemical gas sensors is a kind of multivariate time-series. This data set is extremely difficult and complex to interpret for human experts. It needs designing hand-made features when applying traditional shallow machine learning algorithms in gas recognition. A new gas recognition method based on Deep Learning were proposed in this paper. It is one of unsupervised...
A report is presented on a novel and effective route to synthesise bismuth nanoparticles (BiNPs) on the electrode surface, which was carried out by ion-exchange in Nafion film coated on the electrode surface and subsequent electrochemical reduction of Bi3+ ions to BiNPs on site. The properties of the resulting BiNPs modified electrode were investigated by scanning electron microscopy, an energy dispersive...
A multi-modal biometric system based on palm dorsal vein and hand shape is proposed in this paper. Palm dorsal vein images are captured with an infra-red sensitive camera under near infra-red illumination. Gaussian matched filter is performed to extract vein patterns from Regions Of Interest (ROI) cropped from original images. As for hand shape features, width, height and triangle features are extracted...
MEMS-based CPW-fed unidirectional antenna array with planar air bridges is proposed in this paper. The performance of the CPW-based feeding network is improved with air bridges fabricated at the discontinuity of T-junctions and bends in the CPW-based feeding network. The simulated impedance bandwidth is from 34.4 GHz to 35.9 GHz with S11<;-10 dB. By adding four reflecting metal patches with circular...
We report here an effective method for the fabrication of a large number of carbon nanotube (CNT) triode-type micro-cathodes. Our technique combines composite electroplating and micromachining, avoiding the tedious direct growth and the screen-printing procedures conventionally used to fabricate such structures. The emitter structure is characterized by uniform diameters and heights, as well as by...
Multi-walled carbon nanotubes (MWNTs) were dispersed into polyimide (PI) by mechanical ball milling. A titanium mesh electrode was covered by the multi-walled carbon nanotubes film. The MWNT - PI film was etched and amidated to get active, homogeneous and stable interface with carbon nanotubes rooted in polyimide. The morphology of the resulting MWNT - PI film was characterized by scanning electron...
Effects of recirculation leachate quality, hydraulic load and frequency on leachate from fresh municipal refuse were investigated in a bench-scale experiment. Recirculation hydraulic load and frequency can affect quality of lechate from fresh refuse. It is testified that the lower COD concentration of leachate re-circulated into the fresh refuse landfill layer contributed to the improvement of leachate...
A modified FKCL (MFKCL) algorithm for automatic segmentation of MR brain images is proposed in this paper. This algorithm is an extension of traditional fuzzy Kohonen's competitive learning algorithm. In our method, a factor that can estimate the effect of the neighbor pixels to the central pixel is introduced into the objective function of the standard FKCL algorithm as the local information. The...
The segmentation of magnetic resonance imaging (MRI) with intensity heterogeneity is a challenging problem that has received an enormous amount of attention lately. In this paper, we propose a simple and effective segmentation method called local-based fuzzy clustering (LBFC) for MR brain images that corrupted by intensity heterogeneity. Firstly, a two-tissue-based method (TTBM) is proposed to generate...
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