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The novel method of obtaining cellspsila electrorotation motion parameters through electrorotation test was proposed. Firstly, constructing the cell edge detection algorithm to locate edges, then, the ring window template was used to split every single cell from multicellular images by means of template matching scheme. Feature point tracking and cross-correlation tracking algorithms for cell rotation...
During cell motility tracking process, to suppress background interference and separate the clustering cells contour, a novel cell boundary feature extraction algorithm based on snake model and curvelet transform(CT) is proposed. The CT has higher time-frequency resolution, high degree of directionality and anisotropy. Microscope cell image is denoised by discrete CT to improve SNR. Then curvelet-based...
This paper presents a four-phase high frequency amplitude-stable power supply that acts as a rotary electric field generator in biochip research and development. Four channels of high precision frequency signals are generated by DDS(Direct Digital Synthesis). Via two-stage amplifiers these signals are amplified to 50 Vp-p output within 100 Hz–100 MHz bandwidth on standard...
A series of undecatungstozincate complexes, K n H[ZnW 11 O 39 M(H 2 O)] X H 2 O (M = Ni, Cu, Mn, Co, Fe or Ti), has been prepared and characterized by elemental analysis, 183 W NMR and electrochemistry. The title heteropolyanions catalyse olefin epoxidation by iodosylbenzene or 30% aqueous H 2 O 2 .
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