Yiwan Zhang

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Electrical impedance tomography (EIT) is a relatively new medical imaging method, which is based on the physiological property that different tissues have different impedances. EIT imaging of brain provides neuroimages by detecting functional impedance changes in the brain caused by cell swelling, blood volume and flow increase, and neuronal depolarisation.(More)
Though the concept of single screw compressor has been developed for over 40 years, the manufacturing processes of single screw are still expensive and laborious, because most manufacturers are still using special machine tools to machine it. This situation badly limits the development of new types and new models of single screw compressor, especially those(More)
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