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A crack is definitely harmful in metallic components, yet it is maybe useful in a metal barcode label (MBL) application which is a special barcode made up of tiny notches and spaces sculptured in the surface of the un-supporting parts of a metallic component. The obvious different requirement from the eddy current testing (ECT) applied in a non-destructive evaluating (NDE) is that an ECT must distinguish...
A novel single-layer wideband cavity-backed E-shaped microstrip patch antennais proposed. By cutting a U-slot on the E-shaped patch and introducing a rectangle metallic cavity backed on the substrate just under the patch, the proposed antenna can generatevery wide impedance bandwidths. Through a two-section microstrip line impedance transformer, the designed microstrip antenna is fed by a 50Ω coplanar...
The sediment dredging project was conducted for eutrophication control in Dianchi Lake of China. Positive or negative results have been reported in other dredging places. The nitrogen and phosphorus in water and pore water of surface sediments in Dianchi Lake dredging areas were investigated to evaluate the effects of dredging project. The results showed that the deterioration of water quality did...
In this work, total heavy metals (Cd, Cu, Pb and Zn) concentrations and corresponding speciation extraction of the certified reference material (soil GBW07445) were analyzed by flame atomic absorption spectrometry (FAAS) with microwave-assisted digestion (MAD) and microwave-assisted extraction (MAE). The experiments were optimized to improve efficiencies with smaller amount of reagents in less time...
A dual-polarized phased array antenna for synthetic aperture radar (SAR) application is introduced in this paper. The RF topology configuration is illuminated briefly. An antenna module was tested and the measured results are presented, with which an applied array antenna should be extended with RF distribution networks, power supply and control subsystem used.
Nowadays, information technologies are widely used in business. Enterprises hope to make good use of the advanced technologies to analyze customer purchase behavior for better marketing. So it has become a hot issue to find interesting customer purchase patterns in a large amount of information. This paper proposes a method of granular computing to mine interesting purchase patterns. The granule represents...
We report a low-density drain HEMT (LDD-HEMT) that exhibits enhanced breakdown voltage and reduced current collapse. The LDD region is created by introducing negatively charged fluorine ions in the region between the gate and drain electrodes, effectively modifying the surface field distribution on the drain side of the HEMT without using field plate electrodes. Without changing the device physical...
We report a low-density drain high-electron mobility transistor (LDD-HEMT) that exhibits enhanced breakdown voltage and reduced current collapse. The LDD region is created by introducing negatively charged fluorine ions in the region between the gate and drain electrodes, effectively modifying the surface field distribution on the drain side of the HEMT without using field plate electrodes. Without...
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